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2.6 Cameras

Table 10 contains a summary of the characteristics of cameras 5 and 6. The resolutions, spectral coverages, and typical exposure times for different camera-grating combinations are summarized in table 15. This information may be used to help determine the proper camera for a particular observing project.


 

Table 10: Coudé spectrograph cameras


2.6.1 Camera 5

Camera 5 is a folded Schmidt design with the CCD dewar mounted behind the spherical mirror. Table 11 and table 12 list the projected decker sizes for stellar and comparison deckers.


 

Table 11: Spectrum widths for camera 5 -- decker plate 1


 

Table 12: Spectrum widths for camera 5 -- decker plate 2


2.6.2 Camera 6

Camera 6, the longest focal length camera, lies on the east side of the collimator beam and therefore requires the grating to be rotated 180 degrees about its normal. Specifications for camera 6 can be found in table 10 and projected decker sizes are listed in table 13 and table 14. Typical focus steps are 0.20 mm.


 

Table 13: Spectrum widths for camera 6 -- decker plate 1


 

Table 14: Spectrum widths for camera 6 -- decker plate 2


 

Table 15: Coude camera performance using CCDs


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