Method and apparatus for determining depth of focus of an eye optical system
US8931900B2 · kind B2 · utility
0Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2012 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | Oct 18, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/103
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for measuring depth of field of an eye optical system that includes a lens Badal having positive optical power, a positioning apparatus adapted to maintain the eye optical system on the image side of the lens at a first focal plane of the lens and a multi-vergency target that provides a plurality of objects that are simultaneously viewable, through the lens, by the eye optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.