G - Physics – 01 – N
Patent
G - Physics
01
N
73/51.5
G01N 21/17 (2006.01) G01D 5/26 (2006.01) G02B 6/42 (2006.01)
Patent
CA 1221556
- 16 - ABSTRACT OF THE DISCLOSURE 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 device is characterized in that the transducer unit comprises at least two photo- luminescent 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-lumin- escent 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.
450211
Brogardh Torgny
Hok Bertil
Ovren Christer
Asea Aktiebolag
Robic Robic & Associes/associates
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