CN209182570U - A kind of economical LONG WAVE INFRARED boiler camera lens - Google Patents

A kind of economical LONG WAVE INFRARED boiler camera lens Download PDF

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Publication number
CN209182570U
CN209182570U CN201821510255.2U CN201821510255U CN209182570U CN 209182570 U CN209182570 U CN 209182570U CN 201821510255 U CN201821510255 U CN 201821510255U CN 209182570 U CN209182570 U CN 209182570U
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China
Prior art keywords
lens
camera lens
long wave
wave infrared
aspherical
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CN201821510255.2U
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Chinese (zh)
Inventor
雷季东
王胜龙
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Hebei Lansitek Optoelectronic Technology Co ltd
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Sanhe Lanstech Optoelectronics Science & Technology Co Ltd
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Abstract

The utility model discloses a kind of economical LONG WAVE INFRARED boiler camera lenses, successively have three lens cluster from object space to image space, comprising: the first lens with positive light coke are falcate germanium single crystal positive lens of a piece of convex surface towards image space；The second lens with positive light coke are falcate germanium single crystal positive lens of a piece of convex surface towards image space；The third lens with positive light coke are falcate germanium single crystal positive lens of a piece of convex surface towards object space.The utility model can well be imaged in boiler environment, while F number is 1.8, focal length 5.5mm, is suitable for 640x480,17 μm of Pixel size of long wave uncooled detector；It is small in size compared to same type camera lens, it is light-weight, it is more economical practical.

Description

A kind of economical LONG WAVE INFRARED boiler camera lens
Technical field
The utility model belongs to optical technical field, is related to a kind of economical length for LWIR Uncooled detector Wave infrared boiler camera lens.
Background technique
With reaching its maturity for infrared technique, infrared optical lens are increasingly drawn close to visible light lens field, commonly It is not able to satisfy the demand of more occasions, is needed when monitoring real-time condition in boiler using boiler camera lens.Boiler camera lens can Imaging clearly in furnace high-temperature temperature range is adapted to, will not be influenced by environment temperature.Boiler camera lens probe uses pin hole, water cooling Atmoseal structure more stable can work compared to common lens in furnace.Therefore light-weight there is an urgent need to a kind of small in size Boiler camera lens.This camera lens can guarantee that image quality is good in operating temperature range, while aperture is kept constant, and is mounted on pot Furnace furnace roof, it is easy to install and use.Same type camera lens the utility model is practical relatively reduces eyeglass bore, and visual field is bigger, and cost is more It is cheap.
Utility model content
The utility model provides a kind of economical LONG WAVE INFRARED boiler camera lens, and technical problems to be solved are to provide one kind It can be used in high-temperature boiler, the total length of optics is small in size, and easy to carry, adjustment is convenient, the high boiler mirror of image quality Head.Its service band is 8~12 microns, number=1.8 focal length 5.5mm, F, and adaptation resolution ratio is 640x480, Pixel size 17 The uncooled detector of micron, optical system overall length 99.716mm, maximum caliber 32mm.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of economical LONG WAVE INFRARED boiler camera lens successively includes the first lens, the second lens, by object space to image space Three lens and explorer portion；
First lens have positive light coke, are falcate germanium single crystal positive lens of a piece of convex surface towards image space, court It is aspherical to the one side of object space；
Second lens have positive light coke, are falcate germanium single crystal positive lens of a piece of convex surface towards image space, court It is aspherical to the side of image space；
The third lens have positive light coke, are falcate germanium single crystal positive lens of a piece of convex surface towards object space, court It is aspherical to the side of image space；
It is long wave uncooled detector part, including protecting window and image planes, aperture diaphragm position after the third lens In the rear surface of the third lens.
The camera lens meets following parameter:
Number=1.8 effective focal length EFL=5.5mm, F of the camera lens, optical system overall length=99.716mm, adaptation detection Device resolution ratio 640x480,17 μm of Pixel size.
The horizontal field of view angular region of the camera lens are as follows: 2w=89.4 °.
Aspherical in the eyeglass of the camera lens meets following expression formula:
Wherein z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise, c is indicated The vertex curvature on surface, k are circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
The utility model has the following beneficial effects: can well be imaged in high-temperature boiler, optical system overall length is 99.716mm, maximum caliber 32mm, it is compact-sized.System has only used three pieces eyeglass, keeps system more stable.Simultaneously using refraction Formula optical texture, adjustment is easy, is easy to volume production.The@of average MTF > 0.49 20lp/mm of full filed.
Detailed description of the invention
Fig. 1 is the optical system diagram of economical LONG WAVE INFRARED boiler camera lens provided by the utility model；
Fig. 2 is the point range figure of economical LONG WAVE INFRARED boiler camera lens provided by the utility model；
Fig. 3 is optical transfer function figure (the cut-off resolution of economical LONG WAVE INFRARED boiler camera lens provided by the utility model Rate is 20lp/mm)；
Fig. 4 is the curvature of field distortion figure of economical LONG WAVE INFRARED boiler camera lens provided by the utility model；
Wherein, 100- object space, the first lens of L1-, the second lens of L2-, L3- the third lens, 101- detector protect window Mouthful, 102- image planes, S1~S6 is each surface of lens.
Specific embodiment
Below in conjunction with attached drawing, the utility model is described in further details by embodiment.
The embodiment is that the utility model is stared applied to 17 μm of 640 × 480 pixel dimension of long wave non-refrigeration type resolution ratio The example of formed coke planar detector.
Fig. 1 is the optical system diagram of the utility model.
As shown in Figure 1, the utility model apply by the first lens L1 of positive light coke, positive light coke the second lens L2, The third lens L3 of positive light coke and last detector 101,102 composition.The two sides of first lens L1 be S1 and S2, second The two sides of lens L2 is S3 and S4, and the two sides of the third lens L3 is S5 and S6.
L1 i.e. the first lens are positive lens of the convex surface towards image space, and material is germanium single crystal, and S1 is aspherical；L2 i.e. second Lens are positive lens of the convex surface towards image planes, and material is germanium single crystal, and the surface S4 is aspherical；L3, that is, the third lens is convex surface court To the positive lens of object space, material is germanium single crystal, and the surface S6 is aspherical；Long wave uncooled detector includes: protecting window 101, imaging surface 102, resolution ratio 640x480,17 μm of 17 μ m of Pixel size.
In the above three pieces lens, S1 plates hard carbon film, and S2~S6 plates anti-reflection film to guarantee its transmitance.
Table 1 is the Optic structure parameter of the utility model:
Table 1
Surface Radius of curvature Thickness (interval) Material Bore
S1 -11.283 6.8 GE_LONG 10.2
S2 -11.13 23.643 19
S3 -162.73 4.5 GE_LONG 28.8
S4 -49.266 41.844 32
S5 27.678 2.5 GE_LONG 14
S6 59.497 18.059 11.6
It refers to aspherical in the above three pieces lens, is even aspheric surface, expression formula is as follows
Wherein z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise, c is indicated The vertex curvature on surface, k are circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
Table 2 be surface S1, the asphericity coefficient of S4, S6:
Table 2
Surface 4th 6th 8th
S1 -2.285E-4 6.408E-7 -4.859E-8
S4 2.272E-6 1.434E-8 -5.856E-11
S6 7.868E-6 -4.398E-8 5.793E-10
Further detailed description is done referring to effect of the Aberration Analysis figure to the utility model.
Fig. 2-Fig. 4 is the Aberration Analysis figure of the specific example of economical LONG WAVE INFRARED boiler camera lens described in Fig. 1, and Fig. 2 is Point range figure, Fig. 3 are that MTF schemes, Fig. 4 is curvature of field distortion figure.
It can be found that various aberrations have obtained good correction from figure, disc of confusion is corrected to close to Aili spot size, MTF is close to diffraction limit.
Number=1.8 effective focal length EFL=5.5mm, F of the camera lens, optical system overall length=99.716mm, adaptation detection Device resolution ratio 640x480,17 μm of Pixel size.The horizontal field of view angular region of the camera lens are as follows: 2w=89.4 °.
It can be seen that the economical LONG WAVE INFRARED boiler camera lens of the utility model is in temperature range with good at image quality Amount.
Finally, it should be noted that above embodiments are only to illustrate the utility model and not limit the utility model and retouched The technical solution stated.Therefore, although this specification has been carried out detailed description to the utility model referring to the above embodiments, But those skilled in the art should understand that, it still can modify to the utility model or equivalent replacement；And one The technical solution and its improvement for cutting the spirit and scope for not departing from the utility model, should all cover the right in the utility model In claimed range.

Claims (4)

1. a kind of economical LONG WAVE INFRARED boiler camera lens, it is characterised in that: by object space to image space successively include the first lens, second Lens, the third lens and explorer portion；
First lens have positive light coke, are falcate germanium single crystal positive lens of a piece of convex surface towards image space, towards object The one side of side is aspherical；
Second lens have positive light coke, are falcate germanium single crystal positive lens of a piece of convex surface towards image space, towards picture The side of side is aspherical；
The third lens have positive light coke, are falcate germanium single crystal positive lens of a piece of convex surface towards object space, towards picture The side of side is aspherical；
It is long wave uncooled detector part after the third lens, including protecting window and image planes, aperture diaphragm are located at the Three lens rear surfaces；
The horizontal field of view angular region of camera lens are as follows: 2w=89.4 °.
2. economical LONG WAVE INFRARED boiler camera lens according to claim 1, which is characterized in that the camera lens meets following ginseng Number:
Number=1.8 effective focal length EFL=5.5mm, F of the camera lens, optical system overall length=99.716mm, adaptation detector point Resolution 640x480,17 μm of Pixel size.
3. economical LONG WAVE INFRARED boiler camera lens according to claim 1, which is characterized in that in the eyeglass of the camera lens It is aspherical to meet following expression formula:
Wherein z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise, c indicates surface Vertex curvature, k is circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
4. economical LONG WAVE INFRARED boiler camera lens according to claim 1, which is characterized in that the full filed of the camera lens The average@of MTF > 0.49 20lp/mm.
CN201821510255.2U 2018-09-14 2018-09-14 A kind of economical LONG WAVE INFRARED boiler camera lens Active CN209182570U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115097599A (en) * 2022-06-17 2022-09-23 安徽光智科技有限公司 Wide-angle infrared lens for boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115097599A (en) * 2022-06-17 2022-09-23 安徽光智科技有限公司 Wide-angle infrared lens for boiler

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GR01 Patent grant
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PE01 Entry into force of the registration of the contract for pledge of patent right
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Denomination of utility model: Economical long-wave infrared boiler lens

Effective date of registration: 20200410

Granted publication date: 20190730

Pledgee: Bank of China Limited Yanjiao branch

Pledgor: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY Co.,Ltd.

Registration number: Y2020990000304

PC01 Cancellation of the registration of the contract for pledge of patent right
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Date of cancellation: 20210323

Granted publication date: 20190730

Pledgee: Bank of China Limited Yanjiao branch

Pledgor: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY Co.,Ltd.

Registration number: Y2020990000304

PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: An economical long wave infrared boiler lens

Effective date of registration: 20210323

Granted publication date: 20190730

Pledgee: Bank of China Limited Yanjiao branch

Pledgor: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY Co.,Ltd.

Registration number: Y2021990000246

PC01 Cancellation of the registration of the contract for pledge of patent right
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Date of cancellation: 20220617

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Pledgee: Bank of China Limited Yanjiao branch

Pledgor: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY CO.,LTD.

Registration number: Y2021990000246

PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: An economical long wave infrared boiler lens

Effective date of registration: 20220617

Granted publication date: 20190730

Pledgee: Bank of China Limited Yanjiao branch

Pledgor: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY CO.,LTD.

Registration number: Y2022990000337

PC01 Cancellation of the registration of the contract for pledge of patent right
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Date of cancellation: 20230323

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Pledgee: Bank of China Limited Yanjiao branch

Pledgor: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY CO.,LTD.

Registration number: Y2022990000337

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CU01 Correction of utility model

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Correct: Bank of China Limited Yanjiao Branch

False: Bank of China Limited Yanjiao Branch

Number: 15-02

Volume: 39

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Denomination of utility model: An economical long wave infrared boiler lens

Effective date of registration: 20230329

Granted publication date: 20190730

Pledgee: Bank of China Limited Yanjiao Branch

Pledgor: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY CO.,LTD.

Registration number: Y2023990000179

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CP03 Change of name, title or address

Address after: 065201 Factory Building L03-G, Baishi Jingu Yanjiao International Industrial Base, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province

Patentee after: Hebei Lansitek Optoelectronic Technology Co.,Ltd.

Country or region after: China

Address before: 065201 Factory Building L03-G, Baishi Jingu Yanjiao International Industrial Base, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province

Patentee before: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY CO.,LTD.

Country or region before: China