Selenium cell ( eg the exposure meter of a camera) 硒光电池(如照相机曝光计中的)。
Exposure meter: An instrument which measures light intensity and provides information for proper exposure. Calibrated for different emulsion speeds. 曝光表:测量光的强度,并根据不同乳剂的感光速度,提供标准曝光时间的仪器。
The amateur astronomer must consult the exposure meter and not rely on his senses. 业余天文学家必须参照曝光表而不能光靠感觉。
Manual exposure camera all have build in light meter which tell you exactly what exposure you have to set. 手动曝光相机都装有曝光表,说明应设定多少曝光时间。
It is a Wonder View model in a brown leather case and there is an exposure meter in case attached. 照相机是美景牌的,装在棕色的皮套里,另外还带有一个装曝光表的盒子。
A Direct-Reading Electroscope Type Pocket Exposure Meter 直读式验电器型袖珍照射量计
Methods SH-126 recording sound level meters were applied to measure noise exposure individually in two groups of air compressor operators for each workday. At same time working environmental noise levels in the two workshops were also measured using the sound level meter with traditional way. 方法采用SH126记录式声级计测量两组空压工在不同工作日内的噪声暴露,同时用声级计按经典方法在典型工作位多点测量噪声水平。
The monitoring ionization chamber for the calibration of exposure meter 用于照射量仪校准工作的监测电离室
Conclusion Dosimeter can be used to dynamically measure the real individual exposure level of noise for textile workers, the results measured by dosimeter may be equal or higher than those by traditional sound pressure levels using sound level meter. 结论噪声个体计量仪可以连续动态记录挡车工的实际噪声暴露,其结果高于或等于声级计定点测量结果。
This paper presents the construction, the performance, and the usage of a thin window monitoring ionization chamber used for the calibration of X ray exposure meter. As regards repeatability, the discrepancy of data from the chamber is within 0 2%; 本文描述用于照射量仪校准工作的薄窗监测电离室的结构、性能及使用方法.就重复性而言,电离室的读数在0.2%以内相符;
FJ-407 Personal Exposure Meter FJ-407型个人照射量计
The factors that influence the accuracy of digital imaging luminance measurement, such as imaging scaling, nonlinearity correction, multiple exposure, are numerically simulated and discussed. The results can be used for the design of digital imaging luminance meter. 对影响数码成像亮度测量精度的成像定标、非线性校正、多重曝光等几种方法进行了模拟和讨论,为数码成像亮度仪的设计提供了理论依据。
An environmental γ-ray exposure rate meter with gating mode 选通式环境γ照射量率仪
The relative error of in line exposure meter calibration is less than 1% at moderate filtering, no greater than 2% at heavy filtering. 用于校准现场仪器时,在中等过滤的情况下误差小于1%,重过滤下不大于2%。