Question:
How do light convergent reflective Optical Sensors work?
Answer:
Light convergent reflective Optical Sensors work by emitting an LED signal that will reflect off of an object in front of the sensor, and be received by the built-in detector. These sensors have optical properties that enable them to detect objects of varying material characteristics, including reflective and transparent. As a result, the sensing area of light convergent reflective sensors is limited.
Explanation:
There are two types of light reflective sensors: light diffuse reflective type and light convergent reflective type. The light convergent reflective type is designed to receive specular reflection from the surface of objects by focusing the optical path of the emitter and detector. The sensors detect objects with low reflectivity because their luminous flux becomes concentrated. As the figure/graph (correlation between receiver output and distance) shows, the sensing area of this type is limited. The light convergent reflective sensors are suitable for detecting objects without concern for the background conditions.
Quick tips
B5W-LB series are equipped with Omron’s original optical lenses, a combination of 4 toroidal lenses, that enable stable object detection with a small amount of light reflection without the influence of colors or surface conditions of objects. B5W-LB sensors are capable of detecting black papers or transparent glasses by utilizing the side sensing area. B5W-LB sensors are not affected by background objects with high reflectivity if the background objects are located far from the sensing area.
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