CN107608062A - Multispectral camera optical system - Google Patents
Multispectral camera optical system Download PDFInfo
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- CN107608062A CN107608062A CN201710889935.3A CN201710889935A CN107608062A CN 107608062 A CN107608062 A CN 107608062A CN 201710889935 A CN201710889935 A CN 201710889935A CN 107608062 A CN107608062 A CN 107608062A
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- microscope group
- optical system
- concave
- multispectral camera
- convex lens
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- 230000003287 optical effect Effects 0.000 title claims abstract description 46
- 239000005357 flat glass Substances 0.000 claims abstract description 8
- 230000000007 visual effect Effects 0.000 claims abstract description 6
- 230000003595 spectral effect Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910052594 sapphire Inorganic materials 0.000 claims description 3
- 239000010980 sapphire Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a kind of multispectral camera optical system, including window glass, fixation microscope group, diaphragm, focusing microscope group, optical filter and the image planes set gradually from thing side, fixed microscope group includes the first concave-convex lens, the first biconvex lens and the first biconcave lens, diaphragm is arranged in fixed microscope group, focusing microscope group includes the second concave-convex lens, the 3rd concave-convex lens and the 4th concave-convex lens, and focusing microscope group can be moved integrally along optical axis direction.The focusing microscope group of the present invention can be moved integrally along optical axis direction, focusing microscope group can be adjusted relative to the distance of fixed microscope group according to different object distances, realize zoom, the present invention disclosure satisfy that big visual field, high-resolution, height as matter photograph picture demand, optical system has focusing function simultaneously, can realize the blur-free imaging under the conditions of different object distances.
Description
Technical field
The present invention relates to optical technical field, especially, is related to a kind of multispectral camera optical system.
Background technology
Multispectral camera is the different spectral coverage image that same ground object target is obtained using different spectrums, passes through different spectrums
The fusion of section image, the geometry and spectral properties of earth's surface scenery, the multispectral phases of that is with a wide range of applications can be obtained simultaneously
Machine be widely used at present Aero-Space investigation, state resource investigation and monitor, prevent and reduce natural disasters, agriculture, forestry, water conservancy, ecological environment,
The fields such as city construction planning and building.
General multispectral camera optical system uses reflective or refraction type structure more, and reflective structure does not introduce any color
Difference, and optical transmittance is high, but more serious central obscuration be present in reflective structure, the loss of system relative aperture is more tight
Weight, it is less suitable for relative aperture requires extra high uncooled detector, and the reflective structure angle of visual field generally compared with
It is small.Such issues that refraction type structure would not be present, but existing refraction type multispectral camera is typically all fixed-focus system, can not
Realize zoom.
The content of the invention
Based on this, it is necessary to provide a kind of multispectral camera optical system of achievable zoom.
The present invention solves its technical problem technical scheme to be taken：A kind of multispectral camera optical system, including
Window glass, fixation microscope group, diaphragm, focusing microscope group, optical filter and the image planes set gradually from thing side, the fixed microscope group bag
The first concave-convex lens, the first biconvex lens and the first biconcave lens are included, the diaphragm is arranged in the fixed microscope group, the tune
Burnt microscope group includes the second concave-convex lens, the 3rd concave-convex lens and the 4th concave-convex lens, and the focusing microscope group can be integrally along optical axis side
To movement.
Further, first concave-convex lens convex surface facing thing side.
Further, the diaphragm is arranged between first biconvex lens and the first biconcave lens.
Further, the diaphragm is 0.2mm apart from the convex surface vertex distance of first biconvex lens.
Further, the convex surface of second concave-convex lens, the 3rd concave-convex lens and the 4th concave-convex lens is equal
Towards image side surface.
Further, the window glass is sapphire material, thickness 3mm.
Further, the displacement of the focusing microscope group is 1.397mm, Focussing scope be 43.4845mm~
44.4344mm, corresponding 2m to infinity object distance.
The design spectral region of the multispectral camera optical system is 470nm~1025nm, and diagonal angles of visual field is
24 °, work F numbers are 5.
The detector resolution that the image planes use 6.5 μm of 6.5 μ m of single pixel size, that is, detects for 2048X2048
Device imaging size is 13.312mm × 13.312mm, catercorner length 18.826mm.
The beneficial effects of the invention are as follows：The focusing microscope group of the present invention can be moved integrally along optical axis direction, and focusing microscope group is relative
It can be adjusted in the distance of fixed microscope group according to different object distances, realize zoom, the present invention disclosure satisfy that big visual field, high-resolution
It is rate, high as matter is taken a picture picture demand, while optical system has focusing function, can realize under the conditions of different object distances it is clear into
Picture.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the multispectral camera optical system structure schematic diagram of the present invention；
Fig. 2 is the multispectral camera optical system light path schematic diagram of the present invention；
Fig. 3 is modulation transfer function (MTF) figure of the multispectral camera optical system image planes of the present invention；
Fig. 4 is the curvature of field distortion figure figure of the multispectral camera optical system of the present invention.
Parts title and its numbering are respectively in figure：
01st, window glass；02nd, diaphragm；03rd, optical filter；04th, image planes；G1, fixed microscope group；L1, the first concave-convex lens；L2、
First biconvex lens；L3, the first biconcave lens；G2, focusing microscope group；L4, the second concave-convex lens；L5, the 3rd concave-convex lens；L6、
4th concave-convex lens.
Embodiment
Presently in connection with accompanying drawing, the present invention is described in detail.This figure is simplified schematic diagram, is only illustrated in a schematic way
The basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
As shown in figure 1, the invention provides a kind of multispectral camera optical system, including the window set gradually from thing side
Mouth glass 01, fixed microscope group G1, diaphragm 02, focusing microscope group G2, optical filter 03 and image planes 04.
Window glass 01 is sapphire material, thickness 3mm, for protecting internal lens structure.
Fixed microscope group G1 includes the first concave-convex lens L1, the first biconvex lens L2 and the first biconcave lens L3, and first is concavo-convex
Lens L1 convex surface facing thing side.Diaphragm 02 is arranged between the first biconvex lens L2 and the first biconcave lens L3, diaphragm 02
Convex surface R4 vertex distances away from the first biconvex lens L2 are about 0.2mm.
Focusing microscope group G2 includes the second concave-convex lens L4, the 3rd concave-convex lens L5 and the 4th concave-convex lens L6, and second is concavo-convex
Lens L4, the 3rd concave-convex lens L5 and the 4th concave-convex lens L6 convex surface are towards image side surface.
Focusing microscope group G2 can be moved integrally along optical axis direction, and focusing microscope group G2 displacement is 1.397mm.Focusing microscope group
G2 can be adjusted relative to fixed microscope group G1 distance according to different object distances, and focusing microscope group G2 is relative to fixed microscope group G1's
Displacement is 1.397mm, and Focussing scope is 43.4845mm~44.4344mm, and corresponding 2m is to infinity object distance, such as table 1
Focusing microscope group G2 focussing distance and correspondence system focal length relation are shown, if the first row as shown by data is when object distance is 2m, is adjusted
Distances of the burnt microscope group G2 away from fixed microscope group G1 is 1mm, and it is 43.4845mm that multispectral camera, which corresponds to focal length, the second row as shown by data
When object distance is 3m, distances of the focusing microscope group G2 away from fixed microscope group G1 is 1.453mm, and multispectral camera corresponds to focal length and is
43.7883mm。
In focusing microscope group G2 moving process, the bounce of image planes 04 is less than 6um (an about pixel size), it is believed that optical system
System institute does not change into image and changed with focusing object distance, and image quality is stable.
The focussing distance and correspondence system focal length of the focusing microscope group of table 1
| Object distance (m) | Focusing group is away from fixed group distance (mm) | Corresponding focal length (mm) |
| 2 | 1 | 43.4845 |
| 3 | 1.453 | 43.7883 |
| 4 | 1.684 | 43.9447 |
| 5 | 1.825 | 44.0401 |
| 6 | 1.919 | 44.1044 |
| 7 | 1.986 | 44.1507 |
| 8 | 2.037 | 44.1855 |
| 9 | 2.077 | 44.2128 |
| 10 | 2.108 | 44.2347 |
| 20 | 2.252 | 44.3339 |
| 40 | 2.325 | 44.384 |
| 60 | 2.349 | 44.4008 |
| 80 | 2.361 | 44.4092 |
| 100 | 2.368 | 44.4142 |
| 200 | 2.383 | 44.4243 |
| 400 | 2.39 | 44.4294 |
| 800 | 2.394 | 44.4319 |
| ∞ | 2.397 | 44.4344 |
In present embodiment, the thickness of optical filter 03 is 3mm.
The detector resolution that image planes 04 use is 2048X2048,6.5 μm of 6.5 μ m of single pixel size, i.e. detector
Imaging size is 13.312mm × 13.312mm, catercorner length 18.826mm.
The multispectral lens design spectral region of the present invention is 470nm~1025nm, and diagonal angles of visual field is 24 °, and work F
Number is 5.
As shown in Fig. 2 being the light propagation path of multispectral camera optical system, light is entered with 24 ° of full filed angle
Window glass 01, after fixed microscope group G1 and focusing microscope group G2, image planes 04 are incided after optical filter 03.
As shown in table 2, it is the specific of each piece of lens when a kind of multispectral camera optical system object distance of the present invention is 2m
Parameter value, wherein " surface " one column gives each piece of lens surface reference numeral；" radius " one column gives each surface institute
Corresponding spherical radius；" thickness/spacing " column gives the axial distance between adjacent surface, if two surface belongs to same
One lens, then thickness value represent the lens thickness, otherwise expression thing/image planes to spacing between lens distance or adjacent lens；" half bore
The column of footpath " one gives 1/2 aperture value on corresponding surface.
A kind of each lens design data of multispectral camera optical system of the present invention of table 2
A kind of modulation transfer function (MTF) figure of multispectral camera optical system image planes of the present invention is illustrated in figure 3, is respectively regarded
Field is in the MTF that spatial frequency is at 77Lp/mm>0.48, transfer curve approaches with diffraction limit shown in figure, has good
Picture matter.
The present invention a kind of curvature of field and distortion figure of multispectral camera optical system are illustrated in figure 4, it is of the invention as seen from the figure
For the curvature of the image of camera within 0.1mm, distortion is respectively less than 0.02%, meets image quality requirement.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, related staff
Various changes and amendments can be carried out in without departing from the scope of the present invention completely.The technical scope of this invention is not
The content being confined on specification, it is necessary to which its technical scope is determined according to right.
Claims (9)
- A kind of 1. multispectral camera optical system, it is characterised in that：Including window glass, the fixed mirror set gradually from thing side Group, diaphragm, focusing microscope group, optical filter and image planes, the fixed microscope group include the first concave-convex lens, the first biconvex lens and first Biconcave lens, the diaphragm are arranged in the fixed microscope group, and the focusing microscope group includes the second concave-convex lens, the 3rd bumps thoroughly Mirror and the 4th concave-convex lens, the focusing microscope group can be moved integrally along optical axis direction.
- 2. multispectral camera optical system as claimed in claim 1, it is characterised in that：The convex surface court of first concave-convex lens To thing side.
- 3. multispectral camera optical system as claimed in claim 2, it is characterised in that：The diaphragm is arranged at described first pair Between convex lens and the first biconcave lens.
- 4. multispectral camera optical system as claimed in claim 3, it is characterised in that：The diaphragm is apart from first biconvex The convex surface vertex distance of lens is 0.2mm.
- 5. multispectral camera optical system as claimed in claim 1, it is characterised in that：Second concave-convex lens, described The convex surface of three concave-convex lens and the 4th concave-convex lens is towards image side surface.
- 6. multispectral camera optical system as claimed in claim 1, it is characterised in that：The window glass is sapphire material Matter, thickness 3mm.
- 7. multispectral camera optical system as claimed in claim 1, it is characterised in that：The displacement of the focusing microscope group is 1.397mm, Focussing scope are 43.4845mm~44.4344mm, corresponding 2m to infinity object distance.
- 8. multispectral camera optical system as claimed in claim 1, it is characterised in that：The multispectral camera optical system Design spectral region is 470nm~1025nm, and diagonal angles of visual field is 24 °, and work F numbers are 5.
- 9. multispectral camera optical system as claimed in claim 1, it is characterised in that：The detector that the image planes use is differentiated Rate is 2048X2048, and 6.5 μm of 6.5 μ m of single pixel size, i.e. detector image-forming size are 13.312mm × 13.312mm, Catercorner length 18.826mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889935.3A CN107608062B (en) | 2017-09-27 | Multispectral camera optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889935.3A CN107608062B (en) | 2017-09-27 | Multispectral camera optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107608062A true CN107608062A (en) | 2018-01-19 |
| CN107608062B CN107608062B (en) | 2024-07-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07209571A (en) * | 1994-01-17 | 1995-08-11 | Nikon Corp | Optical system with flare stopper |
| CN204229035U (en) * | 2014-07-02 | 2015-03-25 | 株式会社光学逻辑 | Pick-up lens |
| CN207198449U (en) * | 2017-09-27 | 2018-04-06 | 常州硕美光电科技有限公司 | Multispectral camera optical system |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07209571A (en) * | 1994-01-17 | 1995-08-11 | Nikon Corp | Optical system with flare stopper |
| CN204229035U (en) * | 2014-07-02 | 2015-03-25 | 株式会社光学逻辑 | Pick-up lens |
| CN207198449U (en) * | 2017-09-27 | 2018-04-06 | 常州硕美光电科技有限公司 | Multispectral camera optical system |
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