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:
Mar. 16, 1976
Filed:
Nov. 11, 1974
Applicant:
Inventor:
Andor A Fleischman, Northbrook, IL (US);
Assignee:
Bell & Howell Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350220 ; 3501 / ; 350176 ; 350204 ;
Abstract
This invention relates to a short focal length, large aperture optical system having a relatively long back focus primarily designed to efficiently transmit monochromatic light rays to an image plane with an extraordinarily high degree of correction over a prescribed field.