differentiation filter is realized by making f. t. holographic filter from diffracting grating type differentiation mask.
微分滤波器是利用光栅结构的微分函数制作其傅里叶变换全息滤波器来实现的。
the principle and method of holographic record of the particle field by 4f fourier lens system and holographic filter are introduced in this paper.
本文介绍用4f傅里叶透镜系统和全息滤波器对粒子场分布作全息记录的原理和方法。
the reflection holographic filter has ideal filtering property, and can be well used as a kind of elements for eye protection against laser.
反射式全息滤光片具有很好的滤光特性,可作为一种激光防护元件。
in this paper, a method using slanted fringes is introduced, with which the background noise of a reflection holographic filter can be depressed greatly.
本文介绍了用倾斜条纹抑制全息滤光片背景噪声的方法,可以收到较好的效果。
compared to the conventional interference filter, the main disadvantage of holographic filter is its higher background noise.