What’s the difference between a true color sensor and a color registration mark sensor?
True color sensors can be taught to detect minute color differences (for example, it can tell dark blue from black), while color mark sensors detect a gray scale change in color. True color sensors reflect light off a target using a white LED and red, green and blue filter elements. A color value is then assigned to the light returning to the sensor based on the amount of light reflecting off the target. Click here to see Banner’s QC50 true color sensor. With color mark sensors, the sensor uses just an LED and no filters. The sensor distinguishes between the target color based on how it contrasts with the background color.
