Volume holographic memory apparatus having a reference beam and

Details Volume holographic memory apparatus having a reference beam and Volume holographic memory apparatus having a reference beam and

1999-03-23

2000-07-11

Cabeca, John W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, 359 11, G03H 100, G11B 700

Patent

active

060883219

ABSTRACT:
A volume holographic memory-based optical information-recording/reproducing apparatus is capable of enhancing density of spatial multiple recording. A recording medium is mounted in the apparatus for recording a three-dimensional optical interference pattern formed by at least two coherent light beams as spatial changes in refractive index of the recording medium. A signal beam optical system supplies a coherent signal beam to the recording medium through a Fourier transform lens. A reference beam optical system supplies a coherent reference beam to the recording medium. The reference beam is caused to intersect with the signal beam within the recording medium and an angle of intersection between the reference beam and the signal beam is changed. Diffracted light of the reference beam diffracted from the recording medium is detected. Spatial beam modulating means is arranged in the optical path of the reference beam optical system for limiting light intensity of the reference beam in a manner such that a cross section of the reference beam in the recording medium has a light intensity distribution opposite to a light intensity distribution of the signal beam in the recording medium.

REFERENCES:
patent: 5291471 (1994-03-01), Russell
patent: 5339305 (1994-08-01), Curtis et al.
patent: 5438439 (1995-08-01), Mok et al.
patent: 5543251 (1996-08-01), Taylor
patent: 5696613 (1997-12-01), Redfield et al.
patent: 5777760 (1998-07-01), Hays et al.
patent: 5822090 (1998-10-01), Wilde
patent: 5859808 (1999-01-01), Campbell et al.
patent: 5914802 (1999-06-01), Stappaerts et al.
patent: 5920536 (1999-07-01), Campbell et al.

Affiliated with

Also associated with

Rating

Volume holographic memory apparatus having a reference beam and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Volume holographic memory apparatus having a reference beam and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Volume holographic memory apparatus having a reference beam and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-549070