Lens capable of eliminating stray light and manufacturing method thereof

Abstract

The invention discloses an aspherical lens of great stray light suppression effect and a manufacturing method thereof. The aspherical lens comprises a lens. The center of the lens is an aspherical curved surface. The aspherical lens is characterized in that the edges of the lens are provided with flange plates, the center and the edges of the lens are different in color and the edges of the lens are provided with clip ports. The aspherical lens is manufactured by a one-step formation method. The manufacturing method is simple so that the technical requirement for exquisite abrasive blasting for the edges of the lens can be reduced. According to the spherical lens, the center and the edges of the lens have two colors so that the stray light can be effectively suppressed and the frame photographing quality of the camera can be enhanced.

Description

technical field [0001] The invention relates to the field of optics, in particular to a lens capable of eliminating stray light and a manufacturing method thereof. Background technique [0002] With the continuous advancement of technology, the functions of smart phones are becoming more and more comprehensive, and the photography function has become a very critical function in smart phones, but stray light often occurs on the lenses of the mobile phone. [0003] Among them, stray light is the general term for abnormally transmitted light in the optical system. It is caused by light leakage, residual reflection on the light-transmitting optical surface, and residual reflection on non-optical surfaces such as the inner wall of the lens barrel, which will lead to attenuation of the performance of the imaging system and make the modulation transmission of the lens The decline of the function will harm the imaging quality of the lens, which is manifested in the reduction of imag...

AI Technical Summary

Problems solved by technology

from figure 2 and image 3 It can be seen that the existing mobile phone lens does not completely eliminate stray light

[0005] Plastic aspheric lens design notch and flange surface sandblasting have been widely used in lens mechanism design. Part of the stray light can be eliminated by sandblasting the surface of the lens, but the sandblasting technology has the following disadvantages: 1) The side of the notch of the lens cannot Sandblasting; 2) The sandblasting technology at the critical point of the invalid diameter and the effective diameter is relatively difficult to control; 3) With the existing sandblasting technology, it is difficult to ensure the accuracy of the sandblasting surface of the lens assembly plane; Part of the scattered light will fall to the image surface through refraction and reflection at a certain angle, resulting in stray light

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