Optical lenses

Abstract

The invention discloses an optical lens, which comprises a lens, at least one light-absorbing layer and at least one optical film. The lens has a central zone and a peripheral zone surrounding the central zone. At least one light-absorbing layer and at least one optical film are disposed on the lens in the peripheral area and expose the central area. Each optical film includes at least one first layer and at least one second layer. The refractive index of at least one second layer is lower than the refractive index of at least one first layer. At least one first layer and at least one second layer are stacked alternately, and at least one of the at least one first layer and the at least one second layer has an extinction coefficient greater than zero in the visible light band. The present invention arranges at least one light-absorbing layer and at least one optical film on the peripheral area of ​​the lens to reduce the transmittance and reflectivity of the peripheral area of ​​the lens, thereby improving the problem of stray light.

Description

technical field [0001] The present invention relates to an optical element, and in particular to an optical lens. Background technique [0002] With the ever-changing specifications of portable electronic products, its key components—optical lens sets are also more diversified. The applications are not limited to shooting images and videos, but also include environmental monitoring, driving record photography, etc., and with the development of image sensing technology With the progress, consumers' requirements for imaging quality have also increased. [0003] In the optical imaging lens, the light beam entering the optical lens group at a large angle is easily reflected or refracted by the edges of one or more optical lenses to form stray light. In order to reduce the negative impact of stray light on image quality, the prior art mainly filters the stray light by setting a shading element or blackening the edge of the optical lens. However, the optical imaging lens provide...

AI Technical Summary

Problems solved by technology

However, the optical imaging lens provided with shading elements is not only difficult to maintain better assembly accuracy, but also has the problem of easily affecting the imaging quality due to poor assembly

On the other hand, blackening the edges of optical lenses has limited effect on improving the stray light problem

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