Frishauf, Holtz, Goodman & Woodward
Optical recording/reproducing apparatus
 An optical recording/reproducing apparatus has a beam emitting device adapted to emit at least two light beams in directions at a minute angle to each other. The light beams are condensed by a condensing member onto slightly separated two points on a disk and reflected by the disk. The light beams from the disk are polarized to a prism by a polarizing device. The prism refracts the light beams from the polarizing device, thereby increasing the relative angle between the light beams. The refracted light beams are converged by a converging lens on a detector. 
Olympus Optical Co., Ltd.
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Masaharu Nobuhide Kiichi
Sakamoto Matsubayashi Kato