Endoscope Light Source Stabilization via Radial Fluorescent Body Positioning
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Solution Overview
Problem
Conventional endoscope systems experience light quantity fluctuations due to the rotational movement of the fluorescent body, leading to inconsistent illumination, which can be attributed to mechanical factors such as rotational axis accuracy and mounting errors.
Innovation Solution
A light source device with a rotational body and a fluorescent body that adjusts the radiation position of excitation light between two different radii to control the quantity of light emitted, using a control portion to switch between a first and second quantity of light based on the observation distance, thereby stabilizing the illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the fluorescent body is rotated to change illumination wavelength, then the endoscope can perform multiple observation functions, but light quantity fluctuations occur due to mechanical errors in rotation
Solution Approach 1:
The patent changes the radial position parameter of the fluorescent body on the rotational body to adjust the excitation light quantity. By moving the fluorescent body to different radii (first radius for normal observation, second radius for close observation), the system achieves both wavelength versatility and light quantity stability without mechanical fluctuation compensation.
2Illumination intensity
If the excitation light quantity is increased for close observation, then illumination intensity improves, but the fluorescent body deteriorates faster
Solution Approach 1:
The patent changes the radial position parameter of the fluorescent body to control excitation light quantity. At the second radius, the fluorescent body receives reduced excitation light intensity, extending its service life while still providing sufficient illumination for close observation, thus resolving the contradiction between illumination intensity and durability.
3Device complexity
If the fluorescent body is positioned at a fixed radius, then the structure is simple, but light quantity fluctuations occur during rotation
Solution Approach 1:
The patent introduces dynamic positioning of the fluorescent body at different radii based on observation requirements. The control unit dynamically adjusts the fluorescent body's radial position (first radius for normal, second radius for close observation), transforming a static structure into a dynamic system that maintains light quantity stability while keeping the overall structure relatively simple.
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 solution effectively suppresses light quantity fluctuations and reduces the risk of fluorescent body deterioration, providing stable and consistent illumination for both near-point and far-point observations.
Implementation Method 1
a fluorescent body configured to cause light in a predetermined wavelength range to be emitted upon receiving light radiated from an illuminating portion
Data Source
AI summary
A light source device for endoscope includes a rotational body configured to rotate with a rotational axis as a center; a fluorescent body arranged in a predetermined area of the rotational body and configured to generate fluorescence by excitation light being radiated; an illuminating portion capable of selectively radiating excitation light of a first quantity and excitation light of a second quantity which is larger than the first quantity to a fluorescent body; and a control portion configured to switch between a first state of radiating the excitation light of the first quantity to the fluorescent body arranged in a first area and a second state of radiating the excitation light of the second quantity to the fluorescent body arranged in a second area.