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Published December 1, 1982 | public
Journal Article Open

A two-grating method for combined beam splitting and frequency shifting in a two-component laser-Doppler velocimeter

Abstract

The use of a rotating radial phase grating to carry out beam splitting and frequency shifting in a laser-Doppler velocimeter is briefly reviewed. This technique is not new. However, the present design adds a substantial new element by using two overlapping radial gratings to produce a two-channel system in which channel separation can be accomplished by electronic filtering of the signal from a single detector.

Additional Information

Copyright © 1982 American Institute of Physics. Received 22 June 1982; accepted 24 August 1982. The research described in this paper was supported by the National Science Foundation under Grant No. CME-7723541.

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