Accession Number : AD0734815

Title :   An Advanced Method of Measurement of Spot-Sizes of Very-High-Resolution Cathode-Ray Tubes.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Crost,Munsey E. ; Woolley,William R.

Report Date : OCT 1971

Pagination or Media Count : 23

Abstract : Several methods of measurement of spot-size of a very-high-resolution cathode-ray tube (CRT) are described, and their shortcomings or inconveniences are pointed out. An advanced method is described, combining the best features of the previous methods and circumventing their disadvantages. The method consists of dissection of the spot in two orthogonal dimensions by projection of a magnified circular trace scanned on the CRT phosphor upon two orthogonal pairs of parallel slits and reading the time-progression of the light-flux transmitted. The output is displayed upon an oscilloscope, and the separation of peaks in each pair is correlated with calibrated slit-separation. Optical and electronic apparatus for accomplishing the measurements is described. Examples of oscilloscope traces are shown, and their characteristics are interpreted. (Author)

Descriptors :   (*CATHODE RAY TUBES, TEST METHODS), CATHODE RAY TUBE SCREENS, ELECTRON BEAMS, RESOLUTION, MEASUREMENT

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE