What is the difference between a photo-interrupter and an opto-isolator?

Expert Solution

opto isolator

an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light

Opto-isolators prevent high voltages from affecting the system receiving the signal

A common type of opto-isolator consists of an LED and a phototransistor in the same opaque packageUsually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.

photo - interrupter

A photointerrupter is transmission-type photosensor that integrates optical receiving and transmitting elements in a single package . Since the method involves light blocking ROHM calls this device a photointerrupter.

A long life GaAs infrared photodiode is utilized for output while a single phototransistor and photo IC are integrated for light detection

ROHM photointerrupters are available in two types: insertion and dual mold

Dual mold photointerrupters are generally more compact than their insertion-type counterparts

genius_generous answered 1 month ago

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