Optical head system with transparent contact member

Details Optical head system with transparent contact member Optical head system with transparent contact member

1989-10-10

1993-12-21

Shaw, Dale M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4418, 369 97, G11B 712

Patent

active

052726894

ABSTRACT:
An optical head device for projecting a light beam on a recording medium to record data thereon or reproduce the recorded data comprises an optical system for forming a beam spot of a specified diameter on the surface of the recording medium, and a transparent contact member disposed at a light emanating portion of the system for the recording medium to come into direct sliding contact therewith. Accordingly, when the contact member moves relative to the recording medium, the dust adhering to the surface of medium is removed by the contact member to assure a recording or reproduction operation free of errors.

REFERENCES:
patent: 3980811 (1976-09-01), Schaefer et al.
patent: 4023033 (1977-05-01), Bricot
patent: 4293944 (1981-10-01), Izumita
patent: 4551827 (1985-11-01), Custer et al.
patent: 4812016 (1989-03-01), Miyata et al.
patent: 4886959 (1989-12-01), Hoshi et al.
patent: 4907846 (1990-03-01), Tustison et al.
patent: 4970707 (1990-11-01), Hara et al.
patent: 4998239 (1991-03-01), Strandjord et al.
"Organic Non-Linear Materials For Optics" p. 24 Table 1.2.1 CMC Co. Jul. 25, 1985.

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