THE DEVELOPMENT OF A PHOTOMEMORY
Abstract
THE DEMONSTRATION READING SYSTEM OF THE PHOTOMEMORY PERFORMED RELIABLY ON 0.006 IN WIDE BITS OVER A LIMITED PLATE AREA. SLIGHT IMPROVEMENTS IN THE ILLUMINATION SYSTEM WILL ENABLE THE DEMONSTRATION READER TO PERFORM RELIABLY ON A 2 X 2 IN DATA PLATE CONTAINING 0.004 IN WIDE BITS. THE RESULTS THUS FAR INDICATE THAT THE ULTIMATE DESIRE TO READ A 4 X 4 IN PLATE CONTAINING 09001 X 0.004 BITS IS FEASIBLE. FUTURE EFFORTS WILL BE DIRECTED TOWARDS THIS END. EFFORTS ON DEVELOPMENT OF THE PHOTOMEMORY WRITING SYSTEM WERE CONFINED TO SHOWING THE BASIC FEASIBILITY OF THE SCHEME AND SELECTING THE PROPER MATERIALS FOR FURTHER EXPERIMENTS. DATA WAS WRITTEN ON A FILM IN THE FORM OF BITS APPROXIMATELY 0.006 X 0.020 IN. THIS DATA WAS REPRODUCED FROM A TRACK OF THE DATA PLATE AT A RATE OF 20,000 BITS/SEC. WITH ONE MIRROR SCAN. MORE CONTRAST IN THE NEGATIVE AND SMALLER BITS ON THE PLATE ARE IMMEDIATE GOALS AND MAY BE ACHIEVED BY MORE EFFICIENT UTILIZATION OF THE WRITING LIGHT SOURCE. A PROTOTYPE PHOTOMEMORY IS ANTICIPATED AS THE RESULT OF FURTHER DEVELOPMENTS. A READING SYSTEM UTILIZING A LARGER PLATE AND SMALLER BITS AS WELL AS A PRELIMINARY WRITING SYSTEM WILL BE INCORPORATED IN THE PROTOTYPE
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 15, 1960
- Accession Number
- AD0248905
Entities
People
- Carl E. Jr. Nielsen