Optical beam scanning system

Details Optical beam scanning system Optical beam scanning system

1989-10-25

1991-10-01

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359217, 359216, G02B 2608

Patent

active

050527673

ABSTRACT:
An optical beam scanning system is constructed with less optical elements. A light beam (B.sub.1) of parallel rays passes through a first image-forming system (L.sub.1). The first image-forming system consists of a cylindrical lens (2) having a refracting power in a direction equivalent to a main scanning direction (X) and a spherical convex lens (3). Focuses of the cylindrical lens and the spherical convex lens are within a prescribed allowance. A light beam (B.sub.11) passing through the spherical lens has a character of parallel rays within a vertical plane and a character of convergent rays within a horizontal plane to be focused on a deflection surface (4a). A reflected light beam (B.sub.2) is finally focused on a surface-to-be-scanned (8) through a second image-forming system (L.sub.2).

REFERENCES:
patent: 3944323 (1976-03-01), Starkweather
patent: 3995110 (1976-11-01), Starkweather
patent: 4408826 (1983-10-01), Ike

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