Color Sensor

Definition

A color 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.

A color sensor can detect the received light intensity for red, blue and green respectively, making it possible to determine the color of the target object.

Types of Color Sensors

Two types.

One illuminates the object with broad wavelength light and differentiates the three types of colors in the receiver.

The other type illuminates the object with the three types of light (red, blue, and green) independently.

In both scenarios, the received light intensity of red, blue and green are detected, and the ratio of light received is calculated.

1. Light to Photo-Current Conversion: Converts light into an electrical current, with different colors generating varying current levels. Used for analog responses to light intensity.
2. Light to Analog Voltage Converter: Converts light into an analog voltage signal, providing a continuous analog output proportional to light intensity and color.
3. Light to Digital Conversion: Converts light into digital data, often using an array of sensors for color detection, providing digital values for color analysis and processing.