Optical system, camera module and electronic equipment

Abstract

The invention relates to an optical system, a camera module and electronic equipment. The optical system includes, in order from an object side to an image side, a rotatable lens group and a rear lens group, wherein the rotatable lens group includes a first sub-lens having an object-side surface which is a concave surface at a near-optical-axis position and an image-side surface which is a convex surface at a near-optical-axis position, the object-side end and the image-side end of the rotatable lens group is able to be turned to convert the optical system into a telephoto mode; the rear lens group comprises a second lens with positive refraction power, a third lens with negative refractive power, a fourth lens with refractive power, a fifth lens with negative refractive power,and a sixth lens with positive refractive power, the object side surface and the image side surface of the second lens are convex in a near-optical-axis position; the object side surface and the image side surface of the third lens near the optical axis are both concave surfaces; the object side surface of the fourth lens near the optical axis is a convex surface and the image side surface near the optical axis is a concave surface; the object side and image side surfaces of the fifth lens near the optical axis are concave surfaces; and the object side surface of the sixth lens near the optical axis is the convex surface. The optical system can have good imaging quality when switched between a large viewing angle mode and a long focal length mode.

Description

Technical field [0001] The present invention relates to the field of photographic imaging, and more particularly to an optical system, an imaging module, and an electronic device. Background technique [0002] At present, traditional imaging functions, the imaging module with telephoto lenses and large angle lenses will generally be set to correspond to different shooting requirements. For example, when it is necessary to switch from a vision shoot to a large-view field shooting, the terminal system of the electronic device switches the imaging screen of the telephoto lens to the imaging picture of the large view lens, and it is satisfied that the switching range from the narrow angle of view . [0003] However, this traditional design is inevitable to set two or more different types of lenses, while needing the same number of image sensors, this aspect will significantly increase equipment cost, on the other hand, excessive electronic equipment Replace space, thereby hindering m...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an optical system, a camera module and an electronic device for how to reduce the preparation cost and overall size of the camera module.

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