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Blue light is a part of the visible light spectrum that has a shorter wavelength and higher energy than other colours such as red or green. This makes it ideal in the field of optical sensors (as a blue emitting LED) because with innovative BlueLight technology, it can be reliably used to detect simple objects on the one hand and objects that are difficult to detect on the other.
BlueLight technology is a system that takes advantage of the shorter wavelength in blue light. Less able to be absorbed, it reflects back to the sensor more readily therefore providing a more reliable object detection.
Dark to deep black objects absorb so much light that red light sensors can fail to measure sufficient reflected light, therefore making them difficult to detect. These include items such as black plastic clips, dark sealing rings, components made of carbon fibres or matt black door panels.
Transparent objects, such as glass, reflect only a small part of the emitted light making them difficult to detect, causing switching signals to be ambiguous/inaccurate. Typical examples of transparent objects in industry are: clear plastic packaging, bottles made of glass or PET, ampoules and pipettes, clear foils for securing loads on pallets.
The challenge with reflective surfaces is that once the light has been sent out, it can be reflected away by surfaces such as smartphone displays so that insufficient light bounces back to the receiving element, making detection impossible. But with blue-emitting LEDs, more light is able to return to the BlueLight sensor, allowing for reliable detection.
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