Liquid Crystal Light Valve Color Projection System
The trend of research and development of liquid crystal light valve color projection system is presented, firstly. Then, the two types of projection systems developed in our laboratory are given. One of the systems is based on a high-brightness, highresolution, electrically addressed, reflectively reading CR.T-LCLV spatial light modulators (SLMs). The other employs three transmitting-readout si-TFTLCLVs. The design features of the two types of the projection systems are demonstrated and the performance of the systems are given. applications. A variety of liquid crystal color projection systems [11--[51 have been produced. In this paper, we demonstrate the main design features of the two 111 color projection systems developed in our laboratory. Firstly, the color projection system is based on three electrically addressed, reflectively readout cathode-ray tube-liquid crystal light valve(CRT-LCLV) made in our laboratory. Secondly, the color projection system employs a long lifetime xenon arc lamp to photoactivate three highbrightness, high-resolution, transmissively readout liquid crystal light valves(LCLVs). The main design features and the performance characteristics are presented.
New LCLV For Real-time Display Of Enlarged Electronic Images
Abs,tract - In recent years, a new CdS(Se)/CdTe solid state liquid crystal light valve(LCLV) coupled with a cathode ray tube(CRT) has been developed and its sample production has been started in our Optical Information Processing Lab. Coninected to a computer or a video camera, the CRT coupled LCLV spatial light modulator (CRT-LCLV SLM) can project a full-color image on screen up to 1 to 3 meter (in diagonal dimension). Display size and resolution can be varied electronically over a wide range. The device can also serve as an optical switch for high-bandwidth parallel processing optical computers. We have measured the imaging characteristics of the device and examined its availability as an electro-optical converter for an enlarged electronic image. The general configuration and main specifications, as well as the results of a series of experiments for the device, are given.
Influence of electric fields on friction electrification between metals and borosilicate glass
Abstract In a cylindrical geometry, electric fields were applied through the entire contact area between the sliding metal and the glass surface. The maximum electric charges developed on the metal were measured and plotted against the applied voltage producing the field. The metals were high-purity nickel and gold. The borosilicate glass was Pyrex, brand 7740. The experiments with nickel, which has a work function greater than that of the glass, were performed in 10 −7 mm Hg vacuum. The experiments with gold, with a work function smaller than that of glass, were carried out in air at atmospheric pressure. The results show that: 1. 1) There is both asymmetry and a reversed slope portion in the charge vs. voltage plot. 2. 2) For a certain range of reversing fields, the electric charge developed on the nickel is always negative and the charge on gold is always positive.