3P ultra-wide-angle lens

Abstract

The invention discloses a 3P ultra-wide-angle lens which comprises a first lens, a second lens and a third lens which are sequentially arranged from an object side to an image side, the first lens is a negative lens, the surface, close to the object side, of the first lens is P1R1, the center of the surface P1R1 is concave towards the object side, the surface, close to the image side, of the first lens is P1R2, the center of the surface P1R2 is convex towards the image side, when close to the edge, the lens turns to be concave towards the image side, the second lens is a positive lens, the surface, close to the object side, of the second lens is P2R1, the center of the surface P2R1 is convex towards the object side, the surface, close to the image side, of the second lens P2 is called P2R2, the center of the surface P2R2 is convex towards the image side, and the core thickness is T2. The third lens is a positive lens, the surface, close to the object side, of the third lens is P3R1, and the center of the surface P3R1 is convex towards the object side. The total focal length of the 3P ultra-wide-angle lens is f, and the ultra-wide-angle lens meets the condition that T2 / f is larger than 0.7 and smaller than 1.5.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a 3P super wide-angle lens. Background technique [0002] In the current era of advanced information, the increasing dependence on electronic products makes human beings inseparable from the convenience brought by electronic products, and thus extends the product of mobile phones. In the past, mobile phones were only used to receive messages and answer calls. The invention of the LCD screen and the development of network information make the application in the 3C industry chain more and more demand for the application of optical lens. From the initial VGA model to 2M ~ 5M ~ 8M ~ 13M, the demand for pixels is getting higher and higher. , so mobile phones have gradually replaced the application of digital cameras and become a necessity for everyone to take pictures in their lives. They have also formed the habit of writing diaries for their lives. They will take pictures of their ...

AI Technical Summary

Problems solved by technology

In order to meet the wide-angle effect of traditional camera lenses, multiple optical lenses are usually added to the lens structure to compensate for the distortion. However, the structure of this lens will increase the cost and make the length of the lens very large. The increase in length and outer diameter is not conducive to miniaturization, and will also complicate process assembly, resulting in loss of yield and increased cost

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