CN111999842A - f35mm mechanical passive athermalization lens and assembling method thereof - Google Patents
f35mm mechanical passive athermalization lens and assembling method thereof Download PDFInfo
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- CN111999842A CN111999842A CN202010891182.1A CN202010891182A CN111999842A CN 111999842 A CN111999842 A CN 111999842A CN 202010891182 A CN202010891182 A CN 202010891182A CN 111999842 A CN111999842 A CN 111999842A
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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
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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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
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
-
- 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
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention provides a f35mm mechanical passive athermalization lens and an assembling method thereof, and the mechanical passive athermalization lens comprises a lens barrel, wherein a negative lens A, a negative transparent lens B and a positive lens C are sequentially arranged in the lens barrel from left to right along light rays, the air interval between the negative lens A and the negative lens B is 6.16mm, and the air interval between the negative lens B and the positive lens C is 10.3 mm. The manufacturing cost is low, and the method is suitable for large-scale production.
Description
Technical Field
The invention relates to an f35mm mechanical passive athermalization lens and an assembling method thereof.
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 remote and all-weather observation, and is particularly suitable for target detection at night and under adverse weather conditions.
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, and the imaging performance of the lens is influenced finally. Since the refractive index temperature coefficient of the infrared optical material is large, severe changes in the operating temperature can have a serious influence on the infrared optical system. To adapt to a particular application, the lens is also required to have temperature adaptability and portability.
Disclosure of Invention
The invention improves the problems, namely the technical problems to be solved by the invention are that the existing temperature causes the power change and the optimal image plane to shift, thereby reducing the optical imaging quality.
The specific embodiment of the invention is as follows: f35mm mechanical passive athermalization camera lens, including the lens cone, follow that light goes into setting gradually from left to right in the lens cone and be provided with negative lens A, negative perspective B, positive lens C, the air interval between negative lens A and the negative lens B is 6.16mm, and the air interval between negative lens B and the positive lens C is 10.3 mm.
Further, the curvature radius of each surface of the inner edge light ray from the left to the right negative lens A, the negative transparent lens B and the positive lens C is 27.68mm, 53.57 mm, 34.41 mm, 14.84 mm, 72.48 mm and 109.13 mm in sequence.
Furthermore, the main lens cone is internally provided with a step surface embedded with a negative lens A, a negative lens B and a positive lens C, the front end of the main lens cone is fixed with a decoration ring, the front side of the negative lens A in the main lens cone is fixed with an A-piece pressing ring, the front side of the negative lens B in the main lens cone is fixed with a B-piece pressing ring, and a BC space ring is arranged between the negative lens B and the positive lens C in the main lens cone.
Furthermore, the lens barrel comprises a main lens barrel and an outer cover fixed outside the main lens barrel, a focusing cam is fixed outside the outer cover in a sleeved mode, and a focusing ring driving the focusing cam to move in a threaded fit mode is matched outside the focusing cam.
The invention also comprises a f35mm mechanical passive athermalization lens assembling method, which is characterized in that a negative lens A, a negative perspective B and a positive lens C are arranged in the lens cone along the light ray from left to right in sequence, the air interval between the negative lens A and the negative lens B is 6.16mm, the air interval between the negative lens B and the positive lens C is 10.3mm, a step surface embedded with the negative lens A, the negative perspective B and the positive lens C is arranged in the main lens cone, the front end of the main lens cone is fixed with a decorative ring, an A sheet pressing ring is fixed at the front side of the negative lens A in the main lens cone, a B sheet pressing ring is fixed at the front side of the negative perspective B in the main lens cone, a BC sheet pressing ring is arranged between the negative lens B and the positive lens C in the main lens cone, the positive perspective C, BC sheet and the negative lens B are sequentially assembled from the rear end of the lens cone and pass through the B sheet pressing ring and are fixed, the negative lens A is assembled at the front side of the lens cone from the front end of the lens cone, and the lens is fixed by an A-piece pressing ring, and the A-piece pressing ring and the negative lens A are sealed by silica gel.
Compared with the prior art, the invention has the following beneficial effects: the invention has the advantages of compact structure, short lens structure length, convenient carrying and high transmittance, reasonably distributes focal power in optical design, realizes the optical athermalization characteristic of temperature self-adaptation, can be adapted to a long-wave infrared uncooled 640 multiplied by 512 and 12 mu m detector, and performs the live recording and monitoring tasks. The manufacturing cost is low, and the method is suitable for large-scale production.
Drawings
Fig. 1 is a schematic view of a mechanical structure of an optical lens according to an embodiment of the invention.
FIG. 2 is a schematic diagram of an optical system according to an embodiment of the present invention.
In the figure: 1-decorative ring, 2-outer cover, 3-main lens cone, 4-focusing ring, 5-focusing cam, 6-image surface, 7-bayonet seat, 8-negative lens A, 9-A pressing ring, 10-B pressing ring, 11-negative lens B, 12-BC space ring, 13-support frame and 14-positive lens C.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the f35mm mechanical passive athermalization lens comprises a lens barrel, wherein a negative lens a, a negative lens B and a positive lens C are arranged in the lens barrel along the light from left to right in sequence, the air interval between the negative lens a and the negative lens B is 6.16mm, and the air interval between the negative lens B and the positive lens C is 10.3 mm.
In the embodiment, the curvature radius of each surface of the inner edge light ray from the left to the right negative lens A, the negative transparent lens B and the positive lens C is 27.68mm, 53.57 mm, 34.41 mm, 14.84 mm, 72.48 mm and 109.13 mm in sequence.
The specific parameters in this embodiment are as follows
The specific parameters of each lens are as follows, S1 and S2 … show the distance between the center of each surface of the negative lens A, the negative lens B and the positive lens C from left to right along the light ray, the air space indicates the distance between the center of the surface and the next surface, and the material represents the material of the corresponding lens.
In this embodiment, the main lens cone is provided with the step face of embedding negative lens a, negative lens perspective B, positive lens C in, the front end of main lens cone is fixed with decorates the ring, it is fixed with a piece clamping ring to be located negative lens a front side in the main lens cone, negative lens perspective B front side is fixed with B piece clamping ring in the main lens cone, it is equipped with the BC space ring to be located between negative lens B and the positive lens C in the main lens cone, and in this embodiment, negative lens a carries on spacingly through main lens cone a piece clamping ring, adopts silica gel to seal between a piece clamping ring and the negative lens a, has good sealing performance.
In this embodiment, on the premise of ensuring compact structure, a series of measures are taken to improve the vibration and impact resistance of the lens and ensure the use requirements of the system.
In this embodiment, the lens barrel includes a main lens barrel and an outer cover fixed to an exterior of the main lens barrel, the main lens barrel and the outer cover are in threaded fit, a focusing cam is fixed to an outer cover of the outer cover, and a focusing ring for driving the focusing cam to move in threaded fit is fitted to an exterior of the focusing cam.
The rear part of the outer cover is provided with a bayonet seat used for being connected with a camera.
In the present embodiment, the optical passive athermalization in the optical design utilizes the difference between the characteristics of the optical materials, and eliminates the influence of temperature by the combination of different characteristic materials. Ensure the image quality to be stable in a larger temperature range and realize the optics without thermalization.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: 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, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (7)
- The mechanical passive athermalization lens is characterized by comprising a lens barrel, wherein a negative lens A, a negative lens B and a positive lens C are arranged in the lens barrel along the light from left to right in sequence, the air interval between the negative lens A and the negative lens B is 6.16mm, and the air interval between the negative lens B and the positive lens C is 10.3 mm.
- 2. The f35mm mechanical passive athermalization lens of claim 1, wherein the radii of curvature of the surfaces of the inner edge ray left-to-right negative lens A, negative lens B and positive lens C are 27.68mm, 53.57 mm, 34.41 mm, 14.84 mm, 72.48 mm and 109.13 mm in this order.
- 3. The f35mm mechanical passive athermalization lens of claim 1, wherein the negative lens A, the negative lens B and the positive lens C are made of IRG206, zinc selenide and IRG206 respectively.
- 4. The f35mm mechanical passive athermalization lens of claim 1, wherein the main barrel has a step surface embedded with a negative lens a, a negative lens B and a positive lens C, a decoration ring is fixed to the front end of the main barrel, an a-piece pressing ring is fixed to the front side of the negative lens a in the main barrel, a B-piece pressing ring is fixed to the front side of the negative lens B in the main barrel, and a BC spacer is arranged between the negative lens B and the positive lens C in the main barrel.
- 5. The f35mm mechanical passive athermalization lens of claim 1, wherein the lens barrel comprises a main lens barrel and a housing fixed outside the main lens barrel, a focusing cam is fixed outside the housing, and a focusing ring for driving the focusing cam to move in a threaded fit is fitted outside the focusing cam.
- 6. The f35mm mechanical passive athermalization lens of claim 4, wherein: the rear part of the outer cover is provided with a bayonet.
- 7. An f35mm mechanical passive athermalization lens assembling method is characterized in that a negative lens A, a negative perspective B and a positive lens C are arranged in a lens barrel along the light ray from left to right in sequence, the air interval between the negative lens A and the negative lens B is 6.16mm, the air interval between the negative lens B and the positive lens C is 10.3mm, a step surface embedded with the negative lens A, the negative perspective B and the positive lens C is arranged in a main lens barrel, a decoration ring is fixed at the front end of the main lens barrel, an A sheet pressing ring is fixed at the front side of the negative lens A in the main lens barrel, a B sheet pressing ring is fixed at the front side of the negative perspective B in the main lens barrel, a BC space ring is arranged between the negative lens B and the positive lens C in the main lens barrel, the positive perspective C, BC space ring and the negative lens B are sequentially assembled from the rear end of the lens barrel and pass through the rear end of the lens barrel and are fixed by the B sheet pressing ring, the negative lens A is assembled into the front end of the lens barrel, and the lens is fixed by an A-piece pressing ring, and the A-piece pressing ring and the negative lens A are sealed by silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010891182.1A CN111999842A (en) | 2020-08-30 | 2020-08-30 | f35mm mechanical passive athermalization lens and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010891182.1A CN111999842A (en) | 2020-08-30 | 2020-08-30 | f35mm mechanical passive athermalization lens and assembling method thereof |
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| CN111999842A true CN111999842A (en) | 2020-11-27 |
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| CN202010891182.1A Pending CN111999842A (en) | 2020-08-30 | 2020-08-30 | f35mm mechanical passive athermalization lens and assembling method thereof |
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Citations (5)
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| CN206020789U (en) * | 2016-08-22 | 2017-03-15 | 福建福光天瞳光学有限公司 | F19mm long wave non-brake method optics is without transconversion into heat camera lens |
| CN109521542A (en) * | 2018-12-28 | 2019-03-26 | 福建福光天瞳光学有限公司 | The economical low distortion LONG WAVE INFRARED optics of one kind is without thermalization camera lens and its assembly method |
| CN109633873A (en) * | 2019-01-24 | 2019-04-16 | 福建福光天瞳光学有限公司 | Burnt infrared lens and its assembly method after a kind of long wavelength |
| CN110208920A (en) * | 2019-06-12 | 2019-09-06 | 福建福光天瞳光学有限公司 | A kind of long wave machinery is focused infrared lens and its assembly method without thermalization |
| CN209979913U (en) * | 2019-06-12 | 2020-01-21 | 福建福光天瞳光学有限公司 | Long-wave mechanical athermal focusing infrared lens |
-
2020
- 2020-08-30 CN CN202010891182.1A patent/CN111999842A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206020789U (en) * | 2016-08-22 | 2017-03-15 | 福建福光天瞳光学有限公司 | F19mm long wave non-brake method optics is without transconversion into heat camera lens |
| CN109521542A (en) * | 2018-12-28 | 2019-03-26 | 福建福光天瞳光学有限公司 | The economical low distortion LONG WAVE INFRARED optics of one kind is without thermalization camera lens and its assembly method |
| CN109633873A (en) * | 2019-01-24 | 2019-04-16 | 福建福光天瞳光学有限公司 | Burnt infrared lens and its assembly method after a kind of long wavelength |
| CN110208920A (en) * | 2019-06-12 | 2019-09-06 | 福建福光天瞳光学有限公司 | A kind of long wave machinery is focused infrared lens and its assembly method without thermalization |
| CN209979913U (en) * | 2019-06-12 | 2020-01-21 | 福建福光天瞳光学有限公司 | Long-wave mechanical athermal focusing infrared lens |
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