Optical imaging lens

An optical imaging lens and lens technology, applied in the lens field, can solve the problems of poor communication control, low relative illumination, low resolution, etc., and achieve the effects of good color reproduction, small field of view chromatic aberration, and high resolution

Pending Publication Date: 2020-04-24
XIAMEN LEADING OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Such as figure 1 As shown, an optical imaging lens includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a light Diaphragm 140, sixth lens 6, seventh lens 7, eighth lens 8, ninth lens 9, tenth lens 100, eleventh lens 110, twelfth lens 120, thirteenth lens 130, protective sheet 150 and The imaging surface 160 ; the first lens 1 to the thirteenth lens 130 each include an object side facing the object side A1 through which the imaging light passes and an image side facing the image side A2 through which the imaging light passes.

[0105] The first lens 1 has a positive refractive power, the object side 11 of the first lens 1 is a convex surface, and the image side 12 of the first lens 1 is a plane. Of course, in some embodiments, the image of the first lens 1 The sides 12 may also be concave or convex.

[0106] The second lens 2 has a negative refractive power, the object side 21 of the second lens 2 is convex, and the image side 22 o...

Embodiment 2

[0128] The concave-convex and refractive power of each lens in this embodiment and the first embodiment are roughly the same, only the image side 12 of the first lens 1 is concave, and the optical parameters such as radius of curvature and lens thickness of each lens surface are also different.

[0129] The detailed optical data of this specific embodiment are shown in Table 2-1.

[0130] Detailed optical data of Table 2-1 Example 2

[0131]

[0132]

[0133] Please refer to the numerical values ​​of the relevant conditional expressions of this specific embodiment Figure 32 .

[0134] For the resolution of this specific embodiment, please refer to Figure 8-10 , it can be seen from the figure that the control of the transmission is good, the resolution is high, the resolution of the full field of view can reach 200lp / mm, and it can support 20 million pixels, and the high and low temperature is almost not out of focus; the relative illumination figure is as follows F...

Embodiment 3

[0137] The concave-convex and refractive power of each lens in this embodiment and the first embodiment are roughly the same, only the image side 72 of the seventh lens 7 is flat. In addition, the optical parameters such as radius of curvature and lens thickness of each lens surface are also different.

[0138] The detailed optical data of this specific embodiment are shown in Table 3-1.

[0139] Detailed optical data of the third embodiment of table 3-1

[0140]

[0141]

[0142] Please refer to the numerical values ​​of the relevant conditional expressions of this specific embodiment Figure 32 .

[0143] For the resolution of this specific embodiment, please refer to Figure 14-16 , it can be seen from the figure that the control of the transmission is good, the resolution is high, the resolution of the full field of view can reach 200lp / mm, and it can support 20 million pixels, and the high and low temperature is almost not out of focus; the relative illumination f...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B7/02
CPCG02B7/028G02B13/0015
Inventor 曹来书李雪慧
Owner XIAMEN LEADING OPTICS
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