SD1420-002L

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Optical Sensors - Photodiodes are one of the most popular and widely used semiconductor devices. It plays an important role in many applications, such as optical measurement, communication, environmental monitoring, biology, etc. They detect light intensity, incident direction, and phase shifts, and convert them into electrical signals. SD1420-002L is one of the photodiode types, which is specialized in the long-distance barcode reading. It consists of a visible light detector and a photodetector, and it can achieve high coding accuracy over long distances.

The application field of SD1420-002L mainly focuses on the reading/scanning devices in various areas such as logistics, automotive, warehouse management, manufacturing, and retail. These devices are used to monitor and identify items for proper delivery. The firmware of the device reads the 2D/1D barcodes as they are passed in front of the sensor, and the system communicates with the reading system to deliver information about the items. By using the optical sensor like SD1420-002L, the system can accurately recognize the digital forms of barcode patterns from a long distance, usually from 300mm to 400mm.

The working principle of SD1420-002L is based on the “Opportunity Detection” system. This system uses optical diodes with visible light filters to detect faint objects. The diodes are placed in the emitter, and the signal is sent to the photodetector. The photodetector is composed of four main parts including the sample and hold, detector, logic gate, and amplifier. The sample and hold will collect the signal and hold it while the detector locates and identifies the barcode pattern from the signal. The logic gate will separate the digital shape pattern from the noise while the amplifier will increase the magnitude of the signal. The output of the amplifier will be sent to the reading system, and after the data analysis, it will show the code of the item that was scanned.

All in all, SD1420-002L optical sensor is a widely used photodiode that is typically used for 1D/2D barcode reading in various application areas. Its Opportunity Detection system and long-distance detection ability make it a great choice for inventory and tracking applications. It can accurately detect the digital forms of barcodes pattern with high accuracy and easy implementation.

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