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A study of large area image display by projection television was undertaken to evolve techniques of suitable image generation for astronautical flight simulation training. It was necessary to develop a technique to evaluate projected images. The display provided by the research apparatus, the close-circuit television system from an F-151 Fixed Gunnery Trainer, was evaluated; and performance characteristics of the 7WP4 performance in an ultra-high resolution television system revealed the tube to be unsuited to high resolution service. The projector in the F-151 television system was converted from a conventional 525-line system to a high resolution 1029line system. The 525-line format operated at 30 frames per second, with a horizonal scanning frequency of 15.75 kc and a vertical scanning frequency of 60 cps. In the 1029-line system, the frame rate and vertical scanning frequency were retained, but the horizontal scanning frequency was changed to 30.87 kc. The vertical sweep generator, sweep protection, and projection control circuits were duplicated; a video amplifier and horizontal sweep generator were developed; and volume of the control equipment was reduced from 144 to 32 cubic feet. Performance of the 7WP4 tube exceeded the prediction: limiting horizontal resolution is 650 to 700 lines with a well defined vertical raster. (Author).
A study of large area image display by projection television was undertaken to evolve techniques of suitable image generation for astronautical flight simulation training. It was necessary to develop a technique to evaluate projected images. The display provided by the research apparatus, the close-circuit television system from an F-151 Fixed Gunnery Trainer, was evaluated; and performance characteristics of the 7WP4 performance in an ultra-high resolution television system revealed the tube to be unsuited to high resolution service. The projector in the F-151 television system was converted from a conventional 525-line system to a high resolution 1029line system. The 525-line format operated at 30 frames per second, with a horizonal scanning frequency of 15.75 kc and a vertical scanning frequency of 60 cps. In the 1029-line system, the frame rate and vertical scanning frequency were retained, but the horizontal scanning frequency was changed to 30.87 kc. The vertical sweep generator, sweep protection, and projection control circuits were duplicated; a video amplifier and horizontal sweep generator were developed; and volume of the control equipment was reduced from 144 to 32 cubic feet. Performance of the 7WP4 tube exceeded the prediction: limiting horizontal resolution is 650 to 700 lines with a well defined vertical raster. (Author).
The purpose of this effort was to develop modifications on an SMK-23 Visual Simulator Attachment for determining the training value of various types of visual simulation system configurations. This report documents the required modifications to the SMK-23 television system to convert it from projected field sequential color operation to projected high resolution monochrome. Also documented is the replacement of the projection system with a high resolution monochrome lens-monitor system. A comparative evaluation of the original SMK-23 television system and the two modified display systems is presented. An improved SMK-23 model lighting system is described which enhances the television display contrast and yet uses only 20% of the original light power. (Author).
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).
Various techniques for modulation and scanning of coherent light are analyzed for application to the generation of high resolution high contrast displays for simulation. A number of possible techniques are discussed in the main body of the report. The individual discussions include a brief description of the princeiples of operation together with capabilities relative to bandwidth, contrast ratio, deflection angle, alignment, sensitivity, ease of fabrication, and handling. This is based somewhat upon voltage and power requirements over range of operation. (Author)
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.
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