德拜-西爾斯效應 Debye-Sears Effect

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With the devices and materials in this set one can conduct experiments as an introduction into acousto-optics and the use of continuously emitted ultrasonic waves (continuous waves – cw). The focus here is upon the Debye-Sears effect and the imaging of a standing ultrasonic wave field using laser light.
With the cw generator SC600 ultrasonic waves of different frequencies can be generated in a water bath. The ultrasonic waves act like the elements of a diffraction grating, the grating constant of which depends on the wavelength of the ultrasound. When parallel laser light passes through, it is diffracted. A classic diffraction pattern, the Debye-Sears effect, results. By using different ultrasound frequencies and red and green laser light, the dependence of the interval of the orders of diffraction on the acoustic and optical wavelengths can be shown. If divergent laser light is used, a direct optical projection of the acoustic wave field can take place. By means of an acoustic absorber, the differences between travelling and standing ultrasonic waves can be demonstrated.
By supplementing the set with a photodiode receiver, it can be expanded into an ultrasound resonance cell. This is primarily used in measuring concentrations.

• 探索德拜-西爾斯效應與使用雷射對超聲波駐波場的成像
• 超音波的效應類似於繞射光柵，當平行光通過時，會發生繞射，並產生了經典的繞射圖案
• 透過使用不同的超音波頻率和不同顏色的雷射，可以顯示繞射級間隔對聲波和光波長的依賴性

包含內容

德拜-西爾斯效應

駐波的投影