OPB981T55

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The OPB981T55 is an optically slot type photointerrupter with logic output. This component is capable of recognizing the presence of an object and making a very fast output transition. It has a wide range of applications such as medical, industrial, and automotive.

The OPB981T55 is a two piece photointerrupter composed of an infrared LED and a phototransistor, encased in a black plastic body. The components work together to detect the presence of an object in a small aperture. When the object is detected, an output signal is triggered, which in turn is received by the host controller.

The OPB981T55 photointerrupter has a maximum operating voltage of 5V and a current rating of 150mA. The voltage and current requirements can be adjusted with the use of external power regulators or transistors. It also features a fast response time of up to 1000 Hz for a quick response when required.

The most common application for the OPB981T55 photointerrupter is to detect the position and/or timing of mechanical parts such as a camshaft, crankshaft, or other rotating objects. This device is also used in industrial automation for edge detection, positioning, and coding. It can also be used in security applications such as to detect the presence of a door or window.

The working principle of the OPB981T55 is simple. When light is receiving by the phototransistor, it will emit an output voltage that is a voltage level compatible with a TTL-compatible logic gate. When an object such as a finger is detected, it will interrupt the light path between the LED and phototransistor, resulting in an output voltage of nearly zero.

The photointerrupter can also be used for detecting the position of moving objects in a more precise way. By using an additional optical filter, the device can be calibrated to a specific wavelength or light spectrum. When a specific light spectrum is detected, the device will output the associated output voltage.

The OPB981T55 optical slot type photointerrupter is a versatile device with a wide range of applications. It can be used for parts positioning, edge detection, encoding and decoding, timing, and security solutions. With its fast response time and wide range of operating voltage and current ranges, this device can be used in a variety of applications in medical, industrial, automotive, and consumer electronics.

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