Prism for an optical pickup of an optical recording and reproduc

Details Prism for an optical pickup of an optical recording and reproduc Prism for an optical pickup of an optical recording and reproduc

1994-04-12

1995-12-19

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369110, 369 4437, 369 4412, G11B 7135

Patent

active

054775213

ABSTRACT:
An optical pickup for a magneto-optical disc has a prism for transmitting light reflected on the magneto-optical disc to a detector. The prism comprises a triangular portion, a plate portion, and a polarizing film interposed between the triangular portion and the plate portion for splitting the light to a first polarized component and a second polarized component. The refractive index of the plate portion is larger than the refractive index of the triangular portion. Thus, the first polarized component passing the plate portion reflects at a point on a rear surface of the plate portion near the second polarized component.

REFERENCES:
patent: 4505584 (1985-03-01), Kato et al.
patent: 5150350 (1992-09-01), Aikoh et al.
patent: 5151889 (1992-09-01), Saimi et al.

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