Zoom lens and imaging device

Abstract

A zoom lens includes, in sequence from an object side to an image side along an optical axis, first to sixth lens groups respectively having positive, negative, positive, positive, negative, and positive refracting powers. The first lens group includes a reflecting member for bending the optical axis by substantially 90 degrees. The first and third lens groups remain stationary on the optical axis when the zoom lens zooms or focuses. Zooming is performed by moving the second, fourth, and fifth lens groups along the optical axis. Focusing is performed by moving the fourth lens group and / or the fifth lens group along the optical axis. Image shift is performed by moving the sixth lens group in a direction substantially perpendicular to the optical axis. The fourth lens group includes a single positive lens and a single negative lens.

Description

technical field [0001] The present invention relates to a novel zoom lens and an imaging device, and more particularly, the present invention relates to a technique for increasing the zoom ratio of a zoom lens using a so-called curved optical system to reduce the thickness in the direction of the optical axis of incident light . Background technique [0002] In recent years, imaging apparatuses such as digital cameras using solid-state imaging devices have become popular. With the popularization of digital cameras, it is expected to have better image quality. There is an increasing demand for photographic lenses (especially zoom lenses) to be equipped with digital cameras having extremely high pixels, which have good imaging performance by utilizing solid-state imaging devices with a large number of pixels. In addition, it is desirable for digital cameras to be small in size. Therefore, a compact high-performance zoom lens is required. Some cameras have been further redu...

AI Technical Summary

Problems solved by technology

However, an increase in the zoom ratio will cause image quality to deteriorate due to hand shake, since the thinner camera cannot be held stably

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