3D Contour Scanning Device Single Polarizer Optical Path
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Solution Overview
Problem
Conventional three-dimensional contour scanning devices face accuracy issues due to refraction light from the interior of the teeth, which affects the accuracy of surface contour measurements.
Innovation Solution
A three-dimensional contour scanning device incorporating a single polarizing element on both the projection and image-formed optical paths, which filters off refracted light, ensuring only surface-reflected light is analyzed for accurate contour mapping, thereby reducing complexity and cost by eliminating the need for multiple polarizing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single polarizing element is used on both projection and image-formed optical paths, then measurement precision is improved by filtering refracted light, but device complexity is reduced compared to using multiple polarizing elements
Solution Approach 1:
The patent merges the function of multiple polarizing elements into a single polarizing element that is positioned to filter light on both the projection optical path and the image-formed optical path. This single element performs the work of what would traditionally require multiple separate polarizing elements, thereby reducing device complexity while maintaining the ability to filter refracted light and improve measurement precision
2Device complexity
If conventional scanning without polarizing elements is used, then device complexity is low, but measurement precision deteriorates due to refraction light interference
Solution Approach 1:
The patent introduces a polarizing element as an intermediary component in the optical path. This intermediary filters out refracted light that would otherwise interfere with surface contour measurements, thereby improving measurement precision while adding only a single relatively simple component to the system
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the accuracy of surface contour measurements by filtering refracted light, improving the device's ability to capture precise three-dimensional contours of the scanned object while simplifying the optical path and reducing costs.
Implementation Method 1
The single polarity element is disposed on the projection optical path and the image-formed optical path
Implementation Method 2
some of the projection lights not completely reflected from the teeth are refracted to the inside of the teeth and then are emitted off the teeth
Implementation Method 3
The projection light reflected from the to-be-scanned object becomes an imaging light further reflected to the image sensing element
Data Source
AI summary
A three-dimensional contour scanning device including an image sensing element, a light source and a single polarity element is provided. The light source is used for emitting a projection light to a to-be-scanned object through a projection optical path. The projection light reflected from the to-be-scanned object becomes an imaging light further reflected to the image sensing element through an image-formed optical path. The single polarity element is disposed on the projection optical path and the image-formed optical path.