Semiconductor laser device to detect a divided reflected light b

Details Semiconductor laser device to detect a divided reflected light b Semiconductor laser device to detect a divided reflected light b

1995-03-07

1996-10-22

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 13, 369122, 369 4423, G11B 713

Patent

active

055684637

ABSTRACT:
An optical device for detecting a magneto-optical signal can be simplified and miniaturized in arrangement. An optical device for detecting a magneto-optical signal includes an optical element in which a light-emitting portion and a light receiving portion are closely disposed on a common substrate and in which reflected-back light obtained from a magneto-optical medium after light from the light-emitting portion was reflected on the magneto-optical medium is detected at a position near confocal position by the light receiving portion and another light receiving element. The reflected-back light from the magneto-optical medium is divided. One reflected-back light is detected by the light receiving portion of the optical element 1 and the other reflected-back light is detected by another light receiving element.

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Ophey, W. G., "Compact Optical Light Paths", Jul. 5-9, 1993, pp. 12-13, Joint International Symposium on Optical Memory and Optical Data Storage 1993.

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