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  • Microlux Alumina Powders
May 2010
Meller Optics Inc.Request Info
PROVIDENCE, R.I., May 6, 2010 — A line of high-purity feed material alumina polishing abrasives for aggressive lapping and uniform polishing has been released by Meller Optics Inc.

The calcined optics come in two grades: Microlux-R featuring large agglomerated particles that break down under pressure for aggressive grinding and lapping, and Microlux-RZ which is de-agglomerated with controlled particle sizes for fine grinding and uniform polishing. Supplied in seven particle sizes from 0.05 to 3.0 µm, these powders produce surface finishes to 10-5 scratch dig. The Microlux-R regular grade alumina is used by optical technicians and metallurgists and is suitable for use in filler, filter and metal separation applications.

The Microlux-RZ has a highly controlled particle distribution produced by a proprietary separation process that delivers particles that retain their fine dispersion over years of shelf life, while maintaining its high purity and the unique characteristics of each platelet. Originally created for ceramic applications, it also is used as a fine-grinding and polishing medium in conjunction with large micron grinding media. It is suitable for ultrafine polishing of semisoft crystalline and composite materials, and as a filler for magnetic media, plastics, binders, strengthening composite materials, armor and ultrapure ceramic applications where packing density is critical.

Suitable for grinding, lapping and polishing a wide range of hard and soft optical substrates, Meller Microlux-R is 99.98% pure and Microlux-RZ is 99.99% pure, and both are completely water-soluble and nontoxic. Applications include barium- or calcium fluoride, germanium, silicon, stainless steel, zinc selenide and zinc sulfide. Microlux Alumina is packaged in 5-lb plastic bags placed in protective cardboard containers.


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A protective jacket added to an optical fiber to facilitate use in harsh environments. Armor usually consists of steel or aluminum and is placed between the fiber and its outer jacket.
barium fluoride
A relatively hard crystal, highly resistant to excessive energy radiation, that is frequently used for optical windows, prisms and lenses transmitting from the vacuum UV into the IR.
calcium fluoride
An optical material used in place of crown glass to produce lenses with extraordinary correction of chromatic aberrations. Its high coefficient of thermal expansion and its tendency to absorb moisture limit its range of application.
1. With respect to radiation, a device used to attenuate particular wavelengths or frequencies while passing others with relatively no change. 2. See digital filter.
A crystalline semiconductor material that transmits in the infrared.
1. The process of wearing down the surface of a softer material by rubbing it under pressure against the surface of a harder material that has been formed in the shape opposite to that desired on the softer material. Loose, wet abrasive generally is used between the two parts, but sometimes the abrasive is embedded in the lap in a rigid form (see diamond cutting tool). 2. See fiber lapping.
zinc sulfide
A polycrystalline material that transmits in the infrared; it is used as a phosphor in x-ray and television screens.
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