Accession Number:

AD0639280

Title:

A RECORDING PHOTOMETER AND ITS USE IN STUDIES OF CATHODE RAY SCREEN DISPLAYS.

Descriptive Note:

Corporate Author:

JOHNS HOPKINS UNIV BALTIMORE MD

Report Date:

1946-01-01

Pagination or Media Count:

38.0

Abstract:

The design and construction details of a recording electronic photometer are presented. By virtue of its sensitivity, areal selectivity, rapidity of response, and recording capabilities, the instrument is peculiarly suited for measurements of the complex transient light patterns generated by radar indicators. However, applications can also be made to general photometric problems, including those which involve densitometric and contrast measurements. Examples of photometric data obtained with the device from a radar plan position indicator are given and explained. Some additional features of instrumental design, conceived largely through operational experiences, are suggested for an improved version. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE