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, 1989
Filed:
Sep. 17, 1987
Applicant:
Inventor:
Kurt Eichweber, Hamburg, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250574 ; 250575 ; 250221 ; 356442 ;
Abstract
The arrangement for the transmission of laser light (9) exhibits a laser tter (1) and a receiver (2) for the laser light (9). In order that it should be possible to establish if the optical system (6) of the receiver (2) becomes dirty or an obstruction passes in front of this optical system, the laser receiver (2) is provided with a reference light source (12) disposed after the optical system (6). If the objective (6) becomes dirty or if an obstruction passes in front of the same, light from the reference light source (12) is scattered into the detector (7), so that an alarm indication can be given by a warning circuit (14).