Stress Photonics uses innovative photoelastic methods to offer a full line of automated, easy-to-use, full-field glass inspection instruments.

Stress Photonics was founded in 1988 as a spinoff of the University of Wisconsin by Professor Bela Sandor and Stress Photonics president Jon Lesniak. Having been an industry mentor to the group, Brad Boyce became a partner shortly thereafter. With Lesniak’s special skills in math and science and Boyce’s electronics and software expertise, Stress Photonics quickly rose to become a world-class leader in engineering measurements of stress and strain.

Through a NASA SBIR grant, Stress Photonics integrated innovative concepts, military grade IR technology, and high-speed image processing to introduce a revolutionary full-field Thermoelastic Stress Analysis instrument, the DeltaTherm™ 1000. In 1994, DeltaTherm was selected to receive the coveted R&D 100 Award.

Stress Photonics then developed the GFP™1000 (Grey-Field Polariscope), the first fully automated commercial Photoelastic Stress Analysis system. The GFP1000 quickly found a home in automotive glass assessment. The GFP systems measure residual stress in glass or applied stress in engineering materials and structures.

The need for speed led to the real-time GFP™2000, and to the industry standard EdgeMaster™ Windshield Stress Measurement System, which performs quick and efficient edge stress measurements.

There is virtually no limit to the size of glass that can be inspected with a GFP system. From microscopic measurements of anodic-bonded Si/glass, to measurements of mammoth sheets of architectural glass and full automotive windshields, our inspection tools and our team of experts are ready to handle the most challenging applications. With stress measurement tools from Stress Photonics, the answer is clear.™