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Sound signal detector based on surface wave, and reflection type photoacoustic microscope

A photoacoustic microscope and acoustic signal technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problem of narrow detection bandwidth of the detector, and achieve the effect of imaging detection and detection sensitivity

Active Publication Date: 2016-11-09
SHEN ZHEN SHEN GUANG SU TECH CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a surface wave-based acoustic signal detector and a reflective photoacoustic microscope, aiming to solve the problem of narrow detection bandwidth of existing detectors

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  • Sound signal detector based on surface wave, and reflection type photoacoustic microscope
  • Sound signal detector based on surface wave, and reflection type photoacoustic microscope
  • Sound signal detector based on surface wave, and reflection type photoacoustic microscope

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] An acoustic signal detector based on surface waves includes a prism with two parallel planes, one of the two parallel planes is coated with a thin film, and the thin film is used to detect photoacoustic signals transmitted through a medium.

[0047] The acoustic signal detector based on the surface wave is based on the principle of total internal reflection, using the high-sensitivity sensing principle of the surface wave, and the photoacoustic signal transmitted through the medium can be detected by using a thin film coated on one of the two planes parallel to each other. .

[0048] In thi...

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Abstract

The present invention belongs to the technical field of photoacoustic imaging sound pressure detection, and provides a sound signal detector based on surface wave, and a reflection type photoacoustic microscope. The sound signal detector comprises a prism having two planes parallel to each other, wherein one of the two planes is plated with a thin film, and the thin film is used for detecting a photoacoustic signal transmitted through a medium. According to the present invention, the sound signal detector uses the optical sensing refractive index, such that the object to be measured has the characteristic of the non-marking and non-contact sensing detection, and the advantages of bandwidth detection and sensitive detection can be achieved; and with the application of the sound signal detector based on the surface wave in the reflection type photoacoustic microscope, the imaging detection of the biological living body can be achieved.

Description

technical field [0001] The invention belongs to the technical field of photoacoustic imaging sound pressure detection, and in particular relates to a surface wave-based acoustic signal detector and a reflective photoacoustic microscope. Background technique [0002] It is the current mainstream to use the piezoelectric method (the instrument is called an ultrasonic transducer) to extract the sound pressure signal. Many research groups use piezoelectric detectors for photoacoustic imaging research and have achieved fruitful research results. Although the technology is relatively mature and has a wide range of applications, it also has some shortcomings that are difficult to overcome. For example, this technology cannot achieve high sensitivity and high frequency detection at the same time. Using piezoelectric crystals to receive ultrasonic signals, the sensitivity and the receiving frequency are contradictory. The smaller the area of ​​the piezoelectric crystal, the higher t...

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Application Information

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IPC IPC(8): G01N21/17
CPCG01N21/1702
Inventor 张崇磊邢飞闵长俊袁小聪
Owner SHEN ZHEN SHEN GUANG SU TECH CO LTD
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