Absolute Metrology Services

A Woman-Owned Business


Absolute Metrology Services has over 20 years of experience in high-level interferometry and optical test. Our first priority is to provide you with accurate test results. Our second priority is to give you quick part turnaround. We provide a formal test report for your measurements and offer a ‘walk through’ of the report over the phone for greater ease and efficiency. AMS does not sell metrology equipment or optics; our focus is to provide the most accurate optical metrology. We take pride in our top-notch customer service.

Metrology Equipment

The most common measurement requests (and equipment used) include:

  • Flat and spherical form and certifications (Verifire™MST)
  • Radius of curvature of spheres (VeriFire™ATZ)
  • Roughness, waviness, and texture (NewView™7300)

See our Optical Testing Services page for a more complete listing.

3D model of a roughness measurement on polished glass, performed on a NewView™7300 interferometer.


Optical Testing Services
Contact AMS

Third Party Evaluation

Perhaps you want to evaluate a new supplier for part quality, or your current supplier is providing parts that you feel might be out of spec. AMS is an optical test service to help you confirm the quality of received parts. Contact AMS, ship us the parts and we will perform the QC for you. If desired, we can train your supplier on proper test procedure as well as check the quality of the references used at their facility.

Process Development

Do you manufacture parts and have a metrology or quality challenge? We can evaluate measurement feasibility, engineer a test setup, write code to calculate complex results or maps, and measure your samples during development. When you are comfortable with your process, If AMS has developed a test setup for you to use in-house, we will write up a test procedure and train your employees. AMS has engineered hundreds of custom optical test setups and code for unusual parts or specifications. Send us a drawing and let us handle the initial metrology or assist with your process development.

Contact AMS

Take the time to browse our offerings on this site. When you are ready to discuss your requirements, Contact AMS. We look forward to serving your needs in interferometry and optical test.

Customer Testimonials

See the complete testimonials from these customers on our Company Profile page.

"Maria took care to 'pull out all the stops' concerning reference alignment, environment and vibration control, and repeatability before reporting or using a measurement... For any project which required testing of parts better than 1/30th wave, I would always ask for Maria first."-see more

-Mark Mulhern, on AMS' work done for Special Engineering Projects at Zygo Corporation

"Maria...provided us with an invaluable, timely and quite thorough on site technical training experience to our employees...Our employees found her extremely helpful and a true delight to partner (with), and I would strongly recommend her and Absolute Metrology Services to anyone who is serious about advancing their metrology capabilities, for unsurpassed quality, value, and results!" -see more

-Dwighd D. Delgado, on AMS' 8-week training program provided for Janos Technology


AMS is a subsidiary of Greywall Incorporated
East Hampton, CT 06424
ph: 860-883-9953
alt: 860-267-6177
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