Segmented Optical Wavelength Converter for Stable Laser Illumination
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Solution Overview
Problem
Conventional optical wavelength converters face issues with reduced wavelength conversion efficiency and unstable light output due to high-power laser excitation, leading to unbalanced rotation and mismatched blue laser speckle, which affects the intensity and chroma of the output light.
Innovation Solution
The introduction of a second substrate with alternately arranged segments optimizes the rotation of the optical wavelength converter, ensuring stable transmission and reflection of light, minimizing speckle mismatch, and enhancing the balanced rotation, thereby stabilizing the intensity and chroma of the output light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-power laser light is used to excite the phosphor powder, then the lumen output is increased, but the substrate becomes very hot and the wavelength conversion efficiency is reduced
Solution Approach 1:
The substrate is divided into multiple segments (first segments and second segments) that are alternately arranged. The first segments contain phosphor powder for wavelength conversion while the second segments are transparent to allow direct transmission of blue laser light. This segmentation allows the system to handle high-power laser excitation while maintaining efficient wavelength conversion and controlling heat distribution across the substrate.
2Area of stationary object
If the diameter of the substrate is larger, then the area for light conversion is increased, but the unmatching between the blue laser speckle and the hollow portion is increased and the rotation becomes more unbalanced
Solution Approach 1:
The substrate is segmented into alternating first segments (with phosphor) and second segments (transparent) arranged in a pattern that maintains rotational balance. This segmentation allows the substrate to have sufficient area for effective light conversion while the alternating pattern ensures uniform weight distribution and proper alignment with the blue laser speckle during rotation, preventing rotational imbalance.
3Productivity
If the rotation rate is increased, then the light output frequency is improved, but the oscillation amount of the motor is difficult to control and the output light quality is deteriorated
Solution Approach 1:
The alternately arranged first and second segments create a balanced rotational structure that reduces motor oscillation during high-speed rotation. The symmetric alternating pattern ensures uniform mass distribution, which stabilizes the rotation and maintains consistent alignment between the substrate features and the blue laser speckle, thereby preserving output light quality even at high rotation rates.
Solution Approach 2:
Different segments have different optical properties: first segments are designed for wavelength conversion while second segments are transparent for direct blue light transmission. This local differentiation optimizes the overall system performance by ensuring that each region performs its specific function efficiently, maintaining light output quality during high-speed operation.
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 configuration results in a more stable and high-quality light source by uniformly transmitting laser speckle and precisely controlling the optical wavelength converter, improving the overall light output and reducing deviations or vibrations.
Implementation Method 1
The first wavelength conversion material is contained in the first segment for converting a first waveband light into a second waveband light
Implementation Method 2
The second waveband light is reflected by the first segment
Implementation Method 3
The first waveband light is transmitted through the second segment
Data Source
AI summary
An optical wavelength converter includes a first substrate, a first wavelength conversion material, and a second substrate. The first substrate has at least one first segment. The first wavelength conversion material is contained in the first segment for converting a first waveband light into a second waveband light. The second waveband light is reflected by the first segment. The second substrate is arranged beside the first substrate, and has at least one second segment. The first waveband light is transmitted through the second segment.