Light Distribution Matching Unit for Capsule Endoscopy
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Solution Overview
Problem
Conventional capsule-shaped in-vivo imaging devices face challenges in capturing clear images of internal subjects due to uneven color distribution caused by mismatched light distributions from different wavelength sources, leading to suboptimal image quality.
Innovation Solution
The implementation of a light source unit with first and second light sources emitting in different wavelength bands, a light distribution matching unit using dichroic prisms and diffusers to align and distribute these lights, and an imaging unit to capture images while ensuring the optical axes and distributions of the lights are matched, thereby reducing color unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple light sources with different wavelength bands are used for illumination, then the imaging capability and color information are improved, but color unevenness occurs due to mismatched light distributions
Solution Approach 1:
A light distribution matching unit is introduced as an intermediary component between the multiple light sources and the subject. This unit includes optical elements (lenses, diffusers, reflectors) that adjust and match the light distribution of each wavelength band, ensuring uniform illumination across the subject and eliminating color unevenness while preserving the benefits of multi-wavelength imaging
Solution Approach 2:
The optical parameters (focal length, aperture, diffusion angle) of the illumination system are adjusted and optimized for each light source to achieve matched light distributions. By changing these optical parameters, the system ensures that light from different wavelength bands illuminates the subject uniformly, preventing color unevenness while maintaining high image quality
2Object-affected harmful factors
If light distribution matching components are added, then color unevenness is reduced, but device complexity increases
Solution Approach 1:
Multiple optical functions (focusing, diffusing, reflecting, and light distribution matching) are merged into a single integrated light distribution matching unit. This consolidation reduces the number of separate components and simplifies the overall optical system while still achieving the goal of eliminating color unevenness through coordinated light distribution control
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 results in improved image data with reduced color unevenness, allowing for clearer and more accurate representation of internal structures, particularly in medical imaging applications.
Implementation Method 1
a light distribution matching unit that matches distributions of the first light and the second light, wherein the light distribution matching unit includes a mirror that reflects the first and second light
Implementation Method 2
a half mirror that reflects a part of the first and second light and transmits a part of the light
Data Source
AI summary
A body-introducable apparatus includes: a light source unit having a first light source that outputs first light and a second light source that outputs second light in a wavelength band different from that of the first light; a light distribution matching unit that matches distributions of the first light and the second light; an illuminating control unit that illuminates the inside of the subject by driving the light source unit; and an imaging unit that captures an image of the inside of the subject.