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The purpose of this study was to develop evaluation techniques for visual simulation and to obtain an improved display for the SMK-23 Visual Simulator Attachment. In the past, evaluation techniques have been developed for television subsystems, but have not included the optical probe. This report documents techniques developed for the evaluation of the optical probe using the television camera as the measuring instrument. This permits the evaluation of the optical probe as it is actually used in the Visual Simulator. The evaluation includes resolution, depth of field, and flatness of field. To improve the picture quality of the SMK-23, different optical probes were evaluated and the sequential color television system was modified to 1029-line, high resolution monochrome television. In the original SMK-23, system performance is limited by the bead lens optical probe. This probe limits the resolution, depth of field, and flatness of field of the final display. Another optical probe overcomes these limitations and is recommended to replace the bead. The conversion of the SMK-23 to monochrome television greatly improves the resolution capabilities of the system, and also eliminates the color misregistration that is inherent in the original system. By using both the monochrome system and the adopted optical probe, the light available to the pickup tube is greatly increased. This permits the use of a less sensitive and less expensive image orthicon pickup tube and improves signal-to-noise ratio. (Author).
This paper documents a technique for assessing the spatial resolution of visual display systems like those currently used for flight simulation at the Air Force Research Laboratory (AFRL), Mesa, Arizona. The introduction defines spatial resolution, and how best to apply the concept in the context of visual display evaluation. The measurement technique is described in detail, as are the CCD-based light measurement device and the techniques developed to calibrate it. Typical spatial resolution data are presented for a variety of display systems. The various steps required for data analysis, and suggested methods for implementing these steps using standard applications programs are presented. The computer programs used to generate and display the test patterns and to estimate spatial resolution are described and are available from Defense Technical Information Center (DTIC).
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Hearings

United States. Congress. House. Committee on Science and Astronautics

Published: 1967

Total Pages: 1252


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Committee Serial No. 2. Considers H.R. 4450 and H.R. 6470, superseded by H.R. 10340, to provide FY68 authorizations for NASA RPD programs, including the Apollo Program, for construction of facilities at field centers, and for administrative operations.