OPB120B

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Optical Sensors - Photointerrupters - Slot Type - Logic Output

Optical sensors are opto-electronic devices which detect the presence or absence of light, detecting the position of an object, the distance between objects, and other light-related phenomena. A photointerrupter is a type of optical sensor that uses a beam of infrared light passing between a transmitter and a receiver to detect the presence or absence of an object or signal in a predetermined area. These devices can be used in a variety of applications, including consumer electronics, industrial automation, and other safety-critical applications. One common type of photointerrupter is the slot type logic output (OPB120B) which uses a transistor output to provide an reliable and stable logic output signal when an object is present in the sensing area.

Working Principle

The OPB120B photointerrupter consists of a light emitting diode (LED) and a phototransistor separated by a slot. When an object is located in the slot, the LED and phototransistor are out of alignment and no light is detected by the phototransistor. When no object is present, the LED transmits light to the phototransistor, which produces an output voltage that can be used to mark the presence of an object.

When an external voltage is applied to the LED, the transistor turns on and emits infrared light which is steered through a slot between the transmitter and receiver. When an object passes through the slot, the light is blocked and the phototransistor does not switch on. The output voltage from the transistor indicates the presence or absence of an object in the sensing area.

Application Field

The OPB120B is ideal for a wide variety of applications, including industrial automation, consumer electronics, and safety-critical applications. The device has a wide operating temperature range and can be configured to provide reliable operation in high speed environments. Its low voltage requirements and long sensing range make it suitable for use in low-power applications.

The OPB120B is also widely used in automotive applications such as seat occupancy detection, seatbelt pre-tensioners, and window closure detection. It can be used in combination with a variety of other sensors such as pressure or ultrasound sensors to provide an integrated solution for safety-critical applications.

The OPB120B is suitable for use in high-speed precision applications such as metal working and machine tooling, where its high speed and accurate for detecting the presence or absence of objects with minimal lag time. In addition, the device can be used in industrial automation to detect the presence or absence of items on assembly lines or in warehouses.

The OPB120B is also widely used in consumer electronics, such as phone or tablet accessories or gaming consoles, where its low power requirements and wide sensing range make it perfect for use. The device can be used in combination with software to detect the presence of an object and can be easily integrated into existing applications.

Conclusion

The OPB120B is a reliable and accurate slot type logic output photointerrupter, suitable for a wide variety of applications. The device offers a reliable and stable output voltage when an object is present and has a wide operating temperature range and low voltage requirements, making it suitable for use in a variety of settings. The OPB120B is ideal for use in automotive, industrial automation, and consumer electronics applications.

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