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:
Jan. 11, 1977
Filed:
Feb. 27, 1976
Applicant:
Inventor:
Albert Macovski, Palo Alto, CA (US);
Assignee:
Maxim Diagnostic Imaging, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G02B / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
2504 / ; 350158 ; 350159 ;
Abstract
A transparency is illuminated from the viewing side with a light converter backing placed against the opposite side. The light reflected from the viewing surface of the transparency is rendered invisible to the viewer. A partially reflecting mirror is placed against the viewing side in regions of particularly low contrast to provide additional enhancement. Back illumination is used to provide adequate brightness in relatively dark areas.
Macovski, Albert. (1977). Transparency contrast enhancement system (U.S. Patent No. 4002914). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4002914
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile