Chapter 5
Operation
67
Note that the Experiment Settings stack on the left now displays several expanders.
Because this is a new experiment, the default settings for the camera will be active.
The Status bar (at the bottom of the window) displays icons for temperature status
and orientation.
•
Temperature status reports the current temperature and whether the set
temperature has been reached. Clicking on the icon opens the Sensor expander
where the set temperature can be changed.
•
Orientation is displayed because the default readout port is Electron Multiplied.
Clicking on the icon pops a panel that describes how the image orientation was
corrected.
Focusing
The mounting hardware provides two degrees of freedom, focus and rotation. In this
context, focus means to physically move the camera back and forth through the focal
plane of the spectrograph. The approach taken is to slowly move the camera in and out
of focus and adjust for optimum while watching a live display on the monitor, followed
by rotating the camera and again adjusting for optimum. The following procedure,
which describes the focusing operation with a Teledyne Acton Research SP-2356
spectrograph, can be easily adapted to other spectrographs.
The following procedure assumes that the camera and spectrograph have already been
turned on and their icons have been dragged into the Experiment Devices area as
shown in
1. Click on the View tab, just above Experiment Devices, to change to the display area.
See
.
Figure 5-14: Typical LightField View Area
2. Mount a light source such as a mercury pen-ray type in front of the entrance slit of
the spectrograph. Any light source with line output can be used. Standard
fluorescent overhead lamps have good calibration lines as well. If there are no line
sources available, it is possible to use a broadband source such as tungsten for the
alignment. If this is the case, use a wavelength setting of 0.0 nm for alignment
purposes.
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Summary of Contents for ProEM Series
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