Abstract

The refractive image slicer, using small sapphire prisms as slicing elements, cuts off two side sections of a small image falling on the entrance slit. The central section, of width equal to the entrance slit-width, proceeds through the slicer. The cutoff left and right sections of width, equal to or less than the entrance slit, are reimaged above and below the central section and reflected so that the chief rays from each section are all parallel as they proceed to the collimator. The f/number of the relocated image sections is only slightly changed. Thus, for the restricted spectral band (1.115–1.136 μ), all of the energy falling on the slicer, of width three times that of the entrance slit, enters the spectrometer and yields a spectral resolving power as determined by the central section width and the exit slit-width.

© 1964 Optical Society of America

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