CN205720847U - A kind of 1.3～5um broadband infrared imaging camera lenses - Google Patents
A kind of 1.3～5um broadband infrared imaging camera lenses Download PDFInfo
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- CN205720847U CN205720847U CN201620646442.8U CN201620646442U CN205720847U CN 205720847 U CN205720847 U CN 205720847U CN 201620646442 U CN201620646442 U CN 201620646442U CN 205720847 U CN205720847 U CN 205720847U
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- infrared imaging
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Abstract
The utility model discloses a kind of 1.3～5um broadband infrared imaging camera lenses, including the first reflecting mirror and the second reflecting mirror, principal goods mirror, the first frontal lens, the second frontal lens and focusing lens it is disposed with on the optical axis of the first reflecting mirror incident illumination, it is disposed with the first rear lens and the second rear lens on optical axis between two reflecting mirrors, the optical axis of the second reflecting mirror emergent light is provided with the 3rd rear lens；Described principal goods mirror is the positive light coke planoconvex lens convex surface facing thing side, the described biconcave lens that the first frontal lens is negative power, the second described frontal lens and the 3rd rear lens are the biconvex lens of positive light coke, described focusing lens and the first rear lens are the positive light coke meniscus lens convex surface facing the first reflecting mirror, and the second described rear lens is the negative power meniscus lens convex surface facing the second reflecting mirror；This utility model image quality is higher, substantially reduces system aberration, and makes system aberration in wide spectral range be corrected.
Description
Technical field
This utility model belongs to infrared imagery technique field, is specifically related to a kind of 1.3～5um broadband infrared imaging mirrors
Head, is useful in fields such as marine oil overflow monitoring, monitoring harmful gases, various Target Infrared Radiation characteristic research.
Background technology
In recent years, infrared spectrometer becomes scientific research and analyzes the research emphasis direction of detection.Field level multiband
Infrared Imaging Spectrometer is detection and the analytical equipment of a new generation, has the characteristic of " collection of illustrative plates unification ", combines conventional spectrometers
With the feature of photoelectric imaging technology, two-dimensional image spatial information and high-resolution spectral information can be provided, it is achieved to mesh simultaneously
The detection of mark scene and depth analysis.
It is universal that it has comprehensive imaging analysis ability, higher spectral resolution and good platform, at ocean ring
The fields such as border monitoring, air pollution detection, national defence research, public safety all have a wide range of applications value.
Preposition infrared optical system is the important component part of field level multiband Infrared Imaging Spectrometer, its Main Function
For extraneous scenery target being projected on interferometer by broadband high-resolution infrared lens.
Wide broadband radiation system has system aberration and aberration is difficult to the design difficulties such as correction.At present, Canada ABB is only had
Bomem company and Telops company of Canada have been reported that out that spectral region, at the imaging lens of 1.3～5um, domestic is not yet reported
Cross the broadband infrared imaging camera lens of this kind 1.3～5um broadband (shortwave, medium wave).
Utility model content
The purpose of this utility model is according to the deficiencies in the prior art, a kind of 1.3～5nm broadband infrared imagings of design
Camera lens, it is possible to and the coupling use of 320 × 256 broadband refrigeration mode area array infrared detectors, systematical distortion is little, it is possible to meets height and becomes
The demand of picture element amount.
This utility model solves its technical problem and be the technical scheme is that a kind of 1.3～5um broadband infrared imagings
Camera lens, including the first reflecting mirror being oppositely arranged in 90 ° and the second reflecting mirror；Depend on the optical axis of described first reflecting mirror incident illumination
Secondary it is provided with principal goods mirror, the first frontal lens, the second frontal lens and focusing lens, between the first reflecting mirror and the second reflecting mirror, reflects light
Optical axis on be disposed with the first rear lens and the second rear lens, the optical axis of described second reflecting mirror emergent light is provided with
Three rear lenses；Described principal goods mirror is the positive light coke planoconvex lens convex surface facing thing side, and the first described frontal lens is negative light
The biconcave lens of focal power, the second described frontal lens and the 3rd rear lens are the biconvex lens of positive light coke, described focusing lens
Being the positive light coke meniscus lens convex surface facing the first reflecting mirror with the first rear lens, the second described rear lens is convex surface court
To the negative power meniscus lens of the second reflecting mirror.
Described one 1.3～5um broadband infrared imaging camera lens, the front surface of its second frontal lens is based on aspheric surface
The diffraction surfaces of substrate.
Described one 1.3～5um broadband infrared imaging camera lens, the front surface of its focusing lens is aspheric surface.
Described one 1.3～5um broadband infrared imaging camera lens, the rear surface of its first rear lens is aspheric surface.
Described one 1.3～5um broadband infrared imaging camera lens, its lens material is monocrystal silicon or zinc selenide.
Described one 1.3～5um broadband infrared imaging camera lens, its principal goods mirror, the first frontal lens, focusing lens, second
Rear lens and the 3rd rear lens are monocrystal silicon lens.
Described one 1.3～5um broadband infrared imaging camera lens, its second frontal lens and the first rear lens are zinc selenide
Lens.
The beneficial effects of the utility model are: use the physical characteristic of diffraction element, only used common infra-red material
(monocrystal silicon and zinc selenide), by optimizing the face shape parameter on each surface and suitable employing aspheric surface and diffraction surfaces, just achieves
System high-quality imaging in the range of 1.3～5um broadbands (shortwave, medium wave), substantially reduces system aberration, and make be
System aberration in wide spectral range is corrected；Processing meets the technology requirement of normal diamond lathe turning, reduces life
Produce cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is optical schematic diagram of the present utility model；
Fig. 3 is the curvature of field of the present utility model and distortion curve figure；
Fig. 4 is this utility model transfer curve figure when 16mm/lp, and abscissa is the demand pairs of every millimeter, vertical seat
It is designated as contrast numerical value；
Fig. 5 is system disc of confusion figure of the present utility model.
Each reference is: 1 principal goods mirror, 2 first frontal lens, 3 second frontal lens, 4 focusing lenses, 5 first
Reflecting mirror, 6 first rear lenses, 7 second rear lenses, 8 second reflecting mirrors, 9 the 3rd rear lenses.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail.
In order to provide a preposition broadband imaging optical system to field level multiband Infrared Imaging Spectrometer, with reference to figure
1, shown in Fig. 2, the utility model discloses a kind of 1.3～5um broadband infrared imaging camera lenses, as basic embodiment, be
System focal length be 85mm, the F number ratio of clear aperature (system focal with) be 2, it includes in 90 ° of first reflecting mirrors being oppositely arranged
5 and second reflecting mirror 8, incident illumination reflects to form after being reflected to the second reflecting mirror 8 after arriving the first reflecting mirror 5 again with incident
Parallel light and emergent light in opposite direction；It is disposed with principal goods mirror 1, first on the optical axis of described first reflecting mirror 5 incident illumination
Frontal lens the 2, second frontal lens 3 and focusing lens 4, reflect between the first reflecting mirror 5 and the second reflecting mirror 8 and set successively on the optical axis of light
It is equipped with the first rear lens 6 and the second rear lens 7, the optical axis of described second reflecting mirror 8 emergent light is provided with the 3rd rear lens 9；
Described principal goods mirror 1 is the positive light coke planoconvex lens convex surface facing thing side, and the first described frontal lens 2 is the double of negative power
Concavees lens, the second described frontal lens 3 and the 3rd rear lens 9 are the biconvex lens of positive light coke, described focusing lens 4 and first
Rear lens 6 is the positive light coke meniscus lens convex surface facing the first reflecting mirror 5, the second described rear lens 7 be convex surface facing
The negative power meniscus lens of the second reflecting mirror 8.
As further embodiment, the front surface of the second described frontal lens 3 is diffraction surfaces based on aspheric substrate；
The front surface of described focusing lens 4 is aspheric surface；The rear surface of the first described rear lens 6 is aspheric surface.
As further embodiment, described principal goods mirror the 1, first frontal lens 2, focusing lens the 4, second rear lens 7 and
3rd rear lens 9 is monocrystal silicon lens；The second described frontal lens 3 and the first rear lens 6 are zinc selenide lens.
Under list the specific embodiment of 1.3～5um broadband infrared imaging camera lenses in this utility model.
In upper table, radius of curvature refers to the radius of curvature on each surface, and spacing refers to the distance between adjacent two surfaces,
For example, the distance between the spacing of surface S1, i.e. surface S1 to surface S2.Glass material is used by the fabrication and processing of these lens
Material.Wherein the front surface S 5 of the second frontal lens 3 is zinc selenide diffraction surfaces based on aspheric substrate, the front table of focusing lens 4
Face S7 is the high order aspheric surface in monocrystal silicon substrate, and the rear surface S11 of rear lens 6 is zinc selenide suprabasil high order aspheric
Face.
Specifically, the radius of curvature of the front surface of described principal goods mirror 1 is 76.56mm, the forward and backward surface of principal goods mirror 1
Between spacing be 9mm；The radius of curvature of the front surface of the first described frontal lens 2 is respectively-962.4mm, the first frontal lens 2
The spacing of rear surface of front surface and principal goods mirror 1 be 2mm, the radius of curvature of the rear surface of the first frontal lens 2 is 82.4mm, the
Spacing between the forward and backward surface of one frontal lens 2 is 5mm；The radius of curvature of the front surface of the second described frontal lens 3 is
324.4mm, the spacing of the front surface of the second frontal lens 3 and the rear surface of the first frontal lens 2 is 7.5mm, after the second frontal lens 3
The radius of curvature on surface is-108.5mm, and the spacing between the forward and backward surface of the second frontal lens 3 is 7mm；Described focusing lens 4
The radius of curvature of front surface be-38.99mm, the spacing of the front surface of focusing lens 4 and the rear surface of the second frontal lens 3 is
135mm, the radius of curvature of the rear surface of focusing lens 4 is-40.5mm, and the spacing between the forward and backward surface of focusing lens 4 is 6mm；Institute
The spacing of the front surface of the first reflecting mirror 5 stated and the rear surface of focusing lens 4 is 20mm, the forward and backward surface of the first reflecting mirror 5 it
Between spacing be 7mm；The radius of curvature of the front surface of the first described rear lens 6 is 75.16mm, the rear table of the first rear lens 6
The radius of curvature in face is 46.95mm, and the spacing of the front surface of the first rear lens 6 and the front surface of the first reflecting mirror 5 is 50mm, the
Spacing between the forward and backward surface of one rear lens 6 is 5mm；The radius of curvature of the front surface of the second described rear lens 7 is-
33.98 mm, the radius of curvature of the rear surface of the second rear lens 7 is-27.54mm, after the front surface and first of the second rear lens 7
The spacing of the rear surface of lens 6 is 8mm, and the spacing between the forward and backward surface of the second rear lens 7 is 5mm；The second described reflection
The spacing of the front surface of mirror 8 and the rear surface of the second rear lens 7 is 22mm, the spacing between the forward and backward surface of the second reflecting mirror 8
For 7mm；The radius of curvature of the front surface of the 3rd described rear lens 9 is 81.2mm, the curvature of the rear surface of the 3rd rear lens 9 half
Footpath is-473.55mm, and the spacing of the front surface of the 3rd rear lens 9 and the front surface of the second reflecting mirror 8 is 22mm, the 3rd rear lens
Spacing between the forward and backward surface of 9 is 4mm, and the spacing between rear surface and the system image planes of the 3rd described rear lens 9 is
9mm。
Following table lists the rear surface of front surface S 7, first rear lens 6 of the front surface S 5 of the second frontal lens 3, focusing lens 4
The asphericity coefficient of S11.
The position change of aspheric surface optical axis direction on the basis of vertex of surface is defined as follows:
Wherein, each meaning of parameters is:
The position of Z optical axis direction becomes, the height of H optical axis, c lens curvature, K quadratic surface coefficient, A, B, C asphericity coefficient.
Following table lists the diffraction surfaces coefficient of the second frontal lens 3 front surface S 5.
The phase equation of the diffraction surfaces used is as follows:
Wherein, each meaning of parameters is:Diffraction surfaces phase function,Structure centre wavelength,Vertical optical axis
The radial coordinate in direction,、Diffraction coefficient.
The service band of this utility model infrared lens is 1.3～5um, and F number is 2；System stop is positioned at refrigeration detector
Cold stop on, meet system 100% cold stop efficiency.
This utility model uses the design of secondary imaging type, reduces each group of aperture of lens, and the most Polaroid face is positioned at the
Between one reflecting mirror 5 and the first rear lens 6, secondary imaging face is positioned at system image planes.
This utility model eliminates spherical aberration and high order aberration by aspheric surface and diffraction surfaces, improves system transter, protects
System of holding has preferable image quality at 16lp/mm, and rationally, residual aberration is less, imaging in the focal power distribution of each battery of lens
Quality is good, and systematical distortion is little, and 320 × 256 medium wave refrigerated infrared detectors can be coordinated to use, for wide-band spectrum analysis
Imaging.Lens material all selects common infrared glass to design, and utilizes aspheric surface and diffraction surfaces to correct system aberration and aberration, and
High order aspheric surface and diffraction surfaces are arranged on the glass material beneficially processed, and can carry out milling, polishing by Digit Control Machine Tool, obtain
Obtain preferable piece surface, have employed a silicon aspheric surface, zinc selenide aspheric surface, a selenizing based on aspheric substrate
Zinc diffraction surfaces, beneficially raising system picture element, there is preferable processing technology in conjunction with the most ripe intelligence polishing Digit Control Machine Tool,
It is suitable for batch production.
Fig. 3 to Fig. 5 is optical simulation datagram of the present utility model.Light of the present utility model is can be seen that from Fig. 3 to Fig. 5
Learn transmission function, the curvature of field, distort and put disc of confusion root-mean-square diameter all in critical field.As can be seen here, this utility model
There is preferable image quality.
Above-described embodiment only illustrative principle of the present utility model and effect thereof, and the embodiment that part is used,
For the person of ordinary skill of the art, on the premise of creating design without departing from this utility model, it is also possible to if making
Dry deformation and improvement, these broadly fall into protection domain of the present utility model.
Claims (8)
1. one kind 1.3～5um broadband infrared imaging camera lens, it is characterised in that: include the first reflecting mirror (5) and the second reflecting mirror
(8), the optical axis of described first reflecting mirror (5) incident illumination is disposed with principal goods mirror (1), the first frontal lens (2), before second thoroughly
Mirror (3) and focusing lens (4), reflect between the first reflecting mirror (5) and the second reflecting mirror (8) and be disposed with first on the optical axis of light
Rear lens (6) and the second rear lens (7), the optical axis of described second reflecting mirror (8) emergent light is provided with the 3rd rear lens (9)；
Described principal goods mirror (1) is the positive light coke planoconvex lens convex surface facing thing side, and described the first frontal lens (2) is negative power
Biconcave lens, described the second frontal lens (3) and the 3rd rear lens (9) are the biconvex lens of positive light coke, described focusing
Mirror (4) and the first rear lens (6) are the positive light coke meniscus lens convex surface facing the first reflecting mirror (5), after described second
Lens (7) are the negative power meniscus lens convex surface facing the second reflecting mirror (8).
The most according to claim 1 a kind of 1.3～5um broadband infrared imaging camera lenses, it is characterised in that described first
Reflecting mirror (5) and the second reflecting mirror (8) are oppositely arranged in 90 °.
The most according to claim 1 a kind of 1.3～5um broadband infrared imaging camera lenses, it is characterised in that described second
The front surface of frontal lens (3) is diffraction surfaces based on aspheric substrate.
The most according to claim 1 a kind of 1.3～5um broadband infrared imaging camera lenses, it is characterised in that described focusing
The front surface of mirror (4) is aspheric surface.
The most according to claim 1 a kind of 1.3～5um broadband infrared imaging camera lenses, it is characterised in that described first
The rear surface of rear lens (6) is aspheric surface.
6., according to the one 1.3～5um broadband infrared imaging camera lens described in claim 1 to 5 any one, its feature exists
In, described lens material is monocrystal silicon or zinc selenide.
The most according to claim 6 a kind of 1.3～5um broadband infrared imaging camera lenses, it is characterised in that described principal goods
Mirror (1), the first frontal lens (2), focusing lens (4), the second rear lens (7) and the 3rd rear lens (9) are monocrystal silicon lens.
The most according to claim 6 a kind of 1.3～5um broadband infrared imaging camera lenses, it is characterised in that described second
Frontal lens (3) and the first rear lens (6) are zinc selenide lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620646442.8U CN205720847U (en) | 2016-06-27 | 2016-06-27 | A kind of 1.3～5um broadband infrared imaging camera lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620646442.8U CN205720847U (en) | 2016-06-27 | 2016-06-27 | A kind of 1.3～5um broadband infrared imaging camera lenses |
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| CN205720847U true CN205720847U (en) | 2016-11-23 |
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| CN201620646442.8U Active CN205720847U (en) | 2016-06-27 | 2016-06-27 | A kind of 1.3～5um broadband infrared imaging camera lenses |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019534B (en) * | 2016-06-27 | 2018-06-22 | 湖北久之洋红外***股份有限公司 | One kind 1.3~5um broadband infrared imaging camera lenses |
| CN110989142A (en) * | 2019-12-30 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
-
2016
- 2016-06-27 CN CN201620646442.8U patent/CN205720847U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019534B (en) * | 2016-06-27 | 2018-06-22 | 湖北久之洋红外***股份有限公司 | One kind 1.3~5um broadband infrared imaging camera lenses |
| CN110989142A (en) * | 2019-12-30 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
| CN110989142B (en) * | 2019-12-30 | 2021-07-06 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
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| GR01 | Patent grant |