Patent · US Active

Device for short-distance projection at a reasonably large angle with zoom and focusing

US9019597B2 · kind B2 · utility

1Cited by

4References

9Claims

0Family size

Assignee

OPTINVENT · FR

Inventors

Pascal Benoit · Rennes, FR
Guilhem Dubroca · Rennes, FR
Khaled Sarayeddine · Chantepie, FR

Key dates

Filing date	Jan 11, 2011
Grant date	Apr 28, 2015
Priority date	—
Expiry date	Jul 24, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG03B21/28
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention proposes a short-distance front projection system, that is to say with a wide angle, occupying a small volume and offering a possibility of focusing as well a zoom function. It makes it possible to obtain images with a diagonal greater than 2 meters, the whole of the optical system being at least 50 cm from the plane of the image. This projector is constructed on the basis of three optical elements: an ocular, an afocal lens system and a final group forming an objective intended to form the intermediate image in front of the mirror.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.