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Relative Position Error Sensor with Critical Angle Prism for Optical Drive

IP.com Disclosure Number: IPCOM000117910D
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31

Publishing Venue

IBM

Related People

Authors:
Hirasaka, Y Kimura, H [+details]

Abstract

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 an auto-collimator type package of detectors.