Fiber-optic luminescence measuring system for measuring light tr

Details Fiber-optic luminescence measuring system for measuring light tr Fiber-optic luminescence measuring system for measuring light tr

1984-03-23

1987-02-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231R, H01J 516

Patent

active

046441549

ABSTRACT:
A fiber-optic measuring device for measuring physical quantities, comprising a transducer unit and an electronic unit which are interconnected by means of at least one optic fiber. The measuring transducer unit comprises at least two photoluminescent elements, of which at least one is positioned in the ray path of light from the fiber, at least partly behind another element. The physical quantities to be measured are arranged to influence the light transmission between the photo-luminescent elements. The electronic unit includes at least two light sources having different emission spectra which are so chosen in relation to the absorption and transmission spectra of the photo-luminescent elements that one light source is arranged to excite substantially one of the photo-luminescent elements whereas the other light sources at least partly excite the other element or elements.

REFERENCES:
patent: 4270050 (1981-05-01), Brogardh
patent: 4493995 (1985-01-01), Adolfsson et al.
patent: 4523092 (1985-06-01), Nelson

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