Brookhaven BI-200SM User manual

BI-200SM Goniometer Photo Alignment Manual
September 2018
To be used as a supplement to the “BI-200SM Goniometer Instruction Manual Ver. 2.0”
Brookhaven Instruments Corporation
750 Blue Point Road
Holtsville, New York 11742 U.S.A
Tel: [phone]
Fax: [phone]
E-mail: in[email protected]
This alignment manual is meant to be used in
conjunction with the “BI-200SM Goniometer
Instruction Manual Ver. 2.0” and training by a
goniometer service technician.
Refer to Page “4-2” in the “Goniometer Instruction
Manual” as a reference for many of the names of
parts on the goniometer system.
Ver.20172711DC
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Top & Side View of Assembled Goniometer
1. Laser rail and mounts, optional 12A. Lens adjustment, horizontal
2. Precision-machined base 12B. Lens adjustment, vertical
3. Turntable 13A. Slit adjustment, horizontal
4. Rigid rotating arm 13B. Slit adjustment, vertical
5. Upright for 2mm alignment aperture 14. Mirror adjustment
6. Detector rail 15. Eyepiece
7A,B. Center rotation adjustment screws 16. Pinhole wheel
7C. Center of rotation locking screw 17. Filter wheel
8. Center of rotation adjustment table 18. Detector
9. Beam focusing and steering lens 19. Angle adjustment (fine adjustment knob)
10. Sample cell assembly 20. Clutch release
11. Beam Stop

Goal: to have a fully aligned goniometer system, as shown.
A Goniometer right out of the box.
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Place goniometer on the optical table. Center the four holes on the
base of the goniometer above four holes on the optical table.
•Place the laser rail
foot (LRF) on the
table
•If using a 0.5 meter
rail place LRF near
end of rail, as
shown
•If using longer rail
place LRF 1/3 of
the way from the
end of the rail
•Finger tighten
screws to hold the
LRF and
goniometer to the
optical table
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Step 1
Step 2

Slide the laser rail in place and position it. The laser rail can be
even with the LRF or up to 5 mm past the LRF. Tighten the laser
rail in place with the two clamping screws on both laser rail feet.
Tighten the screws completely so that the laser rail will not move
out of place.
After the laser rail is in place and tightened down,
tighten the six screws that hold the goniometer and
laser rail foot to the table. Completely tighten each
screw to ensure the instrument can not be moved out
of place.
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Step 3
Step 4

Look at the goniometer from underneath; there is a small
gap. This is the “X-Y” Table. This must be centered where
the gap is evenly spaced between it and the stainless steel
plate.
Place the 6 mm alignment pins in the gap to
determine if the “X-Y” table is centered. If
the pins do not all fit evenly adjustments to
the table need to be made.
If you do not have pins, an M5 hex key will
work. It should fit evenly all around the
gap.
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Step 5
Step 6

To adjust the “X-Y” Table loosen “7C” and make slight adjustments to
“7A” and “7B” until the alignment pins fit evenly all around in the gap.
They do not need to all be tight or all loose, they just need to all fit the
same way then lock down “7C” again. When locking down "7C", the
table will shift a little so take that into account when making the slight
adjustments.
Place the black
metal pot into the
delrin base.
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Step 7
Step 8

Slightly rotate the black metal pot in place so that knob
“7A” is centered between the two black temperature
control nozzles, located on the back of the black metal
pot, when the goniometer is viewed from the top.
Use the 2 mm alignment pins to center the black metal pot within the
delrin base. Using 3 of the 4 can make it easier to insert. Insert the
tapered ends of the pins in to the gap between the black metal pot and
the delrin base. Gently tighten the three set screws located around the
delrin base to lock the black metal pot in place. The pins should all fit
evenly in the gap.
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Step 9
Step 10

When the three set screws around the delrin base
are tightened down, ensure that knob “7A” is still
centered between the two black temperature
control nozzles.
Remove the 2mm aperture upright
opposite the laser rail and attach the
detector rail
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Step 11
Step 12

Attach the detector rail using the two M6x25 flat
head screws that are supplied.
Unlock the detector arm by unscrewing the clutch
release. Rotate the detector arm 180 degrees then
re-tighten the clutch release. Center the detector
arm above the laser rail (as seen in the photo). This
is accomplished by making slight turns of the fine
adjustment knob and viewing the detector arm and
laser rail from multiple angles to determine if it is
centered above the laser rail. Another way: line up
detached detector arm with motor base.
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Step 13
Step 14

After centering the detector rail above the laser rail, you
may have to reset the angular scale to reflect the new zero
angle. Unlock the sliding scale by using a 2mm hex key
on the recessed set screw at the opening at 175 degrees.
Slide the scale so that it now reads 180 degrees. Tighten
the set screw once the zero angle is aligned to 180
degrees.
Rotate the detector arm back to zero degrees and ensure that
the angular scale reads zero degrees perfectly. Lock the
detector arm in place by tightening the clutch release knob.
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Step 15
Step 16

Reset the fine adjustment knob. Unlock the knob by
loosening the set screw and turn the knob so that the
zero matches up with the tick mark. Tighten the set
screw when finished.
Place the Mini-L40 on the laser rail. Set the
laser near the far edge of the laser rail. The
left edge of the Mini-L40 should be about
even with the left end of the laser rail. (if
using a HeNe or Argon-Ion laser, ensure
that the front of the laser is approximately
13 inches (33 cm) from the foot of the
detector rail, such that it will not interfere
with the rotating detector arm.) Lock the
laser in place using the knobs on the feet of
the laser mounts. Ensure that the knobs are
tight and the laser can not move out of
place.
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Step 17
Step 18

Everything needed to adjust the laser beam position is located on the Mini-L40
mount. The rectangular table with four slots the Mini-L40 is attached to is the
horizontal adjustment. The two brass knobs on the laser mount are the vertical
adjustments.
⚠Make sure there are no reflective surfaces in the path of the laser beam!
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Remove the detector rail and replace it with the 2 mm aperture
upright. Insert 2 mm pinholes into both aperture uprights then tighten
down with locking screws. Adjust both the vertical and horizontal
adjustments on the Mini-L40 so that you can pass the laser beam
cleanly through both 2 mm pinholes which are placed in the
aperture uprights.
Step 19
Step 20

Loosen the two locking screws on either side of each brass knob on
the Mini L-40 Mounts. Rotate the knobs to adjust the vertical
position of the laser beam. Ensure that the knobs are rotated
simultaneously to prevent the platform from locking up or
becoming uneven. Re-tighten locking screws when complete.
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To adjust the laser beam horizontally, loosen the four
screws around the rectangular table. Do not remove
them. Slide the table back and forth until the beam is in
position (next slide). Ensure that the screws in the slots
are close to the center, not pushed all the way to one
side.
Incorrectly Positioned Laser Correctly Positioned Laser
Step 21
Step 22

The laser beam should be centered both horizontally and vertically on
the First 2 mm Pinhole. When it reaches the Second 2 mm Pinhole it will
be a round shape. Center the beam on the Second 2 mm Pinhole. There
should be no bright spots on the face of the Second 2 mm pinhole; the
laser beam should pass cleanly through the hole. Once complete, tighten
all screws, alternating.
Once this is done, rotate the goniometer 180 degrees and ensure that the
laser passes cleanly through the backside of both pinholes.
After the laser is aligned through the two pinholes, lock the vertical and
horizontal adjustments in place on the Mini-L40 with their respective
locking screws. Check by moving laser to see that is secure.
After the beam passes through both 2 mm pinholes, you should see a
laser image on the wall. Place one of the targets found at the back of this
manual (your preference) on the wall and center the target on the laser
image.
Make sure the laser is tightened down completely: place your hands on the laser and try to move
it back and forth. If there is any play, continue to tighten the locking screws. It should not move if
completely tightened.
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Step 23
Step 24

Carefully place alignment needle in the brass manifold. Lower the alignment needle into the
path of the beam. The beam should hit the tip of the needle without any obstructions. If the
beam is hitting the tip of the needle, an "X" should appear on the target. Be sure to slowly
lower the needle into the path of the beam. If the needle is lowered too quickly, the laser
beam will be completely obscured.
If you are seeing the "X" on the target, this means that the laser is aligned perfectly. If
you encounter any issues going forward, which may force you to go back and realign
the system, you will not have to check the alignment of the laser itself.
Remove both 2 mm pinholes. Fit the brass manifold over the black
metal pot and screw it in place with the three M4x25 flathead screws
which are supplied.
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Step 25
Step 26

Using a ruler, measure 113 mm (4.495 in) from the center of
the vertical adjustment on the steering lens to the center of
the alignment needle. Tighten the steering lens assembly in
place using the four set screws on its base.
Use a 1.5 mm hex key and position
it around the gap between the round
lens and the lens holder. The allen
key must fit evenly all around. This
is achieved by making slight
adjustments with the vertical and
horizontal adjustment knobs on the
steering lens assembly.
If need to clean lens of dust/fingerprints,
use a lens pen or lens paper gently. May
also use pure methanol only if needed, no
other solvents.
The steering lens must be centered in its
holder.
Place the steering lens in its holder. Fit the brass manifold
over the black metal pot and screw it in place with the three
M4x25 flathead screws which are supplied.
Place the steering lens in its holder
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Step 27
Step 28
Step 29

Unlock “7C” and gently turn the sample cell table. Rotate the sample cell table until the
tip of the alignment needle is perfectly centered over the laser beam. This should be
only a small turn of the table. The laser image on the wall becomes obstructed when
the needle is lowered down. Rotate the sample cell table while raising and lowering the
needle until it appears that the needle tip is directly touching the laser beam. This will
appear as another "X". Then lock “7C”. Be sure not to adjust knobs “7A” and “7B”
while rotating the sample cell table.
Remove the steering lens. Lower the alignment needle once more into
the path of the beam. The beam should hit the tip of the needle
without any obstructions. If the beam is hitting the tip of the needle,
an "X" should appear on the target. Be sure to slowly lower the
needle into the path of the beam. If the needle is lowered too quickly,
then the laser beam will be completely obscured.
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Step 30
Step 31

Remove the alignment needle, the brass manifold and the steering lens
assembly. Place the vat in to the black metal pot. The flat face of the vat
should be facing the laser. Fill the vat with 100 m/ of Decalin. Place a 2
mm pinhole in the upright nearest the laser and tighten down with
locking screw. Rotate the vat in the black metal pot as well as slide it
forward and back such that the back reflection of the laser is centered on
the 2 mm pinhole and the vat is as centered as best as possible in the vat
holder.
Rotate the vat in the black metal pot such that the back reflection is
centered on the 2 mm pinhole.
*The back reflection may not pass directly through the pinhole. As long as it is
horizontally centered about the pinhole and the vat is fully seated in the black metal
pot, you can proceed.*
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Step 32
Step 33