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:
May. 07, 1985
Filed:
Jan. 21, 1983
Applicant:
Inventors:
Gerhard Muller, Aalen, DE;
Jurgen Schwarz, Oberkochen, DE;
Assignee:
Carl-Zeiss-Stiftung, Heidenheim/Brenz, Oberkochen, DE;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350524 ; 350523 ; 350527 ;
Abstract
A retroreflection device is mounted beneath a transmitted-light specimen observed through a reflected-light microscope. The retroreflection device is in the form of an autocollimation system consisting of two high-aperture objectives and a flat mirror. The objectives image the specimen and the mirror one onto the other so that the specimen is further illuminated by its own coincident intermediate image. When making photometric measurements, the double passage of light through the specimen achieves an improvement in contrast as well as an increase in extinction values.