Princeton Instruments NIRvana-LN, User Manual, Page: 46 / 122

46 NIRvana
™
-LN System Manual Issue 4
10.
Verify the spectrograph has an entrance slit shutter. An externally mounted shutter is
easily confirmed. Verifying an internally mounted shutter requires access to the inside
of the spectrograph. Refer to the spectrograph manual for instructions.
NOTE:
To obtain assistance, contact Customer Support. Refer to
Contact Information on page 120 for complete information.
5.5 Rotational Alignment
The detector mounting hardware provides two degrees of freedom:
•
Rotation;
Rotation is the physical rotation of the camera while watching a live display on the
monitor so that spectral lines will be perpendicular to the rows on the array.
• Focus.
Focus means to physically move the detector back and forth through the focal plane
of the spectrograph while watching a live display. The approach taken is to slowly
move the detector in and out of focus and adjust for optimum focus.
This section assumes:
• The detector and spectrograph have already been turned on and the appropriate
icons have been dragged into the
Experiment Devices
area as shown in Figure 5-3 .
•
Familiarity with the locations of the mounting plate, Micrometer Compartment, and
locking set screw on the IsoPlane. If unsure of these locations, refer to the IsoPlane
manual supplied with the spectrograph.
Perform the following procedure to rotationally align and focus a NIRvana-LN camera:
1.
Mount a light source such as a Princeton Instruments Hg and Ne/Ar Dual Switchable
light source in front of the entrance slit.
2. With the spectrograph properly connected to the computer, turn the power on, wait for
the spectrograph to initialize.
3.
With the NIRvana-LN mounted to the spectrograph and connected to the computer, turn
on the power and wait for the camera to initialize. If the camera is LN-cooled, the
Dewar should be filled while the camera is ON.
4.
Launch LightField and drag the icons for the NIRvana-LN and the IsoPlane into the
Experiment Devices area.
5. Open the Spectrometer expander. Select the appropriate grating and set the center
wavelength to 763.51 nm if using an NeAr light source.
6.
Set the slit to 25 µm. If necessary, adjust the
Exposure Time
to maintain optimum
(near full-scale) signal intensity.
7.
Wait until the camera locks at its default temperature.
NOTE:
It may be advantageous to change the
Shutter Control
setting
to
Disable Opened
for the following steps.