Accession Number:

AD0623908

Title:

TEST AND EVALUATION OF ELECTRONIC IMAGE GENERATION AND PROJECTION DEVICES. VOLUME I. EVALUATION TECHNIQUE.

Descriptive Note:

Final rept., Jul 64-Jul 65,

Corporate Author:

SYSTEMS RESEARCH LABS INC DAYTON OHIO

Personal Author(s):

• Harshbarger,John H.

Report Date:

1965-08-01

Pagination or Media Count:

46.0

Abstract:

A method is described for evaluation of all types of displays in terms of resolution, brightness, and contrast ratio. The technique employs a television camera to replace human observation, and translates the characteristics of the display to measurable electronic waveforms. The waveforms are displayed on an oscilloscope where they may be analyzed directly and photographed, thus providing known standards of measurements in terms of electrical units rather than depending upon human judgment as a comparison standard. Direct evaluation may be applied to any display. The observer television camera furnishes data which are an expression of the display fidelity. Brightness is measured by a photometer. These terms are subsequently interrelated in an expression of the contrast ratio attainable at various resolution and brightness levels. The analytical evaluation, especially applicable to cathode ray tube CRT displays, obtains data through examination of the minute scanning spot as it traverses the image area. Analysis of the beam spot behavior enables one to predict the ultimate CRT capabilities without generating a complete display. Author

Descriptors:

• TRAINING
• ASTRONAUTICS
• BRIGHTNESS
• SCANNING
• TELEVISION SYSTEMS
• CATHODE RAY TUBES

Subject Categories:

• Humanities and History
• Electrooptical and Optoelectronic Devices
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE