摘要: The suitability of a low-cost liquid crystal television to function as a spatial light modulator for lasers is investigated along with an application of using such a modulator in an optical pre-processor for an electronic pattern ... 展开 The suitability of a low-cost liquid crystal television to function as a spatial light modulator for lasers is investigated along with an application of using such a modulator in an optical pre-processor for an electronic pattern recognition system. The particular pre-processor application investigated is that of optically enhancing the edges of an image. It was determined that the liquid crystal television could perform reasonably well as a spatial light modulator for applications where very high image quality was not required. Three different methods were found to produce recognizable edges of a given image: spatial filtering in the Fourier plane, image cancellation, and phase cancellation. The phase cancellation method was discovered during the course of the research. These methods were able to perform the edge enhancement task whether the image was binary as in a computer generated image, or was continuous as from a television camera. (Thesis). 收起