Technique uses phase-shift networks at optical and baseband frequencies and, as such, is optical adaptation of previously-existing microwave technology. Application is planned for wind-tunnel velocity measurements. Alternative configuration produces finite fringes that move in one direction or other as measured particle approaches or recedes.
Directional laser velocimeter with doppler velocity simulator
NASA Tech Briefs ; 3 , 1
1978-06-01
Miscellaneous
No indication
English
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