Patent · US Active

Projection apparatus

US9581888B2 · kind B2 · utility

2Cited by

9References

19Claims

0Family size

Assignee

Young Optics Inc. · TW

Inventors

Eberhard Piehler · Jena, DE
Gudran Schroeter · Jena, DE
Guenther Benedix · Jena, DE
Gertrud Blei · Jena, DE
Thomas Maack · Rastenberg, DE

Key dates

Filing date	Feb 19, 2015
Grant date	Feb 28, 2017
Priority date	—
Expiry date	Jun 12, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/16
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A projection apparatus includes an image-producing element and projection optics. The image-producing element produces at least one image, and the projection optics has free-form areas for magnifying and reflecting the image toward an viewer for observation. The projection optics includes at least a first mirror and a second mirror, the image is reflected by the first mirror and the second mirror in succession, no deflection mirror is disposed between the viewer and the second mirror, and the first mirror and the second mirror are in the form of a non-rotationally symmetrical system.

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