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The Melles Griot Optics Group has developed a family of high-precision Fizeau transmission spheres that cost-effectively quadruple the absolute accuracy of Zygo® style Fizeau surface and transmitted wavefront testing interferometers. The new 100-mm clear aperture transmission spheres are available from stock with f-numbers of f/0.76, f/1.5, f/2.2, and f/3.3.

Melles Griot designs, manufactures and distributes devices that create, control and measure light, as well as products that hold or position photonics devices. The company provides standard and custom solutions to industrial and scientific researchers and original equipment manufacturers. There are manufacturing and distribution activities in 41 countries, and the served industries include biotechnology, metrology, semiconductor equipment, and general research.

Melles Griot is a Barloworld Scientific Company, Rochester, NY. www.mellesgriot.com