Optical measuring apparatus

Details Optical measuring apparatus Optical measuring apparatus

1986-03-18

1988-04-26

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

356 355, 356 43, 250227, G01B 902

Patent

active

047400811

ABSTRACT:
An optical sensor (1) is connected to an electro-optical transducer unit (35) and a measuring circuit (36) via an optical delay line (14) and an optical path (15). Error-free measurement values which are independent of the attenuation characteristics of the optical delay line (14) are obtained if the optical sensor (1) comprises a polarization splitter (3) which receives light pulses from the optical path (15) and from the optical delay line (14) and which is followed by a sensor body (2) which is traversed by the light pulses. A mirror (4) arranged on the side of the sensor body (2) on which the light is not incident reflects the light pulses back into the polarization splitter (3), which couples the light pulses back into the optical path (15) and the optical delay line (14).

REFERENCES:
patent: 3925727 (1975-12-01), Duguay
patent: 4025195 (1977-05-01), Ebersole et al.

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