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:
Oct. 30, 1990
Filed:
Aug. 08, 1989
Applicant:
Assignee:
National Science Council, Taipei, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
351242 ; 350237 ; 350174 ; 362293 ;
Abstract
A four-channel anomaloscope for detecting the color sense match of the blue cone function and the color weakness or blindness in red and green comprising a housing, optical elements, circuit control means, appropriate computer facilities and software programs wherein the optical elements comprise lighting bulbs, single wavelength interference type filters, 50/50 spectroscopes, a reflective mirror, and photodiodes. The present invention further relates to a method of making the brightnesses of both partitions of the bipartite field produced in the four-channel anomaloscope to coincide with each other.