Zoom lens of the telephoto type having a liquid lens in a fixed group

摘要

A zoom lens (60) of the telephoto type comprising: an axially movable lens group (G2); an axially stationary lens group comprising one liquid lens cell (LC) comprising a first and a second contacting liquids, a contacting optical surface (21) between the contacting liquids having a variable shape; and an optical element that redirects the radiation axis; wherein the axially movable lens group (G2) and the axially stationary lens group (LC) are aligned on a common optical axis (38) and collect radiation emanating from the object side (1) of the zoom lens and deliver the radiation to the image side (36). In some embodiments, the system also provides compensation for undesirable thermally induced effects by adjustment of the zoom group and the variably shaped optical surface in the liquid lens cell.