CN212675251U - Long-wave electric focusing high-pixel high-resolution infrared lens - Google Patents
Long-wave electric focusing high-pixel high-resolution infrared lens Download PDFInfo
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- CN212675251U CN212675251U CN202021239569.0U CN202021239569U CN212675251U CN 212675251 U CN212675251 U CN 212675251U CN 202021239569 U CN202021239569 U CN 202021239569U CN 212675251 U CN212675251 U CN 212675251U
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Abstract
The utility model relates to an electronic focusing high pixel high resolution infrared camera lens of long wave: including setting up positive lens A, negative lens B, the positive lens C that sets gradually along light incidence direction in the camera lens structure, the air interval between positive lens A and the negative lens B is 45.94mm, and the air interval between negative lens B and the positive lens C is 53.18mm, and the air interval between positive lens A and the positive lens C is 103.28 mm. The invention has the advantages of compact structure, short structural length of the lens, high transmittance, wide focusing range and stable optical axis of the lens in the focusing process, and is convenient to control the motor to focus indoors through software.
Description
Technical Field
The utility model relates to an electronic focusing high pixel high resolution infrared camera lens of long wave.
Background
With the development of science and technology, infrared imaging technology has been widely applied in the fields of national defense, industry, medical treatment and the like. The infrared detection has certain capabilities of penetrating smoke, fog, haze, snow and the like and recognizing camouflage, is not interfered by battlefield strong light and flash light to cause blindness, can realize long-distance and all-weather observation, is particularly suitable for target detection at night and under adverse weather conditions, and simultaneously provides higher requirements for monitoring ocular images and definition, thus requiring a lens with high pixel resolution.
The temperature not only affects the refractive index of the optical material, but also expands with heat and contracts with cold on the lens barrel material, so that the focal power changes and the optimal image plane shifts. The optical imaging quality is reduced, the image is blurred, the contrast is reduced, the imaging performance of the lens is influenced finally, but the image plane is offset due to temperature change compensation in an electric focusing mode; meanwhile, when the lens monitors objects with different distances, the images are virtual and unclear because the optimal image planes of the objects with different distances are not on the same plane when the objects with different distances are imaged through the lens; objects with different distances can be imaged on the same surface through the lens in an electric focusing mode.
Disclosure of Invention
The utility model provides a high pixel high resolution infrared camera lens of electronic focusing of long wave and mounting method thereof solves because of the refracting index of the optical material that leads to of temperature receives the influence to solve the lens cone material and cause expend with heat and contract with cold, cause the problem that focal power change and best image plane take place the skew.
The invention solves the technical problem by adopting the scheme that the long-wave electric focusing high-pixel high-resolution infrared lens comprises the following components in parts by weight: including setting up positive lens A, negative lens B, the positive lens C that sets gradually along light incidence direction in the camera lens structure, the air interval between positive lens A and the negative lens B is 45.94mm, and the air interval between negative lens B and the positive lens C is 53.18mm, and the air interval between positive lens A and the positive lens C is 103.28 mm.
Furthermore, the lens structure comprises a main lens cone, a focusing lens cone and a rear lens group barrel, wherein the focusing lens cone is sleeved at the rear side inside the main lens cone, and the rear lens group barrel is screwed at the rear part of the main lens cone.
Further, the positive lens A is arranged in the main lens cone, a clamping ring piece A used for compressing the positive lens A is arranged in the main lens cone, the negative lens B is arranged in the focusing lens cone, the clamping ring piece B used for compressing the negative lens B is arranged in the focusing lens cone, the positive lens C is arranged in the rear group lens cone, and a clamping ring piece C used for compressing the positive lens C is arranged in the rear group lens cone.
Furthermore, a focusing ring is sleeved on the outer periphery of the rear side of the main lens cone corresponding to the focusing lens cone, a driven gear A is arranged on the outer periphery of the front end of the focusing ring, corresponding double chutes are arranged on the outer peripheries of the focusing ring and the main lens cone, guide screws are arranged in the double chutes, and the guide screws are fixedly arranged on the focusing lens cone.
Further, a motor base is screwed on the periphery of the main lens cone, a motor and a potentiometer are screwed on the motor base, and a driving gear and a driven gear B which are meshed with the driven gear A and connected with the motor and the potentiometer are respectively installed on a main shaft of the motor and the potentiometer.
Furthermore, the periphery of the main lens cone is fixedly provided with a right limiting frame and a left limiting frame in a corresponding threaded manner, and the right limiting frame and the left limiting frame are internally and fixedly provided with a microswitch in a threaded manner.
Furthermore, the focusing ring is placed on the main lens cone, and the focusing ring pressing ring is screwed in from the rear end of the main lens cone, so that the focusing ring is pressed tightly.
Furthermore, a limit nail matched with the microswitch is also arranged on the focusing ring.
Compared with the prior art, the utility model discloses following beneficial effect has: the optical lens has the advantages of compact structure, short structural length of the lens, stable and non-offset optical axis in the focusing process, convenience in carrying, high pixel and high resolution, and can be adapted to a long-wave infrared uncooled 1280 multiplied by 1024 or 12 mu m detector in the optical design to perform live recording and monitoring tasks.
Drawings
The following describes the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic view of an optical system according to the present invention;
FIG. 2 is a schematic view of the mechanical structure of the present invention;
fig. 3 is a schematic structural diagram of the present invention.
In the figure: 1-a main barrel; 2-right limiting frame; 3-a limit nail; 4-guide nail; 5-a focusing ring; 6-pressing ring of focusing ring; 7-rear group lens barrel; 8-a drive gear; 9-a potentiometer; 10-a motor base; 11-a left limit frame; 12-a microswitch; 13-a motor; 14-pressing ring piece A; 15-positive lens a; 16-pressing ring piece B; 17-negative perspective B; 18-a focus lens barrel; 19-pressing ring piece C; 20-positive lens C.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-3, a long-wave electric focusing high-pixel high-resolution infrared lens: including setting up positive lens A, negative lens B, the positive lens C that sets gradually along light incidence direction in the camera lens structure, the air interval between positive lens A and the negative lens B is 45.94mm, and the air interval between negative lens B and the positive lens C is 53.18mm, and the air interval between positive lens A and the positive lens C is 103.28 mm.
In this embodiment, the lens structure includes a main lens barrel, a focusing lens barrel, and a rear lens barrel, wherein the focusing lens barrel is sleeved at the rear side of the main lens barrel, and the rear lens barrel is screwed at the rear of the main lens barrel.
In this embodiment, the positive lens a is mounted in the main barrel, a pressing ring piece a for pressing the positive lens a is mounted in the main barrel, the negative lens B is mounted in the focusing barrel, the pressing ring piece B for pressing the negative lens B is mounted in the focusing barrel, the positive lens C is mounted in the rear group barrel, and a pressing ring piece C for pressing the positive lens C is mounted in the rear group barrel.
In this embodiment, a focusing ring is sleeved on the outer periphery of the rear side of the main lens barrel corresponding to the focusing lens barrel, a driven gear a is arranged on the outer periphery of the front end of the focusing ring, corresponding double chutes are arranged on the outer peripheries of the focusing ring and the main lens barrel, guide screws are arranged in the double chutes, and the guide screws are fixed on the focusing lens barrel.
In this embodiment, the focusing structure adjusts the position of the negative lens B to compensate for the image plane offset caused by the target distance variation and the temperature variation.
In this embodiment, a motor base is screwed on the periphery of the main lens barrel, a motor and a potentiometer are screwed on the motor base, a driving gear and a driven gear B which are meshed with the driven gear a and connected with the driven gear a are respectively installed on a main shaft of the motor and a main shaft of the potentiometer, the potentiometer is used for recording resistance values corresponding to the focusing lens barrel at various positions, and when the potentiometer feeds the resistance values back to the control system, the specific position of the focusing lens barrel is known.
In this embodiment, the periphery of the main lens cone is provided with a right limiting frame and a left limiting frame corresponding to the screws, the right limiting frame and the left limiting frame are internally provided with micro switches, and the micro switches on the right limiting frame and the left limiting frame mainly act on triggering the micro switches to turn off a power supply when the focusing ring rotates to 2 limiting positions, so that the motor is prevented from being burnt out due to overlarge current when the motor rotates to the limiting positions.
In this embodiment, the focus ring is put on the main barrel, and the focus ring pressing ring is screwed in from the rear end of the main barrel, thereby pressing the focus ring.
In this embodiment, the focusing ring is further provided with a limit pin matched with the micro switch, and when the focusing ring and the limit pin rotate together, the limit pin triggers the micro switch to turn off the power supply when reaching the limit position.
An assembly method of a long-wave electric focusing high-pixel high-resolution infrared lens comprises the following steps:
step 1), putting the negative lens barrel B into a focusing lens barrel, and then pressing and fixing the negative lens barrel B by a pressing ring piece B; then, the mounted focusing lens barrel is sleeved in the main lens barrel, the focusing ring is sleeved on the periphery of the main lens barrel, the focusing ring corresponds to the double inclined grooves on the main lens barrel, then the focusing ring is pressed and fixed by a focusing ring pressing ring, and then a guide nail penetrates through the focusing ring and the double inclined groove of the main lens barrel and is fixed on the focusing lens barrel; putting the positive lens A into the main lens cone and then pressing and fixing the positive lens A by using a pressing ring piece A; the positive lens C is put into the rear lens group barrel and is pressed and fixed by the pressing ring piece C, and then the rear lens group barrel is screwed on the main lens barrel
Step 2): fixing a motor screw and a potentiometer on a motor base, sequentially installing a driving gear and a driven gear B on a motor and a potentiometer shaft and meshing the driving gear and the driven gear B with a driven gear A, and then fixing the motor base on a main lens barrel in a screw mode; the micro switch is screwed on the right limiting frame and the left limiting frame, the right limiting frame and the left limiting frame are screwed on the main lens cone, and the limiting nail is fixed on the focusing ring.
In this embodiment, focusing is performed by adjusting the position mode of the negative lens module B, the position accuracy of the lens imaging surface can be well guaranteed by the mode, the focusing structure adopts a structure that gear rotation motion is changed into linear motion, a motor drives a gear to rotate, the gear drives a guide nail to move, the guide nail drives a focusing lens barrel and the negative lens module B to move, the guide nail can only move back and forth due to the limitation of a linear guide groove of a main lens barrel, so that the focusing function of the back and forth movement of the negative lens module B is realized, meanwhile, the focusing process is guaranteed that the lens optical axis only moves back and forth, and the lens optical axis is prevented from generating large offset in the moving process.
In this embodiment, the optical structure formed by the above lens assembly achieves the following optical indexes:
the working wave band is as follows: 8-12 μm;
focal length: f' =100 mm;
a detector: the long-wave infrared non-refrigeration type is 1280 multiplied by 1024, 12 mu m;
the field angle: 8.8 ° × 7.04 °;
relative pore diameter D/f': 1/1.
The specific parameters of each lens are as follows.
In this embodiment, the aspherical surface satisfies the following formula:
wherein, Z is the distance from the vertex of the aspheric surface to the height r when the aspheric surface reaches the position with the height r along the optical axis direction; c =1/r, r represents the paraxial radius of curvature of the mirror surface, and k is the conic coefficient; a2, a4, a6, A8, a10, a12, and a14 are high-order aspheric coefficients.
The table of high-order aspheric coefficients is shown in the following table.
In this embodiment, be equipped with like this and do benefit to the air distance of guaranteeing between each lens, improve the assembly yields, the structure of focusing cam does benefit to the stability of optical axis to and focusing cam structural style is favorable to reducing the part machining degree of difficulty, reduces the assembly requirement. All the thread matching positions between the main lens barrels are injected with shellac, and the method is helpful to improve the vibration resistance and impact resistance of the optical lens part and improve the shock resistance of the whole lens.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the orientation or positional relationship indicated in any of the above-mentioned technical solutions of the present disclosure for indicating positional relationship, such as "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of describing the present disclosure, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present disclosure, and the term used for indicating shape applied in any of the above-mentioned technical solutions of the present disclosure includes a shape similar, analogous or approximate thereto unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (8)
1. The utility model provides an electronic focusing high pixel high resolution infrared camera lens of long wave which characterized in that: including setting up positive lens A, negative lens B, the positive lens C that sets gradually along light incidence direction in the camera lens structure, the air interval between positive lens A and the negative lens B is 45.94mm, and the air interval between negative lens B and the positive lens C is 53.18mm, and the air interval between positive lens A and the positive lens C is 103.28 mm.
2. The long-wave electric focusing high-pixel high-resolution infrared lens as claimed in claim 1, characterized in that: the lens structure comprises a main lens cone, a focusing lens cone and a rear lens group barrel, wherein the focusing lens cone is sleeved on the rear side in the main lens cone, and the rear lens group barrel is screwed on the rear part of the main lens cone.
3. The long-wave electric focusing high-pixel high-resolution infrared lens as claimed in claim 2, characterized in that: the positive lens A is arranged in the main lens barrel, a clamping ring piece A used for compressing the positive lens A is arranged in the main lens barrel, the negative lens B is arranged in the focusing lens barrel, the clamping ring piece B used for compressing the negative lens B is arranged in the focusing lens barrel, the positive lens C is arranged in the rear lens group barrel, and a clamping ring piece C used for compressing the positive lens C is arranged in the rear lens group barrel.
4. The long-wave electric focusing high-pixel high-resolution infrared lens as claimed in claim 3, characterized in that: the focusing ring is sleeved on the outer periphery of the rear side of the main lens cone corresponding to the focusing lens cone, a driven gear A is arranged on the outer periphery of the front end of the focusing ring, corresponding double chutes are arranged on the outer peripheries of the focusing ring and the main lens cone, guide nails are arranged in the double chutes, and the guide nails are screwed on the focusing lens cone.
5. The long-wave electric focusing high-pixel high-resolution infrared lens as claimed in claim 3, characterized in that: the periphery of the main lens cone is fixedly screwed with a motor base, the motor base is fixedly screwed with a motor and a potentiometer, and a main shaft of the motor and the potentiometer is respectively provided with a driving gear and a driven gear B which are meshed with the driven gear A and connected with the driving gear and the driven gear.
6. The long-wave electric focusing high-pixel high-resolution infrared lens as claimed in claim 3, characterized in that: the periphery of the main lens barrel is fixedly provided with a right limiting frame and a left limiting frame correspondingly in a threaded manner, and the right limiting frame and the left limiting frame are internally and fixedly provided with a microswitch in a threaded manner.
7. The long-wave electric focusing high-pixel high-resolution infrared lens as claimed in claim 4, characterized in that: the focusing ring is put on the main lens cone, and then the focusing ring pressing ring is screwed in from the rear end of the main lens cone, so that the focusing ring is pressed tightly.
8. The long-wave electric focusing high-pixel high-resolution infrared lens as claimed in claim 4, characterized in that: and the focusing ring is also provided with a limit nail matched with the microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021239569.0U CN212675251U (en) | 2020-06-30 | 2020-06-30 | Long-wave electric focusing high-pixel high-resolution infrared lens |
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| CN202021239569.0U CN212675251U (en) | 2020-06-30 | 2020-06-30 | Long-wave electric focusing high-pixel high-resolution infrared lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722351A (en) * | 2020-06-30 | 2020-09-29 | 福建福光天瞳光学有限公司 | Long-wave electric focusing high-pixel high-resolution infrared lens and assembling method thereof |
| CN113281772A (en) * | 2021-04-22 | 2021-08-20 | 中国科学院紫金山天文台 | Highly integrated visible light wave band space debris detection system |
| CN114355596A (en) * | 2021-12-31 | 2022-04-15 | 福建福光股份有限公司 | Infrared lens |
-
2020
- 2020-06-30 CN CN202021239569.0U patent/CN212675251U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722351A (en) * | 2020-06-30 | 2020-09-29 | 福建福光天瞳光学有限公司 | Long-wave electric focusing high-pixel high-resolution infrared lens and assembling method thereof |
| CN113281772A (en) * | 2021-04-22 | 2021-08-20 | 中国科学院紫金山天文台 | Highly integrated visible light wave band space debris detection system |
| CN113281772B (en) * | 2021-04-22 | 2024-05-31 | 中国科学院紫金山天文台 | Highly integrated visible light wave band space debris detection system |
| CN114355596A (en) * | 2021-12-31 | 2022-04-15 | 福建福光股份有限公司 | Infrared lens |
| CN114355596B (en) * | 2021-12-31 | 2023-08-11 | 福建福光股份有限公司 | Infrared lens |
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