Interfire II Reflective Beam Expander

The reflective beam expander accessory is designed for the analysis of large optics using the INTERFIRE range of infrared interferometers. It is used in the 3-5 micron and 8-12 micron wavebands. The unit is produced in collaboration with Optical Surfaces Ltd and features a Newtonian configuration to provide an intermediate focused image for efficient relaying of optical pupils. This is essential at longer infrared wavelengths. This Interfire II accessory is a stand alone unit. It can be fixed to an optical bench with height adjustment for better alignment.