Patent ID: 8638496
Filing Date: 2014-01-28
Classification: G02B

Abstract:
1. A variable power optical system on a common optical axis for forming a final image of an object, said system having an object side and an image side and at least one intermediate real image between the object and the final image, said system comprising: at least a first variable power optical component located between the object and an intermediate real image formed by the first variable power optical component on the image side of the first variable power optical component, the first variable power optical component being located adjacent to the intermediate real image, wherein the first variable power optical component varies power to change a magnification of the intermediate real image; at least a second variable power optical component located between the intermediate real image and the final image, wherein the second variable power optical component varies power to change a magnification of the final image; and a lens with a fixed positive power located between the intermediate real image and the second variable power optical component, the lens being located adjacent to the intermediate real image on the image side; wherein at least one of the first and second variable power optical components is stationary on the optical axis and comprises at least two liquids with different refractive properties and at least one variable shape contact surface between the two liquids, with variations in the shape of the contact surface producing a change of optical power in the optical system.