发光二极管(LED)的光强空间分布特性决定了它能否满足特定场合的应用。大功率LED由于发热量大,其绝对光强空间分布(LISD)的测试也必须在特定热沉温度下进行才能得到准确可靠的结果。设计了一个可对大功率LED进行热沉温度控制且快速实现LISD自动测试的系统。该自动测试系统基于LEDGON-100测角光度计及其高精度的二维旋转台,配合测试适配器、温度控制器、光度探头、Keithley 2400源表和测试软件组成。测试软件基于Delphi程序语言开发。在控温条件下,该LISD自动测试系统稳定可靠,测试时间大大缩短,测试结果实时直观。利用该自动测试系统对具有朗伯型和蝙蝠翼型两大LISD类型的LED进行测试,获得它们的二维LISD和三维LISD。实验结果表明:随着热沉温度的增加,光强绝对值下降,而相对LISD却不变。 Light-emitting diode (LED) spatial distribution of light intensity determines whether it can meet the requirements of a particular application. High-power LED due to heat, its absolute spatial distribution of light intensity (LISD) test must also be carried out at a specific heat sink temperature in order to get accurate and reliable results. A system that can control the heat sink temperature of high power LED and quickly realize the automatic test of LISD is designed. The automatic test system is based on the LEDGON-100 goniometer and its high-precision 2D turntable with a test adapter, temperature controller, photometric probe, Keithley 2400 source and test software. Test software based on Delphi programming language development. Under the conditions of temperature control, the LISD automatic test system is stable and reliable, the test time is greatly shortened, and the test results are real-time and intuitive. Using this automated test system, two LISD-type LEDs with Lambertian and batwing airfoils were tested to obtain their two-dimensional LISD and three-dimensional LISD. The experimental results show that with the increase of heat sink temperature, the absolute value of light intensity decreases, while the relative LISD does not change.