Color control system for optical image apparatus

Details Color control system for optical image apparatus Color control system for optical image apparatus

1974-08-01

1976-03-23

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

250205, 250226, 350162SF, 356190, G01J 350

Patent

active

039457311

ABSTRACT:
In an optical apparatus of the Fourier transform type employing a plurality of individual light sources arrayed about the optical axis of the apparatus, a control subsystem for all the light sources samples light from the light sources selectively. In the illustrated embodiment, a pellicle deflects a minor fraction of the source light to a spatial filter which passes a selected sample or samples to a group of spectrally filter photodiodes, which respond with currents that are fed to a photometric circuit and means to display measured quantities to an operator. The apparatus includes operator controllable means to adjust the intensity of each supervised light source independently of the others. A primary light source, from which the individual light sources are derived, is also supervised, to provide a basis for taking into account variations in energizing voltage, and dimming of the primary source with age.

REFERENCES:
patent: 3454775 (1969-07-01), Gibbs
patent: 3805065 (1974-04-01), Williams
Machine Design, Sept. 24, 1964, pp. 148 and 149.

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