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:
Jun. 30, 1992
Filed:
Sep. 14, 1990
Applicant:
Inventor:
Gerd Ulbers, Weilersbach, DE;
Assignee:
Hommelwerke GmbH, Baden-Wurttemberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359534 ;
Abstract
Optical retro-reflector in particular for purposes of interferometry. It has the form of a sphere and is fashioned from an optically refractive material, the index of refraction of which is at least approximately 2, but by preference precisely 2. The reflecting surface of the sphere is coated with a film of reflecting material, preferably vapor-deposited metal. The retro-reflector can be manufactured cheaply and with a high level of surface quality. It has a high degree of reflecting power.