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Wavelength shifting Fizeau interferometer for multi surface cavities

Verifire MST from Zygo

Verifire MST - wavelength shifting laser for simultaneous measurement of the front and back surface of transparent optics, thickness variation, wedge and 2-step homogeneity.The Verifire MST can measure two-, three- and even four-surface cavities. Show all of the surfaces, or only the surfaces of interest, within the MetroPro software. Artifacts are naturally suppressed using FTPSI, eliminating the need for an extended source.

Features

Two-, three- and even four-surface cavities
Standard 4" or 6" aperture
Complete accessory
Zygo transmission spheres and flats

Further information

Measuring an uncoated parallel plate gives two layered interferograms (a three-surface cavity) that only confuse standard Phase Shift Interferometry algorithms.

Zygo has solved this problem using wavelength shifting of phase, and Zygo's patented Fourier transform phase shifting interferometry (FTPSI). The Verifire MST can measure two-, three- and even four-surface cavities. Show all of the surfaces, or only the surfaces of interest. Artifacts are naturally suppressed using FTPSI.

Specifications

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Verifire_MST_specs.pdf

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Verifire MST specs

Applications

Fourier transform phase shifting interferometry (FTPSI) The Verifire MST can measure two-, three- and even four-surface cavities. Show all of the surfaces, or only the surfaces of interest, within MetroPro software. Artifacts are naturally suppressed using FTPSI, eliminating the need for an extended source.

Phase shifting Fizeau interferometer Measures surface form of reflective materials and optics, and transmitted wavefront of transparent optics

Form of optical spheres ISO 10110-5 Transmission spheres 4" or 6" input aperture

Fizeau interferometer for optical flats measurements