Scale for measuring dimension of article and scale to be used in

Details Scale for measuring dimension of article and scale to be used in Scale for measuring dimension of article and scale to be used in

1997-07-11

1999-08-03

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

With light attenuation

356397, G01B 1100

Patent

active

059332395

ABSTRACT:
A scale has marks of a point-symmetrical shape which are arranged in matrix. The scale and an article to be measured in dimension are positioned without any relative movement. An image sensor unit detects a predetermined portion of the article and the marks of the scale corresponding to the predetermined portion of the article selectively and successively, and the image sensor unit generates output signals in accordance with the detected results of the article and the scale. The output signals are processed to calculate the dimension of the article.

REFERENCES:
patent: 2650518 (1953-09-01), Jaroff et al.
patent: 4172662 (1979-10-01), Vogel
patent: 4269515 (1981-05-01), Altman
patent: 4393401 (1983-07-01), Gorenflo et al.

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