Holographic waveguide lens and augmented reality display device

A holographic waveguide and lens technology, applied in optical components, optics, instruments, etc., can solve the problems of low light efficiency, low brightness, low single coupling efficiency, etc., and achieve the effect of high light efficiency

CN109239920AInactive Publication Date: 2019-01-18SVG TECH GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high photosynthetic efficiency holographic waveguide lens and an augmented reality display device. The high photosynthetic efficiency holographic waveguide lens comprises atleast one holographic waveguide lens unit, and the waveguide lens unit is composed of a waveguide substrate and two grating areas arranged on the waveguide substrate. No secondary turning needs to beperformed at the middle via a relay grating to transmit an optical signal, so that the difficulty of accurately matching phase conditions is greatly reduced, the gratings in the grating areas can adopt surface relief gratings and can be copied in batches through the nanoimprinting process. A reflecting element is placed on an emission end face of the holographic waveguide lens, so that the light originally lost from the end face continues to act with the emission grating, thereby effectively overcoming the shortcomings of low photosynthetic efficiency of the holographic waveguide. Furthermore,by means of the sizes of the two grating areas, the mutual distance, the structure of the gratings and the thickness size cooperation of a waveguide substrate, a function of once coupling in and multiple coupling output that is absent in the prior art can be achieved, and a pupil expansion function is achieved very conveniently.
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Description

technical field

[0001] The invention relates to the technical field of display equipment, and more specifically, to a holographic waveguide lens and an augmented reality display device. Background technique

[0002] Augmented reality (AR) technology is to use computer graphics technology and visualization technology to generate virtual objects that do not exist in the physical world, and accurately "place" them in the physical world, presenting users with a new environment with richer perception effects. In many fields, such as industrial manufacturing and maintenance, medical field, military field, entertainment game field, education field, etc., it has huge potential application value. In the AR industry chain, lenses with both transparency and imaging / light-guiding effects are the most critical components for the implementation of AR hardware. Domestic and foreign industries or scientific research circles have developed a series of AR devices. For example, Google Glass u...

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0041] A holographic waveguide lens, the holographic waveguide lens includes at least one holographic waveguide lens unit, such as figure 1 and figure 2 As shown, the holographic waveguide lens is an example composed of only one holographic waveguide lens unit. The holographic waveguide lens unit 1 is composed of a waveguide substrate 2, two functional grating regions and a reflection part 6 arranged on the waveguide substrate, wherein The gratings in the two fun...