3D Augmented Reality Display System Based on Complex Amplitude Grating Modulation
An augmented reality, complex amplitude technology, applied in optics, optical components, instruments, etc., can solve problems such as the complexity of servo systems, and achieve the effect of low system cost, reduced modulation difficulty and complexity, and good three-dimensional viewing comfort.
Active Publication Date: 2019-03-19
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
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.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] In order to make the purposes, 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 with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are disclosed. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within 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 such as figure 1 shown in 301 and 302), sinusoidal grating 4, phase shifter ( figure 1 not shown in) a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
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 (AR) display system combines artificially generated digital auxiliary signals with real 3D scenes observed by human eyes in real time, which greatly enriches the interaction between humans and the real environment. There is huge potential for applications in fields such as manufacturing. [0003] Existing augmented reality technologies generally display two-dimensional image signals or two-dimensional binocular parallax images. Although a three-dimensional perception can be formed by human visual habits and brain processing to a certain extent, due to the contradiction between focusing and focusing (accommodation-convergence), which violates people's observation habits, long-term wearing is more likely to cause visual fatig...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/22G03H1/12
CPCG02B30/27G02B30/50G03H1/12
Inventor 刘娟高乾坤韩剑
Owner BEIJING INSTITUTE OF TECHNOLOGYGY