Sensor for the contactless linear measurement of the distance of

Details Sensor for the contactless linear measurement of the distance of Sensor for the contactless linear measurement of the distance of

1987-04-24

1989-04-18

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

G01B 1114

Patent

active

048221708

ABSTRACT:
Sensor for the contact free linear measurement by backscattered radiation of the distance (d) between the sensor and a possibly moving target, comprising a light emitter supplying to the target a light beam, means for determining the distance (d) by referring to curve I=f(d) translating the relationship between distance (d) and the backscattered intensity, wherein the means for analysing the intensity (I) of the backscattered light are constituted by two adjacent, parallel receivers which are spaced from the emitter and from one another, so that the second parts of the graphs of their law I.sub.1 =f.sub.1 (d) and I.sub.2 =f.sub.2 (d) are outside one another.

REFERENCES:
patent: 3327584 (1967-06-01), Kissinger
patent: 3771873 (1973-11-01), Tourret
patent: 3784309 (1974-01-01), Brelot et al.
patent: 4484069 (1984-11-01), Brenholdt

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