大学物理 ›› 2010, Vol. 29 ›› Issue (4): 41-41.

• 著者文摘 • 上一篇    下一篇

用空间滤波方法制作θ调制全息物片

仲明礼   

  1. 潍坊学院物理与电子科学学院,山东潍坊261061
  • 出版日期:2010-04-25 发布日期:2010-04-20

Study of fabrication of holographic θ modulation board based on spatial filtering method

  • Online:2010-04-25 Published:2010-04-20

摘要: 给出了一种制作θ调制全息物片的新方法.在空间滤波光学系统的频谱面上放置只允许±1级频谱通过的滤波器,当单色平行光垂直照射物平面上的一维光栅时,将在像平面上得到两个重叠的一维光栅像,同时在成像区域形成光强按余弦规律变化的干涉条纹.用装有镂空模板和全息干版的可旋转组合干版夹对干涉条纹进行3次等时曝光,记录下3种不同干涉条纹方向的图案,即可制作出θ调制全息物片.

关键词: 全息光栅, θ调制, 空间滤波, 傅里叶变换

Abstract: A new method of fabricating holographic θ modulation board is proposed. The filter is available to allow only ±1 frequency spectrum to pass in the spatial filtering optical system, thus two overlapping one-dimensional grating images and the sinusoidal interference fringes on the output plane are obtained when a parallel monochromatic beam of laser light focuses on the input plane. Three-equal-time exposal is necessary to record the figures of interference fringes with three different directions by using a rotatable bracket with hollow template and holographic plate, thus the θ modulation board is done.

Key words: holographic grating, θ modulation, spatial filtering, Fourier transform

中图分类号: 

  • O436.1