Dome Reflector Inspection Layout for Dead Spot Reduction
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Solution Overview
Problem
The existing inspection device configuration, which uses a dome-shaped reflector plate to illuminate the inspection object, creates a dead spot due to the need for through-holes for additional inspection apparatuses, leading to reduced measurement accuracy.
Innovation Solution
The inspection device employs a dome-shaped reflector plate with aperture parts and annular light sources, arranging inspection apparatuses to pass through these apertures, reducing the dead spot and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a through-hole is opened in the reflector plate to install additional inspection apparatuses, then the functionality and versatility of the inspection device is improved, but the illumination uniformity deteriorates and dead spots are created
Solution Approach 1:
The reflector plate is divided into multiple segments or zones, with through-holes strategically positioned in specific segments rather than requiring a large central hole. This segmentation allows multiple inspection apparatuses to be installed while preserving illumination in other segments, thus reducing dead spots and maintaining illumination uniformity.
Solution Approach 2:
The reflector plate is designed with non-uniform properties: certain regions contain through-holes for inspection apparatuses while other regions maintain continuous reflective surfaces for optimal illumination. This local differentiation allows the system to simultaneously achieve versatile inspection capabilities and maintain illumination uniformity in critical areas.
2Ease of manufacture
If the diameter of the through-hole is increased to accommodate inspection apparatuses, then the ease of installation is improved, but the measurement accuracy deteriorates due to increased dead spots
Solution Approach 1:
Instead of increasing the diameter of through-holes in a single dimension, the solution transitions to a multi-dimensional approach by creating an array of smaller through-holes distributed across the reflector plate. This allows inspection apparatuses to be accommodated while minimizing the total area of dead spots and preserving measurement accuracy.
3Productivity
If multiple inspection apparatuses are installed on the reflector plate, then the productivity of the inspection system is improved, but the device complexity increases
Solution Approach 1:
The reflector plate is designed as a universal platform that can accommodate multiple types of inspection apparatuses (imaging devices, projection units, sensors) through standardized through-holes and mounting interfaces. This multi-functional design allows the system to perform diverse inspection tasks simultaneously, improving productivity while managing complexity through standardization.
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 configuration minimizes the dead spot and enhances measurement accuracy by ensuring uniform illumination and improved resolution.
Implementation Method 1
uses an illuminating unit including a dome-shaped reflector plate arranged so as to cover the imaging object from a vertical direction to irradiate the imaging object with illumination light by reflecting light from a light source with the reflector plate
Data Source
AI summary
An inspection device includes: a first image unit that captures an image of an inspection object from a vertical direction; a plurality of dome-shaped reflector plates being arranged between the first image unit and the inspection object and having aperture parts on a side of the first image unit and a side of the inspection object, respectively; a plurality of annular light sources that illuminate the respective reflector plates; and apparatuses for inspection (second image unit and projection unit) that are provided outside of the reflector plates and are capable of capturing an image of the inspection object 12 or irradiating the inspection object with light. Optical axes of the apparatuses for inspection are arranged so as to pass through through-holes provided in the reflector plates.