OPB993N11

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Optical Sensors, such as Photointerrupters, are widely used in various industries today, to detect the presence of objects. The OPB993N11 is an example of a Slot Type Photointerrupter, which features a Logic Output. This means it is possible to detect the presence of an object, or its movement across a sensing line, without the need for additional signal processing.

The OPB993N11 consists of two separate parts, an LED light source and an opto-transistor. The light source is mounted on a vertical wall opposite the sensing slot. This wall is fitted with a resistor connected in series with the LED, which limits the current so as to prevent overloading. The opto-transistor is situated on the opposite side of the slot, separated by a small gap. When an object interrupts the light, the opto-transistor switches from on to off, which changes the logic signal level output.

In application, the OPB993N11 is used to detect the presence of an object, or its movement across a sensing line. The LED produces a beam of infrared light, which is passed through the gap between the opto-transistor and across the sensing line. When an object interrupts the beam, the opto-transistor switches from on to off. This change is detected by the logic output, which in turn can be used to control a system or display a signal.

By adjusting the gap between the LED and the opto-transistor, it is possible to set the sensitivity of the sensing line. This means that the OPB993N11 can be used to detect objects of various sizes. For example, the OPB993N11 can be used in conjunction with a hand switch, or a standard switch, in order to detect the presence or absence of a finger or a baton.

The OPB993N11 can also be used as part of a tracking device. In this application, two or more OPB993N11 devices can be arranged along a line, with the optic transistors connected in series. This reduces the sensitivity of the system, but allows for continuous scanning of the sensing line. When an object interrupts the beam of light, the opto-transistor will switch from on to off, triggering the logic output and providing an indication of the objects location.

The OPB993N11 Slot Type Photointerrupter with Logic Output provides a simple, reliable and cost effective solution for sensing small objects or tracking them along a line. With its adjustable gap and high switching rates, it is suitable for a variety of applications, from consumer electronics to industrial automation.

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