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    • 3. 发明授权
    • Two beam alternating light colorimeter
    • 双光束交替光色度计
    • US4283142A
    • 1981-08-11
    • US108461
    • 1979-12-31
    • Hubert De SteurChris VandenbosscheGuido Heyneman
    • Hubert De SteurChris VandenbosscheGuido Heyneman
    • G01N21/27G01J1/36G01J3/08G01J3/42
    • G01J1/36
    • A two beam alternating light colorimeter is disclosed wherein a light beam passing through a lens system having a shutter is periodically deflected by a pivoting mirror. In a first non-deflecting position of the pivotable mirror a first measuring beam is created which passes through a first measuring cell and is guided to a common photo cell. In a second deflecting position of the mirror a second measuring beam is created which is guided through a second measuring cell to the same photo cell. Signals from the photo cell are connected through a controlled switching element to an analog memory. A computing circuit is provided which connects to an output of the analog memory and also to the photo cell. The switching element connects the first measuring signal to the analog memory when the mirror is in a non-deflecting position and opens when the mirror is in a deflecting position. The computing circuit compares the signals corresponding to the first and second measuring beams.
    • 公开了一种双光束交替光色度计,其中通过具有快门的透镜系统的光束由枢转反射镜周期性地偏转。 在可枢转镜的第一非偏转位置中,产生通过第一测量池并被引导到公共光电池的第一测量光束。 在反射镜的第二偏转位置中,产生第二测量光束,其被引导通过第二测量单元到相同的光电池。 来自光电池的信号通过受控的开关元件连接到模拟存储器。 提供了一种连接到模拟存储器的输出端以及光电池的计算电路。 当反射镜处于非偏转位置时,开关元件将第一测量信号连接到模拟存储器,并且当反射镜处于偏转位置时打开。 计算电路比较对应于第一和第二测量光束的信号。