Hologram With Mercury Light

全息图与汞光

One of the unique properties of holograms is that the size of the viewed image scales with the wavelength of the viewing light. Examine a hologram with mercury light to see that scaling. The mercury source has three prominent wavelengths and you can see three distinct images of different size. The use of an interference filter allows you to examine just one of the images at a time. At left are images made through filters at the three mercury wavelengths

全息图的一个独特特性是，所观察到的图像大小与观看光的波长成比例。用汞光观察全息图，可以看到这种比例变化。汞光源有三个显著的波长，你可以看到三个大小不同的图像。使用干涉滤光片可以让你一次只观察到一个图像。在左边是通过三个汞光源波长的滤光片所形成的图像。