What sensor can detect color?
A colour sensor is a type of “photoelectric sensor” which emits light from a transmitter, and then detects the light reflected back from the detection object with a receiver.
What type of industry could the color sensor be used in?
Several industries such as food and beverages, commercial and consumer printing, consumer electronics, automotive, pharmaceutical and healthcare, chemicals, textiles are employing these sensors for the identification of minute variations of color.
What are the different types of color sensors?
At present, there are two basic types sensor based on the principle of all kinds of color identification:
- RGB color sensor (red, green, blue) mainly detects tristimulus values;
- Chromatic aberration sensor detects the chromatic aberration of the object to be tested and the standard color.
How many colors can a color sensor detect?
Depending on the sophistication of the sensor, it can be programmed to recognize only one color, or multiple color types or shades for sorting operations.
Why are color sensors used?
Color sensors are generally used for two specific applications: true color recognition and color mark detection. Sensors used for true color recognition are required to “see” different colors or to distinguish between shades of a specific color. They can be used in either a sorting or matching mode.
How far can a color sensor work?
The sensor itself is about 1mm x 1mm, so it could theoretically read objects that small, but in practice this wasn’t reliable nor particularly practical. How far away can it see? About 1 cm from the hole we made in the case, so that would be about 2cm from the actual sensor.
How does a color sensor works?
Color sensors register items by contrast, true color, or translucent index. True color sensors are based on one of the color models, most commonly the RGB model (red, green, blue). A large percentage of the visible spectrum can be created using these three primary colors.
What are the wavelength ranges of color sensors?
These devices can be configured to locate wavelengths from near infrared (colors in the 750 nm to 2500 nm wavelength range), far infrared (colors in the 6.00 to 15.00 micron wavelength range), and UV (colors in the 50 to 350 and 400 nm wavelength range), in addition to the visible range.
How does a color sensor work in matching mode?
In matching mode, output is activated when the object to be detected is identical (within tolerance) to the color stored in memory. Color mark detection sensors do not detect the color of the mark, rather, they “see” differences or changes in the mark in contrast with other marks or backgrounds.