Hologram scanner and method of recording and reproducing hologra

Details Hologram scanner and method of recording and reproducing hologra Hologram scanner and method of recording and reproducing hologra

1990-12-21

1992-12-15

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 18, G02B 532

Patent

active

051722526

ABSTRACT:
A hologram scanner includes a reproducing light source for generating a collimated reproducing light beam, a hologram disk being adapted to rotate, and a hologram disposed on the hologram disk for deflecting the reproducing light beam by diffraction so as to scan an image surface by the deflected reproducing light beam during a rotation of the hologram disk. The hologram has interference fringes recorded by a mutual interference of an object light of divergent spherical wave and a reference light of divergent spherical wave. The object light is generated by an object light source positioned at a first position apart from a hologram recording plane of the hologram disk, on which the hologram is to be recorded, by a first distance. The reference light is generated by a reference light source positioned at a second position apart from the hologram recording plane by a second distance. The first and second distances are different from each other so that the deflected reproducing light beam is focused on the image surface.

REFERENCES:
patent: 4266846 (1981-05-01), Ih
patent: 4712852 (1987-12-01), Funato et al.
patent: 4768847 (1988-09-01), Iwaoka et al.
patent: 4923262 (1990-05-01), Clay
patent: 4925262 (1990-05-01), Yamagishi et al.
patent: 4948213 (1990-08-01), Hasegawa et al.
Japanese Patent Publication (KoKoKu) No. 61-5129, published on Feb. 15, 1986 (Japanese Patent Application Laying Open (KoKai) No. 54-104849, laid open on Aug. 17, 1979.
Japanese patent Application Laying Open (KoKai) No. 60-194419, laid open on Oct. 2, 1985.

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