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:
Aug. 05, 2008
Filed:
Apr. 10, 2006
Naotoshi Hakamata, Hamamatsu, JP;
Naotoshi Hakamata, Hamamatsu, JP;
Hamamatsu Photonics K.K., Shizuoka, JP;
Abstract
A pupil measuring apparatus comprises a markplaced in a space where a background is observable from the two eyes E; a mark moving devicefor moving the markbetween the two eyes E and the background; an illumination optical systemfor illuminating the two eyes E from the background side; two cameras A, B for respectively imaging the two pupils PP; calculating meanstofor calculating areas or diameters of the respective pupils thus imaged, from video signals of the two cameras A, B; and a displayfor providing an output of a graph of change in the areas or diameters calculated against a position of the markor a time associated with the position on a single screen.