CN115268017B - Large-aperture high-resolution offshore observation optical system with strong adaptability - Google Patents
Large-aperture high-resolution offshore observation optical system with strong adaptability Download PDFInfo
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- CN115268017B CN115268017B CN202210793652.XA CN202210793652A CN115268017B CN 115268017 B CN115268017 B CN 115268017B CN 202210793652 A CN202210793652 A CN 202210793652A CN 115268017 B CN115268017 B CN 115268017B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 60
- 238000003384 imaging method Methods 0.000 claims abstract description 11
- 238000004026 adhesive bonding Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 239000005331 crown glasses (windows) Substances 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
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Abstract
The invention relates to a high-aperture high-resolution offshore observation optical system with strong adaptability, which comprises a front lens group A, a diaphragm B, a rear lens group and an optical filter D which are sequentially arranged along the light incidence direction, wherein the front lens group A comprises a positive crescent lens A-1, a negative crescent lens A-2, a first bonding lens group which is closely connected by a biconcave lens A-3 and a biconcave lens A-4, and a second bonding lens group which is closely connected by a biconvex lens A-5 and a biconcave lens A-6; the rear lens group C comprises a third glued lens group, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light and are closely connected with the biconcave lens C-1 and the biconvex lens C-2. The invention provides a lens with a maximum image surface of phi 17.6 mm and F# of 2.0, which adopts ten spherical lenses, has the total length of the system of less than 85 mm, the distortion of less than 2.1 percent, high optical resolution, good imaging effect of visible light and near infrared wave bands, satisfies the offshore long-distance day and night observation, and has greater compatibility for the change of offshore navigation environment.
Description
Technical field:
the invention relates to a large-aperture high-resolution offshore observation optical system with strong adaptability.
The background technology is as follows:
the ocean covers more than 70% of the area of the earth's surface and is therefore indistinguishable from weather and climate change. There is an exchange of energy between the ocean and the atmosphere, which causes a phenomenon in which the marine meteorological environment becomes huge due to such interaction. The potentially changing environment is a main factor affecting navigation safety, such as light intensity change, temperature change caused by heavy fog weather and cloudy weather, etc., and in order to adapt to the continuously changing environment, an optical system capable of remote detection and identification is needed to expand the environment observation which is not suitable for people to directly participate in. The current similar offshore observation lenses in the market have no environmental adaptability, smaller aperture, insufficient resolution or no requirement for remote detection.
The invention comprises the following steps:
the invention aims at improving the problems existing in the prior art, namely the technical problem to be solved by the invention is to provide the large-aperture high-resolution offshore observation optical system with strong adaptability, which has the advantages of simple structure, convenient use and greater compatibility to the change of the offshore navigation environment.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the large-aperture high-resolution offshore observation optical system with strong adaptability comprises a front lens group A, a diaphragm B, a rear lens group C and an optical filter D which are sequentially arranged along the incidence direction of light rays from left to right, wherein the front lens group A comprises a positive crescent lens A-1, a negative crescent lens A-2, a first bonding lens group which is closely connected with a biconcave lens A-3 and a biconvex lens A-4, and a second bonding lens group which is closely connected with a biconcave lens A-6 by a biconvex lens A-5; the rear lens group C comprises a third glued lens group, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light rays from left to right and are tightly connected with the biconcave lens C-2.
Further, the air gap between the front lens group a and the rear lens group C is 7.57-mm.
Further, the air interval between the positive crescent lens A-1 and the negative crescent lens A-2 is 3.51 mm; the air interval between the negative crescent lens A-2 and the first glued lens group is 7.63 and mm; the air interval between the first bonding lens group and the second bonding lens group is 0.1 mm; the air interval between the third gluing lens group and the biconvex lens C-3 is 0.1 mm; the air gap between the lenticular lens C-3 and the lenticular lens C-4 is 9.93 mm.
Further, in the front lens group A, the surface of the biconcave lens A-6, which is close to the diaphragm B, is curved towards the image side; in the rear lens group C, a surface of the biconcave lens C-1 near the stop B is curved toward the object side.
Further, the optical system satisfies: 0.03.ltoreq.fc/fa.ltoreq.0.06, where fa is the focal length of the front lens group A and fc is the focal length of the rear lens group C.
Further, the ratio of the focal length fa of the front lens group a to the effective focal length f of the entire optical system satisfies: the ratio of the focal length fc of the rear lens group C to the effective focal length f of the whole optical system is 14.5-18.0, and the ratio is as follows: fc/f is more than or equal to 0.60 and less than or equal to 0.75.
Further, at least two lenses in the optical system are made of dense phosphorus crown glass material, and at least one lens is made of low-dispersion glass H-ZPK.
Further, the ratio of the rear intercept FL of the optical system to the effective focal length f of the entire optical system satisfies: FL/f is more than or equal to 0.4 and less than or equal to 0.55.
Further, the maximum image matching surface of the optical system is 17.6 and mm, the observation field angle is larger than 28.4 degrees, the distortion is smaller than 2.1 percent, and the total length is smaller than 85 mm.
The other technical scheme adopted by the invention is as follows: an imaging method of a large aperture high resolution marine observation optical system with strong adaptability comprises the following steps of: the light rays sequentially pass through the positive crescent lens A-1, the negative crescent lens A-2, the first bonding lens group tightly connected by the biconcave lens A-3 and the biconvex lens A-4, the second bonding lens group tightly connected by the biconvex lens A-5 and the biconcave lens A-6, the diaphragm B, the third bonding lens group tightly connected by the biconvex lens C-1 and the biconcave lens C-2, the biconvex lens C-3, the biconvex lens C-4 and the optical filter D from left to right, and then imaging is carried out.
Compared with the prior art, the invention has the following effects: the invention has reasonable design, provides the lens with the maximum image surface reaching phi 17.6 mm and F# of 2.0, adopts ten spherical lenses, has the total length of the system of less than 85 mm, the distortion of less than 2.1 percent, has high optical resolution, good imaging effect of visible light and near infrared wave bands, satisfies offshore long-distance day and night observation, and has greater compatibility for the change of offshore navigation environment.
Description of the drawings:
FIG. 1 is a schematic view of an optical system configuration of an embodiment of the present invention;
FIG. 2 is a graph of the modulation transfer function of an optical system at room temperature in an embodiment of the present invention;
FIG. 3 is a graph showing the near infrared modulation transfer function at room temperature of an optical system according to an embodiment of the present invention;
FIG. 4 is a graph showing distortion curves of an optical system in an embodiment of the present invention;
FIG. 5 is a graph of relative illuminance of an optical system according to an embodiment of the present invention.
The specific embodiment is as follows:
the invention will be described in further detail with reference to the drawings and the detailed description.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As shown in FIG. 1, the high-resolution marine observation optical system with strong adaptability comprises a front lens group A, a diaphragm B, a rear lens group C and an optical filter D which are sequentially arranged along the incidence direction of light rays from left to right, wherein the front lens group A comprises a positive crescent lens A-1, a negative crescent lens A-2, a first bonding lens group which is closely connected with a biconcave lens A-3 and a biconvex lens A-4, and a second bonding lens group which is closely connected with a biconcave lens A-6 by a biconvex lens A-5; the rear lens group C comprises a third glued lens group, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light rays from left to right and are tightly connected with the biconcave lens C-2.
In this embodiment, the air gap between the front lens group a and the rear lens group C is 7.57 and mm.
In this embodiment, the air space between the positive crescent lens A-1 and the negative crescent lens A-2 is 3.51 mm; the air interval between the negative crescent lens A-2 and the first glued lens group is 7.63 and mm; the air interval between the first bonding lens group and the second bonding lens group is 0.1 mm; the air interval between the third gluing lens group and the biconvex lens C-3 is 0.1 mm; the air gap between the lenticular lens C-3 and the lenticular lens C-4 is 9.93 mm.
In this embodiment, in the front lens group a, the surface of the biconcave lens a-6 near the stop B is curved toward the image side, that is: the front group a is curved toward the image side closest to the stop B. In the rear lens group C, a surface of the biconcave lens C-1, which is close to the stop B, is curved toward the object side, that is: the object-side surface of the rear lens group C closest to the diaphragm B is curved.
In this embodiment, the optical system satisfies: 0.03.ltoreq.fc/fa.ltoreq.0.06, where fa is the focal length of the front lens group A and fc is the focal length of the rear lens group C.
In this embodiment, the ratio of the focal length fa of the front lens group a to the effective focal length f of the entire optical system satisfies: the ratio of the focal length fc of the rear lens group C to the effective focal length f of the whole optical system is 14.5-18.0, and the ratio is as follows: fc/f is more than or equal to 0.60 and less than or equal to 0.75.
In this embodiment, at least two lenses in the optical system are made of dense corona glass material, and at least one lens is made of low-dispersion glass H-ZPK 5. Preferably, the biconvex lens A-5 and the biconvex lens C-2 are made of H-ZPK and H-ZPK A materials respectively, and the glass material of the orthodontic lens A-1 is H-ZLAF76.
In this embodiment, the ratio of the rear intercept FL of the optical system to the effective focal length f of the entire optical system satisfies: FL/f is more than or equal to 0.4 and less than or equal to 0.55.
In this embodiment, the maximum image plane matched by the optical system is 17.6 mm, the viewing angle is greater than 28.4 °, the distortion is less than 2.1%, and the total length is less than 85 mm.
In this embodiment, the positive crescent lens A-1 has a thickness of 5.51 and mm, the negative crescent lens A-2 has a thickness of 1.0 and mm, the first cemented lens group has a thickness of 6.28 and mm, the second cemented lens group has a thickness of 10.12 and mm, the third cemented lens group has a thickness of 6.08 and mm, the lenticular lens C-3 has a thickness of 3.60 and mm, and the lenticular lens C-4 has a thickness of 4.33 and mm.
In this embodiment, the optical system uses a filter switching pattern to adapt to different environmental changes, wherein the visible light filter has a thickness of 2 mm and the near infrared filter has a thickness of 1.89 mm.
In this embodiment, the modulation transfer function value of the optical system at the nyquist frequency is close to 0.3, and the imaging quality is good.
In this embodiment, referring to fig. 5, the relative illuminance of the optical system at the edge is greater than 80%.
In this example, specific parameters of each lens in the optical system are shown in table 1 below.
TABLE 1
In this embodiment, the technical indexes of the implementation of the optical system are as follows:
1. maximum image plane: 17.6 mm;
2. wavelength range: 400-1000nm;
3. focal length: 35.5 mm;
4. angle of view: 28.4 °;
5.F#：2.0；
6. distortion: 2.1%;
7. total optical length: 85 mm;
8. rear intercept: 17 mm;
9. optical weight: 70 g.
In this embodiment, when imaging: the light rays sequentially pass through the positive crescent lens A-1, the negative crescent lens A-2, the first bonding lens group tightly connected by the biconcave lens A-3 and the biconvex lens A-4, the second bonding lens group tightly connected by the biconvex lens A-5 and the biconcave lens A-6, the diaphragm B, the third bonding lens group tightly connected by the biconvex lens C-1 and the biconcave lens C-2, the biconvex lens C-3, the biconvex lens C-4 and the optical filter D from left to right, and then imaging is carried out.
The invention has the advantages that: aiming at the use requirement of offshore observation, the lens with the maximum image surface reaching phi 17.6 mm and F# of 2.0 is provided, ten spherical lenses are adopted, the total length of the system is less than 85 mm, the distortion is less than 2.1%, the optical resolution is high, the imaging effect of visible light and near infrared bands is good, the offshore long-distance day and night observation is met, the greater compatibility is provided for the change of the offshore navigation environment, and the task can be completed better and safer.
If the invention discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto 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 embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (8)
1. An offshore observation optical system with strong adaptability and large aperture and high resolution, which is characterized in that: the front lens group A consists of a positive crescent lens A-1, a negative crescent lens A-2, a first gluing lens group closely connected with a biconcave lens A-3 and a biconcave lens A-4, and a second gluing lens group closely connected with a biconcave lens A-6, wherein the positive crescent lens A-1, the negative crescent lens A-2, the first gluing lens group closely connected with the biconcave lens A-3 and the biconcave lens A-4 are sequentially arranged along the incidence direction of light rays from left to right; the rear lens group C consists of a third glued lens group, a biconvex lens C-3 and a biconvex lens C-4 which are sequentially arranged along the incidence direction of light rays from left to right and are tightly connected with the biconcave lens C-1 and the biconvex lens C-2;
the optical system satisfies: 0.03.ltoreq.fc/fa.ltoreq.0.06, where fa is the focal length of the front lens group A and fc is the focal length of the rear lens group C;
the ratio of the focal length fa of the front lens group A to the effective focal length f of the whole optical system is as follows: the ratio of the focal length fc of the rear lens group C to the effective focal length f of the whole optical system is 14.5-18.0, and the ratio is as follows: fc/f is more than or equal to 0.60 and less than or equal to 0.75.
2. The large aperture high resolution marine observation optical system with strong adaptability according to claim 1, characterized in that: the air gap between the front lens group a and the rear lens group C is 7.57. 7.57 mm.
3. The large aperture high resolution marine observation optical system with strong adaptability according to claim 1, characterized in that: the air interval between the positive crescent lens A-1 and the negative crescent lens A-2 is 3.51 and mm; the air interval between the negative crescent lens A-2 and the first glued lens group is 7.63 and mm; the air interval between the first bonding lens group and the second bonding lens group is 0.1 mm; the air interval between the third gluing lens group and the biconvex lens C-3 is 0.1 mm; the air gap between the lenticular lens C-3 and the lenticular lens C-4 is 9.93 mm.
4. The large aperture high resolution marine observation optical system with strong adaptability according to claim 1, characterized in that: in the front lens group A, the surface of the biconcave lens A-6, which is close to the diaphragm B, is bent towards the image side; in the rear lens group C, a surface of the biconcave lens C-1 near the stop B is curved toward the object side.
5. The large aperture high resolution marine observation optical system with strong adaptability according to claim 1, characterized in that: at least two lenses in the optical system are made of dense phosphorus crown glass materials, and at least one lens is made of low-dispersion glass H-ZPK 5.
6. The large aperture high resolution marine observation optical system with strong adaptability according to claim 1, characterized in that: the ratio of the rear intercept FL of the optical system to the effective focal length f of the entire optical system satisfies: FL/f is more than or equal to 0.4 and less than or equal to 0.55.
7. The large aperture high resolution marine observation optical system with strong adaptability according to claim 1, characterized in that: the maximum image matching plane of the optical system is 17.6 mm, the observation field angle is larger than 28.4 degrees, the distortion is smaller than 2.1 percent, and the total length is smaller than 85 mm.
8. An imaging method of a large aperture high resolution offshore observation optical system with strong adaptability is characterized in that: comprising the use of a large aperture high resolution marine observation optical system with strong adaptability according to any one of claims 1 to 7, when imaging: the light rays sequentially pass through the positive crescent lens A-1, the negative crescent lens A-2, the first bonding lens group tightly connected by the biconcave lens A-3 and the biconvex lens A-4, the second bonding lens group tightly connected by the biconvex lens A-5 and the biconcave lens A-6, the diaphragm B, the third bonding lens group tightly connected by the biconvex lens C-1 and the biconcave lens C-2, the biconvex lens C-3, the biconvex lens C-4 and the optical filter D from left to right, and then imaging is carried out.
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| CN202210793652.XA CN115268017B (en) | 2022-07-07 | 2022-07-07 | Large-aperture high-resolution offshore observation optical system with strong adaptability |
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| CN202210793652.XA CN115268017B (en) | 2022-07-07 | 2022-07-07 | Large-aperture high-resolution offshore observation optical system with strong adaptability |
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| CN115268017B true CN115268017B (en) | 2023-07-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002131640A (en) * | 2000-10-27 | 2002-05-09 | Nidec Copal Corp | Zoom lens |
| JP5791480B2 (en) * | 2011-11-30 | 2015-10-07 | キヤノン株式会社 | Optical system and optical apparatus having the same |
| CN108828753A (en) * | 2018-09-04 | 2018-11-16 | 福建福光股份有限公司 | The big target surface low-light camera lens of small light and its imaging method |
| CN113960752B (en) * | 2021-10-13 | 2023-03-24 | 江西凤凰光学科技有限公司 | Small-distortion high-resolution fisheye lens |
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