Abstract

A new type of Fabry-Perot spectrometer has been developed to achieve multichannel operation with recovery of the light that is lost in conventional systems. The light reflected from the interferometer is recycled in a predetermined way using small right angle prisms. When applied to nanosecond light pulses, the new system allows multichannel recording with a single detector. In this paper the realization of the instrument is presented. It has been tested in a prototype version with five channels. More than ten channels should be attainable. Some characteristic properties of the instrument are discussed.

© 1976 Optical Society of America

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