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:
Feb. 08, 2000
Filed:
Jul. 21, 1998
Wolfram Laux, GroBhansdorf, DE;
Jurgen Klicker, Hoisdorf, DE;
Basler AG, , DE;
Abstract
Device for optical detection of the deformation of a surface with at least one photosensitive receiver having a matrix image plane, which is exposed by at least one light source. It is proposed according to the invention that the light source is constructed as a nearly point-source light with uncollimated light and in imaging optics are provided and adjusted such that the light source is imaged sharply onto the image plane (14) of the photosensitive receiver, so that the surface to be examined acts as a reflective surface, the light source having a known nominal position on the image plane in case of a flawless surface being examined, so that the deformation can be determined from the deviation of the actual position of the image of the light source from the known nominal position of the image of the light source on the image plane. With this arrangement, a deformation, in particular, an erroneous inclination of a CD or DVD, can be detected with high precision and by simple means.