Apparatus for measuring light intensities

Details Apparatus for measuring light intensities Apparatus for measuring light intensities

1977-03-25

1979-10-23

Corbin, John K.

Optics: measuring and testing

For optical fiber or waveguide inspection

356435, 356436, 356448, G01N 2122

Patent

active

041719093

ABSTRACT:
Apparatus for measuring reflected or transmitted light is described. The apparatus comprises filter type spectrophotometer having a wavelength range of from about 200 nm (nanometers) to about 1,100 nm which includes a sample illuminating light source capable of producing an extremely intense light of short duration; light diffusing means; a light filter for transmission of a selected wave-length; at least two independent light sensing means; and separate means defining light transmission paths for the passage of light from the light source to one light sensing means and from the illuminated sample to the other light sensing means.
In a preferred embodiment the apparatus includes a light diffusing integrating sphere. In another embodiment, a replaceable or repositionable module can be used to convert the apparatus from reflectance to transmittance spectrophotomer.

REFERENCES:
patent: 2601182 (1952-06-01), Tyler
patent: 3327583 (1967-06-01), Vanderschmidt et al.
patent: 3490849 (1970-01-01), Hambleton
patent: 3746869 (1973-07-01), Lindstedt et al.
patent: 3792268 (1974-02-01), Bjerke et al.
patent: 3810696 (1974-05-01), Hutchins

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