Light beam scanning apparatus and image forming apparatus...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Reexamination Certificate

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C250S236000

Reexamination Certificate

active

07858923

ABSTRACT:
A light beam scanning apparatus capable of forming a high contrast electrostatic latent image. A polygon mirror scans a light flux emitted from a light source in a main scanning direction. An electrostatic latent image in an irradiation position irradiated by the scanned light flux is formed onto a photosensitive drum. An electro-optic crystal structure disposed in a light path between the light source and the polygon mirror deflects a course of the light flux emitted from the light source to the main scanning direction by applying a voltage. A controller maintains the irradiation position on the photosensitive drum irradiated by the light flux, by controlling a voltage to be applied to the electro-optic crystal structure according to the scanning information during the time period in which an electrostatic latent image corresponding to one dot is formed on the photosensitive drum.

REFERENCES:
patent: 3736046 (1973-05-01), Zook
patent: 3809806 (1974-05-01), Walker et al.
patent: 4378562 (1983-03-01), Oosaka et al.
patent: 4386827 (1983-06-01), Scifres et al.
patent: 5363126 (1994-11-01), Andrews
patent: 5541761 (1996-07-01), Shibaguchi
patent: 09-169136 (1997-06-01), None
patent: 2002-116395 (2002-04-01), None

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