Variable power lens system.

摘要: In one form the lens power may be varied (Fig. 1) and in another selectively fixed a carrier material 8). There are no moving mechanical parts but instead an optically active molecular such as liquid crystals. embodiment, (72) control means (60, 54, 58) for varying of mounted on common substrate (70a) 3). The single optical element 3) or multi-element device Fresnel 7a). A variable gradient index refraction is achievable by applying controlled stimulus field to lens. For example, geometrically configured matrix electrical voltages (52), each at selected addressable location (78c) relative material, provides embodiment 2). thin film finds applications magnifying glasses, cameras, telescopes, microscopes, well intraocular contact lenses human eye.