Tunable - Focus Liquid Crystal Lens

Tunable electronic lens using a gradient polymer network liquid crystal

Tunable electronic lenses using gradient polymer network liquid crystal ~PNLC! cells were demonstrated. By changing the photomask pattern, both positive and negative lenses were fabricated. The advantages of such a PNLC lens are low operation voltage, large aperture size, and simple electrode design. To overcome the polarization dependence, stacking two orthogonal homogeneous PNLC cells is cons...

Tunable-focus microlens arrays using nanosized polymer-dispersed liquid crystal droplets

A microlens array made of polymer/nanosized polymer-dispersed liquid crystal (nano-PDLC) is demonstrated. The polymer was first patterned into microlens array cavities on a planar substrate and the molded polymer cavities were filled with nano-PDLC material. The nano-PDLC-based microlens is optically transparent. The focal length of the microlens is electrically tunable and the response time is...

An electrically tunable imaging system with separable focus and zoom functions using composite liquid crystal lenses.

We demonstrated an electrically tunable optical image system with separable focus function and zoom function based on three tunable focusing composite liquid crystal (LC) lenses. One LC lens in charge of the focus function helps to maintain the formed image at the same position and the other two LC lenses in charge of zoom function assist to continuously form an image at image sensor with tunab...

Liquid crystal lens with large focal length tunability and low operating voltage.

We demonstrate a tunable focus liquid crystal (LC) lens by sandwiching a homogeneous LC layer between a planar electrode and a curved electrode. The curved electrode which is made of conductive polymer has parabolic shape with a large apex distance. Such design dramatically reduces the phase loss which leads to a short focal length (~15 cm). By using a thin top glass substrate on the curved ele...

Head Mounted Display with Curved Display Screen, Curved Tunable Focus Liquid Crystal Micro-Lens and First and Second Curved Black Masks Corresponding independently to One of the Right and Left Eye