CN205720851U - A kind of refrigeration mode two-waveband infrared optical system - Google Patents
A kind of refrigeration mode two-waveband infrared optical system Download PDFInfo
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- CN205720851U CN205720851U CN201620646028.7U CN201620646028U CN205720851U CN 205720851 U CN205720851 U CN 205720851U CN 201620646028 U CN201620646028 U CN 201620646028U CN 205720851 U CN205720851 U CN 205720851U
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Abstract
The utility model discloses a kind of refrigeration mode two-waveband infrared optical system, include LONG WAVE INFRARED optical system and medium-wave infrared optical system the most successively, described LONG WAVE INFRARED optical system forms by fixing group after main objective lens, light splitting flat board, long wave relay lens group, long wave reflecting mirror, long wave focusing lens and long wave successively, and described medium-wave infrared optical system forms by fixing group after main objective lens, light splitting flat board, medium wave relay lens group, medium wave reflecting mirror, medium wave focusing lens and medium wave successively；Refrigeration mode medium wave long wave two-waveband infrared optical system uses the pupil linking of secondary imaging structural shape, beneficially Infrared Imaging Spectrometer, reduces volume and weight, simple and stable structure.
Description
Technical field
This utility model belongs to infrared optics technical field, is specifically related to a kind of refrigeration mode medium wave/long wave dual-band infrared
Optical system.
Background technology
Infrared spectrometer is scientific research and analyzes very important equipment in detection, and field level multiband infrared imaging
Spectrogrph is detection and the analytical equipment of a new generation, has the characteristic of " collection of illustrative plates unification ", combines conventional spectrometers and become with photoelectricity
As the feature of technology, two-dimensional image information and high-resolution spectral information can be provided simultaneously, have comprehensive imaging analysis energy
Power, higher spectral resolution, have extensively in fields such as marine environmental monitoring, air pollution monitoring, national defence research, public safeties
General using value.
Multiband infrared optical system, as the core component of field level multiband Infrared Imaging Spectrometer, responds ripple
Segment limit is wider, it is possible to obtain more rich spectral information, makes the analysis of equipment and detectivity be greatly improved.
For making field level multiband Infrared Imaging Spectrometer obtain the highest detection and analysis ability more accurately, multiband is red
Outer optical system uses refrigeration mode detector, and in order to obtain less volume and weight, multiband infrared optical system need and
Infrared Imaging Spectrometer interference optics carries out strict pupil coupling.
Patent No. 200910272921.2 two-waveband infrared optical system before reported, uses uncooled detector,
And the problem not proposing pupil coupling；Patent No. 201110198848.6 bicolor dual-view field infrared imaging optical system is applied
Background is search and track target, therefore does not also account for pupil matching problem；Both of which cannot meet the infrared one-tenth of field level multiband
As spectrogrph uses requirement.
Summary of the invention
The purpose of this utility model is according to the deficiencies in the prior art, a kind of refrigeration mode medium wave/long wave two waveband of design
Infrared optical system, to solve field level multiband Infrared Imaging Spectrometer pupil matching problem, and then reduces imaging spectrometer
Volume and weight.
This utility model solves its technical problem and be the technical scheme is that a kind of refrigeration mode two-waveband infrared optical system
System, includes LONG WAVE INFRARED optical system and medium-wave infrared optical system the most successively；Described LONG WAVE INFRARED optics
System includes main objective lens and the light splitting flat board being successively set on incident light axis, and is successively set on light splitting flat board transmission
Long wave relay lens group on the optical axis of light and long wave reflecting mirror, and be successively set on the optical axis of long wave reflecting mirror reflection light
Long wave focusing lens and long wave after fix group；Described medium-wave infrared optical system includes being successively set on light splitting flat reflective
Medium wave relay lens group on the optical axis of light and medium wave reflecting mirror, and be successively set on the optical axis of medium wave reflecting mirror reflection light
Medium wave focusing lens and medium wave after fix group；The principal goods that described medium-wave infrared optical system and LONG WAVE INFRARED optical system share
Mirror group includes that the first principal goods mirror and the second principal goods mirror, the first described principal goods mirror are saturating convex surface facing the positive light coke plano-convex of thing side
Mirror, the second described principal goods mirror is negative power planoconcave lens；The described plate glass that light splitting flat board is front surface plated film, with
Realize LONG WAVE INFRARED transmission and medium-wave infrared reflection；Described long wave relay lens group includes the first long wave relay lens and second
Long wave relay lens, the first described long wave relay lens is the concave surface positive light coke meniscus lens towards light splitting flat board, described
The second long wave relay lens be the concave surface negative power meniscus lens towards long wave reflecting mirror；Described long wave focusing lens is
The a piece of biconvex lens with positive light coke；After described long wave, fixing group is curved convex surface facing the positive light coke of long wave reflecting mirror
Month lens；Described medium wave relay lens group includes the first medium wave relay lens and the second medium wave relay lens, described first
Medium wave relay lens is negative power biconcave lens, and the second described medium wave relay lens convex surface facing medium wave reflecting mirror is just
Focal power meniscus lens；Fix group after described medium wave focusing lens and medium wave and be positive light Jiao convex surface facing medium wave reflecting mirror
Degree meniscus lens.
Described a kind of refrigeration mode two-waveband infrared optical system, the service band of its LONG WAVE INFRARED optical system is
7.7—12μm；The service band of described medium-wave infrared optical system is 3.7 4.8 μm, and F number is 2.
Described a kind of refrigeration mode two-waveband infrared optical system, its light splitting flat board normal is at 45 ° with the optical axis of incident illumination
Angle；Described long wave reflecting mirror normal and the optical axis angle at 45 ° of transmission light；Described medium wave reflecting mirror normal and reflection light
Optical axis angle at 45 °.
Described a kind of refrigeration mode two-waveband infrared optical system, the rear surface of its first long wave relay lens, long wave are adjusted
The front surface of focus lens and/or the front surface of the second medium wave relay lens are high order aspheric surface.
Described a kind of refrigeration mode two-waveband infrared optical system, the plated film on its light splitting flat board is spectro-film.
Described a kind of refrigeration mode two-waveband infrared optical system, its lens material is monocrystal silicon or monocrystalline germanium；Described
Light splitting flat board uses single crystal germanium material.
Further, described a kind of refrigeration mode two-waveband infrared optical system, its first principal goods mirror, the second principal goods mirror,
Fix group after one long wave relay lens, the second long wave relay lens, long wave focusing lens, long wave and the second medium wave relay lens is equal
For monocrystalline germanium lens, described light splitting flat board is monocrystalline germanium plate glass.
Described a kind of refrigeration mode two-waveband infrared optical system, its first medium wave relay lens, medium wave focusing lens and
Fix group after medium wave and be monocrystal silicon lens.
The beneficial effects of the utility model are:
1, this utility model uses secondary imaging structural shape, not only achieves 100% cold stop efficiency, is also set by entrance pupil
Put before main objective lens at 400mm, beneficially Infrared Imaging Spectrometer pupil linking, reduce volume and weight, simple in construction and
And it is stable.
2, this utility model only uses conventional single germanium and monocrystal silicon infra-red material, and carries out aspheric on single crystal germanium material
Face is designed, and improves the picture element of optical system, shortens length.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is this utility model medium-wave infrared optical system transfer curve figure when 16lp/mm；
Fig. 3 is this utility model LONG WAVE INFRARED optical system transfer curve figure when 16lp/mm；
Fig. 4 is the disc of confusion figure of this utility model medium-wave infrared optical system；
Fig. 5 is the disc of confusion figure of this utility model LONG WAVE INFRARED optical system.
Each reference is: 1 main objective lens, 11 first principal goods mirrors, 12 second principal goods mirrors, 2 light splitting flat boards,
3 long wave relay lens group, 31 first long wave relay lenss, 32 second long wave relay lenss, 4 long wave reflecting mirrors, 5
Long wave focusing lens, fixes group after 6 long waves, 7 medium wave relay lens group, 71 first medium wave relay lenss, and 72 second
Medium wave relay lens, 8 medium wave reflecting mirrors, 9 medium wave focusing lenss, fix group after 10 medium waves.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail.
With reference to shown in Fig. 1, as basic embodiment, the utility model discloses a kind of refrigeration mode two-waveband infrared optical
System, includes LONG WAVE INFRARED optical system and medium-wave infrared optical system the most successively.
Described LONG WAVE INFRARED optical system is successively by main objective lens 1, light splitting flat board 2, long wave relay lens group 3, long wave
Fixing group 6 composition after reflecting mirror 4, long wave focusing lens 5 and long wave；Described medium-wave infrared optical system is successively by main objective lens
1, fixing group 10 composition after light splitting flat board 2, medium wave relay lens group 7, medium wave reflecting mirror 8, medium wave focusing lens 9 and medium wave.
Wherein: the main objective lens 1 that described medium-wave infrared optical system and LONG WAVE INFRARED optical system share includes that first is main
Object lens 11 and the second principal goods mirror 12, the first described principal goods mirror 11 is the positive light coke planoconvex lens convex surface facing thing side, described
The first principal goods mirror 11 convex surface direction outwardly is provided with entrance pupil position, the second described principal goods mirror 12 is that negative power plano-concave is saturating
Mirror, optical material is germanium.
The plate glass of the described germanium material that light splitting flat board 2 is front surface plated film, tilts 45 ° of uses, i.e. light splitting flat boards 2
Normal and the optical axis angle at 45 ° of incident illumination, to realize LONG WAVE INFRARED transmission and medium-wave infrared reflection, further, light splitting flat board 2
On plated film be spectro-film, after light splitting flat board 2, LONG WAVE INFRARED optical axis has the skew of Y-direction, the size of side-play amount d with
Refractive Index of Material is relevant with thickness.
Described long wave relay lens group 3 is made up of two panels meniscus lens, is germainium lens, and first is fixing before bending towards
Group, second dorsad before fixing group, the i.e. first long wave relay lens 31 is that concave surface is saturating towards the positive light coke bent moon of light splitting flat board 2
Mirror, the second described long wave relay lens 32 is the concave surface negative power meniscus lens towards long wave reflecting mirror 4.
Light path is carried out 90 ° of space turnovers by described long wave reflecting mirror 4, and its normal and optical axis included angle are 45 °, main purpose
It is to fold light path, improves space availability ratio.
Described long wave focusing lens 5 is a piece of biconvex germainium lens with positive light coke, can axially move, and is used for mending
The LONG WAVE INFRARED system picture element that when repaying different temperatures different object distances, image planes drift causes declines.
After described long wave, fixing group 6 is made up of a piece of bent moon germainium lens, is the positive light convex surface facing long wave reflecting mirror 4
Focal power meniscus lens, is used for light collection to long wave detector target surface.
Described medium wave relay lens group 7 includes the first medium wave relay lens 71 and the second medium wave relay lens 72, described
The first medium wave relay lens 71 be negative power concave-concave silicon lens, the second described medium wave relay lens 72 be convex surface facing in
The positive light coke germanium meniscus lens of wave reflection mirror 8.
Described medium wave reflecting mirror 8 normal and the optical axis angle at 45 ° reflecting light, main purpose is to fold light path, improves
Space availability ratio.
After described medium wave focusing lens 9 and medium wave, fixing group 10 is the positive light coke convex surface facing medium wave reflecting mirror 8
Meniscus lens, the medium-wave infrared system picture element that when being used for compensating different temperatures different object distances, image planes drift causes declines.
After medium wave focusing lens 9 and medium wave, fixing group 10 is monocrystal silicon lens.
After described medium wave, fixing group 10 is made up of a piece of lens, by light collection to detector target surface.
This utility model optical system uses secondary imaging design, and the most Polaroid face is positioned at main objective lens 1 and light splitting
Between flat board 2, secondary imaging face is positioned at system image planes.Wherein the service band of LONG WAVE INFRARED optical system is 7.7 12 μm, and
The service band of medium-wave infrared optical system is 3.7 4.8 μm, and F number is 2.
This utility model optical system specific design parameter is as shown in the table.
In upper table, radius of curvature refer to the radius of curvature of each lens surface, thickness or interval refer to lens thickness or
Adjacent mirror surface distance, material is eyeglass material therefor, and air refers to medium air between two lens.
Specifically, the radius of curvature of the front surface of the first described principal goods mirror 11 is 432.5mm, its forward and backward surface
Spacing is 13mm.The radius of curvature of the rear surface of the second described principal goods mirror 12 is-889.2mm, and the spacing on its forward and backward surface is
9mm, the spacing between front surface and the rear surface of the first principal goods mirror 11 of the second described principal goods mirror 12 is 16.84mm.Described
The spacing on forward and backward surface of light splitting flat board 2 be 8mm, the front surface of described light splitting flat board 2 and the rear table of the second principal goods mirror 12
Spacing between face is 255.98mm.
The radius of curvature on the forward and backward surface of the first described long wave relay lens 31 is respectively-56.89 and-56.599mm,
The spacing on its forward and backward surface is 8mm, the front surface of the first described long wave relay lens 31 and the rear surface of light splitting flat board 2 it
Between spacing be 54.21mm.The radius of curvature on the forward and backward surface of the second described long wave relay lens 32 is respectively 54.33 Hes
44.06mm, the spacing on its forward and backward surface is 8mm, the front surface of the second described long wave relay lens 32 and the first long wave relaying
Spacing between the rear surface of lens 31 is 3.94mm.
The spacing on the forward and backward surface of described long wave reflecting mirror 4 is 8mm, the front surface of described long wave reflecting mirror 4 and
Spacing between the rear surface of two long wave relay lenss 32 is 42.01mm.
The radius of curvature on the forward and backward surface of described long wave focusing lens 5 is respectively 252.058 and-970.5mm, before it,
The spacing of rear surface is 8mm, the spacing between front surface and the front surface of long wave reflecting mirror 4 of described long wave focusing lens 5
For 71.59mm.After described long wave, the radius of curvature on the forward and backward surface of fixing group 6 is respectively 31.62 and 28.12mm, before it,
The spacing of rear surface is 8mm, between fixing after described long wave between front surface and the rear surface of long wave focusing lens 5 of group 6
Away from for 18.27mm, after described long wave, the distance between rear surface and the image planes of fixing group 6 is 9.14mm.
The radius of curvature on the forward and backward surface of the first described medium wave relay lens 71 is respectively-679.2 and 178.65mm,
The spacing on its forward and backward surface is 7mm, the front surface of the first described medium wave relay lens 71 and the front surface of light splitting flat board 2 it
Between spacing be 40mm.The radius of curvature on the forward and backward surface of the second described medium wave relay lens 72 be respectively-238.345 and-
101.16mm, the spacing on its forward and backward surface is 8mm, in the front surface of the second described medium wave relay lens 72 and the first medium wave
The spacing between the rear surface of lens 71 that continues is 5.84mm.
The spacing on the forward and backward surface of described medium wave reflecting mirror 8 is 8mm, the front surface of described medium wave reflecting mirror 8 and
Spacing between the rear surface of two medium wave relay lenss 72 is 60.92mm.The forward and backward surface of described medium wave focusing lens 9
Radius of curvature is respectively 96.16 and 210.4mm, and the spacing on its forward and backward surface is 7mm, the front table of described medium wave focusing lens 9
Spacing between the front surface of face and medium wave reflecting mirror 8 is 69.5mm.
After described medium wave, the radius of curvature on the forward and backward surface of fixing group 10 is respectively 34.99 and 37.33mm, and it is forward and backward
The spacing on surface is 6mm, fixes the spacing between front surface and the rear surface of medium wave focusing lens 9 of group 10 after described medium wave
For 9mm, after described medium wave, the distance between rear surface and the image planes of fixing group 10 is 8.5mm.
Following table is this utility model system transfer function values at 16lp/mm
For making system obtain reasonable picture element, system uses three aspheric surfaces, and avoids at bore bigger principal goods mirror
On the silicon materials that group is bigger with hardness, aspheric surface is set, before the rear surface of the first long wave relay lens 31, long wave focusing lens 5
The front surface of surface and/or the second medium wave relay lens 72 is high order aspheric surface.
Following table is its asphericity coefficient.
Aspherical equation is defined as follows:
This utility model is by actually used proof: this optical system structure is compact, the image quality of long wave/medium wave system
Well, system entrance pupil (aperture diaphragm via hole diameter diaphragm front optical system imaging is referred to as entrance pupil, is called for short entrance pupil) position
Before main objective lens 1 at 400mm, it is beneficial to and imaging spectrometer interference optics carries out pupil coupling, can be effective and infrared
Imaging spectrometer interference optics carries out pupil coupling；Emergent pupil is positioned on the cold stop of refrigeration detector, makes system meet
100% cold stop efficiency.
Fig. 2 to Fig. 5 is the optical simulation datagram of this utility model optical system.Wherein: the abscissa in Fig. 2 and Fig. 3
For the demand pairs of every millimeter, vertical coordinate is contrast numerical value.
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. a refrigeration mode two-waveband infrared optical system, it is characterised in that: include LONG WAVE INFRARED light the most successively
System and medium-wave infrared optical system；
Described LONG WAVE INFRARED optical system includes main objective lens (1) and the light splitting flat board being successively set on incident light axis
, and the long wave relay lens group (3) that is successively set on the optical axis of light splitting flat board (2) transmission light and long wave reflecting mirror (2)
(4), and group is fixed after being successively set on the long wave focusing lens (5) on the optical axis of long wave reflecting mirror (4) reflection light and long wave
(6)；
Described medium-wave infrared optical system includes that the medium wave relaying being successively set on the optical axis of light splitting flat board (2) reflection light is saturating
Mirror group (7) and medium wave reflecting mirror (8), and the medium wave focusing being successively set on the optical axis of medium wave reflecting mirror (8) reflection light is thoroughly
Group (10) is fixed after mirror (9) and medium wave；
The main objective lens (1) that described medium-wave infrared optical system and LONG WAVE INFRARED optical system share includes the first principal goods mirror (11)
With the second principal goods mirror (12), the first described principal goods mirror (11) is the positive light coke planoconvex lens convex surface facing thing side, described
Second principal goods mirror (12) is negative power planoconcave lens；
The described plate glass that light splitting flat board (2) is front surface plated film, to realize LONG WAVE INFRARED transmission and medium-wave infrared reflection；
Described long wave relay lens group (3) includes the first long wave relay lens (31) and the second long wave relay lens (32), institute
The the first long wave relay lens (31) stated is the concave surface positive light coke meniscus lens towards light splitting flat board (2), and described second is long
Ripple relay lens (32) is the concave surface negative power meniscus lens towards long wave reflecting mirror (4)；
Described long wave focusing lens (5) is a piece of biconvex lens with positive light coke；
Fixing group (6) after described long wave is the positive light coke meniscus lens convex surface facing long wave reflecting mirror (4)；
Described medium wave relay lens group (7) includes the first medium wave relay lens (71) and the second medium wave relay lens (72), institute
The the first medium wave relay lens (71) stated is negative power biconcave lens, and the second described medium wave relay lens (72) is convex surface court
Positive light coke meniscus lens to medium wave reflecting mirror (8)；
Fix group (10) after described medium wave focusing lens (9) and medium wave and be positive light Jiao convex surface facing medium wave reflecting mirror (8)
Degree meniscus lens.
A kind of refrigeration mode two-waveband infrared optical system the most according to claim 1, it is characterised in that described long wave is red
The service band of outer optical system is 7.7 12 μm；The service band of described medium-wave infrared optical system is 3.7 4.8 μm,
F number is 2.
A kind of refrigeration mode two-waveband infrared optical system the most according to claim 1, it is characterised in that described light splitting is put down
Plate (2) normal and the optical axis angle at 45 ° of incident illumination；Described long wave reflecting mirror (4) normal and the optical axis folder at 45 ° of transmission light
Angle；Described medium wave reflecting mirror (8) normal and the optical axis angle at 45 ° reflecting light.
A kind of refrigeration mode two-waveband infrared optical system the most according to claim 1, it is characterised in that described first is long
The rear surface of ripple relay lens (31), the front surface of long wave focusing lens (5) and/or the front table of the second medium wave relay lens (72)
Face is high order aspheric surface.
A kind of refrigeration mode two-waveband infrared optical system the most according to claim 1, it is characterised in that described light splitting flat board
(2) plated film on is spectro-film.
A kind of refrigeration mode two-waveband infrared optical system the most according to claim 1, it is characterised in that described lens material
Material is monocrystal silicon or monocrystalline germanium；Described light splitting flat board (2) uses single crystal germanium material.
A kind of refrigeration mode two-waveband infrared optical system the most according to claim 6, it is characterised in that described first is main
The focusing of object lens (11), the second principal goods mirror (12), the first long wave relay lens (31), the second long wave relay lens (32), long wave is thoroughly
Fixing group (6) after mirror (5), long wave and the second medium wave relay lens (72) is monocrystalline germanium lens, described light splitting flat board (2) is
Monocrystalline germanium plate glass.
A kind of refrigeration mode two-waveband infrared optical system the most according to claim 6, it is characterised in that in described first
Fix group (10) after ripple relay lens (71), medium wave focusing lens (9) and medium wave and be monocrystal silicon lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620646028.7U CN205720851U (en) | 2016-06-27 | 2016-06-27 | A kind of refrigeration mode two-waveband infrared optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620646028.7U CN205720851U (en) | 2016-06-27 | 2016-06-27 | A kind of refrigeration mode two-waveband infrared optical system |
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| Publication Number | Publication Date |
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| CN205720851U true CN205720851U (en) | 2016-11-23 |
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ID=57317034
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|---|---|---|---|
| CN201620646028.7U Withdrawn - After Issue CN205720851U (en) | 2016-06-27 | 2016-06-27 | A kind of refrigeration mode two-waveband infrared optical system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019544A (en) * | 2016-06-27 | 2016-10-12 | 湖北久之洋红外系统股份有限公司 | Refrigeration type double wave band infrared optical system |
| CN111751915A (en) * | 2020-06-27 | 2020-10-09 | 同济大学 | Compact infrared viewfinder optical system based on free-form surface prism |
| CN114114623A (en) * | 2021-12-02 | 2022-03-01 | 湖北久之洋红外系统股份有限公司 | High-resolution dual-channel medium wave infrared optical system |
-
2016
- 2016-06-27 CN CN201620646028.7U patent/CN205720851U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019544A (en) * | 2016-06-27 | 2016-10-12 | 湖北久之洋红外系统股份有限公司 | Refrigeration type double wave band infrared optical system |
| CN106019544B (en) * | 2016-06-27 | 2018-07-10 | 湖北久之洋红外系统股份有限公司 | A kind of refrigeration mode two-waveband infrared optical system |
| CN111751915A (en) * | 2020-06-27 | 2020-10-09 | 同济大学 | Compact infrared viewfinder optical system based on free-form surface prism |
| CN111751915B (en) * | 2020-06-27 | 2021-05-11 | 同济大学 | Compact infrared viewfinder optical system based on free-form surface prism |
| CN114114623A (en) * | 2021-12-02 | 2022-03-01 | 湖北久之洋红外系统股份有限公司 | High-resolution dual-channel medium wave infrared optical system |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20161123 Effective date of abandoning: 20180710 |