Reflection volume holographic grating waveguiding structure

A volume holographic grating and waveguide structure technology, applied in diffraction grating, optics, optical components, etc., can solve the problems of increasing the thickness of the optical system and complex design.

Active Publication Date: 2016-07-27
SOUTHEAST UNIV
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Problems solved by technology

The advantage of this structure is that it maintains the advantages of high transmittance, good monochromaticity, and wide color gamut of the holographic grating waveguide structure, but the complex design of this structure will also increase the thickness of the optical system.

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  • Reflection volume holographic grating waveguiding structure
  • Reflection volume holographic grating waveguiding structure
  • Reflection volume holographic grating waveguiding structure

Examples

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Embodiment Construction

[0060] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0061]A reflective volume holographic grating waveguide structure, such as Figure 5-12 As shown, it includes a planar light source 1, a slab waveguide 4, an incident-end grating and an exit-end grating. The incident-end grating and the exit-end grating are arranged on the slab waveguide 4, and the incident-end grating and the exit-end grating are in a mirror image relationship. The grating at the incident end includes a first reflective volume holographic grating 2 ...

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Abstract

The invention discloses a reflection volume holographic grating waveguiding structure.The reflection volume holographic grating waveguiding structure comprises a plane light source (1), a flat panel wave guide(4), an incidence end grating and an emergence end grating, and the incidence end grating and the emergence end grating are arranged on the flat panel wave guide(4) and are in a mirror-image relation; the incidence end grating comprises a first reflection volume holographic grating (2) and a second first reflection volume holographic grating (3), while the emergence end grating comprises a third reflection volume holographic grating (5) and a fourth reflection volume holographic grating (6), incident light beams are subjected to bragg diffraction through the first reflection volume holographic grating (2) and the second first reflection volume holographic grating (3), emergent light beams are subjected to bragg diffraction through the third reflection volume holographic grating (5) and the fourth reflection volume holographic grating (6), and the light beams are emitted into human eyes (7).By means of the reflection volume holographic grating waveguiding structure, the range of an incidence angle can be enlarged, meanwhile, dispersion can be reduced, the view field can be enlarged, continuity of exit pupils is guaranteed, and thereby display quality is improved.

Description

technical field [0001] The invention relates to a volume grating waveguide structure in eye-wearing holographic display technology, in particular to a reflective volume holographic grating satisfying Bragg diffraction conditions. Background technique [0002] With the development of the micro-display industry, display devices are becoming miniaturized and personalized. In recent years, head-mounted display technology has received a lot of attention from the market. Head-mounted display devices represented by augmented reality (AR) and virtual reality (VR) have been extensively researched and developed and used in military and consumer markets. [0003] Due to the limitations of optical principles, traditional near-eye display devices are difficult to produce a larger exit pupil range while maintaining a large field of view (FOV). The waveguide display device uses the light in the waveguide medium to satisfy the principle of total reflection propagation. With the help of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/18G02B27/01
CPCG02B5/1861G02B27/0172G02B2027/0174G02B2027/0178
Inventor 张宇宁翁一士沈忠文
Owner SOUTHEAST UNIV
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