Pupil measuring apparatus
US7083280B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 2003 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | May 24, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/11
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.