A star-level high-definition day and night confocal optical lens

Abstract

The invention provides a starlight-level high-definition day and night confocal optical lens, and belongs to the technical field of optical lenses. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and a photosensitive chip, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the photosensitive chip are disposed in order from the object plane to the image plane along the optical axis. An aperture is disposed between the second lens and the third lens, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are glass spherical lenses. The seventh lens is a plastic aspherical lens, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are negative, positive, negative, positive, positive, negative and positive. The optical lens can change the number of lenses, can iron out the defect that the resolution is not satisfactory under the large aperture, also can reduce the size of the lens, and also can reduce the production cost.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, in particular to a star-level high-definition day and night confocal optical lens. Background technique [0002] With the help of infrared fill-in light technology, although traditional lenses can obtain clear images under low illumination, they can only form black-and-white images, and after using infrared fill-in light, highly reflective objects are easily overexposed, so low-light images There is an increasing demand for clear color imaging. With the advancement of technology and the emergence of high-sensitivity chips, the pace of development in the security field is also accelerating, and various smart high-definition cameras are widely used in various fields. Therefore, it has become an inevitable trend to develop a star-level lens that can obtain clear and bright color images under low-light conditions. Although there are some star-level and infrared confocal optical lenses emergi...

AI Technical Summary

Problems solved by technology

However, the complex structure of the lens group increases the difficulty of processing and production, and the imaging resolution of the camera is low

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