Differential interferometer with improved cyclic nonlinearity

Details Differential interferometer with improved cyclic nonlinearity Differential interferometer with improved cyclic nonlinearity

2007-03-27

2007-03-27

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By light interference

Having polarization

C359S485050

Reexamination Certificate

active

10857053

ABSTRACT:
An interferometer system includes a plane mirror interferometer, a turning mirror, a retardation plate assembly having a retardation plate that can be adjusted and then fixed, and a retroreflector. A light beam travels in a path comprising the plane mirror interferometer, the turning mirror, the retardation plate assembly, and the retroreflector. The retardation plate assembly may include a plurality of bearings, a ring riding on the bearings, the retardation plate mounted to the ring, and a plunger pushing the ring against the bearings. The retardation plate may be fixed by adhesive after determining an orientation that produces little polarization leakage in the system.

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