Compared to the conventional interference filter, the main disadvantage of holographicfilter is its higher background noise.
与传统的干涉滤光片相比，背景噪声高是全息滤光片的主要缺点。
2
The reflection holographicfilter 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。
3
In this paper, a method using slanted fringes is introduced, with which the background noise of a reflection holographicfilter can be depressed greatly.