CN114859527A - Ultra-wide angle optical system - Google Patents
Ultra-wide angle optical system Download PDFInfo
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- CN114859527A CN114859527A CN202210646304.XA CN202210646304A CN114859527A CN 114859527 A CN114859527 A CN 114859527A CN 202210646304 A CN202210646304 A CN 202210646304A CN 114859527 A CN114859527 A CN 114859527A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 54
- 230000005499 meniscus Effects 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 13
- 238000005457 optimization Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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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
- 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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
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- 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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Abstract
The invention relates to the technical field of optical systems for automobile data recorders, in particular to an ultra-wide angle optical system. The lens comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged along the incident light path of light rays from left to right at intervals. The invention has the beneficial effects that: the system has high overall reliability and reduced assembly sensitivity, so that the yield is improved, the cost is reduced, and the large-scale production is facilitated; the large field angle and the large light-passing aperture are ensured, the light inlet quantity is sufficient, and the edge imaging quality is good.
Description
Technical Field
The invention relates to the technical field of optical systems for automobile data recorders, in particular to an ultra-wide angle optical system.
Background
Along with the popularization of automobiles, more and more automobiles are provided with vehicle-mounted automobile data recorder lenses, and after the automobile data recorders are installed, video images and sounds of the whole automobile driving process can be recorded, so that evidence can be provided for traffic accidents. However, the diagonal shooting angles of the optical lens for the existing vehicle-mounted automobile data recorder are smaller than 90 degrees, 100 degrees and 120 degrees; moreover, the shot picture is insufficient in definition and limited in visual field, and the observation effect is influenced.
The prior art has few solutions to the above problems, and the idea is often focused on the structural design of the optical lens holder or base apart from the optical lens design itself; but also causes the problems of increased cost of the actual product, complicated structure, troublesome operation or weak durability and easy damage.
Therefore, it is necessary to design an optical lens that realizes wide-angle photographing at the optical system level while ensuring the imaging quality.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the optical lens for the existing vehicle-mounted automobile data recorder has a small angle shooting angle, and the definition and the visual field of a shot picture are limited.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path.
The invention has the beneficial effects that: the system has high overall reliability and reduced assembly sensitivity, so that the yield is improved, the cost is reduced, and the large-scale production is facilitated; the large field angle and the large light-passing aperture are ensured, the light inlet quantity is sufficient, and the edge imaging quality is good.
As a further improvement of the invention, the technical problems to be solved are as follows: the light collection effect of the lens needs to be further optimized through the structural design.
In order to solve the technical problems, the invention further adopts the following improved technical scheme: the first lens element L1 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the second lens element L2 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the third lens element L3 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the fourth lens element L4 is a meniscus positive lens element with a concave object-side surface and a convex image-side surface; the fifth lens element L5 is a biconvex positive lens element, and both the object-side surface and the image-side surface thereof are convex surfaces; the sixth lens element L6 is a meniscus positive lens element with a concave object-side surface and a convex image-side surface.
The beneficial effect of the improvement is as follows: the meniscus lens with the convex surface facing outwards in the first lens can collect light rays with a large field of view as much as possible, so that the light rays enter the optical system; the second lens has negative focal power, so that the incident angle of the large-field-of-view ray can be further reduced, and the control of the main ray angle CRA is facilitated.
As a further improvement of the invention, the technical problems to be solved are as follows: the connection between the lenses needs to be further optimized.
In order to solve the technical problems, the invention further adopts the following improved technical scheme: the fifth lens L5 and the sixth lens L6 are cemented with each other to form a cemented lens.
The beneficial effect of the improvement is as follows: the light ray transition effect between the fourth lens and the fifth lens is better.
As a further improvement of the invention, the technical problems to be solved are as follows: the better imaging quality of the whole optical system needs to optimize the optical coefficient of the lens.
In order to solve the technical problems, the invention further adopts the following improved technical scheme: the first lens satisfies the relation: nd is more than or equal to 1.8, and Vd is less than or equal to 46; the second lens satisfies the relation: nd is more than or equal to 1.65, and Vd is more than or equal to 33.8; the third lens satisfies the relation: nd is more than or equal to 1.85, and Vd is less than or equal to 23; the fourth lens satisfies the relation: nd is more than or equal to 1.75, and Vd is less than or equal to 52.3; the fifth lens satisfies the relation: nd is more than or equal to 1.5, and Vd is more than or equal to 81.6; the sixth lens satisfies the relation: nd is more than or equal to 1.5, Vd is more than or equal to 17.9, wherein the Nd refractive index is, and the Vd is the Abbe number.
The beneficial effect of the improvement is as follows: the optical system composed of the lenses has short total length of an optical path, small volume of a lens and large back focus, and can be matched with cameras with various interfaces for use; meanwhile, the system has a large aperture and excellent imaging quality.
As a further improvement of the invention, the technical problems to be solved are as follows: the proportional distribution of the optical system powers needs to be optimized.
In order to solve the technical problems, the invention further adopts the following improved technical scheme: the focal length of the optical system is f, the secondThe focal lengths of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are respectively f 1 、f 2 、f 3 、f 4 、f 5 F6, wherein f 1 、f 2 、f 3 、f 4 、f 5 F6 and f satisfy the following ratio: -6<f 1 /f<-5，-3<f 2 /f<-2，3<f 3 /f<4，-2<f 4 /f<-1，1<f 5 /f<2，10<f6/f<11。
The beneficial effect of the improvement is as follows: the focal power of the optical system formed by the invention is reasonably distributed according to the proportion, and each lens is in a certain proportion relative to the focal length of the system, so that the aberration of the optical system formed by the invention in the wavelength range of 435-656 nm is reasonably corrected and balanced.
As a further improvement of the invention, the technical problems to be solved are as follows:
in order to solve the technical problems, the invention further adopts the following improved technical scheme: a STOP is disposed between the second lens L2 and the third lens L3.
As a further improvement of the invention, the technical problems to be solved are as follows: in order to further optimize the imaging quality of the optical system.
In order to solve the technical problems, the invention further adopts the following improved technical scheme: a filter L7 is disposed behind the sixth lens L6.
As a further improvement of the invention, the technical problems to be solved are as follows: the structure and material of the lens in the optical system also need to be controlled for cost and efficiency improvement.
In order to solve the technical problems, the invention further adopts the following improved technical scheme: the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are spherical lenses and are all made of glass.
The beneficial effect of the improvement is as follows: the design of all glass is adopted, so that the structure is simpler, and the size and the quality are smaller.
Drawings
FIG. 1 is a schematic diagram of the internal structure of the lens of the imaging plane of the optical system of the present invention.
Fig. 2 is a graph of MTF of the optical system of the present invention.
FIG. 3 is a through focus MTF plot for an optical system of the present invention.
Fig. 4 is a table showing the radius of curvature R, the thickness d, the refractive index and the abbe number of each lens in example 1 of the optical system of the present invention.
The text labels are denoted as L1, first lens; l2, second lens; l3, third lens; l4, fourth lens; l5, fifth lens; l6, sixth lens; l7, optical filters; STOP, STOP.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Example 1:
the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path.
Example 2:
as a further optimization of the above embodiment: the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path. The first lens element L1 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the second lens element L2 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the third lens element L3 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the fourth lens element L4 is a meniscus positive lens element with a concave object-side surface and a convex image-side surface; the fifth lens element L5 is a biconvex positive lens element, and both the object-side surface and the image-side surface thereof are convex surfaces; the sixth lens element L6 is a meniscus positive lens element with a concave object-side surface and a convex image-side surface.
Example 3:
as a further optimization of the above embodiment: the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path. The first lens element L1 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the second lens element L2 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the third lens element L3 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the fourth lens element L4 is a meniscus positive lens element with a concave object-side surface and a convex image-side surface; the fifth lens element L5 is a biconvex positive lens element, and both the object-side surface and the image-side surface thereof are convex surfaces; the sixth lens element L6 is a meniscus positive lens element with a concave object-side surface and a convex image-side surface; the fifth lens L5 and the sixth lens L6 are cemented with each other to form a cemented lens.
Example 4:
as a further optimization of the above embodiment: the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path. The first lens satisfies the relation: nd is more than or equal to 1.8, and Vd is less than or equal to 46; the second lens satisfies the relation: nd is more than or equal to 1.65, and Vd is more than or equal to 33.8; the third lens satisfies the relation: nd is more than or equal to 1.85, and Vd is less than or equal to 23; the fourth lens satisfies the relation: nd is more than or equal to 1.75, and Vd is less than or equal to 52.3; the fifth lens satisfies the relation: nd is more than or equal to 1.5, and Vd is more than or equal to 81.6; the sixth lens satisfies the relation: nd is more than or equal to 1.5, Vd is more than or equal to 17.9, wherein the Nd refractive index is, and the Vd is the Abbe number.
Example 5:
as a further optimization of the above embodiment: an ultra-wide angle optical system comprises a first lens L1 and a second lens L1 arranged along a light incident path from left to right at intervals in sequenceTwo lenses L2, STOP, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6. The focal length of the optical system is f, and the focal lengths of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are respectively f 1 、f 2 、f 3 、f 4 、f 5 F6, wherein f 1 、f 2 、f 3 、f 4 、f 5 F6 and f satisfy the following ratio: -6<f 1 /f<-5，-3<f 2 /f<-2，3<f 3 /f<4，-2<f 4 /f<-1，1<f 5 /f<2，10<f6/f<11。
Example 6:
as a further optimization of the above embodiment: the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path. A STOP is disposed between the second lens L2 and the third lens L3.
Example 7:
as a further optimization of the above embodiment: the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path. A filter L7 is disposed behind the sixth lens L6.
Example 8:
as a further optimization of the above embodiment: the super-wide-angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged from left to right at intervals along a light incident light path. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are spherical lenses and are all made of glass.
As a further optimization of the above embodiment: as shown in fig. 4, in example 1, six lenses are used as an example, and by reasonably distributing the focal power, the surface shape, the center thickness of each lens, the on-axis distance between each lens, and the like of each lens, the field angle of the lens is effectively enlarged, the total length of the lens is shortened, and the distortion and the illumination of the lens are ensured; the resolution and the imaging quality of the lens are improved.
In an embodiment, the optical system achieves the following technical criteria:
1) focal length: EFFL 2.27 mm; (2) the diaphragm F is 2.0; (3) the field angle: 2w is more than or equal to 208 degrees; (4) optical distortion: (ii) the diameter of the imaging circle is less than 100% (5) and is greater than phi 6.6; (6) the working wave band is as follows: 430-700 nm; (7) the total optical length TTL is less than or equal to 15.8mm, and the optical back intercept BFL is more than or equal to 2.8 mm; (8) the lens is suitable for two million-pixel CCD or CMOS cameras.
From fig. 2 and fig. 3, it can be seen that the optical system has excellent imaging quality and completely meets the requirement of two million-pixel shooting.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the above technical features may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (8)
1. An ultra-wide angle optical system, comprising: an ultra-wide angle optical system comprises a first lens L1, a second lens L2, a diaphragm STOP, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 which are sequentially arranged along a light incident optical path from left to right at intervals.
2. An ultra-wide angle optical system as claimed in claim 1, wherein: the first lens element L1 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the second lens element L2 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the third lens element L3 is a negative meniscus lens element with a convex object-side surface and a concave image-side surface; the fourth lens element L4 is a meniscus positive lens element, and has a concave object-side surface and a convex image-side surface; the fifth lens element L5 is a biconvex positive lens element, and both the object-side surface and the image-side surface thereof are convex surfaces; the sixth lens element L6 is a meniscus positive lens element with a concave object-side surface and a convex image-side surface.
3. An ultra-wide angle optical system as claimed in claim 1, wherein: the fifth lens L5 and the sixth lens L6 are cemented with each other to form a cemented lens.
4. An ultra-wide angle optical system as claimed in claim 1, wherein: the first lens satisfies the relation: nd is more than or equal to 1.8, and Vd is less than or equal to 46; the second lens satisfies the relation: nd is more than or equal to 1.65, and Vd is more than or equal to 33.8; the third lens satisfies the relation: nd is more than or equal to 1.85, and Vd is less than or equal to 23; the fourth lens satisfies the relation: nd is more than or equal to 1.75, and Vd is less than or equal to 52.3; the fifth lens satisfies the relation: nd is more than or equal to 1.5, and Vd is more than or equal to 81.6; the sixth lens satisfies the relation: nd is more than or equal to 1.5, Vd is more than or equal to 17.9, wherein the Nd refractive index is, and the Vd is the Abbe number.
5. An ultra-wide angle optical system as claimed in claim 1, wherein: the focal length of the optical system is f, and the first lens L1, the second lens L2, the third lens L3 and the fourth lensThe focal lengths of the L4, the fifth lens L5 and the sixth lens L6 are respectively f 1 、f 2 、f 3 、f 4 、f 5 、f 6 Wherein f is 1 、f 2 、f 3 、f 4 、f 5 、f 6 And f satisfy the following ratio: -6<f 1 /f<-5，-3<f 2 /f<-2，3<f 3 /f<4，-2<f 4 /f<-1，1<f 5 /f<2，10<f 6 /f<11。
6. An ultra-wide angle optical system as claimed in claim 1, wherein: a STOP is disposed between the second lens L2 and the third lens L3.
7. An ultra-wide angle optical system as claimed in claim 1, wherein: a filter L7 is disposed behind the sixth lens L6.
8. An ultra-wide angle optical system as claimed in claim 1, wherein: the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are spherical lenses and are all made of glass.
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| CN202210646304.XA CN114859527A (en) | 2022-06-08 | 2022-06-08 | Ultra-wide angle optical system |
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| CN202210646304.XA CN114859527A (en) | 2022-06-08 | 2022-06-08 | Ultra-wide angle optical system |
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|---|---|---|---|---|
| US20010038496A1 (en) * | 2000-03-29 | 2001-11-08 | Yasushi Yamamoto | Taking lens device |
| JP2007139985A (en) * | 2005-11-16 | 2007-06-07 | Ricoh Opt Ind Co Ltd | Super-wide-angle lens |
| US20140293100A1 (en) * | 2013-03-28 | 2014-10-02 | Toshihiro Sasaya | Imaging optical system and imaging equipment |
| JP2015197615A (en) * | 2014-04-02 | 2015-11-09 | キヤノン株式会社 | Compound eye optical instrument |
| JP2016114693A (en) * | 2014-12-12 | 2016-06-23 | ソニー株式会社 | Imaging device and electronic apparatus |
| CN210376838U (en) * | 2019-07-22 | 2020-04-21 | 福建福光天瞳光学有限公司 | 2.8mm high-definition super wide-angle lens |
| CN114236780A (en) * | 2021-12-23 | 2022-03-25 | 福建福光天瞳光学有限公司 | Wide-angle high-resolution lens |
| CN217821060U (en) * | 2022-06-08 | 2022-11-15 | 湖南博明英光学科技有限公司 | Large-angle vehicle-mounted automobile data recorder lens |
-
2022
- 2022-06-08 CN CN202210646304.XA patent/CN114859527A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010038496A1 (en) * | 2000-03-29 | 2001-11-08 | Yasushi Yamamoto | Taking lens device |
| JP2007139985A (en) * | 2005-11-16 | 2007-06-07 | Ricoh Opt Ind Co Ltd | Super-wide-angle lens |
| US20140293100A1 (en) * | 2013-03-28 | 2014-10-02 | Toshihiro Sasaya | Imaging optical system and imaging equipment |
| JP2015197615A (en) * | 2014-04-02 | 2015-11-09 | キヤノン株式会社 | Compound eye optical instrument |
| JP2016114693A (en) * | 2014-12-12 | 2016-06-23 | ソニー株式会社 | Imaging device and electronic apparatus |
| CN210376838U (en) * | 2019-07-22 | 2020-04-21 | 福建福光天瞳光学有限公司 | 2.8mm high-definition super wide-angle lens |
| CN114236780A (en) * | 2021-12-23 | 2022-03-25 | 福建福光天瞳光学有限公司 | Wide-angle high-resolution lens |
| CN217821060U (en) * | 2022-06-08 | 2022-11-15 | 湖南博明英光学科技有限公司 | Large-angle vehicle-mounted automobile data recorder lens |
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