Oriel MS257 Series User manual

MS257 USB/RS232
MONOCHROMATOR
AND
SPECTROGRAPH
User's
Manual
MODELS: MS257-M-FH-A, MS257-M-FH-L, MS257-M-FH-D, MS257-M-MC-A,
MS257-M-MC-L, MS257-M-MC-D, MS257-M-MT-A, MS257-M-MT-L, MS257-M-
MT-D, MS257-S-FH-A, MS257-S-FH-L, MS257-S-FH-D, MS257-S-MC-A, MS257-
S-MC-L, MS257-S-MC-D, MS257-S-MT-A, MS257-S-MT-L, MS257-S-MT-D
Family of Brands –Corion® •New Focus™ • Oriel® Instruments •Richardson Gratings™ • Spectra-Physics®
M77781A, Rev B

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TABLE OF CONTENTS
1 SAFETY OPERATING
PRECAUTIONS ................................................................................................4
2 INTRODUCTION ....................................................................................................................................5
3 SETUP AND MOUNTING ...................................................................................................................... 6
3.1 MOUNTING MS257 TO A FLAT SURFACE........................................................................... 6
3.2 MOUNTING OTHER INSTRUMENTS TO THE MS257......................................................... 7
3.3 TURRET INSTALLATION ....................................................................................................... 8
4 QUICK START........................................................................................................................................9
4.1 WORKINGWITH THE HAND CONTROLLER ....................................................................... 9
4.2 WORKINGWITH A COMPUTER ........................................................................................... 9
5 INSTRUMENT DESCRIPTION ............................................................................................................10
5.1 LAYOUT AND MAJOR FEATURES ..................................................................................... 10
6 CONFIGURATION VERSATILITY .......................................................................................................11
6.1 USE AS A MONOCHROMATOR.......................................................................................... 11
6.2 USE AS A SPECTROGRAPH .............................................................................................. 12
6.3 USE AS AN IMAGING SPECTROGRAPH ........................................................................... 12
6.4 INSTRUMENT FEATURES .................................................................................................. 13
7 INSTRUMENT OPERATION ................................................................................................................14
7.1 INSTRUMENT CONFIGURATION ....................................................................................... 14
7.2 UTILITY AND CONFIGURATIONSOFTWARE ................................................................... 16
7.2.1 MS257 UTILITY SOFTWARE ............................................................................... 16
7.2.2 UTILITY SOFTWARE INSTALLATION ................................................................. 17
7.2.3 MS257 CONFIGURATION SOFTWARE............................................................ 25
7.3 77709 HAND CONTROLLER ............................................................................................... 33
7.4 COMMUNICATIONS............................................................................................................. 42
8 PROGRAMMING MS257 ..................................................................................................................... 43
9 ACCESSORIES ....................................................................................................................................44
9.1 GRATING TURRETS ............................................................................................................ 44
9.2 CONFIGURING THE MS257 FOR TURRET INSTALLATION ............................................. 44
9.3 GRATINGS............................................................................................................................ 45
9.4 SLITS .................................................................................................................................... 46
9.5 FILTER WHEELS .................................................................................................................. 53
9.6 INPUT AND OUTPUT PORTS.............................................................................................. 54
10 SPECIFICATIONS................................................................................................................................57
11 APPENDIX A - BASIC GRATING INFORMATION .............................................................................. 60
12 DECLARATION OF CONFORMITY.....................................................................................................67
13 WARRANTY AND RETURNS ..............................................................................................................68
13.1 CONTACTING ORIEL INSTRUMENTS................................................................................ 68
13.2 REQUEST FOR ASSISTANCE/ SERVICE ......................................................................... 69
13.3 REPAIR SERVICE................................................................................................................ 69
13.4 NON-WARRANTY REPAIR .................................................................................................. 70
13.5 WARRANTYREPAIR ........................................................................................................... 70
13.6 LOANER / DEMO MATERIAL............................................................................................... 71

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LIST OF FIGURES
Figure 1: Grating Care and
Handling..........................................................................................................4
Figure 2: MS257 Dimensions......................................................................................................................6
Figure 3: Input and Output Ports .................................................................................................................7
Figure 4: Mounting Hole Pattern for Ports ..................................................................................................7
Figure 5: MonochromatorInterior Layout..................................................................................................10
Figure 6: Light Path of a Monochromator .................................................................................................11
Figure 7: Light Path of a Spectrograph .....................................................................................................12
Figure 8: Light Path of Imaging Spectrograph ..........................................................................................12
Figure 9: Utility Program Main Window.....................................................................................................24
Figure 10: Configuration Program main window ........................................................................................32
Figure 11: Hand Controller Keypad ..........................................................................................................36
Figure 12: Rear Panel Connections ..........................................................................................................42
Figure 13: Quadruple Grating Turret.........................................................................................................44
Figure 14: Using Fixed Slits with MS257 ..................................................................................................47
Figure 15: Micrometer Driven Slit Dimensions...........................................................................................49
Figure 16: Micrometer Driven Slit Adjustments.........................................................................................50
Figure 17: Micrometer Driven Slit Closed Position ...................................................................................50
Figure 18: Motorized Slit ............................................................................................................................51
Figure 19: Filter Installation ........................................................................................................................53
Figure 20: Motorized Flip Mirror .................................................................................................................55
Figure 21: Dual Source Configuration........................................................................................................56
Figure 22: Diffraction Geometryof a Plane Reflection Grating..................................................................60
Figure 23: The "Grating Equation".............................................................................................................61
Figure 24: Grating Resolution....................................................................................................................63
Figure 25: Diffraction Orders ......................................................................................................................64
Figure 26: Polarization and Efficiency........................................................................................................66

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M77781A
MS257™USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
1 SAFETY OPERATING PRECAUTIONS
Electrical
The MS257 operates from nominal ac mains of 115/230 Vac. Do not attempt to work in the electrical
compartment without first disconnecting the power cord, since you may contact high voltage areas inside
the compartment.
The MS257 has an internal microprocessor and should be installed with appropriate surge/EMI/RFI
protection on all power lines. Dedicated power lines or line isolation may be required for some extremely
noisy sites.
The circuits used in MS257 are extremely sensitive to static electricity and radiated electromagnetic fields
and therefore MS257 should not be used nor stored in close proximity to EMI/RFI generators,
electromagnetic/electrostatic field generators, radioactive devices, or other similar sources of high energy
fields. Some examples of equipment, which can cause problems, are plasma sources, arc welders, radio
frequency generators, x-ray instruments, and pulsed/ triggered gas discharge optical sources. Operation
of the MS257 close to intense pulsed sources (lasers, xenon strobes or arc lamps, and the like) may
compromise performance if shielding is inadequate, and may cause permanent damage to the
microprocessor. Do not place any containers containing liquids on top of the instrument. There is a
danger that liquid may enter the ventilation holes in the electronics compartment and cause a short
circuit. This maycause the instrument to fail.
Mechanical
Avoid dropping, sudden shocks, or rough handling of the monochromator since this may cause the
system to lose its calibration and may destroy the high precision drive components or optics.
Do not use more than finger force in tightening down the grating mounts, since this may cause damage to
the drive assembly
Optical
Wear powder-free gloves. Do not wear finger cots –hands should be completely covered. Do not touch
any optical surfaces - even if wearing gloves - since this is likely to cause irreparable damage. Do not
attempt to clean any optical surface except by blowing off dust or lint particles with a stream of dry clean
air or nitrogen. Do not allow condensation from talking or breathing to form on the grating. Gratings can
be scratched easily! Be very careful when removing the plastic grating covers. A cover for a grating must
never touch the grating’s front surface. The cover should only touch the edges of the grating. Customers
should keep the covers on hand to protect gratings during storage or transportation.
Figure 1: Grating Care and Handling

M77781A
MS257™USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
5
2 INTRODUCTION
The MS257 isn't just another monochromator. It is the heart of a completely automated spectral data
acquisition system. All you need is a PC and a detector system.
The MS257 is an F/3.9 instrument with a focal length of 257 mm for use as a monochromator, true flat
field spectrograph or imaging spectrograph. It incorporates the latest advances in optical design, high
speed wavelength drives, and total system automation.
The MS257 has been designed with a flat exit image plane and an oversized focusing mirror to serve as a
true flat field spectrograph. Adapter flanges are available for lnstaSpec™ diode arrays and CCD
detectors, as well as detectors made by other manufacturers.
The imaging version of MS257 has special corrected optics (toroidal mirrors) which correct the final image
for astigmatism and enable point to point spectral imaging of the input source or sources. The optics have
been designed to work with CCD detectors which are used to record simultaneous spectra from multiple
sources.
Key Features:
1, 2, 3, or 4 grating turret with automatic grating switching
Rapid high torque motor drive
Rigid housing for optical stability with sealed seams for light tightness
2 detector ports with automatic detector switching
Motorized slits for automatic bandpass selection
Advanced optical design results in negligible stray light
Tilted focal plane for eliminating re-entrant spectra from detectors
Corrected optics for spectral imaging (version 77782)
Fine focus adjustment for diode arrays and CCDs
Internal shutter for dark scans
Automated auxiliary input port option
Separate electronics compartmentfor exceptional temperature stability
On board microprocessor for automated control
Complete computer control via USB or RS232

M77781A
MS257™USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
6
3 SETUP AND MOUNTING
After unpacking, mount the MS257 in a convenient location, install the grating turret with gratings and
remove the covers from optics. After these steps have been completed, plug in the power cord.
*** WARNING ***
DO NOT PLUG IN THE POWER
CORD
UNTIL ALL THE SAFETY PRECAUTIONS HAVE BEEN READ.
3.1 MOUNTING MS257 TO A FLAT SURFACE
There are three 1/4-20 tapped holes under the housing, these can be used to screw in the
supplied adjustable feet or to mount to other objects. Please refer to Figure 2.
Figure 2: MS257
Dimensions

M77781A
MS257™USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
7
3.2 MOUNTING OTHER INSTRUMENTS TO THE MS257
Sources, detectors and other instruments that have an Oriel 1.5 inch (47 mm) female flange can
be easily attached to any of the MS257 slit assemblies at the ports. Other accessories can also
be mounted directly to MS257 at any of the input or output ports (Figure 4).
Figure 3: Input and Output Ports
Figure 4: Mounting Hole Pattern for
Ports

M77781A
MS257™USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
8
3.3 TURRET INSTALLATION
In order to protect the most sensitive part of the instrument during transportation, the grating
turret is packaged separatelyfrom the housing.
Install the turret into the instrument using the following procedure:
Quadruple Grating Turret (may have 2, 3 or 4 gratings installed)
Put gloves on to avoid fingerprinting the gratings.
Remove the MS257 cover.
Leave the protective cover on the gratings.
Make sure the grating turret cable is hanging freely at the side of the turret.
Locate the grating turret on the drive platform by aligning the two captive bolts with their
holes, and the center with the platform boss.
Adjust the position of the turret until it locates on the alignment pin and sits flush with the
platform.
Connect the turret cable.
Tighten the two mounting bolts by hand. Do not over tighten!
Remove the bottom and side protective grating covers, and lastly the upper grating cover.
For the bottom grating, let the plastic cover drop straight down and remove it horizontally
without touching or scraping the bottom grating surface.
Be very careful not to touch the gratings.
Replace the MS257 cover, using all cover screws.
Single Grating Turret
Remove the MS257 cover.
Leave the protective cover on the grating until the mount is screwed down.
Locate the grating mount and twist clockwise to correctlyalign it.
Tighten the mounting bolt by hand. Do not over tighten!
Remove the protective grating cover.
Be very careful not to touch the grating.
Replace the MS257 cover, using all cover screws.

M77781A
MS257™USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
9
4 QUICK START
4.1 WORKING WITH THE HAND CONTROLLER
The Hand Controller (Model 77709) controls the MS257 via an RJ11 jack located on the back
panel. Below the LCD screen are five LEDs that indicate the status of various functions. To
operate the MS257 with the hand controller, ensure that the following two LEDs are ON.
Power LED: The MS257 is powered up and the Hand Controller is connected and working
properly.
Local LED: When the Hand Controller has control of the MS257. To activate the LED, press
the "Local" button. The LCD screen will turn on and indicate the current status of the
instrument.
For further instructions on how to operate the instrument using the Hand Controller, please refer
to Section 7.3 of this manual.
4.2 WORKING WITH A COMPUTER
Connect the MS257 to the computer via the provided USB or RS232 cable, or an IEEE to
RS232 adapter (Model 77793).
Use the utility software (details are provided in Section 7.2) to control the instrument.

M77781A
MS257™USB/RS232
MONOCHROMATOR AND SPECTROGRAPH
10
5 INSTRUMENT DESCRIPTION
5.1 LAYOUT AND MAJOR FEATURES
Refer to the descriptions of the MS257 accessories throughout this manual for more information
on the items shown in Figure 5.
Figure 5: Monochromator Interior Layout