Shao J, Dobrowolski J A
Appl Opt. 1993 May 1;32(13):2361-70. doi: 10.1364/AO.32.002361.
The theoretical and experimental aspects of an alternative approach to the construction of interference filters for wavelengths greater than 80 microm are described. The filters consist of a number of thin plastic sheets with films of a high refractive index deposited onto one or both sides of each sheet. These are then heat bonded to form a self-supporting optical multilayer filter. Experimental results are presented for a number of filters produced in this way. Reflectances of the order of 90% have been measured for wavelengths as high as ~200 microm. By successive reflections from two or more such multilayers it is possible to produce efficient, narrow-bandpass filters with blocking over extended spectral regions. The possibility of the construction of other devices, including even narrower bandpass filters and wideband beam splitters, is also discussed.
本文描述了一种用于构建波长大于80微米的干涉滤光片的替代方法的理论和实验方面。这些滤光片由许多薄塑料片组成，在每片塑料片的一侧或两侧沉积有高折射率薄膜。然后将它们热粘合在一起，形成一个自支撑的光学多层滤光片。文中给出了用这种方法生产的一些滤光片的实验结果。对于高达约200微米的波长，已测得反射率约为90%。通过两个或更多这样的多层结构的连续反射，可以生产出在扩展光谱区域具有截止特性的高效窄带通滤光片。文中还讨论了构建其他器件的可能性，包括更窄带通滤光片和宽带分束器。
