Digital phase-shifting interferometer with an electrically addressed liquid-crystal spatial light modulator

2003 ◽  
Vol 28 (17) ◽  
pp. 1576 ◽  
Author(s):  
Youichi Bitou
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Phase Shifting ◽  
Light Modulator ◽  
Digital Phase

A New Method for Testing the Asphere Surface with a Liquid Crystal Spatial Light Modulator

2014 ◽  
Vol 599-601 ◽  
pp. 27-31
Author(s):  
Di Fan
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Phase Shifting ◽  
New Method ◽  
Light Modulator ◽  
Spherical Lens ◽  
Aspheric Mirror ◽  
On Line ◽  
Form Deviation ◽  
Carrier Phase Shifting

Due to the special properties of asphere lens, the testing of it is more difficult than that of spherical lens. In this paper, the development of a new method using the liquid crystal spatial light modulator (SLM) to measure the accuracy of an aspheric surface is presented. The surface form was measured using a new component as the compensator lens in conjunction to provide an interferogram representing the aspheric form deviation from the nominal. Interferograms are decoded using a spatial-carrier phase shifting technique. The interferometric data is compared to data obtained using a contact stylus profilometer. The system can be mounted over a polishing machine and used for on-line testing of aspheric mirror surfaces.

128 x 128 analog liquid crystal spatial light modulator

1995 ◽  
Author(s):  
Steven A. Serati ◽  
Gary D. Sharp ◽  
Roylnn A. Serati ◽  
Douglas J. McKnight ◽  
Jay E. Stockley
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator

Hyperresolving phase-only filters with an optically addressable liquid crystal spatial light modulator

Micron ◽  
2003 ◽  
Vol 34 (6-7) ◽  
pp. 327-332 ◽  
Author(s):  
J. McOrist ◽  
M.D. Sharma ◽  
C.J.R. Sheppard ◽  
E. West ◽  
K. Matsuda
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator
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