INSPECTION & MEASUREMENT FEATURE TUNABLE POLYMER LENSES FOR MACHINE VISION VIDEO MICROSCOPE
STEMMER IMAGING has signed an agreement with Optotune for the distribution of its range of polymer lenses for industrial vision applications. Now available from all STEMMER IMAGING companies through Europe, these innovative lenses consist of an elastic material whose shape can be adjusted in order to focus. Tunable focus is achieved by changing the shape of these flexible lenses which feature a container filled with an optical liquid and sealed with a thin, elastic polymer membrane.
A circular ring pushes onto the centre of the membrane and the shape of the lens and hence its focus can be changed by moving the ring or exerting a pressure on the outer part of the membrane or by pumping liquid into or out of the container. A change in lens radius of several microns can have the same optical effect as moving the entire lens several centimetres. The liquid lenses do not replace conventional optics in a machine vision system. However, when being used with the appropriate optics they allow a much faster change of focus than traditional solid glass or plastic-based optics which need to be moved backward and forward to focus or zoom. This means users
benefit from smaller, cheaper and faster optical systems. “This is a very interesting technology
which has many potential applications for machine vision,” says director Mark Williamson. They are particular useful where objects of different height need to be measured since the use of tunable lenses removes the need for mechanical actuators. This reduces both complexity in set-up and the amount of space needed for the optics. In addition, lens response times of the order of just milliseconds can accommodate high throughput inspections.”
STEMMER IMAGING T: 01252 780000
www.stemmer-imaging.co.uk Enter 315
When being used with the appropriate optics they allow a much faster change of the focus than traditional solid glass or plastic-based optics
UK optical instruments distributor PeplerOptics has launched a range of video inspection and measuring systems. Kitozoom - a video microscope designed for inspection and measurement tasks – is available in four specifications. The microscope will feature high-resolution images with large depth of focus and field of view and its flexibility of configuration means it can be used across a wide variety of applications. Models which are all competitively priced come with an optical zoom unit providing magnification from 8x to 450x and additional accessories include X-Y cross tables and cold light sources. A compatible measuring software KITEC is available with the Kitozoom series, providing quick image capture, analysis and the most comprehensive set of measurement functions, working in either a live or still image. PeplerOptics has been supplying the national market since 2011, providing advanced video inspection units and a selection of microscopes, loupes and magnifiers including brands such as Peak and Cellcheck’s Portable Video Microscopes.
PeplerOptics T: 01625 541336
www.pepleroptics.com Enter 316
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