Scanning optical system

Details Scanning optical system Scanning optical system

1992-07-13

1993-08-03

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359209, 359820, G02B 2608, G02B 702

Patent

active

052334554

ABSTRACT:
A scanning optical system has a light source for emitting a light beam; a condenser lens for changing the light beam from the light source to a parallel light beam; a connection holding member for supporting the light source and the condenser lens; a deflector for deflecting an approximately parallel light beam transmitted from the condenser lens at an equiangular velocity; and a lens for optical scanning for scanning a scanned face at an approximately equal speed while converging the light beam deflected by the deflector and forming an image in the shape of a spot on the scanned face, the lens for optical scanning being formed by a plastic material for optics. This scanning optical system is constructed such that a coefficient of linear expansion of the connection holding member, a focal length of the condenser lens, a focal length, a refractive index and a coefficient of linear expansion of the lens for optical scanning, and a change in refractive index of the lens for optical scanning with respect to the change in environmental temperature satisfy a predetermined condition. Another condition using other parameters with respect to the lens optical system may be set.

REFERENCES:
patent: 4720168 (1988-01-01), Kaneko
patent: 4815059 (1989-03-01), Nakayama et al.
patent: 4855987 (1989-08-01), Versluis
patent: 4906061 (1990-03-01), Yamaguchi
patent: 4934772 (1990-06-01), Sakuma et al.
patent: 4955682 (1990-09-01), Yamaguchi
patent: 4962982 (1990-10-01), Takanashi
patent: 5005928 (1991-04-01), Suzuki et al.

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