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Asphere Metrology -

Optimax Systems 5 August 08 White Papers Figure Five: Null Testing of Parabolic Lenses Spherical Wavefront Interferometry with Zernike Subtraction An asphere can be tested in the same way as a sphere if the departure from spherical is mild enough that the fringes formed by

Computer Generated Hologram Metrology | Edmund Optics

Computer Generated Hologram metrology is a promising solution to several of the drawbacks associated with traditional metrology techniques for aspheric lenses. Aspheres are vital to a variety of applications because they allow for a reduction in spherical aberrations and can achieve a low f/#.

Measuring Steep Sphere and Asphere Surfaces - Apre Instruments

Asphere Metrology. Aspheres are difficult to measure with Fizeau interferometers. A Fizeau operates best when the surface is a nulled sphere to minimize ray-trace errors, and aspheres can greatly deviate from a sphere. Further the high slopes of aspheres can exceed the slope limit of the imaging system causing the measurement to fail.

Asphere Metrology: Options for Measuring Aspheric Lenses

Asphere Metrology: Options for Measuring Aspheric Lenses. Tuesday, January 19, 2010 Optimax Systems Inc. This paper will outline the numerous metrology options for aspheres at Optimax, including how they work, any requirements, and what is specified with each method in an effort to help reasonably tolerance aspheres. Effects on the fabrication

ASI(Q) - QED Technologies

QED’s ASI(Q), is the latest innovation in precision optics metrology, brought to you by QED Technologies. The ASI(Q), completely designed, engineered and built by QED, is powered by QIS, the QED interferometer for stitching. Optimized for stitching, QIS enables you to measure more parts, measure them better, and say yes to more complex projects.


Optical Asphere Metrology. Metrology is a vital component of the asphere fabrication process and it must not be overlooked when determining fabricator capability. The ability to characterize aspheric form helps determine potential lens performance and enables subsequent deterministic correction. Asphere metrology has distinct challenges, but

PHOTONICS APPLIED: METROLOGY: Stitching interferometers

PHOTONICS APPLIED: METROLOGY: Stitching interferometers: Direct imaging aids asphere metrology. The QIS, a coherent imaging Fizeau interferometer, has been developed to measure high fringe densities for non-null, aspheric stitching interferometry.

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Hexapod for Non-Contact Asphere Metrology

Hexapod for Non-Contact Asphere Metrology An asphere or aspheric lens is an optic whose surfaces are defined by a polynomial equation. Aspheres are rotationally symmetrical around the optical axis, but their radius of curvature changes with the distance from the center. Aspheric lenses provide higher performance compared to conventional lenses

Tech Paper: Comparison of Asphere Metrology Devices

Technical Paper: Comparison of Contact and Non-Contact Asphere Surface Metrology Devices. Learn about different solutions to qualify an asphere during fabrication.

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