Endoscope Illumination Substrate Layout to Prevent Light Crosstalk
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Solution Overview
Problem
Crosstalk occurs between white and narrow band light emitting parts in endoscopes, affecting the color tone of endoscopic images during special light observation.
Innovation Solution
An endoscope design featuring a light-shielding body between light-emitting parts to prevent crosstalk, utilizing a combination of first and second light-emitting elements with a light-shielding body to ensure proper illumination and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If alternating white light emitting parts and narrow band light emitting parts are disposed circumferentially for illumination, then both normal light observation and special light observation can be performed, but crosstalk occurs between the light emitting parts affecting image quality
Solution Approach 1:
The illumination substrate is divided into multiple independent light emitting parts (white light emitting parts and narrow band light emitting parts) arranged circumferentially. Each part can be controlled independently to emit specific wavelengths of light, enabling both normal and special light observation functions while minimizing interference between adjacent parts through spatial segmentation.
Solution Approach 2:
A light shielding body is introduced as an intermediary element positioned between adjacent light emitting parts. This light shielding body blocks light from one part from reaching and exciting the fluorescent substance of another part, thereby preventing crosstalk and ensuring that each light emitting part functions independently without interfering with the overall image quality.
2Illumination intensity
If white light emitting parts use combination of blue light emitting element and fluorescent substance, then white light illumination is achieved, but crosstalk occurs when narrow band light is applied to the fluorescent substance
Solution Approach 1:
The light shielding body serves as a mediator that physically separates the narrow band light emitting part from the white light emitting part containing the fluorescent substance. By blocking the path of narrow band light before it reaches the fluorescent substance, the light shielding body prevents the fluorescent substance from being excited by narrow band light, thereby eliminating crosstalk while preserving the white light illumination function.
Solution Approach 2:
The harmful effect of crosstalk is extracted and isolated by introducing the light shielding body that specifically blocks the narrow band light path to the fluorescent substance. This allows the blue light emitting element and fluorescent substance combination to function independently for white light illumination without being contaminated by narrow band light excitation.
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
Prevents crosstalk between light-emitting parts, improving image quality during special light observation and enabling wide-angle illumination without color irregularities.
Implementation Method 1
a light-shielding body that is disposed between one of the first light-emitting parts and the second light-emitting part
Implementation Method 2
a combination of a blue light emitting element and a fluorescent substance that is excited by blue light to emit yellow light
Data Source
AI summary
An endoscope or the like that prevents crosstalk between multiple light-emitting parts is provided. An endoscope includes: an observation window that is disposed at a distal end of an insertion part; a plurality of first light-emitting parts that are disposed around the observation window; a second light-emitting part that is disposed between the first light-emitting parts and emits light at a bandwidth different from a bandwidth of light emitted by the first light-emitting parts; and a light-shielding body that is disposed between one of the first light-emitting parts and the second light-emitting part.