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. 05, 1980
Filed:
Oct. 28, 1977
Applicant:
Inventor:
Guy Roziere, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H01J / ;
U.S. Cl.
CPC ...
350314 ; 2502 / ;
Abstract
The present invention relates to a film for correcting gain irregularities occurring between the different points of optical images. The film applied to the image is split into elementary areas of constant transparency. Within each of these areas, the transparency is adjusted by opaque parts separated by transparent parts. The product of the gain of the image by the transparency of the film is maintained constant over the whole of the area of the image. In the example, these elementary areas are squares and the opaque parts are strips of fixed width. Application is to the image intensifier tubes of scintillography circuits.