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:
Oct. 31, 2017
Filed:
Sep. 26, 2014
Deutsches Krebsforschungszentrum, Heidelberg, DE;
Johann Engelhardt, Bad Schoenborn, DE;
DEUTSCHES KREBSFORSCHUNGSZENTRUM, Heidelberg, DE;
Abstract
An apparatus forming an area of minimum light intensity enclosed by high light intensity includes two objectives focusing light of opposite directions into a common focal area. Light intensities of a first pair of light beams extinguish each other in a first partial area of the focal area. Beam paths of the first pair of beams pass through the objectives in a first pair of partial areas of the pupils of the objectives. Light intensities of a second pair of light beams extinguish each other in a second partial area of the focal area. Beam paths of the second pair of light beams pass through the objectives in a second pair of partial areas which are offset with regard to the first pair of partial areas of the pupils; and the light of the second pair does not interfere with the light of the first pair of light beams.