A system of unequal thickness interference filters with quarter wavelength stack which consists of a spacer surrounded by two multilayer stacks is designed, and the examples of the filter design are given. This kind of filters are not only characterized by high-transparency, but also by high - reflection, therefore, it is superior to the common equal thickness interference system with quarter wavelength . it is easier to control the manufacturing techniques of the new design as compared with that of interference filter of non- quarter wavelength.