Handheld oral three-dimensional scanning device and control method

A technology of three-dimensional scanning and control methods, which is applied in medical science, dentistry, etc., can solve problems such as difficult to meet the internal scanning requirements of the oral cavity, and achieve the effects of increasing accuracy, reducing scanning angles, and reducing errors

Active Publication Date: 2017-10-31
PEKING UNIV SCHOOL OF STOMATOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing industrial hand-held scanners have a fixed focal depth, a single focal depth camera, and a single angle between the projection and receiving optical paths are difficult to meet all the scanning needs of the interior of the oral cavity, models and impressions

Method used

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  • Handheld oral three-dimensional scanning device and control method
  • Handheld oral three-dimensional scanning device and control method
  • Handheld oral three-dimensional scanning device and control method

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Embodiment Construction

[0032] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] see Figure 1-3 , a handheld oral three-dimensional scanning device of the present invention, comprising:

[0034] The characteristic pattern projector is used to project the characteristic pattern to the surface of the measured object;

[0035] Two sets of camera lenses with different focal depths have different angles with the projection direction of the characteristic pattern projector, and are used to receive the fringe patterns diffusely reflected from the surface of the scanned oral object with different depth-to-diameter ratios. They can be electronically switched to complete the same Reflected light pickup in different depth areas of the scanned object;

[0036] Computer, through software to realize spatial coordinate calculation and multi-field scanning data splicing;

[0037] The computer is electrically connected w...

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Abstract

The invention relates to a handheld oral three-dimensional scanning device which comprises a characteristic pattern projector, two sets of camera lenses of different focal depths and a computer, wherein the characteristic pattern projector is used for projecting characteristic patterns to the surface of a detected object; the camera lenses form different included angles with the projection direction of the characteristic pattern projector respectively, and are used for receiving stripe patterns subjected to diffuse reflection on the surface of the scanned oral objects of different depth-diameter ratios; due to electronic switching, the operation of picking up the reflected light in different depth areas of the same scanned object is completed; the computer realizes space coordinate calculation and multi-view scanning data combination; and the computer is respectively and electrically connected with the characteristic pattern projector and the camera lenses. According to the device disclosed by the invention, the flexibility of hand exercise of an operator and high efficiency of large-size single-view scanning can be combined, the posterior area and anterior area of impression are respectively scanned by two sets of cameras with different focal depths, and the three-dimensional surface data subjected to oral impression are rapidly acquired.

Description

technical field [0001] The invention relates to a three-dimensional oral cavity scanning device, and also relates to a control method of a hand-held three-dimensional oral cavity scanning device. Background technique [0002] The demand for 3D oral cavity scanning is strong. The scanning motion path of the common 3D scanner for dental and jaw models is preset by the manufacturer. There are large morphological differences between the oral cavity models and oral impressions of different individuals. When using this type of device to scan, the scanning The path cannot be personalized, resulting in the scanning path not being able to traverse all the surfaces of the scanned object, or unnecessary repeated scanning of the same surface area, which not only affects the scanning efficiency, but also a large amount of redundant scanning data will increase the difficulty of data fusion and increase the scanning error . [0003] Human hand-eye coordination can achieve more than the de...

Claims

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Application Information

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IPC IPC(8): A61C19/04
CPCA61C19/04
Inventor 孙玉春崔海华王勇戴宁原福松张馨月
Owner PEKING UNIV SCHOOL OF STOMATOLOGY
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