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:
Feb. 24, 1987
Filed:
May. 31, 1983
Applicant:
Inventor:
Ernst Rothe, Munich, DE;
Assignee:
Optische Werke G. Rodenstock, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
350432 ; 350478 ; 350480 ;
Abstract
A scanning objective with two optical elements, which includes at least one aspherical surface; the aspherical surface is so constructed that in comparison with a spherical surface with the same vertex radius of curvature, the thickness of the lens increases toward the outside. By this construction of the aspherical surface in accordance with the present invention, for example, a scanning objective with two lenses and an aspherical surface can be obtained which is limited in diffraction for small image scales.