Optical scanner

Details Optical scanner Optical scanner

1990-01-19

1991-07-09

Arnold, Bruce Y.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250236, G02B 2608, H01J 314

Patent

active

050299565

ABSTRACT:
An optical scanner comprises a light source device; a linear image forming device for forming an approximately parallel light beam from the light source device as a linear image extending in a main scanning corresponding direction; a rotary polygon mirror having a deflection-reflecting face in the vicinity of the image forming position of the linear image; and an image forming optical system arranged between the rotary polygon mirror and a scanned face and setting the scanned face and a deflecting start point of the deflection-reflecting face in an approximately conjugate relation in geometrical optics with respect to a secondary scanning direction, the image forming optical system forming the deflected light beam from the deflection-reflecting face as an image of a light spot on the scanned face. The linear image forming device has a transparent elastic parallel plate, a cylindrical lens, a deforming device for flexing the elastic parallel plate in the shape of an arc by applying a deforming force thereto to change a radius of curvature of a face of the elastic parallel plate, and a controller for controlling the application of the deforming force in synchronization with an optically scanning operation by the deflected light beam. The linear image forming device may have other constructions.

REFERENCES:
patent: 4733064 (1988-03-01), Ishikawa
Japanese Patent Publication (KOKOKU) No. 1-15046, Mar. 15, 1989.
Japanese Patent Publication (KOKOKU) No. 1-15047, Mar. 15, 1989.
Japanese Patent Publication (KOKOKU) No. 1-14564, Mar. 13, 1989.

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