CN107065149A - Far infrared high transmittance camera lens and its method of work - Google Patents
Far infrared high transmittance camera lens and its method of work Download PDFInfo
- Publication number
- CN107065149A CN107065149A CN201710254932.2A CN201710254932A CN107065149A CN 107065149 A CN107065149 A CN 107065149A CN 201710254932 A CN201710254932 A CN 201710254932A CN 107065149 A CN107065149 A CN 107065149A
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- ring
- lens
- body tube
- far infrared
- high transmittance
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- 238000002834 transmittance Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000012634 fragment Substances 0.000 claims description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 3
- 230000003467 diminishing effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lenses (AREA)
Abstract
The present invention relates to a kind of far infrared high transmittance camera lens, including along light incident direction spaced positive lens A, negative lens B and positive lens C successively from left to right, airspace between the positive lens A and negative lens B is 2.19mm, and the airspace between the negative lens B and positive lens C is 22.47mm；Further relate to a kind of method of work of far infrared high transmittance camera lens.Camera lens of the present invention passes through after the completion of once mounting, and by the first expansion ring and the second expansion ring, temperature change is expanded with heat and contract with cold at any time, and the relatively rear body tube of preceding body tube is subjected to displacement change, it is not necessary to carry out secondary adjustment, use is more convenient；Structure design of the present invention is simple, compact, reasonable, and the ability of the impact of camera lens anti-vibration is strong.
Description
Technical field
The present invention relates to a kind of far infrared high transmittance camera lens and its method of work.
Background technology
With uncooled detector technology continue to develop with it is increasingly mature, LWIR Uncooled Optical System is in army
It is widely used with civil area, because infrared lens have good in anti-interference performance；Night operating distance is remote；Wear
Saturating flue dust, haze ability are strong；Can round-the-clock, round-the-clock work；With multiple target panorama observation, follow the trail of and target identification ability and
The advantages of ability of good anti-target stealth, so the image quality to optical system proposes higher and higher requirement.But
Because infrared optical material and mechanical material have certain fuel factor, the acute variation of operating temperature can be produced to optical system
Serious influence, such as causing focal length variations, image planes drift, image quality to decline.Therefore, in order to adapt to varying environment temperature
Degree, it is desirable to which infrared lens have certain temperature self-adaptation ability；And under long lasting for continuous monitoring left and right, more
Ask infrared lens that there is the features such as adapting to different weather climatic condition on a large scale, therefore also in the case of prolonged monitoring
Camera lens has that high resolution, mist transmitting be strong, aberration rate is low, features simple structure, the features such as intensity is reliable, stability is strong.However, market
Upper most lens construction is complicated, and difficulty of processing and cost are higher, and mist transmitting is poor, resolution ratio is low, is especially monitored at night
When because environment temperature is substantially close to so be difficult to differentiate between the form of monitored things.
The content of the invention
In view of the deficiencies in the prior art, the technical problems to be solved by the invention are to provide a kind of far infrared high transmittance mirror
Head and its method of work, not only reasonable in design, and efficiently convenient.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of far infrared high transmittance camera lens, including edge
Light incident direction from front to back successively spaced positive lens A, negative lens B and positive lens C, the positive lens A with it is negative
Airspace between lens B is 2.19mm, and the airspace between the negative lens B and positive lens C is 22.47mm.
It is preferred that, the positive lens A in body tube and compresses positioning before being arranged on preceding trim ring, the negative lens B and just
Lens C is set in sequence in rear body tube and compressed with rear trim ring and positioned, and BC is provided between the negative lens B and positive lens C
Spacer ring.
It is preferred that, the rear body tube has the interlayer to accommodate telescopic component, and the telescopic component includes cross section
The L-shaped collar, the flat end of the collar and preceding body tube thread connection, turning up for the collar hold side suitable from inside to outside
Sequence is arranged with the first expansion ring, locating ring and the second expansion ring, and the end opposite side of turning up of the collar is pressed on shell fragment, institute
The one end for stating the first expansion ring is pressed on the turning up on end of the collar, and the other end of first expansion ring is pressed on locating ring,
Before one end of second expansion ring is pressed on back-up ring, the preceding back-up ring is threadedly coupled with rear body tube, and described second stretches
The other end of ring is pressed on locating ring.
It is preferred that, the cross section of the locating ring is in zigzag.
It is preferred that, the shell fragment is arranged between the collar and rear body tube.
It is preferred that, the coefficient of expansion of first expansion ring and the second expansion ring is more than the coefficient of expansion of shell fragment.
It is preferred that, the preceding body tube is made with rear body tube of aluminum alloy materials.
A kind of method of work of far infrared high transmittance camera lens, including far infrared high transmittance mirror described in above-mentioned any one
Head, is comprised the steps of：
（1）When environment temperature is raised, positive light focus eyeglass A, negative light focus eyeglass B and positive light focus eyeglass C are expanded and led simultaneously
Causing original focal plane to shift forward causes to obscure, and now the first expansion ring expands against the collar with the second expansion ring and pressed backward
Contracting shell fragment, so that body tube is moved backward before driving, so that positive light focus eyeglass A and negative light focus eyeglass B air comes away from diminishing
Making up the focal plane of original biased forwards makes it return to clear picture under normal temperature state；
（2）When the environment temperature decreases, positive light focus eyeglass A, negative light focus eyeglass B and positive light focus eyeglass C shrink and led simultaneously
Causing original focal plane to shift backward causes to obscure, and now the first expansion ring and the second expansion ring shrink, and shell fragment promotes the collar
Travel forward, so that body tube travels forward before driving, so that positive light focus eyeglass A and negative light focus eyeglass B air is big away from change,
It is set to return to clear picture under normal temperature state to make up original focal plane offset backward.
Compared with prior art, the invention has the advantages that：
（1）Camera lens of the present invention passes through after the completion of once mounting, and by the first expansion ring and the second expansion ring, temperature change is entered at any time
Row expands with heat and contract with cold, and the relatively rear body tube of preceding body tube is subjected to displacement change, it is not necessary to carry out secondary adjustment, use is more convenient；
（2）Structure design of the present invention is simple, compact, reasonable, and the ability of the impact of camera lens anti-vibration is strong；
（3）Preceding body tube of the present invention uses aluminum alloy materials with rear body tube, not only improves the structural strength of camera lens, more
Further loss of weight, realizes lightweight.
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the structural representation of optical system of the embodiment of the present invention.
Fig. 2 is the unitary construction schematic diagram of the embodiment of the present invention.
In figure：A- positive lens A, B- negative lens B, C- positive lens C；
Trim ring after body tube after trim ring before body tube before 1-, 2-, 3-, 4-, 5-BC spacer rings, the 6- collars, the expansion rings of 7- first, 8- is fixed
Back-up ring before position ring, the expansion rings of 9- second, 10- shell fragments, 11-.
Embodiment
For the features described above and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing, make detailed
Carefully it is described as follows.
As shown in Figure 1 and 2, a kind of far infrared high transmittance camera lens, including be spaced successively from front to back along light incident direction
Positive lens A, the negative lens B and positive lens C of setting, the airspace between the positive lens A and negative lens B are 2.19mm,
Airspace between the negative lens B and positive lens C is 22.47mm.
In embodiments of the present invention, it is described in body tube 1 and with the compression positioning of preceding trim ring 2 before the positive lens A is arranged on
Negative lens B and positive lens C is set in sequence in rear body tube 3 and compressed with rear trim ring 4 and positioned, the negative lens B and positive lens C
Between be provided with BC spacer rings 5.
In embodiments of the present invention, the rear body tube 3 has the interlayer to accommodate telescopic component, the telescopic component
Comprising the L-shaped collar 6 in cross section, the flat end of the collar 6 and the preceding thread connection of body tube 1, the collar 6 turn up end
Side is sequentially arranged with the first expansion ring 7, the expansion ring 9 of locating ring 8 and second from inside to outside, and turning up for the collar 6 holds another
Side is pressed on shell fragment 10, and one end of first expansion ring 7 is pressed on the turning up on end of the collar 6, first expansion ring 7
The other end be pressed on locating ring 8, before one end of second expansion ring 9 is pressed on back-up ring 11, the preceding back-up ring 11 with
Body tube 3 is threadedly coupled afterwards, and the other end of second expansion ring 9 is pressed on locating ring 8.
In embodiments of the present invention, the cross section of the locating ring 8 is in zigzag.
In embodiments of the present invention, the shell fragment 10 is arranged between the collar 6 and rear body tube 3.
In embodiments of the present invention, the coefficient of expansion of first expansion ring 7 and the second expansion ring 9 is more than the swollen of shell fragment 10
Swollen coefficient.
In embodiments of the present invention, the preceding body tube 1 is made with rear body tube 3 of aluminum alloy materials.
In embodiments of the present invention, a kind of method of work of far infrared high transmittance camera lens, including above-mentioned any one institute
Far infrared high transmittance camera lens is stated, is comprised the steps of：
（1）When environment temperature is raised, positive light focus eyeglass A, negative light focus eyeglass B and positive light focus eyeglass C are expanded and led simultaneously
Causing original focal plane to shift forward causes to obscure, now the first expansion ring 7 and the second expansion ring 9 expand against the collar 6 to
Compress shell fragment 10 afterwards so that body tube 1 is moved backward before driving so that positive light focus eyeglass A and negative light focus eyeglass B air away from
Diminish, it is returned to clear picture under normal temperature state to make up the focal plane of original biased forwards；
（2）When the environment temperature decreases, positive light focus eyeglass A, negative light focus eyeglass B and positive light focus eyeglass C shrink and led simultaneously
Causing original focal plane to shift backward causes to obscure, and now the first expansion ring 7 is shunk with the second expansion ring 9, and shell fragment 10 is promoted
The collar 6 travels forward, so that body tube 1 travels forward before driving, so that positive light focus eyeglass A and negative light focus eyeglass B air
It is big away from becoming, it is returned to clear picture under normal temperature state to make up original focal plane offset backward.
In the present embodiment, the rear end of the connecting seat devises M34X0.75-6g ridge and video camera cooperation.
The optical system being made up of above-mentioned lens set has reached following optical index：
1）Focal length：；
2）Relative aperture；
3）The angle of visual field：；
4）Resolution ratio：Can be withDetector video camera is adapted to；
5）Total length of light path, optics rear cut-off distance；
6）It is applicable spectral line scope：；
7）The parameter of each eyeglass is referring to Fig. 2, and aspheric mask body face type equation is as follows：
,
Wherein：
The present invention is not limited to above-mentioned preferred forms, and anyone can show that other are each under the enlightenment of the present invention
The far infrared high transmittance camera lens and its method of work of the form of kind.All equivalent changes done according to scope of the present invention patent with
Modification, should all belong to the covering scope of the present invention.
Claims (8)
1. a kind of far infrared high transmittance camera lens, it is characterised in that：Including along light incident direction, interval is set successively from front to back
Positive lens A, the negative lens B and positive lens C put, the airspace between the positive lens A and negative lens B is 2.19mm, institute
It is 22.47mm to state the airspace between negative lens B and positive lens C.
2. far infrared high transmittance camera lens according to claim 1, it is characterised in that：The positive lens A is arranged on preceding master
Positioning is compressed in lens barrel and with preceding trim ring, and it is interior and with rear trim ring pressure that the negative lens B and positive lens C is set in sequence in rear body tube
Tightening position, BC spacer rings are provided between the negative lens B and positive lens C.
3. far infrared high transmittance camera lens according to claim 2, it is characterised in that：The rear body tube has to hold
Receive the interlayer of telescopic component, the telescopic component includes the L-shaped collar in cross section, the flat end of the collar and preceding body tube
Thread connection, that the first expansion ring, locating ring and second are sequentially arranged with from inside to outside is flexible for the end side of turning up of the collar
Ring, the end opposite side of turning up of the collar is pressed on shell fragment, and what one end of first expansion ring was pressed on the collar turns up end
On, the other end of first expansion ring is pressed on locating ring, before one end of second expansion ring is pressed on back-up ring, institute
State preceding back-up ring to be threadedly coupled with rear body tube, the other end of second expansion ring is pressed on locating ring.
4. far infrared high transmittance camera lens according to claim 3, it is characterised in that：The cross section of the locating ring is in Z
Font.
5. far infrared high transmittance camera lens according to claim 3, it is characterised in that：The shell fragment is arranged on the collar with after
Between body tube.
6. far infrared high transmittance camera lens according to claim 3, it is characterised in that：First expansion ring is stretched with second
The coefficient of expansion of contracting ring is more than the coefficient of expansion of shell fragment.
7. far infrared high transmittance camera lens according to claim 2, it is characterised in that：The preceding body tube and rear body tube
It is made of aluminum alloy materials.
8. a kind of method of work of far infrared high transmittance camera lens, it is characterised in that including such as claim 1 ~ 7 any one institute
Far infrared high transmittance camera lens is stated, is comprised the steps of：
（1）When environment temperature is raised, positive light focus eyeglass A, negative light focus eyeglass B and positive light focus eyeglass C are expanded and led simultaneously
Causing original focal plane to shift forward causes to obscure, and now the first expansion ring expands against the collar with the second expansion ring and pressed backward
Contracting shell fragment, so that body tube is moved backward before driving, so that positive light focus eyeglass A and negative light focus eyeglass B air comes away from diminishing
Making up the focal plane of original biased forwards makes it return to clear picture under normal temperature state；
（2）When the environment temperature decreases, positive light focus eyeglass A, negative light focus eyeglass B and positive light focus eyeglass C shrink and led simultaneously
Causing original focal plane to shift backward causes to obscure, and now the first expansion ring and the second expansion ring shrink, and shell fragment promotes the collar
Travel forward, so that body tube travels forward before driving, so that positive light focus eyeglass A and negative light focus eyeglass B air is big away from change,
It is set to return to clear picture under normal temperature state to make up original focal plane offset backward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254932.2A CN107065149A (en) | 2017-04-19 | 2017-04-19 | Far infrared high transmittance camera lens and its method of work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254932.2A CN107065149A (en) | 2017-04-19 | 2017-04-19 | Far infrared high transmittance camera lens and its method of work |
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| Publication Number | Publication Date |
|---|---|
| CN107065149A true CN107065149A (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710254932.2A Pending CN107065149A (en) | 2017-04-19 | 2017-04-19 | Far infrared high transmittance camera lens and its method of work |
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| 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 |
| CN206020799U (en) * | 2016-08-22 | 2017-03-15 | 福建福光天瞳光学有限公司 | Double Manual adjustables are without the infrared tight shot of transconversion into heat |
| CN106526809A (en) * | 2016-12-16 | 2017-03-22 | 福建福光天瞳光学有限公司 | Full-set focusing type optical passive athermalized long-wave infrared security lens |
| CN206848560U (en) * | 2017-04-19 | 2018-01-05 | 福建福光天瞳光学有限公司 | Far infrared high transmittance camera lens |
-
2017
- 2017-04-19 CN CN201710254932.2A patent/CN107065149A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125263A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | A kind of fixed type machinery of dolly-out,ing dolly-back is passive without transconversion into heat infrared lens and installation method thereof |
| CN206020799U (en) * | 2016-08-22 | 2017-03-15 | 福建福光天瞳光学有限公司 | Double Manual adjustables are without the infrared tight shot of transconversion into heat |
| CN106405783A (en) * | 2016-12-16 | 2017-02-15 | 福建福光天瞳光学有限公司 | f8mm economical fixed structure type non-refrigeration infrared lens and working 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 |
| CN106526809A (en) * | 2016-12-16 | 2017-03-22 | 福建福光天瞳光学有限公司 | Full-set focusing type optical passive athermalized long-wave infrared security lens |
| CN206848560U (en) * | 2017-04-19 | 2018-01-05 | 福建福光天瞳光学有限公司 | Far infrared high transmittance camera lens |
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Application publication date: 20170818 |