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:
Jul. 11, 2017
Filed:
May. 16, 2012
Hans-jürgen Dobschal, Kleinromstedt, DE;
Hans-Jürgen Dobschal, Kleinromstedt, DE;
CARL ZEISS AG, Oberkochen, DE;
Abstract
The invention relates to a lens which has an extended range of focus, wherein the lens consists of a solid material, the optical surfaces of the lens are transparent and the lens has a focal power distribution. According to the invention, the focal power distribution Fof the lens (), in relation to a plane perpendicular to the optical axis (), changes as a function of the radial height r and of the azimuth angle phi of the aperture between a base value of the focal power Fnot equal to zero and a maximum value F. Hence, the focal power distribution emerges as(,phi)=(,phi),with the spiral focal power component(,phi)=()*(phi),where F(r) depends nonlinearly on the radius and w(phi) is a factor for the focal power component with a spiral profile.