Scanning optical system

Details Scanning optical system Scanning optical system

2005-12-13

2005-12-13

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S212100

Reexamination Certificate

active

06975441

ABSTRACT:
A scanning optical system has a scanning optical apparatus, which is provided with a laser diode, a collimating lens that collimates a laser beam emitted by the laser diode, a support member that holds and supports the laser diode and the collimating lens, a deflection member that dynamically deflects the laser beam collimated by the collimating lens in a main scanning direction, and a plastic scanning lens that converges the deflected laser beam onto a target surface. The scanning optical apparatus is configured to satisfy following conditions:10<ffc<20;and⁢⁢fc·nc>t>fc⁡(ncnc+1),where, f denotes a focal length of the scanning lens in the main scanning direction, fc denotes a focal length of the collimating lens, nc denotes a refractive index of the collimating lens, and t denotes a thickness of the collimating lens along an optical axis.

REFERENCES:
patent: 6195190 (2001-02-01), Tachibe et al.
patent: 6326992 (2001-12-01), Inoue et al.
patent: 6489982 (2002-12-01), Ishibe
patent: 59-15206 (1984-01-01), None
patent: 2736984 (1998-01-01), None

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