Optical pickup apparatus having a holographic optical element

Details Optical pickup apparatus having a holographic optical element Optical pickup apparatus having a holographic optical element

1996-12-30

1998-09-08

Hindi, Nabil

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369109, G11B 700

Patent

active

058055568

ABSTRACT:
An optical pickup apparatus for recording and reproducing information, which is manufactured to be extremely small in a hybrid type. The optical pickup apparatus includes a first holographic optical element as a beam expander for diffracting to enlarge a diverging angle of an incident beam emitted from a light source and a second holographic optical element as an object lens for diffracting the incident beam whose diverging angle is enlarged by the first holographic optical element to focus the incident beam on an optical disk. Here, the first holographic optical element has a function of a beam splitter for diffracting a reflected beam to be separated as well as a function of a beam expander. The optical pickup apparatus is manufactured to be extremely small and ultralight due to its short optical path. Therefore, the optical pickup apparatus is influential on the miniaturization of various optical information processing systems, and contributes to a stable operation and a high speed search due to its excellent optical performance.

REFERENCES:
patent: 562919 (1896-04-01), Hayashi et al.
patent: 4458980 (1984-07-01), Okki et al.
patent: 5180909 (1993-01-01), Ohyama et al.
patent: 5200939 (1993-04-01), Nishiwaki et al.
patent: 5204516 (1993-04-01), Upheap
patent: 5231620 (1993-07-01), Ohuchida
patent: 5272329 (1993-12-01), Nagahama et al.
patent: 5361244 (1994-11-01), Nakamura et al.
patent: 5416765 (1995-05-01), Aikoh et al.
patent: 5422870 (1995-06-01), Kojima et al.
patent: 5440427 (1995-08-01), Miyake et al.
patent: 5446719 (1995-08-01), Yoshida et al.
patent: 5481386 (1996-01-01), Shimano et al.
patent: 5523993 (1996-06-01), Freeman
patent: 5570333 (1996-10-01), Katayama
patent: 5583843 (1996-12-01), Horinouchi
patent: 5608695 (1997-03-01), Yamazaki et al.
patent: 5621716 (1997-04-01), Kojima et al.

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