They are relatively small, inexpensive to produce, and effective at limiting voltage levels across multiple circuits. Opto isolators transfer data at incredibly high speeds. Likewise, devices that use infrared light to control or share files with other devices might use an optical isolator to prevent invalid data or commands in the output device. For example, alarm systems that use broken beams of light to trigger an alarm might use an optical isolator to prevent false alarms. Optical isolators can also be used in other photonic systems that depend on light to transfer data or connect two circuits. For example, optical isolators are used in long distance fiber optic communication systems in order to prevent signals from being distorted before reaching the output device.

Optical isolators are also used in a number of optical systems. In fact, this application of opto isolators has allowed them to be used in electroencephalography or EEG to transfer information recorded from a patient’s brain. Opto isolators are also used in computer systems for data transfer by modulating the output voltage of a primary circuit and using light as a medium. Opto isolators are ideal for the recording industry because they reduce all interference that would have been generated by passing a voltage directly from one circuit component to another. Photodiodes and phototransistors are the two most common light receivers. They also have a small light source or LED to send signals and a photosensitive component to receive transmissions. Both types of optoisolators have a casing to prevent outside light from interfering with the device operation. Analog optoisolators reproduce the input signal and provide an analog output that is used when the signal amount is the circuit requirements’ overriding factor. The digital type changes its output to match the signal received and is used when pulse or bit output is required between circuits. There are two types of optoisolators-digital and analog.

This allows the input of the secondary component to be equal or slightly less than the output of the primary component. The electricity is then directed to the other components within that circuit. The light beam travels down the closed channel until it reaches the photosensor that then converts the light back into electricity. A voltage from a circuit is used as the isolator’s power source and is used to produce a beam of near-infrared light. Opto isolators consist of a power source, a near-infrared LED, a closed channel, and a photosensor. They now cost less than US$1 and continue to get cheaper. They are good for quality control in the recording industry, and can be used in other industrial applications such as electroencephalography, data transfer, and optoelectronics. The cost of these devices have significantly reduced since they were first invented. Opto isolators regulate voltage levels by converting electricity into a beam of light. This prevents voltage spikes from impacting more than a single circuit and decreases the overall interference and noise that occurs with traditional communications connections. An opto isolator is an electronic device that prevents high voltages from components in one side of a circuit from damaging or interfering with components on the other side of the same circuit.

Uses for an optical isolator