Optical recording and/or reproducing apparatus including a two p

Details Optical recording and/or reproducing apparatus including a two p Optical recording and/or reproducing apparatus including a two p

1994-10-04

1996-08-13

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, 369110, 369116, 359638, G11B 7135, G11B 1110

Patent

active

055463738

ABSTRACT:
An optical recording and/or reproducing apparatus comprises a light source, a beam splitter located between the light source and an optical recording medium, the beam splitter comprising a first prism and a second prism, a first photosensor for control of light quantity of the light source, and a second photosensor for reproduction of information from the recording medium. The first prism has a first face, a second face, a third face, and a fourth face while the second prism has a fifth face, a sixth face, and a seventh face. The fourth face and the seventh face of the prisms are bonded to each other. The first photosensor is arranged to receive a beam emitted from the light source, entering the first face, reflected by the third face, reflected by the fourth face, reflected by the first face, and then outgoing from the second face. The second photosensor is arranged to receive a beam emitted from the light source, entering the first face, reflected by the third face, passing through the fourth face, outgoing from the fifth face toward the optical recording medium, reflected by the optical recording medium to enter the fifth face, reflected by the seventh face, and then outgoing from the sixth face.

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