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Panoramic microscope with interfering illuminating beams

机译:带有干扰光束的全景显微镜

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Abstract: A new panoramic microscope design is offered. An object is illuminated by two interfering laser beams of different close frequency. The angle between the beams and their direction is varied. An energy of scattered light is detected. The detected signal is filtered at the difference frequency at the fixed beam directions and further the image using two-dimensional Fourier transform algorithm of filtered signal is built. The intensity distribution in the image is shown to have a speckled structure, typical of coherent images, with the envelope dependent on the mean slant of the object's roughness and the curvature of its surface. It is also shown that the larger the size of scattered light detecting aperture, the less the effect of the speckled structure on the image quality. Various designs of the microscope are given. The function of the system that uses a thin Fresnel lens as the light source is described in detail. Two illuminating beams move, one continuously and the other discretely, in perpendicular directions along the lens diameter. The imaging of an object with various periodical structure is simulated. The panoramic microscope designs presented in the paper allows the imaging of objects as large as 10 cm located as long as 10 cm away from the light source and the detector with the Rayleigh resolution of about $lambda@/2. !17
机译:摘要:提供了一种新的全景显微镜设计。一个物体被两个不同频率的干涉激光束照亮。光束之间的角度及其方向是变化的。检测到散射光的能量。将检测到的信号在固定波束方向上以差频进行滤波,并进一步使用滤波后信号的二维傅立叶变换算法构建图像。图像中的强度分布显示为具有斑点的结构,这是相干图像的典型特征,其包络线取决于对象粗糙度的平均倾斜度及其表面曲率。还显示出散射光检测孔的尺寸越大,斑点结构对图像质量的影响越小。给出了显微镜的各种设计。详细介绍了使用菲涅耳透镜作为光源的系统的功能。两束照明光束沿透镜直径在垂直方向上连续移动,另一束离散地移动。模拟了具有各种周期性结构的对象的成像。本文介绍的全景显微镜设计可以对距离光源和探测器长达10 cm的10 cm大的物体进行成像,其Rayleigh分辨率约为λ/ 2。 !17

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