Light Source Apparatus Backward Radiation Recovery
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Solution Overview
Problem
Fiber light source apparatuses face issues with low light utilization efficiency due to backward radiation and heat absorption, leading to reduced illumination intensity and increased temperature at the tip end, which affects the coherence and diffuser performance.
Innovation Solution
A light source apparatus design incorporating a primary light source, a diffusing member, a reflection portion, and an emission portion, where the diffused light is converted by regular or diffuse reflection and emitted externally without reentering the diffusing member, enhancing light utilization efficiency and reducing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If laser light is diffused by the diffuser, then desired illuminance distribution is obtained, but light utilization efficiency is degraded due to backward radiation and heat absorption
Solution Approach 1:
The diffuser is divided into multiple sections (first diffuser section, second diffuser section, third diffuser section) with different optical functions. The first section diffuses light forward, the second section reflects backward-radiated light forward, and the third section allows selective transmission. This segmentation enables the system to recover energy that would otherwise be lost while maintaining proper illuminance distribution.
Solution Approach 2:
The invention converts the harmful backward-radiated light (which causes heat absorption and energy loss) into a beneficial resource by using the reflection portion to redirect it forward through the window portion. This transforms waste energy into useful illumination, improving overall light utilization efficiency while maintaining the desired illuminance distribution.
2Object-affected harmful factors
If laser light is diffused, then coherence is reduced and speckle is minimized, but heat is generated at the tip end portion
Solution Approach 1:
The invention extracts and removes the harmful backward-radiated light from the system before it can be absorbed and converted into heat at the tip end portion. By using the reflection portion and window portion to redirect this light forward for useful illumination, the system eliminates the source of heat generation while maintaining the speckle-reducing diffusing effect.
3Device complexity
If a simple diffuser is used, then device complexity is low, but light is lost and illumination becomes darker
Solution Approach 1:
The invention merges multiple functions into an integrated diffuser assembly: the first diffuser section provides diffusion, the reflection portion captures backward radiation, the second diffuser section further diffuses the reflected light, and the window portion enables selective transmission. This combination of multiple components working together recovers lost light and maintains high illumination brightness without excessive complexity.
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 design achieves high light utilization efficiency, reduces heat at the tip end, and minimizes speckle formation by broadening the angle of radiation, resulting in brighter illumination with improved coherence.
Implementation Method 1
a diffusing member that diffuses and converts the primary light into diffused light
Implementation Method 2
a reflection portion that converts the diffused light into reflected light by regular reflection or diffuse reflection
Data Source
AI summary
A light source apparatus includes a primary light source that emits primary light, a diffusing member that diffuses and converts the primary light into diffused light, a reflection portion that regularly reflects or diffuse-reflects and converts the diffused light into reflected light, and an emission portion that emits the reflected light to an outside. A portion of the primary light is converted in an order of the diffused light and the reflected light and emitted to the outside from the emission portion in a state of the reflected light.