High speed variable focal field lens assembly and related methods
US10444491B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 2015 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Sep 5, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A variable focal length optical assembly may include a deformable entry lens element, a deformable first reflective element and a deformable second reflective element. Using a controller coupled to the deformable elements, an external force such as a mechanical, electrical, electromechanical, or electromagnetic force is applied to the deformable elements to provide any number of different focal lengths. Since the deformation of the deformable elements, and consequently the changes in focal length, occur much faster than the playback frame rate, a number of sub-frames, each containing an image obtained at a different focal length, are associated with each playback frame. The availability of multiple images in the form of sub-frames permits the selection of an optimal image for inclusion in the final playback frame sequence. The availability of multiple images in the form of sub-frames at different focal lengths also permits the seamless incorporation of zoom-in and zoom-out effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.