Photo-thermal interference apparatus by using Herriott cell to measure aerosol absorption and method thereof
A photothermal interference and aerosol technology, which is applied in the measurement of phase influence characteristics, etc., can solve the problems of effective distance limitation and hindering the sensitivity of photothermal interference methods.
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[0068] Such as figure 1 As shown, the photothermal interference device and method for measuring aerosol absorption by using the Herriot cell includes a fiber carrier laser 1, an optical beam splitter 2 is provided on the transmission optical path of the fiber carrier laser 1, and the incidence of the fiber carrier laser 1 The light is divided into three beams by the optical beam splitter 2, and an optical isolator 3, an optical circulator 4 and an optical collimator are respectively arranged on the transmission optical path in front of the three beams. Three light collimators are located at the front end of the aerosol sample cell 10, and three flat high-reflective mirrors 8 parallel to the end face 6 of the light collimator are arranged at the back end of the aerosol sample cell 10 at equal distances. There is a Herriot cell 7, three beams of light are reflected and transmitted respectively on the end face 6 of the collimator, the reflected light returns along the original pat...
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