Achromatic waveguide display system based on holographic diffractive optical element
A diffractive optical element and display system technology, which is applied in the field of waveguide display systems, can solve problems such as inconvenient to wear and use, reduce the diffraction efficiency of waveguide display systems, increase the volume and weight of holographic waveguide systems, etc.
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[0015] The embodiments of the present invention will be described in further detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0016] This embodiment provides an achromatic waveguide display system based on a holographic diffractive optical element, including an input coupler, a waveguide, and an output coupler, wherein the input coupler is a transmissive planar holographic grating, and the output coupler is a volume Holographic grating, such as figure 1 Shown.
[0017] In this embodiment, the transmissive plane holographic grating is obtained through the interference of two plane waves. According to the basic theory of grating, during the recording process, the period of the obtained holographic grating can be expressed by formula (1):
[0018] d λ rec 2 sin θ rec 2 ( 1 )
[0019] d is the period of the ...
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