CN115421285A - Ultra-high-definition video zoom lens - Google Patents
Ultra-high-definition video zoom lens Download PDFInfo
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- CN115421285A CN115421285A CN202211079302.3A CN202211079302A CN115421285A CN 115421285 A CN115421285 A CN 115421285A CN 202211079302 A CN202211079302 A CN 202211079302A CN 115421285 A CN115421285 A CN 115421285A
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- 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
- G02B15/144—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 four groups only
- G02B15/1441—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 four groups only the first group being positive
- G02B15/144113—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 four groups only the first group being positive arranged +-++
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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
- 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
- G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
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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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Lenses (AREA)
Abstract
The invention discloses an ultra-high definition video zoom lens, which comprises a front fixed group A with positive focal power, the optical lens comprises a negative meniscus lens A-1, a double convex lens A-2 and a positive meniscus lens A-3 which are arranged in sequence from an object side to an image side; the zoom group B has negative focal power, is arranged between the front fixed group A and the image side, and comprises a negative meniscus lens B-1, a biconcave lens B-2, a biconvex lens B-3 and a biconcave lens B-4 which are arranged from the object side to the image side in sequence; an iris diaphragm C arranged between the zoom group B and the image side; the middle fixed group D has positive focal power, is arranged between the iris diaphragm C and the image side, and comprises a biconvex lens D-1, a negative meniscus lens D-2 and a negative meniscus lens D-3 which are arranged in sequence from the object side to the image side; the compensation group E has positive focal power, is arranged between the middle fixed group D and the image side and comprises a double convex lens E-1, a double convex lens E-2, a double concave lens E-3, a double convex lens E-4 and a negative meniscus lens E-5 which are sequentially arranged from the object side to the image side.
Description
Technical Field
The invention belongs to the technical field of lenses, and particularly relates to an ultrahigh-definition video zoom lens.
Background
With the development and application of video communication technology, high-quality video conference systems have become an indispensable part of human social and economic lives, the demand for video conference systems has not been limited to only those enterprises, governments and public institutions with higher information-based construction degree, and the demand has been expanded from internal communication of the institutions to external communication between the institutions.
With the progress of network technology, chip technology, system integration and other technologies, the back-end technology of the ultra-high-definition video system is gradually improved, and the lens resolution of the prior art is low, the imaging quality is low, and good image quality cannot be obtained. Therefore, how to properly design a lens to achieve good image quality has been a concern of lens designers.
Chinese patent No. 201810338602.6 discloses a zoom lens, which comprises in order from an object side to an image side: a positive first lens unit including a diffractive optical element, a negative second lens unit, a positive third lens unit including at least one positive lens, and a rear unit including one or more lenses, wherein an interval between adjacent lens units varies during zooming, and the zoom lens has an image pickup angle of view approximately equal to 70 ° at a wide-angle end and a zoom ratio of around 30. However, it still has the problems of low resolution, low imaging quality and failure to obtain good image quality.
Disclosure of Invention
The present invention provides an ultra-high-definition video zoom lens to solve the problems of low resolution, low imaging quality and poor image quality of the lens.
In order to achieve the purpose, the invention adopts the technical scheme that:
an ultra high definition video zoom lens, comprising:
the front fixed group A has positive focal power, and comprises a negative meniscus lens A-1, a double convex lens A-2 and a positive meniscus lens A-3 which are arranged in sequence from the object side to the image side;
the zoom group B has negative focal power and is arranged between the front fixed group A and the image side, and the zoom group B comprises a negative meniscus lens B-1, a biconcave lens B-2 and a biconvex lens B-3 and a biconcave lens B-4 which are arranged in sequence from the object side to the image side;
an iris diaphragm C disposed between the magnification-varying group B and the image side;
the middle fixed group D has positive focal power and is arranged between the iris diaphragm C and the image side, and the middle fixed group D comprises a double convex lens D-1, a negative meniscus lens D-2 and a negative meniscus lens D-3 which are arranged from the object side to the image side in sequence;
the compensation group E has positive focal power and is arranged between the middle fixed group D and the image side, and comprises a double convex lens E-1, a double convex lens E-2, a double concave lens E-3, a double convex lens E-4 and a negative meniscus lens E-5 which are sequentially arranged from the object side to the image side.
Furthermore, the biconvex lens B-3 and the biconcave lens B-4 are tightly adhered to form a first adhesive combination.
Furthermore, the double convex lens D-1 and the negative meniscus lens D-2 are tightly bonded to form a second bonding group.
Furthermore, the biconvex lens E-2 and the biconcave lens E-3 are closely bonded to form a third bonding group.
Further, when the lens barrel is from the wide-angle end to the telephoto end, the movement direction of the variable magnification group B is toward the imaging target surface, and the movement direction of the compensation group E is away from the imaging target surface.
Further, the moving range of the lens from the wide-angle end to the telephoto end zoom group B is 0.42-30.55 mm, namely, the interval between the front fixed group A and the zoom group B is 0.42-30.55 mm; the moving range of the compensation group E is 11.48-2.65 mm, namely the interval between the middle fixed group D and the compensation group E is 0.42-30.55 mm.
Further, the front fixed group a combined focal length satisfies: 53mm<f A <59mm；
The variable-magnification group B has the following combined focal length: -9.2mm<f B <-8.7mm；
The combined focal length of the middle fixed group D meets the following requirements: 40mm<f D <48mm；
The combined focal length of the intermediate compensation group E meets the following conditions: 35mm in diameter<f E <41mm。
Further, the air distance between the negative meniscus lens A-1 and the double convex lens A-2 is 1.96mm;
the air distance between the biconvex lens A-2 and the positive meniscus lens A-3 is 0.13mm;
and:
the air distance between the negative meniscus lens B-1 and the biconcave lens B-2 is 5.40mm;
the air distance between the biconcave lens B-2 and the first gluing set is 0.13mm;
and:
the air distance between the second gluing set and the negative meniscus lens D-3 is 0.20mm;
and:
the air distance between the biconvex lens E-1 and the third glue combination is 0.13mm;
the air distance between the third bonding group and the biconvex lens E-4 is 0.45mm;
the air distance between the biconvex lens E-4 and the negative meniscus lens E-5 was 0.30mm.
Furthermore, the negative meniscus lens B-1, the biconcave lens B-2 and the negative meniscus lens D-2 are all made of H-ZLAF89L; the material of the biconcave lens E-3 and the negative meniscus lens E-5 is H-ZLAF92.
The ultra-high-definition video zoom lens provided by the invention has the following beneficial effects:
the invention adopts the structural cooperation of the zoom group and the compensation group, effectively reduces the system aberration, obviously improves the resolution of the lens, and achieves a short-middle-focus of 800 ten thousand pixels and a whole of 500 ten thousand pixels.
The gluing pieces in the front fixing group A adopt a separation mode, so that the local surface shape difference and the deterioration of a glued negative film caused by a large-caliber gluing process problem can be avoided, and the assembling imaging quality of the medium and long coke is improved.
The zoom group, the middle fixed group and the compensation group of the invention use high-refractive-index materials, so that the system structure is more compact, and the resolution of the lens can be obviously improved under the condition of ensuring that the field angle, the distortion and the total length are basically unchanged.
Drawings
FIG. 1 is a schematic diagram of an optical system of the ultra-high definition video zoom lens of the present invention.
FIG. 2 is a graph of MTF at the shortest focal length W in accordance with the present invention.
FIG. 3 is a graph of the MTF at longest focus T of the present invention.
FIG. 4 is a Fan diagram Ray Fan at the shortest focus W of the present invention.
FIG. 5 is a Fan diagram Ray Fan at longest focal distance T according to the present invention.
FIG. 6 is a plot of the Spot Diagram at the shortest focal length W of the present invention.
FIG. 7 is a plot of the Spot Diagram for the longest focal length T of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
the front fixed group A has positive focal power, and comprises a negative meniscus lens A-1, a double convex lens A-2 and a positive meniscus lens A-3 which are arranged in sequence from the object side to the image side (arranged in sequence along the incident direction of light rays); the gluing piece in the front fixing group A of the embodiment adopts a separation mode, so that the local surface shape difference and deterioration of a gluing negative film caused by a large-caliber gluing process problem can be avoided, and the medium and long focus assembly imaging quality is improved.
The zoom group B has negative focal power and is arranged between the front fixed group A and the image side, and the zoom group B comprises a negative meniscus lens B-1, a biconcave lens B-2 and a biconvex lens B-3 and a biconcave lens B-4 which are arranged in sequence from the object side to the image side;
the main function of the addition of the biconcave lens B-2 in the variable power group B of the present embodiment is to correct the high-order aberrations such as the spherical aberration, coma aberration, axial chromatic aberration, and vertical axis chromatic aberration of the telephoto.
An iris diaphragm C disposed between the magnification-varying group B and the image side;
a middle fixed group D which has positive focal power and is configured between the variable diaphragm C and the image side, wherein the middle fixed group D comprises a biconvex lens D-1, a negative meniscus lens D-2 and a negative meniscus lens D-3 which are arranged from the object side to the image side in sequence; -
The compensation group E has positive focal power and is arranged between the middle fixed group D and the image side, and comprises a double convex lens E-1, a double convex lens E-2, a double concave lens E-3, a double convex lens E-4 and a negative meniscus lens E-5 which are sequentially arranged from the object side to the image side.
The embodiment adds the biconvex lens E-4 and the negative meniscus lens E-5 to better correct the system aberration and improve the imaging quality of the system.
In the embodiment, a front fixed group A with positive focal power, a zoom group B with negative focal power, an iris diaphragm C, a middle fixed group D with positive focal power, a compensation group E with positive focal power and an imaging target surface are sequentially arranged along the incident direction of light,
specifically, the biconvex lens B-3 and the biconcave lens B-4 are tightly adhered to form a first adhesive assembly.
The biconvex lens D-1 and the negative meniscus lens D-2 are tightly connected and glued to form a second gluing group.
The biconvex lens E-2 and the biconcave lens E-3 are tightly connected and glued to form a third gluing set.
When the lens is from the wide-angle end to the telephoto end, the movement direction of the variable magnification group B moves towards the imaging target surface, and the movement direction of the compensation group E moves away from the imaging target surface.
The moving range of the lens from the wide-angle end to the telephoto end zoom group B is 0.42-30.55 mm, namely the interval between the front fixed group A and the zoom group B is 0.42-30.55 mm; the moving range of the compensation group E is 11.48-2.65 mm, namely the interval between the middle fixed group D and the compensation group E is 0.42-30.55 mm.
The front fixed group A combined focal length satisfies: 53mm<f A <59mm；
The combined focal length of the zoom group B meets the following requirements: -9.2mm<f B <-8.7mm；
The combined focal length of the middle fixed group D meets the following requirements: 40mm<f D <48mm；
The combined focal length of the intermediate compensation group E meets the following conditions: 35mm<f E <41mm。
The air distance between the negative meniscus lens A-1 and the biconvex lens A-2 is 1.96mm;
the air distance between the biconvex lens A-2 and the positive meniscus lens A-3 is 0.13mm;
and:
the air distance between the negative meniscus lens B-1 and the biconcave lens B-2 is 5.40mm;
the air distance between the biconcave lens B-2 and the first gluing set is 0.13mm;
and:
the air distance between the second gluing set and the negative meniscus lens D-3 is 0.20mm;
and:
the air distance between the biconvex lens E-1 and the third glue combination is 0.13mm;
the air distance between the third bonding group and the biconvex lens E-4 is 0.45mm;
the air distance between the biconvex lens E-4 and the negative meniscus lens E-5 was 0.30mm.
The negative meniscus lens B-1, the biconcave lens B-2 and the negative meniscus lens D-2 are all made of an ultrahigh-refractive-index material H-ZLAF89L, and the biconcave lens E-3 and the negative meniscus lens E-5 are all made of an ultrahigh-refractive-index material H-ZLAF92, so that the system structure is more compact, and the resolution of the lens can be obviously improved under the condition of ensuring that the field angle, the distortion and the total length are basically unchanged.
The physical parameters of each lens of this example meet the data requirements shown in table 1:
TABLE 1
As shown in the above table, the surfaces 1 and 2 correspond to the negative meniscus lens a-1, the surfaces 3 and 4 correspond to the double convex lens a-2, the surfaces 5 and 6 correspond to the positive meniscus lens a-3, the surfaces 7 and 8 correspond to the negative meniscus lens B-1, the surfaces 9 and 10 correspond to the double concave lens B-2, the surfaces 11, 12 and 13 correspond to the first bonding group, the surfaces 15, 16 and 17 correspond to the second bonding group, the surfaces 18 and 19 correspond to the negative meniscus lens D-3, the surfaces 20 and 21 correspond to the double convex lens E-1, the surfaces 22, 23 and 24 correspond to the third bonding group, the surfaces 25 and 26 correspond to the double convex lens E-4, and the surfaces 27 and 28 correspond to the negative meniscus lens E-5.
Front fixed group a: because the light on the long Jiao Duanzhou of the front fixed group A is not high (only half the height) and the light outside the short-focus end shaft is high, the glue piece in the front fixed group A is in a separation mode, the problems of field curvature, distortion and other aberrations of the short focus caused by a large field angle are solved preferentially, the local difference and the deterioration of the surface shape of a glued negative film caused by a large-caliber gluing process are avoided, and the assembly imaging quality of the middle and long focus is improved; the zoom group B and the compensation group E are complicated, the system aberration is effectively reduced, the resolution of the lens is obviously improved, the short-middle focus reaches 800 ten thousand pixels, and the whole lens reaches 500 ten thousand pixels; high-refractive-index materials are used for multiple times in the zoom group, the middle fixed group and the compensation group, so that the system structure is more compact, and the resolution of the lens is obviously improved under the condition of ensuring that the field angle, the distortion and the total length are basically unchanged.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive work within the scope of the appended claims.
Claims (9)
1. An ultra high definition video zoom lens, comprising:
the front fixed group A has positive focal power, and comprises a negative meniscus lens A-1, a double convex lens A-2 and a positive meniscus lens A-3 which are arranged in sequence from the object side to the image side;
a variable power group B having a negative focal power and disposed between the front fixed group A and the image side, the variable power group B including a negative meniscus lens B-1, a biconcave lens B-2, a biconvex lens B-3 and a biconcave lens B-4 arranged in order from the object side to the image side;
an iris diaphragm C disposed between the variable magnification group B and the image side;
an intermediate fixed group D having a positive refractive power and disposed between the iris diaphragm C and the image side, the intermediate fixed group D including a biconvex lens D-1, a negative meniscus lens D-2, and a negative meniscus lens D-3 arranged in order from the object side to the image side;
the compensation group E has positive focal power and is arranged between the middle fixed group D and the image side, and the compensation group E comprises a double convex lens E-1, a double convex lens E-2, a double concave lens E-3, a double convex lens E-4 and a negative meniscus lens E-5 which are arranged in sequence from the object side to the image side.
2. The ultra-high-definition video zoom lens according to claim 1, wherein: the biconvex lens B-3 and the biconcave lens B-4 are tightly connected and glued to form a first gluing group.
3. The ultra-high-definition video zoom lens according to claim 1, wherein: the biconvex lens D-1 and the negative meniscus lens D-2 are tightly connected and glued to form a second gluing set.
4. The ultra-high-definition video zoom lens according to claim 1, wherein: the biconvex lens E-2 and the biconcave lens E-3 are tightly connected and glued to form a third gluing set.
5. The ultra-high-definition video zoom lens according to claim 1, wherein: when the lens is from the wide-angle end to the telephoto end, the movement direction of the variable magnification group B moves towards the imaging target surface, and the movement direction of the compensation group E moves away from the imaging target surface.
6. The ultra high definition video zoom lens of claim 5, wherein: the moving range of the lens from the wide-angle end to the telephoto end zoom group B is 0.42-30.55 mm, namely the interval between the front fixed group A and the zoom group B is 0.42-30.55 mm; the moving range of the compensation group E is 11.48-2.65 mm, namely the interval between the middle fixed group D and the compensation group E is 0.42-30.55 mm.
7. The ultra-high-definition video zoom lens according to claim 1, wherein: the front fixed group A combined focal length satisfies: 53mm<f A <59mm；
The zoom group B combined focal length satisfies: -9.2mm<f B <-8.7mm；
The combined focal length of the middle fixed group D meets the following requirements: 40mm<f D <48mm；
The combined focal length of the intermediate compensation group E meets the following conditions: 35mm<f E <41mm。
8. The ultra-high-definition video zoom lens according to claim 1, wherein:
the air distance between the negative meniscus lens A-1 and the biconvex lens A-2 is 1.96mm;
the air distance between the biconvex lens A-2 and the positive meniscus lens A-3 is 0.13mm;
and:
the air distance between the negative meniscus lens B-1 and the biconcave lens B-2 is 5.40mm;
the air distance between the biconcave lens B-2 and the first gluing set is 0.13mm;
and:
the air distance between the second gluing set and the negative meniscus lens D-3 is 0.20mm;
and:
the air distance between the biconvex lens E-1 and the third glue combination is 0.13mm;
the air distance between the third bonding group and the biconvex lens E-4 is 0.45mm;
the air distance between the biconvex lens E-4 and the negative meniscus lens E-5 was 0.30mm.
9. The ultra high definition video zoom lens according to any one of claims 1 to 8, wherein: the negative meniscus lens B-1, the biconcave lens B-2 and the negative meniscus lens D-2 are all made of H-ZLAF89L; the material of the biconcave lens E-3 and the negative meniscus lens E-5 is H-ZLAF92.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211079302.3A CN115421285A (en) | 2022-09-05 | 2022-09-05 | Ultra-high-definition video zoom lens |
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| CN202211079302.3A CN115421285A (en) | 2022-09-05 | 2022-09-05 | Ultra-high-definition video zoom lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116626870A (en) * | 2023-07-26 | 2023-08-22 | 成都优视光电技术有限公司 | Super-high definition close-up zoom lens |
| CN117850009A (en) * | 2024-03-07 | 2024-04-09 | 成都优视光电技术有限公司 | Ultra-high definition micro-zoom lens |
-
2022
- 2022-09-05 CN CN202211079302.3A patent/CN115421285A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116626870A (en) * | 2023-07-26 | 2023-08-22 | 成都优视光电技术有限公司 | Super-high definition close-up zoom lens |
| CN116626870B (en) * | 2023-07-26 | 2023-09-26 | 成都优视光电技术有限公司 | Super-high definition close-up zoom lens |
| CN117850009A (en) * | 2024-03-07 | 2024-04-09 | 成都优视光电技术有限公司 | Ultra-high definition micro-zoom lens |
| CN117850009B (en) * | 2024-03-07 | 2024-05-03 | 成都优视光电技术有限公司 | Ultra-high definition micro-zoom lens |
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