Method of and assembly for measuring equivalent sphere illuminat

Details Method of and assembly for measuring equivalent sphere illuminat Method of and assembly for measuring equivalent sphere illuminat

1976-02-20

1977-10-25

Evans, F. L.

Optics: measuring and testing

Photometers

Comparison

356256, G01J 110

Patent

active

040553833

ABSTRACT:
The measurement of equivalent sphere illumination on a given task located in a lighted area is disclosed herein. This is accomplished by comparing a movably mounted task in the lighted area with the same task in a control area illuminated with sphere illumination. The task is viewed alternatively in the two areas in accordance with specific optical procedures to determine the equivalent sphere illumination on the task in the lighted area.

REFERENCES:
patent: 3912399 (1975-10-01), Griffith et al.
Ngai et al. Journal of the Illuminating Engineering Society, vol. 5, No. 1, Oct. 1975, pp. 58-65.

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