Optical imaging lens

Abstract

The invention relates to the technical field of lenses. The invention discloses an optical imaging lens which includes thirteen lenses, a first lens has a positive refractive index, and an object sidesurface is a convex surface; a second lens and an eighth lens are convex-concave lenses with negative refractive indexes; a third lens is a concave-concave lens with negative refractive index; a fourth lens is a concave-convex lens with a positive refractive index; a fifth lens, a sixth lens and a thirteenth lens are convex-convex lenses with positive refractive indexes; a seventh lens has a positive refractive index, and an object side surface of the seventh lens is a convex surface; a ninth lens is a convex-concave lens with a positive refractive index; a tenth lens is a plano-convex lens with a positive refractive index; an eleventh lens and a twelfth lens are concave-convex lenses with negative refractive indexes; the eighth lens and the ninth lens are glued together, and the tenth lens and the eleventh lens are glued together. The system has the advantages of high resolution, small chromatic aberration and good imaging quality; the high and low temperature defocusing is small orno defocusing is caused; light transmission is large, the relative illuminance is high, and the image surface is large.

Description

technical field [0001] The invention belongs to the technical field of lenses, and in particular relates to an optical imaging lens. Background technique [0002] With the continuous advancement of science and technology and the continuous development of society, optical imaging lenses have also developed rapidly in recent years, and are widely used in smart phones, tablet computers, video conferencing, vehicle monitoring, security monitoring, intelligent transportation systems, etc. Therefore, the requirements for optical imaging lenses are getting higher and higher. [0003] In intelligent transportation systems, the performance of optical imaging lenses is critical and will affect the reliability of the entire system. However, the optical imaging lens with a focal length of 12mm currently used in intelligent transportation systems has poor control over transmission, low resolution, low resolution, and uneven images; large edge chromatic aberration and poor color reproduc...

AI Technical Summary

Problems solved by technology

However, the optical imaging lens with a focal length of 12mm currently used in intelligent transportation systems has poor control over transmission, low resolution, low resolution, and uneven images; large edge chromatic aberration and poor color reproduction; it is used in high and low temperature environments. The out-of-focus is serious; the light is generally relatively small, and in low-light environments, the amount of light entering is low, and the shooting picture is dark; the image surface is small, and the size of the image surface generally can only reach 16mm, and the incident angle of the chief ray is relatively large. , CRA is greater than 12°, and the relative illumination is low, less than 40%, which can no longer meet the increasing requirements of intelligent transportation systems, and urgently needs to be improved

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