OPTICAL PICKUP DEVICE

OPTICAL PICKUP DEVICE

PROBLEM TO BE SOLVED: To provide an optical pickup device that can be made thinner by using general purpose optical parts available on the market. SOLUTION: In the optical pickup device in which a laser beam emitted from a semiconductor laser (LD') is reflected by the reflection area of a riser...

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Hauptverfasser: SUGAWARA MASAYOSHI, SANPEI HIROSHI
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator SUGAWARA MASAYOSHI
SANPEI HIROSHI
description PROBLEM TO BE SOLVED: To provide an optical pickup device that can be made thinner by using general purpose optical parts available on the market. SOLUTION: In the optical pickup device in which a laser beam emitted from a semiconductor laser (LD') is reflected by the reflection area of a riser mirror (MIR') to be converged on the signal recording surface of an optical disk (Disc) by an objective lens(OL'), and in which the return light from the signal recording surface is reflected by the reflection area of the riser mirror (MIR') to be detected by a photodetector(PD); the riser mirror (MIR') is arranged so that the rising angle (θ') of its reflection area is less than 45 deg. to the lower face of the pickup of the optical pickup device, while the photodetector(PD) is arranged on the lower face of the pickup.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title OPTICAL PICKUP DEVICE
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