Radiant energy – Radiant energy generation and sources – With radiation modifying member
Patent
1991-12-02
1993-04-27
Berman, Jack I.
Radiant energy
Radiant energy generation and sources
With radiation modifying member
2504921, 2504931, 2504941, G01N 1700
Patent
active
052065189
ABSTRACT:
A Weathering apparatus having a light source which irradiates onto specimens located in a specimen supporting wall which is located on a side of a test chamber. The output of the light source is controlled by independently adjustable control channels. Each of the control channels include a light source detector inserted into the test chamber, control circuitry, and ballasts connected to the light sources. The light sources are controlled by the control channels to deliver an output equivalent to a desired set-point. In order to disperse light in an even manner to the specimens, a barrier is provided which interferes in a predetermined pattern with the passage of light produced by the light sources. The apparatus includes a calibrating device which automatically transfers an irradiance signal from a reference detector selectively positioned immediately adjacent the light source detector. The calibration signal is sent to the controller where the re-calibration of a selected control channel is accomplished.
REFERENCES:
patent: 3576125 (1971-04-01), Kockott et al.
patent: 4544995 (1985-10-01), Suga
patent: 4665627 (1987-05-01), Wilde et al.
Advertising Brochure for Atlas Ci35 Fade-Ometer.RTM..
Advertising Brochure for Haraeus Xenotest.RTM. 1200 CPS.
Fedor Gregory R.
Grossman Douglas M.
Berman Jack I.
Q-Panel Company
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