Fig. 7.9. Spot diagrams for l-m//2.5 achromatic Schmidt camera at selected wavelengths and
field angles. Scale bar at the upper left is 2 arc-sec long. See Section 7.4 for the parameter values.
7.5. SOLID- AND SEMISOLID-SCHMIDT CAMERAS
A common use of the standard Schmidt camera is as the camera in a
spectrograph. In this appHcation different wavelengths are in focus at different
places on the focal surface, and it is no longer necessary tha
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