270M
Rapid Scanning Imaging Spectrograph
If you wish
to
accurately check calibration, mount a photodetector at the exit, and
close the slits
to
13 microns and set the height limiter
to
1 mm. when you scan past
the spectral lines that your detector responds to, they should peak within +
/-
0.1
nm
of their indicated wavelengths, if you are using a 1200
g/mm
grating. For other
gratings, the tolerance scales inversely
to
g/mm.
Note that all calibration scans should
be made in the direction
of
increasing wavelength. When moving
to
shorter
wavelengths, overshoot
by
at least 10 nm with a 1200
g/mm
grating, {or 320 steps in
any case)
to
allow for backlash correction. Backlash correction is automatic with
HandScan, DM3000 QuikView, and AutoScan software. Refer
to
the calibration data
shipped with the instrument for the calibration plots that were run on your
spectrometer prior
to
shipment from the factory.
28
Revised
November 24.
1992
Leica Microsystems, Inc.'s Ex. 1033
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