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

US8736962B2 · 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: May 15, 2013
• Grant date: May 27, 2014
• Expiry date: May 15, 2033

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 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.