Electrodeless Plasma Light Source for Solar Simulation
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Solution Overview
Problem
Current artificial light sources for simulating solar light in photo-degradation tests are inadequate, as they fail to replicate the full light power spectrum of solar light, particularly in the UV region, leading to inconsistent test results and limitations in achieving high-intensity UV irradiation without causing thermal degradation.
Innovation Solution
The use of an electrodeless plasma light source that emits a high intensity of UV light with a spectrum similar to solar light, minimizing infrared content to prevent thermal damage and allowing for accurate simulation of solar-induced degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional artificial light sources (xenon-arc lamp, metal-halide lamp) are used to simulate solar light, then the light power spectrum can be partially matched, but the UV light intensity is insufficient and the spectrum cannot be fully consistent with solar light
Solution Approach 1:
The patent changes the fundamental parameters of the light source by using plasma technology instead of conventional lamp discharge. The electrodeless plasma light source operates at different temperature and pressure conditions, generating a light spectrum that more closely matches solar radiation, particularly in the UV region, thereby achieving both high UV intensity and spectral consistency for reliable photo-degradation testing
Solution Approach 2:
The patent replaces the conventional lamp-based mechanical discharge system with an electrodeless plasma system. This substitution eliminates the need for physical electrodes and traditional lamp structures, using electromagnetic field-induced plasma to generate light. This new mechanism produces a more accurate solar spectrum simulation while enabling higher UV intensity output
2Productivity
If high-intensity UV light is used to accelerate photo-degradation testing, then the test duration can be reduced, but thermal degradation may occur causing inaccurate results
Solution Approach 1:
The patent applies local quality by creating a light source with non-uniform spectral distribution that matches solar radiation characteristics. The electrodeless plasma light source emits concentrated UV energy in specific wavelength bands while maintaining lower intensity in the infrared region, allowing accelerated testing without excessive thermal accumulation on the test specimen
Solution Approach 2:
The patent changes the thermal parameters of the light source by using plasma excitation instead of incandescent heating. This results in a light source that emits high UV intensity without the corresponding thermal load, enabling accelerated photo-degradation testing without causing thermal degradation of the test materials
3Duration of action of stationary object
If conventional lamp light sources are used, then the device structure is simple, but the lifespan is limited and replacement frequency is high
Solution Approach 1:
The patent extracts and eliminates the vulnerable components of conventional lamp systems by removing the electrodes and lamp envelope. The electrodeless plasma light source generates light directly through electromagnetic field-induced plasma in a controlled chamber, eliminating the parts that typically fail first in conventional lamps, thereby extending system lifespan
Solution Approach 2:
The patent creates a simplified model of solar radiation using plasma physics principles. By copying the essential characteristics of solar UV emission through controlled plasma excitation of gas molecules, the system achieves solar-like output without the complexity and limited lifespan of conventional lamp-based simulation systems
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 approach enables a highly accelerated photo-degradation test with accurate simulation of solar light effects, reducing thermal damage and extending the lifespan of the light source, thereby improving test reproducibility and reducing costs.
Implementation Method 1
a light source, which is abundant in UV light and short-wavelength visible light, but which has a low ratio of infrared light, that is, an electrodeless plasma lamp
Implementation Method 2
The degradation of the polymer by UV light is generated when the polymer absorbs the light energy corresponding to the energy destructing the main chain of the polymer
Data Source
AI summary
Disclosed is a test apparatus of accelerated photo-degradation measuring a degradation caused by photo-degradation in a material or a product by light containing UV light and visible light that simulate the solar light-inducing degradation. The apparatus includes a light irradiating unit configured to irradiate light using at least one electrodeless plasma lamp; a light condensing unit configured to collect light emitted from the light irradiating unit and irradiate the light uniformly into the surface of the specimen for the material or the product; and a specimen holder configured to fix the specimen, and the specimen holder being fixed at a predetermined position or rotated. Further, the at least one electrodeless plasma lamp generates light having a light power spectrum similar to a solar light in a region of UV light and short-wavelength visible light corresponding to a range of about 300-500 nm.