Fiber Light Source High-Reflection Film
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Solution Overview
Problem
Conventional fiber light sources suffer from significant fluorescence attenuation due to surface scattering and absorption in optical fibers lacking a high-reflection film, which limits their efficiency in guiding emitted light, particularly in applications like medical endoscopes where heat dissipation and minimal temperature rise are crucial.
Innovation Solution
Incorporating a high-reflection film on the outer surface of the optical fiber containing phosphors, which enhances the reflection and guidance of fluorescence, while also facilitating heat dissipation through the use of metal films and dielectric multilayer structures to minimize light scattering and absorption, thereby improving the light guiding efficiency and reducing temperature increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a high-reflection film is applied to the outer surface of the optical fiber, then light guiding efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies a high-reflection film composed of multiple layers (metal layer, dielectric layers) on the outer surface of the optical fiber. This composite structure combines materials with different optical properties to achieve high reflectivity across broad wavelength ranges, thereby improving light guiding efficiency while managing the complexity through systematic material composition.
Solution Approach 2:
The patent optimizes the thickness, material composition, and layer structure of the high-reflection film to achieve desired optical performance. By adjusting parameters such as film thickness and material properties, the system achieves high light guiding efficiency while controlling manufacturing complexity.
2Illumination intensity
If the optical output is increased to improve illumination intensity, then brightness is improved, but temperature rise increases
Solution Approach 1:
The patent converts the harmful effect of heat generation into a beneficial outcome by using the heat as a driver for phosphor fluorescence conversion. The high optical output that would normally cause excessive temperature rise is instead utilized to excite phosphors, which convert the optical energy to visible light with different wavelengths, thereby achieving bright illumination while managing thermal effects through the phosphor conversion mechanism.
Solution Approach 2:
The patent employs phosphors that undergo optical phase transitions or energy level transitions to convert high-energy exciting light into lower-energy visible light. This conversion process occurs through electronic transitions in the phosphor material, effectively transforming the energy that would otherwise manifest as heat into useful visible illumination.
3Illumination intensity
If phosphors are added to the optical fiber to enable fluorescence conversion, then color rendering is improved, but light scattering increases
Solution Approach 1:
The patent incorporates phosphors with specific local properties into the optical fiber structure. Different phosphor materials with tailored emission characteristics are positioned or distributed within the fiber to achieve desired color rendering. The high-reflection film is also locally optimized to reflect specific wavelength ranges, thereby minimizing light scattering while maintaining excellent color rendering properties.
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 solution significantly enhances the efficiency of light guiding and heat dissipation in fiber light sources, enabling the use of wide color band illumination and maintaining low surface temperatures even at high optical outputs, making them suitable for medical endoscopes.
Implementation Method 1
phosphors that emit fluorescence in accordance with the application of exciting light
Implementation Method 2
a high-reflection film covering the outer surface of a portion through which fluorescence emitted from the phosphor travels
Data Source
AI summary
A fiber light source includes an exciting light source to emit exciting light and an optical fiber to guide the exciting light. The optical fiber contains, in a portion in the longitudinal direction, phosphors that emit fluorescence in accordance with the application of exciting light. The optical fiber includes a high reflection film covering the outer surface of a portion through which fluorescence emitted from the phosphor travels.