Abstract:
A deep UV tunable narrow-passband light source module for the nitrate measurement system is proposed and demonstrated in this paper. The module consists of a deuterium lamp, an angle rotation stage, a motorized filter wheel, the deep UV optical filters with different central wavelengths, as well as the collimating lens. Seven UV filters with different central wavelengths of 220 nm, 230 nm, 240 nm, 250 nm, 260 nm, 270 nm and 280 nm are placed on the filter wheel. Based on the principle of multiple-beam interference, the central wavelength of the transmission light and the rotation angle are regressed and calibrated to obtain the relationship model. The experiment results demonstrate that with the rotation angle from 0 to 30°, each filter can realize wavelength tuning range of 10 nm. In addition, the designed deep UV tunable light source module can obtain monochromatic light with the wavelength ranging from 212 nm to 280 nm, which meets the measurement requirements of the nitrate in seawater.
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Abstract: A deep UV tunable narrow-passband light source module for the nitrate measurement system is proposed and demonstrated in this paper. The module consists of a deuterium lamp, an angle rotation stage, a motorized filter wheel, the deep UV optical filters with different central wavelengths, as well as the collimating lens. Seven UV filters with different central wavelengths of 220 nm, 230 nm, 240 nm, 250 nm, 260 nm, 270 nm and 280 nm are placed on the filter wheel. Based on the principle of multiple-beam interference, the central wavelength of the transmission light and the rotation angle are regressed and calibrated to obtain the relationship model. The experiment results demonstrate that with the rotation angle from 0 to 30°, each filter can realize wavelength tuning range of 10 nm. In addition, the designed deep UV tunable light source module can obtain monochromatic light with the wavelength ranging from 212 nm to 280 nm, which meets the measurement requirements of the nitrate in seawater.
