Device for measuring light transmitted through a material

Details Device for measuring light transmitted through a material Device for measuring light transmitted through a material

1976-11-02

1978-11-07

Corbin, John K.

Optics: measuring and testing

For light transmission or absorption

250573, 356434, 356442, G01N 2124

Patent

active

041243013

ABSTRACT:
In a device for measuring the transmitting or absorbing properties of a material at ultra-violet, visible or infra-red frequencies, the light source is operated in a flash mode, a signal is derived related to the light from the source received by a detector after passing through the material, and a biased manual switch is connected so that a display related to the derived signal is provided only while the switch is held closed. When the light source used is an incandescent lamp, a temperature sensor is provided to activate the processing and display circuitry when the filament lamp reaches a predetermined operating temperature.

REFERENCES:
patent: 3437822 (1969-04-01), Fitzsimmons
patent: 3463927 (1969-08-01), Allington
patent: 3489906 (1970-01-01), Beer
patent: 3528749 (1970-09-01), Bowker
patent: 3901600 (1975-08-01), Johnson et al.
patent: 4003662 (1977-01-01), Retzer et al.

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