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11/17/2010  Sapphire Viewport Windows Withstand Pressures to 10,000 PSI 
 
Custom engineered sapphire windows that can operate from full vacuum to 10,000 psi and from cryogenic to 1,000C while resisting chemicals and particulates are available from Meller Optics, Inc. of Providence, RI.

Meller Sapphire Viewport Windows are manufactured to specification in sizes from 1/4 to 10 dia. and 1/2 mm to 1 thick with stepped edges and ellip-tical edge shaping, holes, slots, and wedges for mounting, and A/R coatings. Featuring Moh 9 hardness, they are suited for applications from full vacuum to 10,000 psi, depending upon configuration, and from cryogenic to 1,000C.

Resistant to chemicals (fluorine to 300C) and most acids, impervious to water, and blowing dirt and sand, Meller Sapphire Viewport Windows are second only to diamond in terms of hardness. Precision fabricated, they exhibit flatness to 0.5 fringes HeNe and parallelism from 20 to 2 arc/secs.

Meller Sapphire Viewport Windows are priced according to configuration, size, and quantity. Price quotations and complete material specifications are available upon request.
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