High performance colour corrective anti-reflection coating for visible wavelength optical elements
US11675108B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2020 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | May 27, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/288
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An optical element (200), has a first surface configured to convey light, a second surface configured to convey light, an optical path between the first surface and the second surface, a filter coating (230) applied to the first surface, and a colour corrected anti-reflection (AR) coating (240) with colour correcting and antireflection characteristics applied to the second surface. The AR coating is configured according to an antireflective function to maximise photopic transmission and/or, integrated visual photopic transmission (IVPT) of the optical path. The second surface is disposed opposite the first surface, and the antireflective function is determined according to a daylight emission a I(λ), a transmission spectrum of the antireflection/colour corrective coating T(λ) and a thickness a d(λ), of the film for a specified wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.