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

US8467132B2 · 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: Feb 25, 2010
• Grant date: Jun 18, 2013
• Expiry date: Feb 25, 2030

Classification

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

Abstract

A display device including a holding device that can be placed on the head of a user, an image generating module fixed to the holding device and generating an image, and a multifunction glass that is fixed to the holding device and 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 extracted 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 in area has a Fresnel structure causing a folding of the beam path when the image is injected into the multifunction glass, said structure having an imaging property.