Method for optically making a diffusion plate

Details Method for optically making a diffusion plate Method for optically making a diffusion plate

1979-12-20

1982-06-29

Corbin, John K.

350320, G02B 502

Patent

active

043369782

ABSTRACT:
A method for optically making a diffusion plate is disclosed which comprises the steps of illuminating a particular object, recording the light coming from the object on a recording material without imaging said object to form a speckle pattern thereon, and subjecting the recording material to a treatment process. The particular object used in the method is one which has a regular phase and/or amplitude structure in macroscopic view but contains an irregular phase and/or amplitude structure in a view of wavelength level of the light illuminating the object.

REFERENCES:
patent: 2726573 (1955-12-01), Maloff
patent: 3619021 (1971-11-01), Biedermann
patent: 3698810 (1972-10-01), Bestenreiner et al.
patent: 3708217 (1973-01-01), McMahon
Meyerhofer, D. "Holographic and Interferometric Viewing Screens", Applied Optics, vol. 12, No. 9, Sep. 1973.

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