CN109188656A - A kind of megapixel medium wave refrigeration mode tight shot - Google Patents
A kind of megapixel medium wave refrigeration mode tight shot Download PDFInfo
- Publication number
- CN109188656A CN109188656A CN201811317935.7A CN201811317935A CN109188656A CN 109188656 A CN109188656 A CN 109188656A CN 201811317935 A CN201811317935 A CN 201811317935A CN 109188656 A CN109188656 A CN 109188656A
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- Prior art keywords
- lens
- positive
- refrigeration mode
- medium wave
- megapixel
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The invention discloses a kind of megapixel medium wave refrigeration mode tight shots, the first positive lens 1, the first negative lens 2, the second positive lens 3, the second negative lens 4, third positive lens 5 and detector window 6, the detector cold late 7 and detector focal plane 8 that the present invention is set gradually along light incident direction；Wherein, the F# of the megapixel medium wave refrigeration mode tight shot meets 2≤F#≤4, and focal length f' meets 50mm≤f'≤200mm.The medium wave refrigeration mode tight shot that the present invention obtains, it can be applied to face battle array scale 1280 × 1024, on 15 μm of pixel dimension of medium wave refrigeration mode detector, so that entire detection system meets compact, long-focus, big visual field, high-resolution application demand in fields such as safety monitorings, enhance its market competitiveness.
Description
Technical field
The present invention relates to infrared detector technical fields, more particularly to a kind of megapixel medium wave refrigeration mode fixed-focus mirror
Head.
Background technique
In recent years, medium wave refrigeration mode detector is quickly grown.With being constantly progressive for third generation focal plane technology, focal plane
Pixel scale be continuously increased, pixel dimension constantly reduces.320 × 256,640 × 512 face battle array scale has become instantly
Mainstream has a wide range of applications in fields such as safety monitorings.Currently, the medium wave refrigeration mode detector with mega pixel scale
It has come out.The expansion of detector array scale has very important significance for system application.It means that optics
System can effectively increase visual field, and the increasing of the incrementss of visual field and focal plane effective dimensions under the premise of keeping focal length not subtract
Dosage is substantially proportional to.The appearance of 1280 × 1024 pixel scale detectors, the detector compared to original 640 × 512, meaning
Optical system can not only obtain high-definition image, while field angle can also expand one under the premise of keeping focal length constant
Times.
Face battle array scale 1280 × 1024, the detection of 15 μm of pixel dimension of medium wave refrigeration mode detector major mainstream at home
There is corresponding product in device production firm.Correspondingly, the high definition camera lens for needing invention matched can use at present.
Summary of the invention
The present invention provides a kind of megapixel medium wave refrigeration mode tight shots, to solve in the prior art to medium wave system
Cold mould tight shot is not applied for the problem of medium wave refrigeration mode detector of mega pixel scale.
The present invention provides a kind of megapixel medium wave refrigeration mode tight shots, comprising: successively along light incident direction
The first positive lens 1, the first negative lens 2, the second positive lens 3, the second negative lens 4, third positive lens 5 and the detector being arranged
Window 6, detector cold late 7 and detector focal plane 8；Wherein, the F# of the megapixel medium wave refrigeration mode tight shot meets 2
≤ F#≤4, focal length f' meet 50mm≤f'≤200mm.
Preferably, the focal length f of first positive lens 11' meet 50mm≤f1'≤250mm；
The focal length f of first negative lens 22' satisfaction -150mm≤f2'≤-20mm；
The focal length f of second positive lens 33' meet 20mm≤f3'≤100mm；
The focal length f of second negative lens 44' satisfaction -100mm≤f4'≤-20mm；
The focal length f of the third positive lens 55' meet 20mm≤f5'≤100mm。
Preferably, first positive lens 1 is the positive meniscus lens with positive light coke；
First negative lens 2 is concave-concave, plano-concave or negative meniscus lens with negative power；
Second positive lens 3 is plano-convex or positive meniscus lens with positive light coke；
Second negative lens 4 is plano-concave or negative meniscus lens with negative power；
The third positive lens 5 is plano-convex or positive meniscus lens with positive light coke.
Preferably, the centre of sphere of 1 front and rear surfaces of the first positive lens is towards image planes.
Preferably, the material of first positive lens 1 and second positive lens 3 is silicon materials.
Preferably, the material of first negative lens 2, second negative lens 4 and the third positive lens 5 is germanium material
Material, selenizing Zinc material or chalcogenide glass.
Preferably, full between the optics overall length L and system focal length f' of the megapixel medium wave refrigeration mode tight shot
Sufficient condition: 0.8f'≤L≤1.5f'.
The present invention has the beneficial effect that:
The medium wave refrigeration mode tight shot that the present invention obtains can be applied to face battle array scale 1280 × 1024,15 μ of pixel dimension
On the medium wave refrigeration mode detector of m, so that entire imaging system meets compact, long-focus, big view in fields such as safety monitorings
Field, high-resolution application demand, enhance its market competitiveness.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the optical texture schematic diagram of the megapixel medium wave refrigeration mode tight shot of first embodiment of the invention；
Fig. 2 is the optical transfer function MTF curve of first embodiment of the invention；
Fig. 3 is the point range figure of first embodiment of the invention；
Fig. 4 is distortion and the spherical aberration curve of first embodiment of the invention；
Fig. 5 is the optical texture schematic diagram of second embodiment of the invention；
Fig. 6 is the optical transfer function MTF curve of second embodiment of the invention；
Fig. 7 is the point range figure of second embodiment of the invention；
Fig. 8 is distortion and the spherical aberration curve of second embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
The embodiment of the invention provides a kind of megapixel medium wave refrigeration mode tight shots, referring to Fig. 1, comprising:
The first positive lens 1, the first negative lens 2, the second positive lens 3, second set gradually along light incident direction is negative
Mirror 4, third positive lens 5 and detector window 6, detector cold late 7 and detector focal plane 8；Wherein, the megapixel
The F# of medium wave refrigeration mode tight shot meets 2≤F#≤4, and focal length f' meets 50mm≤f'≤200mm.
The medium wave refrigeration mode tight shot that the embodiment of the present invention obtains can be applied to face battle array scale 1280 × 1024, pixel
On 15 μm of size of medium wave refrigeration mode detector, so that entire detection system meets compact, focal length in fields such as safety monitorings
Away from, big visual field, high-resolution application demand, enhance its market competitiveness.
Also, optical lens of the invention is designed using small F#, is conducive to the light collecting light ability and contrast of raising system, is mentioned
High detector sensitivity；
In the embodiment of the present invention, the focal length f of first positive lens 11' meet 50mm≤f1'≤250mm, described first is negative
The focal length f of lens 22' satisfaction -150mm≤f2'≤- 20mm, the focal length f of second positive lens 33' meet 20mm≤f3'≤
100mm, the focal length f of second negative lens 44' satisfaction -100mm≤f4'≤- 20mm, the focal length f of the third positive lens 55'
Meet 20mm≤f5'≤100mm。
In the embodiment of the present invention, first positive lens 1 is the positive meniscus lens with positive light coke；
First negative lens 2 is concave-concave, plano-concave or negative meniscus lens with negative power；
Second positive lens 3 is plano-convex or positive meniscus lens with positive light coke；
Second negative lens 4 is plano-concave or negative meniscus lens with negative power；
The third positive lens 5 is plano-convex or positive meniscus lens with positive light coke.
And the centre of sphere of the first positive lens front and rear surfaces of the embodiment of the present invention is towards image planes.
When it is implemented, the material of the first positive lens 1 and second positive lens 3 described in the embodiment of the present invention is silicon material
Material.
The material of first negative lens 2, second negative lens 4 and the third positive lens 5 is germanium material, zinc selenide
Material or chalcogenide glass.
The optics overall length L and system focal length f' of the refrigeration mode tight shot of megapixel medium wave described in the embodiment of the present invention
Between meet condition: 0.8f'≤L≤1.5f'.
The optical lens focal plane size that the embodiment of the present invention obtains is big, and it is big that acquisition is taken into account while guaranteeing camera lens long-focus
Visual field, therefore it is suitable for while needing the optical system of long-focus and big visual field, in addition, the optical lens of the embodiment of the present invention
Spatial resolution is high, by 1280 × 1024,15 μm of medium wave refrigeration mode detector of matching, can obtain mega pixel resolution ratio
High-definition image, greatly improve the imaging effect of system, and, optical lens structure of the invention is simple, and transmitance is high, imaging
It can be good.
Meanwhile the optical lens imaging viewing field of the embodiment of the present invention is big, is conducive to expand range of observation, it is compatible a plurality of
Medium wave refrigeration mode detector, since optical lens tolerance sensitivity of the invention is low, the good manufacturability of processing and assembly, in eyeglass
Image quality requirement can be met by being directly combined after processing is completed with lens barrel, do not needed the processes such as advanced study and training, be conducive to batch metaplasia
It produces.
Second embodiment of the invention provides a kind of megapixel medium wave refrigeration mode tight shot, as shown in figure 5, lens barrel
Be not drawn into, including, optical system along the incident direction of light from left to right set gradually the first positive lens 1, the first negative lens 2,
Second positive lens 3, the second negative lens 4 and third positive lens 5, detector window 6, detector cold late 7 and detector focal plane 8 are
The F# that unites meets: 2≤F#≤4, system focal length f' meet: 50mm≤f'≤200mm, the focal length f of lens 11' meet 50mm≤f1'≤
250mm, the focal length f of lens 22' satisfaction -150mm≤f2'≤- 20mm, the focal length f of lens 33' meet 20mm≤f3'≤100mm,
The focal length f of lens 44' satisfaction -100mm≤f4'≤- 20mm, the focal length f of lens 55' meet 20mm≤f5'≤100mm。
First positive lens 1 of the embodiment of the present invention be the positive meniscus lens with positive light coke, the second positive lens 2 be with
Concave-concave, plano-concave or the negative meniscus lens of negative power, the second positive lens 3 are that plano-convex with positive light coke or positive bent moon are saturating
Mirror, the second negative lens 4 are plano-concave or negative meniscus lens with negative power, and third positive lens 5 is with positive light coke
Plano-convex or positive meniscus lens.The centre of sphere of first positive lens, 1 front and rear surfaces is towards image planes.
Further, the material selection silicon of above-mentioned first positive lens 1 and the second positive lens 3.First negative lens 2,4 and of lens
Germanium, zinc selenide or chalcogenide glass can be selected in the material of lens 5.
Further, the front and rear surfaces of above-mentioned first positive lens 1 and the second positive lens 3 are spherical surface.First negative lens 2,
The front and rear surfaces of second negative lens 4 and third positive lens 5 can be spherical surface or aspherical.
Further, between the optics overall length L and system focal length f' of above-mentioned megapixel medium wave refrigeration mode tight shot
Meet condition: 0.8f'≤L≤1.5f'.
Further, above-mentioned megapixel medium wave refrigeration mode tight shot is suitable for medium wave 3-5 mu m waveband, with 1280 ×
The refrigeration type infrared detector of 1024,15 μm and smaller target surface size, which matches, to be used.
According to the lens construction schematic diagram of Fig. 1, a kind of megapixel medium wave refrigeration mode tight shot embodiment 1 is designed,
Optical system focal length is 120mm, and F#2, field angle is 9.2 ° × 7.3 °, optical system overall length 139.7mm, design wavelength 3.7-
4.8 μm, the system design parameter is as shown in table 1.
Table 1 is system parameter table of the invention
Rotational symmetry even aspheric surface curved surface meets following equations:
In above formula, Z be it is aspherical along optical axis direction when being highly the position of Y, rise apart from aspheric vertex of surface, R is
The paraxial curvature radius of lens, K are circular cone coefficient, and A, B, C are high order aspheric surface coefficient.Table 2 is the aspheric of the embodiment of the present invention
Face parameter.
The aspherical parameter list of 2 embodiment of the present invention of table
| K | A | B | C | |
| S8 | 0 | 6.2590E-07 | -2.4950E-10 | 1.2490E-13 |
The MTF curve of 1 optical system of the present embodiment as shown in Fig. 2, point range figure as shown in figure 3, distortion and spherical aberration curve such as
Shown in Fig. 4, it can be seen from the figure that the embodiment has good optical property.
According to the lens construction schematic diagram of Fig. 5, a kind of megapixel medium wave refrigeration mode tight shot embodiment 2 is designed,
Optical system focal length is 120mm, and F#2, field angle is 9.2 ° × 7.3 °, optical system overall length 145.8mm, design wavelength 3.7-
4.8 μm, the system design parameter is as shown in table 3.
Table 3 is the system parameter table of the embodiment of the present invention
The MTF curve of 2 optical system of the present embodiment as shown in fig. 6, point range figure as shown in fig. 7, distortion and spherical aberration curve such as
Shown in Fig. 8.It can be seen from the figure that the embodiment has good optical property.
The present invention has at least the following advantages:
Advantages of the present invention:
1. optical lens focal plane size of the invention is big, is taken into account while guaranteeing camera lens long-focus and obtain big visual field, because
This is suitable for while needing the optical system of long-focus and big visual field.
2. optical lens spatial resolution of the invention is high, visited by 1280 × 1024,15 μm of matching of medium wave refrigeration mode
Device is surveyed, the high-definition image of mega pixel resolution ratio can be obtained, greatly improve the imaging effect of system.
3. optical lens of the invention is designed using small F#, be conducive to the light collecting light ability and contrast of raising system, improve
Detector sensitivity；
4. optical lens imaging viewing field of the invention is big, be conducive to expand range of observation, compatible a plurality of medium wave refrigeration modes
Detector；
5. optical lens structure of the invention is simple, transmitance is high, and imaging performance is good；
6. optical lens tolerance sensitivity of the invention is low, the good manufacturability of processing and assembly, processed in eyeglass and lens barrel
Image quality requirement can be met by being directly combined after the completion, do not needed the processes such as advanced study and training, be conducive to mass production.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of megapixel medium wave refrigeration mode tight shot characterized by comprising
It is the first positive lens (1) for being set gradually along light incident direction, the first negative lens (2), the second positive lens (3), second negative
Lens (4), third positive lens (5) and detector window (6), detector cold late (7) and detector focal plane (8)；Wherein, institute
The F# for stating megapixel medium wave refrigeration mode tight shot meets 2≤F#≤4, and focal length f' meets 50mm≤f'≤200mm.
2. megapixel medium wave refrigeration mode tight shot according to claim 1, which is characterized in that
The focal length f of first positive lens (1)1' meet 50mm≤f1'≤250mm；
The focal length f of first negative lens (2)2' satisfaction -150mm≤f2'≤-20mm；
The focal length f of second positive lens (3)3' meet 20mm≤f3'≤100mm；
The focal length f of second negative lens (4)4' satisfaction -100mm≤f4'≤-20mm；
The focal length f of the third positive lens (5)5' meet 20mm≤f5'≤100mm。
3. megapixel medium wave refrigeration mode tight shot according to claim 1, which is characterized in that
First positive lens (1) is the positive meniscus lens with positive light coke；
First negative lens (2) is concave-concave, plano-concave or negative meniscus lens with negative power；
Second positive lens (3) is plano-convex or positive meniscus lens with positive light coke；
Second negative lens (4) is plano-concave or negative meniscus lens with negative power；
The third positive lens (5) is plano-convex or positive meniscus lens with positive light coke.
4. megapixel medium wave refrigeration mode tight shot according to claim 3, which is characterized in that
The centre of sphere of first positive lens (1) front and rear surfaces is towards image planes.
5. megapixel medium wave refrigeration mode tight shot according to claim 1, which is characterized in that
The material of first positive lens (1) and second positive lens (3) is silicon materials.
6. megapixel medium wave refrigeration mode tight shot according to claim 1, which is characterized in that
The material of first negative lens (2), second negative lens (4) and the third positive lens (5) is germanium material, selenizing
Zinc material or chalcogenide glass.
7. megapixel medium wave refrigeration mode tight shot according to claim 1, which is characterized in that
Meet condition between the optics overall length L and system focal length f' of the megapixel medium wave refrigeration mode tight shot: 0.8f'
≤L≤1.5f'。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317935.7A CN109188656A (en) | 2018-11-07 | 2018-11-07 | A kind of megapixel medium wave refrigeration mode tight shot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317935.7A CN109188656A (en) | 2018-11-07 | 2018-11-07 | A kind of megapixel medium wave refrigeration mode tight shot |
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| CN109188656A true CN109188656A (en) | 2019-01-11 |
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| CN201811317935.7A Pending CN109188656A (en) | 2018-11-07 | 2018-11-07 | A kind of megapixel medium wave refrigeration mode tight shot |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161663A (en) * | 2019-04-22 | 2019-08-23 | 中国科学院西安光学精密机械研究所 | A kind of refrigeration mode is without the infrared fish eye optical systems of thermalization |
| CN111025529A (en) * | 2019-12-04 | 2020-04-17 | 湖北久之洋红外系统股份有限公司 | Ultra-small F number medium-long wave infrared fixed-focus lens |
| CN111505801A (en) * | 2020-05-18 | 2020-08-07 | 吉林工程技术师范学院 | Medium wave infrared optical system |
-
2018
- 2018-11-07 CN CN201811317935.7A patent/CN109188656A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161663A (en) * | 2019-04-22 | 2019-08-23 | 中国科学院西安光学精密机械研究所 | A kind of refrigeration mode is without the infrared fish eye optical systems of thermalization |
| CN110161663B (en) * | 2019-04-22 | 2020-04-03 | 中国科学院西安光学精密机械研究所 | Refrigeration type athermal infrared fisheye optical system |
| CN111025529A (en) * | 2019-12-04 | 2020-04-17 | 湖北久之洋红外系统股份有限公司 | Ultra-small F number medium-long wave infrared fixed-focus lens |
| CN111025529B (en) * | 2019-12-04 | 2021-12-17 | 湖北久之洋红外系统股份有限公司 | Ultra-small F number medium-long wave infrared fixed-focus lens |
| CN111505801A (en) * | 2020-05-18 | 2020-08-07 | 吉林工程技术师范学院 | Medium wave infrared optical system |
| CN111505801B (en) * | 2020-05-18 | 2021-09-14 | 吉林工程技术师范学院 | Medium wave infrared optical system |
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