Scanning Endoscope Light Absorbing Section for Beam Directivity Control
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Solution Overview
Problem
Scanning endoscopic devices face challenges in reducing the directivity of beam light, which can lead to high-intensity light exiting in specific directions, potentially damaging the device and affecting image quality.
Innovation Solution
Incorporating a black filling member between the proximal side fiber portion and the outer envelope tube, or using a light guide with an uneven surface to scatter or absorb beam light, reducing directivity without increasing the outer envelope tube's wall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the outer envelope tube wall thickness is increased to reduce beam light directivity, then light control is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
A light absorbing member is introduced as an intermediary component between the optical fiber and the outer envelope tube. This member selectively absorbs beam light with high directivity before it can exit through the outer envelope tube, thereby reducing harmful light directivity without requiring the outer envelope tube itself to be thicker or more complex.
Solution Approach 2:
The light controlling function is extracted from the outer envelope tube structure and transferred to a separate light absorbing member. This allows the outer envelope tube to maintain its original simple structure while the light absorbing member handles the beam light directivity problem independently.
2Reliability
If the outer envelope tube wall thickness is increased to prevent high-intensity light exit, then device safety is improved, but manufacturing precision requirements increase
Solution Approach 1:
The light absorbing member serves as a mediator that intercepts high-intensity beam light before it reaches the outer envelope tube. This eliminates the need for the outer envelope tube to have increased wall thickness or higher manufacturing precision, as the light absorbing member handles the safety function independently with simpler manufacturing requirements.
3Object-affected harmful factors
If a light guide with uneven surface is used to scatter beam light, then light directivity is reduced, but device complexity increases
Solution Approach 1:
The light absorbing member is positioned as an intermediary between the optical fiber and the external environment. It absorbs beam light with high directivity through its material properties, achieving light control without requiring complex surface structures like uneven light guide surfaces.
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
Effectively decreases the directivity of beam light, preventing high-intensity light from exiting and maintaining device integrity while scanning, without requiring thicker outer envelope tubes.
Implementation Method 1
a light absorbing section which includes a black filling member filling a space between the proximal side fiber portion and the outer envelope tube in radial directions, and which is configured to absorb beam light having directivity in one direction
Data Source
AI summary
A scanning endoscopic device includes an optical fiber allowing irradiation light guided from a proximal side fiber portion to a distal side fiber portion to exit from a distal end thereof, and an actuator section placed to a distal direction side of the proximal fiber portion. The scanning endoscopic device includes a light absorbing section absorbing beam light having directivity in one direction, and the light absorbing section includes a black filling member filling a space between the proximal side fiber portion and an outer envelope tube in radial directions. The device further includes a light scattering section provided between the proximal side fiber portion and the outer envelope tube in the radial directions to scatter the beam of light.