brightness test chart

例句：

1. 1.The brightness test chart is used to measure the brightness of a light source.
   亮度测试图表用于测量光源的亮度。
2. 2.The engineer used the brightness test chart to determine the optimal settings for the lighting system.
   工程师使用亮度测试图表来确定照明系统的最优设置。
3. 3. The brightness test chart was used to compare the performance of different lighting systems.
   亮度测试图表被用来比较不同照明系统的性能。