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:
Mar. 21, 2000
Filed:
Apr. 29, 1998
Gerhard Haas, Oberschleissheim, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a method and apparatus wherein components and/or markings applied to substrates are illuminated with illumination devices and imaged via a camera, adequate contrast between useful and unwanted structures is achieved even in the case of highly disparate optical properties of different materials for the substrates, components and markings by the use of an illumination device composed of a number of illumination units that respectively emit light in spectral ranges different from one another and which are thereby separately varied in intensity. This illumination with variable spectral distribution assures an adequate contrast even given the employment of different materials for the illuminated items.