一、概述照度计是一种在农业上常用的测光仪器,它的探测器则是决定这种仪器精度的关键部件。目前,在照度计上被用作光电转换的各种光敏器件的光谱响应函数,都与国际上规定的视觉函数V(λ)有较大的偏差。因此,必须对其进行严格的修正,使它尽可能地接近视觉函数V(λ)。减色滤光技术在修正光敏器件的光谱响应 I. Overview Illuminometer is a commonly used in agriculture, metering equipment, its detector is to determine the accuracy of this instrument is a key component. At present, the spectral response functions of various light-sensitive devices that are used as photoelectric conversion on an illuminometer are greatly deviated from the international visual function V (λ). Therefore, it must be strictly modified so that it is as close as possible to the visual function V (λ). The subtractive color filter technique corrects the spectral response of the photosensitive device