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Relative Position Error Sensor with Dual Prism for Optical Drive Disclosure Number: IPCOM000117884D
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31

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Hirasaka, Y Shinagawa, T [+details]


Disclosed is a method for obtaining the relative error signal of a galvano mirror angle by using a differential signal created by the optical spots which are projected to the two detectors through dual prism.