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炭锥能量计(炭斗)一般是采用光校准,原理如图1。其计算公式为:W=P(πR~2/d~2)t。式中 W 表示输入到激光卡计里的校准光能;P表示标准灯在使用电流下单位立体角内的发光功率;R 为光栏的半径;d 为标准灯灯丝平面到接收器的距离;t 为曝光时间。
Carbon cone energy meter (carbon bucket) is generally used optical calibration, the principle shown in Figure 1. The calculation formula is: W = P (πR ~ 2 / d ~ 2) t. Where W represents the calibration light input into the laser card meter; P represents the luminous power of the standard lamp in the solid angle of the unit under the current used; R is the radius of the light bar; d is the distance from the standard lamp filament plane to the receiver; t is the exposure time.