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What is a Photointerrupter?

What is a Photointerrupter?

1. Photointerrupter

Transmission-type photosensors, which typically consist of a light emitting element and light receiving element aligned facing each other in a single package, operate by detecting light blockage when a target object comes between both elements, acting like an optical switch.
At ROHM, we refer to optical-type photosensors as photointerrupters.
Unlike mechanical switches, photointerrupters are non-contact (optical) switches, improving reliability by preventing wear-and-tear due to abrasion (contact).

Optical-type Photosensor (Photointerrupter)

Optical-type Photosensor (Photointerrupter)

PhotointerrupterProduct Page
2. Reflector-type Photosensors (Photoreflectors)

Reflector-type photosensors (Photoreflectors) are configured by positioning light receiving and emitting elements on the same surface.
They detect the presence and position of objects based on the reflected light from the target object.

Reflector-type Photosensors (Photoreflectors)

Reflector-type Photosensors (Photoreflectors)

Reflector-type PhotosensorsProduct Page

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