https://wccftech.com/razer-becomes-the-first-to-release-optical-switches-on-their-razer-blade-15/

Razer, the leading global lifestyle brand for gamers, today announced the world’s first optical keyboard designed for laptops. Razer was the first to introduce a low-profile mechanical laptop keyboard in 2016 and has now brought next-generation optical switches to the Razer Blade 15 gaming laptop. The low-profile keyboard has been designed for gaming enthusiasts who demand near-instant actuation, satisfying tactile feedback, and rapid-fire inputs.

The new optical laptop switch harnesses the power of light to instantly capture key actuation. Under every key, an infrared light beam is used to detect when a key is pressed (actuation), allowing for much greater precision and speed versus conventional laptop keyboards. The result is a groundbreaking keyboard with an actuation point of only 1mm at 55g of actuation force with 50% more travel, allowing players to input more commands in less time in the heat of battle. On top of lightning-fast actuation, the new keyboard features a satisfying mechanical tactile click – a must for any keyboard connoisseur. The tactile feedback helps users know when an input has been registered and provides a superior typing experience compared to traditional membrane keyboards.