WiMi Hologram Cloud Inc., a leading global Hologram Augmented Reality (“AR”) Technology provider, announced that to improve the image quality of color hologram and reduce the crosstalk between different colors of broadband, the concept of metasurface dynamic holography was proposed, and a patent for a spatial filtering device based on optical holography was obtained.
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The spatial filtering technique in this patent is to process and adjust the data of each pixel point of an image (individual pictures or frames in a video, etc.) by means of a filtering function to achieve a predetermined purpose: spatial filtering of existing pairs of images. The technology consists mainly of a division, a setup, and a processing module, through which the image is filtered. Using metasurface dynamic holography, a transmission/reflection light field distribution with fine nanoscale resolution can be achieved to encode complex holographic amplitudes, thus producing arbitrary holographic intensity distributions in the plane. It allows the image center to be consistent when reconstructing images at different depths while eliminating the interlayer crosstalk problem and improving the quality of multidimensional holographic imaging by exploiting the feature of non-overlap between different layers in the hologram. The present research results aim to solve the two core problems of the large volume of optical structures and visual convergence conflicts in the same near-eye display system. The patent provides a novel, simple, and easy-to-operate optical information fidelity method that can reproduce target images with complex patterns and high resolution and fidelity requirements by constructing hybrid images based on the characteristics of human eye observation targets and frequency information of the images.
Based on the current research, the metasurface dynamic holography technology will develop toward multiplexing larger capacity information, larger area processing, and lower latency real-time reconfigurability in the visible region. There is still much room for the development of this technology. In the future, WiMi will also use metasurface dynamic holography technology to further research in the direction of high-performance, real-time dynamic, multi-channel coding, and chip/fiber integration applications
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