Optical scanning lens, optical scanning device and image...

Details Optical scanning lens, optical scanning device and image... Optical scanning lens, optical scanning device and image...

2006-10-31

2006-10-31

Phan, James (Department: 2872)

Optical: systems and elements

Lens

With graded refractive index

C359S652000, C359S205100

Reexamination Certificate

active

07130130

ABSTRACT:
An optical scanning lens used in a scanning and imaging optical system in which a beam deflected by a light deflector is condensed on or in the vicinity of a surface to be scanned. The optical scanning lens is formed through plastic mold, and a distribution of the refractive indexes Δn(x) inside of the optical scanning lens has a local maximum within a range through which the beam passes through the lens.

REFERENCES:
patent: 5818621 (1998-10-01), Iizuka
patent: 6400391 (2002-06-01), Suhara et al.
patent: 8-136848 (1996-05-01), None
patent: 9-49976 (1997-02-01), None
patent: 11-44641 (1999-02-01), None

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