Stereoscopic retinal camera including vertically symmetrical apertures
US5302988A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1993 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Mar 17, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A stereoscopic retinal camera capable of photographing the stereoscopic picture of the fundus by dividing a light beam reflected by the fundus into two light beams and transmitting the two light beam respectively along the light paths of separate image forming optical systems, the stereoscopic retinal camera comprising photographing diaphragms having two apertures for dividing the light beam reflected by the fundus, disposed in a conjugate relation with respect to the pupil of the examinee's eye through an objective lens so that a photographing image of the fundus of the eye may appear stereoscopic properly based on a stereobase determined on the pupil, the respective apertures of photographing diaphragms having a longer vertical length than a width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.