Real-Time Optical Data Modulator
Abstract
Analysis of the performance characteristics of a laboratory model real-time thermoplastic optical data modulator was accomplished. Design of the modulator was performed in a previous program. Experimental data for bandwidth, dynamic range, spatial resolution and optical quality were obtained indicating a level of performance suitable for entry of wideband, high dynamic range data into a coherent optical processor or optical computer, or use of the modulator as a large screen display device. The thermoplastic modulator provides electron beam writing on a reusable deformable thermoplastic surface giving a two- dimensional optical phase recording which may be rapidly erased upon command. Data written on the plastic surface may be retained for arbitrary lengths of time down to a minimum of about 100 milliseconds, prior to erasure. A 70 MHz temporal bandwidth, 30 c/mm spatial bandwidth and a recording dynamic range of at least 40 db were realized. The experimental modulator system was designed in two configurations which differed mainly in the thermoplastic recording surface geometry.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1975
- Accession Number
- ADB005227
Entities
People
- C. Aleksoff
- C. Leonard
- G. Currie
- I. Cindrich
Organizations
- Environmental Research Institute of Michigan