CN110261982A - Infrared lens and its assembly method with detachable-type sealed structure - Google Patents
Infrared lens and its assembly method with detachable-type sealed structure Download PDFInfo
- Publication number
- CN110261982A CN110261982A CN201910595194.7A CN201910595194A CN110261982A CN 110261982 A CN110261982 A CN 110261982A CN 201910595194 A CN201910595194 A CN 201910595194A CN 110261982 A CN110261982 A CN 110261982A
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- China
- Prior art keywords
- crescent moon
- focusing
- lens
- microscope base
- moon 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 description 5
- 238000009738 saturating Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 229920001800 Shellac Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
- 229940113147 shellac Drugs 0.000 description 1
- 235000013874 shellac Nutrition 0.000 description 1
- 239000004208 shellac Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention relates to a kind of infrared lens and its assembly method with detachable-type sealed structure, including body tube, preceding microscope base and focusing microscope base；Positive crescent moon lens A is installed in the preceding microscope base, negative crescent moon lens B is installed in the focusing microscope base, the primary mirror tube rear end is equipped with positive crescent moon lens C；Airspace between the positive crescent moon lens A and negative crescent moon lens B is 35.42-37.42mm, and the airspace between the negative crescent moon lens B and positive crescent moon lens C is 16.68-18.68mm；It is provided with the sealing ring positioned at the positive front end crescent moon lens A side in preceding microscope base, compress the annular gasket of sealing ring and compresses the A piece pressing ring of annular gasket.The infrared lens not only have good sealing good, but also convenient disassembly, are easy to subsequent and reprocess, and are suitble to secondary operation；And have many advantages, such as that compact-sized, light-weight, entire length is short, easy to carry.
Description
Technical field
The present invention relates to a kind of infrared lens and its assembly method with detachable-type sealed structure, belong to optical technology
Field.
Background technique
With the development of science and technology, infrared imagery technique has been widely used in fields such as national defence, industry, medical treatment.It is infrared
Detecting has certain ability for penetrating the abilities such as cigarette, mist, haze, snow and identification camouflage, not by the strong light in battlefield, flash of light interference and
Remote, round-the-clock observation, the target acquisition being particularly suitable under night and bad-weather condition may be implemented in blinding.So
Waterproof is proposed to infrared lens, moisture-proof, airtight requirement protects surface and element to exempt from affected by moisture and Atmospheric composition generation
Adverse reaction.
At present since the overall dimensions of infrared lens are larger, mainly takes and be filled with sealant between eyeglass and pressing ring
Sealing means, and be fixed with pressing ring；This mode has the advantages of good seal performance, high reliablity, is applicable to each
The camera lens of size；But this sealing structure appears in actual production reprocesses difficulty, and disassembly trouble is not suitable for secondary work
Industry.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of good airproof performance, convenient disassembly, convenient for it is subsequent reprocess have can
The infrared lens and its assembly method of detachable sealing structure.
The present invention is realized using following scheme: a kind of infrared lens with detachable-type sealed structure, including body tube,
The body tube front end is equipped with preceding microscope base, and the focusing microscope base that can be moved forward and backward is equipped in body tube；Peace in the preceding microscope base
Equipped with positive crescent moon lens A, negative crescent moon lens B is installed, it is saturating that the primary mirror tube rear end is equipped with positive crescent moon in the focusing microscope base
Mirror C；Airspace between the positive crescent moon lens A and negative crescent moon lens B is 35.42-37.42mm, the negative crescent moon lens B
Airspace between positive crescent moon lens C is 16.68-18.68mm；It is provided in preceding microscope base positioned at the positive front end crescent moon lens A
The sealing ring of side, the annular gasket for compressing sealing ring and the A piece pressing ring for compressing annular gasket.
Further, the radius of curvature of the positive preceding mirror surface of crescent moon lens A and rear mirror surface is respectively 69.3mm and 96.2mm,
With a thickness of 7mm；It is 39.5mm that mirror surface, which is radius of curvature, before negative crescent moon lens B, rear mirror surface be it is aspherical, with a thickness of 4.2mm；The first month of the lunar year
The radius of curvature of the preceding mirror surface of tooth lens C and rear mirror surface is respectively 47.6mm and 66.4mm, with a thickness of 3mm.
Further, outer in the middle part of the body tube to be cased with focusing cam, the focusing cam is driven by focusing guide pin and is adjusted
Burnt microscope base is moved forward and backward；The two sides opposite positioned at focusing cam are respectively arranged with focusing motor and microswitch, and focus motor master
Adjustment gear on axis is meshed with the outer gear ring of focusing cam.
Further, in the preceding microscope base, in focusing microscope base and primary mirror tube rear end is respectively arranged with that head on positive crescent moon saturating
The hole rank of mirror A, negative crescent moon lens B and positive crescent moon lens C three rear end outer edge；It is provided with that press against negative crescent moon saturating in focusing microscope base
The B piece pressing ring in mirror B front outer portion, primary mirror tube rear end are internally provided with the C piece pressure for pressing against positive crescent moon lens C front outer portion
Circle；Cam pressing ring positioned at focusing cam rear end to fix focusing cam axial position is installed on the outside of body tube.
A kind of another technical solution of the invention: assembly of the infrared lens with detachable-type sealed structure as described above
Method, comprising the following steps: the following steps are included: positive crescent moon lens C is packed into primary mirror tube rear end by (1), be then threaded into C piece pressing ring
It is fixed；(2) focusing microscope base is connect by guide pin of focusing with body tube and focusing cam and screws on cam pressing ring limit
Make the axial position of focusing cam；(3) negative crescent moon lens B is fitted into focusing microscope base, and is compressed by screwing in B piece pressing ring
It is fixed；(4) preceding microscope base is fixedly mounted on body tube front end using screw, before positive crescent moon lens A is fitted into microscope base and according to this
Sealing ring, annular gasket and A piece pressing ring is packed into be fixed.
Compared with prior art, the invention has the following advantages: infrared lens of the present invention not only have it is good close
Envelope can be good, reliable and stable, and convenient disassembly, eyeglass secondary can be replaced, be easy to subsequent and reprocess, and is suitble to secondary operation, very well
Solve the problems, such as using sealant seal presence；Have that compact-sized, light-weight, entire length is short, carrying side simultaneously
Just the advantages that, has greatly reduced the size of camera lens, can be adapted to 640 × 512,14 μm of detectors of LWIR Uncooled, into
Row document recording and monitor task, and cost of manufacture is cheap, is suitble to large-scale production.
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, specific embodiment and phase will be passed through below
Attached drawing is closed, invention is further described in detail.
Detailed description of the invention
Fig. 1 is schematic diagram of internal structure of the embodiment of the present invention；
Fig. 2 is perspective view of the embodiment of the present invention；
Fig. 3 is the local structure schematic diagram in Fig. 1；
Figure label illustrates: 1-A piece pressing ring, 2- annular gasket, 3- sealing ring, microscope base before 4-, 5- body tube, 6- focusing microscope base,
7-B piece pressing ring, 8- focusing cam, 9- cam pressing ring, 10-C piece pressing ring, 11- positive crescent moon lens A, 12- negative crescent moon lens B, 13-
Positive crescent moon lens C, 14- focusing motor, 15- microswitch frame, 16- microswitch.
Specific embodiment
As shown in Fig. 1 ~ 3, a kind of infrared lens with detachable-type sealed structure, including body tube 5, the body tube
5 front ends are equipped with preceding microscope base 4, are equipped with the focusing microscope base 6 that can be moved forward and backward in body tube 5；It is equipped with just in the preceding microscope base 4
Crescent moon lens A11 is equipped with negative crescent moon lens B12 in the focusing microscope base, and the primary mirror tube rear end is equipped with positive crescent moon lens
C13, by adjusting the front-rear position of negative crescent moon lens B12 come realize high/low temperature compensate；The positive crescent moon lens A and negative crescent moon are saturating
Airspace between mirror B is 35.42-37.42mm, and the airspace between the negative crescent moon lens B and positive crescent moon lens C is
16.68-18.68mm；It is provided with the sealing ring 3 positioned at the positive front end crescent moon lens A11 side in preceding microscope base 4, compresses sealing ring 3
Annular gasket 2 and the A piece pressing ring 1 for compressing annular gasket；It, can be to avoid across annular gasket between sealing ring and A piece pressing ring
Sealing ring causes sealing ring to fail due to being deformed by the power rotated in assembling process；This sealing means not only have
Good sealing can be good, reliable and stable, and convenient disassembly, eyeglass secondary can be replaced, be easy to subsequent and reprocess, and secondary work is suitble to
Industry, very good solution using sealant sealing there are the problem of.
In the present embodiment, the radius of curvature of the positive preceding mirror surface of crescent moon lens A11 and rear mirror surface be respectively 69.3mm and
96.2mm, with a thickness of 7mm, refractive index 4, material is germanium；It is 39.5mm that mirror surface, which is radius of curvature, before negative crescent moon lens B12, after
Mirror surface be it is aspherical, with a thickness of 4.2mm, refractive index 2.78, material is sulphur system；The positive preceding mirror surface of crescent moon lens C13 and rear mirror surface
Radius of curvature be respectively 47.6mm and 66.4mm, with a thickness of 3mm, refractive index 4, material is germanium.
In the present embodiment, the face type equation of the rear mirror surface of negative crescent moon lens B12 is as follows:
Z represents the position of optical axis direction, and r represents the height in the vertical direction of opposite optical axis, and c represents radius of curvature, and k represents circle
Bore coefficient, A2、A4、A6、A8、A10Represent asphericity coefficient；Wherein A2=-4.216E-05, A4=-1.188E-007, A6=
1.8937E-011 A8=-3.67E-014, A10=1.7115E-017, the E-n in asphericity coefficient represent "", such as-
4.216E-05 representative -4.21*10-5。
Following technical indicator has been reached by the optical system that above-mentioned lens set is constituted:
(1) service band: 8 μm -12 μm；
(2) focal length: f '=73mm；
(3) detector: 640 × 512,12 μm of LWIR Uncooled type；
(4) field angle: 6.0 ° × 4.8 °；
(5) relative aperture D/ f ': 1/1；.
Infrared lens of the present invention have many advantages, such as that compact-sized, light-weight, entire length is short, easy to carry, greatly reduce
The size of camera lens can be adapted to 640 × 512,14 μm of detectors of LWIR Uncooled, carry out document recording and monitoring is appointed
Business, and cost of manufacture is cheap, is suitble to large-scale production.
In the present embodiment, 5 middle part of body tube is outer is cased with focusing cam 8, and the focusing cam 8 passes through focusing guide pin
Focusing microscope base 6 is driven to be moved forward and backward, focusing guide pin is passed through from the straight-line groove on the curved groove and body tube on focusing cam；It is located at
The opposite two sides of focusing cam 8 are respectively arranged with focusing motor 14 and microswitch 15, the adjusting tooth focused on 14 main shaft of motor
Wheel is meshed with the outer gear ring of focusing cam 8, and focusing motor is fixed on motor rack, and motor rack is fixed on body tube, fine motion
Switch is directly anchored on body tube by microswitch frame, is contacted by the retaining screw being fixed on focusing cam with microswitch
And then focusing motor start and stop are controlled, realize the movement of limitation focusing microscope base；When work, is rotated forward by focusing motor or reversion is real
Now focusing microscope base forward or moves backward, and realizes the focusing of camera lens, during later period adjustment, motor rack convenient disassembly can
It realizes more compact construction, the layout of electronic original part can be completed in minimum space.
In the present embodiment, focusing microscope base uses three points centering principle, reduces the contact between focusing microscope base and body tube
Area reduces while reducing the weight of component and submits microscope base resistance in moving process, using stepped design, increases
The contact area of negative crescent moon lens B12 and focusing microscope base, guarantee the stability of installation.
In the present embodiment, the preceding microscope base 4 is interior, focusing microscope base 6 is interior and 5 rear end of body tube is respectively arranged with and heads on just
The hole rank of crescent moon lens A11, negative crescent moon lens B12 and positive crescent moon lens C13 three rear end outer edge；The interior setting of microscope base 6 of focusing
There is the B piece pressing ring 7 for pressing against negative crescent moon lens B12 front outer portion, 5 rear end of body tube, which is internally provided with, is pressing against positive crescent moon lens
The C piece pressing ring 10 in C13 front outer portion,；It is equipped with positioned at focusing cam rear end on the outside of body tube to fix focusing cam
The cam pressing ring 9 of axial position；A piece pressing ring, B piece pressing ring, C piece pressing ring and cam pressing ring are all made of with body tube and are threadedly coupled,
All places of being threadedly engaged point note shellac, the method help to improve the vibration resistance and resistance to punching of optical lens part on body tube
Performance is hit, the anti-seismic performance of whole camera lens is improved.
A kind of assembly method of the infrared lens with detachable-type sealed structure as described above, comprising the following steps: packet
It includes following steps: (1) positive crescent moon lens C being packed into primary mirror tube rear end, be then threaded into C piece pressing ring and be fixed；(2) it will adjust
Burnt microscope base connect with body tube and focusing cam and screws on the axial position that cam pressing ring limits focusing cam by guide pin of focusing
It sets；(3) negative crescent moon lens B is fitted into focusing microscope base, and is fixed by screwing in B piece pressing ring；(4) using screw will before
Microscope base is fixedly mounted on body tube front end, before positive crescent moon lens A is fitted into microscope base and according to this loading sealing ring, annular gasket and
A piece pressing ring is fixed.
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.
If the present invention is open or relates to the components or structural member of connection fastened to each other, unless otherwise stated,
It is fixedly connected it is to be understood that connection (such as connecting using bolt or screw) can be removedly fixed, it is understood that are as follows:
It is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure (such as make
Manufactured with casting technique is integrally formed) replaced (obviously can not be using except integrally formed technique).
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 lens with detachable-type sealed structure, it is characterised in that: including body tube, the body tube front end
Preceding microscope base is installed, the focusing microscope base that can be moved forward and backward is installed in body tube；Positive crescent moon lens are installed in the preceding microscope base
A is equipped with negative crescent moon lens B in the focusing microscope base, and the primary mirror tube rear end is equipped with positive crescent moon lens C；The positive crescent moon
Airspace between lens A and negative crescent moon lens B is 35.42-37.42mm, the negative crescent moon lens B and positive crescent moon lens C
Between airspace be 16.68-18.68mm；Be provided in preceding microscope base the sealing ring positioned at the positive front end crescent moon lens A side,
It compresses the annular gasket of sealing ring and compresses the A piece pressing ring of annular gasket.
2. the infrared lens according to claim 1 with detachable-type sealed structure, it is characterised in that: the positive crescent moon
The radius of curvature of the preceding mirror surface of lens A and rear mirror surface is respectively 69.3mm and 96.2mm, with a thickness of 7mm；Mirror surface before negative crescent moon lens B
Be 39.5mm for radius of curvature, rear mirror surface be it is aspherical, with a thickness of 4.2mm；The curvature of positive crescent moon lens C preceding mirror surface and rear mirror surface
Radius is respectively 47.6mm and 66.4mm, with a thickness of 3mm.
3. the infrared lens according to claim 1 with detachable-type sealed structure, it is characterised in that: the body tube
Focusing cam is cased with outside middle part, the focusing cam drives focusing microscope base to be moved forward and backward by focusing guide pin；Positioned at focusing cam
Opposite two sides are respectively arranged with focusing motor and microswitch, outside the adjustment gear and focusing cam on focusing electric machine main shaft
Gear ring is meshed.
4. the infrared lens according to claim 3 with detachable-type sealed structure, it is characterised in that: the preceding microscope base
In interior, focusing microscope base and primary mirror tube rear end is respectively arranged with and heads on positive crescent moon lens A, negative crescent moon lens B and positive crescent moon lens C
The hole rank of three rear end outer edge；The B piece pressing ring for pressing against negative crescent moon lens B front outer portion, primary mirror are provided in focusing microscope base
Tube rear end is internally provided with the C piece pressing ring for pressing against positive crescent moon lens C front outer portion；It is equipped on the outside of body tube convex positioned at focusing
Take turns cam pressing ring of the rear end to fix focusing cam axial position.
5. a kind of assembly method of the infrared lens with detachable-type sealed structure as claimed in claim 3, it is characterised in that:
The following steps are included: positive crescent moon lens C is packed into primary mirror tube rear end by (1), it is then threaded into C piece pressing ring and is fixed；(2) will
Focusing microscope base connect with body tube and focusing cam and screws on the axial direction that cam pressing ring limits focusing cam by guide pin of focusing
Position；(3) negative crescent moon lens B is fitted into focusing microscope base, and is fixed by screwing in B piece pressing ring；(4) utilize screw will
Preceding microscope base is fixedly mounted on body tube front end, and positive crescent moon lens A is fitted into preceding microscope base and is packed into sealing ring, annular gasket according to this
It is fixed with A piece pressing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910595194.7A CN110261982A (en) | 2019-07-03 | 2019-07-03 | Infrared lens and its assembly method with detachable-type sealed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910595194.7A CN110261982A (en) | 2019-07-03 | 2019-07-03 | Infrared lens and its assembly method with detachable-type sealed structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110261982A true CN110261982A (en) | 2019-09-20 |
Family
ID=67924109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910595194.7A Pending CN110261982A (en) | 2019-07-03 | 2019-07-03 | Infrared lens and its assembly method with detachable-type sealed structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113103160A (en) * | 2021-04-08 | 2021-07-13 | 中国科学院光电技术研究所 | Circular symmetry circumferential pre-tightening device for flexible thin film |
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