CN112666684B - Radiation-resistant wide-angle lens - Google Patents
Radiation-resistant wide-angle lens Download PDFInfo
- Publication number
- CN112666684B CN112666684B CN202011536624.7A CN202011536624A CN112666684B CN 112666684 B CN112666684 B CN 112666684B CN 202011536624 A CN202011536624 A CN 202011536624A CN 112666684 B CN112666684 B CN 112666684B
- Authority
- CN
- China
- Prior art keywords
- lens
- meniscus lens
- negative meniscus
- radiation
- air space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lenses (AREA)
Abstract
The invention relates to a radiation-resistant wide-angle lens, wherein an optical system of the lens consists of a front lens group A, a diaphragm B and a rear lens group C which are sequentially arranged along a light path direction, wherein the front lens group A consists of a positive meniscus lens A-1, a negative meniscus lens A-2, a negative meniscus lens A-3, a negative meniscus lens A-4, a positive meniscus lens A-5 and a positive meniscus lens A-6 which are sequentially arranged along an incident light path; the rear lens group C is composed of a biconvex lens C-1, a negative meniscus lens C-2, a positive meniscus lens C-3 and a biconvex lens C-4 which are sequentially arranged along an incident light path. The radiation-resistant wide-angle lens is simple in structure, and the volume and the weight of the system are reduced by adopting a lightweight design; the wide field angle and the wide field depth range are clear for imaging; the radiation resistance is strong, the service life of the whole system is prolonged, and the system can stably and reliably operate in the external space and other radiation environments for a long time.
Description
Technical Field
The invention relates to a radiation-resistant wide-angle lens, and belongs to the technical field of photoelectric videos.
Background
In an environment with radiation particles, such as outer space, in the environment, electrons, protons and a small amount of high-energy cosmic ray particles can reduce the transmittance of the working waveband of a common optical glass material, so that the transmittance in the working waveband of the whole optical system is reduced, a detector cannot receive an optical signal of a monitoring target, the monitoring capability is influenced, and therefore a common optical lens cannot be suitable for long-term work in the radiation environment. Under these special circumstances, in order to reduce the protection cost for the device, it is desirable that the monitoring device has a small volume, a larger field of view, a wider monitoring range, a large depth of field, and a clear image of a target in a range from infinity to a close range.
Disclosure of Invention
In view of the above, the present invention provides a radiation-resistant wide-angle lens with simple structure, small size and strong radiation resistance, which has a large field angle and can form a clear image in a large depth of field.
The invention is realized by adopting the following scheme: a radiation-resistant wide-angle lens is characterized in that an optical system of the lens consists of a front lens group A, a diaphragm B and a rear lens group C which are sequentially arranged along a light path direction, wherein the front lens group A consists of a positive meniscus lens A-1, a negative meniscus lens A-2, a negative meniscus lens A-3, a negative meniscus lens A-4, a positive meniscus lens A-5 and a positive meniscus lens A-6 which are sequentially arranged along an incident light path; the rear lens group C is composed of a biconvex lens C-1, a negative meniscus lens C-2, a positive meniscus lens C-3 and a biconvex lens C-4 which are sequentially arranged along an incident light path.
Further, the air space between the front lens group A and the rear lens group C is 2.0mm, and the air space between the rear lens group C and the image plane is 1.6mm; in the front lens group A, the air space between the positive meniscus lens A-1 and the negative meniscus lens A-2 is 0.1mm, the air space between the negative meniscus lens A-2 and the negative meniscus lens A-3 is 1.0mm, the air space between the negative meniscus lens A-3 and the negative meniscus lens A-4 is 1.0mm, the air space between the negative meniscus lens A-4 and the positive meniscus lens A-5 is 0.5mm, and the air space between the positive meniscus lens A-5 and the positive meniscus lens A-6 is 1.2mm; in the rear lens group C, the air space between the biconvex lens C-1 and the negative meniscus lens C-2 is 0.1mm, the air space between the negative meniscus lens C-2 and the positive meniscus lens C-3 is 0.2mm, and the air space between the positive meniscus lens C-3 and the biconvex lens C-4 is 0.1mm.
Further, the focal length f' of the lens and the focal length f of the front lens group A A ' satisfy the relation: f is not less than 20 A '/f' is less than or equal to 25; focal length f' of lens and focal length f of rear lens group C C ' satisfy the relation: fC '/f' is more than or equal to 2.5 and less than or equal to 3; focal length f of positive meniscus lens A-1 1 ' and the length L of the first mirror surface of the lens to the imaging surface on the optical axis satisfies the relation: f is not less than 30 1 '/L is less than or equal to 36; focal length f' of lens and distance L of lens capable of forming image clearly at the nearest Object distance Satisfies the relation: l is Object distance / f′≤35。
Compared with the prior art, the invention has the following beneficial effects: the radiation-resistant wide-angle lens is simple in structure, and the volume and the weight of the system are reduced by adopting a lightweight design; the imaging device adopts 10 fully-separated spherical lenses and a full-transmission optical structure, has a larger field angle and a large depth-of-field range and is used for clear imaging; the Schott radiation-resistant glass is made of LAK9G15 and SF6G05, damage of radiation of electrons, protons, space high-energy rays and particles to an optical lens and a rear-end image sensor can be greatly reduced, the radiation resistance is strong, the service life of the whole system is prolonged, and the Schott radiation-resistant glass can stably and reliably operate in external space and other radiation environments for a long time; by selecting reasonable glass material combination, the radiation-resistant wide-angle lens has good heat difference elimination capability, keeps the imaging quality from being reduced within the temperature range of-40 ℃ to +60 ℃, and meets the use requirement under the environment with large temperature difference.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail by the following embodiments and the related drawings.
Drawings
FIG. 1 is a view showing the structure of an optical system of a lens barrel according to the present invention;
FIG. 2 is a distortion plot of an embodiment of the present invention;
FIG. 3 is a graph of MTF for an object distance of the present invention at infinity;
FIG. 4 is a graph of MTF for an object distance of 35mm according to the present invention;
Detailed Description
As shown in fig. 1 to 4, an optical system of a radiation-resistant wide-angle lens comprises a front lens group a, a diaphragm B and a rear lens group C which are sequentially arranged along a light path direction, wherein the front lens group a comprises a positive meniscus lens a-1, a negative meniscus lens a-2, a negative meniscus lens a-3, a negative meniscus lens a-4, a positive meniscus lens a-5 and a positive meniscus lens a-6 which are sequentially arranged along an incident light path; the rear lens group C is composed of a biconvex lens C-1, a negative meniscus lens C-2, a positive meniscus lens C-3 and a biconvex lens C-4 which are sequentially arranged along an incident light path. The radiation-resistant wide-angle lens adopts 10 fully-separated spherical lenses and a full-transmission optical structure, has a larger field angle, well corrects various aberrations, and realizes clear imaging in a large depth of field range.
In this embodiment, the air space between the front lens group a and the rear lens group C is 2.0mm, and the air space between the rear lens group C and the image plane is 1.6mm; in the front lens group A, the air space between the positive meniscus lens A-1 and the negative meniscus lens A-2 is 0.1mm, the air space between the negative meniscus lens A-2 and the negative meniscus lens A-3 is 1.0mm, the air space between the negative meniscus lens A-3 and the negative meniscus lens A-4 is 1.0mm, the air space between the negative meniscus lens A-4 and the positive meniscus lens A-5 is 0.5mm, and the air space between the positive meniscus lens A-5 and the positive meniscus lens A-6 is 1.2mm; the air space between the double convex lens C-1 and the negative meniscus lens C-2 in the rear lens group C is 0.1mm, the air space between the negative meniscus lens C-2 and the positive meniscus lens C-3 is 0.2mm, and the air space between the positive meniscus lens C-3 and the double convex lens C-4 is 0.1mm.
In this embodiment, the focal length f' of the lens and the focal length f of the front lens group A A ' satisfy the relation: f is not less than 20 A '/f' is less than or equal to 25; focal length f' of lens and focal length f of rear lens group C C ' satisfy the relation: fC '/f' is more than or equal to 2.5 and less than or equal to 3; focal length f of positive meniscus lens A-1 1 ' and the length L of the first mirror surface of the lens to the imaging surface on the optical axis satisfies the relation: f is not less than 30 1 '/L is less than or equal to 36; focal length f' of lens and distance L of lens capable of forming image clearly at the nearest Object distance Satisfy the relation: l is a radical of an alcohol Object distance / f′≤35。
The specific parameters of each lens in the lens optical system of the invention are as follows:
the optical system composed of the lens achieves the following optical indexes:
1. focal length: f' =1mm;
2. the field angle: 90 ° × 70 °;
3. clear imaging range: 35mm to infinity;
4. spectral range: 450 nm-700 nm;
5. distortion: distortion is less than or equal to 6 percent;
the lens material of the radiation-resistant wide-angle lens is made of Schott radiation-resistant glass LAK9G15 and SF6G05, so that the damage of radiation of electrons, protons, space high-energy rays and particles to an optical lens and a rear-end image sensor can be greatly reduced, the service life of the whole system is prolonged, and the wide-angle lens can stably and reliably operate in radiation environments such as outer space for a long time; the light weight design is adopted, so that the volume and the weight of the system are reduced; by selecting reasonable glass material combination, the radiation-resistant wide-angle lens has good heat difference elimination capability, keeps the imaging quality from being reduced within the temperature range of-40 ℃ to +60 ℃, and meets the use requirement under the environment with large temperature difference. The imaging device can be applied to a radiation environment, and has the characteristics of simple structure, small volume, strong radiation resistance, larger field angle and clear imaging in a large field depth range.
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 effects which can be achieved. Since the number is large and cannot be exhaustive, some of the numbers are disclosed to exemplify the technical solutions of the present invention, and the above-mentioned numbers 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 aspect of the present disclosure for indicating positional relationship or shape include, unless otherwise stated, states or shapes similar, analogous or approximate thereto.
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 of the embodiments of the invention or equivalent substitutions for parts of the technical features are possible; 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 (2)
1. A radiation-resistant wide-angle lens is characterized in that: the optical system of the lens consists of a front lens group A, a diaphragm B and a rear lens group C which are sequentially arranged along the direction of an optical path, wherein the front lens group A consists of a positive meniscus lens A-1, a negative meniscus lens A-2, a negative meniscus lens A-3, a negative meniscus lens A-4, a positive meniscus lens A-5 and a positive meniscus lens A-6 which are sequentially arranged along an incident optical path; the rear lens group C consists of a biconvex lens C-1, a negative meniscus lens C-2, a positive meniscus lens C-3 and a biconvex lens C-4 which are sequentially arranged along an incident light path; the positive meniscus lens A-1 and the negative meniscus lens A-2 are made of Schott radiation-resistant glass LAK9G15, and the negative meniscus lens C-2 is made of Schott radiation-resistant glass SF6G 05; the focal length f' of the lens and the focal length f of the front lens group A A ' satisfy the relation: f is not less than 20 A '/f' is less than or equal to 25; focal length f' of lens and focal length f of rear lens group C C ' satisfy the relation: fC '/f' is more than or equal to 2.5 and less than or equal to 3; focal length f' of lens and distance L of lens capable of forming image clearly at the nearest Object distance Satisfy the relation: l is Object distance F' is less than or equal to 35; the specific parameters of each lens in the lens optical system are shown in the following table:
2. the radiation tolerant wide-angle lens of claim 1, wherein: the air space between the front lens group A and the rear lens group C is 2.0mm, and the air space between the rear lens group C and the image surface is 1.6mm; in the front lens group A, the air space between the positive meniscus lens A-1 and the negative meniscus lens A-2 is 0.1mm, the air space between the negative meniscus lens A-2 and the negative meniscus lens A-3 is 1.0mm, the air space between the negative meniscus lens A-3 and the negative meniscus lens A-4 is 1.0mm, the air space between the negative meniscus lens A-4 and the positive meniscus lens A-5 is 0.5mm, and the air space between the positive meniscus lens A-5 and the positive meniscus lens A-6 is 1.2mm; the air space between the double convex lens C-1 and the negative meniscus lens C-2 in the rear lens group C is 0.1mm, the air space between the negative meniscus lens C-2 and the positive meniscus lens C-3 is 0.2mm, and the air space between the positive meniscus lens C-3 and the double convex lens C-4 is 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536624.7A CN112666684B (en) | 2020-12-23 | 2020-12-23 | Radiation-resistant wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536624.7A CN112666684B (en) | 2020-12-23 | 2020-12-23 | Radiation-resistant wide-angle lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112666684A CN112666684A (en) | 2021-04-16 |
| CN112666684B true CN112666684B (en) | 2023-01-31 |
Family
ID=75408118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011536624.7A Active CN112666684B (en) | 2020-12-23 | 2020-12-23 | Radiation-resistant wide-angle lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112666684B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271695A (en) * | 2006-03-30 | 2007-10-18 | Fujinon Corp | Zoom lens for projection and projection type display device |
| CN107783257A (en) * | 2017-10-26 | 2018-03-09 | 福建福光股份有限公司 | Big scene depth space radioresistance camera lens |
| CN110058384A (en) * | 2019-05-30 | 2019-07-26 | 浙江大华技术股份有限公司 | A kind of camera lens |
| CN209167646U (en) * | 2018-12-03 | 2019-07-26 | 福建福光股份有限公司 | Low distortion wide-angle lens |
| CN111897111A (en) * | 2020-09-02 | 2020-11-06 | 深圳融合光学科技有限公司 | 8mm day and night large-light-transmission large-target-surface prime lens and imaging method thereof |
-
2020
- 2020-12-23 CN CN202011536624.7A patent/CN112666684B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271695A (en) * | 2006-03-30 | 2007-10-18 | Fujinon Corp | Zoom lens for projection and projection type display device |
| CN107783257A (en) * | 2017-10-26 | 2018-03-09 | 福建福光股份有限公司 | Big scene depth space radioresistance camera lens |
| CN209167646U (en) * | 2018-12-03 | 2019-07-26 | 福建福光股份有限公司 | Low distortion wide-angle lens |
| CN110058384A (en) * | 2019-05-30 | 2019-07-26 | 浙江大华技术股份有限公司 | A kind of camera lens |
| CN111897111A (en) * | 2020-09-02 | 2020-11-06 | 深圳融合光学科技有限公司 | 8mm day and night large-light-transmission large-target-surface prime lens and imaging method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112666684A (en) | 2021-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111830672B (en) | Optical lens and imaging apparatus | |
| CN112285878A (en) | Low distortion fisheye lens | |
| US20230003973A1 (en) | Imaging optical system and device | |
| CN109239898B (en) | Compact coaxial refraction and reflection type telescope objective lens | |
| CN111239990B (en) | Optical lens and imaging apparatus | |
| CN112649951B (en) | Low-distortion wide-angle zoom lens | |
| CN112285884B (en) | 1.14mm ultra-wide angle optical system and imaging method thereof | |
| CN112666684B (en) | Radiation-resistant wide-angle lens | |
| CN112147759A (en) | Optical lens and electronic device | |
| CN115079379B (en) | Visible-near infrared optical system and optical lens | |
| CN107329236B (en) | Large-view-field anti-stray-light image pickup lens with anti-fog function | |
| CN109581635B (en) | Optical lens | |
| EP4109164A1 (en) | Optical camera system and optical camera device | |
| CN112748555B (en) | Optical lens and electronic device | |
| CN111007658B (en) | Low-cost athermal day and night lens and working method thereof | |
| CN110941086B (en) | Ultra-short low-distortion shimmer imaging optical system | |
| CN114624866A (en) | Super-wide-angle large-target-surface satellite-borne optical system and imaging method thereof | |
| CN111983778B (en) | Optical lens and imaging apparatus | |
| CN110501800B (en) | Optical lens | |
| CN112630941A (en) | Three-million-pixel optical lens and imaging method thereof | |
| CN112485896A (en) | All-glass all-metal security lens | |
| CN112305710A (en) | Optical lens and electronic device | |
| CN114994868B (en) | High-resolution long-focus broadband achromatic lens | |
| CN117031698B (en) | Multispectral wide-angle lens | |
| CN109884774B (en) | High-resolution large-view-field ultra-low-distortion optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |