一种用于LED特性检测的实验仪器的研究

介绍了一种基于微型光纤光谱仪的LED特性检测仪器的设计原理。为了降低积分球测量光通量中所引起的自吸收误差与温度升高对LED光通量的影响误差,选取将LED与探测器成90°放置的解决方法。同时,光谱仪模块采取非对称交叉式Czerny-Turner分光结构来达到微型化高分辨率的目的。基于正向电流对LED光通量的影响,提出可调可显示的恒流源的设计。研究结果对研制检测LED特性的微型检测装置具有一定的指导意义,由于恒流源电流的可读可调节的设计,电流变化对LED光学特性的影响可以较为清晰地体现出来。

A research of laboratory instrument for LED property measurement

A design principle of LED features detection equipment based on micro fiber optic spectrometer is introduced. To reduce the self-absorption error caused by measuring luminous flux from integrating sphere and the error of LED luminous flux caused by temperature increasing, the LED is placed with the detector into 90° to solve the problem. Meanwhile, in order to achieve the goal of miniaturization high-resolution, the fiber optic spectrometer module uses non-symmetrical cross Czerny-Turner spectral structure. A design of the adjustable constant current source is purposed based on the influence of LED luminous flux by forward current. The results show that the research has certain guiding significance in developing micro LED features detection equipment. Since the constant current source is adjustable and can be displayed, the influence of LED optical features by current changing can be clearly observed.