In-line optical pickup using Wollaston Prism and collimating len

Details In-line optical pickup using Wollaston Prism and collimating len In-line optical pickup using Wollaston Prism and collimating len

1996-02-29

1997-04-01

Young, W. R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369112, G11B 700

Patent

active

056173989

ABSTRACT:
An optical pickup includes a Wollaston prism for passing incident light generated from a light source and splitting reflected light from an optical disk into two polarized components, and two photodetectors for receiving the split reflected light beams, thereby simplifying and miniaturizing the apparatus.

REFERENCES:
patent: 4689479 (1987-08-01), Tatsuno et al.
patent: 4904856 (1990-02-01), Nagahama et al.
patent: 5050155 (1991-09-01), Kurata et al.
patent: 5172368 (1992-12-01), Lehureau
patent: 5189655 (1993-02-01), Ogata et al.
patent: 5202869 (1993-04-01), Miyake et al.
patent: 5258967 (1993-11-01), Strasser et al.

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