High-definition confocal optical imaging lens

Abstract

The invention relates to the technical field of lenses. The invention discloses a high-definition confocal optical imaging lens. The high-definition confocal optical imaging lens sequentially comprises first to fourteenth lenses from an object side to an image side along an optical axis. The first lens is a convex-concave lens with a positive refractive index, the second lens is a convex-concave lens with a negative refractive index, the third lens is a concavo-concave or plano-concave lens with a negative refractive index, the fourth lens, the tenth lens and the thirteenth lens are all concavo-concave lenses with negative refractive indexes, and the fifth lens, the ninth lens, the eleventh lens, the twelfth lens and the fourteenth lens are convexo-convex lenses with positive refractive indexes; the sixth lens has a positive refractive index, the object side surface of the sixth lens is convex, the seventh lens and the eighth lens are concave-convex lenses with positive refractive indexes, and the fourth lens and the fifth lens are glued with each other; the ninth lens and the tenth lens are glued with each other; and the twelfth lens and the thirteenth lens are glued with each other. The lens has the advantages of large image surface, large field angle, high resolution, large light transmission, good chromatic aberration and aberration correction, high imaging quality and no out-of-focus at high and low temperatures.

Description

technical field [0001] The invention belongs to the field of lens technology, and in particular relates to a high-definition confocal 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. Optical imaging lenses are widely used in smart phones, tablet computers, video conferencing, security monitoring, machine vision, and vehicle monitoring. Therefore, the requirements for optical imaging lenses are getting higher and higher. [0003] However, there are still many deficiencies in the current optical imaging lenses used for motion capture, such as generally small imaging surface, small field of view, and narrow range of motion that can be captured; single visible light design is often used, or infrared switching film is used to achieve infrared confocal The design has limitations and unreliability in application...

AI Technical Summary

Problems solved by technology

[0003] However, there are still many deficiencies in the current optical imaging lenses used for motion capture, such as generally small imaging surface, small field of view, and narrow range of motion that can be captured; single visible light design is often used, or infrared switching film is used to achieve infrared confocal The design has limitations and unreliability in application; with infrared design in mind, the blue-purple difference in visible light is generally large, and the focus shift is large. In actual use, blue-purple fringes are prone to appear on the edge of light and dark contrast, which affects algorithm recognition; through light The aperture is generally small, and the relative illuminance value of the imaging edge is low, etc., which can no longer meet the increasing requirements, and urgently need to be improved

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