3D Shape Measurement Using Multi-Angle Slit Beam Segmentation
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Solution Overview
Problem
Conventional 3D shape measurement using laser trigonometry is inefficient, requiring lengthy measurement times and degrading precision when trying to measure multiple objects simultaneously, as it often necessitates increasing the distance between the lens and measurement objects, which widens and lengthens the slit beams, reducing linearity and accuracy.
Innovation Solution
The apparatus employs a light source unit that irradiates slit beams at different angles onto a lens unit, allowing these beams to be imaged as a single slit beam on multiple measurement objects, enabling simultaneous parallel measurement without increasing the distance between the lens and objects, thus improving efficiency and precision by adjusting irradiation angles and using an aberration correcting lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the distance between the lens and measurement objects is increased to measure multiple objects simultaneously, then the measurement capacity is improved, but the slit beams become wider and less linear, degrading measurement precision
Solution Approach 1:
The single slit beam is segmented into multiple slit beams by the light source unit that irradiates the lens at different angles. Each angle produces a separate slit beam that can be independently focused on individual measurement objects, allowing multiple objects to be measured simultaneously without increasing the lens-to-object distance.
Solution Approach 2:
The system changes the irradiation angles of the light source as a parameter to control the number and position of slit beams. By adjusting the angles at which light strikes the lens, the system can dynamically control how many slit beams are produced and where they focus, enabling flexible measurement of multiple objects while maintaining beam linearity.
2Productivity
If multiple measurement objects are measured simultaneously, then the measurement efficiency is improved, but the measurement time increases due to the need to measure each object separately in conventional methods
Solution Approach 1:
The system merges multiple measurement operations into a single scanning process. By producing multiple slit beams from a single light source through angular variation, the system can illuminate and measure multiple measurement objects simultaneously in one pass, rather than sequentially measuring each object separately.
Solution Approach 2:
The single light source unit serves multiple functions by irradiating the lens at different angles to produce multiple slit beams that can measure different objects. This multi-functional approach allows one component to perform what would traditionally require multiple separate measurement systems.
3Device complexity
If a single slit beam is used to cover multiple measurement objects, then the device complexity is reduced, but the measurement precision is compromised due to beam width and linearity issues
Solution Approach 1:
The system uses dynamic angular control of a single light source to create multiple slit beams. By varying the irradiation angle dynamically, one light source can produce multiple focused slit beams on different objects, maintaining precision without requiring multiple fixed light sources.
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
This approach significantly reduces measurement time while maintaining precision, allowing for efficient and accurate 3D shape measurement of multiple objects in a single scanning operation, enhancing operational efficiency and reliability.
Implementation Method 1
a lens unit transmitting slit beams to a plurality of measurement objects
Implementation Method 2
an imaging unit obtaining images of the plurality of measurement objects formed by the slit beams irradiated on the plurality of measurement objects
Data Source
AI summary
An apparatus for measurement of a three-dimensional (3D) shape includes a lens unit transmitting slit beams to a plurality of measurement objects, a light source unit irradiating the plurality of slit beams to the lens unit at different angles, an imaging unit obtaining images of the plurality of measurement objects formed by the slit beams irradiated on the plurality of measurement objects, and a calculation processing unit generating information regarding a 3D shape of the plurality of measurement objects from the images obtained by the imaging unit.