Dichroic filter conformed to optical surface
US9434145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2012 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Jul 21, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for forming an optical element deposits a first thin film coating to form a first coated surface on a first transparent substrate that is substantially flat, wherein, for incident light at an angle of incidence exceeding 5 degrees, the first multilayer thin film coating transmits a first wavelength band and reflects a second wavelength band. The first coated surface has a first surface form, and further has a second surface opposite the first coated surface with a second surface form. The second surface of the first substrate bonds to a third surface of a second transparent substrate to form the optical element. The third surface has a third surface form prior to bonding and the first coated surface has a fourth surface form after bonding. The difference between the fourth and the third surface forms is less than the difference between the first and third surface forms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.