Optical distance measuring apparatus and method therefor

Details Optical distance measuring apparatus and method therefor Optical distance measuring apparatus and method therefor

1996-11-15

1998-08-25

Rosenberger, Richard A.

Optics: measuring and testing

By polarized light examination

With light attenuation

356 308, G01B 1102

Patent

active

057988366

ABSTRACT:
In a distance measuring apparatus, a plurality of line beams transmitted from a light source irradiate objects to form a plurality of images on the objects. Linear light sensors receive the plurality of images and generate a plurality of electric signals corresponding to the quantity of received light. A distance calculator portion carries out a product-sum operation using a predetermined function based on the plurality of electric signals, estimates a function to approximate a location of an image from a result of the product-sum operation, and calculates a distance to the object. Thus, the distance to the object can be measured at high speed and with high precision.

REFERENCES:
patent: 3671726 (1972-06-01), Kerr
patent: 4708483 (1987-11-01), Lorenz
patent: 5264791 (1993-11-01), Morizumi
Optics and Laser Technology, Feb. 1988, vol. 20, No. 1, pp. 19-24, P. Cielo et al., "Improvement of Subpixel Resolution in Triangulation . . . Imaging".
Measurement and Control, Dec. 1983, UK, vol. 16, No. 12, pp. 468-470, M. Fabian, "Optical Measurement Techniques Using Laser Diodes. II".

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