CN114942511A - Large-view-range and large-imaging-area optical lens and imaging method thereof - Google Patents

Large-view-range and large-imaging-area optical lens and imaging method thereof Download PDF

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Publication number
CN114942511A
CN114942511A CN202210477871.7A CN202210477871A CN114942511A CN 114942511 A CN114942511 A CN 114942511A CN 202210477871 A CN202210477871 A CN 202210477871A CN 114942511 A CN114942511 A CN 114942511A
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lens
optical
optical system
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equal
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CN114942511B (en
Inventor
罗杰
许熠宸
薛政云
戴敏林
胡青平
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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
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

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

The invention relates to an optical lens with a large viewing range and a large imaging area.A light system consists of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a negative meniscus lens, and the second lens, the third lens and the sixth lens are aspheric lenses. Compared with an all-plastic or glass-plastic mixed structure, the lens improves imaging stability and imaging quality.

Description

Large-view-finding-range and large-imaging-area optical lens and imaging method thereof
Technical Field
The invention relates to an optical lens with a large viewing range and a large imaging area and an imaging method thereof.
Background
The vehicle-mounted lens has become the standard configuration of various motor vehicles at present, and plays an important role in the aspects of improving the driving experience, protecting the life and property safety of traffic participants and the like. However, the problems of large detection blind area, low lens definition, low peripheral brightness, and the like are common problems faced by related similar products, and a vehicle-mounted lens with high imaging quality, large imaging range, and high stability is urgently needed in the current market to improve the performance of driving assistance products.
Disclosure of Invention
The invention aims to provide an optical lens with a large viewing range and a large imaging area and an imaging method thereof.
The technical scheme of the invention is as follows: an optical lens with a large viewing range and a large imaging area is characterized in that an optical system consists of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident path; the first lens is a meniscus negative lens, and the third lens is a double convex positive lens; the second lens, the third lens and the sixth lens are aspheric lenses.
Further, the focal length of the optical system is
Figure 100002_DEST_PATH_IMAGE001
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
Figure 628006DEST_PATH_IMAGE002
、
Figure 100002_DEST_PATH_IMAGE003
、
Figure 564738DEST_PATH_IMAGE004
、
Figure 100002_DEST_PATH_IMAGE005
，
Figure 640361DEST_PATH_IMAGE006
、
Figure 100002_DEST_PATH_IMAGE007
Wherein
Figure 244518DEST_PATH_IMAGE002
、
Figure 133845DEST_PATH_IMAGE004
、
Figure 636502DEST_PATH_IMAGE006
And
Figure 3898DEST_PATH_IMAGE001
the following proportions are satisfied: -4.5<
Figure 58966DEST_PATH_IMAGE002
/
Figure 869927DEST_PATH_IMAGE001
<-0.1，0.1<
Figure 640306DEST_PATH_IMAGE004
/
Figure 296546DEST_PATH_IMAGE001
<3.5，-3.0<
Figure 468771DEST_PATH_IMAGE006
/
Figure 699901DEST_PATH_IMAGE001
<2.0。
Further, the first lens satisfies the relation:
Figure 442729DEST_PATH_IMAGE008
≥1.5，
Figure 100002_DEST_PATH_IMAGE009
not less than 40.0; second lensSatisfy the relation:
Figure 93807DEST_PATH_IMAGE008
≥1.5，
Figure 871270DEST_PATH_IMAGE009
less than or equal to 60.0; the third lens satisfies the relation:
Figure 555192DEST_PATH_IMAGE008
≥1.5，
Figure 34584DEST_PATH_IMAGE009
less than or equal to 55.0; the sixth lens satisfies the relation:
Figure 813053DEST_PATH_IMAGE008
≥1.5，
Figure 445023DEST_PATH_IMAGE009
not less than 50.0; wherein
Figure 286464DEST_PATH_IMAGE008
In order to be the refractive index,
Figure 3885DEST_PATH_IMAGE009
abbe constant.
Further, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 8.0.
Further, the F number of the optical system is less than or equal to 1.6.
Further, the half image height ImaH of the optical system and the focal length f of the optical system satisfy: ImaH/f is less than or equal to 1.26.
An imaging method of an optical lens with a large viewing range and a large imaging area comprises the following steps: the light rays sequentially pass through the first lens, the second lens, the third lens, the diaphragm, the fourth lens, the fifth lens and the sixth lens from left to right and then are imaged.
Compared with the prior art, the invention has the following advantages:
1. this camera lens adopts full glass structure, compares in plastic or glass and moulds mixed structure and has promoted imaging stability.
2. The optical processing process capability is fully utilized, the imaging quality is improved by adopting a plurality of aspheric surfaces, and the system structure is simplified.
3. F number is less, and clear aperture is bigger, has guaranteed the sufficiency of system's light inlet quantity, can adapt to multiple light environment better.
4. Through reasonable material collocation and lens optical power distribution, the axial chromatic aberration and the transverse chromatic aberration of the whole optical system are well corrected, and the high-grade aberration of the whole optical system is effectively corrected through reasonable surface design.
5. Meanwhile, the light incidence angle of each mirror surface is small, and the tolerance sensitivity is low.
Drawings
FIG. 1 is a schematic diagram of an optical structure according to a first embodiment of the present invention;
FIG. 2 is a diagram of axial chromatic aberration of operating band according to a first embodiment of the present invention;
FIG. 3 is a vertical axis chromatic aberration diagram of the working wavelength band according to the first embodiment of the present invention;
FIG. 4 is a field curvature distortion diagram of the working band according to the first embodiment of the present invention;
FIG. 5 is a schematic view of an optical structure according to a second embodiment of the present invention;
FIG. 6 is a diagram of axial chromatic aberration of operating band according to the second embodiment of the present invention;
FIG. 7 is a vertical axis chromatic aberration diagram of the operating band of the second embodiment of the present invention;
FIG. 8 is a field curvature distortion diagram of the working band according to the second embodiment of the present invention;
FIG. 9 is a schematic diagram of an optical structure according to a third embodiment of the present invention;
FIG. 10 is a diagram of axial chromatic aberration of the operating band of the third embodiment of the present invention;
FIG. 11 is a vertical axis chromatic aberration diagram of the operating band in accordance with the third embodiment of the present invention;
FIG. 12 is a field curvature distortion diagram of the operating band of the third embodiment of the present invention;
FIG. 13 is a schematic diagram of an optical structure of a fourth embodiment of the present invention;
FIG. 14 is a graph of axial chromatic aberration of the operating band of the fourth embodiment of the present invention;
FIG. 15 is a vertical axis chromatic aberration diagram of the operating band of the fourth embodiment of the present invention;
FIG. 16 is a field curvature distortion diagram of the operating band of the fourth embodiment of the present invention;
in the figure: l1-first lens; l2-second lens; l3-third lens; STO-stop; l4-fourth lens; l5-fifth lens; l6-sixth lens; l7-equivalent glass plate; IMA-imaging plane.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Embodiment one refer to fig. 1 to 4
An optical lens with a large viewing range and a large imaging area comprises an optical system and a control system, wherein the optical system consists of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along a light incident path from left to right; the first lens is a meniscus negative lens, and the third lens is a double convex positive lens; the second lens, the third lens and the sixth lens are aspheric lenses.
In this embodiment, the fourth lens is a biconvex positive lens.
In this embodiment, the focal length of the optical system is
Figure 586045DEST_PATH_IMAGE001
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
Figure 72521DEST_PATH_IMAGE002
、
Figure 81934DEST_PATH_IMAGE003
、
Figure 286650DEST_PATH_IMAGE004
、
Figure 672501DEST_PATH_IMAGE005
，
Figure 13484DEST_PATH_IMAGE006
、
Figure 925289DEST_PATH_IMAGE007
Wherein
Figure 866569DEST_PATH_IMAGE002
、
Figure 10106DEST_PATH_IMAGE004
、
Figure 454863DEST_PATH_IMAGE006
And
Figure 947024DEST_PATH_IMAGE001
the following proportions are satisfied: -4.5<
Figure 316213DEST_PATH_IMAGE002
/
Figure 778287DEST_PATH_IMAGE001
<-0.1，0.1<
Figure 625020DEST_PATH_IMAGE004
/
Figure 147137DEST_PATH_IMAGE001
<3.5，-3.0<
Figure 813742DEST_PATH_IMAGE006
/
Figure 79507DEST_PATH_IMAGE001
<2.0。
In this embodiment, the first lens satisfies the relation:
Figure 249588DEST_PATH_IMAGE008
≥1.5，
Figure 674098DEST_PATH_IMAGE009
not less than 40.0; the second lens satisfies the relation:
Figure 280529DEST_PATH_IMAGE008
≥1.5，
Figure 818826DEST_PATH_IMAGE009
less than or equal to 60.0; the third lens satisfies the relation:
Figure 577835DEST_PATH_IMAGE008
≥1.5，
Figure 441754DEST_PATH_IMAGE009
less than or equal to 55.0; the sixth lens satisfies the relation:
Figure 803990DEST_PATH_IMAGE008
≥1.5，
Figure 162290DEST_PATH_IMAGE009
not less than 50.0; wherein
Figure 821811DEST_PATH_IMAGE008
In order to be the refractive index,
Figure 607364DEST_PATH_IMAGE009
abbe constant.
In this embodiment, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 8.0.
In this embodiment, the F number of the optical system is less than or equal to 1.6.
In this embodiment, the half-image height ImaH of the optical system and the focal length f of the optical system satisfy: ImaH/f is less than or equal to 1.26.
In this embodiment, the expression of the aspheric surface curve equation is:
Figure 453966DEST_PATH_IMAGE010
wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant;
Figure DEST_PATH_IMAGE011
are all high-order term coefficients.
In this embodiment, the technical indexes realized by the optical system are as follows:
(1) focal length: EFFL is more than or equal to 2.74mm and less than or equal to 4.32 mm; (2) the aperture F is less than or equal to 1.6.
To realize the above design parameters, the specific design adopted by the optical system of this embodiment is as follows:
Figure 802908DEST_PATH_IMAGE012
。
the aspherical surface coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
Figure DEST_PATH_IMAGE013
。
embodiment II referring to FIGS. 5 to 8
In this embodiment, the fourth lens is a negative meniscus lens. The fourth lens and the fifth lens form a gluing set.
In this embodiment, the technical indexes realized by the optical system are as follows:
(1) focal length: EFFL is more than or equal to 2.79mm and less than or equal to 4.35 mm; (2) the aperture F is less than or equal to 1.6.
To realize the above design parameters, the specific design adopted by the optical system of this embodiment is as follows:
Figure 986109DEST_PATH_IMAGE014
。
the aspherical coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
Figure DEST_PATH_IMAGE015
。
embodiment III reference is made to FIGS. 9 to 12
In this embodiment, the fourth lens is a negative meniscus lens. The fourth lens and the fifth lens form a gluing set.
In this embodiment, the technical indexes realized by the optical system are as follows:
(1) focal length: EFFL is more than or equal to 2.85mm and less than or equal to 4.71 mm; (2) the aperture F is less than or equal to 1.6.
In order to realize the above design parameters, the specific design adopted by the optical system of this embodiment is as follows:
Figure 863935DEST_PATH_IMAGE016
。
the aspherical surface coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
Figure DEST_PATH_IMAGE017
。
example IV reference to FIGS. 13 to 16
In this embodiment, the fourth lens is a negative meniscus lens. The fourth lens and the fifth lens form a gluing set.
In this embodiment, the technical indexes realized by the optical system are as follows:
(1) focal length: EFFL is more than or equal to 2.81mm and less than or equal to 4.76 mm; (2) the aperture F is less than or equal to 1.6.
To realize the above design parameters, the specific design adopted by the optical system of this embodiment is as follows:
Figure 981189DEST_PATH_IMAGE018
。
the aspherical coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
Figure 884554DEST_PATH_IMAGE019
。
the imaging method of the large-view-range and large-imaging-area optical lens comprises the following steps of: the light rays sequentially pass through the first lens, the second lens, the third lens, the diaphragm, the fourth lens, the fifth lens and the sixth lens from left to right and then are imaged.
It will be apparent to those skilled in the art that various modifications, alterations, substitutions and variations can be made in the above embodiments without departing from the spirit and scope of the invention.

Claims (7)

1. An optical lens with a large viewing range and a large imaging area is characterized in that an optical system consists of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a negative meniscus lens, and the second lens, the third lens and the sixth lens are aspheric lenses.
2. The large viewing range and large imaging area optical lens assembly of claim 1, wherein the focal length of the optical system is
Figure DEST_PATH_IMAGE001
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
Figure 579577DEST_PATH_IMAGE002
、
Figure DEST_PATH_IMAGE003
、
Figure 783025DEST_PATH_IMAGE004
、
Figure DEST_PATH_IMAGE005
，
Figure 405636DEST_PATH_IMAGE006
、
Figure DEST_PATH_IMAGE007
In which
Figure 98655DEST_PATH_IMAGE002
、
Figure 986976DEST_PATH_IMAGE004
、
Figure 59362DEST_PATH_IMAGE006
And
Figure 83950DEST_PATH_IMAGE001
the following proportions are satisfied: -4.5<
Figure 213449DEST_PATH_IMAGE002
/
Figure 589066DEST_PATH_IMAGE001
<-0.1，0.1<
Figure 665476DEST_PATH_IMAGE004
/
Figure 872466DEST_PATH_IMAGE001
<3.5，-3.0<
Figure 172866DEST_PATH_IMAGE006
/
Figure 770201DEST_PATH_IMAGE001
<2.0。
3. The optical lens assembly with large viewing range and large imaging area as claimed in claim 1 or 2, wherein the first lens element satisfies the following relation:
Figure 178530DEST_PATH_IMAGE008
≥1.5，
Figure DEST_PATH_IMAGE009
not less than 40.0; the second lens satisfies the relation:
Figure 161398DEST_PATH_IMAGE008
≥1.5，
Figure 383432DEST_PATH_IMAGE009
less than or equal to 60.0; the third lens satisfies the relation:
Figure 717330DEST_PATH_IMAGE008
≥1.5，
Figure 683012DEST_PATH_IMAGE009
less than or equal to 55.0; the sixth lens satisfies the relation:
Figure 458070DEST_PATH_IMAGE008
≥1.5，
Figure 837623DEST_PATH_IMAGE009
not less than 50.0; wherein
Figure 675129DEST_PATH_IMAGE008
Is a refractive index of the light beam,
Figure 224928DEST_PATH_IMAGE009
abbe constant.
4. The optical lens assembly as claimed in claim 1, wherein the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 8.0.
5. The optical lens with large viewing range and large imaging area as claimed in claim 1, wherein the F-number of the optical system is less than or equal to 1.6.
6. The optical lens with large viewing range and large imaging area as claimed in claim 1, 2, 4, 5 or 6, wherein the half image height ImaH of the optical system and the focal length f of the optical system satisfy: ImaH/f is less than or equal to 1.26.
7. An imaging method of the large viewing range and large imaging area optical lens according to any one of claims 1 to 5, characterized by the following steps: the light rays sequentially pass through the first lens, the second lens, the third lens, the diaphragm, the fourth lens, the fifth lens and the sixth lens from left to right to form an image.
CN202210477871.7A 2022-05-05 Large-view-range large-imaging-area optical lens and imaging method thereof Active CN114942511B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002072085A (en) * 2000-09-01 2002-03-12 Matsushita Electric Ind Co Ltd Super-wide-angle lens
CN110333591A (en) * 2019-07-23 2019-10-15 福建福光天瞳光学有限公司 A kind of 0.95mm vehicle-mounted high-definition looks around optical system and its imaging method
CN110568590A (en) * 2019-09-25 2019-12-13 福建福光天瞳光学有限公司 Starlight-level optical lens and imaging method thereof
CN110727088A (en) * 2019-10-17 2020-01-24 福建福光股份有限公司 Wide-angle high-low temperature-resistant fixed-focus lens and working method thereof
CN112285884A (en) * 2020-10-28 2021-01-29 福建福光天瞳光学有限公司 1.14mm ultra-wide angle optical system and imaging method thereof
CN217718235U (en) * 2022-05-05 2022-11-01 福建福光天瞳光学有限公司 Large-view-range and large-imaging-area optical system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002072085A (en) * 2000-09-01 2002-03-12 Matsushita Electric Ind Co Ltd Super-wide-angle lens
CN110333591A (en) * 2019-07-23 2019-10-15 福建福光天瞳光学有限公司 A kind of 0.95mm vehicle-mounted high-definition looks around optical system and its imaging method
CN110568590A (en) * 2019-09-25 2019-12-13 福建福光天瞳光学有限公司 Starlight-level optical lens and imaging method thereof
CN110727088A (en) * 2019-10-17 2020-01-24 福建福光股份有限公司 Wide-angle high-low temperature-resistant fixed-focus lens and working method thereof
CN112285884A (en) * 2020-10-28 2021-01-29 福建福光天瞳光学有限公司 1.14mm ultra-wide angle optical system and imaging method thereof
CN217718235U (en) * 2022-05-05 2022-11-01 福建福光天瞳光学有限公司 Large-view-range and large-imaging-area optical system

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