Binocular optical image-pickup equipment and binocular image-pickup system
US5640221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | May 15, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/0043
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A housing has a hollow section, and openings are formed at both ends of the hollow section so as to communicate with the outside. An aperture is formed in the internal wall of the housing so as to oppose the opening, and a video camera is fitted into the opening. A half mirror, a mirror, an optical lens, and light sources are disposed within the hollow section. The light sources are alternately illuminated while a patient wears equipment having such a construction. Light reflected from one eye passes through the half mirror and enters a light receiving surface of the video camera. On the other hand, light reflected from the other eye is reflected from the mirror and a half mirror and, then, enters the light receiving surface of the video camera. The optical lens corrects an error arising from a difference in length between two optical paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.