3D augmented reality display system based on complex-amplitude grating modulation
An augmented reality and complex amplitude technology, applied in optics, optical components, instruments, etc., can solve problems such as the complexity of the servo system, achieve low system cost, eliminate focus-focus contradictions, and reduce modulation difficulty and complexity.
Active Publication Date: 2016-08-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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However, the two spatial light modulators in this system need to be aligned at the pixel level, and the corresponding servo system is also relatively complicated.
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[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0015] see figure 1 , this embodiment discloses a three-dimensional augmented reality display system based on complex amplitude grating modulation, including:
[0016] Amplitude-only spatial light modulator (A-SLM) 1, 4f lens system (the two lenses that make up the 4f lens system are as follows figure 1 Shown in 301 and 302), sinusoidal grating 4, phase shifter ( fig...
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The invention discloses a 3D augmented reality display system based on complex-amplitude grating modulation. With the system, a real 3D image and an outside real scene can be superposed. The system comprises an amplitude-only spatial light modulator, a 4f lens system, a sine grating, a phase shifter, and a half-transparent and half-reflecting mirror. The amplitude-only spatial light modulator and the sine grating are sequentially placed on an input focal plane and on a spectrum plane of the 4f lens system. The phase shifter is placed near the amplitude-only spatial light modulator. The half-transparent and half-reflecting mirror is placed behind and a certain distance away from an output focal plane of the 4f lens system. The two partitions of the amplitude-only spatial light modulator are respectively loaded with two holograms. Under the irradiation of laser, the two holograms are modulated by the sine grating in the frequency domain of the 4f lens system, and are synthesized into a target complex-amplitude wave front in the output plane. The target complex-amplitude wave front is propagated to the half-transparent and half-reflecting mirror and is coupled and superposed into the vision of the human eye through the half-transparent and half-reflecting mirror.
Description
technical field [0001] The invention relates to the technical field of augmented reality, in particular to a three-dimensional augmented reality display system based on complex amplitude grating modulation. Background technique [0002] Augmented reality (Augmented reality, AR) display system combines artificially generated digital auxiliary signals with the real 3D scene observed by human eyes in real time, which greatly enriches the interaction between human beings and the real environment. It is widely used in medicine, military and industrial manufacturing. There is huge application potential in other fields. [0003] Existing augmented reality technologies generally display two-dimensional image signals or two-dimensional binocular parallax images. Although a three-dimensional three-dimensional look and feel can be formed by human visual habits and brain processing to a certain extent, due to the contradiction between accommodation and focus, which violates people's ob...
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Login to View More IPC IPC(8): G02B27/22G03H1/12
CPCG02B30/27G02B30/50G03H1/12
Inventor 刘娟高乾坤韩剑
Owner BEIJING INSTITUTE OF TECHNOLOGYGY