Lenses Prohibit TV Distortion


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SAN JOSE, Calif. Moritex added TV macro zoom lenses to its macro zoom lens offering to provide a range of lenses that control TV distortion, or the distortion of the edge of the image to the center margin of said image. The company released the product range for use with 1/2 or 1/3" charge-coupled device (CCD) cameras to surface-inspect PCBs, electronic components production, and alignments. CCD cameras use a silicon wafer to create pixilated images in a compact format for various applications.

The MLZ products weigh less than 100 g and feature a 4:1 zoom capability. They can be used in the inspection of solder joints, most surface mount components, and board flatness with correct lighting, says Kevin Sebley, regional manager, Moritex. The company created the surface inspection lenses for integration into small environments, allowing a 173-mm distance for robotic arms or other machinery to operate between the subject and lens. "They are an alternative to the micro lenses, offering more flexibility and zoom," said Sebley. "You could use the macro lens for an overview and get more details by switching cameras to the micro." Motorized members of the product series are available for automated equipment.

The company offers eight magnification levels, from 0.02× 2.4×, in the range, along with a choice of integrated coaxial episcopic illumination. Sebley emphasized the direction of lighting applied to inspection, as this determines the accuracy of shading and other surface anomaly images. A telecentric optical design allows the lens to achieve TV distortion control. Other features include adjustable and lockable focus, iris, and zoom, which is not a feature of the micro lenses.

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