Multi-Spectrum Ring Light Offers All-In-One Vision System

Keyence’s new and unique 8-wavelength multi-spectrum ring-lighting technology combines with its industry leading high-speed monochrome cameras and advanced hardware & software for vision systems that offer unprecedented flexibility in synchronized lighting, color control, segmented lighting, and high-speed image capture without complicated system integration.

The new CA-DRM multi-spectrum lighting unit supports eight wavelengths, including infra-red and ultra-violet, through dedicated color LEDs. By harnessing the cutting-edge capabilities of multi-spectrum lighting, three operational modes can be selected or combined via easy-to-use software tools to provide an all-in-one image analysis solution that comprehensively covers color recognition, form & shape, surface gloss, and target variability.

This novel technology raises the bar for quality inspection through increased product certainty, higher levels of inspection stability and much improved waste reduction benefiting quality control applications in manufacturing.

The new ‘Multi-Spectrum’ mode utilizes the high-speed monochrome camera and 8-wavelength lighting for visible and invisible light, effectively providing a non-interpolated color to 2568 gradations, compared to the 2563 gradations provided by most conventional RGB color cameras. This exceptional resolution provides vastly superior results to allow ultra-precise fully automated sorting of even the most subtle differences in color. High speed, real time images are synchronized with a single trigger input with no need for complex hardware integration.

As well as a conventional ‘eyedropper’ or color picker method for color separation, much more specific measures can be applied by intuitive selection from multiple images – if required with very narrow wavelengths as well as the ability to register excluded colors from detection.

The second mode available to users of the CV-X and XG-X series multi-spectrum vision systems is the LumiTraxTM vision solution. This well-proven solution, pioneered on previous Keyence ring-lights and digital microscopes, solves the problems associated with conventional vision systems that require time-consuming trial-and-error to ascertain ideal image lighting conditions. By combining multiple images with lighting from up to eight different directions as well as ambient light – and furthermore through all the visible and invisible wavelengths available – images may be processed in a single operation to reveal height changes that generate shape or remove glare and halation. LumiTrax is particularly useful when setting up automated lines to detect surface conditions such as imperfections, embossed or stamped features on patterned, grained or colored materials.  Halation on film-packaged products or light-reflective surfaces can be easily suppressed to read characters or confirm presence of supplementary features. Scratches, scarring, spills and other surface defects are also easily catered for.

The third “Normal Illumination” mode avails the eight built-in color LEDs of the multi-spectrum lighting system to illuminate targets in a variety of colors for optimal lighting conditions and quality inspection. With integrated easy-to-use tools that can capture multiple images and record colors and settings for every program or product type, detection stability is assured simply and effectively without complex external controls even when rapid product or processing changeover is part of the manufacturing process. Normal illumination mode may also be applied by selecting multiple wavelength images and lighting colors to detect surface features that would otherwise be difficult to analyse in a single color.

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