Display device comprising multifunction glass, production method and optical element having a fresnel structure

US8970961B2 · kind B2 · utility

Assignee

• Carl Zeiss AG · DE

Inventors

• Hans-Juergen Dobschal · Kleinromstedt, DE
• Guenter Rudolph · Jena, DE
• Karsten Lindig · Erfurt, DE

Key dates

• Filing date: Apr 14, 2014
• Grant date: Mar 3, 2015
• Expiry date: Apr 14, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/017
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A multifunction optical element including an image generating module that generates an image, and couples the image into a multifunction glass that has a coupling in area and a coupling out area. The image produced is coupled into the multifunction glass via the coupling in area, guided in the multifunction glass to the coupling in area, and coupled out via the coupling out area, in such a way that the user can perceive the coupled out image superimposed on the surroundings when the holding device is placed on the head of the user. The coupling out area has a Fresnel structure which receives light from the coupling-in-area via a folded beam path and couples the image out of the multifunction optical element. The coupling out element has an imaging property.