Light exposure apparatus with cooling means

Details Light exposure apparatus with cooling means Light exposure apparatus with cooling means

1981-09-29

1985-08-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Temperature control of photocell

H01J 724

Patent

active

045352348

ABSTRACT:
Light exposure apparatus comprises a light source, a spectral filter perivious to light of a prescribed wavelength range, a glass member whose cut-off frequency in the prescribed wavelength range is variable with temperature, and a temperature control for controlling the temperature of the glass member. Intensity of the light from the light source, passing through the spectral filter and glass member, and impinging upon the surface subject to light-exposure is controlled by the temperature control.

REFERENCES:
patent: 3603827 (1971-09-01), Degawa et al.

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