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.
Performance Of Laser-Addressed Liquid Crystal Map Overlay Display
The requirements for a military map overlay display and the decision to use a projected laser addressed liquid crystal are outlined. The design and construction of the display is described with an emphasis on recently implemented improvements. Key parameters of the display's performance are presented.
Effects of Equipment Dimensions on Liquid Mixing Time of Bubble Column with Draft Tube
The liquid mixing time of a bubble column with a draft tube is experimentally studied. The diameter and height of the column, the diameter and length of the draft tube, and the mode of sparging gas were changed and the liquid mixing time was measured.The lengths of bottom and top clearances have significant effects on the liquid mixing time. The liquid mixing time increases with increasing column aspect ratio of height to diameter. The liquid mixing time of the bubble column with a draft tube is longer than that of a standard bubble column when the column aspect ratio is relatively high. The liquid mixing time has a minimum when the diameter ratio of draft tube to column is 0.5 to 0.6. These effects of equipment dimensions are expressed by an equation. In the experiment using different solutions, the liquid mixing time becomes shorter with increasing liquid surface tension, or with increasing liquid viscosity.