Phase shifting device with selectively activated grating generat

Details Phase shifting device with selectively activated grating generat Phase shifting device with selectively activated grating generat

1995-02-27

1996-12-03

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

25055922, 250237G, G01B 1124

Patent

active

055813526

ABSTRACT:
The invention provides a device for shifting the phase of a projected grating by use of a grating generator comprising one or more clear substrates having a plurality of equally-spaced, equal width bands of liquid crystal. The liquid crystal bands are selectively activated to modulate, that is, to shift, the phase of the projection of the grating on a test surface.

REFERENCES:
patent: 4641972 (1987-02-01), Halioua et al.
patent: 4837732 (1989-06-01), Brandestini et al.
patent: 4984893 (1991-01-01), Lange
patent: 5175601 (1992-12-01), Fitts
patent: 5450204 (1995-09-01), Shigeyama et al.

Affiliated with

Also associated with

Rating

Phase shifting device with selectively activated grating generat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase shifting device with selectively activated grating generat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase shifting device with selectively activated grating generat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-789672