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

摘要

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.

主权项

1. A method for producing a multifunction optical element for a display device, the display device comprising an image-generating module which generates an image, the method comprising:
forming the multifunction optical element with a coupling-in area and a coupling-out area, the coupling-in area being located separately from the coupling-out area, wherein a structure of the multifunction optical element is such that the image generated by the image-generating module that is coupled into the multifunction optical element via the coupling-in area, is guided in the multifunction optical element along a folded optical path by multiple total internal reflections from the coupling-in area to the coupling-out area and coupled out via the coupling-out area such that a user can perceive a coupled-out image superimposed on surroundings; wherein the coupling-out area is formed with a Fresnel structure having an imaging property and which receives light via the folded optical path from the coupling-in area and couples the image out of the multifunction optical element by forming the Fresnel structure to have several Fresnel segments and forming optically effective facets of the Fresnel segments such that the optically effective facets optically correspond to an imaginary optically effective surface which is curved.