在滤光光电比色计中,最常用的光源(如581-G型光电比色计)是钨丝灯泡,它所发出的光是混合光。由于滤光片既能吸收也能透过一定波长的光,故将混合光通过一块滤光片时,在分光光度计上测量其透光率,然后以波长为横坐标,透光率为纵坐标作图,就可以得到这块滤光片的透光率曲线(如图1)。 In the filter photoelectric colorimeter, the most commonly used light source (such as the Model 581-G photoelectric colorimeter) is a tungsten bulb, the light it emits is mixed light. As the filter can absorb both light and also through a certain wavelength of light, so the mixed light through a filter, the light transmittance measured on a spectrophotometer, and then the wavelength of abscissa, the light transmittance of vertical Coordinate mapping, you can get the transmittance of this filter curve (Figure 1).