Light emitting diode intensity tester

Details Light emitting diode intensity tester Light emitting diode intensity tester

1984-02-21

1986-09-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Housings

324158D, H01J 502

Patent

active

046111166

ABSTRACT:
A device that tests the output intensity of light emitting diodes. The light emitting diode to be tested is placed in a light tight tube in which is placed a photocell. The photocell is placed so as to be in contact with the diode. When power is applied to the diode by means of a direct current source, the diode emits light which strikes the photocell. This output light changes the output resistance of the photocell and is measured by a testing circuit to see if the signal strength falls in an acceptable range.

REFERENCES:
patent: 2933010 (1960-04-01), Vlahos
patent: 3617757 (1971-11-01), Burr et al.
patent: 3826574 (1974-07-01), Brown

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