CN109471250B - Manual-adjustment type long-wave infrared lens with doubling structure and assembly method thereof - Google Patents
Manual-adjustment type long-wave infrared lens with doubling structure and assembly method thereof Download PDFInfo
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- CN109471250B CN109471250B CN201811617463.7A CN201811617463A CN109471250B CN 109471250 B CN109471250 B CN 109471250B CN 201811617463 A CN201811617463 A CN 201811617463A CN 109471250 B CN109471250 B CN 109471250B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
- G02B15/04—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by changing a part
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
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- 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
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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Abstract
The invention relates to a manual-adjustment type long-wave infrared lens with a doubling structure and an assembly method thereof, the manual-adjustment type long-wave infrared lens comprises a basic lens and three zoom lenses, the basic lens comprises a main lens barrel, a lens seat is arranged in a rear cavity of the main lens barrel, a negative lens A, a negative lens B and a positive lens C are sequentially arranged in the lens seat from front to back along a light incidence direction, a limit screw used for being connected with an L-shaped groove arranged on the zoom lens is radially arranged in the front cavity of the main lens barrel in a penetrating manner and positioned at the lower side of a cam, axial glass bead screws are arranged on the side wall of the front cavity of the main lens barrel at intervals along the circumferential direction, a cam is sleeved outside the main lens barrel, a focusing ring is arranged outside the cam, and a connecting seat is also arranged at the rear end of the main lens barrel. The manual-adjustment type long-wave infrared lens with the multiplication structure is compact in structure, and the multiplication lens can be replaced, so that the detection range is wide, and the assembly is simple and convenient.
Description
Technical Field
The invention relates to a manual-adjusting type long-wave infrared lens with a doubling structure and an assembly method thereof.
Background
With the development of scientific technology, infrared imaging technology has been widely used in the fields of national defense, industry, medical treatment, etc. The infrared detection has certain capabilities of penetrating smoke, fog, haze, snow and the like and identifying camouflage, is not interfered by strong light and flash of a battlefield, can realize long-distance all-weather observation, and is particularly suitable for target detection at night and under bad weather conditions.
The temperature not only can influence the refractive index of the optical material, but also can cause thermal expansion and cold contraction to the lens barrel material, so that the focal power change and the optimal image plane are offset. The optical imaging quality is reduced, the image is blurred, the contrast is reduced, and the imaging performance of the lens is finally affected.
Disclosure of Invention
The invention aims to provide a manual-adjusting type long-wave infrared lens with a doubling structure and an assembly method thereof, which have compact structures, and the doubling lens can be replaced to ensure that the detection range is wide and the assembly is simple and convenient.
The technical scheme of the invention is as follows: the utility model provides a take manual formula long wave infrared lens of multiplying structure, includes basic mirror and three zoom mirror, basic mirror includes the main lens cone, be provided with the mirror base in the rear portion cavity of main lens cone, negative lens A, negative lens B, positive lens C have been set gradually from the front to the back along light incident direction in the mirror base, the lateral wall of main lens cone front portion cavity is provided with axial glass bead screw along circumference interval, and main lens cone overcoat has been put the cam, be provided with the focusing ring outward the cam, the rear end of main lens cone still is provided with the connecting seat, and the front portion cavity of main lens cone is located the radial stop screw that is used for being connected with the L type groove that sets up on the zoom mirror that wears to be equipped with of downside of cam.
Further, guide nails with the upper ends connected with the cams and the lower ends connected with the lens base are radially arranged on the main lens barrel in a penetrating mode, annular protruding portions used for limiting the negative lens A are arranged at the front ends of the lens base, first space rings are arranged between the negative lens A and the negative lens B in the lens base, second space rings are arranged between the negative lens B and the positive lens C in the lens base, and rear pressing rings used for limiting the positive lens C are connected to the rear ends of the lens base in a threaded mode.
Further, the air space between the negative lens a and the negative lens B is 3.3mm, and the air space between the negative lens B and the positive lens C is 4.6mm.
Further, the three variable magnification lenses are respectively 12-degree magnification lens, 7-degree magnification lens and 46-degree magnification lens.
Further, the 12-degree power mirror comprises a first power-changing mirror seat with a horn-shaped inner cavity, a negative lens D and a negative lens E are arranged in the first power-changing mirror seat from front to back along the incidence direction of light, and the air interval between the negative lens D and the negative lens E is 20.3mm.
Further, a step surface for abutting against the periphery of the rear side surface of the negative lens D is arranged in the first zoom lens seat, a first pressing ring for abutting against the periphery of the front side surface of the negative lens D is arranged in the zoom lens seat, an annular protruding portion for abutting against the periphery of the rear side surface of the negative lens E is arranged at the rear end of the first zoom lens seat, a second pressing ring for locking the negative lens E is arranged at the rear portion of the first zoom lens seat, and the L-shaped groove is formed in the outer side wall of the rear portion of the first zoom lens seat.
Further, the 7-degree magnifier comprises a magnifier seat with an inner cavity in an hourglass shape, a positive lens F, a positive lens G, a negative lens H and a positive lens I are sequentially arranged in the magnifier seat from front to back along the light incidence direction, the positive lens F, the positive lens G and the negative lens H are positioned in the front cavity, the air interval between the positive lens F and the positive lens G is 19.8mm, the air interval between the positive lens G and the negative lens H is 0.5mm, and the air interval between the negative lens H and the positive lens I is 31.8mm.
Further, a third pressing ring for abutting against the peripheral part of the front side of the positive lens F is arranged in the doubling lens seat, a third spacing ring is arranged between the positive lens F and the positive lens G in the doubling lens seat, a fourth spacing ring is arranged between the positive lens G and the negative lens H in the doubling lens seat, a limiting step surface for abutting against the peripheral part of the rear side of the negative lens H is arranged in the doubling lens seat, a fourth pressing ring for locking the positive lens I is arranged in a rear cavity of the doubling lens seat, and the L-shaped groove is formed in the outer side wall of the rear part of the doubling lens seat.
Further, the 46-degree power mirror comprises a second power-changing mirror seat with an I-shaped appearance, a negative lens J and a positive lens K are sequentially arranged in the second power-changing mirror seat from front to back in the light incidence direction, the air interval between the negative lens J and the positive lens K is 25mm, a fifth pressing ring used for being in butt joint with the peripheral part of the front side face of the negative lens J is arranged in the second power-changing mirror seat, a fifth spacing ring is arranged between the negative lens J and the positive lens K in the second power-changing mirror seat, an annular convex part used for being in butt joint with the peripheral part of the rear side face of the positive lens K is arranged in a rear cavity of the second power-changing mirror seat, and an L-shaped groove is formed in the outer side wall of the rear part of the second power-changing mirror seat.
The assembling method for the manual long-wave infrared lens with the doubling structure comprises the following steps:
1) The L-shaped groove on the zoom lens corresponds to the limit screw;
2) Inserting the rear end of the zoom lens into a front cavity of the main lens barrel;
3) Rotating the zoom lens to complete the connection of the zoom lens.
Compared with the prior art, the invention has the following advantages: compact structure, changeable multiple mirrors, wide detection range, economical and practical use of a set of basic mirrors with multiple mirrors, manual focusing, etc. The infrared detector can be matched with a long-wave infrared uncooled 384×288 17 μm detector to perform live recording and monitoring tasks, has low manufacturing cost and is suitable for large-scale production.
Drawings
FIG. 1 is a schematic view of the mechanical structure of an optical lens of a basic mirror according to the present invention;
FIG. 2 is a schematic diagram of an optical system of a base mirror of the present invention;
FIG. 3 is a schematic view of the basic mirror of the present invention;
FIG. 4 is a schematic view of the mechanical structure of the 7-degree magnifier of the present invention;
FIG. 5 is a schematic view of an optical system of a 7 deg. magnifier according to the present invention;
FIG. 6 is a schematic view of the basic mirror of the present invention after 7-degree magnification lens assembly;
FIG. 7 is a schematic view of the mechanical structure of a 12 deg. magnifier according to the present invention;
FIG. 8 is a schematic diagram of an optical system of a 12 magnification lens of the present invention;
FIG. 9 is a schematic view of the basic mirror of the present invention after 12 ° magnification lens is installed;
FIG. 10 is a schematic view of the mechanical structure of the 46 degree magnifier of the present invention;
FIG. 11 is a schematic view of an optical system of a 46 magnification lens of the present invention;
FIG. 12 is a schematic view of the basic mirror of the present invention after 46 ° magnification lens is installed;
FIG. 13 is a view showing the attachment and detachment of the magnifying glass mounting groove of the present invention;
FIG. 14 is a view showing the usage state of the magnifying glass mounting groove of the present invention;
in the figure: a-negative lens A, B-negative lens B, C-positive lens C, D-positive lens D, E-negative lens E, F-positive lens, G-positive lens, H-negative lens, I-positive lens I, J-negative lens J, K-positive lens K,1-12 DEG magnifier, 2-7 DEG magnifier, 3-46 DEG magnifier, 4-main lens barrel, 5-focusing ring, 6-connecting seat, 7-lens seat, 8-back pressing ring, 9-second spacing ring, 10-guide pin, 11-cam, 12-glass bead screw, 13-spacing screw, 14-first spacing ring; 15-a first clamping ring, 16-a step surface, 17-a first variable power lens seat, 18-an annular convex part and 19-a second clamping ring; 20-third pressing ring, 22-third spacing ring, 24-fourth spacing ring, 25-fourth pressing ring, 26-limit step surface, 27-doubling lens base, 29-fifth pressing ring, 31-fifth spacing ring, 32-annular convex part, 33-second doubling lens base and 34-L-shaped groove.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Referring to fig. 1 to 14
The utility model provides a take manual formula long wave infrared lens of multiplication structure, includes basic mirror and three zoom mirror, basic mirror includes main lens cone 3, be provided with mirror mount 6 in the rear portion cavity of main lens cone, negative lens A, negative lens B, positive lens C have been set gradually from the front to the back along the light incident direction in the mirror mount, the lateral wall of main lens cone front portion cavity is provided with axial glass bead screw 12 along circumference interval three to guarantee entire system's stability. The main lens barrel is sleeved with the cam 11, the focusing ring 4 is arranged outside the cam, objects with different object distances are focused by manually rotating the focusing ring, the focusing ring is a rubber die, and the surface of the focusing ring is provided with a pattern drawing treatment, so that the focusing hand feeling is ensured. The rear end of the main lens barrel is also provided with a connecting seat 5 so as to be connected with a camera. The front cavity of the main lens barrel is radially penetrated with a limit screw 13 which is used for being connected with an L-shaped groove 34 arranged on each zoom lens and positioned at the lower side of the cam 11, and the limit screw and the L-shaped groove on the zoom lens meet the path movement during disassembly and assembly of the zoom lens so as to finish connection with the base lens by manually rotating the zoom lens.
In this embodiment, the bead screw retracts when the bead is stressed and rebounds when the pressure is removed.
In this embodiment, the guide pin 10 with the upper end connected with the cam and the lower end connected with the lens base is radially arranged on the main lens barrel in a penetrating manner, so that focusing stability is ensured. The front end of the lens seat is provided with an annular convex part for limiting the negative lens A, a first spacing ring 14 is arranged between the negative lens A and the negative lens B in the lens seat, a second spacing ring 9 is arranged between the negative lens B and the positive lens C in the lens seat, and the rear end of the lens seat is in threaded connection with a rear pressing ring 7 for limiting the positive lens C.
In this embodiment, the air space between the negative lens a and the negative lens B is 3.3mm, and the air space between the negative lens B and the positive lens C is 4.6mm.
In the embodiment, on the premise of ensuring compact structure, the vibration and impact resistance of the lens is improved, and the cam focusing structure is adopted to ensure the use requirement of the system.
In this embodiment, the optical structure formed by the lens groups achieves the following optical indexes:
working wave band: 8 μm to 12 μm;
focal length: f' =15 mm;
the detector comprises: long wave infrared uncooled 384×288, 17 μm;
angle of view: 25 ° ×19°;
relative pore diameter D/f': 1/1; .
In this embodiment, the three variable power mirrors are 12 ° power mirror 1, 7 ° power mirror 2, and 46 ° power mirror 3, respectively.
In this embodiment, the 12 ° magnifier includes a first variable magnification lens base 17 having a horn-shaped inner cavity, a negative lens D and a negative lens E are disposed in the first variable magnification lens base from front to back along the light incident direction, and an air space between the negative lens D and the negative lens E is 20.3mm.
In this embodiment, the first zoom lens seat is provided with a step surface 16 for abutting against the peripheral portion of the rear side surface of the negative lens D, the zoom lens seat is provided with a first clamping ring 15 for abutting against the peripheral portion of the front side surface of the negative lens D, the rear end of the first zoom lens seat is provided with an annular convex portion 18 for abutting against the peripheral portion of the rear side surface of the negative lens E, the rear portion of the first zoom lens seat is provided with a second clamping ring 19 for locking the negative lens E, and the L-shaped groove is provided on the outer side wall of the rear portion of the first zoom lens seat.
In this embodiment, the 7 ° magnifier includes a magnifier base 27 whose inner cavity is in an hourglass shape, and a positive lens F, a positive lens G, a negative lens H and a positive lens I positioned in the front cavity are sequentially disposed in the magnifier base from front to back along the light incident direction, the air space between the positive lens F and the positive lens G is 19.8mm, the air space between the positive lens G and the negative lens H is 0.5mm, and the air space between the negative lens H and the positive lens I is 31.8mm.
In this embodiment, a third pressing ring 20 for abutting against the front side periphery of the positive lens F is disposed in the doubling lens holder, a third spacer 22 is disposed between the positive lens F and the positive lens G in the doubling lens holder, a fourth spacer 24 is disposed between the positive lens G and the negative lens H in the doubling lens holder, a limiting step surface 26 for abutting against the periphery of the rear side of the negative lens H is disposed in the doubling lens holder, a fourth pressing ring 25 for locking the positive lens I is disposed in a rear cavity of the doubling lens holder, and an L-shaped groove is disposed on the outer side wall of the rear portion of the doubling lens holder.
In this embodiment, the 46 ° magnifier includes a second zoom lens seat 33 with an i-shaped outer shape, a negative lens J and a positive lens K are sequentially disposed in the second zoom lens seat from front to back in the light incident direction, an air space between the negative lens J and the positive lens K is 25mm, a fifth pressing ring 29 for abutting against the peripheral portion of the front side surface of the negative lens J is disposed in the second zoom lens seat, a fifth spacer ring 31 is disposed between the negative lens J and the positive lens K in the second zoom lens seat, an annular convex portion 32 for abutting against the peripheral portion of the rear side surface of the positive lens K is disposed in a rear cavity of the second zoom lens seat, and an L-shaped groove is disposed on the outer side wall of the rear portion of the second zoom lens seat.
In this embodiment, specific parameters of each lens are as follows:
the assembling method for the manual long-wave infrared lens with the doubling structure comprises the following steps:
1) The L-shaped groove on the zoom lens corresponds to the limit screw, so that the limit screw is positioned in the middle of the L-shaped groove;
2) Inserting the rear end of the zoom lens into a front cavity of the main lens barrel;
3) The zoom lens is connected with the basic lens by rotating the zoom lens, and after the installation is completed, the glass bead screw rebounds to enable the limit screw to be mutually extruded with the inner wall of the L-shaped groove, so that the zoom lens is fixed.
The foregoing is only illustrative of the present invention, and it will be apparent to those skilled in the art from this disclosure that, when designing a manual long-wave infrared lens with a doubling structure and its assembly method according to the teachings of the present invention, no inventive effort is required, and equivalent changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention.
Claims (8)
1. The hand-tuning type long-wave infrared lens with the doubling structure comprises a basic lens and three zooming lenses, and is characterized in that the basic lens comprises a main lens barrel, a lens seat is arranged in a rear cavity of the main lens barrel, a negative lens A, a negative lens B and a positive lens C are sequentially arranged in the lens seat from front to back along the incidence direction of light rays, axial bead screws are arranged on the side wall of a front cavity of the main lens barrel at intervals along the circumferential direction, a cam is sleeved outside the main lens barrel, a focusing ring is arranged outside the cam, a connecting seat is also arranged at the rear end of the main lens barrel, and a limit screw used for being connected with an L-shaped groove arranged on the zooming lens is radially arranged in the front cavity of the main lens barrel in a penetrating manner and is positioned at the lower side of the cam; the total number of lenses of the basic lens with diopter is 3; the air interval between the negative lens A and the negative lens B is 3.3mm, and the air interval between the negative lens B and the positive lens C is 4.6mm; the three zoom lenses are respectively 12-degree magnifier, 7-degree magnifier and 46-degree magnifier.
2. The hand-tuning type long-wave infrared lens with the doubling structure according to claim 1, wherein guide pins with the upper end connected with a cam and the lower end connected with a lens seat are radially arranged on the main lens barrel in a penetrating manner, an annular convex part used for limiting a negative lens A is arranged at the front end of the lens seat, a first space ring is arranged between the negative lens A and a negative lens B in the lens seat, a second space ring is arranged between the negative lens B and a positive lens C in the lens seat, and a rear pressing ring used for limiting the positive lens C is connected at the rear end of the lens seat in a threaded manner.
3. The hand-operated long-wave infrared lens with the doubling structure according to claim 1, wherein the 12-degree doubling lens comprises a first variable-magnification lens seat with a horn-shaped inner cavity, a negative lens D and a negative lens E are arranged in the first variable-magnification lens seat from front to back along the light incidence direction, and an air interval between the negative lens D and the negative lens E is 20.3mm.
4. The hand-operated long-wave infrared lens with a doubling structure according to claim 3, wherein a step surface for abutting against the periphery of the rear side surface of the negative lens D is arranged in the first zoom lens seat, a first pressing ring for abutting against the periphery of the front side surface of the negative lens D is arranged in the zoom lens seat, an annular protruding part for abutting against the periphery of the rear side surface of the negative lens E is arranged at the rear end of the first zoom lens seat, a second pressing ring for locking the negative lens E is arranged at the rear part of the first zoom lens seat, and the L-shaped groove is arranged on the outer side wall of the rear part of the first zoom lens seat.
5. The hand-tuning type long-wave infrared lens with the doubling structure according to claim 1, wherein the 7-degree doubling lens comprises a doubling lens seat with an hourglass-shaped inner cavity, a positive lens F, a positive lens G, a negative lens H and a positive lens I are sequentially arranged in the doubling lens seat from front to back along the light incidence direction, the positive lens F, the positive lens G and the negative lens H are positioned in a front cavity, the air interval between the positive lens F and the positive lens G is 19.8mm, the air interval between the positive lens G and the negative lens H is 0.5mm, and the air interval between the negative lens H and the positive lens I is 31.8mm.
6. The hand-tuning type long-wave infrared lens with the doubling structure according to claim 5, wherein a third pressing ring used for being abutted against the periphery of the front side of the positive lens F is arranged in the doubling lens seat, a third spacing ring is arranged between the positive lens F and the positive lens G in the doubling lens seat, a fourth spacing ring is arranged between the positive lens G and the negative lens H in the doubling lens seat, a limiting step surface used for being abutted against the periphery of the rear side of the negative lens H is arranged in the doubling lens seat, a fourth pressing ring used for locking the positive lens I is arranged in a rear cavity of the doubling lens seat, and the L-shaped groove is formed in the outer side wall of the rear part of the doubling lens seat.
7. The hand-tuning type long-wave infrared lens with the multiplication structure according to claim 1, wherein the 46-degree multiplication mirror comprises a second multiplication mirror seat with an I-shaped appearance, a negative lens J and a positive lens K are sequentially arranged in the second multiplication mirror seat from front to back in the incidence direction of light rays, an air interval between the negative lens J and the positive lens K is 25mm, a fifth pressing ring used for being in butt joint with the periphery of the front side surface of the negative lens J is arranged in the second multiplication mirror seat, a fifth spacing ring is arranged between the negative lens J and the positive lens K in the second multiplication mirror seat, an annular convex part used for being in butt joint with the periphery of the rear side surface of the positive lens K is arranged in a rear cavity of the second multiplication mirror seat, and the L-shaped groove is arranged on the outer side wall of the rear part of the second multiplication mirror seat.
8. An assembling method for a manual-adjusting long-wave infrared lens with a doubling structure, which is applied to the invention in claim 1 or 2, and is characterized by comprising the following steps:
1) The L-shaped groove on the zoom lens corresponds to the limit screw;
2) Inserting the rear end of the zoom lens into a front cavity of the main lens barrel;
3) Rotating the zoom lens to complete the connection of the zoom lens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811617463.7A CN109471250B (en) | 2018-12-28 | 2018-12-28 | Manual-adjustment type long-wave infrared lens with doubling structure and assembly method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811617463.7A CN109471250B (en) | 2018-12-28 | 2018-12-28 | Manual-adjustment type long-wave infrared lens with doubling structure and assembly method thereof |
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| CN109471250A CN109471250A (en) | 2019-03-15 |
| CN109471250B true CN109471250B (en) | 2023-06-06 |
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| CN114740609B (en) * | 2022-03-07 | 2024-03-29 | 嘉兴中润光学科技股份有限公司 | Front-mounted doubling mirror and imaging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07174967A (en) * | 1993-12-21 | 1995-07-14 | Sony Corp | Variable power lens system, main variable power lens system, and finder optical system of variable power lens |
| JP4712357B2 (en) * | 2003-11-26 | 2011-06-29 | オリンパス株式会社 | Magnification lens and imaging apparatus using the same |
| JP6287242B2 (en) * | 2014-01-20 | 2018-03-07 | 株式会社ニコン | Amphibious zoom lens and imaging device |
| CN106054363B (en) * | 2016-07-26 | 2018-06-15 | 福建福光股份有限公司 | High zoom ratio medium wave infrared continuous zoom lens and its method of work |
| CN107561672A (en) * | 2017-10-21 | 2018-01-09 | 福建福光天瞳光学有限公司 | F15mm machineries passive type is without thermalization camera lens and its assembly method |
| CN108508582A (en) * | 2018-03-23 | 2018-09-07 | 中国科学院西安光学精密机械研究所 | A kind of infrared double spectrum syntype zoom camera lenses |
| CN209343034U (en) * | 2018-12-28 | 2019-09-03 | 福建福光天瞳光学有限公司 | A kind of band doubles the hand-adjusting type LONG WAVE INFRARED camera lens of structure |
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