Optical sensor for fluid analysis

摘要

A sensor for measuring a concentration of a particular ion, molecule or atom in a fluid includes a sample handling portion for providing at least some of the fluid, a first photo-detection device, and a first light source. The first photo-detection device is configured to measure a power of light incident thereon, and the first light source includes a solid-state light emitting device. The first light source is configured to emit light having a wavelength less than 240 nanometers incident on the fluid provided by the sample handling portion, and the first photo-detection device is configured to receive light having passed through the fluid.

主权项

1. A sensor for measuring a concentration of one or more types of ions, molecules or atoms in a fluid, comprising:
a first photo-detection device configured to measure a power of light incident thereon; and a first light source including a solid-state light emitting device, the first light source configured to emit light having a wavelength less than 240 nanometers incident on the fluid, and the first photo-detection device configured to receive light having passed through the fluid, wherein the first light source further includes a frequency converting element arranged to receive light emitted from the solid-state light emitting device, wherein the frequency converting element is configured to convert the light emitted by the solid-state light emitting device to frequency-converted light with a wavelength less than 240 nanometers, and wherein a frequency conversion process of the frequency conversion element is one of second harmonic generation, third harmonic generation, fourth harmonic generation, fifth harmonic generation, sum frequency-generation or difference frequency-generation and the frequency-conversion process is not phase-matched for frequency-converted light with wavelengths less than a first wavelength and greater than a second wavelength.