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. 01, 2006
Filed:
Jan. 06, 2003
Naotoshi Hakamata, Hamamatsu, JP;
Naotoshi Hakamata, Hamamatsu, JP;
Hamamatsu Photonics K.K., Shizuoka, JP;
Abstract
A pupil measuring apparatus includes a mark placed in a space where a background is observable by both eyes; a mark moving device for moving the mark between the eyes and the background; an illumination optical system for illuminating the eyes from the background side; two cameras for respectively imaging the pupils of the eyes; a calculating means for calculating areas or diameters of the respective pupils thus imaged, from video signals of the two cameras; and a display for providing an output of a graph showing change in the areas or diameters of the two pupils calculated against a position of the mark or a time associated with the position on a single screen.