Optical apparatus for measuring the distance of an object and pr

Details Optical apparatus for measuring the distance of an object and pr Optical apparatus for measuring the distance of an object and pr

1997-12-22

2000-09-19

Font, Frank G.

Optics: measuring and testing

By polarized light examination

With light attenuation

356373, 356372, G01B 1114

Patent

active

061220612

ABSTRACT:
The present invention concerns an optical apparatus for measuring the distance of an object and characterized in that it comprises a case, a first converging lens housed in the case, a light source housed in the case and acting through the first converging lens to illuminate in a direction of illumination an object, a second converging lens housed in the case in a position such as to collect, in a direction angularly deviated with respect to the illumination direction, a light beam diffused by the illuminated object, detection means housed in the case in a position such as to collect the light beam diffused by the object illuminated and penetrating into the case through the second converging lens, with said light beam being collected on detection means from the second converging lens at a point of incidence having a position varying as a function of the distance of the object, with the detection means being capable of generating two electrical signals of different magnitude depending on the point of incidence of the diffused light beam coming from the object, and processing means for electrical signals generated by the detection means and capable of calculating a numerical value of the measured distance.

REFERENCES:
patent: 5113080 (1992-05-01), Leu et al.
patent: 5471050 (1995-11-01), Nishimoto et al.
patent: 5608211 (1997-03-01), Hirono et al.

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