Light diffusion type speckle projector, focusing method thereof and three-dimensional reconstruction system

Abstract

The invention provides a light diffusion type speckle projector, focusing method thereof and three-dimensional reconstruction system. The speckle projector includes at least one semiconductor laser and at least one diffraction optical component arranged in a light path of the semiconductor laser for forming a light beam having a speckle pattern after laser emitted by the semiconductor laser penetrates through the diffraction optical component. The speckle projector does not need a collimator arranged between the semiconductor laser and the diffraction optical component. Therefore, quality of the light beam having the speckle pattern projected by the speckle projector can be improved and the minimization of the speckle projector is facilitated, especially, the height dimension of the speckle projector can be reduced.

Description

technical field

[0001] The invention relates to a speckle projector, in particular to a diverging light speckle projector, its focusing method and a three-dimensional reconstruction system. Background technique

[0002] With the maturation of camera technology and the continuous rapid development of the camera industry, the functions of the camera module are no longer limited to ordinary photos. have been widely used. For example, the projector can project compiled light to the object or scene, and then the camera module can obtain the depth information associated with the object or scene by obtaining the light reflected by the object or scene, so as to realize 3D mapping, modeling or 3D reconstruction of objects or scenes. Usually (not all cases), the projector can be implemented as a speckle projector, which can project light with a speckle pattern to an object or scene, so that it can be received by the camera module later by the object or Light with a speckle pattern ...

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