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Infrared lens, imaging module and temperature measuring instrument

A technology of infrared lens and imaging surface, which is applied in the field of optical imaging, can solve the problems of unfavorable promotion and use of non-contact temperature measuring instruments, increase the production cost of non-contact temperature measuring instruments, and high overall cost of infrared lenses, and achieve favorable Promote the use, realize miniaturization design, and solve the effect of distortion of vision

Inactive Publication Date: 2021-06-04
NANCHANG O FILM OPTICAL ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the lens used in the infrared lens is relatively expensive due to limitations in materials, processing techniques, etc., and most of the current infrared lenses use two or more lenses, which makes the overall cost of the infrared lens It is relatively high, which further increases the production cost of non-contact temperature measuring instruments, which is not conducive to the popularization and use of non-contact temperature measuring instruments

Method used

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  • Infrared lens, imaging module and temperature measuring instrument
  • Infrared lens, imaging module and temperature measuring instrument
  • Infrared lens, imaging module and temperature measuring instrument

Examples

Experimental program
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Embodiment 1

[0077] For a schematic structural diagram of the infrared lens 100 of the embodiment of the present application, see figure 1 , the infrared lens 100 includes a lens 110 with a positive focal length, and the object side and the image side of the lens 110 are both aspherical.

[0078] In the embodiment of the present application, the relevant parameters of the lens 110 are shown in Table 1 and Table 2, wherein, Table 2 is the aspherical coefficient of the surface of the lens 110 in Table 1, wherein k is the conic coefficient, and a i is the coefficient corresponding to the i-th high-order term in the aspheric surface formula. In Table 1, the surface numbers 1 and 2 correspond to the object side S1 and the image side S2 of the lens 110 respectively, and the image surface (imaging surface S3) can be understood as the photosensitive surface of the photosensitive element when it is assembled with the photosensitive element in the later stage. The lens 110 is located in " The first...

Embodiment 2

[0085] For a schematic structural diagram of the infrared lens 100 of the embodiment of the present application, see image 3 , the infrared lens 100 includes a lens 110 with a positive focal length, and the object side and the image side of the lens 110 are both aspherical.

[0086] In the embodiment of the present application, the relevant parameters of the lens 110 are shown in Table 3 and Table 4, wherein, Table 4 is the aspheric coefficient of the surface of the lens 110 in Table 3, wherein k is the conic coefficient, and a iis the coefficient corresponding to the i-th high-order term in the aspheric surface formula. In Table 3, the surface numbers 1 and 2 correspond to the object side S1 and the image side S2 of the lens 110 respectively. The image surface (imaging surface S3S11) can be understood as the photosensitive surface of the photosensitive element when it is assembled with the photosensitive element in the later stage. The lens 110 is located in " The first val...

Embodiment 3

[0093] For a schematic structural diagram of the infrared lens 100 of the embodiment of the present application, see Figure 5 , the infrared lens 100 includes a lens 110 with a positive focal length, and the object side and the image side of the lens 110 are both aspherical.

[0094] In the embodiment of the present application, the relevant parameters of the lens 110 are shown in Table 5 and Table 6, wherein, Table 6 is the aspheric coefficient of the surface of the lens 110 in Table 5, wherein k is the conic coefficient, and a i is the coefficient corresponding to the i-th high-order term in the aspheric surface formula. In Table 5, the surface numbers 1 and 2 correspond to the object side S1 and the image side S2 of the lens 110 respectively, and the image surface (imaging surface S3S11) can be understood as the photosensitive surface of the photosensitive element when it is assembled with the photosensitive element in the later stage. The lens 110 is located in " The fir...

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Abstract

The embodiment of the invention discloses an infrared lens, an imaging module and a temperature measuring instrument. The infrared lens comprises a lens with a positive focal length, the object side surface and the image side surface of the lens are aspheric surfaces, and the infrared lens meets the following conditional expressions 0.2< FL / TTL<0.3, FL represents the effective focal length of the infrared lens, and TTL represents the distance from the object side surface of the lens to the imaging surface of the infrared lens on the optical axis. The infrared lens provided by the embodiment of the invention is particularly suitable for a non-contact temperature measuring instrument, and the main purpose of the non-contact temperature measuring instrument is to detect the body temperature of a pedestrian, so that a relatively high requirement on the imaging definition degree is not required, and the use requirement can be met through the single lens. The manufacturing cost of the infrared lens can be remarkably reduced, so that the overall production cost of the non-contact temperature measuring instrument can be reduced, and popularization and application of the non-contact temperature measuring instrument are facilitated.

Description

technical field [0001] The present application relates to the technical field of optical imaging, in particular to an infrared lens, an imaging module and a temperature measuring instrument. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] Non-contact temperature measuring instruments are widely used in airports, high-speed rail and other places because of their advantages in high temperature measurement efficiency. The thermal imaging lens used in the non-contact temperature measuring instrument is an infrared lens for receiving infrared rays in the 7-14 μm band. Usually, the lens used in the infrared lens is relatively expensive due to limitations in materials, processing techniques, etc., and most of the current infrared lenses use two or more lenses, which makes the overall cost of the infrared lens It is relatively high, which further increases the production co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/02G02B1/00G02B27/00G01K13/00G01J5/00
CPCG02B3/02G02B1/00G02B27/0012G01J5/00G01J5/0025G01J2005/0077
Inventor 文逸春
Owner NANCHANG O FILM OPTICAL ELECTRONICS TECH CO LTD