The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1992
Filed:
Jul. 10, 1990
Ming C Leu, Pinebrook, NJ (US);
Zhiming Ji, Kearny, NJ (US);
New Jersey Institute of Technology, Newark, NJ (US);
Abstract
An optical displacement measuring apparatus utilizing triangulation, includes a laser for projecting a laser light beam with a first optical axis onto a surface of an object whose displacement is to be measured; an array of photodetectors for receiving light reflected from the object and for generating a positional signal as an image displacement .delta.; a condensing lens for receiving the light reflected from the object and for supplying the reflected light to the detector array along a second optical axis intersecting the first optical axis at angle .theta., the detector array being inclined at an angle .phi. with respect to the second optical axis; a determining device for non-linearly determining surface displacement as a function of the image displacement .delta. and the angles .phi. and .theta., with the relationship between the image displacement .delta., the surface displacement and the angles .phi.and .theta. always being identical, regardless of the angle .phi..