The Relay Optics consists of a graphite-epoxy structure containing a folding mirror and a spherical mirror which are used to relay the imaged scene from the prime focal plane to the Band 5, 6 and 7 detectors on the cold focal plane. The characteristics of the Relay Optics are listed in Table 3.5. The position and tilt of the spherical mirror may be varied during integration and test by three electro-mechanical linear actuators to provide focus of the Cold Focal Plane Array and to obtain the correct band to band registration of the cold focal plane detectors to the prime focal plane detectors. The Relay Optics has a magnification of 0.5. This magnification is used because of the reduced physical size of the band 6 detectors.

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Last Updated on May 6, 1999