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“JAI has solid offerings on both sides of color, meaning single-chip Bayer filter color cameras and color cameras with three CCD sensors or more, including a four-line multispectral color camera that offers separate sensors for red, green, blue, and near infrared,” explains Steve Kinney, Director of Technical Pre-Sales and Support at JAI Inc., USA (San Jose, California).
When customers come to JAI to discuss a color application, Kinney starts by asking what sort of spatial accuracy the system needs versus color accuracy. “It also depends on data rate,” he adds. “If you need absolute color accuracy of less than 1%, then we usually look at a three-CCD prism camera solution. If spatial accuracy over a wide inspection area is more important, then a very-high-resolution single-chip Bayer camera may be better. If you need high speed, CMOS offers higher frame rates and multi-line sensors with NIR capability and is very effective for high-speed printing applications where colorimetry measurements are very important because NIR can help you judge between true black ink and black made by combining cyan-magenta-yellow inks. And for some printing applications, knowing the difference is important for quality purposes.”