Optical pickup device

Details Optical pickup device Optical pickup device

1998-02-25

1999-06-29

Swann, Tod R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369116, G11B 700

Patent

active

059178019

ABSTRACT:
An optical pickup device which is mechanically simple and economical to shape waveforms of a laser beam, includes a light source for emitting the laser beam having a Gaussian light distribution, a beam splitter having an optical thin film coating surface which transmits the laser beam emitted from the light source at a constant light distribution, for shaping waveforms of the laser beam, a collimation lens for outputting a round shaped beam having a constant light distribution, from the transmitted laser beam of the beam splitter, and an object lens for focusing the round shaped beam from the collimation lens on an optical disk. The optical pickup device uniformly maintains light distribution of incident light which passed through the beam splitter using the optical thin film coating characteristic.

REFERENCES:
patent: 5701287 (1997-12-01), Hineno et al.

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