Optical Key Switch

Optical key switch became popular around 2016, due to the Bloody B840 Light Strike Keyboard using the “Bloody LK Optic 2 switch”.

Bloody B840 LK

Optical switch is great because it does not need metal contact. Meaning, no wear, last longer, and easier to be water resistant.

Optical Key Switch keyboards

There are a lot. Here's a few example.

Bloody B840 LK

• Keychron Keyboard

• Cleave Keyboard

• Invac PK-200 keyboard. 1966