Optical lens, camera module, and electronic device

A camera module, comprising:

• a photosensitive element;
• and
• an optical lens, the optical lens comprising a first lens element group and a second lens element group arranged from an object side to an image side, the first lens element group and the second lens element group being coaxially disposed;
• the first lens element group and the second lens element group each comprise a plurality of lens elements, each lens element comprises an object side surface facing the object side and an image side surface facing the image side;
• the first lens element group has positive optical power, and the second lens element group has negative optical power;
• the second lens element group being movable relative to the first lens element group in an axial direction, a distance Δd for which the second lens element group is movable relative to the first lens element group satisfies the relation:
• Δd≤4 mm, and the second lens element group of the optical lens satisfies the following relation:
• 1.4<|1−β{circumflex over ( )}2↑<3.8, wherein β represents a ratio of an incident angle of light on the second lens element group to an emergent angle of the light, and 1−β{circumflex over ( )}2|1−β{circumflex over ( )}2| represents focal length sensitivity of the second lens element group;
• wherein the photosensitive element is located on the image side of the optical lens, and light is projected onto the photosensitive element after passing through the optical lens;
• and
• a distance between the first lens element assembly and the photosensitive element remains unchanged, and the second lens element assembly is movable along an optical axis between the first lens element assembly and the photosensitive element.

An electronic device, comprising:

• an image processor;
• and
• a camera module, the camera module comprising:
• a photosensitive element;
• and
• an optical lens, the optical lens comprising a first lens element group and a second lens element group, the first lens element group and the second lens element group being arranged from an object side to an image side, the first lens element group and the second lens element group are coaxially disposed;
• the first lens element group and the second lens element group each comprise a plurality of lens elements, and each lens element comprises an object side surface facing the object side and an image side surface facing the image side;
• the first lens element group has positive optical power, and the second lens element group has negative optical power;
• and
• the second lens element group being movable relative to the first lens element group in an axial direction, a distance Δd for which the second lens element group is movable relative to the first lens element group satisfies the relation:
• Δd≤4 mm, and the second lens element group of the optical lens satisfies the following relation:
• 1.4<|1−β2|<3.8, wherein Δ represents a ratio of an incident angle of light on the second lens element group to an emergent angle of the light, and 1−β{circumflex over ( )}2|1−β{circumflex over ( )}2| represents focal length sensitivity of the second lens element group;
• the photosensitive element being located on the image side of the optical lens, and light is projected onto the photosensitive element after passing through the optical lens;
• and
• a distance between the first lens element assembly and the photosensitive element remains unchanged, and the second lens element assembly is movable along an optical axis between the first lens element assembly and the photosensitive element;
• the image processor being communicatively connected to the camera module;
• the camera module being configured to obtain image data and input the image data into the image processor, and the image processor is configured to process the image data.