Apparatus for measuring light

Details Apparatus for measuring light Apparatus for measuring light

1982-09-07

1985-02-12

Evans, F. L.

Optics: measuring and testing

Lamp beam direction or pattern

250237R, 250578, G01J 106

Patent

active

044987676

ABSTRACT:
A light sensor 10 includes two parallel, spaced mask plates 12, 14. A first mask plate 12 has nine, small, spaced holes 38a-i which are in alignment with corresponding holes 36a-i in the second mask plate 14. The light sensor 10 includes a base plate 18 having nine holes 22a-i into which photosensitive devices 26a-i are positioned and the base plate 18 is secured to the outer surface of the second mask plate 14. The photodiodes 26a-i are connected to an indicating means 32 which provides an indication of the light falling upon each photodiode 26a-i individually or upon all of the photodiodes 26a-i collectively.

REFERENCES:
patent: 2439295 (1948-04-01), Hammond et al.
patent: 3435246 (1969-03-01), Webb

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