Panoramic ring projection objective based cylindrical structured light projection device

A technology of structured light projection and projection objective lens, which is applied in the field of projection optical systems, can solve problems such as crosstalk, difficulty in synchronous use and integration, and high integration in extremely difficult panoramic space, achieving good imaging quality, superior thermal stability, and no The effect of splicing crosstalk

Active Publication Date: 2019-05-03
杭州环峻科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing structured light projection technology can only project in a small field of view, and there will be strong crosstalk between independent structured light projection systems. Highly integrated structured light projection

Method used

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  • Panoramic ring projection objective based cylindrical structured light projection device
  • Panoramic ring projection objective based cylindrical structured light projection device
  • Panoramic ring projection objective based cylindrical structured light projection device

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The present invention provides a cylindrical structured light projection device based on a panoramic annular projection objective lens, such as figure 1 As shown, it includes coaxially arranged projection light source, structured light emitting device, panoramic annular projection objective lens and image processor; the image processor maps the planar structured light pattern into an annular structured light pattern, and outputs it to the structured light emitting device display; the panoramic annular projection objective conforms to the law of cylindrical imaging, and projects cylindrical structured light; the projection mapping relationship is as follows figure 2 As shown, the flow chart of the structured light projection pattern preprocessing algorithm of the image processor is shown in image 3 shown.

[0027] In the pre...

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Abstract

The invention discloses a panoramic ring projection objective based cylindrical structured light projection device. The projection device includes a projection light source, a structured light emitting device, a panoramic ring projection objective and an image processor which are in coaxial and successive arrangement; the image processor maps a planar structured light pattern into a ring structured light pattern to output to the structured light emitting device to perform display; the panoramic ring projection objective accords with a cylindrical imaging law, projects cylindrical structured light, and consists of an aberration balance lens set and a panoramic ring block unit lens set which are in coaxial arrangement; and the panoramic ring block unit lens set converts paraxial rays into large visual field off-axis rays. The projection device can realize cylindrical panoramic structured light projection, so that the projection range of structured light can be significantly enlarged, thesurface image features of surrounding objects can be effectively enhanced, and convenient image matching and three-dimensional reconstruction coding and decoding can be realized; through the adoptionof single display module and single projection lens modes, crosstalk problems of multi-source structured light projection can be avoided; and the device is simple in structure, light in weight and controllable in cost.

Description

technical field [0001] The invention relates to a projection optical system in projection display technology, in particular to a cylindrical structured light projection device based on a panoramic annular projection objective lens. Background technique [0002] The three-dimensional information perception of objects is the basis of accurate spatial positioning and surface contour detection, and also constitutes the basic technology of machine vision. On the macro scale, common 3D sensing optical technologies are divided into passive and active. [0003] Passive 3D sensing technologies include multi-view stereo vision, estimating 3D information from motion information, estimating 3D information from texture information, estimating 3D information from shadow information, etc. Among them, multi-view stereo vision technology is the most commonly used. The multi-view stereo vision technology imitates the human eyes, and calculates the depth through the image parallax obtained by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G03B15/02
Inventor 白剑黄潇王佳郑臻荣刘向东
Owner 杭州环峻科技有限公司
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