Silicon Liquid Crystal Light Valve for Flight Simulation Applications.
HUGHES RESEARCH LABS MALIBU CA
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The basic objective of this program has been to develop a silicon photoconductor liquid crystal light valve Si LCLV for application in wide-field-of-view simulators. The Si LCLV is expected to offer several advantages over the cadmium sulfide CdS photoconductor LCLV, including higher sensitivity, a significantly better switching ratio, higher resolution, and most importantly a fast response time to allow higher 60-Hz operation. The main thrust of this program was to upgrade the device in the following areas 1 Scale up to a 2-inch aperture device from a 1 cm x 1 cm active area. 2 Implement the siliconsilicon dioxide SiSiO2 dielectric mirror and improve the light blocking layer. 3 Upgrade device resolution by optimizing the focusing grid. 4 Increase the contrast ratio by improving silicon processing. 5 Implement the dc-biased guard ring to prevent edge breakdown. 6 Optimize liquid crystal operation to reduce the reponse time. Significant improvements were achieved in all areas.
- Electricity and Magnetism