A piezo element, playing the role of an actuator, is placed on a thin glass membrane. A patented polymer is sandwiched in two high quality glass layers. The piezo material on the thin glass membrane is design to spherically deform the polymer when a voltage is applied on the piezo material. The structure is such that by nature it is offering a high optical quality tuneable lens.
When the piezo is in standby mode it does not apply any force to the thin glass. The light going through the two elements of glass and through the polymer is not deviated. Once a voltage is applied, the piezo actuator immediately forces the thin glass membrane to bend accordingly. This generates a perfect lens and an optical power allowing the lightrays to focus. Due to the optical matching between the glass membrane, the polymer and the supporting glas and our unique anti-reflective coating the optical transmittance is optimized for the visable spectrum. The characteristics of the piezo element forces the lens to change focus in the range of 1 mS. Since the piezo element is controlled by the voltage (basically no current) the power consumption will be extremely low (in the range of 50 times lower than traditional VCMs).
The illustration on the left hand side depicts the structure of the ultra compact TLens. The technology is capable of handling all sensor sizes up to 1/2¨.
The small dimension, limited height and low weight allow for a very roboust optical path and a simple implementation as well as excellent performance related to drop tests, durability, etc.