Automotive Light Device Using Nonlinear Optical Medium
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Solution Overview
Problem
Existing vehicle lighting devices face challenges in providing aesthetically appealing designs while meeting technical specifications, as they often require numerous components and are not easily adaptable to vehicle styling, and laser-based systems struggle to produce directional white light due to phosphor conversion which reduces luminescence and directivity.
Innovation Solution
A vehicle light device utilizing a primary light source and a nonlinear optical medium to convert monochromatic light into a broad spectrum white light, maintaining collimation and directivity, comprising a wavelength conversion element with nonlinear optical effects, such as frequency mixing or Raman effects, and an output lens to transmit highly directional white light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If phosphor conversion is used to generate white light from laser, then white light is produced, but directivity and luminescence are reduced
Solution Approach 1:
The patent extracts the wavelength conversion function from a traditional phosphor layer and implements it through a nonlinear optical medium that maintains beam collimation. By using optical parametric oscillation and supercontinuum generation in a photonic crystal fiber, the system converts laser wavelengths to a broad spectrum while preserving the directional properties of the original laser beam, thus extracting only the necessary wavelength conversion capability without the harmful scattering effects of phosphor materials.
Solution Approach 2:
The patent replaces the mechanical/phosphor-based wavelength conversion system with an optical nonlinear medium system. Instead of using phosphor particles that scatter light, the invention employs optical parametric oscillation and nonlinear optical effects in a photonic crystal fiber to generate supercontinuum light. This substitution eliminates the mechanical scattering process and maintains the coherent, directional nature of the light throughout the wavelength conversion process.
2Reliability
If multiple components (reflectors, cut off devices) are used to meet technical specifications, then photometric requirements are met, but device complexity increases
Solution Approach 1:
The patent merges multiple optical functions into a single integrated system. The nonlinear optical medium simultaneously performs wavelength conversion, beam collimation, and spectral broadening that would traditionally require separate components. The photonic crystal fiber structure integrates waveguiding, nonlinear optical interaction, and spectral shaping functions, eliminating the need for separate reflectors, cutoff devices, and other optical components while maintaining photometric performance.
Solution Approach 2:
The photonic crystal fiber and nonlinear optical medium serve multiple functions simultaneously: they act as the light source, wavelength converter, beam collimator, and spectral shaper. This multi-functional component replaces what would traditionally require multiple specialized components, reducing overall device complexity while maintaining the ability to meet photometric requirements through the engineered supercontinuum output.
3Adaptability or versatility
If traditional lighting components are used for aesthetic effects, then styling options increase, but adaptability to vehicle design decreases
Solution Approach 1:
The patent enables dynamic control of light properties through the nonlinear optical system. By adjusting pump laser parameters, fiber length, and nonlinear interaction conditions, the system can dynamically change output spectrum, intensity, and spatial distribution. This dynamic controllability allows the same basic device structure to adapt to different aesthetic requirements and vehicle styling options without requiring physical reconfiguration or additional components.
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 provides a highly collimated and efficient white light source for vehicle lighting, enhancing aesthetic appeal while meeting regulatory photometric requirements without the need for large optics, maintaining directivity and luminescence, and reducing component complexity.
Implementation Method 1
A vehicle light device utilizing a primary light source and a nonlinear optical medium to convert monochromatic light into a broad spectrum white light, maintaining collimation and directivity, comprising a wavelength conversion element with nonlinear optical effects, such as frequency mixing or Raman effects
Implementation Method 2
A vehicle light device utilizing a primary light source and a nonlinear optical medium to convert monochromatic light into a broad spectrum white light, maintaining collimation and directivity, comprising a wavelength conversion element with nonlinear optical effects, such as frequency mixing or Raman effects
Implementation Method 3
other embodiments provide an optical parametric oscillation process that provides a tunable spectrum of light wavelengths
Implementation Method 4
other embodiments provide a supercontinuum generation process that creates a broad spectrum light source
Data Source
AI summary
A vehicle light device includes a primary light source configured to emit first light having wavelengths in a first wavelength range, and a conversion element including an input end and an output end, the input end being optically coupled to the primary light source. The conversion element includes a nonlinear optical medium configured to convert at least a portion of the first light to second light having wavelengths shifted from the first light such that the output end outputs collimated light having a broad wavelength range including wavelengths of the first light and wavelengths of the second light. An outer lens is optically coupled to the output end of the wavelength conversion element and configured to transmit the output light as white light for illuminating a path of a vehicle.