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Design kit with light reflection eases color recognition

Posted: 02 Feb 2009 ?? ?Print Version ?Bookmark and Share

Keywords:color sensor? color evaluation kit? reflection light?

OPB780 kit

TT electronics Optek Technology has developed a color sensor evaluation kit that can help design engineers simply color evaluation in various applications.

The kit includes the OPB780 Series of full color sensors with four different frequencies relating directly to a specific color seen by the sensor. Housed in a small, lightweight package, the color sensor uses a programmable light-to-frequency converter that combines 64 configurable silicon photodiodes and a current-to-frequency converter on a single monolithic CMOS IC.

The OPB780 Series color sensor can recognize colors over the full 300nm to 1100nm wavelength. Typical applications include pill sorting machinery in pharmaceutical applications, ink and/or paper color detection for office machines, color printer calibration sensors, and color-match sensing in paint, textile and cosmetic manufacturing.

In addition, the color sensor consists of a white LED for illumination of the target; photodiode array consisting of 16 green, clear, red and blue filter diodes; a current to frequency converter: TTL and CMOS drive circuitry; and plastic packaging with 10-pin (25.4cm) FFC. All 16 photodiodes that have the same color filter are connected in parallel, while all 64 photodiodes are 120?m x 120?m in size and are on 144?m centers.

The OPB780 color sensor evaluation kit includes:

? OPB780 sensor mounted on a test fixture;
? Interface PC board programmed to provide appropriate computer and interface outputs;
? USB A/B interface cable;
? USB flash drive with installation software, data sheet and instructions.

"The OPB780 kit easily interfaces with computers to provide a frequency output for each sensor diode configuration," said Alan Bennett, VP of sales for Optek. "Utilizing a light reflection technique, the design kit provides engineers with a simplified means of identifying colors far beyond the human visual spectrum."

The OPB780 Kit's photodiode is designed to recognize ultraviolet, visible and IR wavelengths.





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