TDK Corporation has demonstrated a flat retinal projection display designed for lightweight smart glasses. The optical system uses nanoscale reflectors on a flat surface to project images directly onto the eye without bulky curved mirrors. Working prototypes will appear at upcoming industry trade shows, while commercial pricing remains unannounced.
Traditional direct retinal projection systems require curved glass elements sitting right in front of the eye. TDK eliminates that bulk by applying nanoscale reflectors across a completely flat plane. These microscopic structures alter the reflection angle of the incoming laser beam based on its exact position on the mirror, directing light straight into the retina.
The resulting mirror measures just 150 nm thick and sits directly inside the eyewear lens. It offers 80% light transparency, making the smart glasses look identical to normal prescription frames. The optical path also blocks light from spilling outward, meaning nearby people cannot see what the wearer is viewing.
TDK uses a proprietary full color laser module to generate the visual feed. The accompanying visible spectrum controller can deliver output resolutions reaching up to 4K. While the laser source supports full color, the current meta optical mirror prototype only renders visuals in monochrome.
Engineers are working to add full color capability to the mirror before scaling up commercial production over the next few years. TDK plans to showcase the working hardware at CEATEC and electronica. Pricing details and consumer release windows will follow closer to mass manufacturing.
