Accession Number:

ADA280002

Title:

3-D Optical Memory Disk.

Descriptive Note:

Technical rept. 1 Jul 93-28 Feb 94,

Corporate Author:

CALIFORNIA INST OF TECH PASADENA DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

• Psaltis, Demetri

Report Date:

1994-04-22

Pagination or Media Count:

13.0

Abstract:

Recently, a new method of multiplexing holograms by rotating the material, or equivalently, the recording beams was invented. This method is called Peristropic Greek for rotation multiplexing and is briefly described. Peristropic multiplexing can be combined with other multiplexing methods to increase the storage density of holographic storage systems such as the previously reported 3-D disk. Peristropic multiplexing was experimentally demonstrating using DuPonts HRF-150 photopolymer film. A total of 395 holograms were multiplexed in the 38-micrometer thick photopolymer disk by combining peristropic multiplexing with angle multiplexing. In addition, it is shown that combining both angle and peristropic multiplexing the storage density of 3-D disks is greatly enhanced.

Descriptors:

• *OPTICAL DATA
• *MULTIPLEXING
• *ROTATION
• *HOLOGRAMS
• POLYMERS
• MEMORY DEVICES
• DISK RECORDING SYSTEMS
• THREE DIMENSIONAL
• DIFFRACTION
• PHOTOGRAPHIC FILM
• STORAGE

Subject Categories:

• Holography
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE