Optical scanner, image forming device, optical scanning method

Details Optical scanner, image forming device, optical scanning method Optical scanner, image forming device, optical scanning method

2011-01-11

2011-01-11

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S204100, C359S205100

Reexamination Certificate

active

07869111

ABSTRACT:
A technique capable of achieving reduction in space of allocating an optical system and improvement of an optical characteristic of a scan light in an optical scanner that scans a light flux from a light source on each of a photosensitive surface of a plurality of photoconductors in a main-scanning direction is provided.An optical scanner comprising: a polygon mirror80; a pre-deflection optical system7; and a post-deflection optical system A, wherein the post-deflection optical system A includes a common optical element having a smooth surface acting on all the light fluxes reflected and deflected by each of the plurality of reflecting surfaces in the polygon mirror80, the common optical element that applies power to the light flux reflected and deflected by the polygon mirror80and introduced to each of the plurality of photoconductors, so as to make the light flux introduced to the photosensitive surface by the post-deflection optical system A to have a predetermined optical characteristic on the photosensitive surface depending on an incident position of the light flux.

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