Use of solar illumination and baffles to calibrate visible...

Details Use of solar illumination and baffles to calibrate visible... Use of solar illumination and baffles to calibrate visible...

2007-10-01

2009-08-18

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S203400

Reexamination Certificate

active

07576346

ABSTRACT:
A device for calibrating a sensor using solar radiation includes a sensor configured to measure electromagnetic radiation received through a field of view (FOV) having a normal line of sight and at least two baffles removably insertable across the FOV of the sensor and inclined to the line of sight. Each baffle has first and second opposing surfaces, with the first surface disposed to face the solar radiation and the second surface disposed to face the sensor. One of the first or second surface is configured as a diffused surface, and the other of the first or second surface is configured as a specular surface.

REFERENCES:
patent: 4279240 (1981-07-01), Artusy
Pages 109-110 of Radiation Heat Transfer by E.M. Sparrow and C.D. Cess (Augmented Edition, Hemisphere Publishing Company, New York, 1978).

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