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:
Dec. 31, 1991
Filed:
Jun. 29, 1990
Applicant:
Inventors:
Dieter Muller, Konigsbronn, DE;
Jurgen Schwarz, Oberkochen, DE;
Assignee:
Carl-Zeiss-Stiftung, Heidenheim/Brenz, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
351221 ; 351205 ;
Abstract
Apparatus for determining the focal plane of invisible laser-therapy radiation in ophthalmological instruments. A visible laser marking beam is split by simple means into four individual beams which share the instrument's optical path with the invisible laser radiation and are combined at the instrument's focal plane to form a single light spot.