WRITING BINARY INFORMATION INTO OPTICAL STORAGES IN INFORMATION SYSTEMS,
Abstract
A survey of large-capacity optic memory systems is presented. These systems for storing binary information use the following data carriers: silver halide, Kal'var (a polyethylene teraphthalate layer 75 mu m thick), and thermoplastic and photochromic layers. Maximum resolution for these materials is 1000-2000 lines/mm, and storage duration is for years. Holographic laser systems are also cited. These use either of the above carriers, with writing speeds reaching 100,000 bits/sec., or 3-dimensional data carriers which are being closely studied by researchers, although it is not known whether data may be modified in this type of carrier. A Soviet contribution to the art of storing a large amount of data by optic mean, is the so-called raster photoscopic store, for which two patents were issued in 1961. The system uses a photographic plate and a lens raster to record an image (e.g., a punched card) on a section of film directly behind each lens of the lens raster.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 13, 1969
- Accession Number
- AD0698523
Entities
People
- L. I. Brodolin
Organizations
- National Air and Space Intelligence Center