Lenses

Advantages of special lenses for top and side inspection vs multi-camera systems

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Many machine vision applications such as OCR/barcode reading on bottles and containers, or defect detection inside threaded bores require inspecting features randomly located both on the part outer or inner sides, and on the top and bottom surfaces. This paper describes the advantages of using special optics designed for 360° inspection (either using a pericentric design or various lens/mirror combinations) versus multi-camera systems or line-scan imaging.

Tropical Storm Frank off the south western coast of Baja California, captured by Ames Research Centre's HDVis camera mounted on Nasa's Global Hawk unmanned research aircraft. Credit: NASA/NOAA

Removing distortion with optical design

Theia Technology’s Mark Peterson outlined the benefits of rectilinear lenses at AIA’s vision solutions conference. Greg Blackman reports

SWIR imaging can show bruising in fruit that wouldn't be evident with a visible camera. Credit: Sony

Optics design challenge for SWIR

Edmund Optics’s Thomas Armspach-Young and Boris Lange consider the optics needed to get the best out of Sony's new short-wave infrared image sensors

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