Tunable Lenses for AI and AR/VR Glasses

Ultra-thin and light liquid crystal lenses that actively adjust focus

Home  >  Tunable Lenses for AI and AR/VR Glasses

Adjusting the depth of images in AR and VR glasses

AR/VR devices contain complex optics to create a virtual image in the user’s field of view. However, the virtual image plane is at a fixed distance in today’s devices, leading to the so-called ‘vergence-accommodation-conflict’ (VAC), which causes visual discomfort when the perceived distance to the virtual object is different to its focal length.

Tunable liquid-crystal (LC) lenses provide a route to change focal length dynamically according to the virtual scene, creating a more natural viewing experience thus eliminating eye strain and fatigue.

FlexEnable’s tunable liquid crystal lenses, built on optically ideal plastic (TAC) substrates, can actively adjust focus, bringing perceived and actual image depth together consistently, by compensating for focal differences between the virtual and the real.

At less than 100 microns thick and weighing a fraction of a gram, our lenses can be stacked for increased focal power or combined with other flexible liquid crystal cells to provide additional features such as ambient dimming.

This breakthrough technology can be biaxially formed around existing optical components, further minimising product volume and improving optical performance for the user compared to planar glass optical components.

Switchable reading glasses

FlexEnbale’s tunable lenses can be integrated into AI / smart glasses to enable switchable reading glasses. In that way, users can switch between reading mode and normal prescription lens (or no prescription) mode. This functionality could significantly improve users’ comfort by removing the need to manage multiple pairs of glasses or swapping between AI glasses and reading glasses.

Benefits

  • Multi-dioptre lens power (push and pull lenses)
  • Large lens aperture: 30mm or more
  • Lightweight (<0.5g) and ultra-thin (100 micron) cells
  • Stackable for additional power and features
  • Polarisation independent – focus unpolarised light
  • Biaxial curvature – easily integrated into optics
  • Can be combined with our ambient dimming technology
  • Low power consumption

The technology

FlexEnable has developed a complete low-temperature manufacturing process for producing liquid crystal optics on lightweight, ultra-thin flexible substrates. Our tunable lenses are built on TAC film, a bioplastic with optical properties equivalent to glass, including low birefringence and high transmission. TAC retains these properties even after thermoforming to biaxial curves, making it an ideal material for the complex curvatures of AR and VR optics.

Contact us