NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login

Press Enter or click the Search button to begin your search.

Back to Results
Television camera video level control systemA video level control system is provided which generates a normalized video signal for a camera processing circuit. The video level control system includes a lens iris which provides a controlled light signal to a camera tube. The camera tube converts the light signal provided by the lens iris into electrical signals. A feedback circuit in response to the electrical signals generated by the camera tube, provides feedback signals to the lens iris and the camera tube. This assures that a normalized video signal is provided in a first illumination range. An automatic gain control loop, which is also responsive to the electrical signals generated by the camera tube 4, operates in tandem with the feedback circuit. This assures that the normalized video signal is maintained in a second illumination range.
Document ID
19850013117
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Kravitz, M. (RCA Princeton, N.J., United States)
Freedman, L. A. (RCA Princeton, N.J., United States)
Fredd, E. H. (RCA Princeton, N.J., United States)
Denef, D. E. (RCA Princeton, N.J., United States)
Date Acquired
August 12, 2013
Publication Date
January 22, 1985
Subject Category
Communications And Radar
Report/Patent Number
NAS 1.71:MSC-18578-1
Patent Number: US-PATENT-4,495,520
Report Number: NAS 1.71:MSC-18578-1
Patent Application Number: US-PATENT-APPL-SN-367132
Patent Number: NASA-CASE-MSC-18578-1
Accession Number
85N21427
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,495,520|NASA-CASE-MSC-18578-1
Patent Application
US-PATENT-APPL-SN-367132

Related Records

IDRelationTitleN82-27121Superseded By
No Preview Available