Three-dimensional scanner and control method

The three-dimensional scanner adjusts lens motion amplitude based on surface shape data to stabilize the depth of field, ensuring accurate and efficient data capture by optimizing the lens's reciprocating motion.

JP7783851B2Active Publication Date: 2025-12-10J MORITA MANUFACTURING CORP
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Patent Information

Application Number
JP2023085378
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-05-24
Publication Date
2025-12-10
Estimated Expiration
2043-05-24

AI Technical Summary

Technical Problem

Existing three-dimensional scanners face issues with unstable depth of field due to lens reciprocating motion amplitude, leading to narrow capture ranges, increased capture time, computational load, and heat generation, or wide capture ranges with unnecessary areas, affecting data accuracy and speed.

Method used

A three-dimensional scanner that adjusts the depth of field by controlling the lens's reciprocating motion amplitude based on the proportion of teeth and gums in the field of view, using a control method that includes an acquisition unit to determine the surface shape and a lens control unit to vary the lens's motion amplitude.

Benefits of technology

The scanner achieves an appropriate depth of field for accurate and efficient data capture by optimizing the lens motion, reducing unnecessary imaging and computational load, and minimizing heat generation.

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Abstract

To provide a technique of setting the depth of field when acquiring three-dimensional data of the surface shape of a target object to an appropriate value.SOLUTION: A three-dimensional scanner 100 includes: a lens 81; an imaging unit for taking an image of a target object 99 in the focal position of the lens 81; a lens driving unit 80 for driving the lens 81 so that the lens 81 can make a reciprocating-motion in a straight direction; an acquisition unit 401 for acquiring shape data showing the surface shape on the basis of the image taken by the imaging unit; and a lens control unit 402 for controlling the lens driving unit 80 and changing the amplitude of the reciprocating-motion of the lens 81 on the basis of the shape data acquired by the acquisition unit 401.SELECTED DRAWING: Figure 9
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Citation Information

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