Miniature optical access head apparatus

Details Miniature optical access head apparatus Miniature optical access head apparatus

1996-12-27

1998-01-27

Hindi, Nabil

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369110, G11B 700

Patent

active

057128430

ABSTRACT:
A miniature optical head for optical disk drive units is disclosed. The head assembly comprises a polarization light-splitter means having a block-shaped body. A laser light source generates a laser light beam at a predetermined wavelength and illuminating into the block body of the polarization light-splitter means. A first quarter-wavelength light plate means arranged at a side surface of the block-shaped body of the polarizing light-splitter means is placed opposite the laser light source. A reflective diffraction grating arranged further external to the first quarter-wavelength light plate means is used for reflectively diffracting the laser light beam. A second quarter-wavelength light plate means is arranged to a surface of the block-shaped polarizing light-splitter means in a plane perpendicular to the first quarter-wavelength light plate means. A holographic optical element is arranged on a side surface of the block-shaped body opposite the second quarter-wavelength light plate means. A light sensor array is arranged further next to the holographic optical element along the path of the light beams returned by the surface of the optical disk being accessed, the returning light beams being received by the array for detecting data conveyed therein. The physical dimensioning of the optical head is suitable for head assembly miniaturization, the light energy involved in the data access operation is used without substantial loss and the light source is free from feedback noise.

REFERENCES:
patent: 5428588 (1995-06-01), Uhuchida

Affiliated with

Also associated with

Rating

Miniature optical access head apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Miniature optical access head apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Miniature optical access head apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-347680