Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2007-02-16
2010-11-02
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S209100, C250S234000
Reexamination Certificate
active
07826117
ABSTRACT:
An attachment lens is arranged in a stage subsequent to a scanning lens. After a laser beam is converged by the scanning lens, the laser beam is converted into a parallel beam by the attachment lens. When the scanning lens is displaced in a direction perpendicular to an optical axis of the laser beam, a traveling direction of the laser beam is bent by a predetermined angle immediately after the laser beam passes through the scanning lens. Then, the traveling direction of the laser beam is further bent by a predetermined angle in the same direction by the passage of the laser beam through the attachment lens. Accordingly, a final swing angle of the laser beam outgoing from an outgoing window is increased by a swing angle imparted by the attachment lens compared with the case where the attachment lens is not arranged. One of lens surfaces of the attachment lens is formed in a toroidal surface, which allows the laser beam to have a long outline in a vertical direction.
REFERENCES:
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Japanese Office Action for corresponding JP Application No. 2006-058578, May 26, 1926, Japan.
Suzuki Yoshihisa
Yamada Masato
Ditthavong Mori & Steiner, P.C.
Phan James
Sanyo Electric Co,. Ltd.
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