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Structured light projector and three-dimensional scanner having such a projector

A technology of structured light and projectors, applied in the direction of instruments, optics, optical components, etc., to achieve the effect of reducing blur and simple manufacturing

Active Publication Date: 2019-11-19
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of this application is to at least partly address the aforementioned problems regarding structured light projected in the spectral domain.

Method used

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  • Structured light projector and three-dimensional scanner having such a projector
  • Structured light projector and three-dimensional scanner having such a projector
  • Structured light projector and three-dimensional scanner having such a projector

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Experimental program
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Embodiment Construction

[0094] The same elements shown in the preceding figures are labeled with the same reference numerals.

[0095]According to one embodiment, the general principle of the structured light projector of the present invention is schematically shown in figure 1 middle. The projector mainly includes (except the light source and optical projection components not shown in the schematic diagram):

[0096] - a spectral splitting optical system 3 configured to effect a geometrical separation of the rays of the incident beam according to the wavelength of the incident beam (for example depending on Angular deviation of the wavelength by means of prisms or gratings, or lateral deviation of the beam by means of flat and parallel surface glass plates), and optionally at least one predetermined on the plane, and for example on an encoding device 5 also called a "multiple encoder" 5.

[0097] - encoding means 5 configured for encoding spectrally diffused over some regions, for example by mean...

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PUM

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Abstract

The present application relates to structured light projectors and three-dimensional scanners having such projectors. A structured light projector, successively comprising a light source, a spectral decomposition optical system (3), an encoding device (5), a spectral recombination optical system (8) and a projection optical system; the encoding system (5) comprises a mask ( 51), the mask (51) has a binary coded matrix pattern formed by 2*n rows and m columns, and a sub-pattern consists of rows "1" to "n" illuminated by a beam image with a wavelength of λmin Definition, and a subpattern is defined by rows "n+1" to "2*n" illuminated by a beam image of wavelength λmax, two subpatterns are identical or complementary, and two adjacent columns are respectively have different binary encodings from each other.

Description

technical field [0001] The present invention relates to a structured light projector, in particular to a structured light projector for three-dimensional scanning, and a three-dimensional scanner having said projector. Background technique [0002] A three-dimensional scanner is an instrument that can measure the geometric coordinates (x, y, z) of various points on the surface of a scene or an object. Since the depth (or distance) is usually expressed according to the position (x, y) on the Cartesian coordinate system (coordonnées cartésienne) )z, the measurements are often considered to be a map called "depth" of the imaged scene. The acquired depth map can also be used to compose 3D composite images (digitized objects) for various purposes. [0003] Various scanning technologies are available: some require physical contact with the surface to be digitized, such as a three-dimensional measuring mechanism (MMT, machine à mesurer tridimensionnelle), for which the measurement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/10G02B27/22G03B17/54G01B11/25
CPCH04N13/204G03B21/20G01B11/2513G02B27/10G03B17/54H04N13/254H04N13/271G02B5/04G02B5/1842H04N9/3105H04N9/3167G03B21/2013
Inventor R·米歇尔D·帕尔图什-塞邦
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES