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Z-axis control loop for cathode-ray tubesInexpensive PIN diode detector samples screen brightness between camera frames generating error signal for feedback control of intensity. System was tested by taking flat-field exposures at several density levels over 4 hour period. Results showed processed film density levels varied by less than + or - 10 percent usually centering around + or - 8 percent.
Document ID
19780000305
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Ray, A. J., Jr. (Ball Bros. Res. Corp.)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Publication Information
Publication: NASA Tech Briefs
Volume: 3
Issue: 3
ISSN: 0145-319X
Subject Category
Electronic Components And Circuits
Report/Patent Number
NPO-13775
Accession Number
78B10305
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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