Low-bulk optical collimator for generating a small spot of illumination
US10502393B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2016 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Jul 27, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2101/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting device comprises a solid optical collimator (6′), the collimator comprises a truncated cap having an inside surface (10′) operating in total internal reflection and having a small base opening into a frustoconical through recess that is coaxial with the cap and at the centre of which a light source (8′) is placed, and having a refractive large base such that incident light emitted by the light source is guided in totality by the inside surface towards the large base of the cap. The recess of the collimator is disposed in the cap in such a manner as to have a small base open and coinciding with the small base of the cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.