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:
Apr. 14, 1998
Filed:
Apr. 29, 1996
Applicant:
Inventors:
Norbert Furstenau, Braunschweig, DE;
Werner Jungbluth, Konigslutter, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
25022714 ; 250221 ; 2505594 ;
Abstract
A photoelectric beam device comprises a light source, a monomode optical fibre, a transmitting optical unit, a reflector and a photodetector, where the transmitting optical unit comprises a collimation optical unit, e.g. in the form of a graded index lens or rod lens and a beam expansion optical unit e.g. in the form of a telescopic optical unit. A fibre-optic directional coupler, arranged between the light source and the monomode fibre, conducts to the photodetector the optical signal reflected back from the reflector to the transmitting optical unit and refocused into the fibre.