Optical pick-up device with a multifunctional prism

Details Optical pick-up device with a multifunctional prism Optical pick-up device with a multifunctional prism

1994-02-04

1996-01-30

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 4414, 369 4423, 369110, 359837, G11B 7135

Patent

active

054885990

ABSTRACT:
The present invention provides an optical pickup device which enables cost reduction and has improved optical characteristics. In the optical pickup device according to the present invention, as a function to shape a light flux outputted from a semiconductor laser chip to a substantially circular beam and a function to separate reflected light from an optical recording medium from the source light are realized with one optical element, a number of required parts can be reduced, which in turn enables substantial cost reduction as well as size reduction of the device.

REFERENCES:
patent: 4770507 (1988-09-01), Arimoto et al.
patent: 5073888 (1991-12-01), Takahashi et al.
patent: 5220553 (1993-06-01), Ando et al.
patent: 5293372 (1994-03-01), Hoshino et al.
patent: 5331622 (1994-07-01), Ernst et al.

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