CN110196486A - A kind of infrared long wave optical of 75mm diffraction surfaces is without thermalization camera lens and imaging method - Google Patents
A kind of infrared long wave optical of 75mm diffraction surfaces is without thermalization camera lens and imaging method Download PDFInfo
- Publication number
- CN110196486A CN110196486A CN201910507322.8A CN201910507322A CN110196486A CN 110196486 A CN110196486 A CN 110196486A CN 201910507322 A CN201910507322 A CN 201910507322A CN 110196486 A CN110196486 A CN 110196486A
- Authority
- CN
- China
- Prior art keywords
- lens
- positive lens
- positive
- long wave
- negative
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- 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
- G02B13/0035—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 three lenses
-
- 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
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention provides a kind of infrared long wave optical of 75mm diffraction surfaces without thermalization camera lens and imaging method, including lens barrel, positive lens A, negative lens B and positive lens C are disposed with from left to right along light incident direction in the lens barrel, airspace between the positive lens A and negative lens B is 13mm, and the airspace between negative lens B and positive lens C is 49.4mm.Structure of the invention is compact, easy to carry, is able to maintain under high and low temperature state, realizes optics athermal, improves service efficiency, and cost of manufacture is cheap, has practicability and novelty.
Description
Technical field
The present invention relates to a kind of infrared long wave optical of 75mm diffraction surfaces without thermalization camera lens and imaging method.
Background technique
With the development of science and technology, infrared imagery technique has been widely used in national defence, industry, medical treatment, electric power detection etc.
Field, has broad application prospects and use value.Infrared acquisition have it is certain penetrate the abilities such as cigarette, mist, haze, snow and
It identifies the ability of camouflage, is not interfered and blinding, be may be implemented at a distance, round-the-clock observation is especially suitable by the strong light in battlefield, flash of light
Target acquisition under night and bad-weather condition.Modulation Transfer Function (modulation transfer function, letter
Claim MTF) it is the solution of present analysis camera lens as more scientific method.
Temperature can not only impact the refractive index of optical material and also can cause to expand with heat and contract with cold to lens barrel material, cause light
Focal power variation and optimum image plane shift.Image is smudgy, and contrast decline reduces quality of optical imaging, final to influence
The imaging performance of camera lens, meanwhile, current infrared long wave optical generally uses selenizing Zinc material without the camera lens material of thermalization camera lens, by
It is relatively valuable in selenizing Zinc material, cause product cost relatively high.
Summary of the invention
The present invention improves the above problem, i.e., the technical problem to be solved in the present invention is to provide a kind of 75mm diffraction
Flushing foreign minister's wave optical can satisfy under high/low temperature condition without thermalization camera lens and imaging method, realize the purpose of optics athermal,
And reduce camera lens cost.
Specific embodiments of the present invention are: a kind of infrared long wave optical of 75mm diffraction surfaces is provided without thermalization camera lens, including
Lens barrel, the lens barrel is interior to be disposed with positive lens A, negative lens B and positive lens C, institute along light incident direction from left to right
The airspace stated between positive lens A and negative lens B is 13mm, and the airspace between negative lens B and positive lens C is
49.4mm。
Further, the positive lens A and positive lens C material are sulphur based material IRG206, and negative lens B material is germanium material
Material.
Further, the positive lens A focal length is f1, negative lens B focal length is f2, positive lens C focal length is f3, by positive lens
A, the system focal length of negative lens B and positive lens C composition is f, and ratio meets: 1.1 < f1/ f < 1.5, -9 < f2/ f < -6,1.5
< f3/f<2.5。
Further, the positive lens A and positive lens C is non-spherical lens, and the negative lens B is meniscus lens.
Further, a kind of to utilize a kind of any infrared long wave optical of 75mm diffraction surfaces of claim 1 ~ 4 without thermalization mirror
The imaging method of head, light are imaged after passing sequentially through positive lens A, negative lens B and positive lens C from left to right.
Compared with prior art, the invention has the following advantages: present apparatus which has a compact structure and a reasonable design, is able to satisfy
At relatively high temperatures, the purpose of optics athermal is realized, it is easy to carry, facilitate operation, improves service efficiency, meanwhile, reduce system
Make cost, there is practicability.
Detailed description of the invention
Fig. 1 is the optical texture schematic diagram of the embodiment of the present invention；
Fig. 2 is 20 degrees Celsius of room temperature MTF schematic diagrames of the embodiment of the present invention；
Fig. 3 embodiment of the present invention is -40 degrees Celsius of low temperature MTF schematic diagrames；
Fig. 4 embodiment of the present invention is+80 celsius temperature MTF schematic diagrames；
Fig. 5 optical system relative illumination figure of the embodiment of the present invention.
In figure: 1- positive lens A, 2- negative lens B, 3- positive lens C.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Embodiment: as shown in Fig. 1 ~ 5, in the present embodiment, a kind of infrared long wave optical of 75mm diffraction surfaces is provided without thermalization mirror
Head, including lens barrel are disposed with positive lens A1, negative lens B2 and just in the lens barrel from left to right along light incident direction
Lens C3, the airspace between positive lens A and negative lens B is 13mm, and the airspace between negative lens B and positive lens C is
49.4mm。
In the present embodiment, the positive lens A and positive lens C material are sulphur based material IRG206, and negative lens B material is germanium material
Material.
Wherein, negative lens use germanium material apply diffractive optics technology, not only can achieve reduce lens materials at
This, while realizing athermal purpose under high/low temperature.
In the present embodiment, the positive lens A focal length is f1, negative lens B focal length is f2, positive lens C focal length is f3, by just thoroughly
The system focal length of mirror A, negative lens B and positive lens C composition is f, and ratio meets:
1.1< f1/f<1.5；
-9< f2/f<-6；
1.5< f3/f<2.5。
Aforementioned proportion condition is met, camera lens can be made reasonably to be corrected in the aberration of the wave-length coverage of 8~12um
And balance.
In the present embodiment, the positive lens A and positive lens C can be non-spherical lenses, and the negative lens B can be curved
Month lens.
Embodiment 2: on the basis of embodiment 1, in the present embodiment, the light of positive lens A, negative lens B and positive lens C composition
It learns structure and has reached following optical index:
(1) service band: 8um-12um；
(2) focal length: f '=75mm；
(3) relative aperture D/ f ': 1/1
(4) field angle: 8.26 ° × 6.62 °；
(5) it distorts: < 1%；
(6) 640 × 512,17 μm of LWIR Uncooled type resolution ratio: can be met；
(7) total length of light path≤96.5mm, optics rear cut-off distance 10.3mm.
Embodiment 3: on the basis of embodiment 1, in the present embodiment, the left side positive lens A is aspherical, the right side positive lens A
To be aspherical, the left side negative lens B is spherical surface, and the right side negative lens B is diffraction surfaces, and the left side positive lens C is aspherical, the right side positive lens C
Face is aspherical.
In the present embodiment, positive lens A, negative lens B and positive lens C composition optical component parameter table are as shown in table 1:
Table 1
In upper table, face serial number S1, S3, S5 are the mirror surface for seeing eyeglass from left to right, and face serial number S2, S4, S6 are from right mirror to the left
The mirror surface of piece.
It is aspherical to meet following equation in the present embodiment:
Wherein, when Z is the aspherical position for being r along optical axis direction arrival height, the distance away from aspheric vertex of surface is lost high；
C=1/r, r indicate the paraxial curvature radius of mirror surface, and k is circular cone coefficient；
A2, A4, A6, A8, A10 are expressed as high order aspheric surface coefficient.
High order aspheric surface coefficient table is as shown in table 2 below:
Table 2
Phase distribution function=M (B in the present embodiment, in diffraction surfaces S4 zemax1r2+ B2r4 B3r6), it is as shown in table 3 below:
Table 3
In the present embodiment, light is successively imaged after positive lens A, negative lens B and positive lens C from left to right.This reality
Simple with new structure, design rationally, under high-temperature, is still able to achieve the purpose of optics athermal, and change material, section
About cost has practicability.
Any technical solution disclosed in aforementioned present invention unless otherwise stated, if it discloses numberical range,
Disclosed numberical range is preferred numberical range, and any it should be appreciated by those skilled in the art preferred numberical ranges
The only obvious or representative numerical value of technical effect in many enforceable numerical value.It, can not since numerical value is more
Exhaustion, so the present invention just discloses technical solution of the component values to illustrate the present invention, also, the above-mentioned numerical value enumerated is not
The limitation to the invention protection scope should be constituted.
Meanwhile if aforementioned present invention discloses or relates to the components or structural member of connection fastened to each other, except another
There is statement outer, is fixedly connected it is to be understood that connection (such as using bolt or screw connection) can be removedly fixed, it can also
To understand are as follows: non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral type knot
Structure (such as manufacturing using casting technique is integrally formed) is replaced (obviously can not be using except integrally formed technique).
If the words such as " first ", " second " are used herein come if limiting components, those skilled in the art are answered
This knows: the use of " first ", " second " is intended merely to facilitate in description and is distinguished components as not having Stated otherwise
Outside, above-mentioned word has no special meaning.
In addition, for indicating the art of positional relationship or shape applied in any technical solution disclosed in aforementioned present invention
Its meaning includes approximate with its, similar or close state or shape to language unless otherwise stated.
Either component provided by the invention by multiple individual component parts either assembled, or one
The separate part that forming technology manufactures.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (5)
1. a kind of infrared long wave optical of 75mm diffraction surfaces is without thermalization camera lens, which is characterized in that including lens barrel, along light in the lens barrel
Line incident direction be disposed with from left to right positive lens A, negative lens B and positive lens C, the positive lens A and negative lens B it
Between airspace be 13mm, airspace between negative lens B and positive lens C is 49.4mm.
2. the infrared long wave optical of a kind of 75mm diffraction surfaces according to claim 1 is without thermalization camera lens, which is characterized in that described
Positive lens A and positive lens C material are sulphur based material IRG206, and negative lens B material is germanium material.
3. the infrared long wave optical of a kind of 75mm diffraction surfaces according to claim 2 is without thermalization camera lens, which is characterized in that described
Positive lens A focal length is f1, negative lens B focal length is f2, positive lens C focal length is f3, by positive lens A, negative lens B and positive lens C group
At system focal length be f, ratio meet: 1.1 < f1/ f < 1.5, -9 < f2/ f < -6,1.5 < f3/f<2.5。
4. without thermalization camera lens, feature exists a kind of any infrared long wave optical of 75mm diffraction surfaces according to claim 1 ~ 3
In the positive lens A and positive lens C are non-spherical lens, and the negative lens B is meniscus lens.
5. a kind of utilize a kind of any infrared imaging of the long wave optical without thermalization camera lens of 75mm diffraction surfaces of claim 1 ~ 4
Method, which is characterized in that light is imaged after passing sequentially through positive lens A, negative lens B and positive lens C from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910507322.8A CN110196486B (en) | 2019-06-12 | 2019-06-12 | 75mm diffraction surface infrared long-wave optical athermalization lens and imaging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910507322.8A CN110196486B (en) | 2019-06-12 | 2019-06-12 | 75mm diffraction surface infrared long-wave optical athermalization lens and imaging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110196486A true CN110196486A (en) | 2019-09-03 |
| CN110196486B CN110196486B (en) | 2023-07-21 |
Family
ID=67754423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910507322.8A Active CN110196486B (en) | 2019-06-12 | 2019-06-12 | 75mm diffraction surface infrared long-wave optical athermalization lens and imaging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110196486B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113885183A (en) * | 2021-09-18 | 2022-01-04 | 安徽光智科技有限公司 | Long-wave athermal infrared lens with focal length of 100mm |
| CN114236783A (en) * | 2021-11-30 | 2022-03-25 | 安徽光智科技有限公司 | Thermal difference eliminating infrared lens with focal length of 75mm and assembling method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221739A (en) * | 2010-04-15 | 2011-10-19 | 大立光电股份有限公司 | Shooting optical system |
| CN106842485A (en) * | 2017-04-17 | 2017-06-13 | 福建福光天瞳光学有限公司 | The electronic whole group focusing type non-brake method camera lens of three-chip type far infrared |
| CN209979922U (en) * | 2019-06-12 | 2020-01-21 | 福建福光天瞳光学有限公司 | 75mm diffraction surface infrared long-wave optical athermalization lens |
-
2019
- 2019-06-12 CN CN201910507322.8A patent/CN110196486B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221739A (en) * | 2010-04-15 | 2011-10-19 | 大立光电股份有限公司 | Shooting optical system |
| CN106842485A (en) * | 2017-04-17 | 2017-06-13 | 福建福光天瞳光学有限公司 | The electronic whole group focusing type non-brake method camera lens of three-chip type far infrared |
| CN209979922U (en) * | 2019-06-12 | 2020-01-21 | 福建福光天瞳光学有限公司 | 75mm diffraction surface infrared long-wave optical athermalization lens |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113885183A (en) * | 2021-09-18 | 2022-01-04 | 安徽光智科技有限公司 | Long-wave athermal infrared lens with focal length of 100mm |
| CN114236783A (en) * | 2021-11-30 | 2022-03-25 | 安徽光智科技有限公司 | Thermal difference eliminating infrared lens with focal length of 75mm and assembling method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110196486B (en) | 2023-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2008311392B2 (en) | Compact two-element infrared objective lens and IR or thermal sight for weapon having viewing optics | |
| CN102495474B (en) | Visible light/long-wave infrared broad band spectrum joint focusing optical imaging system | |
| CN108318995B (en) | Lens system and lens | |
| CN114265186B (en) | Optical lens | |
| CN110568590A (en) | Starlight-level optical lens and imaging method thereof | |
| CN109633873A (en) | Burnt infrared lens and its assembly method after a kind of long wavelength | |
| CN111025529B (en) | Ultra-small F number medium-long wave infrared fixed-focus lens | |
| CN110196486A (en) | A kind of infrared long wave optical of 75mm diffraction surfaces is without thermalization camera lens and imaging method | |
| CN114002819B (en) | Large-aperture high-definition day and night dual-purpose fixed-focus optical lens | |
| CN111999783B (en) | 8.4mm large-view-field infrared long-wave optical athermalization lens and imaging method | |
| TWM465574U (en) | Wide-angle two-piece type imaging lens module | |
| CN210742599U (en) | Starlight-level optical lens | |
| CN108319005A (en) | A kind of super clear 4K optical systems of the aspherical day and nights of 4mm | |
| CN206282023U (en) | Short-wave and long-wave infrared dual-waveband confocal-surface large-relative-aperture optical system | |
| CN217032766U (en) | Large-target-surface infrared optical athermalization lens capable of being matched with multi-type detectors by 25.0mm | |
| CN212675207U (en) | 8.4mm large-view-field infrared long-wave optical athermalization lens | |
| CN217085393U (en) | Day and night dual-purpose prime lens | |
| CN209979922U (en) | 75mm diffraction surface infrared long-wave optical athermalization lens | |
| CN113253431B (en) | Infrared confocal lens and imaging device | |
| CN211086778U (en) | Miniaturized day and night dual-purpose wide-angle lens | |
| WO2021014992A1 (en) | Imaging lens and imaging apparatus | |
| WO2023008148A1 (en) | Infrared imaging lens | |
| WO2022130909A1 (en) | Infrared imaging lens and infrared camera | |
| CN114002808B (en) | Infrared imaging optical system | |
| CN116027521B (en) | Optical athermalization lens with anti-fog function and imaging method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |