By use of the simple double-light path measuring principle, the signals from a testing light path and a reference light path are processed with an electro-optical signal processing system and are then scut into a analog divider to measure the glass transmissvity.
采用简单的双光路测量原理，将测试光路和参考光路的光信号，经各自的光电信号处理系统处理后送人模拟除法器。
