Diffraction grating for wavelength selection in line-scan SLO
US10314487B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2015 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Jun 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4227
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In line-scan scanning laser ophthalmoscopy (SLO) a narrowband of wavelengths is required. For greater flexibility the frequencies of this narrowband should be selectable. This is possible using a broadband tunable single mode source, but such a solution is expensive. A system is provided in which an extended broadband source is used. Light from the extended source passes to a diffraction grating, which introduces a wavelength dependent angular separation when reflecting the light. By rotating the diffraction grating, only light of a selectable narrowband passes through a fixed output slit for use by the line-scan SLO system. Alternatively, the diffraction grating can be fixed and a rotatable mirror lying between the diffraction grating and the output slit can be used to select the wavelengths reaching the line-scan SLO system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.