CN112114415B - Medium wave motor focusing infrared lens and assembly method thereof - Google Patents
Medium wave motor focusing infrared lens and assembly method thereof Download PDFInfo
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- CN112114415B CN112114415B CN202011049176.8A CN202011049176A CN112114415B CN 112114415 B CN112114415 B CN 112114415B CN 202011049176 A CN202011049176 A CN 202011049176A CN 112114415 B CN112114415 B CN 112114415B
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- lens
- positive lens
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- lens barrel
- motor
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 238000005057 refrigeration Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lens Barrels (AREA)
Abstract
The utility model provides an infrared lens of medium wave motor focusing, includes the lens cone, positive lens A, positive lens B and positive lens C have been set gradually from left to right along light incident direction in the lens cone, positive lens A and positive lens B's air interval is 4.7mm, positive lens B and positive lens C's air interval is 21.64mm. The invention also discloses an assembly method of the medium wave motor focusing infrared lens. The invention has reasonable design, compact structure, moderate structural length of the lens, stable optical axis without deviation in the focusing process and high transmittance. In the optical design, the device can be matched with a 320×256 30 μm detector for medium-wave infrared refrigeration, can perform live recording and monitoring tasks, is simple in assembly, and is suitable for mass production.
Description
Technical Field
The invention relates to a medium wave motor focusing infrared lens 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.
But 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, the imaging performance of the lens is finally influenced, but the offset of the imaging plane caused by the temperature change can be compensated through motor focusing; meanwhile, when the lens monitors objects with different distances, the optimal image surfaces are not on the same surface when the objects with different distances are imaged through the lens, so that image blurring is caused; objects with different distances can be imaged on the same surface through the lens in a lens focusing mode.
Disclosure of Invention
The invention aims to provide a medium wave motor focusing infrared lens and an assembly method thereof, wherein the lens has clear imaging and simple structure.
The technical scheme of the invention is as follows: the utility model provides an infrared lens of medium wave motor focusing, includes the lens cone, positive lens A, positive lens B and positive lens C have been set gradually from left to right along light incident direction in the lens cone, positive lens A and positive lens B's air interval is 4.7mm, positive lens B and positive lens C's air interval is 21.64mm.
Further, the lens barrel comprises a main lens barrel and a focusing lens barrel sliding in the main lens barrel, a guide assembly is arranged on the outer side of the main lens barrel, and an electric assembly is arranged at the right end of the focusing lens barrel.
Further, the positive lens C is arranged in the focusing lens barrel, a C-piece pressing ring for fixing the positive lens C in the focusing lens barrel is arranged on the left side of the positive lens C, the positive lens A and the positive lens B are arranged in the main lens barrel, an A-piece pressing ring for fixing the positive lens A in the main lens barrel is arranged on the left side of the positive lens A, and an AB spacer for fixing the positive lens B in the main lens barrel is arranged on the left side of the positive lens B.
Further, a plurality of ventilation grooves are formed in the outer cylinder wall of the focusing lens barrel.
Further, the guide assembly comprises a guide sleeve sleeved on the main lens barrel, at least one guide groove is formed in the guide sleeve, at least one sliding groove is formed in the wall of the main lens barrel, guide nails are arranged in the guide grooves, and the guide nails penetrate through the sliding grooves and are fixed on the focusing lens barrel.
Further, the electric assembly comprises a connecting flange arranged at the right end of the main lens cone, a motor frame is arranged on the outer side wall of the connecting flange, a motor is arranged on the motor frame, a motor gear is arranged at the tail end of an output shaft of the motor, and a guide sleeve gear meshed with the motor gear is arranged on the outer side of the guide sleeve.
Further, a micro-switch flange is arranged between the main lens barrel and the connecting flange, and two micro-switches are arranged on the outer side wall of the micro-switch flange.
Further, a plurality of adjusting grooves are uniformly distributed on the connecting flange along the circumferential direction, and a plurality of adjusting grooves are uniformly distributed on the microswitch flange along the circumferential direction.
An assembly method based on a medium wave motor focusing infrared lens comprises the following steps:
(1) Sequentially fixing and connecting the main lens cone, the focusing lens cone and the guide sleeve by using guide nails;
(2) Installing a microswitch flange and a connecting flange at the right end of the main lens barrel;
(3) The micro-switch is respectively arranged on the micro-switch flange;
(4) Locking the motor to a motor bracket of the connecting flange;
(5) Fixing a motor gear on an output shaft of a motor by using AB glue;
(6) The positive lens C is placed horizontally on the focusing carriage and fixed with a C-plate press ring:
(7) The positive lens B is horizontally assembled into the main lens barrel and is fixed by an AB spacer ring;
(8) The positive lens A is horizontally assembled into the main lens barrel, waterproof silica gel is smeared, and the positive lens A is fixed by an A-piece pressing ring.
Compared with the prior art, the invention has the following advantages: the invention has reasonable design, compact structure, moderate structural length of the lens, stable optical axis without deviation in the focusing process and high transmittance. In the optical design, the device can be matched with a 320×256 30 μm detector for medium-wave infrared refrigeration, can perform live recording and monitoring tasks, is simple in assembly, and is suitable for mass production.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the external structure of the present invention;
FIG. 3 is a schematic diagram of an optical system according to the present invention;
In the figure: the lens comprises a main lens barrel 1, a sheet-A pressing ring 2, a guide sleeve gear 3, a guide pin 4, a micro-switch flange 5, a connecting flange 6, a positive lens C7, a focusing lens barrel 8, a sheet-C pressing ring 9, a positive lens B10, an AB spacer ring 11, a positive lens A12, a motor gear 13, a motor 14 and a micro-switch 15.
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.
Reference is made to fig. 1-3.
In a preferred embodiment of the present invention: the utility model provides an infrared lens of medium wave motor focusing, includes the lens cone, positive lens A, positive lens B and positive lens C have been set gradually from left to right along light incident direction in the lens cone, positive lens A and positive lens B's air interval is 4.7mm, positive lens B and positive lens C's air interval is 21.64mm.
In this embodiment, the lens barrel includes a main lens barrel and a focusing lens barrel sliding in the main lens barrel, a guiding component is provided on the outer side of the main lens barrel, an electric component is provided on the right end of the focusing lens barrel, and the focusing lens barrel can move back and forth in the main lens barrel under the combined action of the guiding component and the electric component.
In this embodiment, the positive lens C is disposed in the focusing lens barrel, a C-plate pressing ring for fixing the positive lens C in the focusing lens barrel is disposed on the left side of the positive lens C, the positive lens a and the positive lens B are disposed in the main lens barrel, an a-plate pressing ring for fixing the positive lens a in the main lens barrel is disposed on the left side of the positive lens a, an AB spacer for fixing the positive lens B in the main lens barrel is disposed on the left side of the positive lens B, and a waterproof silica gel is coated at the joint of the positive lens a and the main lens barrel.
In this embodiment, set up a plurality of ventilation grooves on the outer section of thick bamboo wall of focusing lens cone, when focusing lens cone carries out back and forth movement, can not lead to the interior atmospheric pressure of main lens cone too big and the condition that the focusing lens cone kick-backs appears, also alleviateed the weight of focusing lens cone simultaneously, reduced the wearing and tearing of guide assembly and electric assembly, prolonged its life-span.
In this embodiment, the guide assembly includes the guide pin bushing of cover on the main lens barrel, be provided with at least one guide slot on the guide pin bushing, be provided with at least one spout on the section of thick bamboo wall of main lens barrel, be provided with the guide pin in the guide slot, the guide pin passes the spout and is fixed in on the focusing lens barrel, through rotating the guide pin bushing, can order about the guide pin and reciprocate in the spout to drive the focusing lens barrel and reciprocate in the main lens barrel, guarantee simultaneously that focusing process lens optical axis only reciprocates, avoid the lens optical axis to produce big skew in the removal in-process.
In this embodiment, the electric assembly includes the flange that sets up in main lens cone right-hand member, flange's lateral wall is provided with the motor frame, be provided with the motor in the motor frame, the output shaft end of motor is provided with motor gear, the guide pin bushing outside is provided with the guide pin bushing gear with motor gear engaged with, the motor drives motor gear drive guide pin bushing gear rotation for the guide pin bushing is rotatory, drives focusing lens cone back and forth movement, in order to realize the switching of camera lens focus visual field.
In this embodiment, be provided with the micro-gap switch flange between main lens barrel and the flange, the lateral wall of micro-gap switch flange is provided with two micro-gap switches, the right-hand member of guide pin bushing is provided with the contact, the contact cooperatees with the micro-gap switch, and after the guide pin bushing rotated certain angle, the contact touched the micro-gap switch, closed the motor to the rotation angle of restriction guide pin bushing and focusing lens barrel's displacement of removing avoid the overrange.
In this embodiment, a plurality of adjustment grooves are evenly distributed along the circumferential direction on the connecting flange, a plurality of adjustment grooves are evenly distributed along the circumferential direction on the micro-gap switch flange, the motor on the connecting flange can be prevented from interfering with other components in the machine core through adjustment of the adjustment grooves, interference between the connecting flange and the micro-gap switch flange can be avoided, and assembly difficulty and machining precision errors of electrical components are reduced.
An assembly method based on a medium wave motor focusing infrared lens comprises the following steps:
(1) Sequentially fixing and connecting the main lens cone, the focusing lens cone and the guide sleeve by using guide nails;
(2) Installing a microswitch flange and a connecting flange at the right end of the main lens barrel;
(3) The micro-switch is respectively arranged on the micro-switch flange;
(4) Locking the motor to a motor bracket of the connecting flange;
(5) Fixing a motor gear on an output shaft of a motor by using AB glue;
(6) The positive lens C is placed horizontally on the focusing carriage and fixed with a C-plate press ring:
(7) The positive lens B is horizontally assembled into the main lens barrel and is fixed by an AB spacer ring;
(8) The positive lens A is horizontally assembled into the main lens barrel, waterproof silica gel is smeared, and the positive lens A is fixed by an A-piece pressing ring.
In this embodiment, specific performance parameters of the optical structure are: (1) operating band: 3.2 μm-3.4 μm; (2) focal length: f' =45 mm; (3) a detector: long wave infrared non-refrigeration 320 x 256, 30 μm; (4) angle of view: 12 ° ×9.6°; (5) relative pore diameter D/f': 1/2.
In this embodiment, the parameters of the positive lens a, the positive lens B, and the positive lens C are as follows:
note that: in table 1, the radius of curvature refers to the radius of curvature of each surface of the lens, and the air gap refers to the distance between two adjacent lenses, as illustrated: s1, S2 are the surfaces of the positive lens a that are distant from and adjacent to the positive lens B, respectively.
The foregoing is only illustrative of the preferred embodiments of the present invention, and it will be apparent to those skilled in the art from this disclosure that, based on the teachings herein, various forms of medium wave motor focusing infrared lens and its assembly method can be devised without the need for inventive faculty, and equivalent changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention.
Claims (1)
1. The assembling method of the medium wave motor focusing infrared lens comprises a lens barrel, and is characterized in that a positive lens A, a positive lens B and a positive lens C are sequentially arranged in the lens barrel from left to right along the incidence direction of light, the air interval between the positive lens A and the positive lens B is 4.7mm, and the air interval between the positive lens B and the positive lens C is 21.64mm;
The lens cone comprises a main lens cone and a focusing lens cone sliding in the main lens cone, a guide assembly is arranged on the outer side of the main lens cone, and an electric assembly is arranged at the right end of the focusing lens cone;
A plurality of ventilation grooves are formed in the outer cylinder wall of the focusing lens cone;
The guide assembly comprises a guide sleeve sleeved on the main lens barrel, at least one guide groove is formed in the guide sleeve, at least one sliding groove is formed in the wall of the main lens barrel, guide nails are arranged in the guide grooves, and the guide nails penetrate through the sliding grooves and are fixed on the focusing lens barrel;
The electric assembly comprises a connecting flange arranged at the right end of the main lens cone, a motor frame is arranged on the outer side wall of the connecting flange, a motor is arranged on the motor frame, a motor gear is arranged at the tail end of an output shaft of the motor, and a guide sleeve gear meshed with the motor gear is arranged at the outer side of the guide sleeve;
The positive lens C is arranged in the focusing lens barrel, a C-piece pressing ring for fixing the positive lens C in the focusing lens barrel is arranged on the left side of the positive lens C, the positive lens A and the positive lens B are arranged in the main lens barrel, an A-piece pressing ring for fixing the positive lens A in the main lens barrel is arranged on the left side of the positive lens A, and an AB spacer for fixing the positive lens B in the main lens barrel is arranged on the left side of the positive lens B;
A micro-switch flange is arranged between the main lens barrel and the connecting flange, and two micro-switches are arranged on the outer side wall of the micro-switch flange;
a plurality of adjusting grooves are uniformly distributed on the connecting flange along the circumferential direction, and a plurality of adjusting grooves are uniformly distributed on the microswitch flange along the circumferential direction;
Specific performance parameters of the optical structure are: (1) operating band: 3.2 μm-3.4 μm; (2) focal length: f' =45 mm; (3) a detector: long wave infrared non-refrigeration 320 x 256, 30 μm; (4) angle of view: 12 ° ×9.6°; (5) relative pore diameter D/f': 1/2;
the assembly method of the medium wave motor focusing infrared lens comprises the following steps:
(1) Sequentially fixing and connecting the main lens cone, the focusing lens cone and the guide sleeve by using guide nails;
(2) Installing a microswitch flange and a connecting flange at the right end of the main lens barrel;
(3) The micro-switch is respectively arranged on the micro-switch flange;
(4) Locking the motor to a motor bracket of the connecting flange;
(5) Fixing a motor gear on an output shaft of a motor by using AB glue;
(6) The positive lens C is placed horizontally on the focusing carriage and fixed with a C-plate press ring:
(7) The positive lens B is horizontally assembled into the main lens barrel and is fixed by an AB spacer ring;
(8) The positive lens A is horizontally assembled into the main lens barrel, waterproof silica gel is smeared, and the positive lens A is fixed by an A-piece pressing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011049176.8A CN112114415B (en) | 2020-09-29 | 2020-09-29 | Medium wave motor focusing infrared lens and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011049176.8A CN112114415B (en) | 2020-09-29 | 2020-09-29 | Medium wave motor focusing infrared lens and assembly method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112114415A CN112114415A (en) | 2020-12-22 |
| CN112114415B true CN112114415B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011049176.8A Active CN112114415B (en) | 2020-09-29 | 2020-09-29 | Medium wave motor focusing infrared lens and assembly method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114355596B (en) * | 2021-12-31 | 2023-08-11 | 福建福光股份有限公司 | Infrared lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707466A (en) * | 2016-12-16 | 2017-05-24 | 福建福光股份有限公司 | F11.5 mm machinery passive type athermal lens |
| CN107390349A (en) * | 2017-08-30 | 2017-11-24 | 福建福光股份有限公司 | A kind of long wave refrigeration mode is without thermalization camera lens |
| CN109407257A (en) * | 2018-12-28 | 2019-03-01 | 福建福光天瞳光学有限公司 | A kind of f100mm non-refrigeration type LONG WAVE INFRARED camera lens and its assembly method |
| CN213240636U (en) * | 2020-09-29 | 2021-05-18 | 福建福光天瞳光学有限公司 | Medium wave motor focusing infrared lens |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221524B2 (en) * | 2004-01-30 | 2007-05-22 | Fujifilm Corporation | Lens unit and compact image pickup module |
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2020
- 2020-09-29 CN CN202011049176.8A patent/CN112114415B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707466A (en) * | 2016-12-16 | 2017-05-24 | 福建福光股份有限公司 | F11.5 mm machinery passive type athermal lens |
| CN107390349A (en) * | 2017-08-30 | 2017-11-24 | 福建福光股份有限公司 | A kind of long wave refrigeration mode is without thermalization camera lens |
| CN109407257A (en) * | 2018-12-28 | 2019-03-01 | 福建福光天瞳光学有限公司 | A kind of f100mm non-refrigeration type LONG WAVE INFRARED camera lens and its assembly method |
| CN213240636U (en) * | 2020-09-29 | 2021-05-18 | 福建福光天瞳光学有限公司 | Medium wave motor focusing infrared lens |
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| CN112114415A (en) | 2020-12-22 |
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