Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takashi Fukuhara0
Koichiro Nishikawa0
Date of Patent
July 15, 2008
Patent Application Number
11561066
Date Filed
November 17, 2006
Patent Primary Examiner
Patent abstract
The recording medium 12 is radiated with light beam from the second light source to obtain servo signal from the reflected light. At least one of the relay lenses 8 in the relay optical system is moved perpendicularly to the optical axis according to the servo signal to follow-up moving direction of the recording medium. The light beam from the second laser light source merges with an optical system from the first laser light source to the recording medium 12 between at least one of the relay lenses 8 and the spatial light modulator 3.
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