Optical scanning device and imaging apparatus implementing...

Details Optical scanning device and imaging apparatus implementing... Optical scanning device and imaging apparatus implementing...

2006-05-23

2006-05-23

Dunn, Drew A. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

By moving a reflective element

C359S196100, C359S197100, C347S233000, C347S259000

Reexamination Certificate

active

07050210

ABSTRACT:
An optical scanning device, including a resin lens having a power that is an inverse power of scanning lens placed before a deflector. A bundle of rays emitted from a plurality of light sources is coupled into a desired state by coupling lens, after which the bundle of rays is incident on the resin lens. The surface of incidence of the resin lens has a spherical surface with a negative power, and the exit surface of this resin lens has a cylindircal surface with a negative power only in the sub scanning direction. The bundle of rays passes through the resin lens and enters a glass toroidal lens. A light deflector deflects the bundle of rays from the toroidal lens. The deflected bundle of rays is incident on a third optical system that condenses the deflected bundle of rays onto a surface to be scanned.

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