CN106896484B - Large-caliber mechanical passive athermal infrared telephoto lens and use method thereof - Google Patents
Large-caliber mechanical passive athermal infrared telephoto lens and use method thereof Download PDFInfo
- Publication number
- CN106896484B CN106896484B CN201710261023.1A CN201710261023A CN106896484B CN 106896484 B CN106896484 B CN 106896484B CN 201710261023 A CN201710261023 A CN 201710261023A CN 106896484 B CN106896484 B CN 106896484B
- Authority
- CN
- China
- Prior art keywords
- sleeve
- lens
- ring
- positive
- lens barrel
- 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
- 238000000034 method Methods 0.000 title description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003384 imaging method Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000035515 penetration Effects 0.000 description 3
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
- G02B13/146—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation with corrections for use in multiple wavelength bands, such as infrared and visible light, e.g. FLIR systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lenses (AREA)
Abstract
The invention relates to a large-caliber mechanical passive athermal infrared telephoto lens, which comprises a sleeve and an optical system arranged in the sleeve, wherein a positive lens A and a positive lens B are sequentially arranged in the optical system of the lens along the incident direction of light rays from left to right, a main lens barrel is coaxially sleeved in the sleeve, the positive lens A is arranged at the front end of the main lens barrel and is positioned by a front pressing ring, the positive lens B is arranged at the rear end of the main lens barrel and is positioned by a rear pressing ring, a telescopic ring is arranged between the main lens barrel and the sleeve, the front end of the telescopic ring is abutted with a front retaining ring screwed at the front end of the sleeve, the rear end of the telescopic ring is abutted with a first rear retaining ring screwed at the rear end of the main lens barrel, the rear end of the sleeve is screwed with a second rear retaining ring, a spring sheet is arranged between the first rear retaining ring and the second rear retaining ring, the air interval between the positive lens A and the positive lens B is 45.3mm, the structure is simple.
Description
Technical Field
The invention relates to a large-caliber mechanical passive athermal infrared telephoto lens and a using method thereof, belonging to the field of lenses.
Background
The long-wave infrared uncooled optical system is widely applied to the military and civil fields because the infrared lens has good anti-interference performance; the action distance is long in the evening; smoke penetration and haze penetration are strong; can work all weather and all day long; the method has the advantages of multi-target panoramic observation, tracking and target recognition capabilities, good target stealth resistance and the like, so that higher and higher requirements are put on the imaging quality of an optical system. However, because infrared optical materials and mechanical materials have certain thermal effects, severe changes of the working temperature can have serious influence on the optical system, for example, focal length changes, image plane drift, imaging quality degradation and the like are caused. Therefore, in order to adapt to different environmental temperatures, the infrared lens is required to have a certain temperature adaptive capability. However, most of the lenses on the market have complicated structures, high processing difficulty and cost, poor fog penetration, low resolution, long lens structure length and large volume, so that the lenses are also required to have simple and easy-to-process structures, and most of the lenses on the market are difficult to easily and quickly adjust the back intercept according to different object distances.
Disclosure of Invention
The invention aims to overcome the defects and provides a large-caliber mechanical passive athermal infrared telephoto lens with a reasonable structural design and a using method thereof.
The technical proposal of the invention is that the large-caliber mechanical passive athermal infrared telephoto lens comprises a sleeve and an optical system arranged in the sleeve, the optical system of the lens is sequentially provided with a positive focal lens A and a positive focal lens B along the incident direction of light rays from left to right, a main lens barrel is coaxially sleeved in the sleeve, the positive focusing lens A is arranged at the front end of the main lens barrel and is positioned by a front pressing ring, the positive optical focal lens B is arranged at the rear end of the main lens cone and is positioned by the rear pressing ring, a telescopic ring is arranged between the main lens cone and the sleeve, the front end of the telescopic ring is connected with a front retaining ring which is in threaded connection with the front end of the sleeve, the rear end of the telescopic ring is connected with a first rear retaining ring which is in threaded connection with the rear end of the main lens cone, the rear end of the sleeve is in threaded connection with a second rear check ring, an elastic sheet is arranged between the first rear check ring and the second rear check ring, the air gap between positive focal lens a and positive focal lens B was 45.3 mm.
Furthermore, the outer peripheral part of the sleeve is coaxially sleeved with an outer cover, a sealing ring is arranged between the front end of the outer cover and the sleeve, and the rear end of the outer cover is in threaded connection with the sleeve and is tightly fixed and limited through a limiting screw and a locking nail.
Furthermore, the cross sections of the sleeve, the outer cover, the telescopic ring and the main lens cone are sequentially reduced along the incident direction of light rays from left to right.
Furthermore, the rear end part of the outer cover is in threaded connection with a detector.
A method for using a large-caliber mechanical passive athermal infrared telephoto lens comprises the following steps: when the ambient temperature rises, the original focal plane shifts forwards to cause blurring because the positive focal lens A and the positive focal lens B expand simultaneously, at the moment, the expansion ring expands to push the main lens barrel to compress the elastic sheet so that the positive focal lens A and the positive focal lens B synchronously move backwards, the air distance between the main lens barrel and the detector is reduced, and the original forward-shifted focal plane is compensated.
Compared with the prior art, the invention has the following beneficial effects:
(1) the imaging device has high imaging resolution and high penetrability, and can capture objects with small temperature changes;
(2) the structure is simple and compact, the volume is small, the carrying is convenient, the manufacturing cost is low, and the large-scale production is suitable;
(3) rigidity calculation can be carried out in the structural design of the lens, the wall thickness is properly increased, the natural frequency is improved, the vibration resistance of the lens is improved, the use requirement of a system is met, and the sealing performance of the lens is guaranteed.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure:
a-positive optical focal lens A; b-positive optical focal lens B; 1-a sleeve; 2-a main barrel; 3-front pressing ring; 4-back pressing ring; 5-a telescopic ring; 6-front retainer ring; 7-a first rear retainer ring; 8-a second rear retainer ring; 9-a spring plate; 10-a housing; 11-a sealing ring; 12-a limit screw; 13-locking nail.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in the figure, the large-caliber mechanical passive athermalized infrared telephoto lens comprises a sleeve 1 and an optical system arranged in the sleeve, wherein an orthoscopic focal lens A and an orthoscopic focal lens B are sequentially arranged in the optical system of the lens along the incident direction of light rays from left to right, a main lens barrel 2 is coaxially sleeved in the sleeve, the orthoscopic focal lens A is arranged at the front end of the main lens barrel and is positioned by a front pressing ring 3, the orthoscopic focal lens B is arranged at the rear end of the main lens barrel and is positioned by a rear pressing ring 4, an expansion ring 5 is arranged between the main lens barrel and the sleeve, a front retaining ring 6 which is screwed at the front end of the sleeve is abutted to the front end of the expansion ring, a rear retaining ring I7 which is screwed at the rear end of the main lens barrel is abutted to the rear end of the expansion ring, a rear retaining ring II 8 is screwed to the rear end of the sleeve, and an elastic sheet 9 is arranged between the rear retaining ring I and the rear retaining ring II, the air gap between positive focal lens a and positive focal lens B was 45.3 mm.
In this embodiment, the outer peripheral part of the sleeve is coaxially sleeved with an outer cover 10, a seal ring 11 is arranged between the front end of the outer cover and the sleeve, and the rear end of the outer cover is in threaded connection with the sleeve and is tightened and limited through a limit screw 12 and a lock pin 13.
In this embodiment, the cross sections of the barrel body of the sleeve, the outer cover, the telescopic ring and the main lens barrel are sequentially reduced along the incident direction of light rays from left to right.
In this embodiment, the rear end of the housing is screwed with the probe.
A method for using a large-caliber mechanical passive athermal infrared telephoto lens comprises the following steps: when the ambient temperature rises, the original focal plane shifts forwards to cause blurring because the positive focal lens A and the positive focal lens B expand simultaneously, at the moment, the expansion ring expands to push the main lens barrel to compress the elastic sheet so that the positive focal lens A and the positive focal lens B synchronously move backwards, the air distance between the main lens barrel and the detector is reduced, and the original forward-shifted focal plane is compensated.
In the present embodiment, the optical system constituted by the lens group achieves the following optical indexes:
(1) the working wave band is as follows: 8-12 μm;
(2) focal length: f' =50 mm;
(3) a detector: the long-wave infrared non-refrigeration type is 640 multiplied by 512, 17 mu m;
(4) the field angle: 31 degrees;
(5) relative pore diameter D/f': 1/1.0;
(6) optical volume: ∅ 72mm × 62.25mm (diameter × length).
The data in the following table illustrate the optical parameters of the embodiments of the present invention.
Table one: parameters of each lens:
the specific surface type equation of the aspheric surface is as follows:
z is a distance rise from an aspheric vertex when the aspheric surface is at a height R in the optical axis direction, c =1/R, R =23.535, k =0, a0=0, a1= -6.645E-008, a2=1.219E-009, A3= -5.345E-010, a4= 1.337E-013.
In the design of a mechanical structure and an optical structure, the optical power is reasonably distributed, and the mechanical passive athermalization characteristic of temperature self-adaption is realized. The device can be adapted to a long-wave infrared non-refrigeration type 640 x 480, 17 mu m detector to execute live recording and security monitoring tasks; the focal power is reasonably distributed, the optical material expands with heat and contracts with cold at different temperatures, so that the curvature of the lens changes and the image surface drifts, the optical and mechanical hybrid passive athermalization utilizes the difference between the thermal characteristics of the optical mechanical material, the influence of the temperature is eliminated through the combination of materials with different characteristics, the image quality is kept stable in a larger range, the athermalization of temperature self-adaptation is realized, and the infrared optical system can keep good imaging quality in a larger temperature range; the main lens cone is integrally designed, so that the structure is extremely light, the installation is simple and convenient, and the cost is greatly reduced; the focus of the rear intercept is easily realized by rotating the sleeve, the object distance adjustment in a large range from infinity to an object distance of 0.5m is realized, and the imaging of any object distance is clear; the structure is simple, the volume is small, and the device is suitable for a miniaturized uncooled infrared optical system; the imaging device has high imaging resolution and high penetrability, and can capture objects with small temperature changes; the structure is compact, the manufacturing cost is low, and the method is suitable for large-scale production; on the premise of ensuring the compact structure, a series of measures are taken, so that the vibration and impact resistance of the lens is improved; the adjustment of the lens machinery without heating is realized by adopting a simple design, and the stability of lens imaging in different environments is further ensured; rigidity calculation can be carried out in the structural design of the lens, the wall thickness is properly increased, the natural frequency is improved, the vibration resistance of the lens is improved, and the use requirement of a system is ensured; the sealing performance of the lens is ensured.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A large-caliber mechanical passive athermal infrared telephoto lens is characterized in that: the optical system of the lens comprises a sleeve and an optical system arranged in the sleeve, wherein a positive optical focal lens A and a positive optical focal lens B are sequentially arranged in the optical system of the lens along the incident direction of light rays from left to right, a main lens barrel is coaxially sleeved in the sleeve, the positive optical focal lens A is installed at the front end of the main lens barrel and is positioned by a front pressing ring, the positive optical focal lens B is installed at the rear end of the main lens barrel and is positioned by a rear pressing ring, a telescopic ring is arranged between the main lens barrel and the sleeve, the front end of the telescopic ring is abutted with a front retaining ring screwed at the front end of the sleeve, the rear end of the telescopic ring is abutted with a first rear retaining ring screwed at the rear end of the main lens barrel, the rear end of the sleeve is screwed with a second rear retaining ring, a spring plate is arranged between the first rear retaining ring and the second rear retaining ring, and the air space between the positive optical focal lens A and the positive optical focal lens B is 45.3 mm; the outer periphery of the sleeve is coaxially sleeved with an outer cover, a sealing ring is arranged between the front end of the outer cover and the sleeve, and the rear end of the outer cover is in threaded connection with the sleeve and is tightly fixed and limited through a limiting screw and a locking nail; the cross sections of the sleeve, the outer cover, the telescopic ring and the main lens cone are sequentially reduced along the incident direction of light rays from left to right; the rear end part of the outer cover is in threaded connection with a detector; when the ambient temperature rises, the original focal plane shifts forwards to cause blurring because the positive focal lens A and the positive focal lens B expand simultaneously, at the moment, the expansion ring expands to push the main lens barrel to compress the elastic sheet so that the positive focal lens A and the positive focal lens B synchronously move backwards, the air distance between the main lens barrel and the detector is reduced, and the original forward-shifted focal plane is compensated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710261023.1A CN106896484B (en) | 2017-04-20 | 2017-04-20 | Large-caliber mechanical passive athermal infrared telephoto lens and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710261023.1A CN106896484B (en) | 2017-04-20 | 2017-04-20 | Large-caliber mechanical passive athermal infrared telephoto lens and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106896484A CN106896484A (en) | 2017-06-27 |
| CN106896484B true CN106896484B (en) | 2022-05-27 |
Family
ID=59196792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710261023.1A Active CN106896484B (en) | 2017-04-20 | 2017-04-20 | Large-caliber mechanical passive athermal infrared telephoto lens and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106896484B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110515056A (en) * | 2018-05-21 | 2019-11-29 | 上海济物光电技术有限公司 | Laser radar athermal optical receiver assembly |
| CN108594397B (en) * | 2018-06-20 | 2020-09-25 | 襄阳市雄狮光电科技有限公司 | Infrared lens structure shocks resistance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125275A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | Double Manual adjustable are without the infrared tight shot of transconversion into heat and method of work |
| CN106125251A (en) * | 2016-08-30 | 2016-11-16 | 福建福光天瞳光学有限公司 | Fixed non-brake method LONG WAVE INFRARED mixed type is without transconversion into heat camera lens and installation method thereof |
| CN106443941A (en) * | 2016-12-16 | 2017-02-22 | 福建福光天瞳光学有限公司 | F20mm mechanical passive athermalizing long wave infrared prime lens and focusing method thereof |
| CN106443942A (en) * | 2016-12-16 | 2017-02-22 | 福建福光天瞳光学有限公司 | F20 mm portable mechanical passive athermal infrared prime lens and using method thereof |
| CN206710690U (en) * | 2017-04-20 | 2017-12-05 | 福建福光天瞳光学有限公司 | A kind of heavy caliber machinery is passively without the infrared telephoto lens of thermalization |
-
2017
- 2017-04-20 CN CN201710261023.1A patent/CN106896484B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125275A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | Double Manual adjustable are without the infrared tight shot of transconversion into heat and method of work |
| CN106125251A (en) * | 2016-08-30 | 2016-11-16 | 福建福光天瞳光学有限公司 | Fixed non-brake method LONG WAVE INFRARED mixed type is without transconversion into heat camera lens and installation method thereof |
| CN106443941A (en) * | 2016-12-16 | 2017-02-22 | 福建福光天瞳光学有限公司 | F20mm mechanical passive athermalizing long wave infrared prime lens and focusing method thereof |
| CN106443942A (en) * | 2016-12-16 | 2017-02-22 | 福建福光天瞳光学有限公司 | F20 mm portable mechanical passive athermal infrared prime lens and using method thereof |
| CN206710690U (en) * | 2017-04-20 | 2017-12-05 | 福建福光天瞳光学有限公司 | A kind of heavy caliber machinery is passively without the infrared telephoto lens of thermalization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106896484A (en) | 2017-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105372796A (en) | Refrigeration type common-caliber medium/long-wave infrared double-waveband double-view-field dual-shift zoom optical system | |
| CN110749986B (en) | Infrared continuous zoom area array scanning optical system and image shift compensation method | |
| CN105137565A (en) | Uncooled long-wave infrared optical mechanical athermalizing lens and compensation adjustment method thereof | |
| CN210690931U (en) | Long-wave infrared zooming optical system for 1K detector | |
| CN106443940A (en) | High-fog-penetrating-property dual-compensation type optical machinery mixed athermalization long-wave infrared vehicle-mounted lens and compensation method thereof | |
| CN112305721B (en) | Infrared dual-band telescopic optical system | |
| CN106896484B (en) | Large-caliber mechanical passive athermal infrared telephoto lens and use method thereof | |
| CN104914557A (en) | Uncooled switching dual-field infrared optical system | |
| CN111025529B (en) | Ultra-small F number medium-long wave infrared fixed-focus lens | |
| CN210090814U (en) | Long-focus medium-wave infrared refrigeration double-view-field lens | |
| CN210090813U (en) | Economical thermal imaging continuous zoom lens | |
| CN109471246B (en) | Long-wave infrared optical athermalized lens and assembly method | |
| CN106443942A (en) | F20 mm portable mechanical passive athermal infrared prime lens and using method thereof | |
| CN106094156A (en) | F19mm vehicle-mounted far infrared machinery is without transconversion into heat camera lens | |
| CN214151214U (en) | Infrared dual-band telescopic optical system, search tracking system and forward-looking infrared system | |
| CN105467549A (en) | F5mm large relative aperture mechanical passive athermalization lens and compensation adjusting method thereof | |
| CN210270354U (en) | Wide-spectrum large-relative-aperture medium-long wave infrared imaging optical system | |
| CN209979913U (en) | Long-wave mechanical athermal focusing infrared lens | |
| CN114137699B (en) | Small high-resolution athermalized medium-wave infrared optical system | |
| CN114252982B (en) | Athermal infrared lens with focal length of 35mm, assembly method and imaging method thereof | |
| CN206020789U (en) | F19mm long wave non-brake method optics is without transconversion into heat camera lens | |
| CN206311816U (en) | Mist transmitting double compensation formula ray machine mixing high is without thermalization LONG WAVE INFRARED on-vehicle lens | |
| CN106405783B (en) | A kind of economical fixed structure formula uncooled ir camera lens of f8mm and its working method | |
| CN206133093U (en) | On -vehicle far infrared of f19mm machinery athermalization camera lens | |
| CN112363305A (en) | Microminiature medium wave infrared continuous zooming optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |