全息透镜傅里叶变换特性分析

详细信息

The characteristic analysis of hololens Fourier transform

Department of Physics, Second Artillery Engineering College, Xi'an 710025, China

摘要: 利用一点光源和一束倾斜平行光拍摄了一种离轴全息透镜,并对其傅里叶变换特性进行了分析。将输入图像置于这种全息透镜的前面或后面,均能得到物体的傅里叶变换功率谱。图像尺寸越小,全息透镜的焦距越长,产生的误差越小。当物体位于偏离主轴的前焦面时,能够得到物体准确的傅里叶变换。
- 全息透镜 /
- 傅里叶变换 /
- 菲涅耳衍射 /
- 功率谱
Abstract: The Fourier transform characteristics of off-axis hololens was discussed,which was made by using a dot light source and an inclined parallel light.The Fourier transform power spectrum of input object can be obtained when the input image is placed at the front or back of the hololens.The more small the size of input image is and long the focal length is,the more small the error is.The exact Fourier transform of the object can be obtained when it is placed at the front focal plane of the hololens.At the end of this paper,the optical experimental results are given.
- hololens /
- Fourier transform /
- Fresnel diffraction /
- power spectrum

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