SF4-AH20-H

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Optical sensors are being used in a variety of applications. Photointerrupters are an optical sensor comprised of a light emitter and a light receiver. Photointerrupters are used to detect presence, motion or speed of moving objects. A slot type photointerrupter has a slit between the transmitter and the receiver. When an object passes through the slit, the light is blocked, allowing the receiver to detect the absence of light. This type of photointerrupter has an output digital logic signal.

One example of a slot type photointerrupter with a digital logic output is the Sharp FX4-AH20-H photointerrupter. This device is a 4-pin, thru-beam type photointerrupter, and consists of a pair of optics: a Light Emitting Diode (LED) and a Photo Transistor (PT). The device is designed to be operated with a DC voltage supply of between 3 and 5V.

The device is housed in a 4-pin DIP package and is suitable for surface mount applications. The active sensing range is from a scant 3 mm to a maximum of 12 mm, making it ideal for size-sensitive applications. It is designed to operate with a left output slave. The LED has a viewing angle of 60 degrees, which allows for a wider area to detect objects.

The normal mode of operation of the FX4-AH20-H is such that both the LED and the PT are initially OFF (no output). When an object passes through the slit, the LED light is interrupted and blocked from the PT. The PT will then detect the absence of light and will generate an ON state signal on the output. The output is logic high, with an output current of up to 50 mA, and will remain ON until light is re-established.

The FX4-AH20-H is widely used in applications where an object needs to be detected, such as in medical, automotive, industrial automation, vending machines and security systems. In each of these applications the photointerrupter is used to detect the presence of an object and to generate an output signal in response. For example, in industrial automation, the photointerrupter can be used to detect the position of a part and to actuate a robotic arm which then performs an operation on the part.

To conclude, the Sharp FX4-AH20-H is a slot type photointerrupter with an output logic signal and is suitable for a wide range of applications. It is a 4-pin device with an active sensing range of between 3 and 12 mm, making it ideal for size-sensitive applications. It is commonly used in applications such as medical, automotive, industrial automation, vending machines and security systems. Through the use of the FX4-AH20-H, objects can be quickly and accurately detected, leading to enhanced safety, efficiency and productivity.

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