Imaging lens with variable focus distance

Abstract

The invention discloses an imaging lens with a variable focus distance. The imaging lens with the variable focus distance comprises a first lens group with negative refracting power, a second lens group with positive refracting power, and a third lens group with positive refracting power from the object side to the image side in turn, wherein only two lenses in the first lens group have the refracting power; the first lens group comprises a first lens with negative refracting power and a second lens with negative refracting power from the object side to the image side in turn; the second lensgroup comprises an aperture, a third lens and a fourth lens from the object side to the image side in turn; the third lens group comprises a fifth lens; and the number of the lenses with the refracting power in the imaging lens with the variable focus distance is N which accords with the following relational expression: N is more than or equal to 5 and less than or equal to 7, and the lenses withthe refracting power in the imaging lens with the variable focus distance comprise at least three non-spherical lenses.

Description

technical field [0001] The invention relates to a variable focal length imaging lens, in particular to a miniaturized variable focal length imaging lens applied to portable electronic products. Background technique [0002] In recent years, with the rise of portable electronic products with photographic functions, the demand for miniaturized photographic lenses has increased day by day, and the photosensitive element of general photographic lenses is nothing more than a charge coupled device (CCD) or complementary There are two types of Complementary Metal-Oxide Semiconductor Sensor (CMOS Sensor), and with the advancement of semiconductor manufacturing technology, the pixel size of the photosensitive element is reduced, and the miniaturized photographic lens is gradually developing towards the high-pixel field. Therefore, The requirements for image quality are also increasing. [0003] Commonly seen miniaturized photographic lenses are mostly single-focus designs, and the m...

AI Technical Summary

Problems solved by technology

[0003] Commonly seen miniaturized photographic lenses are mostly single-focus designs, and their manufacturing process is relatively simple and the cost is relatively low. However, it is difficult for a photographic lens with a single focal length to meet the different requirements for magnification or field of view when shooting distant and close objects at the same time. , causing the user to be equipped with multiple lenses to meet the shooting of distant and close objects, which is really inconvenient

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