Laser Illumination System Frequency Conversion Efficiency
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Solution Overview
Problem
Conventional solid-state laser illumination systems for display systems have low output efficiency due to the need for additional optical and mechanical components to convert infrared (IR) laser emissions into visible light, which limits image brightness and size in high ambient light conditions.
Innovation Solution
A laser illumination system that includes a frequency multiplier to convert infrared light into visible light, with optical interfaces that direct and reflect light efficiently, reducing the need for additional components and enhancing output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional solid-state lasers with frequency-multiplying optical elements and multiple filters are used to convert IR light into visible light, then visible light is produced for display illumination, but the output efficiency is relatively low due to additional optical and mechanical components
Solution Approach 1:
The patent extracts and removes unnecessary optical components (multiple filters, complex alignment mechanisms) from the conventional laser illumination system. By eliminating these extraneous elements, the system achieves higher light output efficiency while maintaining the core function of converting IR laser light into visible light for display illumination.
Solution Approach 2:
The patent introduces a carefully designed optical interface as an intermediary between the laser source and frequency-multiplying element. This interface optimizes the coupling of IR light into the nonlinear optical crystal and efficiently extracts the generated visible light, thereby improving overall conversion efficiency without requiring additional complex components.
2Adaptability or versatility
If multiple filters and optical components are used to convert and direct light in the laser illumination system, then light wavelength conversion is achieved, but the system complexity increases with additional components requiring precise alignment
Solution Approach 1:
The patent removes unnecessary filters and optical components from the conventional system. By extracting only the essential elements needed for wavelength conversion, the system maintains its adaptability while significantly reducing device complexity and alignment requirements.
Solution Approach 2:
The patent designs optical elements that perform multiple functions simultaneously. For example, the optical interface serves both to couple IR light into the frequency-multiplying crystal and to extract the generated visible light, eliminating the need for separate components and simplifying the overall system architecture.
3Adaptability or versatility
If conventional laser illumination systems with multiple components are used, then infrared light can be converted to visible light, but the system requires relatively precise alignment of components which increases difficulty of operation
Solution Approach 1:
By removing unnecessary optical components from the system, the patent inherently reduces the number of elements that require alignment. This extraction of extraneous parts directly lowers the alignment precision requirements and simplifies system operation while preserving the core light conversion function.
Solution Approach 2:
The patent merges multiple functions into fewer optical components. The optical interface combines light coupling and light extraction functions, reducing the total number of alignment-critical components and thereby easing operational requirements while maintaining full wavelength conversion capability.
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 system achieves improved light output efficiency by effectively converting infrared laser emissions into visible light, enhancing image brightness and size in display systems, particularly in high ambient light conditions.
Implementation Method 1
an optical element that converts the light corresponding to the first wavelength received at a first surface thereof into light corresponding to a second wavelength
Data Source
AI summary
An apparatus is provided that includes a laser that produces light at a first wavelength, an optical element that converts the light at the first wavelength received at an input end thereof into light at a second wavelength, and an optical interface proximate the input end of the optical element that directs light at the second wavelength through the optical element toward an output end of the optical element.