Teledyne ProEM Series System Manual page 60

60
4. In WinSpec/32, select Focus (on the Acquisition menu or on the Experiment Setup
dialog) to begin data accumulation. Data will be continuously acquired and
displayed but will not be stored until you stop acquisition and use the Save function
on the File menu.
5. 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. You may want to use the Focus Helper function (Process
Helper...) to determine the narrowest line width: it can automatically locate peaks
and generate a report on peak characteristics during live data acquisition (see the
WinSpec on line help for more information).
Note that the way focusing is accomplished depends on the spectrograph, as
follows:
•
•
•
6. Next adjust the rotation. You can do this by rotating the camera while watching a
live display of the line. The line will go from broad to narrow and back to broad.
Leave the camera rotation set for the narrowest achievable line.
Alternatively, take an image, display the horizontal and vertical cursor bars, and
compare the vertical bar to the line shape on the screen. Rotate the camera until
the line shape on the screen is parallel with the vertical bar.
ProEM System Manual
Long focal-length spectrographs
For example, the Teledyne 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 other accessories, such as 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 the
spectrograph (i.e., do the focus and alignment operations
while watching a live image).
Issue 3
►
Focus