光学学报, 2019, 39 (8): 0808001, 网络出版: 2019-08-07
运动式太阳模拟器LED阵列光源及其准直光学系统设计 下载: 1083次
Design of LED Array Light Source and Collimating Optical System for Mobile Solar Simulator
几何光学 运动式太阳模拟器 LED阵列光源 边缘光线原理 准直光学系统 geometric optics mobile solar simulator LED array source principle of edge ray collimating optical system
摘要
运动式太阳模拟器是编码式太阳敏感器在装星阶段用于现场测试的一种重要设备,为敏感器测试提供模拟的太阳光信号和太阳光矢量信号。论述了运动式太阳模拟器的结构组成与工作原理,着重对其LED阵列光源和准直光学系统进行研究与设计。通过功率计算确定了LED数量,依据Sparrow判据分析了LED间距对辐照均匀性的影响,确定了阵列间距。基于边缘光线原理,建立了圆柱面镜的数学模型,设计了准直光学系统,借助LightTools软件进行仿真。实验结果表明:设计的运动式太阳模拟器在工作距离为50 mm处的辐照范围为10 mm×50 mm,最低辐照度为393 W·m
-2,在-13°、0°、38°三种光线入射角下的辐照不均匀度均优于±7.3%,出射张角为0.78°,满足编码式太阳敏感器装星后现场测试的要求。
Abstract
A mobile solar simulator is a requisite apparatus for conducting the field test prior to launching a coded solar-sensor-equipped satellite, which can provide simulated sunlight signal and sunlight vector signal for the test. This study provides a discussion on the structural configuration and working principle of the mobile solar simulator. Specifically, we present the description and design of the LED array light source and the collimating optical system in the device. For the light source, a power formula is applied to determining the number of LEDs, and the Sparrow criterion is considered to be the basis for analyzing the LED spacing. In particular, the array spacing is determined from the effect of irradiation uniformity. Furthermore, a mathematical model of cylindrical mirror is established based on the principle of an edge ray. The design and simulation of the collimating optical system are performed using the LightTools software. The experimental results denote that the mobile solar simulator has an irradiation area of 10 mm×50 mm, where the irradiance becomes 393 W·m
-2 at a working distance of 50 mm. Further, the irradiation nonuniformities at three incident angles of -13°, 0°, 38° are better than ±7.3%, and the exit angle is 0.78°. This solar simulator can complete the encoded solar sensor field test after the installation of a satellite.
苏拾, 王逸文, 张国玉, 张宇, 张健, 孙高飞, 刘石. 运动式太阳模拟器LED阵列光源及其准直光学系统设计[J]. 光学学报, 2019, 39(8): 0808001. Shi Su, Yiwen Wang, Guoyu Zhang, Yu Zhang, Jian Zhang, Gaofei Sun, Shi Liu. Design of LED Array Light Source and Collimating Optical System for Mobile Solar Simulator[J]. Acta Optica Sinica, 2019, 39(8): 0808001.