Portable three-dimensional visual photoacoustic imaging system

A photoacoustic imaging, portable technology, applied in the direction of material analysis, measuring device, instrument, etc. by optical means, can solve the problems of low peak power, large mechanical vibration, complicated operation, etc., achieve small mechanical vibration, improve detection time, The effect of low scan inertia

CN102636434AInactive Publication Date: 2012-08-15曾吕明 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-08-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a portable three-dimensional visual photoacoustic imaging system, which comprises a central processing unit, a driving circuit, a data acquisition circuit, a signal amplification circuit, a signal pre-processing circuit, an ultrasonic sensor, an external circuit interface, laser diodes, a collimating lens group, a beam expanding lens group, a focusing lens group, an X-axis reflecting galvanometer, a Y-axis reflecting galvanometer, a field lens, a linear motor, an X-axis motor, a Y-axis motor and a shell. Fast and efficient three-axis scanning galvanometer technology is applied to the field of photoacoustic stimulation. The portable three-dimensional visual photoacoustic imaging system is integrated with the laser diodes, so that portable three-dimensional visual photoacoustic imaging can be realized. Besides, the portable three-dimensional visual photoacoustic imaging system can be widely applied to the field of material detection, industrial flaw detection, medical imaging and the like of complex structures such as square structures, tubular structure, film type structures and the like.
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Description

technical field

[0001] The invention relates to a photoacoustic imaging technology, in particular to a portable three-dimensional visualized photoacoustic imaging system. Background technique

[0002] Photoacoustic technology combines the advantages of high contrast of pure optical imaging and deep penetration of pure ultrasound imaging, which can provide high contrast and high resolution detection images, and has the characteristics of no radiation damage, low cost, safe and convenient use, especially It is the rapid development of three-dimensional photoacoustic imaging technology, and it is considered to be the preferred method for various non-destructive visual inspection imaging in the future.

[0003] The Chinese Invention Patent Application Publication (publication number CN 101813672A) discloses a fast three-dimensional photoacoustic imaging system and method based on an area array ultrasonic detector. Photoacoustic imaging. This technology does not require detecto...

Examples

Embodiment 1

[0018] Embodiment 1 The structure of this embodiment is as follows figure 1 As shown, the names of the components are: 1. Central processing unit, 2. Driving circuit, 3. Data acquisition circuit, 4. Signal amplification circuit, 5. Signal preprocessing circuit, 6. Ultrasonic sensor, 7. External interface of the circuit, 8. Laser diode, 9. Collimating lens group, 10. Beam expander lens group, 11. Focusing lens group, 12. X-axis mirror, 13. Y-axis mirror, 14. Field mirror, 15. Linear motor , 16. X-axis motor, 17. Y-axis motor, 18. shell.

[0019] Among them, the light source 1 is a pulsed semiconductor laser diode (PGAS1S24, Hoffo), the working wavelength is 905nm, the peak power is 49W, the pulse width is 150ns, and the single pulse energy is about 7.3uJ; the ultrasonic sensor 6 is a 1-3 composite of 256 array elements Material linear array probe (manufactured by Guangzhou Doppler Electronic Technology Co., Ltd.), with a center frequency of 3.5MHz, a relative bandwidth of up t...

Embodiment 2

[0029] Example 2 A portable three-dimensional visual photoacoustic imaging system, which is similar in structure to Example 1, the difference is that the ultrasonic sensor 6 adopts the unit angle probe (2.5P9×9K1) produced by Guangzhou Doppler Electronic Technology Co., Ltd., its The center frequency is 2.5MHz, the size is 9mm×9mm, and the external interface adopts Q9 (BNC) interface.

Embodiment 3

[0030] Example 3 A portable three-dimensional visual photoacoustic imaging system, which is similar in structure to Example 1, the difference is that the ultrasonic sensor 6 is a two-unit oblique probe (5P6×6K3) produced by Guangzhou Doppler Electronic Technology Co., Ltd. Its center frequency is 5MHz, the size is 6mm×6mm, and the external interface adopts Q9 (BNC) interface.