Light Source System Uniform Brightness via Scattering and Wavelength Conversion
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Solution Overview
Problem
Traditional light source systems produce non-uniform brightness of light spots on far-field screens due to defects in their design.
Innovation Solution
A light source system comprising a laser light source, transflective optical component, lenses, scattering surface, excited light generator, relay lens, and aperture, where the positions and distances of these components are adjustable to ensure the light spots formed by different wavelength ranges coincide, resulting in uniform brightness and pure color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional ellipsoid bulb and collimating lens system is used, then the structure is simple, but the brightness of the light spot on the far-field screen is not uniform
Solution Approach 1:
The patent divides the light generation system into multiple independent modules: laser light source, transflective optical component, first light path with scattering surface, second light path with wavelength conversion, and combining optics. Each module independently processes specific wavelength ranges, allowing precise control over the spectral composition and spatial distribution of the final light output, thereby achieving uniform brightness while maintaining reasonable structural complexity
Solution Approach 2:
The patent merges multiple light paths (first light path with scattered light and second light path with wavelength-converted light) into a single combined beam through the transflective optical component and subsequent combining lenses. This merging of separate optical paths with different functions enables the system to achieve uniform brightness distribution by combining light from multiple independent sources
2Illumination intensity
If multiple light paths with different wavelengths are combined, then the light spot brightness can be improved, but the light spots from different wavelengths may not coincide, causing deviation and dispersion
Solution Approach 1:
The patent incorporates an adjusting mechanism that allows for precise alignment and coincidence of light spots from different wavelength paths. The system includes adjustable lenses and optical components that can be positioned to ensure that the first light (scattered) and second light (wavelength converted) converge at the same location on the far-field screen, eliminating deviation and dispersion while maintaining high brightness
Solution Approach 2:
The patent employs movable and adjustable optical components (lenses, mirrors, and the transflective optical component) that can be dynamically positioned during system setup and maintenance. This dynamic adjustability enables precise control over the convergence points of different wavelength paths, ensuring perfect coincidence of light spots and eliminating dispersion effects
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 a light spot of uniform brightness and pure color on the far-field screen by minimizing the radius of the light spots and ensuring complete coincidence of the first and second light sources, thereby overcoming issues of deviation and dispersion.
Implementation Method 1
a laser light source configured to emit light in a first wavelength range
Implementation Method 2
is configured to reflect a part of the light in the first wavelength range to form first light, and is configured to transmit a part of the light in the first wavelength range to form second light
Implementation Method 3
the first light is guided by the set of first lenses to the scattering surface to form scattered light
Implementation Method 4
the second light is guided by the set of second lenses to the excited light generator, which generates light in a second wavelength range under excitation
Data Source
Figure 1~2
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AI summary
A light source system includes a laser light source (10), a transflective optical component (11), a set of first lenses (12), a scattering surface (13), a set of second lenses (14), an excited light generator (15), a relay lens (16), an aperture (17), and a lens (18). The laser light source generates light in the first wavelength range irradiating onto the transflective optical component. The transflective optical component reflects a part of the light in the first wavelength range to form first light and transmits a part of the light in the first wavelength range to form second light. The scattered light formed by the first light being scattered on the scattering surface is of uniformly distributed light intensity and converges with the light in the second wavelength range generated by the excited light generator under excitation of the second light to form output light, which is of uniform brightness. Therefore, the light source system of the present embodiment forms output light of uniform brightness, and forms a light spot of uniform brightness on the far-field screen. A light source adjusting method is further provided, which can minimize a light spot formed on the far-field screen by the light source system by performing an adjustment and achieve complete coincidence of the first light and the second light, thereby forming a light spot of uniform brightness.