Patent ID: 6918673
Filing Date: 2005-07-19
Classification: G02B

Abstract:
1. A filter assembly to filter electromagnetic radiation, comprising: a first transparent substrate including a first surface to transmit at least a portion of the electromagnetic radiation, the first surface having a thin film filter disposed thereon; a second transparent substrate including a second surface to transmit at least a portion of the electromagnetic radiation; a first resilient element located between the first surface and the second surface; a compression system coupled to the first transparent substrate and the second transparent substrate to provide a compressive force therebetween, the compression system and the first resilient element aligning the first surface and the second surface to face one another; a second resilient element located between the compression system and the first transparent substrate such that the second resilient element is compressed by the compressive force; and a third resilient element located between the second transparent substrate and the compression system such that the third resilient material is compressed by the compressive force.