Design of multi-channel LED constant current driver in radiometric calibration light source

被引：0
|
作者：
Li H. [1 ]
Sui X. [1 ]
Yao Z. [1 ]
Chen Q. [1 ]
Gu G. [1 ]
机构：
[1] School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2022年 / 51卷 / 02期
关键词：
Integrating sphere; LED driver; Linear control; Radiometric calibration light source;
D O I：
10.3788/IRLA20210902
中图分类号：
学科分类号：
摘要：
In order to deal with the influence of the current stability controllability of LED array in integrating sphere radiometric calibration light source system on the spectrum matching degree at the opening of integrating sphere, a multi-channel, high-precision and high-stability LED current driving circuit was designed. This circuit was a voltage controlled constant current driving circuit, which can realize the linear control of LED array driving current by means of analog dimming. It took FPGA as the control core, read and wrote the AD5371 chip register through SPI interface, and realized high precision control of LED driving current through AD5371 digital-to-analog conversion circuit. The temperature control of LED array was realized based on circulating liquid refrigeration equipment and sink refrigeration base. The experimental results show that the current of LED array can be continuously and linearly adjustable in the range of 0-1 050 mA, and the current adjustment accuracy can reach 0.14% of the range. When the LED lamp holder temperature is controlled at 10 ℃, the LED output light spectral stability is 0.2%. Copyright ©2022 Infrared and Laser Engineering. All rights reserved.
引用
收藏
相关论文
共 10 条
  • [1] Liu Li, Gu Xingfa, Yu Tao, Et al., HJ-1 B thermal infrared band in-flight radiometric calibration and validation, Infrared and Laser Engineering, 41, 5, pp. 1119-1125, (2012)
  • [2] Zhu Jun, Li Yongchang, Bai Zhaoguang, Et al., Lunar calibration method through attitude maneuver of low-earth-orbit and high-resolution remote sensing satellites, Optics and Precision Engineering, 28, 9, pp. 1913-1923, (2020)
  • [3] Wang Shaoshui, Zhao Facai, Sun Quanshe, Research on brightness adjustable integral sphere light source technology and its application, Journal of Applied Optics, 41, 3, pp. 586-590, (2020)
  • [4] Gan Tao, Yuan Yinlin, Zhai Wenchao, Et al., Design and test of in-site radiometric calibration reference light source for spaceborne low light level remote sensors, Journal of Applied Optics, 41, 1, pp. 140-144, (2020)
  • [5] Wu Fupei, Xie Xiaoyang, Li Shengping, A thermal dissipation design method for LED array structure illumination, Chinese Optics, 14, 3, pp. 670-684, (2021)
  • [6] Wang Lihui, Solar spectrum synthesis technology based on LED array light sources, (2018)
  • [7] Huang Sijia, Yuan Yinlin, Zhai Wenchao, Et al., Design optimi-zation and performance test of infrared integrating sphere radiation source with wide dynamic range(Invited), Infrared and Laser Engineering, 50, 10, (2021)
  • [8] Liu Hongxing, Liu Zexun, Li Baoyong, Et al., Spectrum-tunable light source based on multi-sources, Optics and Precision Engineering, 22, 9, pp. 2345-2351, (2014)
  • [9] Wang Lingyun, Li Guangxi, Ma Yue, Et al., Study on simulation technology of multi-color temperature and multi-magnitude starlight source, Infrared and Laser Engineering, 50, 8, (2021)
  • [10] Li Yuan, Zhang Yong, Hu Liqin, Et al., Investigation of optical environment changes in the Dunhuang gobi-site of the Chinese radiometric calibration sites, Chinese Optics, 14, 5, pp. 1231-1242, (2021)
1