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The World Leader in Non-Destructive Optical Stress Inspection & Measurement

Strainoptics is the world’s foremost manufacturer of polarimeters and polariscopes, non-destructive stress measurement instruments for the glass and plastics industries.

Our product line encompasses a complete range of instruments, from simple strain viewers and roller wave gauges to specialized, software-based, on-line measurement systems.

The New GASP® PRO Surface Polarimeter

Measure your glass automatically in real time.

Export your measurement data easily and wirelessly.

Use any mobile device. Anytime. Anywhere.

Upgrade your existing GASP by yourself.


Not sure what you need? Click here for Recommended Instruments by Industry

Strainoptics serves the entire glass supply chain – from float glass manufacturers to tempering plants to architects to testing labs. Strainoptics also serves manufacturers of transparent plastics to improve yields. Click here to see all of the industries that benefit from our inspection instruments and services.

polarimeters for glass and plastics


Know what you need? Click here for Complete Instrument List

Strainoptics manufactures a variety of polarimeters, polariscopes (strain viewers), roller wave gauges, and other stress measurement instruments.

polarimeters and polariscopes

New! PS-100-E671

A new orientation of our PS-100 Polarimeter System for measurement in accordance with ASTM E671

Strainoptics now has available a new PS-100-E671 Polarimeter System oriented specifically for customers wishing to measure glass laboratory equipment in accordance with ASTM E671. Click the above link to learn more.

polarimeters for glass and plastics

Updated Roller Wave Gauge Calculation Tool

Check out our new RWG Sales Bulletin showing the new calculation interface

Strainoptics has always provided a handy, macro-enabled Excel spreadsheet with all of our Roller Wave Gauges (RWG), but now we have updated it to be easier to use and more informative to the user. This tool helps facilitate the measurements needed for compliance with ASTM C1651.

polarimeters and polariscopes


SEND US YOUR SAMPLES! If you are unsure which instrument is right for you or if Strainoptics can help you at all, send us samples! We will examine them and provide a feasibility report with our recommendations at no charge. E-mail us at or give us a call at (215) 661-0100 to learn more.


If you have any questions, or would like more information, simply E-mail us at or give us a call at (215) 661-0100. We are happy to provide quotes for any custom testing or products.