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:
Oct. 02, 2001
Filed:
May. 22, 1998
Pawel Drabarek, Tiefenbronn, DE;
Robert Bosch BmGH, Stuttgart, DE;
Abstract
An interferometric instrument that includes a radiation generating unit for emitting briefly coherent radiation is used for sensing the surfaces of a test object by determining an interference maximum. Precise determination of the interference maximum, and therefore precise sensing of the test object, are achieved by providing, in the optical path of the first beam component and/or in the optical path of the second beam component, an arrangement which produces a frequency shift between the two interfering beam components and by providing a beam splitting arrangement, located in front of the photodetector arrangement in the optical path of the interfered radiation upstream from the photodetector device, which can be used to split the beams into at least two spectral components and supply them to the photodetector arrangement either directly or via additional elements on the photodetectors assigned to the components.