Noncontact laser inspection system

Dantec Dynamics Inc.’s Q-800 Laser Shearography System, a compact and portable measuring solution, reportedly can detect defects in composite structures, including delaminations, disbonds, kissing bonds, wrinkling/waving, impact damage and more, with no surface preparation.

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Dantec Dynamics Inc.’s (Ramsey, N.J.) Q-800 Laser Shearography System, a compact and portable measuring solution, reportedly can detect defects in composite structures, including delaminations, disbonds, kissing bonds, wrinkling/waving, impact damage and more, with no surface preparation. The turnkey noncontact/full-field optical system is designed to inspect fiber-reinforced plastics, laminates, honeycomb, foam, wood, metal and glass-reinforced fiber metal laminate (e.g., GLARE). The interferometric technique measures microscopic surface deformations caused by internal flaws as a small load is applied to the object via thermal, pressure, vibration or mechanical excitation. The system consists of a miniaturized shearography sensor with an integrated high-resolution CCD camera and variable computer-controlled shear optics. Illumination is provided by an integrated diode laser array, and the whole system is controlled from a laptop PC, using the new ISTRA 4D software platform. The sensor mounts on a tripod or can be integrated into an automated robotic inspection system. Results are displayed in real time. Images can be processed for export and reporting. Typical inspection times are 10 to 30 seconds. Coverage can range from a few square millimeters up to several square meters in one pass.