Optical System Dome Light Coaxial Light Design
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Solution Overview
Problem
Existing optical systems struggle to reliably extract three-dimensional shape information of high-gloss metal objects in real time due to non-uniformity caused by environmental factors and complex shapes.
Innovation Solution
A method and apparatus for designing an optical system that includes a dome light and a coaxial light, where the distance between the dome light and the coaxial light is determined based on the radius reduction due to a hole in the dome light, the size of the coaxial light is optimized based on the optical path, and the structure of the printed circuit board (PCB) in the dome light is designed to minimize non-uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing optical systems are used for high-gloss objects, then image capturing can be performed, but non-uniformity occurs due to environmental factors and complex shapes
Solution Approach 1:
The optical system is segmented into distinct functional components: a dome light unit with multiple LEDs arranged in specific patterns, a coaxial light unit, and a camera unit. Each component is independently designed and optimized to perform its specific function, allowing the overall system to achieve uniform illumination while maintaining reliability in extracting three-dimensional shape information from high-gloss objects.
Solution Approach 2:
Different regions of the illumination system are designed with different properties to address specific local requirements. The dome light uses multiple LEDs positioned at different locations and angles, while the coaxial light provides centralized illumination along the optical axis. This local differentiation ensures uniform coverage across the entire object surface, particularly for complex shapes with varying surface orientations.
2Adaptability or versatility
If lighting is designed according to object's application field, then analysis of high-gloss objects with complex shapes becomes possible, but existing optical systems struggle with non-uniformity
Solution Approach 1:
The system merges two different illumination approaches: the dome light unit that provides omnidirectional illumination from multiple angles, and the coaxial light unit that provides centralized illumination along the optical axis. By combining these complementary illumination methods, the system achieves both adaptability to complex shapes and uniformity of illumination, overcoming the limitations of existing optical systems.
Solution Approach 2:
The illumination system transitions from conventional single-direction or limited-angle lighting to multi-dimensional illumination. The dome light arrangement creates illumination from all directions around the object, while the coaxial light adds illumination from the optical axis direction. This dimensional expansion of the illumination space enables uniform lighting of complex three-dimensional shapes regardless of their orientation or surface geometry.
3Ease of manufacture
If optical system is not precisely designed, then environmental factors such as camera hole non-uniformity and lighting non-uniformity occur
Solution Approach 1:
The optical system is designed with pre-calculated and pre-positioned illumination sources. The dome light LEDs are arranged in specific geometric patterns with predetermined positions and orientations, and the coaxial light is positioned precisely on the optical axis. This preliminary design of illumination geometry ensures uniform lighting from the start, eliminating the need for complex post-adjustment procedures and maintaining both ease of manufacture and high uniformity.
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 designed optical system effectively eliminates non-uniformity in image capturing, enabling reliable analysis of high-gloss objects with complex shapes, and improving the accuracy of three-dimensional shape information extraction.
Implementation Method 1
an optical system for analyzing information on the surface of an object is designed to analyze the surface of the object by emitting light to the object and analyzing images taken of the light reflected from the object
Data Source
AI summary
A method of designing an optical system including a dome light and coaxial light, includes: determining a distance between the dome light and the coaxial light based on a radius reduction according to a hole of the dome light; determining a size of the coaxial light based on an optical path of a light ray emitted from the coaxial light; and determining a structure of a printed circuit board (PCB) in the dome light based on an optical path through which the light ray emitted from the coaxial light is reflected by an object.