Zoom optical system
US10409044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2018 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Oct 10, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom optical system and automated luminaire are provided. The zoom optical system includes a light source and compensator, variator, and objective lens groups. The light source illuminates an object in an object plane. The compensator lens group is optically coupled to the object without intervening lenses, has a positive optical power, six lenses, and moves relative to the object plane. The variator lens group is optically coupled to the compensator lens group without intervening lenses, has a negative optical power, three lenses, and moves relative to the object plane and the compensator group. The objective lens group is optically coupled to the variator lens group without intervening lenses, has a second positive optical power, three lenses, remains in a fixed position relative to the object plane, and projects an image of the object without intervening lenses between the objective lens group and the projected image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.