Solar cell optical receiver and full luminous flux detection system with the same

Abstract

A group of solar cells are utilized as a light receiving device, and the advantages of low price and convenient arrangement due to smaller space required than integrating spheres of the solar cells are properly utilized; moreover, the light receiving device can effectively interpret light emitted from a light source to be tested such as an LED crystal grain or an LED module due to the low reflection coefficient of the solar cells and completely receives and converts luminous flux irradiated on the solar cells into electric energy for output; and spectral analysis is adopted for assistance soas to carry out compensating correction on frequency response unevenness of the solar cells, so a solar cell light receiving device with low cost and accurate detection numerical value and a total luminous flux detection system therewith are formed.

Description

technical field [0001] The invention relates to a light source total luminous flux detection system, in particular to a solar battery light receiving device and a total luminous flux detection system with the device. Background technique [0002] The total luminous flux of the light source (Total Luminous Flux, unit: lumen) is an important parameter in the application, especially in the application of light-emitting diodes (LEDs) where blue or violet LEDs are used as white LED light sources, it is an important value that must be considered . According to the CIE standard, the measurement of its total luminous flux must be as follows figure 1 As shown, the LED 2 to be tested is placed somewhere in a sufficiently large integrating sphere (Optical Integrating Sphere) 1, so that the light source to be tested placed inside it, such as the light emitted by the LED 2, is evenly distributed inside the integrating sphere 1 , let the light output to the spectral energy analyzer (Spe...

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Problems solved by technology

[0012] However, using this method to measure will still face the following two thorny problems: 1. The unincorporated amount of the 1' opening of the integrating sphere, if the light field of the light source to be measured is not cosθ distribution, the correction value will have a large Error value; especially when the light source to be tested is such as an incandescent lamp or a fluorescent lamp with a light angle facing all directions, the error cannot be ignored

Part of the luminous flux reflected back to the component will be reflected back into the integrating sphere 1', but it will vary depending on the surface condition of the LED 2' component to be tested. Even if the variation is only assumed to be 10%, it will be The measurement of LED luminous flux causes 9% variation, causing major difficulties in measurement accuracy

[0014] In other words, to correctly measure the full luminous flux of the light-emitting component to be tested, it is also necessary to consider the speed of the production line and the convenience of access to the light-emitting component to be tested. However, the current optical sensor is limited by its size and the combination is not easy, and the price is therefore greatly increased. increase; therefore, it will undoubtedly cause a dilemma for manufacturers of light-emitting components and manufacturers of light-emitting components

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