Optical: systems and elements – Lens – With light limiting or controlling means
Reexamination Certificate
2004-03-24
2008-12-16
Sugarman, Scott J (Department: 2873)
Optical: systems and elements
Lens
With light limiting or controlling means
C359S739000
Reexamination Certificate
active
07466498
ABSTRACT:
In an exposure device, a beam emitted from a light emitting point of a laser diode (LD) is limited by a slit. The slit limits a light beam in a direction orthogonal to an active layer of the LD. The exposure device has a moving mechanism which moves a plate in which the slit is provided, in a direction orthogonal to the plate. Object points are different at a beam and at flare light. Therefore, the plate is provided in a vicinity of the light emitting point in order to limit the light beam in the vicinity of the light emitting point, i.e., at a place near a point where a beam spot is smallest, and to be able to effectively block only the flare light.
REFERENCES:
patent: 11-58829 (1999-03-01), None
patent: 2001076370 (2001-03-01), None
Hayakawa Toshiro
Matsumoto Kenji
Morimoto Yoshinori
Saito Ken-ichi
FUJIFILM Corporation
Sugarman Scott J
Sughrue & Mion, PLLC
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