VeriFire™ MST

The VeriFire™ MST provides results and measurement capabilities never before available. The VeriFire™ MST starts with the classical interferometer applications. These applications all measure the wavefront variations between two surfaces, a two-surface cavity. However, 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-surface, three- and even four-surface cavities. Show all of the surfaces, or only the surfaces of interest, all within MetroPro® software. Artifacts are naturally suppressed using FTPSI, eliminating the need for an extended source.

Three-Surface Interferometry

Plane parallel plates can now be measured for the flatness of the front and back surface¹ plus the optical thickness of the plate. In one data acquisition you can measure the front surface map, optical thickness variation, and the back surface approximation using optical thickness information.

Four Surface Interferometry

The MST four surface application enables the measurement of all of the following with only two data acquisitions (and no hazardous part coatings):

Front and Back surface maps
Physical Thickness Variation (including Wedge)
Optical Thickness Variation
Refractive Index Variation:
• Nonlinear Homogeneity
• Linear Homogeneity (first time!)

The four surface measurement technique greatly simplifies homogeneity metrology while providing valuable material information not available in traditional PHOM tests.

Notes:
1 Back surface assumes a constant index approximation. Four Surface Interferometry eliminates the need for this assumption.

VeriFire™, MetroPro® software, and ZYGO's large range of setup possibilities and accessories provide enhanced flexibility and ease of use over previous generation interferometers.

Brochure and Specification Sheets

To download a brochure and specification sheets for the VeriFire™ line of interferometers (in PDF format), click on the appropriate links below.

PDF	VeriFire™ Family Brochure   NEW !
PDF	VeriFire™ 1550 nm Interferometer Specification Sheet (110 k)
PDF	VeriFire™ 633 nm Interferometer Specification Sheet (218 k)   NEW !
PDF	GPI™ & VeriFire™ Accessories (724 k)
PDF	Transmission Sphere Selection Guide (304 k)
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