Second harmonics generating optical recording layer

Details Second harmonics generating optical recording layer Second harmonics generating optical recording layer

1993-08-16

1995-10-03

Sugarman, Scott J.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369288, 369112, G11B 726

Patent

active

054558174

ABSTRACT:
A reflective film is formed over a recording surface of an optical disk on which pits are formed. The reflective film is made of a non-linear optical material which, when light is incident thereon, generates second harmonics of the incident light. In a reproduction optical system for reproducing this optical disk, when a reading beam reflected by the reflective film of the optical disk impinges on a filter for filtering out the basic wave of the reading beam, the filter only transmits the second harmonics which are then incident on a light receiver. Since information signals recorded on an optical disk is reproduced by reading only second harmonics of the reflected beam, the cut-off spatial frequency of the OTF can be made twice higher as compared with a conventional reproducing apparatus. In other words, the recording density of the recording medium can be made higher.

REFERENCES:
patent: 4946261 (1990-08-01), Yaegashi et al.
patent: 4971426 (1990-11-01), Schildkraut et al.
patent: 5204178 (1993-04-01), Licht et al.
Japan Applied Physics Society, Optical Integral Circuit, Bases and Application, 1988.
Yariv, Introduction to optical Electronics, 3rd Edition pp. 250-271, 1985.

Affiliated with

Also associated with

Rating

Second harmonics generating optical recording layer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Second harmonics generating optical recording layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Second harmonics generating optical recording layer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1081959