Binary phase modulation properties of a programmable liquid-crystal television display

Programmable color liquid-crystal television spatial light modulator: transmittance properties and application to speckle-correlation displacement measurement

Drive electronics developed for a color liquid-crystal television (LCTV) display enable data to be written onto individual pixels. Display transmittance characteristics obtained with the new and the original TV drive electronics are compared. The enhanced performance obtained through this development has some potential for spatial light modulator applications in color, optical information processing based on the low-cost LCTV. As an example, we describe a novel, to our knowledge, speckle metrology technique used to display fringes and to output correlation peaks resulting from in-plane object displacement. This requires only a single LC display to encode, simultaneously in three pixel colors, speckle and fringe patterns for real-time measurements. Relative merits of this technique, including displacement range and temporal resolution, are discussed.

Gray characteristics of a color liquid-crystal television in the beam of a He-Ne laser

Systems of coherent optics with cheaper spatial light modulators are discussed. The aim is toward the behavior differences of the color components of a color liquid-crystal television (CLCTV) screen illuminated by a He-Ne laser (633 nm) and white light. Several conclusions have been derived about (1) the summary effects of numerous components, (2) the response of single components, (3) the comparison of conversion from color to gray between laser and white light, and (4) the approach of encoding and addressing a CLCTV.