ホトダイオードアレーを用いた分光測光システムの試作
1980 年 29 巻 2 号 p. 115-121
詳細
1980 年 29 巻 2 号 p. 115-121
A self-scanning linear photodiode array of 512 elements (National MEL-512KV) was mounted at the focal plane of a 25-cm monochromator instead of the exit slit. It is capable of simultaneous measurements over a 40 nm region anywhere from 200 to 900 nm. A microcomputer was used to control the array and a versatile computer program was developed to utilize this system for various spectrochemical measurements. The signal to dark current ratio of the array was compared with that of a photomultiplier (R-106) over the useful wavelength range and the former was found to be less than 1/100 of the latter in the region below 400 nm. However, when the array was not cooled, it could be used with integration time of up to 5 s for quantitative measurements and 20 s for qualitative measurements.
