How does it work

polight tlens operation The poLight® TLens® is constructed around a piezo element (pzt film), which is placed on a thin glass membrane, and plays the role of an actuator. A patented polymer is sandwiched between two high-quality glass layers. The piezo material on the thin glass membrane is designed to spherically deform the polymer when a voltage is applied to the piezo material. This structure offers a tuneable lens of high optical quality.

When the piezo is in standby mode, no force is applied to the thin glass, and light passes through the two elements of glass and the polymer without deviation. When a voltage is applied, the piezo actuator will immediately force the thin glass membrane to bend accordingly. This generates a perfect lens, and an optical power, which focuses the light rays. Due to the optical matching between the glass membrane, the polymer and the supporting glass, and poLight’s unique anti-reflective coating, the optical transmittance is optimised for the visible spectrum.

The characteristics of the piezo element induces a change of focus in the lens within 1 millisecond (ms). As the piezo element is controlled by the voltage (basically no current), power consumption is extremely low, compared with existing VCM-based lenses.

polight implementation

The illustration depicts the structure of the ultra-compact TLens. The technology can handle all sensor sizes up to 1/2″.

The small dimension, limited height and low weight allow for a very robust optical path and simple implementation, as well as excellent performance related to drop tests, durability, etc.