04715709 is referenced by 25 patents and cites 2 patents.

A method for detecting flaws in a surface of an inspected object can moderate the requirements for inspection condition accuracy, particular for adjustment of spatial relationships among a laser unit, the surface and an laser detector unit. The method includes the step of transmitting a laser beam in a known configurationonto a specular surface of the inspected object, projecting the laser beam reflected by the surface onto a light-scattering screen and forming an image of the surface on the screen, and detecting the image of the surface in the known configuration in relation to a predetermined portion of the screen. An apparatus carrying out the method includes a sensor for detecting positional deviation of the image of the surface from a fixed monitored portion of the screen, a adjuster for adjusting the angle subtended by the axes of a transmitter of the laser slit beam and a flaw-detecting image sensor and an adjuster for adjusting the inclination of a plane defined by the axes of the transmitted and the flaw-detecting image sensor relative the surface, both adjusters operating in accordance with the output of the deviation detecting sensor.

Title
Surface flaw detecting method and apparatus
Application Number
6/727874
Publication Number
4715709
Application Date
April 26, 1985
Publication Date
December 29, 1987
Inventor
Hisashi Kubota
Fujisawa
JP
Fumiki Yokota
Yamato
JP
Yoshitada Sekine
Yoya
JP
Agent
Schwartz Jeffery Schwaab Mack Blumenthal & Evans
Assignee
Nissan Motor Company
JP
IPC
G01N 21/88
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