CN205643832U - Burnt medium wave of well length becomes times optical lens for infrared two grades - Google Patents
Burnt medium wave of well length becomes times optical lens for infrared two grades Download PDFInfo
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- CN205643832U CN205643832U CN201620408623.7U CN201620408623U CN205643832U CN 205643832 U CN205643832 U CN 205643832U CN 201620408623 U CN201620408623 U CN 201620408623U CN 205643832 U CN205643832 U CN 205643832U
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Abstract
The utility model provides a burnt medium wave of well length becomes times optical lens for infrared two grades, including the imaging system setting gradually the front end formed at the first lens of same optical axis, second lens, third lens, fourth lens, the 5th lens, VI lenses and the system of scaling of rear end, an imaging system focus is 900mm, and the enlargement ratio of the system of scaling is 0.44 times, and systematic combined focal length is 400mm. The utility model discloses medium wave infrared (3.7 mu m~4.8 mu m) the system of zooming of shifting cooperates 640 480 resolution ratio medium waves refrigeration detector to realize trailing with the supervision long -distance object's detection formation of image.
Description
Technical field
This utility model relates to field of optical lens, particularly relates to focal length medium-wave infrared Switch-zoom optical lens in one.
Background technology
Zoom lens refers to can change focal length within the specific limits thus obtains the different angle of visual field and the imaging lens of different scenery scope.Zoom lens, in the case of not changing shooting distance, can change coverage by variation focal length, therefore highly beneficial for targeted surveillance and target following.The feature of zoom lens maximum is that it can carry out focus adjustment according to the actually used demand of user in its focal range, can utilize short focus big field conditions that target is scanned for, after searching target, then switch to long-focus small field of view target is amplified observation and surveillance and tracking.Optical zoom has focal length continuous variable, focal length to shift gears variable two kinds according to its zoom mode.The usual zoom rate of continuous vari-focus is slow, and the feedback of focal length to affect the distinguishing speed of target bearing by calculating.Gearshift zoom focal length is by prior demarcation and detection, and each shelves focal length accurately understands, and can quickly realize zoom and calculate target bearing.
Utility model content
Technical problem to be solved in the utility model is to propose a kind of medium-wave infrared (3.7 μm～4.8 μm) gearshift zoom system, pancreatic system, coordinate 640 × 480 resolution medium wave refrigeration detectors, reach the beneficial effect realizing the detection imaging to distant object with surveillance and tracking.
Technical solution of the present utility model is: focal length medium-wave infrared Switch-zoom optical lens in one, it is characterised in that: described optical lens includes Polaroid system and the panntographic system of rear end being successively set on the front end of the first lens of same optical axis, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens composition；Polaroid system focal is 900mm, and the enlargement ratio of panntographic system is 0.44 times, and the combined focal length of system is 400mm.
When system is in short coke-like state, arranging zoom mirror group between the first lens and the second lens, the focal length of Polaroid system is 180mm, realizes combined focal length 80mm of system with panntographic system after combining.
The lens of above-mentioned optical lens are high order aspheric surface mirrors.
The index parameter of optical lens: wavelength band: 3.7 μm～4.8 μm；Focal range: two grades of variable relative apertures of 80mm, 400mm: 1/4；Detector resolution: 640 × 480；Detector pixel dimension: 15 μm.
Camera lens of the present utility model can realize fast zoom at medium-wave infrared wave band, demand according to user carries out focal length selection, by short Jiao, target is carried out the search of big visual field, by focal length, target is carried out small field of view detailed survey and tracking, refrigeration mode medium wave detector can be coordinated, typical infrared target is carried out long-range detection.
Accompanying drawing explanation
Fig. 1 is this utility model focal length position optical system diagram；
Fig. 2 is this utility model short burnt position optical system diagram；
Fig. 3 is focal length position imaging MTF curve figure；
Fig. 4 is short burnt position imaging MTF curve figure；
Detailed description of the invention
This utility model is focal length medium-wave infrared Switch-zoom optical lens in one, optical system focal length position index path is as shown in Figure 1, system is made up of six-element lens altogether, being divided into Polaroid system and panntographic system composition, front end system focal length is 900mm, and the enlargement ratio of back-end system is 0.44 times, the combined focal length of system is 400mm, when system is in short coke-like state, by cutting zoom mirror group between the first lens, the second lens, see Fig. 2；The combined focal length realizing system after the focal length of front end imaging lens becomes 180mm, and the panntographic system combination of rear end is 80mm.
Optical lens index parameter: wavelength band: 3.7 μm～4.8 μm；Focal range: two grades of variable relative apertures of 80mm, 400mm: 1/4；Detector resolution: 640 × 480；Detector pixel dimension: 15 μm.
In order to make system have good imaging effect, employing high order aspheric surface in the design, make system aberration be well corrected, Fig. 3, Fig. 4 sets forth the MTF curve of imaging in the case of system focal length situation and short Jiao.It can be seen that system imaging quality is good, it is possible to meet actually used demand.
Claims (4)
1. focal length medium-wave infrared Switch-zoom optical lens in a kind, it is characterised in that: described optical lens bag
Include and be successively set on the first lens of same optical axis, the second lens, the 3rd lens, the 4th lens, the 5th saturating
The Polaroid system of the front end that mirror, the 6th lens form and the panntographic system of rear end；Polaroid system is burnt
Away from for 900mm, the enlargement ratio of panntographic system is 0.44 times, and the combined focal length of system is 400mm.
Middle focal length medium-wave infrared Switch-zoom optical lens the most according to claim 1, it is characterised in that:
When system is in short coke-like state, zoom mirror group, Polaroid system are set between the first lens and the second lens
Focal length be 180mm, realize combined focal length 80mm of system with panntographic system after combining.
Middle focal length medium-wave infrared Switch-zoom optical lens the most according to claim 2, it is characterised in that:
The lens of described optical lens are high order aspheric surface mirrors.
Middle focal length medium-wave infrared Switch-zoom optical lens the most according to claim 3, it is characterised in that:
The index parameter of optical lens: wavelength band: 3.7 μm～4.8 μm；Focal range: 80mm, 400mm two
The variable relative aperture of shelves: 1/4；Detector resolution: 640 × 480；Detector pixel dimension: 15 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620408623.7U CN205643832U (en) | 2016-05-06 | 2016-05-06 | Burnt medium wave of well length becomes times optical lens for infrared two grades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620408623.7U CN205643832U (en) | 2016-05-06 | 2016-05-06 | Burnt medium wave of well length becomes times optical lens for infrared two grades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205643832U true CN205643832U (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620408623.7U Active CN205643832U (en) | 2016-05-06 | 2016-05-06 | Burnt medium wave of well length becomes times optical lens for infrared two grades |
Country Status (1)
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| CN (1) | CN205643832U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624753A (en) * | 2020-04-27 | 2020-09-04 | 长春理工大学 | Broadband fine tracking cut-in type zoom lens |
| CN112666690A (en) * | 2020-12-28 | 2021-04-16 | 福建福光股份有限公司 | Switching refrigeration type long-wave infrared double-view-field lens |
| CN113281887A (en) * | 2021-07-20 | 2021-08-20 | 西安微普光电技术有限公司 | Searching and tracking integrated infrared zoom lens and imaging method |
| GB2608239A (en) * | 2021-04-23 | 2022-12-28 | Bae Sys Inf & Elect Sys Integ | Midwave infrared discrete zoom lens |
-
2016
- 2016-05-06 CN CN201620408623.7U patent/CN205643832U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624753A (en) * | 2020-04-27 | 2020-09-04 | 长春理工大学 | Broadband fine tracking cut-in type zoom lens |
| CN112666690A (en) * | 2020-12-28 | 2021-04-16 | 福建福光股份有限公司 | Switching refrigeration type long-wave infrared double-view-field lens |
| GB2608239A (en) * | 2021-04-23 | 2022-12-28 | Bae Sys Inf & Elect Sys Integ | Midwave infrared discrete zoom lens |
| CN113281887A (en) * | 2021-07-20 | 2021-08-20 | 西安微普光电技术有限公司 | Searching and tracking integrated infrared zoom lens and imaging method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |