Apparatus and method for detecting the presence of a discontinui

Details Apparatus and method for detecting the presence of a discontinui Apparatus and method for detecting the presence of a discontinui

1991-03-20

1992-09-01

Howell, Janice A.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356445, G01N 2186

Patent

active

051441519

ABSTRACT:
The present invention is directed to an apparatus and method for detecting the presence or absence of a discontinuity on a glass surface. The apparatus includes a transmitting means for directing and receiving infrared electromagnetic radiation relative to the glass surface, a positioning means for positioning the transmitting means in a fixed angular and distance relation with respect to the glass surface, and a sensing means for determining the relative magnitude of the received radiation, the magnitude being indicative of the presence or absence of a discontinuity. The apparatus may be translated relative to the glass surface to detect discontinuities therealong.

REFERENCES:
patent: 3807870 (1974-04-01), Kalman
patent: 3892492 (1975-07-01), Eichenberger
patent: 3906232 (1975-09-01), Meihofer
patent: 4044250 (1977-08-01), Fetzer
patent: 4091368 (1978-05-01), Schwartz
patent: 4139307 (1979-02-01), Clarke
patent: 4754148 (1988-06-01), Barkowski et al.
patent: 4857749 (1989-08-01), McCarty

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