The new "forbidden"nearfield optical microscope can obtain three images simultaneously, namely shear force image, forbidden light image and allowed light image.
The distributed source boundary point method(DSBPM) based nearfield acoustic holography(NAH) is used for identifying and localizing noise sources of the roots vacuum pump.
采用基于分布源边界点法的近场声全息技术对运转状态下的罗茨真空泵进行了噪声源识别和定位研究。
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A new method based on interpolation using orthogonal spherical wave source was proposed to enhance the resolution of the nearfield acoustic holography image without adding measurement points.