Optical read/write head low angle beamsplitter and coplanar dete

Details Optical read/write head low angle beamsplitter and coplanar dete Optical read/write head low angle beamsplitter and coplanar dete

1993-03-03

1995-08-22

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 4423, 369 4438, 369112, G11B 1100, G11B 700

Patent

active

054446775

ABSTRACT:
An optical read/write head for a magnetic-optic recording and reproducing unit having a beam splitter placed between a collimator lens and an objective lens. The optical path of the beam reflected by a recording disk is bent by the beam splitter and the beam strikes a polarizing beam splitter. The polarizing beam splitter splits the reflected beam into P and S polarized components whose optical axes form n angel of less than 90.degree.. The rays of the P and S polarized components strike respective light detecting elements and which are co-arranged on substantially the same surface.

REFERENCES:
patent: 5161139 (1992-11-01), Inoue et al.
patent: 5231620 (1993-07-01), Ohuchida
Patent Abstracts of Japan vol. 14, No. 50 (P-998)(3993) 30 Jan. 1990 & JP-A-12 79 445 (Sharp Corp.) 9 Nov. 1989 *abstract*.
Patent Abstracts of Japan vol. 14, No. 274 (P-1061)(4217) 13 Jun. 1990 & JP-A-27 9 241 (Hitachi Ltd) *abstract*.
Patent Abstracts of Japan vol. 6, No. 116 (P-125)(994) 29 Jun. 1982 & JP-A-57 44 241 (Matsushita Denki Sangyo K.K.) 12 Mar. 1982 *abstract*.
Patent Abstracts of Japan vol. 13, No. 54 (P-824) 8 Feb. 1989 & JP-A-63 244 346 (Matsushita Electric Ind Co Ltd) 11 Oct. 1988 *abstract*.

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