Double function tilting head ophthalmic instrument
US9220407B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2012 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Nov 6, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/18
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems for performing sequential multiple function ophthalmic measurements using separate measurement instruments, by mechanical switching between the instruments. In prior art systems, the separate measurement instruments are stacked, and transfer between them is performed by means of a linear mechanical motion stage. The separate measurement instruments of the present application are mounted on a base which is rotatably pivoted around a joint at a location remote from the optical entry apertures of the instruments. The entrance apertures of the measurement instruments then traverse the eye being measured sequentially. A rotational motion around the pivoted joint is thus transformed into a linear motion at the eye of the subject, without the need for a linear motion stage. A Scheimpflug camera corneal thickness measurement is also described, in which the measurement head is tilted during the corneal scan such that the illuminating slit beam always impinges on the cornea normally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.