Augmented reality diffraction optical waveguide and augmented reality display device
An augmented reality, optical waveguide technology, applied in the direction of light guide, plane/plate light guide, light guide of lighting system, etc., can solve the problems of small field of view of diffractive optical waveguide, unable to meet the needs of user immersion, etc., to achieve grating The effect of compact area and reduced area
Pending Publication Date: 2021-10-22
ZHEJIANG CRYSTAL OPTECH
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[0003] The field of view of the existing diffractive waveguide is relatively small, usually only about 50 degrees, which cannot meet the needs of users for immersion. Therefore, it is very necessary to design a diffractive waveguide with a large field of view to improve the field of view of the diffractive waveguide.
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[0025] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0026] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, wi...
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The invention provides an augmented reality diffraction optical waveguide and an augmented reality display device, and relates to the technical field of augmented reality. A coupling-in grating area and a functional grating area which are used for coupling light beams into a waveguide substrate are arranged on the waveguide substrate, the functional grating area comprises a first grating area used for forming a first view field and a second grating area used for forming a second view field, and the first grating area and the second grating area are provided with an overlapping area and a non-overlapping area. The field angle which can be supported by the augmented reality diffraction optical waveguide can be effectively expanded in a mode of splicing the first field of view and the second field of view, and meanwhile, the first grating area and the second grating area are formed by splicing the two fields of view respectively, so that the overlapped area can serve as a relay and a coupling-out grating of the first field of view and the second field of view at the same time, each grating area of the augmented reality diffraction optical waveguide can be more compact, and the refractive index of the substrate is effectively reduced when a large field angle is supported.
Description
technical field [0001] The present application relates to the field of augmented reality technology, in particular, to an augmented reality diffractive optical waveguide and an augmented reality display device. Background technique [0002] Augmented reality display technology is a new interactive display technology that superimposes virtual information on the real world for human observation. The transmission of virtual information is completed by the projection light machine. The current mainstream projection solutions include laser beam scanning (LBS, Laser Beam Scanning), free-form surface projection, Bird Bath, geometric array waveguide, and diffractive optical waveguide. Since the augmented reality display is a head-mounted display, it is sensitive to the quality and size of the projection light machine. Therefore, the waveguide solution with a thin and light display form, especially the diffractive waveguide solution, is favored by major technology giants and is cons...
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Login to View More IPC IPC(8): G02B6/00G02B27/01
CPCG02B6/0026G02B6/005G02B27/0172G02B27/0103G02B2027/0123G02B2027/0174
Inventor 刘明欢冯东洋刘风雷
Owner ZHEJIANG CRYSTAL OPTECH