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  • 1
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    Unknown
    Automatic Exposure Iris Control (AEIC) for data acquisition camera (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A lens design capable of operating over a total range of f/1.4 to f/11.0 with through the lens light sensing is presented along with a system which compensates for ASA film speeds as well as shutter openings. The space shuttle camera system package is designed so that it can be assembled on the existing 16 mm DAC with a minimum of alteration to the camera.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-141884 , SPO-30284-00800
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Development of a drive system for a sequential space camera (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Breadboard models of single and dual motor drives for the shutter, claw and magazine of a space camera system were designed and tested. The single motor technique utilizes a single electronically commutated motor to drive the claw and shutter without resorting to a solenoid actuated clutch for pulse operation. Shutter speed is established by a combination of the cinemode speed and the opening of the conventional DAC two piece shutter. Pulse mode operation is obtained by applying power at a fixed clock rate and removing power at an appropriate point in the mechanical cycle such that the motor comes to rest by system friction. The dual motor approach utilizes a stepper motor to drive the shutter and an electronically commutated dc motor to drive the claw and magazine functions. The motors are synchronized electronically.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-147759 , SPO-30352-ADD
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Development of a drive system for a sequential space camera (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An electronically commutated dc motor is reported for driving the camera claw and magazine, and a stepper motor is described for driving the shutter with the two motors synchronized electrically. Subsequent tests on the breadboard positively proved the concept, but further development beyond this study should be done. The breadboard testing also established that the electronically commutated motor can control speed over a wide dynamic range, and has a high torque capability for accelerating loads. This performance suggested the possibility of eliminating the clutch from the system while retaining all of the other mechanical features of the DAC, if the requirement for independent shutter speeds and frame rates can be removed. Therefore, as a final step in the study, the breadboard shutter and shutter drive were returned to the original DAC configuration, while retaining the brushless dc motor drive.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-147535 , SPO-30352
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    Automatic exposure control for space sequential camera (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The final report for the automatic exposure control study for space sequential cameras, for the NASA Johnson Space Center is presented. The material is shown in the same sequence that the work was performed. The purpose of the automatic exposure control is to automatically control the lens iris as well as the camera shutter so that the subject is properly exposed on the film. A study of design approaches is presented. Analysis of the light range of the spectrum covered indicates that the practical range would be from approximately 20 to 6,000 foot-lamberts, or about nine f-stops. Observation of film available from space flights shows that optimum scene illumination is apparently not present in vehicle interior photography as well as in vehicle-to-vehicle situations. The evaluation test procedure for a breadboard, and the results, which provided information for the design of a brassboard are given.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-141885 , SPO-30284
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Unknown
    DC drive system for cine/pulse cameras (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Camera-drive functions are separated mechanically into two groups which are driven by two separate dc brushless motors. First motor, a 90 deg stepper, drives rotating shutter; second electronically commutated motor drives claw and film transport. Shutter is made of one piece but has two openings for slow and fast exposures.
    Keywords: PHYSICAL SCIENCES
    Type: MSC-16085 , NASA Tech Briefs (ISSN 0145-319X); 1; 4; P. 554
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Unknown
    Development of a drive system for a sequential space camera contract modification 4(S) (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The brush type dc motor and clutch were eliminated from the design of the 16 mm space sequential camera design and replaced by an electronically commutated motor. The new drive system reduces the current consumption at 24 fps to 220 mA. The drive can be programmed and controlled externally from the multipurpose programmable timer/intervalometer, as well as being controlled locally from the camera.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-151342 , SPO-30352
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Unknown
    Engineering design criteria for an image intensifier/image converter camera (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The design, display, and evaluation of an image intensifier/image converter camera which can be utilized in various requirements of spaceshuttle experiments are described. An image intensifier tube was utilized in combination with two brassboards as power supply and used for evaluation of night photography in the field. Pictures were obtained showing field details which would have been undistinguishable to the naked eye or to an ordinary camera.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-151112 , SPO-30348
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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