Image pickup system

Abstract

The invention discloses an image pickup system. The system sequentially comprises a first lens, a second lens and a third lens from an object side to an image side along an optical axis, wherein the first lens has positive focal power and an image side surface is a convex surface; the second lens has negative focal power, and the the image side surface of the second lens is a concave surface; the third lens has positive focal power; and the distance TS3 from the diaphragm of the image pickup system to the image side surface of the third lens on the optical axis and the distance TTL from the object side surface of the first lens of the image pickup system to the imaging surface on the optical axis meet the following condition: 0.2 < TS3 / TTL < 0.3. By controlling the on-axis distance from the object side surface of the first lens to the imaging surface and the distance from the diaphragm of the image pickup system to the image side surface of the third lens on the optical axis, the ultra-thin characteristic of the lens is ensured, the lens miniaturization is realized, the space utilization rate of the whole machine is improved, the convex phenomenon of the lens is reduced, and the attractive appearance of the whole machine is ensured.

Description

technical field [0001] The invention belongs to the field of optical imaging, in particular to a camera system including three lenses. Background technique [0002] In recent years, consumers have higher and higher requirements for mobile phone shooting functions, and functional requirements such as face recognition and distance measurement have emerged as the times require. However, due to the complexity of the shooting environment, it is difficult to obtain clear images in dim environments. At present, The mobile phone lens is limited in imaging the environment with insufficient light, and cannot achieve a very clear imaging effect. At this time, the infrared lens can solve this problem very well. [0003] The infrared lens can enhance the light input of the entire imaging system by collecting infrared light in the shooting environment. Compared with the multiple shooting algorithm synthesis of the night scene mode of the mobile phone lens in the past, the image resolution...

AI Technical Summary

Problems solved by technology

[0002]In recent years, consumers have higher and higher requirements for mobile phone shooting functions, such as face recognition, distance measurement and other functions. Complicated, it is difficult to get a clear image in a dim environment. The current mobile phone lens is limited in imaging in an environment with insufficient light, and cannot achieve a very clear imaging effect. At this time, the infrared lens can solve this problem very well

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