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Investigative and diagnostic methods and procedures based on the photoacoustic effect, which is the generation of SOUND WAVES from the absorption of ELECTROMAGNETIC RADIATION.
A hemispherical photoacoustic cell and a gas detection method
ActiveCN119959147BRequirements to reduce spot qualitylow costMaterial analysis by optical meansResonant cavityMedicine
This invention relates to the field of optical spectroscopy, specifically providing a hemispherical photoacoustic cell and a gas detection method. The hemispherical photoacoustic cell includes a cell body, a base, and a lamp plate. The cell body is provided with a resonant cavity, a resonant chamber, and an air vent. The resonant cavity is a hemispherical groove, and the resonant chamber has a through-hole structure. The resonant chamber is connected to the resonant chamber through a connecting hole. The resonant cavity and the resonant chamber have the same resonant frequency. The air vent penetrates the cell body and is connected to the resonant chamber. The base is fixedly connected to the cell body and is located at the opening of the resonant chamber to block it. The lamp plate is fixedly connected to the base and is located at the opening of the cell body. The lamp plate is provided with a light-emitting component to generate light with a preset wavelength, frequency, and intensity. A microphone is used to pick up the photoacoustic signal within the resonant chamber. This invention can effectively reduce the cost of photoacoustic gas measurement.
Owner:NINGBO CORE OPTOELECTRONICS TECH CO LTD