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Process Corrects for Diffractive Form Errors

Photonics Spectra
Dec 2011
Precitech Inc. of Keene, N.H., and Taylor Hobson of Leicester, UK, have developed a technique to measure, analyze and correct for diffractive form errors in three dimensions. The process uses Taylor Hobson’s PGI 3-D with advanced aspherics analysis software, along with its CCI optical profiler, and Precitech’s NanoForm 250Ultra with a rotary B axis and a fast tool servo. Precitech provides ultraprecision single-point and multiaxis diamond-turning machines for rotationally symmetric and free-form applications in nonferrous, ferrous and high-performance metals.

Not spherical; an optical element having one or more surfaces that are not spherical. The spherical surface of a lens may be slightly altered so as to reduce spherical aberration. Aspheric surfaces are frequently, but not necessarily, surfaces of revolution about the lens axis.
advanced aspherics analysis softwareAmerican Society of Precision EngineeringAmericasasphericasymmetric errorsBusinessCCI optical profilerdiffractive form errorsfast tool servolight speedNanoForm 250ultraNew HampshireOptical SurfacesopticsPGI 3-DPrecitechrotary B axissymmetric errorsTaylor Hobson

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