Figure 5-16: Typical Lightfield Align Spectrometer View: Post-Adjustment - Teledyne ProEM Series System Manual

Chapter 5
7. Slowly move the camera in and out of focus. You should see the spectral line go
from broad to narrow and back to broad. Leave the camera set for the narrowest
achievable line. Note that the Peak Finding function is active for the center graph to
allow you to monitor the FWHM information to achieve the narrowest line width.
The way focusing is accomplished depends on the spectrograph, as follows:
•
•
•
8. Next adjust the rotation. Click on the peak you want to monitor during the
rotational alignment. This positions the large cursor to provide a vertical reference
line across all of the ROIs.
9. Rotate the camera while watching the live display of the lines until the selected
peak is aligned horizontally in all of the ROIs. Tighten the setscrews securing the
spectrograph adapter at the spectrograph. See

Figure 5-16: Typical LightField Align Spectrometer View: Post-Adjustment

Operation
Long focal-length spectrographs such as theTeledyne Acton Research SP-2356
The mounting adapter includes a tube that slides inside another tube to move
the camera in or out as required to achieve optimum focus.
Short focal-length spectrographs
There is generally a focusing mechanism on the spectrograph itself which,
when adjusted, will move the optics as required to achieve proper focus.
No focusing adjustment
If there is no focusing adjustment, either provided by the spectrograph or by the
mounting hardware, then the only recourse will be to adjust the spectrograph's
focusing mirror.
NOTE:
When aligning accessories (e.g., fibers, lenses, optical fiber
adapters,) first align the spectrograph to the slit. Then align
the accessory without disturbing the camera position. The
procedure is identical to that used to focus a spectrograph
(i.e., focus and align while watching a live image).
Figure 5-16.
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