Photoacoustic sensing device and method
A technology of acoustic sensing and photoacoustic signals, applied in measuring devices, color/spectral characteristic measurement, material analysis through optical means, etc., can solve the problems of weak photoacoustic signals and low efficiency of sound field detection, and achieve strong universal application Sexuality, performance improvement, and effects of avoiding photothermal noise
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[0041] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments. It should be clear to those skilled in the art that the specific implementation is only to help understand the present invention, and should not be regarded as a specific limitation on the present invention.
[0042] The multi-pass pool of the present invention is designed using spherical aberration theory, and the multi-pass pool is composed of two spherical reflectors (reflector I1 and reflector II2), as figure 2 with 4 Shown; Two spherical reflectors are respectively fixed on the cage plate 10 by a cage structure, the cage structure is as Figure 4 shown. The design of the multi-pass cell should follow the following rules: 1) the excitation beam folded multiple times must be distributed on a plane to ensure that the vibration arm gap can pass through the quartz tuning fork 3; 2) due to the limited length o...
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