Holographic recording apparatus having a liquid crystal modulato

Details Holographic recording apparatus having a liquid crystal modulato Holographic recording apparatus having a liquid crystal modulato

1993-02-10

1994-05-31

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 74, 359 9, 359 35, G02F 11335

Patent

active

053174356

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.

REFERENCES:
patent: 3736047 (1973-05-01), Gelber et al.
patent: 4505547 (1985-03-01), Sekimura et al.
patent: 4715686 (1987-12-01), Iwashita et al.
patent: 5046827 (1991-09-01), Frost et al.
patent: 5124815 (1992-06-01), Chang
patent: 5148302 (1992-09-01), Nagano et al.
patent: 5225920 (1993-07-01), Kasazumi et al.
Fourney et al., "Recording Polarization effects via Holography", J. Opt. Soc. Am. vol. 58, May 1968, pp. 701-702.

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