The solar simulation system replicates the characteristics of solar radiation through precise optical and electronic systems, providing a standardized lighting environment for scientific research and industrial testing. Its core components can be divided into four modules: light source system, optical processing system, control system, and heat dissipation system. The functions and technical characteristics of each module are as follows:

1、 Light source system: simulating the energy core of solar radiation

The light source is the core of the solar simulator, which needs to meet three major requirements: wide spectral coverage, high stability, and long lifespan. The mainstream types of light sources include:

1. Xenon lamp

Features: The short arc xenon lamp spectrum covers 200-2500nm, and the visible light band of 300-800nm matches the solar spectrum by over 85%. The color temperature is about 6000K. However, there are characteristic peaks in the 0.8-1.0 μ m infrared band, which need to be suppressed with gallium arsenide filters.

Application: High precision photovoltaic testing (such as solar cell I-V curve measurement), aerospace thermal balance testing.

Lifespan: 1000-2000 hours, requiring a water cooling system for heat dissipation.

2. LED array

Features: Composed of 20-50 specific wavelength LEDs (300-1800nm), the band power is adjusted through independent driving, and the spectral matching degree reaches Class A (deviation ≤ 20%). The lifespan exceeds 100000 hours, the energy consumption is only 30% of xenon lamps, and the response time is ≤ 1ms.

Application: Customized scenarios (such as photocatalytic reactions, plant growth research), dynamic spectral adjustment testing.

Advantages: Modular scalability, supporting large-area uniform lighting.

3. Halogen lamps

Features: Based on tungsten wire iodine vapor cycle, the spectrum covers 300-2600nm, with infrared energy above 600nm accounting for 60%, suitable for high-temperature sunlight simulation. The cost is 1/5 of xenon lamps, but the energy in the ultraviolet band is insufficient and needs to be compensated by ultraviolet enhancement modules.

Application: Low precision weather resistance testing (such as building material aging testing), evaluation of automotive interior materials.

2、 The Optical Processing System of Solar Simulation System: The Key to Shaping the Distribution of Light Field

The optical system converts the light source output into uniform and parallel simulated sunlight through three steps: filtering, uniform light, and collimation

1. Filtering system

AM series filter: a core correction component that calibrates the light source spectrum to the standard solar spectrum. Real time monitoring through high-resolution spectrometer, dynamically adjusting filter combinations or light source power to ensure spectral matching deviation of ≤± 25%.

2. Uniform light system

Integral sphere uniform light: 300-1000mm PTFE coated integral sphere (reflectivity ≥ 98%), with a spot uniformity of ± 1.5%, suitable for small area samples (such as solar cells).

Lens array uniform light: 10 × 10 unit micro lenses are divided and stacked to achieve large-area irradiation of ≥ 1m × 1m, with edge and center deviation of ≤± 5%, suitable for photovoltaic module testing.

3. Alignment system

Achromatic lens group: with a focal length of 500-1000mm, the beam divergence angle is controlled within ± 0.5 ° to ensure consistent light reception for large-sized samples (such as car exteriors).

Parabolic mirror collimation: Used for LED light sources, it forms parallel light spots through multiple reflections of light within the mirror surface, simulating "infinite" solar radiation.

3、 Solar simulation system control system: the 'brain' that precisely regulates the light environment

The control system achieves real-time adjustment and monitoring of light source parameters through automation equipment or computer programs

1. Parameter adjustment

Support flexible adjustment of light intensity, spectral distribution, and illumination time (pulse or steady state).

For example, in photocatalytic material testing, specific wavelength bands (such as the ultraviolet region) can be strengthened to accelerate the reaction; In the verification of intelligent driving in automobiles, simulate the scene of sudden changes in strong light at tunnel entrances and exits.

2. Status monitoring

Real time collection of parameters such as light intensity, spectrum, temperature, humidity, etc., to ensure stable simulation conditions within the preset standard range.

For example, in aerospace thermal balance tests, combined with humidity control, the effect of long-term space residency on material aging is studied.

4、 Sunlight simulation system cooling system: the "guardian" to ensure stable operation of equipment

Long term operation of the light source will generate a large amount of heat, which needs to be efficiently dissipated through air or water cooling devices:

1. Xenon lamp heat dissipation

Adopting a water-cooled circulation system, with a temperature difference of ≤ 5 ℃ and a temperature control accuracy of ± 0.5 ℃, to avoid the exacerbation of infrared peak due to temperature rise.

2. LED heat dissipation

Using microchannel heat dissipation technology to prevent spectral drift and ensure the stability of multi band LEDs.