Fundus camera
US4422735A · kind A · utility
7Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Jan 29, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A fundus camera includes an objective lens which is movable in a plane perpendicular to the principal optical axis thereof. The camera also includes an optical system comprising four reflecting surfaces which move as the objective lens is moved to compensate for an optical path length, the arrangement being such that a visual axis of an eye being examined can be brought into alignment with the principal optical axis of the objective lens without changing the length of the observation and photographing light path, by means of a movement of only part of the optical system and without moving the entire main body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.