Overview Optical coupler DIN 41612 Connectors Suppliers, abbreviated as OC in English) is also known as opto-isolator, or optocoupler for short. Optical couplers use light as a medium to transmit electrical signals. It has a good isolation effect on input and output electrical signals, so it is widely used in various circuits. At present, it has become one of the most diverse and versatile optoelectronic devices. The optical coupler generally consists of three parts: light emission, light reception and signal amplification.

The input electrical signal drives the light-emitting diode (LED) to emit light of a certain wavelength, which is received by the photodetector to generate a photocurrent, which is then further amplified and output. This completes the electrical-optical-electrical conversion, thereby playing the role of input, output, and isolation.

Since the input and output of the optocoupler are isolated from each other, and the electrical signal transmission is unidirectional, it has good electrical insulation and anti-interference capabilities. In addition, since the input end of the optocoupler is a low-resistance element that works in current mode, it has a strong common-mode rejection capability. Therefore, it can greatly improve the signal-to-noise ratio as a terminal isolation element in long-line transmission of information.

As a signal isolation interface device in computer digital communication and real-time control, it can greatly increase the reliability of computer work. The main advantages of optocouplers are: signal one-way transmission, the input end and the output end are completely electrically isolated, the output signal has no effect on the input end, the anti-interference ability is strong, the work is stable, no contact, long service life, transmission efficient.

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