Holographic diffraction grating patterns and methods for creatin

Details Holographic diffraction grating patterns and methods for creatin Holographic diffraction grating patterns and methods for creatin

1990-07-12

1994-03-01

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 22, 359 30, 359567, 359572, 359575, G02B 518, G02B 532, G03H 126

Patent

active

052913171

ABSTRACT:
Methods for creating a plurality of holographic diffraction grating patterns in a raster scan fashion. In accordance with the method, the desired pattern is made up of a large plurality of individual spots, each spot comprising a holographic diffraction grating of a predetermined grating spacing and angular orientation for that spot. Variation of the angular orientation and/or grating spacing between spots and/or groups of spots provide the desired holographic effect. The spot locations may vary as desired, including locations drawing out a desired pattern, and two-dimensional orthogonal matrices in which a pattern is drawn by variations between spots or group of spots as in a raster scan type image. Various embodiments and methods for creating the same are disclosed.

REFERENCES:
patent: 3567561 (1971-03-01), Wood
patent: 3947105 (1976-03-01), Smith
patent: 4036552 (1977-07-01), Lee et al.
patent: 4455061 (1984-06-01), Case
patent: 4547037 (1985-10-01), Case
patent: 4568141 (1986-02-01), Antes
patent: 5032003 (1991-07-01), Antes
patent: 5056880 (1991-10-01), Barbanell
patent: 5058992 (1991-10-01), Takahashi

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