CN210514769U - Non-refrigeration type long-wave infrared continuous zoom lens - Google Patents
Non-refrigeration type long-wave infrared continuous zoom lens Download PDFInfo
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- CN210514769U CN210514769U CN201921308420.0U CN201921308420U CN210514769U CN 210514769 U CN210514769 U CN 210514769U CN 201921308420 U CN201921308420 U CN 201921308420U CN 210514769 U CN210514769 U CN 210514769U
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Abstract
The utility model relates to an infrared zoom lens in succession of uncooled type long wave, including the lens cone, set gradually the preceding fixed group of positive focal power, the variable power group of negative focal power, the compensation group of positive focal power, the back fixed group of positive focal power, the back variable power group of negative focal power, the focusing group of positive focal power along light from left right side incident direction in the lens cone, preceding fixed group is a slice convex surface towards the meniscus germanium positive lens of object side, and the variable power group is a slice biconcave germanium negative lens, and the compensation group is a slice biconvex germanium positive lens, and the back fixed group is a slice convex surface towards the meniscus germanium positive lens of object side, and back variable power group is a slice concave surface towards the meniscus germanium negative lens of image side, and the focusing group is a slice convex surface towards the meniscus germanium positive lens of object side, and this lens structural design is simple, compact, and detection distance is far away, low distortion, vibration and impact resistance.
Description
Technical Field
The invention relates to a non-refrigeration type long-wave infrared continuous zoom lens.
Background
With the rapid development of scientific technology and the continuous development and the increasing maturity of the uncooled detector technology, the long-wave infrared uncooled optical system has many excellent characteristics, such as a passive working mode, can not be interfered by local electrons and has good concealment; the image is visual and easy to observe; high precision, etc., and is widely applied in military and civil fields. In recent years, with the long-term development of infrared optical technology and the continuous expansion of the application range thereof, the demand for an infrared continuous zoom optical system is increasingly enhanced. The infrared continuous zooming optical system can continuously change the focal length of the system within a certain range, and the image plane can be kept stable and clear while the view field is changed, so that the image plane is not easy to float.
Although the existing continuous zooming infrared lens has a continuous zooming function, the existing continuous zooming infrared lens has the defects of complex structure, heavy weight, large volume, large temperature influence and poor regional applicability.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide a non-refrigeration type long-wave infrared continuous zoom lens.
In order to solve the technical problems, the technical scheme of the invention is as follows: a non-refrigeration type long-wave infrared continuous zoom lens comprises a lens barrel, wherein a front fixed group with positive focal power, a variable-power group with negative focal power, a compensation group with positive focal power, a rear fixed group with positive focal power, a rear variable-power group with negative focal power and a focusing group with positive focal power are sequentially arranged in the lens barrel along the incident direction of light from left to right, the front fixed group is a meniscus germanium positive lens with a convex surface facing an object side, the variable-power group is a biconcave germanium negative lens, the compensation group is a biconvex germanium positive lens, the rear fixed group is a meniscus germanium positive lens with a convex surface facing the object side, the rear variable-power group is a meniscus germanium negative lens with a concave surface facing an image side, and the focusing group is a meniscus germanium positive lens with a convex surface facing the object side.
Further, the air interval between the front fixed group and the zooming group is 21-78.8 mm, the air interval between the zooming group and the compensation group is 101.8-5.1 mm, the air interval between the compensation group and the rear fixed group is 3.6-42.4 mm, the air interval between the rear fixed group and the rear zooming group is 13.45mm, and the air interval between the rear zooming group and the focusing group is 58.3 mm.
Further, the lens cone includes main microscope base, rear mirror seat and focusing microscope base, the lens cone includes main microscope base, rear mirror seat, the anterior segment inner wall of main microscope base is equipped with the preceding group microscope base that is used for installing preceding fixed group, the middle section inner wall of main microscope base is equipped with the zoom microscope base that is used for installing the zoom group, the back end inner wall of main microscope base is equipped with the compensation microscope base that is used for installing the compensation group, the rear end of main microscope base is connected with the rear mirror base, the back end inner wall of rear mirror base is equipped with the focusing lens cone that is used for installing the focusing group, install electronic zoom mechanism on the main microscope base, install electronic focusing mechanism on the rear mirror base.
Furthermore, a pressing ring A is installed at the front end of the front group lens base, and a sealing ring is installed between the front group lens base and the main lens base.
Further, electronic zoom mechanism is including installing the motor frame A at main microscope base middle section upside, motor A is installed to A on the motor frame A, motor gear on motor A's the output shaft with set up the accurate meshing of potentiometre gear on the potentiometre of motor side, motor gear with set up in the preceding group lens frame upside and through the accurate meshing of the cam that the cam clamping ring locked, be provided with the front end on the cam, the rear end all is provided with cam guide nail, the cam guide nail that is located the front end is connected with the zoom that sets up on the zoom lens frame, be equipped with the zoom balladeur train in the preceding group lens frame, the compensation balladeur train, the cam guide nail and the zoom of front end move a sliding fit, the cam guide nail that is located the rear end is connected with the compensation that sets up on the compensation microscope frame and is moved a seat, the compensation is moved seat and is led nail sliding fit with the.
Further, electronic focusing mechanism is including installing the motor frame B at rear mirror seat middle-end upside, installs motor B on the motor frame B, and motor B's motor gear and the focusing ring of cover arrangement rear mirror seat rear end periphery are accurate meshing, are provided with the focusing on the focusing ring and lead the nail, and the focusing is led the nail and is installed on the focusing lens cone that the inner wall is connected with rear mirror seat.
Compared with the prior art, the invention has the following beneficial effects: the structure design is simple and compact, the detection distance is long, and the device has low distortion and is vibration and impact resistant.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic view of an optical system of the lens barrel;
FIG. 2 is a schematic mechanical diagram of the lens barrel;
fig. 3 is a side view of a mechanical structure of the lens barrel;
fig. 4 is an isometric view of the mechanical structure of the lens.
In the figure:
a-front fixed group lenses; b-variable power group lens; c-compensation group lenses; d-rear fixed group lens; e-post zoom group lenses; f-focusing group lens; 1-pressing ring A; 2-sealing ring; 3-main lens base; 4-steel balls; 5-zooming carriage; 6-compensating the carriage; 7-pressing ring D; 8-rear group lens barrel; 9-a focusing ring; 10-a focus lens barrel; 11-pressing ring F; 12-a detector attachment flange; 13-pressing ring A; 14-front group lens base; 15 pressing a ring B; 16-zoom lens base; 17-cam guide pin; 18-roller; 19-roller shims; 20-a cam; 21-pressing ring C; 22-space ring; 23-cam pressing ring; 24-a stop pin; 25-focusing guide pins; 26-a focusing ring retainer ring; 38-universal post; 39-potentiometer A; 40-potentiometer gear a; 41-motor A; 42-motor gear a; 43-Motor mount A; 44-motor mount B; 45-potentiometer gear B; 46-a zoom switch frame; 47-microswitch A; 48-universal clang nails; 49-focus switch frame; 50-microswitch B.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1 to 4, a non-refrigeration long-wave infrared continuous zoom lens includes a lens barrel, a front fixed group with positive refractive power, a variable-power group with negative refractive power, a compensation group with positive refractive power, a rear fixed group with positive refractive power, a rear variable-power group with negative refractive power, and a focusing group with positive refractive power are sequentially disposed in the lens barrel along a left-to-right incident direction of light, the front fixed group is a meniscus germanium positive lens with a convex surface facing an object side, the variable-power group is a biconcave germanium negative lens, the compensation group is a biconvex germanium positive lens, the rear fixed group is a meniscus germanium positive lens with a convex surface facing the object side, the rear variable-power group is a meniscus germanium negative lens with a concave surface facing the object side, and the focusing group is a meniscus germanium positive lens with a convex surface facing the object side.
Further, the air interval between the front fixed group and the zooming group is 21-78.8 mm, the air interval between the zooming group and the compensation group is 101.8-5.1 mm, the air interval between the compensation group and the rear fixed group is 3.6-42.4 mm, the air interval between the rear fixed group and the rear zooming group is 13.45mm, and the air interval between the rear zooming group and the focusing group is 58.3 mm.
In this embodiment, the lens cone includes main microscope base, rear mirror seat and focusing microscope base, the lens cone includes main microscope base, rear mirror seat, the anterior segment inner wall of main microscope base is equipped with the preceding group microscope base that is used for installing preceding fixed group, the middle section inner wall of main microscope base is equipped with the zoom microscope base that is used for installing the zoom group, the back end inner wall of main microscope base is equipped with the compensation microscope base that is used for installing the compensation group, the rear end of main microscope base is connected with the rear mirror base, the back end inner wall of rear mirror base is equipped with the focusing lens cone that is used for installing the focusing group, install electronic zoom mechanism on the main microscope base, install electronic focusing mechanism on the rear mirror base.
In this embodiment, a pressing ring a is installed at the front end of the front lens group base, and a sealing ring is installed between the front lens group base and the main lens group base to ensure the air tightness of the structure.
In this embodiment, electronic zoom mechanism is including installing the motor frame a at main mirror seat middle section upside, motor a is installed to a on the motor frame a, motor gear on motor a's the output shaft with set up the accurate meshing of potentiometre gear on the potentiometre of motor side, the potentiometre is installed at motor frame a, motor gear with set up in front group mirror seat upside and through the accurate meshing of the cam of cam clamping ring locking, be provided with the front end on the cam, the rear end all is provided with cam guide pin, the cam guide pin that is located the front end is connected with the zoom removal seat that sets up on the zoom mirror seat, be equipped with the zoom balladeur train in the front group mirror seat, the compensation balladeur train, the cam guide pin and the zoom removal seat sliding fit of front end, the cam guide pin that is located the rear end is connected with the compensation removal seat that sets up on the compensation mirror seat, the compensation removal seat is connected with the cam guide pin. The motor frame A is provided with a microswitch A at two extreme positions of the cam, and the cam is limited by the microswitch A when rotating to the extreme positions at the two ends.
In this embodiment, the electric focusing mechanism includes a motor frame B installed at the upper side of the middle end of the rear lens base, a motor B is installed on the motor frame B, a motor gear of the motor B is precisely engaged with a focusing ring sleeved at the periphery of the rear end of the rear lens base, a focusing guide nail is arranged on the focusing ring, the focusing guide nail is installed on a focusing lens barrel whose inner wall is connected with the rear lens base, a pressing ring D for fixing a rear fixing group lens is assembled on the inner wall of the front section of the rear lens base, a spacer ring is arranged between the compensating group lens and the rear fixing group lens, a focusing lens barrel for fixing the focusing group lens is assembled on the inner wall of the rear end of the rear lens base, and the focusing lens barrel is connected with the rear group lens barrel and the focusing cam through the. And the motor frame B is provided with micro switches B at two limit positions of the focusing ring, and the focusing ring is limited by the micro switches B when rotating to the limit positions at the two ends.
In the present embodiment, the air distance between the front fixed group and the power variable group is adjusted by an adjusting shim disposed between the front fixed group lens and the front group lens holder.
In this embodiment, preceding group's lens holder adopts the alloy steel similar with the glass material of preceding fixed group's lens to guarantee that the lens holder does not receive the stress influence of material expend with heat and contract with cold under the operating temperature environment, the alloy material that preceding group's lens holder adopted easily takes place the corrosion, selects for use the paint spraying technology admittedly to prevent that it from rustting the aforesaid preceding group's lens holder and directly puts into main lens holder, and is fixed through clamping ring A, because there is not the friction with the main lens cone, can guarantee preceding group's lens holder lacquer layer is complete, is difficult for taking place the corrosion.
In this embodiment, the variable power lens is installed in the variable power lens base and fixed by the pressing ring B, the variable power lens base is fixed on the variable power sliding frame by the screw, the variable power lens base adjusts the air distance between the variable power lens base and the front fixing group and between the variable power lens base and the variable power sliding frame by the adjusting shim between the variable power lens base and the variable power sliding frame, the variable power sliding frame is connected with the main lens base and the cam by the guide pin, the compensation group is installed on the compensation sliding frame and fixed by the pressing ring C, and the compensation sliding frame is connected with the main lens base and the cam by the guide pin.
The motor A drives the cam to rotate through the motor gear on the motor A, so as to drive the zoom group and the compensation group to move and carry out zooming of the optical system, and the motor B drives the focusing ring to rotate through the motor gear on the motor B so as to drive the focusing group to move and carry out focusing of the optical system.
In this embodiment, the optical structure formed by the above lens assembly achieves the following optical indexes: the focal length f' is 38mm-190 mm; relative pore diameter F: 1.0 to 1.2; the field angle: 16.7 degrees X12.5 degrees to 3.5 degrees X2.6 degrees; resolution ratio: can be adapted with 640 x 51217 μm detector camera; the total length sigma of the light path is less than or equal to 286mm, and the optical back intercept l' is more than or equal to 48.37 mm; applicable spectral line range: 8-12 μm.
In the embodiment, an optical glass material with high refraction and low dispersion is selected, and various aberrations of the optical lens are corrected through design and optimization, so that the lens has the advantages of high resolution, large relative aperture, low distortion and the like; the distortion is small, is less than 1%, and is better controlled relative to the distortion of an old structure; in the optical design, the optical axis drift in the zooming process is effectively controlled through the optimized design of the cam curve, and the imaging quality is excellent in the full focal length range.
The specific parameters of each lens are as follows:
the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (6)
1. A non-refrigeration type long-wave infrared continuous zoom lens is characterized in that: the lens barrel comprises a lens barrel, wherein a front fixed group with positive focal power, a variable power group with negative focal power, a compensation group with positive focal power, a rear fixed group with positive focal power, a rear variable power group with negative focal power and a focusing group with positive focal power are sequentially arranged in the lens barrel along the incident direction of light from left to right, the front fixed group is a meniscus germanium positive lens with a convex surface facing an object side, the variable power group is a biconcave germanium negative lens, the compensation group is a biconvex germanium positive lens, the rear fixed group is a meniscus germanium positive lens with a convex surface facing the object side, the rear variable power group is a meniscus germanium negative lens with a concave surface facing the image side, and the focusing group is a meniscus germanium positive lens with a convex surface facing the object side.
2. The uncooled long-wave infrared continuous zoom lens according to claim 1, wherein: the air interval between the front fixed group and the zooming group is 21-78.8 mm, the air interval between the zooming group and the compensation group is 101.8-5.1 mm, the air interval between the compensation group and the rear fixed group is 3.6-42.4 mm, the air interval between the rear fixed group and the rear zooming group is 13.45mm, and the air interval between the rear zooming group and the focusing group is 58.3 mm.
3. The uncooled long-wave infrared continuous zoom lens according to claim 1, wherein: the lens cone comprises a main lens base, a rear lens base and a focusing lens base, the lens cone comprises a main lens base and a rear lens base, the front section inner wall of the main lens base is assembled with a front lens base for installing a front fixing group, the middle section inner wall of the main lens base is assembled with a zoom lens base for installing a zoom group, the rear section inner wall of the main lens base is assembled with a compensation lens base for installing the compensation group, the rear end of the main lens base is connected with the rear lens base, the rear section inner wall of the rear lens base is assembled with a focusing lens cone for installing the focusing group, an electric zooming mechanism is installed on the main lens base, and an electric focusing mechanism is installed on the rear lens base.
4. The uncooled long-wave infrared continuous zoom lens according to claim 3, wherein: the front end of the front lens seat is provided with a pressing ring A, and a sealing ring is arranged between the front lens seat and the main lens seat.
5. The uncooled long-wave infrared continuous zoom lens according to claim 3, wherein: the electronic zoom mechanism is including installing the motor frame A at main microscope base middle section upside, motor A is installed to A on the motor frame A, motor gear on motor A's the output shaft with set up the accurate meshing of potentiometre gear on the potentiometre of motor side, motor gear with set up in preceding group microscope base upside and through the accurate meshing of the cam of cam clamping ring locking, be provided with the front end on the cam, the rear end all is provided with the cam and leads the nail, the cam that is located the front end leads the nail and sets up the zoom removal seat on the zoom microscope base and be connected, be equipped with the zoom balladeur train in the preceding group microscope base, the compensation balladeur train, the cam of front end leads the nail and moves a sliding fit with the zoom, the cam that is located the rear end leads the nail and is connected with the compensation removal seat that sets up on the compensation microscope base, the compensation is moved the.
6. The uncooled long-wave infrared continuous zoom lens according to claim 5, wherein: the electric focusing mechanism comprises a motor frame B arranged on the upper side of the middle end of the rear lens base, a motor B is arranged on the motor frame B, a motor gear of the motor B is precisely meshed with a focusing ring sleeved on the periphery of the rear end of the rear lens base, a focusing guide nail is arranged on the focusing ring, and the focusing guide nail is arranged on a focusing lens barrel with the inner wall connected with the rear lens base.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921308420.0U CN210514769U (en) | 2019-08-13 | 2019-08-13 | Non-refrigeration type long-wave infrared continuous zoom lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921308420.0U CN210514769U (en) | 2019-08-13 | 2019-08-13 | Non-refrigeration type long-wave infrared continuous zoom lens |
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| CN210514769U true CN210514769U (en) | 2020-05-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412756A (en) * | 2019-08-13 | 2019-11-05 | 福建福光天瞳光学有限公司 | Non-refrigeration type long-wave infrared continuous zoom lens and adjusting method |
| CN114415357A (en) * | 2021-12-20 | 2022-04-29 | 南京波长光电科技股份有限公司 | Miniaturized medium-wave refrigeration infrared continuous zooming optical system with focal length of 15mm-250mm |
-
2019
- 2019-08-13 CN CN201921308420.0U patent/CN210514769U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412756A (en) * | 2019-08-13 | 2019-11-05 | 福建福光天瞳光学有限公司 | Non-refrigeration type long-wave infrared continuous zoom lens and adjusting method |
| CN114415357A (en) * | 2021-12-20 | 2022-04-29 | 南京波长光电科技股份有限公司 | Miniaturized medium-wave refrigeration infrared continuous zooming optical system with focal length of 15mm-250mm |
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