Three-dimensional display device based on constructive interferences

Abstract

The invention relates to a three-dimensional display device based on constructive interferences. The device comprises a coherent source device, a lamp optical system, a complex amplitude spatial light modulator, and a lens array, wherein the coherent source device is used for producing laser beams; the lamp optical system is used for receiving the laser beams and expanding the laser beams; the complex amplitude spatial light modulator is used for receiving the expanded laser beams and performing pixel-by-pixel modulation on amplitudes and phases; and the lens array is used for receiving light waves modulated by the complex amplitude spatial light modulator; a clear aperture of each lens in the lens array is designed, so that each lens can cover more than two pixels of the complex amplitude spatial light modulator; the light waves modulated by the each pixel of the complex amplitude spatial light modulator are focused by the corresponding lenses in the lens array to enlighten a subspace of a three-dimensional imaging space; the light waves modulated by different pixels are focused by different lenses in the lens array to form subspaces which are overlapped mutually; and volume elements are formed based on a constructive interference principle and constitute a discrete three-dimensional image.

Description

technical field [0001] The invention relates to the field of three-dimensional imaging, and more specifically relates to a three-dimensional display device based on constructive interference, which is applicable to the fields of three-dimensional display, virtual reality, computer man-machine exchange, robot vision and the like. Background technique [0002] Optical systems for 3D stereoscopic display can be classified into incoherent 3D stereoscopic display systems and coherent 3D stereoscopic display systems according to whether the light source used is an incoherent light source or a coherent light source. The two basic characteristics of light waves are amplitude and phase. The amplitude reflects the brightness information of the object, while the phase reflects the spatial position and shape information of the object. The biggest difference between the incoherent 3D stereoscopic display system and the coherent 3D stereoscopic display system is that the former only Using...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that one microlens corresponds to one pixel of the spatial light modulator, and the light cone emitted by the point light source focused by each microlens covers the entire stereoscopic imaging space, even when only one voxel is generated, while the light cone emitted to The light outside the voxel is actually stray light, which reduces the utilization rate of light energy and also limits the total number of voxels

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