Ophthalmic lens arrangement and an apparatus for demonstrating a plurality of optical functions and a method for demonstrating a plurality of optical functions
US8672478B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2010 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Dec 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to an ophthalmic lens arrangement (10) comprising a polarizer (11) for polarizing light in a polarization axis; at least one lens cell (13) including a switchable light rotator; a lens member (15) having birefringence properties such that incident light encounters a first refractive index n on an ordinary axis or a second refractive index on an extraordinary axis according to the rotation of the incident light; and a sub lens member (17) having a refractive index n; characterized in that: the or each rotator is operable to rotate incident light by 0° or by 90°, and the polarizer is arranged such that the polarization axis coincides with either the ordinary axis or the extraordinary axis of the or each lens member. The invention further relates to an apparatus for and a method for demonstrating a plurality of optical functions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.