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Zygo offer a complete range of high quality transmission spheres (TS) designed to provide optimum interferometer performance. Zygo’s optics are specified and fully qualified to ensure accurate metrology for applications ranging from testing conventionally polished ultra smooth surfaces, to providing critical metrology feedback for small tool polishing processes. Each Transmission Sphere comes in a protective storage case with quality certification.
OVERVIEW - Measurement Capability
Zygo Transmission Spheres are used in conjunction with a laser Fizeau interferometer for the measurement of the surface form or transmitted wavefront of spherical optics and assemblies. They can also be utilised in the measurement of conic and aspheric shapes using the unique capabilities of the Zygo VeriFire Asphere interferometer.
The range of Transmission Spheres is available with Entrance Beam Diameters (Interferometer Aperture Size) of 25 mm, 4 inch, 6 inch. They are designed for use at a wavelength of 633 nm and have low expansion reference elements.
The field coverage and residual axial ghosts are suitable for use with Zygo Ring-of-Fire illumination as used in the high-end Verifire ATZ interferometer based systems. Controlled mid-spatial frequency content (PSD) make them suitable for use in closed-loop feedback processes in work cells utilising small pad polishing technologies.
Zygo currently offers four types of transmission spheres...