Interferometric tracking device

Details Interferometric tracking device Interferometric tracking device

2008-03-28

2011-10-25

Connolly, Patrick J (Department: 2877)

Optics: measuring and testing

By light interference

Having wavefront division

Reexamination Certificate

active

08045178

ABSTRACT:
An interferometric tracking device is disclosed. A first grating is optically coupled to a second grading such that the second grating is rotationally offset from the first grating. Imaging optics are adapted to image light passing through the first and second gratings onto a focal plane array. A plurality of wedge plates are optically disposed between the imaging optics and the second grating, such that the wedge plates generate a plurality of spots on the FPA when light from a point source is incident upon the first grating.

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