Patent · US Active

Projection device

US9316892B2 · kind B2 · utility

1Cited by

1References

17Claims

0Family size

Assignee

Carl Zeiss AG · DE

Inventors

Marco Pretorius · Oberkochen, DE
Guenter Rudolph · Jena, DE
Enrico Geissler · Jena, DE
Christoph Nieten · Jena, DE

Key dates

Filing date	Jun 30, 2015
Grant date	Apr 19, 2016
Priority date	—
Expiry date	Jun 30, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG02B26/0833
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A projection device includes a first and a second tilting mirror matrix, each including a plurality of tilting mirrors. A cover glass covers the tilting mirrors. An imaging lens system includes a relay lens system which images the tilting mirrors of the first tilting mirror matrix onto the tilting mirrors of the second tilting mirror matrix. Thus light reflected by the tilting mirrors of the first tilting mirror matrix onto tilting mirrors of the second tilting mirror matrix, and a projection lens system, which projects light reflected by tilting mirrors of the second tilting mirror matrix, in order to produce an image, is provided. The imaging lens system further includes a correction element which corrects at least one image error caused by the light obliquely passing through the cover glasses.

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