What color does the fiber optic sensor display

Fiber optic sensors can display red, blue, pink, or infrared light depending on the model and application.

Fiber optic sensors use light to detect objects, and the color of the light emitted depends on the sensor's design and purpose. Common visible colors include red (around 633 nm), which provides high stability even with bright or white objects, and blue (around 455 nm), which is suitable for precise detection on glossy, dark, or glowing surfaces. Some sensors combine red and blue LEDs to produce pink light, enhancing output and detection range. Additionally, infrared light (over 750 nm) is used for applications where the light should be invisible to the human eye, such as on moving robot grippers or autonomous vehicles, and it allows for longer detection distances . The emitted light is reflected off the target and received by the sensor's amplifier, which determines whether the object is detected. In some models, the sensor can differentiate colors of the target by analyzing the intensity of reflected light in different wavelengths, similar to a color sensor that measures red, green, and blue components . This enables stable detection even when the target's color or distance changes. In summary, the display color of a fiber optic sensor is not fixed; it can be red, blue, pink, or infrared, chosen based on the detection requirements, target surface properties, and whether visibility to humans is desired .