Parkhurst & Oliff
Information reproducing apparatus based on opto-magnetic effect
 An information reproducing apparatus for reproducing information recorded on a record medium based on an opto-magnetic effect is disclosed. A laser light source, a first polarizing beam splitter, a first Faraday element, a second polarizing beam splitter, an optical member having a second Faraday element or a rotatory polarizer, and first and second photodetectors, which elements are positioned along an optical axis in the described order. The angle between the polarizing axis of the first beam splitter and the polarizing axis of the second beam splitter is made .pi./4 and Faraday elements rotate the polarizing direction of the light beam therethrough. The first photodetector receives the laser beam reflected by the record medium and the second beam splitter and the second photodetector receives the laser beam reflected by the record medium, transmitted through the second beam splitter and reflected by the first beam splitter. 
Olympus Optical Company Limited
G G
G11B G11B
inventional inventional
Tuneo Kiichi
Yanagida Kato