background luminance

基本解释

The principle for testing the image tube luminance and background is discussed. The constitution of the instrument and processing methods of test data are introduced.
论述像管亮度增益与背景测试仪的原理，介绍仪器的组成以及测试数据的处理方法。
Objective To evaluate the lasting time of background luminance difference of the fixation target between two eyes because of dark adaptation under routine subjective refraction.
目的探讨在常规主觉验光环境下，暗适应造成的双眼前视标背景亮度差异的持续时间。
Object: To evaluate mesopic contrast threshold under 3 kinds of background and to explore the effect of adaptation time, adaptation luminance and glare on contrast threshold of humans eye.
目的评估3种背景环境下的中间视觉对比度阈值，并探讨暗适应时间、背景亮度和眩光对人眼对比度阈值的影响。