Grating Transfer Unit for 3D Shape Measurement
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Solution Overview
Problem
Conventional three-dimensional shape measurement apparatuses require multiple grating transfer units and optical systems, increasing manufacturing costs and complexity in control and management, due to the need for independent transfer directions for each grating unit.
Innovation Solution
A three-dimensional shape measurement apparatus with a grating transfer unit that inclines grating units with respect to their arrangement and extension directions, allowing a single unit to transfer multiple grating units simultaneously, reducing the need for multiple transfer units and optical systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple independent grating transfer units are employed to transfer grating units in different directions, then the three-dimensional shape measurement can be performed with precise transfer control, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The patent combines multiple grating transfer units into a single integrated grating transfer unit that can simultaneously transfer multiple grating units in different directions. This is achieved by providing a single grating transfer unit with multiple grating transfer stages or arms, each capable of transferring a grating unit along a different illumination direction, thereby reducing device complexity while maintaining transfer precision
Solution Approach 2:
The single grating transfer unit is designed to perform multiple functions by transferring grating units along multiple different directions simultaneously. This multi-functional design allows one device to replace what would traditionally require multiple separate transfer units, reducing both manufacturing cost and device complexity while maintaining the capability to perform three-dimensional shape measurement
2Measurement precision
If multiple independent grating transfer units are employed to transfer grating units in different directions, then the transfer control can be performed precisely, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple grating transfer units into a single integrated unit, reducing the number of components that need to be manufactured and assembled. This consolidation decreases manufacturing cost while maintaining the precision transfer capability through a unified control system and integrated mechanical structure
3Measurement precision
If optical systems such as reflection mirrors are used to obtain transfer directions, then the grating pattern transfer can be achieved, but the device complexity increases and manufacturing cost increases
Solution Approach 1:
The patent extracts and removes the optical system (reflection mirrors) from the transfer mechanism. Instead of using optical components to obtain transfer directions, the invention directly transfers grating units mechanically along the required directions using a single grating transfer unit with multiple transfer stages, thereby simplifying the device structure and reducing complexity
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 reduces manufacturing costs, simplifies control, and enhances inspection precision by enabling precise transfer of grating units without the complexity of independent systems, while maintaining high transfer effectiveness.
Implementation Method 1
a first grating unit changing the light generated by the first light source unit into a first grating pattern light having a first grating pattern
Implementation Method 2
The grating transfer unit transfers the first grating unit in a first inclination direction with respect to an extension direction of the first grating pattern and an arrangement direction of the first grating pattern
Data Source
AI summary
A three dimensional shape measurement apparatus includes an illumination section and a grating transfer unit. The illumination section includes a light source unit generating a light and a grating unit changing the light generated by the light source unit into a grating pattern light having a grating pattern. The illumination section illuminates the grating pattern light onto a measurement target in a predetermined direction. The grating transfer unit transfers the grating unit in a predetermined inclination direction with respect to an extension direction of the grating pattern and an arrangement direction of the grating pattern. Thus, manufacturing cost may be reduced, and the three dimensional shape measurement apparatus may be easily managed.