Optical pickup with a vertically movable aperture means

Details Optical pickup with a vertically movable aperture means Optical pickup with a vertically movable aperture means

1997-03-10

1999-02-02

Swann, Tod R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369 4424, 369 94, 369103, 369109, 369118, G11B 7135

Patent

active

058674683

ABSTRACT:
An optical pickup includes a light source, a light converging portion for converging a light emitted from the light source on the recording surface of an optical disk, a signal detecting portion for detecting a light reflected by the recording surface and converting this light into a specified electric signal, a first optical element, which is arranged between the light source and the light converging portion for forming a plurality of diffracted lights from the light emitted from the light source, and a second optical element, which is arranged between the light source and the light converging portion and in which an optical path for the light reflected by the recording surface of the optical disk and an optical path for the emitted light are different from each other. Thus, without increasing the weight of a movable portion and also without increasing the manufacturing costs of a condenser lens, reproducing is performed from a high density optical disk and a conventional low density optical disk, which are different in standard.

REFERENCES:
patent: 5625613 (1997-04-01), Kato et al.
patent: 5629919 (1997-05-01), Hayashi et al.
patent: 5638353 (1997-06-01), Takahashi
patent: 5644563 (1997-07-01), Yang
patent: 5657305 (1997-08-01), Sasaki et al.
patent: 5684779 (1997-11-01), Ohuchida et al.

Affiliated with

Also associated with

Rating

Optical pickup with a vertically movable aperture means does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical pickup with a vertically movable aperture means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup with a vertically movable aperture means will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1123936