Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1987-10-23
1989-08-15
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250343, 356217, 356323, G01J 342
Patent
active
048577359
ABSTRACT:
A spectrophotometer incorporating a pulsed light emitting diode as a source of radiation. The light emitting diode emits substantially monochromatic light thus negating the need for a separate wavelength control. The spectrophotometer may incorporate a pair of light emitting diodes for performing bichromatic spectrophotometric determinations. The light emitting diodes are pulsed with a duty cycle and pulse amplitude such that it is possible to obtain a higher amplitude pulse than the light emitting diode could sustain at a continuous voltage input level. Continuous voltages at this level would damage the light emitting diode.
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Howell Janice A.
Rauchholz William F.
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