3D Shape Measuring Apparatus Shadow Removal
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Solution Overview
Problem
Conventional 3D shape measuring apparatuses have complex optical systems that fail to effectively remove shadows and efficiently measure reflected light, leading to suboptimal performance.
Innovation Solution
A 3D shape measuring apparatus with a simplified optical system configuration, incorporating a projection part, image formation part, prism part, and mirror parts to selectively transmit and reflect light, utilizing a prism assembly or rotating mirror mechanism to direct light and reduce shadow interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional 3D shape measuring apparatus uses symmetric first and second inspection parts to remove shadows, then shadow removal capability is improved, but the optical system configuration becomes very complex
Solution Approach 1:
The patent extracts the shadow removal function from the complex symmetric dual-inspection-part configuration and implements it through a simplified optical path using a beam splitter and mirror. The beam splitter separates the projection light path from the imaging light path, allowing shadow removal without requiring symmetric complex optics on both sides.
Solution Approach 2:
The patent merges the projection and imaging functions into a single inspection part configuration, using a beam splitter to combine the light paths. This allows the system to achieve shadow removal capability while maintaining a simpler optical structure compared to the symmetric dual-inspection-part design.
2Object-affected harmful factors
If a conventional 3D shape measuring apparatus uses symmetric first and second inspection parts, then shadow removal is achieved, but manufacturing cost increases due to complex optical components
Solution Approach 1:
The patent extracts the shadow removal function from the expensive symmetric dual-inspection-part configuration and implements it through a simplified optical path using a beam splitter and mirror. This extraction reduces the number of complex optical components required, thereby lowering manufacturing costs while maintaining shadow removal capability.
Solution Approach 2:
The patent replaces expensive, complex optical components with simpler, more cost-effective elements such as beam splitters and mirrors. These simpler components achieve the same shadow removal function at a lower manufacturing cost, aligning with the principle of using cheaper alternatives when performance requirements are met.
3Object-affected harmful factors
If a conventional 3D shape measuring apparatus uses a complex optical system with symmetric inspection parts, then shadow removal is possible, but the apparatus cannot efficiently measure only reflected light
Solution Approach 1:
The patent extracts the reflected light measurement function from the complex symmetric configuration and implements it through a simplified optical path. The beam splitter and mirror arrangement allows the imaging sensor to efficiently capture only the reflected light from the object surface, improving measurement efficiency while maintaining shadow removal capability.
Solution Approach 2:
The patent introduces a beam splitter as an intermediary component that efficiently directs reflected light from the object to the imaging sensor. This intermediary element enables precise measurement of reflected light by controlling the optical path, achieving better measurement efficiency compared to the conventional symmetric configuration.
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 apparatus effectively removes shadows and measures reflected light, resulting in a simpler optical system configuration and reduced manufacturing costs while maintaining accurate 3D shape measurement capabilities.
Implementation Method 1
the prism part selectively transmits the light generated from the projection part to the first mirror part and the second mirror part
Implementation Method 2
a first mirror part and a second mirror part being provided in both ends of the prism part respectively, wherein the prism part selectively transmits the light generated from the projection part to the first mirror part and the second mirror part to be directed towards a surface of a test object
Implementation Method 3
selectively transmits a reflected light to the viewing part
Data Source
AI summary
An apparatus for measuring a 3-dimensional (3D) shape which can remove a shadow, which may occur when measuring the 3D shape, and also can measure a reflected light from an external surface of a test object, is provided. The apparatus for measuring a 3D shape includes a projection part 10 generating a light, an image formation part 20 sensing the light, a prism part 30 being provided between the projection part 10 and the viewing part 20, and a first mirror part 40 and a second mirror part 50 being provided in both ends of the prism part 30. Also, the prism part 30 selectively transmits the light generated from the projection part 10 to the first mirror part 40 and the second mirror part 50 to be directed towards an external surface of a test object 1. When the light reflected from the external surface of the test object 1 is selectively transmitted to the first mirror part 40 and the second mirror part 50 and thereby reflected, the prism part 30 transmits the reflected light to the viewing part 20.