Bausch & Lomb StereoZoom Series User manual

StereoZoom* Series
Microscopes
INSTRUCTION MANUAL
BAUSCH & LOMB (9)
INSTRUMENTS & SYSTEMS DIVISION
ROCHESTER, NEW YORK 14602 USA
716-338-6000, TWX 510-253-6189
TELEX 97-8231, CABLE: BAUSCH & LOMB
StereoZoom
is
a
registered
trademark
of
Bausch
&
Lomb
Incorporated

StereoZoom 4 Pod
on a B Stand
oNowAeN=
. Eyepieces
Eyepiece Adjusting Ring
Magnification Knob
Power Pod
Arm
Illuminator Stations
. Objective Cover
. Spring Clip
11
12:
13.
14.
18.
16.
StereoZoom 7 Pod
on an R Stand
. Glass Stage Plate
10. 3-Way Mirror (not shown)
Trans-lllumination Base
Mirror Axie
Port Hole (not shown)
Base
Upright
Focusing Knob
Fa
18.
19.
20.
21.
22.
23.
. Thumbwheel
Lock Lever
Port Hole (not shown)
Eyepiece Adapter
Eyepiece Ring
Thumbscrew
Base Illuminator
Focusing Slide

CONTENTS
Section
1.0
2.0
3.0
4.0
5.0
6.0
7.0
Introduction
Safety Precautions
Unpacking
Preparation for Use
Mounting the Power Pods
Changing Stand Working Distance
Mounting the Illuminators
Trans-Illumination Base
Operation
Interpupillary Distance Adjustment
Eyepiece Locking Feature of
StereoZoom 5
Focusing Fixed Power Pods
Focusing Variable Power Pods
Changing the Magnification of
Fixed Power Pods
Changing the Magnification of
Variable Power Pods
Measuring Procedure
Selecting a Reticle Disc
Inserting the Reticle Disc
Calibrating the Reticle
Special Reticles
Installation of Supplementary Lenses
Stereo 1 & 2 StereoZoom 3, 4, 5
StereoZoom 7
Maintenance & Service
Protecting the Microscope and
Accessories
Cleaning the Optics
Adjusting Focus Tension on Arms
and Stands
Lubrication
Service
Illumination
Illuminating the Specimen
Transparent and Translucent
Specimens
Diffuse Opaque Specimens
Specular Specimens
Cavities
Illuminators
Nicholas Illuminator
General Purpose Illuminator
Fluorescent Illuminator
Reflector Illuminator
Ring Illuminator
Spot llluminators
Coaxial llluminator
Eyepiece Illuminator
Vertical Illumination Attachment
Page Section
1.0 8.0 Assembly Views and Parts List
Stereo 1 1.0X Fixed
2.0 Power Pod 31-26-91
Stereo 2 2.0X Fixed
2.0 Power Pod 31-26-92
StereoZoom 3 1.0X thru 2.5X Variable
4.0 Power Pod 31-26-93
4.0 StereoZoom 4 0.7X thru 3.0X Variable
4.0 Power Pod 31-26-94
4.0 StereoZoom 5 0.8X thru 4.0X Variable
4.0 Power Pod 31-27-40
StereoZoom 7 1.0X thru 7.0X Variable
5.0 Power Pod 31-27-01
5.0 A Stand 31-26-88
B Stand
5.0 B Base 31-26-84
5.0 KT Stand 31-26-65
5.0 K Stand 31-26-95
S Stand 31-27-14
5.0 SK Stand 31-26-97
E Stationary Arm 31-26-59
5.0 ER Rotary Arm 31-26-90
5.0 10X Eyepiece for Stereo 1 & 2,
5.0 StereoZoom 3, 4,5 31-15-71
51 15X Eyepiece for Stereo 1 & 2,
5.1 StereoZoom 3,485 31-05-62
5.1 20X Eyepiece for Stereo 1 & 2,
5.1 StereoZoom 3,4,587 31-05-63
5.1 15X Eyepiece for
52 StereoZoom 7 31-05-68
Supplementary Lens Attachments for
6.0 Stereo 1 & 2, StereoZoom 3, 4 & 5
0.5X Lens Attachment 31-26-18
6.0 2.0X Lens Attachment 31-26-19
6.0 Lens Shield 31-26-21
Supplementary Lens Attachments for
6.0 StereoZoom 7
6.0 0.25X Lens Attachment 31-27-08
6.0 0.5X Lens Attachment 31-27-04
1.5X Lens Attachment 31-27-05
70
2.0X Lens Attachment 31-27-06
7.0 Lens Shield 31-27-35
9.0 Catalog Items
7.0 Power Pods
70 Stands and Arms
7.0 Stand and Arm Accessories
TA Eyepieces and Eyeguards
HA Supplementary Lens Attachments
τα Polarizing Accessories
TA Micrometer Discs
ua Cases
7.2
7.2 10.0 StereoZoom Microscope Tables
TR Warranty
7.2
73
73
Page
8.1
8.2
8.3
83
8.5
8.8
8.9
8.9
8.10
8.11
8.13
8.13
8.14
8.14
8.15
8.15
8.15
8.15
8.16
8.16
8.16
8.16
8.16
8.16
9.0
9.0
9.0
9.0
9.0
9.0
9.0
9.0
9.1
10.0
10.2

1.0
Introduction
Image excellence, rugged construction and exceptional
versatility are the hallmarks of the Bausch & Lomb
StereoZoom series of stereo microscopes. These
features are in keeping with a tradition of quality Bausch
& Lomb has maintained for more than 100 years as a
microscope manufacturer. The StereoZoom series,
introduced by Bausch & Lomb in the 1950's, has
become the world standard for stereo microscopes.
Since its introduction, the StereoZoom series has
undergone constant improvements and expansion
through the development of new models and
accessories. Interchangeability between Power Pods,
Stands, Eyepieces, Supplementary Lenses and a host of
special accessories provides the user with a nearly
limitless choice of feature combinations which permit the
exact tailoring of the StereoZoom equipment to the
requirements of the task.
The StereoZoom series can be used to advantage for
nearly any visual task requring 3-D observation at
moderate magnifications. Frequently, the StereoZoom
series offers the most economical approach to providing
microscope magnification even when there is no
requirement for 3-D observation.
Six Power Pods form the nucleus of the StereoZoom
series. Two of these are fixed power while four of them
provide continuously variable magnification by means of
operator controlled zoom systems. Eyepieces and
Supplementary Lenses extend the magnification ranges
of these Power Pods both upward and downward. All
optical elements are sealed into the Power Pods so that
all Pods may be interchangeably mounted on any one of
the thirteen Stands and Arms offered as part of the
StereoZoom series. For viewing convenience, the Pods
may be turned 180 degrees for conventional or reversed
eyepiece orientation.
Other accessories include a wide choice of
illuminators and illumination modes, mechanical stages
and stage plates, polarizing accessories, reticles and
photographic equipment.
Selection of the right combination of components
involves consideration of cost, magnification range, field
of view, working distance, eye relief, specimen
illumination
requirements
and
convenience
of
use.
With
this in mind, descriptive data on the StereoZoom series
components are presented in Section 9.0 of this manual
both to assist you in interpreting the instructions
presented here and to help you more fully utilize the
StereoZoom
equipment
you
already
have
purchased.
For more detailed information, send for the latest edition
of Bausch & Lomb’s StereoZoom Microscope Catalog.

2.0 Safety Precautions
Many of the StereoZoom series microscope equipments
are equipped with halogen illuminators. Please note the
type with your equipment and follow the WARNING set
forth below.
WARNING: The Halogen-Cycle Lamp is pressurized and
may shatter. DO NOT operate lamp in excess of rated
voltage as this will increase lamp pressure and the risk
of shattering. Protect the lamp against abrasions and
scratches and against liquids when lamp is operating.
Replace only with specified replacement lamp.
To guard against personal injury, wear protective
glasses and clothing when handling lamp. Turn power
off when installing and before removing lamp. Allow
lamp to cool before removing. Dispose of lamp with
care.
Do not operate in proximity of substance or material
that is flammable or adversely affected by heat or
drying.
3.0
Unpacking
Each of your StereoZoom series microscopes and
accessories have been carefully packaged to insure that
they reach you in the best possible condition. Do not
discard any packing material or shipping containers until
you have assembled your equipment and checked
carefully for any small items that may have been
overlooked
2.0

4.0 Preparation For Use
Note: Parts and controls referred to in this section can
be identified by referring to the photographs and legend
preceding Section 1.0 and to Section 8.0.
MOUNTING THE POWER PODS
Power Pods can be mounted on any Stand or Arm,
except the R Stands, by simply swinging out the two
Lock Levers at either side of the Arm, inserting the Pod
so that it faces either forward or backward, and swinging
the Lock Levers shut. The fit between Pods and Arms is
intentionally snug to prevent movement during use.
Therefore, be sure the Pod is fully seated in the Arm.
On R Stands, the Power Pod is retained in the Arm by
two Thumb Screws instead of the Lock Levers.
CHANGING STAND WORKING DISTANCE
The Stands have provisions for a wide range of working
distances when Supplementary Lenses are added to the
Pods. increased working distance can be
accommodated on the A and B Stands by removing the
four screws from the underside of the Stand, inserting
the 31-27-03 Elevator between the Base and Upright and
securing with the four screws supplied with the Elevator.
The R Stands incorporate a built-in provison for
variable working distance. To change working distance,
remove the four screws which secure the Focusing
Slide, reposition the Arm in the desired location and
reinstall the four screws. Three positions are available.
MOUNTING THE ILLUMINATORS
All Illuminators for StereoZoom microscopes. except the
Coaxial, Ring, Eyepiece and Spot Illuminators, can be
mounted in a variety of ways, either free standing or
attached to a Power Pod or to a Stand. Refer to the
Instruction Manual provided with your Illuminator for
specific instructions.
TRANS-ILLUMINATION BASE
The B Stand for StereoZoom series microscopes is
designed for use with both opaque and transparent
4.0
specimens. This stand is identical to the A Stand except
with the addition of the Trans-lllumination Base, which
includes a Clear Glass Stage Plate and a 3-Way Mirror.
The 3-Way Mirror, when used in conjunction with a
Nicholas or General Purpose Illuminator inserted in the
Port Hole in the rear of the Base, can be used to provide
three types of transmitted illumination for the
examination of a wide variety of transparent/translucent
specimens.
When looking at transparent objects, it is
recommended that the ground surface of the 3-Way
Mirror be used by placing the Mirror Axles of the Base in
the lower pair of Mirror holes. If the object to be
examined is translucent, rotate the Mirror to use the
reflective surface.
If the specimen is transparent, and a dark field
illumination effect is desired, place the Mirror Axles in
the upper pair of holes.
For transparent objects
MOUNT
IN THESE
L
HOLES
GROUND
SURFACE
REFLECTOR
For translucent objects
一
ーー
二 一 一 一
一 一
MOUNT
IN THESE
CZ
^
HOLES
SILVERED 7
MIRROR
For dark field effect
一
一
一
一
=
MOUNT
LL IN THESE
HOLES
一
一
一
一
—
===
—
SILVERED — >
MIRROR
These diagrams illustrate the mounting positions for the
3-way mirror.
For the examination of translucent living specimens,
the
use
of
the
cool,
white-light
Fluorescent
Illuminator
is
recommended.
Refer
to
the
Instruction
Manual
supplied
with this Illuminator for installation instructions.

5.0
Operation
INTERPUPILLARY DISTANCE ADJUSTMENT
To set the Eyepieces for your proper interpupillary
distance, grasp each Eyepiece Adapter while looking
into the microscope and move the Eyepieces together or
apart until you see the full field of view with both eyes.
Check this by closing one eye and then the other
without moving your head.
Each observer must adjust the interpupillary distance
to their individual requirements and should recheck it
each time they use the microscope.
EYEPIECE LOCKING FEATURE OF StereoZoom 5
The StereoZoom 5 Power Pod incorporates an Eyepiece
locking feature
which lets you lock the Eyepiece directly
into the Power Pod while allowing free rotation of the
Eyepieces.
First, roatate the inner Eyepiece Lock Ring until the
Set Screw lines up with the access hole in the Eyepiece
Ring, then insert the hexagonal Wrench (supplied with
the Power Pod) into the Set Screw. Insert the Eyepiece
completely, making sure that it seats properly on its
locating shoulder, and tighten the Set Screw,
Repeat the above procedure for the other Eyepiece.
FOCUSING FIXED POWER PODS
1. Illuminate a flat specimen and then, using the right
eye only, look through the right Eyepiece and focus
on the specimen turning the Focusing Knob until the
image is sharp.
2. Look through the left Eyepiece, and using only the left
eye, rotate the Eyepiece Adjusting Ring clockwise or
counterclockwise until the image is sharp.
Each observer must focus the microscope to their
individual requirements and should recheck it each
time they use the microscope.
FOCUSING VARIABLE POWER PODS
1. Set the Magnification Knob to the lowest power,
illuminate and center a flat specimen within the field of
view. Turn the Focusing Knob until the best image is
obtained.
2. Set the Magnification Knob to the highest power and,
using only your right eye, adjust the Focusing Knob
until the image is sharp. The right Eyepiece is now
properly focused.
Note: depth of field decreases as magnification
increases. It is many times greater at low power than
it is at high power. This means that while it is quicker
and easier to bring the specimen into focus at low
power, the most critical focus can only be achieved at
high power.
3. Reset the Magnification Knob to low power and, using
only the left eye, turn the Eyepiece Adjusting Ring
until the image is clear and sharp. Make sure the
Eyepiece shoulder maintains contact against the
Adjusting Ring shoulder. The left Eyepiece is now
properly focused
The microscope will now be properly focused for
both your eyes throughout the magnification range.
Each observer must focus the microscope to their
individual requirements and should recheck it each time
they use the microscope.
Note: Operators who normally wear glasses with a
correction of 2 or more Diopters, and don’t wear them
when using the microscope may find refocusing
necessary when changing magnification.
CHANGING THE MAGNIFICATION OF
FIXED POWER PODS
The magnification provided by the Fixed Power Pods
may be varied by using different Eyepieces and/or
Supplementary Lenses.
Total Magnification = Fixed Power x Eyepiece Power
x Supplementary Lens Power.
CHANGING THE MAGNIFICATION OF
VARIABLE POWER PODS
The Variable Power Pods allow you to change the power
continuously to exactly the best magnification for a
given specimen by simply turning the Magnification
Knob located on the top of the Power Pod. The
StereoZoom Microscopes allow you to scan an object at
a lower power and then concentrate on some particular
detail by increasing the power gradually to the desired
value.
The power range can be further extended by using
different Eyepieces and/or by adding Supplementary
Lenses below the Objective.
Total Magnification = Variable Power x Eyepiece
Power x Supplementary Lens Power.
MEASURING PROCEDURE
StereoZoom Microscopes may be used as measuring
instruments by inserting a Reticle in one of the Wide
Field Eyepieces. À variety of linear and grid patterned
Reticles are available for particualr applications as well
as Stage Micrometers for calibrating the microscope.
These are described in Section 9.0.
SELECTING A RETICLE DISC
Select the magnification that will enable you to see the
necessary detail and yet cover as much total area of the
specimen as is required. Greatest accuracy will result
from measurements made within the central %rds of the
field of view in a north-south direction. After the
magnification has been selected the appropriate reticle
disc should then be selected. First, decide what unit you
desire to measure the specimen by, then use the
following formula to determine what reticle will provide
that unit:
SxM=K
Dimension each division is to egual in the
specimen plane.
M = Magnification of the Power Pod only.
K = Actual dimension of each smallest division on the
reticle.
o
Il
5.0

Example: Desired dimension on specimen, S = .002"'
Magnification of Power Pod, M = 2X
Actual dimension of division on reticle (egual
to .002“ on the specimen) would be K = .004
(approximately 0.1mm).
INSERTING THE RETICLE DISC
Caution
Before installing a Reticle be sure it is free of dust, lint,
smears, etc. To clean the Reticle wipe its surfaces with
a cotton pad moistened with a mild soap. Rinse and dry
without pressure using a soft lintless cloth.
1. Remove the black cylindrical Field Diaphragm by
unscrewing it from inside the smaller diameter end of
the Eyepiece (refer to the Assembly Views on page
8.14).
2. Place the Reticle into the thin metal rim on top of the
Field Diaphragm so that the scale will face towards
the inside of the Field Diaphragm.
3. The thin metal rim will extend beyond the surface of
the glass. Using a pencil with eraser, or thumbnail or
similar object, press against the outside of the rim to
force it inward and downward against the Reticle.
If the Reticle is to be temporarily installed, bend in the
metal rim at three points around the glass. If the
Reticle is to be permanently installed, do this at three
points around the circumference and then bend the
rim over the Reticle around the whole circumference
by holding the mount at a 45° angle and rolling itona
hard surface such as a table top.
4. Replace the Field Diaphragm and Reticle assembly by
screwing it in until the scale comes into sharp focus
when viewed through the Eyepiece.
5. To remove the Reticle, press against the scale side of
the Reticle and push it out of its mount.
CALIBRATING THE RETICLE
After the correct Reticle has been selected it must be
calibrated. If the Reticle is to be calibrated in inches a
31-16-89 or 31-16-87 Stage Micrometer should be used.
If the Reticle is to be calibrated in millimeters a 31-16-90
or 31-16-99 Stage Micrometer should be used.
For the most accurate calibration and measurements,
the Reticle and the Stage Micrometer both should be
positioned in the north-south direction.
The Reticle must be calibrated for each objective
power that it is used with and must also be calibrated for
each StereoZoom microscope that it is used with.
4. It is recommended that the Eyepiece containing the
Reticle be placed in the right Eyepiece Adapter.
2. Place the appropriate Stage Micrometer on the
Microscope Stage Plate.
3. Focus carefully so that you see the Stage Micrometer
scale sharply in focus at the same time as the Reticle
scale is sharply in focus.
4. Align the Reticle scale with the Stage Micrometer
scale so that they may be compared.
. Read the number of scale intervals “b” on the Stage
Micrometer which correspond to the number of
intervals “a” on the Reticle. One interval of the Reticle
then corresponds to b/a intervals of the Stage
a
5.1
Micrometer. Compute this ratio and use it to make
measurements in the specimen plane.
SPECIAL RETICLES
Often industrial or experimental applications require
special custom made scales such as a Reticle that could
be used as a “GO - NO GO” gauge.
For a quotation on special reticles to your specifications
write:
Bausch & Lomb
Dept. 7615
820 Linden Avenue
Rochester, NY 14625
In your request state the objective magnification you
prefer to work with and the model of Wide Field
Eyepieces in which the reticle will be placed. An
accurate drawing of the pattern you need, fully
dimensioned, must be submitted. The example below
illustrates the kinds of dimensions required.
3 CONCENTRIC
T CIRCLES
DIAMETERS
‘pos, 006, 000
Se À
a
si
y er
그러 | oan
mor
020 | 一
i 920"
TYPICAL PATTERN FOR RULING RETICLE DISC
INSTALLATION OF SUPPLEMENTARY LENSES
Until you are familiar with the installation procedure it is
recommended that you first remove the Power Pod from
its Stand and remove the Eyepieces, turn the Power Pod
upside down and install the Supplementary Lens as
noted below, then insert the Power Pod back in its Stand
and replace the Eyepieces.
Once you have become familiar with the procedure,
the Supplementary Lens may easily be installed without
removing the Power Pod from the Stand.
Stereo 1& 2
StereoZoom 3, 4 & 5
Working
Cat. No. Distance
31-99-14 0.3X 276mm
Supplementary Lens (10%)
31-26-18
0.5X
178mm
Supplementary Lens ( 7“)
31-26-19 2.0X 38mm
Supplementary Lens (1%!)

To mount one of these Supplementary Lenses, simply
screw it into the large diameter thread located on the
bottom of the Power Pod housing. Make sure it is
threaded securely against the shoulder.
NOTE: If the threads start to seize-up during
installation, apply a very small amount of oil to the Lens
thread, wipe away the excess and reassemble.
The 0.3X and 0,5X Lenses are retricted to use on those
Stands where the working distance is attainable as on K,
KT, S or SK, or the A and B Stands when used in
conjunction with the 31-27-03 Elevator.
StereoZoom 7
Working
Cat. No. Distance
31-27-08 0.25X 266mm
Supplementary Lens (104)
31-27-04 0.5X 127mm
Supplementary Lens (5)
31-27-05 1.5X 32mm
Supplementary Lens (4)
31-27-06 2.0X 14mm
Supplementary Lens (9/16")
CAUTION
When installing or removing a Supplementary Lens, be
careful that its pins do not scratch the objective lenses
in the Power Pod.
1. Position'the Supplementary Lens so that the longer
pin projects perpendicular to the flat face of the Power
Pod as shown below.
2. Seat the Supplementary Lens in the shallow
semicircular recess in the Power Pod and rotate it
clockwise 90° until it clicks into position. Check to see
that it is properly mounted and make sure that the flat
side of the Supplementary Lens is aligned with the flat
face of the Power Pod.
3. To remove the Supplementary Lens, rotate it
counterclockwise 90° and then remove it carefully
from the Power Pod.
5.2

6.0
Maintenance & Service
PROTECTING THE MICROSCOPE AND ACCESSORIES
The primary rule to follow with respect to proper care of
microscopes and accessories is to keep them as free
from dust and dirt as possible. Dust, fingerprints or a
smear on the optics will degrade the image. When the
equipment is not in use, cover it with a plastic cover.
CLEANING THE OPTICS
The Power Pods have been factory aligned, cleaned and
sealed. DO NOT attempt to disassemble them. Within
each Eyepiece Adapter is a glass dust cover. The
Eyepieces should be kept in place to prevent dust from
settling on these covers. However, if dust does
accumulate, it can be removed by unscrewing the
Eyepiece Adapter and wiping the dust cover with a soft
clean cloth. If the dust is gritty, it should be blown off
with an air syringe or wiped off with a cloth or cotton
swab moistened with soap and water or alcohol followed
by a thorough wiping with a dry cotton swab.
CAUTION
Avoid excessive use of solvents, as flowing solvents
may cause cement run-in on cemented optics, making
cleaning a tedious job.
ADJUSTING FOCUS TENSION ON ARMS AND STANDS
Both Arms and all Stands except the R, S and SK Stands
have two hex socket-head Gib Screw B's which can be
used to adjust the tension of the focusing mechanism.
By turning these screws slightly clockwise or
counterclockwise, the tension can be increased or
decreased. When making this adjustment, be sure to
adjust the screws in the same direction and about the
same amount.
Each R Stand is factory adjusted to establish the
proper balance between the tension of the focusing
mechanism and the load carrying capacity. After
considerable use, a slight readjustment may be needed.
To increase the focusing tension, tighten the hex
socket-head screw in the center of the left Focusing
Knob about 1/12 of a turn clockwise using a 7/64-inch
hex wrench. To decrease the tension, loosen the screw
about 1/2 turn counterclockwise and pull the left knob
outward to reduce the tension. Then tighten the screw
gradually until the desired tension is established.
LUBRICATION
Power Pods and R Stands are permanently lubricated at
the factory and generally do not require periodic
6.0
lubrication. If cleaning and relubrication become
necessary as a result of abnormal use or exposure to
unusually harsh environments, the equipment should be
returned to the factory or serviced by qualified
maintenance personnel.
The Focusing Slide on all stands other than R stands
should be wiped clean occasionally, using a solvent
such as Xylol or alcohol, and relubricated with a light
coating of grease. Alvania +2 grease, which is available
at Shell service stations, is recommended for this
purpose.
SERVICE
All optical, electrical and mechanical equipment requires
periodic servicing to keep it performing properly and to
compensate for normal wear.
Establishing a schedule of regular preventive
maintenance will help to assure long life and sustained
optimum performance for your instrument. It will also
help to avoid unexpected trouble and the necessity of
having the instrument serviced at inconvenient times.
A program of planned preventive maintenance,
involving a thorough cleaning, checking and adjustment
of mechanisms is recommended for all instruments.
This work should be performed by qualified personnel
with the proper training and equipment. Your authorized
B&L dealer, or Bausch & Lomb, can arrange this service.
IMPORTANT
If unexpected trouble is experienced with your
instrument, contact your Bausch & Lomb dealer. He may
be able to suggest simple remedies to correct the
apparent difficulty without your having to send the
instrument out for servicing.
Should it become necessary to send your instrument
out for service:
Please pack the instrument carefully in a crush
resistant carton with at least three inches of shock
absorbing, dustless material surrounding it to prevent
transit damage. Saving the original carton in which your
instrument is received will prove helpful for this purpose.
If a suitable carton is not available, one may be ordered
from the factory at nominal cost.
Include a detailed letter in the shipping carton,
preferably fastened to the instrument, describing the
trouble experienced. This information will enable the
service technician to effect required repairs promptly
and at least expense.

7.0
ILLUMINATING THE SPECIMEN
The full potential of your stereomicroscope can be
realized
only
if
the
microscope
is
equipped
with the
right
kind of illumination system. Equally important
considerations are operator comfort and efficiency,
which also depend upon specimen illumination.
Providing
optimum
illumination
is
complicated
by
the
great variety of specimens which are examined under
stereomicroscopes and by the very nature of
stereomicroscope design. A StereoZoom microscope
embodies two separate and complete microscope
systems mounted at different viewing angles with respect
to the specimen, and optimum viewing requires a critical
balance between the illumination supplied to the two
microscope systems.
No single Illuminator is capable of satisfying the
requirements for all kinds of specimens. For this reason
Bausch & Lomb offers a number of different Illuminators.
Each Illuminator is suitable for a variety of specimen
types, but usually there is a “best” Illuminator for each
specimen. Following are some general suggestions for
Illuminator selection; however, it may be necessary to do
a little experimenting before the optimum solution is
reached for some particularly difficult specimens.
TRANSPARENT AND TRANSLUCENT SPECIMENS
For these specimens a properly equipped B or R Stand
is recommended. The R Stands are available in five
models, two of which have built-in Base Illuminators and
Transformers and no additional equipment is required.
The R Stands are especially recommended for
photomicrography with the StereoZoom 7 Power Pod.
The Fluorescent Illuminator is recommended for use
with the B Stand when highly diffuse illumination is
required (not suitable for color photomicrography). For
more intense directional illumination, the B Stand with its
built-in 3-Way Mirror and an attached Nicholas or
General Purpose Illuminator is recommended. The focus
feature of the General Purpose Illuminator makes it the
better choice. Care should be exercised with both
Illuminators to align both the Reflector and the
Illuminator so that balanced illumination is provided for
both halves of the microscope. For completely
transparent specimens, the diffuse side of the Reflector
should face the Illuminator because full aperture
illumination cannot be achieved with the mirror side at
low magnification levels.
DIFFUSE OPAQUE SPECIMENS
In general, any Illuminator will make this kind of
non-reflective specimen visible in the microscope;
however, the choice of Illuminators will have a profound
effect on the visibility of specimen detail. Contours can
be made visible by the shadows cast when the specimen
is illuminated from one side only and at a large angle of
incidence. Changing the Illuminator position will
enhance some details while suppressing others. When
desirable, shadows can be eliminated completely by the
simultaneous use of two or more Illuminators or by using
Illumination
an
omni-directional
source
such
as
the
Ring
Illuminator.
The
Ring,
General
Purpose
and
Reflector
IIluminators
are
recommended
for
use
on
large
objects
such
as
minerals,
coins,
electronic
and
mechanical
components,
gems
and
powders
and
for
dissecting
and
other
work
involving
the
manipulation
of
tools
under
the
microscope.
SPECULAR SPECIMENS
Bright field illumination of specular (highly reflective)
surfaces demands that the optical Law of Reflection be
taken into account. The axis of the Illuminator must be
positioned so that after reflection from the specimen
surface, the direction of the image-forming rays will
coincide with the axes of the microscope. This condition
can be fulfilled by tipping the specimen and orienting the
Illuminator as illustrated below.
Illuminator
Specimen
The out-of-focus condition of large areas of the
specimen image which results from this method of
illumination can be avoided completely on Stereo 1 & 2
or StereoZoom 3, 4 & 5 Power Pods by use of a Spot
Illuminator or a Vertical Illumination Attachment. A
StereoZoom 7 Pod equipped with a Coaxial Illuminator
will also eliminate this problem.
The Coaxial illumination system used in conjunction
with the StereoZoom 7 Power Pod is applicable to nearly
all kinds of specular specimens, with the images of
polished specimens appearing exactly the same as when
viewed through a metallograph or metallurgical
microscope.
Somewhat less effective illumination for specular
specimens may be attained with all StereoZoom series
microscopes by adding a Vertical Illumination
Attachment to the Power Pod and by employing either a
General Purpose, Nicholas or Reflector Illuminator
7.0

attached to the Stand or Power Pod. This can also be
achieved by using a Spot Illuminator on a Stereo 1 or 2,
or StereoZoom 3, 4 or 5 Power Pod. A StereoZoom
microscope equipped for vertical illumination is shown
on page 7.3
CAVITIES
Special illuminators are generally required when viewing
any kind of opaque or translucent surface located on the
side or at the bottom of a deep cavity. The Spot
Illuminators are designed primarily for cavity illumination
or wherever a compact vertical illuminator is required.
They can be used on all Power Pods except the
StereoZoom 7. Three models are available, each being
GENERAL PURPOSE
ILLUMINATOR WITH IRIS
DIAPHRAGM
NICHOLAS ILLUMINATOR
GENERAL PURPOSE
ILLUMINATOR WITH IRIS
DIAPHRAGM AND FILTER
HOLDER
GENERAL PURPOSE
ILLUMINATOR
GENERAL PURPOSE
ILLUMINATOR WITH
IRIS DIAPHRAGM,
NICHOLAS
ATTACHMENT AND
FILTER HOLDER
Wal
designed for a particular working distance and
magnification factor as described on page 7.2
The Vertical Illumination Attachment combined with
either the Nicholas or General Purpose Illuminator is
another solution. The Vertical Illumination Attachment
work with all StereoZoom Pods.
ILLUMINATORS
There are eight types of illuminators which may be use
with StereoZoom microscopes.
Nicholas Illuminator
General Purpose Illuminator
Fluorescent Illuminator
Reflector Illuminator
Ring Illuminator
Spot Illuminators
Coaxial Illuminator
Eyepiece Illuminator
The type of illuminator chosen is determined by the
type of specimen, the area of the specimen which mus
be illuminated and the intensity of the desired
illumination. Whenever possible, mount the illuminator
the microscope so that the illumination stays centered
the microscope is focused on specimens of different
thickness.
NICHOLAS ILLUMINATOR provides a directional
concentrated beam of relatively high intensity light. It
can be supplied with an adjustable Linkage and a
three-step variable Transformer. The Nicholas Illuminaf
may be mounted in the hole in the arm of the A Stand,
in the Stationary Arm, or in the hole at the rear of the t
Base. It may also be mounted to the Linkage which mz
be
attached to either of the two holes in the Power Pov
or R Stand, or fastened directly to the threaded hole ir
the top of the Transformer and used as a movable
source to bring light in from any direction. In its variou
positions, it can be used to examine opaque-diffuse
materials, translucent materials, and transparent
materials.
GENERAL PURPOSE ILLUMINATOR provides an inter
spot of light which is concentrated in a relatively small
field and focusable from three inches to infinity.
It can be supplied with a 3-step, variable Transforme
and an adjustable Linkage. When equipped with a
Linkage, the General Purpose IIluminator may be
mounted directly to the StereoZoom Power Pod or R
Stand, or to the Transformer. Four accessories have
been designed for use with the General Purpose
Illuminator:
1. The adjustable Iris Diaphragm is an aperture contre
which regulates brightness. Used with the Nicholas
Attachment, it is a field diaphragm which regulates
size of the spot of light.
2. The Filter Holder holds two-inch round or square
filters and can be attached to the basic illuminator,
Iris Diaphragm, or the Nicholas Attachment.
3.
The
Nicholas
Attachment
contains
a
focusable
telephoto
type
projection
lens
system
which
can
image
the
field
diaphragm
from
six
inches
to
infinity
can
be
used
with
or
without
the
Iris
Diaphragm
and
the
Filter
Holder.

4. The Cone Adapter attaches to the illuminator housing
or the Iris Diaphragm permitting the illuminator to be
mounted in the E Arm, A stand, B Base or the
Nicholas Adapter on an ER Arm
FLUORESCENT ILLUMINATOR provides a cool diffuse
light of daylight character.
When it is mounted in the base of the B stand, it may
be used to examine transparent specimens. When it is
mounted on the Linkage, it may be used to examine
opaque materials. It is especially effective where
surfaces are highly reflective. The Fluorescent
Illuminator is particularly useful for examining live
specimens because its light is cool.
REFLECTOR ILLUMINATOR gives moderately directional
lighting of a fairly high intensity. It illuminates a general
area. It is a versatile illuminator and can be used with
opaque-diffuse materials and translucent materials.
RING ILLUMINATOR The source is a dual concentric
ring fiuorescent tube providing cold light of daylight
quality. The lamp is mounted on a StereoZoom Power
Pod by means of a coupler and on the StereoZoom 7 by
means of a converter and coupler.
Use in conjunction with the B&L Coaxial Illuminator
System results in very effective shadowless illumination
of the specimen
SPOT ILLUMINATORS are available in three models to
provide vertical illumination for all StereoZoom series
Power Pods except the StereoZoom 7
The three models offer a range of working distance from
3" to 10” with magnification factors of 1.0X, 0.5X and
0.3X to provide vertical illumination for the examination
of PC. boards, cracks, crevices and holes up to a depth
of 10”. These compact illuminators attach to the bottom
of the Power Pods by means of a threaded adapter and
provide an uncluttered work space above and around
the specimen.
COAXIAL ILLUMINATOR for StereoZoom 7 only is an
ideal illuminator for viewing flat, highly reflective
specimens, and is a compact unit which allows complete
flexibility of the StereoZoom 7 Microscope. It is
equipped with green, yellow, and daylight blue filters in a
unique rotating turret. The easily changed lamp is
powered by a three-tap Transformer. The Coaxial
Illuminator must be installed to the StereoZoom 7 Power
Pod at the factory.
GENERAL
PURPOSE
ILLUMINATOR
WITH CONE
ADAPTER
FLUORESCENT
ILLUMINATOR
REFLECTOR
ILLUMINATOR
RING ILLUMINATOR
oF
SPOT ILLUMINATOR
COAXIAL ILLUMINATOR
7.2

EYEPIECE ILLUMINATOR—designed primarily for use
with the StereoZoom 7 Power Pod when equipped with a
photomicrographic system or viewing screen. It provides
the same efficient illumination as a Coaxial Illuminator
for precise examinations of multilayer, flat, and opaque
objects in semiconductor and electronics applications.
Includes a built-in filter holder for accepting any of
several available 13/16" diameter filters.
VERTICAL ILLUMINATION ATTACHMENT
If straight top lighting is necessary to bring out surface
detail, one of the external illuminators already mentioned
may be used in combination with the Vertical
Illumination Attachment. This Attachment has no light
source of its own. Instead, it has a mirror system which
reflects light directly downward on the specimen.
The Vertical Illumination Attachment is especially
useful for examining interior surfaces of castings or
machined parts, cracks, holes and crevices. The Vertical
Illuminator Adapter is attached to the bottom of the
Power Pod in the same manner as a Supplementary
Attachment Lens, oriented as necessary and clamped in
place by a thumb screw.
$F.
De
VERTICAL ILLUMINATION
ATTACHMENT WITH
GENERAL PURPOSE
ILLUMINATOR
7.3
EYEPIECE ILLUMINATOR

8.0
Assembly Views and Parts Lists
8.0

STEREO 1
1.0X Fixed Power Pod,
Cat. No. 31-26-91
Key Description Part No.
1 Eyepiece Ring 312694-175
2 2-64T x ho Set Screw 312701-379N
3 Eyepiece Adapter 312694-369
4 Ret. Ring 312694-321
5 Dust Seal Cap 312694-259
6 Dust Seal 312740-129
7 Eyepiece Adj. Ring 312694-129
8 Pivot Screw A 312694-144
9 Mirror Housing 312691-126
10 F-309 Washer 90008-377
11 F-108 Washer 90008-281
12 Adapter 312694-269
13 Dust Seal Washer 312694-234
14 4-48 x % Set Screw 315153-120N
15 Dust Cover 312694-052
16 Body Tube 312694-277
17 Pin 312799-171
18 Eyepiece Mount Support 312799-102
19 Housing 312692-105
20 8-32G10S Screw 96208-0808
21 Objective Cover 312694-370
22 6-32 x %e Ig Screw 316012-150
23 6-40 x 7%: lg Screw 312694-125
24 4-48 x %« Screw 312694-326 ト
25 F-120 Washer 90008-125
26 Eyepiece Mount Right 312799-116
Eyepiece Mount Left
(not exploded) 312799-115
*27 Mirror Mount Right Assy 312694-376
Mirror Mount Left Assy
(not exploded) 312694-375
28 Lens Mount 312691-101
29 Lens AB Assy 312691-023
30 Retainer Ring 423496-106
31 8-36 x %2 Screw 312694-327N
32 6-40T x % Screw 312694-324N
*Sold in assembled units only.
8.1

Key
827
28
29
30
31
32
Description
Eyepiece Ring
2-64T x As Set Screw
Eyepiece Adapter
Ret. Ring
Dust Seal Cap
Dust Seal
Eyepiece Adj. Ring
Pivot Screw A
Mirror Housing
F-309 Washer
F-108 Washer
Adapter
Dust Seal Washer
4-48 x 4 Set Screw
Dust Cover
Body Tube
Pin
Eyepiece Mount Support
Housing
8-32G10S Screw
Objective Cover
6-32 x %s lg Screw
6-40 x 2%: lg Screw
4-48 x %s Screw
F-120 Washer
Eyepiece Mount Right
Eyepiece Mount Left
(not exploded)
Mirror Mount Right
Mirror Mount Left
(not exploded)
Lens Mount
Lens AB Assy
Retainer
8-36 x %z Screw
6-40T x % Screw
*Sold in assembled units only.
Part No.
312694-175
312701-379ND
312694-369
312694-321
312694-259
312740-129
312694-129
312694-144
312692-123
90008-377
90008-281
312694-269
312694-234
315153-120ND
312694-052
312694-277
312799-171
312799-102
312692-105
96208-0808
312694-370
316012-150
312694-325ND
312694-326ND
90008-125
312799-116
312694-374
312694-373
312692-101
312692-023
312692-102
312694-327ND
312694-324ND
Stereo 2
2.0X
Fixed
Power
Pod,
Cat. No. 31-26-92
8.2

StereoZoom 3
1.0X thru 2.5X Variable Power Pod, Cat. No. 31-26-93
StereoZoom 4
0.7X thru 3.0X Variable Power Pod, Cat. No. 31-26-94
Key
Description
STEREOZOOM 4
1
6
ら
oo
の
の ょ
oN
11
12
13
*14
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
149
47
48
49
50
52
53
54
55
8.3
Eyepiece Ring
2-64T x No Set Screw
Eyepiece
Adapter
Dust Seal Cap
4-48 Set Screw
Dust Cover
Dust Seal
Eyepiece Adj. Ring
Mirror Housing
Ret. Ring
Adapter
Dust Seal Washer
Spring Pin
Body Tube—must be assembled
with key 43
Mirror Mount Right Assy
Mirror Mount Left Assy
(not exploded)
Eyepiece Mount Support
Tru-Arc Ret. 5133-25
F-310 Spring Washer
Screw, 6-32 x %
Bearing Screw (4)
F-306 Washer
Lock Nut
Gear Drive Support
Ball .1562 Ø (4)
Lead Screw Mount
6-40 x % Screw
F-306 Washer
Lens E-F Assy
Retainer
E-F Lens Mount
2-56 x Ke Screw (2)
Retainer
Cover Gasket
6-40 x 2%2 Screw
6-32 x %2 Screw
Pivot Screw “A”
F-309 Washer
F-108 Washer
Screw, 4-48 x Ув
F-120
EP Mount Right (refer to key 14)
EP Mount Left (not exploded)
Mount AB
Objective Driven Gear 2
Gear Lock Nut
Cell Mount B & Pad Assy
AB Lens Assy
Magnification Knob Assy
Washer F-304
Set Screw
Part No.
312694-175
312701-379ND
312694-369
312694-259
315153-120ND
312694-052
312740-129
312694-129
312694-367
312694-321
312694-269
312694-234
312799-171ND
312694-277
312694-376
312694-375
312799-102
312695-111ND
90008-378
312694-329ND
312694-118
90008-369
312694-322
312799-107
312694-152ND
312799-265
312694-328ND
90008-369
312694-029
312692-102
312799-256
312694-302ND
312692-102
312694-312
312694-325ND
316012-150
312694-144
90008-377
90008-281
312694-326ND
90008-125
312799-116
312799-115
312799-272
312694-121
312694-169
312694-351
312694-023
312694-366
90008-367
312694-236ND
Key
56
#57
358.
#59
61
62
63
64
65
66
67
68
69
70
71
73
74
75
76
77
78
81
Description
Washer
Drive Gear Shaft
F-305 Washer
Objective Drive Gear
Set Screw
Lead Screw & Gear Assy L.H.
Lead Screw & Gear Assy R.H.
(not exploded)
2-56 x .312 LG Screw
F-119 Washer
F-132 Washer (not shown)
Cover
Cover
Spring
Рад “В”
Objective Mount Cover
Cell Mount A Pad Assy
Lens CD Mount
Cd Lens Assy
2-64 x ‘42 Ig Spline Set Screw (8)
Guide Bar
Screw, 8-36 x %2
Lens E-F Assy
Objective Cover
Objective Driven Gear RH
6-40 x % Screw
STEREOZOOM 3
All
parts
are
similar
to
those
for
the
31-26-94
Power
Pod
except:
9
53
*57]
*58
*59
*60)
Mirror Housing
Magnification Knob Assy
Drive Gear & Shaft Assy
*Sold in Assembled Units Only
Part No.
312694-141
312694-139
90008-368
312694-120
312694-229ND
312694-201
312694-266
312694-292ND
90008-124
90008-142
312799-178
312694-372
312694-105
312799-178
312694-348
312799-274
312694-037
312694-310ND
312694-106
312694-327ND
312694-029
312694-370
312694-264
312694-324ND
312693-141
312693-140
312693-132

ss
EN
<
©
Sr
Se
(8°
Z
HEVET
+
p
y

StereoZoom 5
0.8X thru 4.0X Variable Power Pod,
Cat. No. 31-27-40
oo
ς
8.5