Ophthalmic apparatus having light polarizing means
US5719659A · kind A · utility
41Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1996 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Dec 5, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/101
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ophthalmic apparatus for diagnosing the condition of an eye based on an examination of images of interference fringes formed by a lacrimal layer on the anterior portion of the eye. The apparatus has an illumination system that projects a beam of light from a light source onto the anterior portion of the eye, and an imaging system, such as a CCD camera, that produces images of interference fringes formed by a lacrimal layer on the anterior portion of the eye. The illumination and imaging systems each have linear polarizers having mutually parallel linear polarization axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.