Liquid crystal modulator including a diffuser with plural phase shifting regions
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United States of America Patent
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Jul 6, 1993
Grant Date -
N/A
app pub date -
Apr 4, 1991
filing date -
Apr 6, 1990
priority date (Note) -
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Abstract
Light emitted from a coherent light source undergoes fine adjustment of its polarizing direction by a polarizing device and is directed to a liquid crystal device through a collimating optical system. The polarizing device is capable of fine-adjusting the polarizing direction in accordance with the wavelength of the incident light, thereby providing a high contrast ratio. When an image is recorded by holography using such a liquid crystal spacial light modulator, it is possible to obtain an image of high quality.
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