Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Koichiro Tanaka0
Hirotada Oishi0
Date of Patent
August 16, 2011
0Patent Application Number
115838440
Date Filed
October 20, 2006
0Patent Primary Examiner
Patent abstract
A deflecting mirror which deflects a laser beam emitted from a laser oscillator, a transfer lens, a cylindrical lens array which divides the laser beam having passed through the transfer lens into a plurality of laser beams, and a condensing lens which superposes the laser beams formed in the cylindrical lens array are included. The following formula is satisfied: 1/f=1/(a+b)+1/c, when: “a” is a distance between an emission opening of the laser oscillator and the deflecting mirror; “b” is a distance between the deflecting mirror and the transfer lens; “c” is a distance between the transfer lens and an incidence plane of the cylindrical lens array; and “f” is a focal length of the transfer lens.
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