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An infrared lens for 3D measurement

An infrared lens and lens technology, which is applied in the field of 3D measurement, can solve the problems of miniaturization, long length and large size of unfavorable 3D measurement equipment, and achieve the effect of reducing the volume, shortening the size and reducing the volume.

Active Publication Date: 2020-08-21
NANJING HUAJIE IMI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional external lens for 3D measurement has a long length and a large size, which is very unfavorable for the miniaturization of 3D measurement equipment

Method used

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  • An infrared lens for 3D measurement
  • An infrared lens for 3D measurement
  • An infrared lens for 3D measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The infrared lens 100 with the structure of this embodiment satisfies the following relationship:

[0082] f1>0, f20, f5<0, f25<0; (1)

[0083] -1

[0084] Wherein, in the above formula (1) and formula (2), f1 is the focal length of the first lens 110, f2 is the focal length of the second lens 120, f3 is the focal length of the third lens 130, and f4 is the focal length of the third lens 130. The focal length of the fourth lens 140 , f5 is the focal length of the fifth lens 150 , and f25 is the combined focal length of the second lens 120 to the fifth lens 150 .

[0085] Preferably, the infrared lens 100 satisfies the following relationship:

[0086] 0.5

[0087] -2.7

[0088] -150

[0089] 3.5

[0090] -2.5

[0091] Wherein, in the above formula (3) to formula (7), f is the system focal length of the infrared lens 100 .

[0092] A specific example is given in Table 1 below:

...

Embodiment 2

[0107] The infrared lens 100 with the structure of this embodiment satisfies the following relationship:

[0108] f1>0, f2>0, f3>0, f4>0, f50; (9)

[0109] 0.15

[0110] Wherein, in the above formula (9) and formula (10), f1 is the focal length of the first lens 110, f2 is the focal length of the second lens 120, f3 is the focal length of the third lens 130, and f4 is the focal length of the third lens 130. The focal length of the fourth lens 140 , f5 is the focal length of the fifth lens 150 , and f25 is the combined focal length of the second lens 120 to the fifth lens 150 .

[0111] Preferably, the above-mentioned infrared lens 100 also satisfies the following relational expression:

[0112] 1

[0113] 3.7

[0114] 13

[0115] 5

[0116] -3

[0117] Wherein, in the above formula (11) to formula (15), f is the system focal length of the infrared lens 100 .

[0118] A specif...

Embodiment 3

[0130] The infrared lens 100 with the structure of this embodiment satisfies the following relationship:

[0131] f1>0, f2>0, f30, f5<0, f25<0; (16)

[0132] -0.65

[0133] Wherein, in the above formula (16) and formula (17), f1 is the focal length of the first lens 110, f2 is the focal length of the second lens 120, f3 is the focal length of the third lens 130, and f4 is the focal length of the third lens 130. The focal length of the fourth lens 140 , f5 is the focal length of the fifth lens 150 , and f25 is the combined focal length of the second lens 120 to the fifth lens 150 .

[0134] Preferably, the infrared lens 100 with the structure of this embodiment also satisfies the following relational expression:

[0135] 1

[0136] 8

[0137] -28

[0138] 1

[0139] -1

[0140] Wherein, in the above formula (18) to formula (22), f is the system focal length of the infrared len...

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Abstract

The invention discloses an infrared lens for 3D measurement. The infrared lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object space to an image space along an optical axis, wherein the convex sides of the first lens and the second lens both face the object space; the convex sides of the third lens, the fourth lens and the fifth lens all face the image space; the focal lengths of the first lens, the second lens, the third lens, the fourth lens and the fifth lens have a preset relationship with a system focal length of the infrared lens, so as to shorten the size of the infrared lens. Therefore, the size of the infrared lens disclosed by the invention can be shortened remarkably, the size of the infrared lens is reduced, the size of 3D measurement equipment using the infrared lens can be reduced, and the application range of the 3D measurement equipment can be expanded.

Description

technical field [0001] The invention relates to the technical field of 3D measurement, in particular to an infrared lens for 3D measurement. Background technique [0002] In general, current 3D measurement equipment is more and more applied to computers, mobile phones, TVs, robots, medical equipment and other products for in-depth image capture, such as face recognition, gesture recognition, and spatial positioning. [0003] In order to meet these demanding product applications, the volume of 3D measurement equipment is required to be smaller and smaller. [0004] However, the traditional external lens for 3D measurement has a long length and a large size, which is very unfavorable for the miniaturization of the 3D measurement device. [0005] Therefore, how to design a miniaturized infrared lens for 3D measurement has become an urgent technical problem in this field. Contents of the invention [0006] The present invention aims to solve at least one of the technical pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/14
CPCG02B13/0045G02B13/14
Inventor 周晓军王行盛赞李朔李骊杨高峰
Owner NANJING HUAJIE IMI TECH CO LTD