Endoscope Illumination Adjuster for Uniform Luminance Distribution
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Solution Overview
Problem
Existing endoscope systems face challenges in achieving uniform luminance distribution across the observation object, leading to biased luminance in images due to varying light quantities from different illuminators, which can result in overexposure or underexposure and reduce the depth range for observation.
Innovation Solution
An endoscope system with a light source that emits primary light, plural illuminators to emit secondary light, and an adjuster to control the ratio of light quantities to each illuminator, ensuring a desired distribution of illumination light across the observation object by adjusting the light quantity and emission timing of the primary light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple illuminators are used to illuminate different regions of the observation object, then the coverage area is improved, but the luminance distribution becomes non-uniform with biased regions
Solution Approach 1:
The patent applies local quality by assigning different light quantities to different illuminators based on their specific illumination regions. The light source controller independently controls each illuminator's emission light quantity to match the required illumination level for its target region, achieving uniform overall luminance distribution while maintaining appropriate coverage area.
Solution Approach 2:
The patent changes the parameter of emission light quantity for each illuminator dynamically. The light source controller adjusts these parameters based on feedback from the imaging unit and predetermined criteria, optimizing the luminance distribution across the entire observation object while maintaining comprehensive coverage.
2Area of stationary object
If the emission light quantity of illuminators is increased to improve illumination coverage, then the coverage area is improved, but overexposure occurs in certain regions
Solution Approach 1:
The patent prevents overexposure by applying local quality control to each illuminator. The light source controller independently adjusts the emission light quantity of each illuminator according to its specific illumination region's requirements, ensuring adequate coverage without excessive light intensity in any single region.
Solution Approach 2:
The patent employs feedback control where the light source controller receives information from the imaging unit about the actual illumination效果和 luminance distribution, then adjusts the emission light quantity of each illuminator accordingly to prevent overexposure while maintaining comprehensive coverage.
3Illumination intensity
If the emission light quantity of illuminators is increased to ensure sufficient illumination, then the illumination intensity is improved, but underexposure in other regions occurs due to non-uniform distribution
Solution Approach 1:
The patent resolves underexposure issues by applying local quality control to each illuminator. The light source controller independently adjusts the emission light quantity of each illuminator based on the specific requirements of its illumination region, ensuring that each area receives appropriate light intensity without compromising other regions.
Solution Approach 2:
The patent changes the emission light quantity parameters of individual illuminators dynamically. The light source controller adjusts these parameters based on feedback from the imaging unit and predetermined criteria, optimizing the luminance distribution to ensure sufficient illumination intensity across all regions while maintaining 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 system achieves a uniform luminance distribution within the target range, preventing overexposure or underexposure and maintaining an optimal depth range for observation by dynamically adjusting the light quantities and emission times of the illuminators.
Implementation Method 1
a light source 110 configured to emit primary light; plural illuminators 71a and 71b that are irradiated with the primary light to emit plural respective illumination light A and B generated based on the radiated primary light
Data Source
AI summary
An endoscope system includes: a light source that is configured to emit primary light; plural illuminators that are configured to be irradiated with the primary light to emit plural respective illumination light generated based on the radiated primary light toward an observation object so that at least part of the plural illumination light overlap on the observation object; and an adjuster that is configured to desirably adjust a ratio of light quantities of the primary light that travels from the light source to the respective illuminators, so as to distribute the primary light to the respective illuminators.