South Korea’s LetinAR is building optics behind AI glasses

South Korean startup LetinAR is at the forefront of developing advanced optical technology for AI-powered smart glasses. The company has successfully secured $18.5 million in new funding from investors including Korea Development Bank and Lotte Ventures, bringing its total raised to $41.7 million, ahead of a planned 2027 IPO. This investment underscores the increasing momentum in the smart glasses market, projected to exceed 15 million units shipped this year.

LetinAR specializes in creating the tiny, sophisticated optical modules that project images directly into a user's field of vision. These components are crucial for the mass adoption of smart glasses, as they must be light, thin, and power-efficient while delivering sharp, clear images. The company's innovative PinTILT technology addresses the industry's core challenge of achieving high image brightness and efficiency within a compact form factor.

Unlike traditional methods, PinTILT focuses light precisely into the eye, minimizing dispersion and maximizing battery life—a critical advantage in wearable technology. This approach allows for thinner, lighter lenses compared to inefficient waveguide systems or bulky birdbath alternatives.

LetinAR's modules are already being utilized by customers such as NTT QONOQ Devices and Dynabook. Notably, its technology powers the Aegis Rider AR helmet, which displays navigation and safety alerts directly onto the road for motorcyclists. The company is also in discussions with major tech firms for next-generation AI glasses R&D.

With the AI glasses market transitioning from early adopters to mass production, LetinAR aims to scale its operations. CEO Jaehyeok Kim believes that hardware devices like AI glasses represent the next significant platform for integrating AI into daily life.