CN207198449U - Multispectral camera optical system - Google Patents
Multispectral camera optical system Download PDFInfo
- Publication number
- CN207198449U CN207198449U CN201721249597.9U CN201721249597U CN207198449U CN 207198449 U CN207198449 U CN 207198449U CN 201721249597 U CN201721249597 U CN 201721249597U CN 207198449 U CN207198449 U CN 207198449U
- Authority
- CN
- China
- Prior art keywords
- microscope group
- optical system
- concave
- multispectral camera
- convex lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lenses (AREA)
- Microscoopes, Condenser (AREA)
Abstract
The utility model 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.Focusing microscope group of the present utility model 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 utility model 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
Optical technical field is the utility model is related to, 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.
Utility model content
Based on this, it is necessary to provide a kind of multispectral camera optical system of achievable zoom.
The utility model 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 mirror
Group includes the first concave-convex lens, the first biconvex lens and the first biconcave lens, and the diaphragm is arranged in the fixed microscope group, institute
Stating focusing 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 light
Direction of principal axis moves.
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 utility model are：Focusing microscope group of the present utility model 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 utility model disclosure satisfy that
Big visual field, high-resolution, height are as matter photograph picture demand, while optical system has focusing function, can realize different object distances
Under the conditions of blur-free imaging.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is multispectral camera optical system structure schematic diagram of the present utility model；
Fig. 2 is multispectral camera optical system light path schematic diagram of the present utility model；
Fig. 3 is modulation transfer function (MTF) figure of multispectral camera optical system image planes of the present utility model；
Fig. 4 is the curvature of field distortion figure figure of multispectral camera optical system of the present utility model.
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
The utility model is described in detail presently in connection with accompanying drawing.This figure is simplified schematic diagram, only in a schematic way
Illustrate basic structure of the present utility model, therefore it only shows the composition relevant with the utility model.
As shown in figure 1, the utility model provides a kind of multispectral camera optical system, including set gradually from thing side
Window 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.
Multispectral lens design spectral region of the present utility model is 470nm~1025nm, and diagonal angles of visual field is 24 °,
The F numbers that work are 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 each piece of lens when a kind of multispectral camera optical system object distance of the utility model is 2m
Design parameter value, wherein " surface " one column gives each piece of lens surface reference numeral；" radius " one column gives each table
Spherical radius corresponding to face；" thickness/spacing " column gives the axial distance between adjacent surface, if two surface belongs to
In same lens, then thickness value represents the lens thickness, otherwise expression thing/image planes to spacing between lens distance or adjacent lens；
" semiaperture " one column gives 1/2 aperture value on corresponding surface.
A kind of each lens design data of multispectral camera optical system of the utility model of table 2
A kind of modulation transfer function (MTF) figure of multispectral camera optical system image planes of the utility model is illustrated in figure 3,
Each visual 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 utility model a kind of curvature of field and distortion figure of multispectral camera optical system are illustrated in figure 4, as seen from the figure originally
For the curvature of the image of utility model camera within 0.1mm, distortion is respectively less than 0.02%, meets image quality requirement.
Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, by above-mentioned description, related work
Personnel can carry out various changes and amendments in without departing from the scope of the utility model completely.This item utility model
Technical scope is not limited to the content on specification, it is necessary to determines its technical scope 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 |
|---|---|---|---|
| CN201721249597.9U CN207198449U (en) | 2017-09-27 | 2017-09-27 | Multispectral camera optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721249597.9U CN207198449U (en) | 2017-09-27 | 2017-09-27 | Multispectral camera optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207198449U true CN207198449U (en) | 2018-04-06 |
Family
ID=61786231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721249597.9U Active CN207198449U (en) | 2017-09-27 | 2017-09-27 | Multispectral camera optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207198449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608062A (en) * | 2017-09-27 | 2018-01-19 | 常州硕美光电科技有限公司 | Multispectral camera optical system |
-
2017
- 2017-09-27 CN CN201721249597.9U patent/CN207198449U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608062A (en) * | 2017-09-27 | 2018-01-19 | 常州硕美光电科技有限公司 | Multispectral camera optical system |
| CN107608062B (en) * | 2017-09-27 | 2024-07-26 | 常州硕美光电科技有限公司 | Multispectral camera optical system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11231565B2 (en) | Optical lens comprising eight lenses of −−++−++− refractive powers | |
| CN103424845B (en) | telephoto lens system | |
| CN206348502U (en) | Optical system | |
| CN108318995B (en) | Lens system and lens | |
| CN107272153A (en) | Optical lens | |
| CN105700117B (en) | A kind of optical imaging system | |
| CN107632376A (en) | Vision lenses | |
| TWI490537B (en) | Zoom lens and zoom lens module | |
| JP6711361B2 (en) | Imaging lens | |
| WO2012069491A1 (en) | Super wide angle lens arrangement for infrared applications | |
| CN110007438A (en) | A kind of number aerial mapping color camera telecentric optical system | |
| CN110007439A (en) | A kind of number aerial mapping full-color camera telecentric optical system | |
| CN106980173A (en) | Wide-angle image lens set | |
| CN102590996A (en) | Wide-band wide-field off-axis three-reflector variable focal length optical system | |
| CN205787330U (en) | A kind of long-wave infrared continuous zoom lens | |
| CN205263386U (en) | Long -focus long wave infrared continuous zoom lens | |
| CN207198449U (en) | Multispectral camera optical system | |
| CN205539672U (en) | Super wide angle micro lens who can be used to monitored control system | |
| CN117348219A (en) | Zoom optical system | |
| CN106094183B (en) | Focusing-style optical imaging system in a kind of high image quality | |
| CN205581383U (en) | High picture height is like matter optical imaging system | |
| CN209690604U (en) | A kind of number aerial mapping full-color camera telecentric optical system | |
| CN204945480U (en) | Large target surface continuous zooming optical system | |
| CN206248906U (en) | A kind of unmanned plane camera lens | |
| CN105759399B (en) | Imaging lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |