Recording and reproducing optical information device which conve

Details Recording and reproducing optical information device which conve Recording and reproducing optical information device which conve

1990-03-09

1991-06-18

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369122, 350170, G11B 700

Patent

active

050254383

ABSTRACT:
An apparatus for recording and reproducing optical information comprises a laser beam source for emitting a laser beam; a collimator lens for forming light emitted from the laser beam source as an approximately parallel light beam; an objective lens for converging the approximately parallel light beam from the collimator lens in the shape of a spot on a recording face of an optical information recording medium; a device for recording and reproducing the optical information by converging the laser beam in the shape of a spot by the objective lens on the recording face of the optical information recording medium; a prism symmetrically arranged with respect to an optical axis in an optical path from the collimator lens to the objective lens; and a device for making a parallel light beam from the collimator lens through the prism incident to the objective lens so as to provide a light intensity distribution in which the light intensity in a peripheral portion of the optical axis is larger than that on the optical axis.

REFERENCES:
patent: 3736046 (1973-05-01), Zook
patent: 4110607 (1978-08-01), Honjo et al.
patent: 4426696 (1984-01-01), Brendent et al.
patent: 4811328 (1985-05-01), Ito et al.
patent: 4949320 (1990-08-01), Furman et al.

Affiliated with

Also associated with

Rating

Recording and reproducing optical information device which conve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recording and reproducing optical information device which conve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recording and reproducing optical information device which conve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-149755