THE DEVELOPMENT OF A HEAD-MOUNTED VIDICON EYE MOTION RECORDER.
Abstract
Limitations of previous corneal reflex eye motion recorders are discussed. Requirements of new recorder are defined as (a) plus or minus 1 degree accuracy, (b) easily reduced data, (c) minimum restraint on subject, (d) binocular vision, (e) reliable and repeatable measurements, (f) recording time of at least 10 minutes. Evaluation of two breadboards led to final design incorporating following features: filtered light source, two electrostatically deflected vidicon cameras, electronic mixing of scene and eye spots, real-time direct viewing on video monitor, data recorded on video tape, head-mounted weight of approximately 3-1/2 pounds, new type of dental fitting. Electronics portion of eye recorder used FET input stage for optimum signal-to-noise ratio. An optional peaking circuit is provided to produce an output only when input signal exceeds a preset threshold. Standard commercial equipment, modified as necessary, is used for the camera control unit, video monitor, and video recorder. The system meets all design specifications, giving sensitivity comparable to the fastest photographic films, horizontal resolution of 500 lines, adequate noise level, and excellent linearity. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1968
- Accession Number
- AD0828588
Entities
People
- David H. Ziegler
- Jonathan J. Stinehelfer