Optical beam scanning apparatus

Details Optical beam scanning apparatus Optical beam scanning apparatus

1992-11-06

1994-03-15

Lerner, Martin

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 18, 359 19, G02B 532, G02B 2610

Patent

active

052950042

ABSTRACT:
An optical beam scanning apparatus includes one rotatable hologram which is rotatable about an axis, and at least two laser beam sources which emit laser beams. The rotatable hologram is provided with at least two hologram areas whose number corresponds to the number of the laser beam sources, so that the laser beams emitted from the respective laser beam sources are made incident upon the respective hologram areas. Each of the hologram areas is provided with a plurality of hologram facets which are concentrically arranged with respect to the axis of rotation of the rotatable hologram to emit laser beams of the same F number. The hologram areas having different numbers of hologram facets having different F numbers.

REFERENCES:
patent: 4165464 (1979-08-01), Ikeda et al.
patent: 4415224 (1983-11-01), Dickson
patent: 4505537 (1985-03-01), Funato
patent: 4600266 (1986-07-01), Omi
patent: 4678263 (1987-07-01), Funato

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