CN115032776B - Long Jiao Changfa blue video lens - Google Patents
Long Jiao Changfa blue video lens Download PDFInfo
- Publication number
- CN115032776B CN115032776B CN202210619441.4A CN202210619441A CN115032776B CN 115032776 B CN115032776 B CN 115032776B CN 202210619441 A CN202210619441 A CN 202210619441A CN 115032776 B CN115032776 B CN 115032776B
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- lens group
- lens
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- changfa
- blue video
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- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 230000004075 alteration Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
- G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive
Abstract
The invention discloses a long Jiao Changfa blue video lens which is characterized by sequentially comprising a first lens group, an iris diaphragm and a second lens group along the incidence direction of light rays, wherein the first lens group and the second lens group both have positive focal power, the first lens group is a fixed group, and the second lens group is a focusing group capable of moving along an optical axis; the first lens group and the second lens group satisfy the following relationship: 0.45< f2/f1<0.55, f1 represents a focal length value of the first lens group, and f2 represents a focal length value of the second lens group. The camera module can realize large aperture and high resolution, small distortion and long flange back focus, close-range focusing and excellent chromatic aberration effects, meets the requirement of matching with a longer flange back focus, and can be widely applied to the optical lens industry.
Description
Technical Field
The invention relates to the field of optical lenses, in particular to a long Jiao Changfa blue video lens.
Background
With the development of society and technology, the demand of people for video shooting is increasing, so that higher requirements are also put on the product quality, the requirements and the like of video shots, and important indexes of long-focus video shots are large aperture, high resolution, small distortion and near-end shooting. Currently, the defects of insufficient resolution, insufficient large aperture, insufficient distortion, incapability of meeting near-end shooting and the like of a long Jiao Shipin lens exist in the market, and high requirements of long-focus video shooting market demands are not met, particularly a long-focus video lens with a focal length of 100 mm.
Disclosure of Invention
The present invention is directed to a long Jiao Changfa blue video lens that solves one or more of the problems of the prior art, and provides at least one of a beneficial choice or creation.
The technical scheme adopted for solving the technical problems is as follows:
the invention provides a long Jiao Changfa blue video lens which is characterized by sequentially comprising a first lens group, an iris diaphragm and a second lens group along the incidence direction of light rays, wherein the first lens group and the second lens group both have positive focal power, the first lens group is a fixed group, and the second lens group is a focusing group capable of moving along an optical axis;
the first lens group and the second lens group satisfy the following relationship:
0.45<f2/f1<0.55；
wherein f1 represents the focal length value of the first lens group, and f2 represents the focal length value of the second lens group.
As a further improvement of the above technical solution, the first lens group includes five lenses sequentially arranged along the optical axis, and the second lens group includes eight lenses sequentially arranged along the optical axis.
As a further improvement of the above technical solution, the refractive index of at least one lens of the first lens group is greater than 1.8 and less than 1.9.
As a further improvement of the above technical solution, the abbe number of at least one lens of the first lens group is greater than 90 and less than 100.
As a further improvement of the above technical solution, the first lens group includes at least two cemented lenses.
As a further improvement of the above technical solution, the refractive index of at least one lens of the second lens group is greater than 1.4 and less than 1.5.
As a further improvement of the above technical solution, the abbe number of the second lens group with at least three lenses is more than 20 and less than 30.
As a further improvement of the above technical solution, the second lens group includes at least two cemented lenses.
As a further improvement of the above technical solution, the total optical length of the lens is less than 149.7 mm and greater than 150.7 mm.
The beneficial effects of the invention are as follows: the focal power of the first lens group and the second lens group can realize large aperture and high resolution, small distortion and long flange back focus, close-range focusing and excellent chromatic aberration effect under the condition that the relation formula 0.45< f2/f1<0.55 is satisfied, and the camera module matched with the longer flange back focus is satisfied.
Drawings
The invention is further described below with reference to the drawings and examples;
FIG. 1 is a schematic view of an embodiment of a long Jiao Changfa blue video lens according to the present invention;
FIG. 2 is a schematic view of a longitudinal chromatic aberration of an embodiment of a long Jiao Changfa blue video lens according to the present invention;
FIG. 3 is a schematic diagram of a lateral chromatic aberration of an embodiment of a long Jiao Changfa blue video lens according to the present invention;
FIG. 4 is a diagram of field curvature and distortion of an embodiment of a long Jiao Changfa blue video lens according to the present invention;
FIG. 5 is a schematic view of an MTF defocus curve of an embodiment of a long Jiao Changfa blue video shot provided by the present invention;
FIG. 6 is a schematic illustration of MTF of an embodiment of a long Jiao Changfa blue video shot provided by the present invention;
fig. 7 is a schematic diagram of a long Jiao Changfa blue video lens according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus 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.
In the description of the present invention, if there is a word description such as "a plurality" or the like, the meaning of a plurality is one or more, and the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 7, the long Jiao Changfa blue video lens of the present invention makes the following embodiments:
as shown in fig. 1, the long Jiao Changfa blue video lens of the present embodiment includes a first lens group G1, an iris 100, and a second lens group G2, and the first lens group G1, the iris 100, and the second lens group G2 are sequentially arranged along a light incident direction.
The first lens group G1 is used as a fixed group, and the focal power is positive, the first lens group G1 includes five lenses, and the six lenses include a first lens body L1, a second lens body L2, a third lens body L3, a fourth lens body L4, and a fifth lens body L5, which are sequentially arranged along the optical axis.
The second lens group G2 is a focusing group, and the optical power is positive, the second lens group G2 is movable along the optical axis, and the second lens group G2 includes a sixth lens body L6, a seventh lens body L7, an eighth lens body L8, a ninth lens body L9, a tenth lens body L10, an eleventh lens body L11, a twelfth lens body L12, and a thirteenth lens body L13, which are sequentially arranged along the optical axis.
All lenses of the lens of this embodiment are standard spherical lenses.
The first lens group G1 and the second lens group G2 need to satisfy the following relationship:
0.45<f2/f1<0.55；
f1 represents a focal length value of the first lens group G1, and f2 represents a focal length value of the second lens group G2.
When the relation 0.45< f2/f1<0.55 is defined, if the relation is not satisfied, the back working distance of the optical system is too short, and the camera module matched with the back focus of the long flange cannot be satisfied.
The definition requirements for the first lens group G1 are as follows:
among the first, second, third, fourth, and fifth lens bodies L1, L2, L3, L4, and L5, at least one lens body has a refractive index greater than 1.8 and less than 1.9.
Among the first lens body L1, the second lens body L2, the third lens body L3, the fourth lens body L4, and the fifth lens body L5, at least one lens body has an abbe number greater than 90 and less than 100.
And, the first lens group G1 includes at least two cemented lenses, specifically: the first lens is formed by the first lens body L1 and the second lens body L2, and the second lens is formed by the third lens body L3 and the fourth lens body L4, so that the structure is compact, the resolution is improved, and the sensitivity of the tolerance of the assembly process is reduced.
The definition requirements for the second lens group G2 are as follows:
among the sixth lens body L6, the seventh lens body L7, the eighth lens body L8, the ninth lens body L9, the tenth lens body L10, the eleventh lens body L11, the twelfth lens body L12, and the thirteenth lens body L13, at least one lens body has a refractive index of more than 1.4 and less than 1.5.
Among the sixth lens body L6, the seventh lens body L7, the eighth lens body L8, the ninth lens body L9, the tenth lens body L10, the eleventh lens body L11, the twelfth lens body L12, and the thirteenth lens body L13, at least three lens bodies have an abbe number of more than 20 and less than 30.
Also, the second lens group G2 of the present embodiment includes at least two cemented lenses, specifically: the first lens is formed by the sixth lens L6 and the seventh lens L7, and the second lens is formed by the ninth lens L9 and the tenth lens L10, so that the structure is compact, the resolution is improved, and the tolerance sensitivity of the assembly process is reduced.
In the embodiment, four groups of cemented lenses are arranged, so that chromatic aberration is optimized, and a good chromatic aberration real shooting effect is achieved.
The last lens of the embodiment adopts a meniscus lens, wherein the concave surface faces the chip, which is helpful to enhance the anti-interference contact of the whole lens to the outside and prevent the damage of the lens caused by careless contact in the use process.
In addition, the total length between the front end mirror surface of the first lens body L1 and the rear end mirror surface of the thirteenth lens body L13 of the present embodiment is that the total lens optical length is less than 145.5 mm and greater than 144.5 mm.
The specific parameters of the long Jiao Changfa blue video shot in this embodiment are as follows:
wherein Surf represents a corresponding surface number in the optical system, type represents a Type of a surface, radius represents a Radius of curvature, thickness represents a Thickness, index represents a refractive Index, and ABB represents an ABB number.
According to fig. 2 to 7, it can be determined that the aberration correction of the optical system of the present invention is good, and the camera module satisfying high resolution, small distortion and satisfying the matching of the longer flange back focus is optimized.
According to the embodiment, the invention realizes the long focal length of 100mm, large aperture, small distortion, high resolution, long flange back focus and good chromatic aberration effect.
While the preferred embodiments of the present invention have been illustrated and described, the present invention is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present invention, and these are intended to be included in the scope of the present invention as defined in the appended claims.
Claims (2)
1. The long Jiao Changfa blue video lens is characterized by sequentially comprising a first lens group (G1), an iris diaphragm (100) and a second lens group (G2) along the light incidence direction, wherein the first lens group (G1) and the second lens group (G2) have positive focal power, the first lens group (G1) is a fixed group, and the second lens group (G2) is a focusing group capable of moving along an optical axis;
the first lens group (G1) and the second lens group (G2) satisfy the following relationship:
0.45<f2/f1<0.55；
wherein f1 represents a focal length value of the first lens group (G1), and f2 represents a focal length value of the second lens group (G2);
the first lens group (G1) comprises five lenses which are sequentially arranged along an optical axis, and the second lens group (G2) comprises eight lenses which are sequentially arranged along the optical axis;
the refractive index of at least one lens of the first lens group (G1) is more than 1.8 and less than 1.9;
the Abbe number of at least one lens of the first lens group (G1) is more than 90 and less than 100;
the first lens group (G1) comprises at least two cemented lenses;
the refractive index of at least one lens of the second lens group (G2) is more than 1.4 and less than 1.5;
the Abbe number of at least three lenses of the second lens group (G2) is more than 20 and less than 30;
the second lens group (G2) comprises at least two cemented lenses.
2. A long Jiao Changfa blue video camera lens according to claim 1, wherein: the lens has an optical total length of less than 149.7 millimeters and greater than 150.7 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210619441.4A CN115032776B (en) | 2022-06-01 | 2022-06-01 | Long Jiao Changfa blue video lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210619441.4A CN115032776B (en) | 2022-06-01 | 2022-06-01 | Long Jiao Changfa blue video lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115032776A CN115032776A (en) | 2022-09-09 |
| CN115032776B true CN115032776B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210619441.4A Active CN115032776B (en) | 2022-06-01 | 2022-06-01 | Long Jiao Changfa blue video lens |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582738B (en) * | 2023-07-13 | 2023-10-27 | 珠海市川富光学技术有限公司 | Long-focus large-aperture short-flange video lens with focal length of 85mm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000330020A (en) * | 1999-05-20 | 2000-11-30 | Asahi Optical Co Ltd | Endoscope objective variable power optical system |
| JP2008151949A (en) * | 2006-12-15 | 2008-07-03 | Nikon Corp | Wide angle lens, imaging apparatus, and focusing method of the wide angle lens |
| JP2016136211A (en) * | 2015-01-23 | 2016-07-28 | 株式会社ニコン | Optical system, imaging device having the same, and manufacturing method of optical system |
| CN111694135A (en) * | 2020-07-15 | 2020-09-22 | 北创光电科技(邵阳)有限公司 | Big wide angle video camera lens of focus 8mm |
| CN112327469A (en) * | 2020-09-21 | 2021-02-05 | 舜宇光学(中山)有限公司 | Imaging lens |
-
2022
- 2022-06-01 CN CN202210619441.4A patent/CN115032776B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000330020A (en) * | 1999-05-20 | 2000-11-30 | Asahi Optical Co Ltd | Endoscope objective variable power optical system |
| JP2008151949A (en) * | 2006-12-15 | 2008-07-03 | Nikon Corp | Wide angle lens, imaging apparatus, and focusing method of the wide angle lens |
| JP2016136211A (en) * | 2015-01-23 | 2016-07-28 | 株式会社ニコン | Optical system, imaging device having the same, and manufacturing method of optical system |
| CN111694135A (en) * | 2020-07-15 | 2020-09-22 | 北创光电科技(邵阳)有限公司 | Big wide angle video camera lens of focus 8mm |
| CN112327469A (en) * | 2020-09-21 | 2021-02-05 | 舜宇光学(中山)有限公司 | Imaging lens |
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| CN115032776A (en) | 2022-09-09 |
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