An order sorter for high resolution spectrographs.
A simple, but versatile, order sorter for use with stigmatic plane grating spectrographs is described. The optical components can be interchanged easily to obtain the required separation between the orders. The properties of the dispersing materials are discussed, and a method for adjusting the order sorter is described.
van Rooyen
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National Physical Research Laboratory,CSIR, Pretoria, Republic of South Africa.