Production of metal matrix composite mirrors for tank fire control systems

Alan L. Geiger; Eric Ulph Sr.

doi:10.1117/12.137998

16 September 1992 Production of metal matrix composite mirrors for tank fire control systems

Alan L. Geiger, Eric Ulph Sr.

Proceedings Volume 1690, Design of Optical Instruments; (1992) https://doi.org/10.1117/12.137998
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

The first production lot of 50 units of metal matrix composite mirrors for the Leopard I tank fire control system was recently completed by Optical Corporation of America (OCA), Garden Grove, California. The mirror substrates were finish machined from forgings of Optical Grade SXA^TM metal matrix composite manufactured by Advanced Composite Materials Corporation (ACMC), Greer, South Carolina. Use of forgings rather than hot pressed billet yields more efficient use of material and reduces machining time, resulting in lower cost. The mirrors were fabricated by a process sequence of machining, thermal stabilization, electroless nickel plating, polishing, and coating with a high efficiency, laser damage-resistant optical coating. The mirrors are used in the fire control system for a day channel (direct view) and near infrared (CCD), a muzzle reference system laser transceiver, a laser range finder, and an infrared thermal imaging system. SXA composite was chosen over competitive mirror materials (glass and beryllium) because of its high specific strength and stiffness, good stability, and moderate machining cost. The mirrors exhibit excellent stability and optical performance. Field trials of prototype mirrors in fire control systems have proven successful.

Citation Download Citation

Alan L. Geiger and Eric Ulph Sr. "Production of metal matrix composite mirrors for tank fire control systems", Proc. SPIE 1690, Design of Optical Instruments, (16 September 1992); https://doi.org/10.1117/12.137998

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