基于自聚焦透镜的光纤数字全息系统实验研究

在光纤数字全息光路中引入自聚焦透镜，利用其特有的成像特性，作为物光波的中继传输器件，构成一套紧凑型光纤数字无透镜傅里叶变换全息记录系统，以实现对微小物体的全息记录与数值再现.研究结果表明，结合自聚焦透镜和光纤数字全息术的特点，不仅可使光学测试系统紧〖CM(42〗〖JP2〗凑、微型化，而且还可以对一些特殊环境、光线难以直接到达的隐藏区域或封闭系统内部进行测量.

Experimental Investigation of Digital Fiber Holography with Self-focusing Lens

Applying self-focusing lens as a key device for optical sensor in fiber digital holographic system, one fiber carried the beam for illuminating the object and the others conveyed the reference beam to the CCD. The reflective wave scattered from the object surface was collected with a self-focusing lens to interfere with the reference beam on the CCD target. The lensless Fourier transform holograms thus formed were digitally recorded and the experimental results show that the reconstructed images and the interferogram can be evaluated for object deformation. It is shown that with the use of a self-focusing lens by its special imaginary property, the fiber system presented here can be used for measuring small areas of an object or objects difficult to access, while the whole setup is compact and more flexible.