CN114942511B - Large-view-range large-imaging-area optical lens and imaging method thereof - Google Patents
Large-view-range large-imaging-area optical lens and imaging method thereof Download PDFInfo
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- CN114942511B CN114942511B CN202210477871.7A CN202210477871A CN114942511B CN 114942511 B CN114942511 B CN 114942511B CN 202210477871 A CN202210477871 A CN 202210477871A CN 114942511 B CN114942511 B CN 114942511B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 59
- 238000003384 imaging method Methods 0.000 title claims abstract description 20
- 230000005499 meniscus Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 125000005647 linker group Chemical group 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction 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
- G02B13/002—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
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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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Abstract
The invention relates to a large-view-range large-imaging-area optical lens, wherein 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. Compared with a full plastic or glass plastic mixed structure, the lens improves imaging stability and imaging quality.
Description
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 becomes the standard of various motor vehicles at present, and plays an important role in improving driving experience, protecting life and property safety of traffic participants and the like. However, the large detection blind area, low lens definition, low peripheral brightness, etc. are common problems faced by related similar products, and there is a need in the current market for a vehicle-mounted lens with high imaging quality, large imaging range and high stability to improve the performance of driving assistance products.
Disclosure of Invention
The invention aims to provide an optical lens with a large view-finding range and a large imaging area and an imaging method thereof, and compared with a full-plastic or glass-plastic mixed structure, the lens has the advantage that the imaging stability and the imaging quality are improved.
The technical scheme of the invention is as follows: 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 from left to right along a light incident light path; wherein the first lens is a meniscus negative lens, and the third lens is a biconvex positive lens; the second lens, the third lens and the sixth lens are aspheric lenses.
Further, the focal length of the optical system 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: -4.5//><-0.1，0.1</>//><3.5，-3.0</>//><2.0。
Further, the first lens satisfies the relation:≥1.5，/> More than or equal to 40.0; the second lens satisfies the relation: /(I) ≥1.5，/>Less than or equal to 60.0; the third lens satisfies the relation: /(I)≥1.5，/>Less than or equal to 55.0; the sixth lens satisfies the relation: /(I)≥1.5，/>More than or equal to 50.0; wherein/>Refractive index,/>Is an 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. The lens adopts a full glass structure, and compared with a full plastic or glass-plastic mixed structure, the imaging stability is improved.
2. Fully utilizes the optical processing process capability, adopts a plurality of aspheric surfaces to improve the imaging quality and simplifies the system structure.
3. The F number is smaller, the clear aperture is larger, the sufficient light quantity of the system is ensured, and the system can be better suitable for various light environments.
4. Through reasonable material collocation and lens focal power distribution, the axial chromatic aberration and the transverse chromatic aberration of the whole optical system are well corrected, and the reasonable surface design also enables the advanced aberration of the whole optical system to be effectively corrected.
5. Meanwhile, the incidence angle of the light rays of each mirror surface is small, and the tolerance sensitivity is low.
Drawings
FIG. 1 is a schematic view of an optical structure of a first embodiment of the present invention;
FIG. 2 is an axial chromatic aberration diagram of an operating band according to a first embodiment of the present invention;
FIG. 3 is a vertical axis color difference chart of an operating band according to a first embodiment of the present invention;
FIG. 4 is a graph of the distortion of the working wave Duan Changqu according to one embodiment of the present invention;
FIG. 5 is a schematic view of an optical structure of a second embodiment of the present invention;
FIG. 6 is an axial chromatic aberration diagram of an operating band for a second embodiment of the present invention;
FIG. 7 is a vertical axis color difference chart of an operating band according to a second embodiment of the present invention;
FIG. 8 is a graph of the distortion of the working wave Duan Changqu according to the second embodiment of the present invention;
FIG. 9 is a schematic view of an optical structure of a third embodiment of the present invention;
FIG. 10 is an axial chromatic aberration diagram of an operating band for a third embodiment of the invention;
FIG. 11 is a vertical axis color difference plot of the operating band for a third embodiment of the present invention;
FIG. 12 is a graph of the distortion of the working wave Duan Changqu according to the third embodiment of the present invention;
FIG. 13 is a schematic view showing an optical structure of a fourth embodiment of the present invention;
FIG. 14 is an axial chromatic aberration diagram of the operating band for embodiment four of the present invention;
FIG. 15 is a vertical axis color difference plot of the operating band for a fourth embodiment of the present invention;
FIG. 16 is a graph of the distortion of the working wave Duan Changqu according to example four of the present invention;
In the figure: l1-a first lens; l2-a second lens; l3-a third lens; STO-diaphragm; l4-fourth lens; l5-fifth lens; l6-sixth lens; l7-equivalent glass plate; 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, but the present invention is not limited thereto.
Embodiment-referring to FIGS. 1 to 4
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 from left to right along a light incident light path; wherein the first lens is a meniscus negative lens, and the third lens is a biconvex 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 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: -4.5//><-0.1，0.1</>//><3.5，-3.0</>//><2.0。
In this embodiment, the first lens satisfies the relationship:≥1.5，/> more than or equal to 40.0; the second lens satisfies the relation: ≥1.5，/> Less than or equal to 60.0; the third lens satisfies the relation: /(I) ≥1.5，/>Less than or equal to 55.0; the sixth lens satisfies the relation:≥1.5，/> More than or equal to 50.0; wherein/> Refractive index,/>Is an 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 1.6 or less.
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 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 technical indexes of the implementation of the optical system are as follows:
(1) Focal length: EFFL mm or less and 4.32mm or less are 2.74mm or less; (2) aperture F is less than or equal to 1.6.
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:
。
example two refer to FIGS. 5-8
In this embodiment, the fourth lens is a meniscus negative lens. The fourth lens and the fifth lens form a bonding group.
In this embodiment, the technical indexes of the implementation of the optical system are as follows:
(1) Focal length: EFFL mm or more and 4.35mm or less are not less than 2.79 mm; (2) aperture F is less than or equal to 1.6.
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 referring to FIGS. 9 to 12
In this embodiment, the fourth lens is a meniscus negative lens. The fourth lens and the fifth lens form a bonding group.
In this embodiment, the technical indexes of the implementation of the optical system are as follows:
(1) Focal length: EFFL mm or more and 4.71mm or less; (2) aperture F is less than or equal to 1.6.
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:
。
Example IV referring to FIGS. 13 to 16
In this embodiment, the fourth lens is a meniscus negative lens. The fourth lens and the fifth lens form a bonding group.
In this embodiment, the technical indexes of the implementation of the optical system are as follows:
(1) Focal length: EFFL mm or more and 4.76mm or less are not less than 2.81 mm; (2) aperture F is less than or equal to 1.6.
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:
。
The imaging method of the large-view-range large-imaging-area optical lens 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.
The foregoing is only illustrative of the present invention, and it will be appreciated by those skilled in the art that, based on the teachings herein, no inventive effort is required to devise various arrangements of large-field optical lenses and large-imaging-area optical lenses without departing from the spirit and scope of the invention, and that, therefore, equivalent changes, modifications, substitutions and alterations herein can be made without departing from the spirit and scope of the invention.
Claims (6)
1. 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 from left to right along a light incident light path; the first lens is a meniscus negative lens, and the second lens, the third lens and the sixth lens are aspheric lenses; the focal length of the optical system 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: -4.5//><-0.1，0.1</>//><3.5，-3.0</>//><2.0；
The curvature radius of the object side surface of the first lens is 15.547mm, the curvature radius of the image side surface is 5.872mm, and the thickness of the first lens is 0.934mm; the curvature radius of the object side surface of the second lens is 16.659mm, the curvature radius of the image side surface is 4.397mm, and the thickness of the second lens is 0.743mm; the curvature radius of the object side surface of the third lens is 14.159mm, the curvature radius of the image side surface is-7.57 mm, and the thickness is 3.0mm; the curvature radius of the object side surface of the fourth lens is 12.204mm, the curvature radius of the image side surface is-84.678 mm, and the thickness is 2.398mm; the curvature radius of the object side surface of the fifth lens is-85.625 mm, the curvature radius of the image side surface is 8.383mm, and the thickness is 0.734mm; the object side surface curvature radius of the sixth lens is 6.006mm, the image side surface curvature radius is-139.354 mm, and the thickness is 1.749mm; the air interval between the first lens and the second lens is 2.959mm, the air interval between the second lens and the third lens is 6.184mm, the air interval between the third lens and the fourth lens is 2.515mm, the air interval between the fourth lens and the fifth lens is 0.085mm, and the air interval between the fifth lens and the sixth lens is 0.442mm;
Or the object side surface curvature radius of the first lens is 18.150mm, the image side surface curvature radius is 4.302mm, and the thickness is 1.310mm; the curvature radius of the object side surface of the second lens is-7.022 mm, the curvature radius of the image side surface is-14.557 mm, and the thickness is 5.500mm; the curvature radius of the object side surface of the third lens is 7.046mm, the curvature radius of the image side surface is-51.657 mm, and the thickness of the third lens is 2.702mm; the curvature radius of the object side surface of the fourth lens is 11.457mm, the curvature radius of the image side surface is 4.827mm, and the thickness is 1.656mm; the curvature radius of the object side surface of the fifth lens is 4.827mm, the curvature radius of the image side surface is-7.042 mm, and the thickness is 4.750mm; the object side surface curvature radius of the sixth lens is 7.367mm, the image side surface curvature radius is 6.147mm, and the thickness is 1.200mm; the air interval between the first lens and the second lens is 3.896mm, the air interval between the second lens and the third lens is 0.165mm, the air interval between the third lens and the fourth lens is 2.767mm, the air interval between the fourth lens and the fifth lens is 0mm, and the air interval between the fifth lens and the sixth lens is 0.1mm;
Or the object side surface curvature radius of the first lens is 15.653mm, the image side surface curvature radius is 4.185mm, and the thickness is 1.310mm; the curvature radius of the object side surface of the second lens is-6.450 mm, the curvature radius of the image side surface is-11.594 mm, and the thickness is 5.671mm; the curvature radius of the object side surface of the third lens is 6.940mm, the curvature radius of the image side surface is-169.001 mm, and the thickness of the third lens is 2.908mm; the curvature radius of the object side surface of the fourth lens is 12.610mm, the curvature radius of the image side surface is 4.814mm, and the thickness of the fourth lens is 1.770mm; the curvature radius of the object side surface of the fifth lens is 4.814mm, the curvature radius of the image side surface is-9.848 mm, and the thickness of the fifth lens is 4.780mm; the object side surface curvature radius of the sixth lens is 7.271mm, the image side surface curvature radius is 8.639mm, and the thickness is 1.255mm; the air interval between the first lens and the second lens is 3.926mm, the air interval between the second lens and the third lens is 0.125mm, the air interval between the third lens and the fourth lens is 2.205mm, the air interval between the fourth lens and the fifth lens is 0mm, and the air interval between the fifth lens and the sixth lens is 0.1mm;
Or the object side surface curvature radius of the first lens is 22.905mm, the image side surface curvature radius is 4.503mm, and the thickness is 1.310mm; the curvature radius of the object side surface of the second lens is-7.928 mm, the curvature radius of the image side surface is-9.669 mm, and the thickness is 6.0mm; the curvature radius of the object side surface of the third lens is 11.165mm, the curvature radius of the image side surface is-15.983 mm, and the thickness of the third lens is 2.719mm; the curvature radius of the object side surface of the fourth lens is 26.591mm, the curvature radius of the image side surface is 6.011mm, and the thickness is 1.224mm; the curvature radius of the object side surface of the fifth lens is 6.011mm, the curvature radius of the image side surface is-10.313 mm, and the thickness is 4.644mm; the object side surface curvature radius of the sixth lens is 8.809mm, the image side surface curvature radius is 9.158mm, and the thickness is 1.285mm; the air space between the first lens and the second lens is 4.089mm, the air space between the second lens and the third lens is 0.165mm, the air space between the third lens and the fourth lens is 2.292mm, the air space between the fourth lens and the fifth lens is 0mm, and the air space between the fifth lens and the sixth lens is 0.388mm.
2. The large viewing area large imaging area optical lens of claim 1, wherein the first lens satisfies the relationship:≥1.5，/> More than or equal to 40.0; the second lens satisfies the relation: /(I) ≥1.5，/>Less than or equal to 60.0; the third lens satisfies the relation: /(I)≥1.5，/>Less than or equal to 55.0; the sixth lens satisfies the relation: /(I)≥1.5，/>More than or equal to 50.0; wherein/>Refractive index,/>Is an abbe constant.
3. The large-viewing-range large-imaging-area optical lens according to claim 1, wherein between an optical total length TTL of the optical system and a focal length f of the optical system, there is satisfied: TTL/f is less than or equal to 8.0.
4. The large-viewing-range large-imaging-area optical lens of claim 1, wherein the F-number of the optical system is 1.6 or less.
5. The large-viewing-range large-imaging-area optical lens according to claim 1,2, 3 or 4, wherein between a half-image height ImaH of the optical system and a focal length f of the optical system: imaH/f is less than or equal to 1.26.
6. A method of imaging a large-viewing-range large-imaging-area optical lens as claimed in any one of claims 1 to 4, comprising the 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.
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| CN202210477871.7A CN114942511B (en) | 2022-05-05 | 2022-05-05 | Large-view-range large-imaging-area optical lens and imaging method thereof |
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Citations (6)
| 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 |
-
2022
- 2022-05-05 CN CN202210477871.7A patent/CN114942511B/en active Active
Patent Citations (6)
| 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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