CN114911035B - Low-dispersion high-definition lens - Google Patents

Low-dispersion high-definition lens Download PDF

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Publication number
CN114911035B
CN114911035B CN202210484165.5A CN202210484165A CN114911035B CN 114911035 B CN114911035 B CN 114911035B CN 202210484165 A CN202210484165 A CN 202210484165A CN 114911035 B CN114911035 B CN 114911035B
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lens
equal
optical system
less
relation
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CN114911035A (en
Inventor
薛政云
许熠宸
罗杰
戴敏林
江伟
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Fujian Forecam Tiantong Optics Co Ltd
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Fujian Forecam Tiantong Optics Co Ltd
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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
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The invention relates to a low-dispersion high-definition lens, wherein an optical system of the lens consists of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along the incidence direction of an optical axis; the first lens is a meniscus negative lens, the second lens is a meniscus negative lens, the third lens is a biconvex positive lens, and the fourth lens and the fifth lens are mutually adhered to form a cemented positive lens; the second lens and the sixth lens are aspheric lenses; a diaphragm is arranged between the second lens and the third lens, an optical filter is arranged at the image side of the sixth lens, the full view field of the lens is more than or equal to 98 degrees, the peripheral brightness is higher, and the effective view field is better than that of similar products; the imaging stability is high, and the imaging device can normally work in a temperature range of-40 ℃ to 105 ℃; two aspheric lenses are adopted, so that the imaging quality is higher, and chromatic aberration correction on a short wave band is good; the aperture is larger, so that the brightness and the imaging quality of the picture are further ensured; the optical system has low tolerance sensitivity and is suitable for large-scale high-yield production.

Description

Low-dispersion high-definition lens
Technical Field
The invention relates to a low-dispersion high-definition lens.
Background
Optical lenses have been developed in a variety of forms today as an important "antenna" for a motor vehicle to perceive the external environment. The vehicle-mounted front and rear view mirror has the highest requirement on imaging quality. In order to better adapt to the new generation of large target surface high frame rate shooting CMOS, each large lens manufacturer is pursuing an optical system with higher definition, wider visual field, higher picture brightness uniformity and suitability for large-scale mass production.
Disclosure of Invention
In view of the defects in the prior art, the technical problem to be solved by the invention is to provide a low-dispersion high-definition lens.
In order to solve the technical problems, the technical scheme of the invention is as follows: the optical system of the lens consists of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along the incidence direction of an optical axis; the first lens is a meniscus negative lens, the second lens is a meniscus negative lens, the third lens is a biconvex positive lens, and the fourth lens and the fifth lens are mutually adhered to form a cemented positive lens; the second lens and the sixth lens are aspheric lenses; a diaphragm is arranged between the second lens and the third lens, and an optical filter is arranged on the image side of the sixth lens;
the aspherical curve equation expression is:
wherein Z is the altitude of the aspheric surface from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant;、/>、/>、/>、/>、/>、/>、/>are all high order term coefficients.
Furthermore, the image side of the optical filter is provided with protective glass.
Further, the focal length of the optical system of the lens isThe focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively +.>、/>、/>、/>、/>、/>Wherein->、/>、/>And->The following proportions are satisfied: -2.5</>//><-1.5，-7.0</>//><-4.5，1.7</>//><2.7。
Further, the first lens satisfies the relation:≥1.5，/>less than or equal to 55.0; the second lens satisfies the relation: />≥1.5，/>Less than or equal to 50.0; the third lens satisfies the relation: />≥1.5，/>Less than or equal to 55.0; the fourth lens satisfies the relation: />≥1.5，/>Less than or equal to 50.0; the fifth lens satisfies the relation: />≥1.5，/>More than or equal to 50.0; the sixth lens satisfies the relation: />≥1.5，/>More than or equal to 40.0; wherein->Refractive index>Is an abbe constant.
Further, the total optical length TTL of the optical system of the lens and the focal length f of the optical system satisfy: TTL/f is less than or equal to 4.8.
Further, the F number of the optical system of the lens is less than or equal to 1.71.
Further, the half image height ImaH of the optical system of the lens and the focal length f of the optical system satisfy: imaH/f is more than or equal to 0.80 and less than or equal to 0.90.
An imaging method of a low-dispersion high-definition lens comprises the following steps: the incident light is imaged by the image plane after passing through the first lens, the second lens, the diaphragm, the third lens, the fourth lens, the fifth lens, the sixth lens and the optical filter in sequence.
Compared with the prior art, the invention has the following beneficial effects: the full view field is more than or equal to 98 degrees, the peripheral brightness is higher, and the effective view field is better than that of similar products; the imaging stability is high, and the imaging device can normally work in a temperature range of-40 ℃ to 105 ℃; the design of two aspheric lenses is adopted, so that the imaging quality is higher, and the chromatic aberration correction of a short wave band is good; the aperture is larger, so that the brightness and the imaging quality of the picture are further ensured; the optical system has low tolerance sensitivity and is suitable for large-scale high-yield production.
The invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic diagram of an optical structure of an embodiment.
Fig. 2 is an axial chromatic aberration diagram of an operating band of the first embodiment.
Fig. 3 is a vertical chromatic aberration diagram of an operating band of the first embodiment.
Fig. 4 is a distortion chart of the working wave Duan Changqu of the first embodiment.
Fig. 5 is a schematic view of the optical structure of the second embodiment.
Fig. 6 is an axial chromatic aberration diagram of the operating band of the second embodiment.
Fig. 7 is a vertical chromatic aberration diagram of an operating band of the second embodiment.
Fig. 8 is a distortion chart of the working wave Duan Changqu of the second embodiment.
Fig. 9 is a schematic view of the optical structure of the third embodiment.
Fig. 10 is an axial chromatic aberration diagram of an operating band of the third embodiment.
Fig. 11 is a vertical chromatic aberration diagram of an operating band of the third embodiment.
Fig. 12 is a distortion chart of the working wave Duan Changqu of the third embodiment.
L1-a first lens; l2-a second lens; l3-a third lens; l4-fourth lens; l5-fifth lens; l6-sixth lens; l7-optical filters; l8-protective glass; STOP-STOP; IMA-imaging plane.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1-12, an optical system of the lens is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along the incidence direction of an optical axis; the first lens is a meniscus negative lens, the second lens is a meniscus negative lens, the third lens is a biconvex positive lens, and the fourth lens and the fifth lens are mutually adhered to form a cemented positive lens; the second lens and the sixth lens are aspheric lenses; a diaphragm is arranged between the second lens and the third lens, an optical filter is arranged on the image side of the sixth lens, and protective glass is arranged on the image side of the optical filter;
the aspherical curve equation expression is:
wherein Z is the altitude of the aspheric surface from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant;、/>、/>、/>、/>、/>、/>、/>are all high order term coefficients.
In this embodiment, the focal length of the optical system of the lens isFirst, theThe focal lengths of the lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively +.>、/>、/>、/>、/>、/>Wherein->、/>、/>And->The following proportions are satisfied: -2.5</>//><-1.5，-7.0</>//><-4.5，1.7</>//><2.7。
In the present embodiment, the first lens satisfies the relation:≥1.5，/>less than or equal to 55.0; the second lens satisfies the relation:≥1.5，/>less than or equal to 50.0; the third lens satisfies the relation: />≥1.5，/>Less than or equal to 55.0; the fourth lens satisfies the relation:≥1.5，/>less than or equal to 50.0; the fifth lens satisfies the relation: />≥1.5，/>≥50.0；The sixth lens satisfies the relation:≥1.5，/>more than or equal to 40.0; wherein->Refractive index>Is an abbe constant.
In this embodiment, the total optical length TTL of the optical system of the lens and the focal length f of the optical system satisfy: TTL/f is less than or equal to 4.8.
In this embodiment, the F-number of the optical system of the lens is equal to or less than 1.71.
In this embodiment, the half image height ImaH of the optical system of the lens and the focal length f of the optical system satisfy: imaH/f is more than or equal to 0.80 and less than or equal to 0.90.
An imaging method of a low-dispersion high-definition lens comprises the following steps: the incident light is imaged by the image plane after passing through the first lens, the second lens, the diaphragm, the third lens, the fourth lens, the fifth lens, the sixth lens and the optical filter in sequence.
The full view field of the lens is more than or equal to 98 degrees, the peripheral brightness is higher, and the effective view field is better than that of similar products; the full glass structure design is adopted, the imaging stability is high, and the imaging device can normally work in the temperature range of-40 ℃ to 105 ℃; the design of two aspheric lenses is adopted, the imaging quality is higher, the glass materials are reasonably matched, and the chromatic aberration correction of the short wave band is good; the aperture is larger, so that the brightness and the imaging quality of the picture are further ensured; the surface type and the structural design are reasonable, the tolerance sensitivity of the whole optical system is low, and the optical system is suitable for large-scale high-yield production.
The specific parameters of each lens are as follows:
embodiment one:
the technical indexes of the optical system implementation of the embodiment are as follows:
(1) Focal length: EFFL is less than or equal to 3.95mm and less than or equal to 4.55mm; (2) aperture F is less than or equal to 1.60; (3) operating band: visible light.
In order to achieve the above design parameters, the specific designs adopted by the optical system of this embodiment are shown in the following table:
the aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
embodiment two:
the technical indexes of the optical system implementation of the embodiment are as follows:
(1) Focal length: EFFL is less than or equal to 3.95mm and less than or equal to 4.55mm; (2) aperture F is less than or equal to 1.67; (3) operating band: visible light.
In order to achieve the above design parameters, the specific designs adopted by the optical system of this embodiment are shown in the following table:
the aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
embodiment III:
the technical indexes of the optical system implementation of the embodiment are as follows:
(1) Focal length: EFFL is less than or equal to 3.95mm and less than or equal to 4.55mm; (2) aperture F is less than or equal to 1.71; (3) operating band: visible light.
In order to achieve the above design parameters, the specific designs adopted by the optical system of this embodiment are shown in the following table:
the aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
while the foregoing is directed to the preferred embodiment, other and further embodiments of the invention will be apparent to those skilled in the art from the following description, wherein the invention is described, by way of illustration and example only, and it is intended that the invention not be limited to the specific embodiments illustrated and described, but that the invention is to be limited to the specific embodiments illustrated and described.

Claims (2)

1. A low-dispersion high-definition lens is characterized in that: the optical system of the lens consists of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along the incidence direction of an optical axis; the first lens is a meniscus negative lens, the second lens is a meniscus negative lens, the third lens is a biconvex positive lens, and the fourth lens and the fifth lens are mutually adhered to form a cemented positive lens; the second lens is an aspheric lens, and the sixth lens is an aspheric positive lens; a diaphragm is arranged between the second lens and the third lens, and an optical filter is arranged on the image side of the sixth lens;
the aspherical curve equation expression is:
；
wherein Z is the altitude of the aspheric surface from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant;are all higher order item systemsA number; the image side of the optical filter is provided with protective glass; the focal length of the optical system of the lens is f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively f 1 、 f 2 、f 3 、f 4 、f 5 、f 6 Wherein the following ratio is satisfied: -2.5<f 1 /f<-1.5，-7.0<f 2 /f<-4.5，1.7<f 3 /f<2.7; the first lens satisfies the relation: n (N) d ≥1.5， V d Less than or equal to 55.0; the second lens satisfies the relation: n (N) d ≥1.5，V d Less than or equal to 50.0; the third lens satisfies the relation: n (N) d ≥1.5，V d Less than or equal to 55.0; the fourth lens satisfies the relation: n (N) d ≥1.5，V d Less than or equal to 50.0; the fifth lens satisfies the relation: n (N) d ≥1.5，V d More than or equal to 50.0; the sixth lens satisfies the relation: n (N) d ≥1.5，V d More than or equal to 40.0; wherein, the refractive index is Abbe constant; the total optical length TTL of the optical system of the lens and the focal length f of the optical system satisfy the following conditions: TTL/f is less than or equal to 4.8; the F number of an optical system of the lens is less than or equal to 1.71; the half image height ImaH of the optical system of the lens and the focal length f of the optical system satisfy: imaH/f is more than or equal to 0.80 and less than or equal to 0.90.
2. An imaging method of a low-dispersion high-definition lens, which adopts the low-dispersion high-definition lens as claimed in claim 1, and is characterized in that: the incident light is imaged by the image plane after passing through the first lens, the second lens, the diaphragm, the third lens, the fourth lens, the fifth lens, the sixth lens and the optical filter in sequence.
CN202210484165.5A 2022-05-06 2022-05-06 Low-dispersion high-definition lens Active CN114911035B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005062694A (en) * 2003-08-19 2005-03-10 Matsushita Electric Ind Co Ltd Waterproof camera
JP2008203870A (en) * 2001-04-04 2008-09-04 Olympus Corp Electronic imaging device
CN101614864A (en) * 2009-06-09 2009-12-30 宁波舜宇车载光学技术有限公司 Super wide angle mega pixel vehicle-mounted lens
CN102289052A (en) * 2011-08-22 2011-12-21 宁波舜宇车载光学技术有限公司 Ultra wide angle camera lens
CN103576290A (en) * 2013-10-30 2014-02-12 宁波舜宇车载光学技术有限公司 Wide-angle lens
CN103852870A (en) * 2014-02-21 2014-06-11 襄阳锦翔光电科技股份有限公司 Optical lens assembly
JP2017228832A (en) * 2016-06-20 2017-12-28 パナソニックＩｐマネジメント株式会社 Imaging apparatus
CN107577032A (en) * 2017-09-19 2018-01-12 舜宇光学(中山)有限公司 Low distortion wide-angle lens

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008203870A (en) * 2001-04-04 2008-09-04 Olympus Corp Electronic imaging device
JP2005062694A (en) * 2003-08-19 2005-03-10 Matsushita Electric Ind Co Ltd Waterproof camera
CN101614864A (en) * 2009-06-09 2009-12-30 宁波舜宇车载光学技术有限公司 Super wide angle mega pixel vehicle-mounted lens
CN102289052A (en) * 2011-08-22 2011-12-21 宁波舜宇车载光学技术有限公司 Ultra wide angle camera lens
CN103576290A (en) * 2013-10-30 2014-02-12 宁波舜宇车载光学技术有限公司 Wide-angle lens
CN103852870A (en) * 2014-02-21 2014-06-11 襄阳锦翔光电科技股份有限公司 Optical lens assembly
JP2017228832A (en) * 2016-06-20 2017-12-28 パナソニックＩｐマネジメント株式会社 Imaging apparatus
CN107577032A (en) * 2017-09-19 2018-01-12 舜宇光学(中山)有限公司 Low distortion wide-angle lens

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