15 Discovery Way, Acton, MA 01720
Phone: (978)263-3584, Fax: (978)263-5086
Web Site: www.princetoninstruments.com
Operating Instructions
for the
IARC-446-070
Raman Filter Chamber
Rev 29.06.09
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Operating Instructions for IARC-446-070 Raman Filter Chamber
Mounting the IARC-446-070 to Acton Series Monochromators or
Spectrographs:
Refer to Figure 3 when mounting the IARC-446-070 to Acton series monochromators or spectrographs.
1. Unpack the IARC-446-070 Raman Filter Chamber.
2. Using the 3/32” Hex wrench provided, remove the cover of the IARC-446-070.
3. Position the IARC-446-070 against the ENTRANCE SLIT of the Acton Series monochromator or
spectrograph as shown Figure 3. Align the mounting holes of the IARC-446-070 with the tapped holes in
the slit assembly.
4. Insert the four (4) 8-32 screws provided through the mounting holes and into the tapped holes of the slit
assembly. Tighten to secure the IARC-446-070 to the entrance slit.
5. The IARC-446-070 is now mounted to the Acton Series monochromator or spectrograph.
6. If there is a filter already mounted in the filter holder, re-install the cover. If a filter installation is
necessary, continue to Step 2 of the next procedure and make the installation before closing up the
chamber.
Figure 3. IARC-446-070 Layout (Top View)
Mounting a Filter inside the IARC-446-070:
Refer to Figure 4 on page 3 and the Filter Holder Assembly drawing on page 4 when completing these steps.
The standard filter holder inside the IARC-446-070 accepts 1.0” (25.4 mm) diameter filters. Use the following
procedure to mount filters:
1. Remove the IARC-446-070 access cover.
2. After loosening the two captive screws securing the filter holder, remove the filter holder from the
chamber.
3. Using the .050” Hex Wrench provided, loosen the set screw on the top of the filter holder and slide the
filter adapter out.
4. If installing a 1.750” outside diameter filter/filter assembly, proceed to Step 6. If installing a 1.0” outside
diameter filter proceed to Step 5.
5. Remove one of the retaining rings from the adapter. Install the filter/filter assembly. Replace the
retaining ring and tighten. Use care not to cause any damage to the filter when tightening the set screw.
6. Install the filter/filter assembly into the filter holder and tighten with the set screw.
7. Re-install the filter holder tightening the two captive screws.
8. Replace the access cover.
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Operating Instructions for IARC-446-070 Raman Filter Chamber
Filter Holder
Figure 4. Close up view of the Sample Holder inside the 1ARC-446-070
Optimizing the IARC-446-070 for Best Performance
Lens Focus:
The IARC-446-070 is optimized for best performance when the light source image is in sharp focus on the
monochromator or spectrograph entrance slit. This can be accomplished using the following procedure:
1. Make sure that the IARC-446-070 is correctly mounted to the monochromator or spectrograph.
2. Mount the detection system to the monochromator or spectrograph. Verify that the detection system is
operating.
3. Position the edge or notch filter to normal incidence and illuminate the system with the laser line the filter
is designed to block. Visually inspect that the filter is blocking the laser line to a point which is
undetectable by the unaided eye before proceeding. Adjust the angle of the filter if needed.
4. Set the monochromator or spectrograph to a central wavelength corresponding to that of the laser line.
5. Operate the system and continuously monitor for intensity. Adjust the angle of the filter until the
intensity of the laser line is observable yet below the detector saturation level. Slowly adjust the focusing
lens until highest intensity is achieved.
6. When operating the IARC-446-070 with multiple light source inputs (a multi-leg fiber optic bundle, for
example), an imaging spectrograph, and a CCD detection system, it is recommended that the detection
system be operated in an imaging mode and the focus be adjusted until the best image quality of the
source(s) is achieved.
7. Finally, adjust the angle of the filter until a minimum in laser intensity is observed.
*NOTE: The collimating lens position is set at the factory and no further adjustment is necessary.
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Operating Instructions for IARC-446-070 Raman Filter Chamber
4
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Operating Instructions for IARC-446-070 Raman Filter Chamber
5
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