Sunlight simulation testing device and light source module for same

Abstract

A light source module for a sunlight simulation device comprises a plurality of light emitting diodes, a group of dodging devices, at least one group of angular diverging plates and angular converging plates. Central wavelengths of the light emitting diodes are different from one another; each dodging device comprises a dodging cavity with at least six surfaces, at least one of the surfaces of the dodging cavity is an incident surface, one of the rest surfaces of the dodging cavity is an emergent surface, a plurality of transparent holes corresponding to the light emitting diodes are formed on each incident surface, the reflectivity of the light emergent surface is larger than the light transmittance of the light emergent surface, the dodging cavity is made of light transmitting materials, and total reflecting layers are formed on all the surfaces, except for the emergent surface, of the dodging cavity; the angular diverging plates are arranged on outer sides of the incident surfaces and are used for diverging light beams generated by the light emitting diodes and enabling each light beam to enter the corresponding dodging cavity via the corresponding transparent holes by a deflection angle of refraction; and the angular converging plates are arranged on outer sides of the emergent surfaces. Owing to the angular diverging plates, the light beams entering the dodging cavities can be uniformly transmitted outwards after being reflected and mixed by multiple times, and an excellent dodging effect is achieved.

Description

【Technical field】 [0001] The invention relates to a light source module for a sunlight simulation device and a sunlight simulation testing device using the module. 【Background technique】 [0002] Among the common clean energy sources at present, the use of solar cells to generate electricity is an extremely important part. The power generation efficiency of solar cells is currently the most important indicator for measuring the quality of solar cells; therefore, the device for testing the power generation efficiency of solar cells must be very accurate; and the most important part of the test device is the light source that simulates sunlight. Since the spectrum and illuminance of sunlight will vary with factors such as geographical location, season, cloud cover, and air quality, in order to simplify and standardize the test environment, the AM-1.5G proposed by the US IEC or JIS is used for testing. standard to make simulated light sources. [0003] In this standard, three...

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Problems solved by technology

Also because the half-power angle of the light field of the cannonball-type LED is very small, in the module 10, the light mixing effect of the LEDs of different wavelength bands is not good, so the uniformity of the wavelength distribution is very poor, which is similar to that of Class A sunlight. The 98% uniformity required by the simulation device is far away, so so far, there is no LED sunlight simulation device that can reach Class A.

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