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. 03, 1987
Filed:
Jan. 23, 1985
Norbert Neuroth, Mainz, DE;
Schott Glaswerke, Mainz, DE;
Abstract
A method of increasing the contrast when photographing a transparent object, such as a glass object through the use of a television camera, is provided. The transparent object is illuminated with radiation in a region of the spectrum to which the transparent object is impermeable. A filter which suppresses the radiation in the region of the spectrum to which the transparent object is permeable and transmits radiation in the region of the spectrum to which the transparent object is impermeable is used between the light source and the transparent object. An electronic pick-up camera which is sensitive, i.e., capable of detecting radiation, in the region of the spectrum to which the filter is permeable, is used for taking photographs of the object. In contrast to known processes in which the transparent objects appear dark only at certain edge regions or other points of marked curvature, an object which appears transparent to the eye is thus represented in completely opaque fashion, in accordance with this method, so that the geometric dimensions of the transparent object can be determined automatically and can be compared with a prototype during, for example, an operation of manufacture of the transparent objects. The invention also relates to the apparatus for conducting this method.