Zygo: Laser Interferometer
Laser interferometers from ZYGO were first introduced commercially over 35 years ago. Today, ZYGO continues to maintain the leadership role in surface form metrology using laser interferometry. Thousands of ZYGO interferometers are installed worldwide and relied upon daily to provide accurate production measurements of optical components and assemblies, things that affect our daily lives. Applications span across a wide range of industries, including consumer electronics, ophthalmology, semiconductor and defense & aerospace. ZYGO is the one optical metrology company that is trusted across the globe to qualify the world's most critical and precise optics. Shouldn't you be using a ZYGO laser interferometer?
DynaFiz™ Dynamic Interferometers - highly optimized dynamic Fizeau laser interferometer for performing the most precise measurement of optics in the presence of air turbulence and extreme vibrations.
Verifire™ Fizeau Interferometer Series - the ideal interferometry choice for accurate metrology of surface form. Verifire laser interferometers are used worldwide in quality control, R&D, and production test applications. The Verifire family of interferometers are quantitative phase shifting interferometers for use in the measurement of flat, spherical and aspheric optics.
Large Aperture Interferometer Systems - Large Aperture Fizeau Interferometers are available for static and phase measuring applications with 12", 18", 24" and 32" apertures (300 mm to 800 mm). ZYGO's large aperture beam expanders are an optional extension to the Verifire™ and GPI™ interferometers. Taking advantage of ZYGO's powerful lasers, the beam expanders are configured to provide both a standard 4" measurement beam and a large aperture metrology source.
GPI™ LC Laser Interferometer - The GPI™ LC interferometer allows you to perform visual fringe analysis of flat or spherical surfaces, and transmitted wavefront measurement of optical components and assemblies.
UV and IR Interferometers - Interferometers using invisible light at both longer and shorter wavelengths. ZYGO is expert at interferometry at a range of wavelengths, from 266 nm to 10.6 µm infrared.
'Special' interferometers - For metrology needs outside the mainstream production offerings of ZYGO - and ZYGO's catalog of standard interferometers is larger than any - we have a special group of experts dedicated to producing precision systems for limited production. Unusual configurations, wavelengths and apertures are all part of our capabilities.
Interferometry Accessories - ZYGO qualifies all of our optical metrology accessories to ensure optimal interferometer performance. Our accessories include transmission and reference optics, opto-mechanical mounts and fixtures, radius of curvature hardware and vertical mounting options.
Upgrade Your ZYGO Interferometer - ZYGO interferometers are built to last. Through our decades of support, as technology has advanced, ZYGO continues to offer upgrades to existing systems to improve and expand their capabilities.
Vibration-Tolerant Interferometry
QPSI Technology Shrugs Off Vibration from Common Sources
• Eliminates ripple and fringe print-through due to vibration
• High-precision measurement; same as phase-shifting interferometry (PSI)
• Requires no calibration, and no changes to your setup
• Easily enabled/disabled with a mouse click
When image stabilization became available on digital cameras, it vastly reduced the number of photos ruined by camera shake. The new technology eliminated the effects of common hand tremors, greatly improving image quality in many photo situations.
In precision interferometric metrology, a similar problem,environmental vibration, has ruined countless measurements, like the one in the animation shown at right. Vibration can significantly affect measurement results and spatial frequency analysis, and it is difficult to make high quality optics if you cannot measure them reliably. Solving the vibration problem can be costly, requiring the purchase of a vibration isolation system or a special dynamic interferometer.
Zygo's QPSI™ technology is truly a breakthrough for many optical facilities because it eliminates problems due to common sources of vibration, providing reliable data the first time you measure. QPSI measurements require no special setup or calibration, and cycle times are typically within a second or two of standard PSI measurements.
QPSI is available exclusively from Zygo® on Verifire™ QPZ and DynaFiz™ interferometer systems. These systems are easy-to-use, on-axis, common-path Fizeau interferometers – the industry standard for reliable metrology – making them the logical choice for most surface form measurements.
QPSI Simplifies Production Metrology
A Zygo interferometer with QPSI technology is capable of producing reliable high-precision measurements in the presence of environmental vibration from common sources such as motors, pumps, blowers, and personnel. Unless your facility is free of these sources, your business will likely benefit from QPSI technology.
And while QPSI can completely solve many common vibration issues, environments that have extreme vibration and/or air turbulence may require the additional capability of DynaPhase™ dynamic acquisition, which is included with Zygo's DynaFiz™ interferometer. Zygo can help determine the best solution for your particular situation.