Holographic method and apparatus for transformation of a light b

Details Holographic method and apparatus for transformation of a light b Holographic method and apparatus for transformation of a light b

1982-06-23

1984-04-24

Arnold, Bruce Y.

G02B 532

Patent

active

044444567

ABSTRACT:
Apparatus for producing a line source of a desired shape from a radiation source such as a laser comprising means for directing the radiation source along a predetermined path as a playback beam to impinge upon a hologram at a predetermined angle to produce a continuous self-luminous source of the desired shape. The hologram is recorded upon a substrate coated with a photosensitive material by interference between recording and object beams derived from the same source of coherent radiation. The recording beam is directed toward the substrate at an orientation and angle so that the playback beam is a conjugate of the recording beam. The object beam is directed to the substrate over a path which includes a diffuser plate covered with an opaque material in all areas except for a continuation area which defines the desired shape. The part of the object beam which impinges upon the substrate is limited by an aperture comprising a sector of an annulus which defines the numerical aperture of the radiation source.

REFERENCES:
patent: 3578845 (1971-05-01), Brooks
patent: 3630593 (1971-12-01), Bartelt
patent: 3652144 (1972-03-01), Vander Lugt
patent: 3708217 (1973-01-01), McMahon
patent: 4012150 (1977-03-01), Upatnieks
Smith, W. J., Modern Optical Engineering, p. 132, McGraw-Hill, New York, 1966.

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