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:
Nov. 02, 2010
Filed:
Apr. 29, 2005
Juerg Hinderling, Marbach, CH;
Juerg Hinderling, Marbach, CH;
Leica Geosystems AG, Heerbrugg, CH;
Abstract
For the deliberate attenuation of beam components which originate from multiple reflections, an attenuation filter () which produces an attenuation of the intensity by at least a factor of 0.7, preferably at least 0.5 or 0.3, is arranged in each case before a receiver () and after a transmitter (). Alternatively or additionally, deflection means, such as a mirror () or a cubic prism (), can be formed so as to attenuate a beam. Since multiply reflected beam components pass through the attenuation means at least twice as frequently as the regular beam components the former are accordingly more greatly attenuated. Furthermore, an entry surface () of the receiver () may be surrounded by a conical deflection surface which substantially absorbs light incident on it and reflects the remainder in directions other than the direction of incidence, so that this cannot give rise to multiple reflections.