FIELD: optical and mechanical industry. SUBSTANCE: device has 1/2 λ phase plate, and the second 1/4 l phase plate. These plates are connected in series after the first 1/4 l phase plate enabling to turn their optical axes in planes perpendicular to device optical axis. EFFECT: highly effective measuring. 1 dwg
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Authors
Dates
1995-02-27—Published
1990-10-16—Filed