CN115437115B - Vehicle-mounted OMS (open mobile station) camera lens and imaging method thereof - Google Patents
Vehicle-mounted OMS (open mobile station) camera lens and imaging method thereof Download PDFInfo
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- CN115437115B CN115437115B CN202211134357.XA CN202211134357A CN115437115B CN 115437115 B CN115437115 B CN 115437115B CN 202211134357 A CN202211134357 A CN 202211134357A CN 115437115 B CN115437115 B CN 115437115B
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- 238000003384 imaging method Methods 0.000 title claims abstract description 27
- 230000003287 optical effect Effects 0.000 claims abstract description 44
- 230000005499 meniscus Effects 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000391 smoking effect 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
- G02B13/005—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
- 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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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Abstract
The invention relates to a vehicle-mounted OMS (object-oriented system) camera lens and an imaging method thereof, wherein an optical system of the lens consists of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus negative lens, the second lens is a plano-concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a plano-convex positive lens, the fifth lens is a biconcave negative lens, the sixth lens is a biconvex positive lens, the seventh lens is a biconvex positive lens, and the fifth and sixth lenses are cemented lens groups. The lens has the advantages of high imaging definition, large light-transmitting aperture, low tolerance sensitivity, good high-low temperature stability and the like through reasonable lens collocation, and simultaneously has a large field angle, so that passengers and scenery information in the vehicle can be obtained more comprehensively.
Description
Technical Field
The invention relates to a vehicle-mounted OMS (open mobile station) camera lens and an imaging method thereof.
Background
With the continuous development of intelligent driving, the market demand of an in-cabin personnel monitoring system (OMS) as an intelligent driving support is increasing. The extended OMS system serving as the Driver Monitoring System (DMS) not only can monitor the state of a driver and remind dangerous behaviors such as fatigue driving, smoking, call receiving and the like, but also can monitor the behaviors of other passengers in the vehicle, including monitoring safety problems such as whether children use safety belts and whether the children remain in the vehicle or not, and protecting the driving safety.
The camera lens is used as an image acquisition component of the OMS system, so that the acquired image is required to have high definition, and information such as the identity, the position and the gesture of a passenger in the vehicle can be accurately analyzed. Because the system is in a long-time working state, good environmental stability can ensure imaging stability, and a lens is required to have a larger field angle. Currently, the field angle of an imaging lens available for an OMS system is generally smaller than 120 °, so that an optical lens with a larger field angle is required to achieve maximum acquisition of image information in a vehicle.
Disclosure of Invention
The invention aims to provide a vehicle-mounted OMS (OMS) camera lens and an imaging method thereof, wherein the camera lens meets the requirements of high resolution and good environmental stability, increases the angle of view of an imaging system, and can acquire more comprehensive in-vehicle information.
The technical scheme of the invention is as follows: the optical system of the vehicle-mounted OMS camera lens consists of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus negative lens, the second lens is a plano-concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a plano-convex positive lens, the fifth lens is a biconcave negative lens, the sixth lens is a biconvex positive lens, the seventh lens is a biconvex positive lens, and the fifth and sixth lenses are cemented lens groups.
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, the sixth lens and the seventh lens are respectively、、、，、、Wherein、、、、、、And (3) withThe following proportions are satisfied: -3.5</<-1.5，-2.5</<-0.5，4.0</<6.0，1.5</<3.5，-2.5</<-0.5，0.5</<2.5，4.5</<6.5。
Further, the first lens satisfies the relation:≥1.5， Less than or equal to 50.0; the second lens satisfies the relation: ≥1.5， more than or equal to 50.0; the third lens satisfies the relation: ≥1.5， less than or equal to 50.0; the fourth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the fifth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the sixth lens satisfies the relation: ≥1.5， More than or equal to 50.0; the seventh lens satisfies the relation: ≥1.5， More than or equal to 50.0; wherein the method comprises the steps of In order to be of a 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 6.0.
Further, the F number of the optical system is less than or equal to 2.4.
Further, the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 2.0.
Further, the first to seventh lenses are each made of a glass material.
Further, the first lens to the seventh lens are all glass spherical lenses.
An imaging method applied to a vehicle-mounted OMS (object-oriented system) camera lens is characterized in that light rays sequentially pass through a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens from left to right and then are imaged.
Compared with the prior art, the invention has the following advantages:
1. the imaging angle of the lens to the object is larger than 150 degrees, and the lens has the advantages of high imaging definition, large light-transmitting aperture, low tolerance sensitivity, good high-low temperature stability and the like, and can monitor the in-vehicle scene more comprehensively;
2. By reasonably matching each optical lens, the system has compact and reasonable structure, easy assembly and low tolerance sensitivity, and is more suitable for large-scale high-yield production;
3. The seven optical lenses are all made of glass materials, and compared with the plastic lens, the glass lens has strong light transmission capability and can better adapt to various environment brightness conditions;
4. the displacement of the focusing surface can be well compensated at high temperature and low temperature, and the complex environment adaptability is realized;
5. The axial chromatic aberration, vertical chromatic aberration and high-order chromatic aberration are corrected, and the imaging system can have higher imaging quality at a large angle.
Drawings
FIG. 1 is a schematic view of an optical structure according to a first embodiment of the present invention;
FIG. 2 is a graph of full band axial chromatic aberration for a first embodiment of the invention;
FIG. 3 is a vertical axis color difference chart of the full operating band according to the first embodiment of the present invention;
FIG. 4 is a graph showing distortion of the full working wave Duan Changqu according to one embodiment of the present invention;
FIG. 5 is a schematic diagram of an optical structure of a second embodiment of the present invention;
FIG. 6 is a graph of full band axial chromatic aberration for a second embodiment of the present invention;
FIG. 7 is a vertical axis color difference chart of the second embodiment of the present invention;
FIG. 8 is a diagram illustrating distortion of a full wave Duan Changqu in accordance with a second embodiment of the present invention;
In the figure: l1-a first lens; l2-a second lens; l3-a third lens; l4-fourth lens; STO-diaphragm; l5-fifth lens; l6-sixth lens; l7-seventh 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 of the vehicle-mounted OMS camera lens consists of a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a diaphragm STO, a fifth lens L5, a sixth lens L6 and a seventh lens L7 which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus negative lens, the second lens is a plano-concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a plano-convex positive lens, the fifth lens is a biconcave negative lens, the sixth lens is a biconvex positive lens, the seventh lens is a biconvex positive lens, and the fifth and sixth lenses are cemented lens groups.
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, the sixth lens and the seventh lens are respectively、、、，、、Wherein、、、、、、And (3) withThe following proportions are satisfied: -3.5</<-1.5，-2.5</<-0.5，4.0</<6.0，1.5</<3.5，-2.5</<-0.5，0.5</<2.5，4.5</<6.5。
In this embodiment, the first lens satisfies the relationship:≥1.5， Less than or equal to 50.0; the second lens satisfies the relation: ≥1.5， more than or equal to 50.0; the third lens satisfies the relation: ≥1.5， less than or equal to 50.0; the fourth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the fifth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the sixth lens satisfies the relation: ≥1.5， More than or equal to 50.0; the seventh lens satisfies the relation: ≥1.5， More than or equal to 50.0; wherein the method comprises the steps of In order to be of a 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 6.0.
In this embodiment, the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 2.0.
In this embodiment, the first lens to the seventh lens are all glass spherical lenses. The first lens and the second lens are glass spherical lenses with negative focal power, and the glass spherical lenses have the function of reducing distortion of an optical system while adjusting light rays with large angles. The fifth lens and the sixth lens form an achromatic double-cemented lens. The reasonable lens collocation ensures that the optical system realizes wide angle, large aperture, day-night confocal and low-temperature drift design, and simultaneously, the on-axis and off-axis aberration is well corrected, thus having better imaging quality.
In this embodiment, the technical indexes of the implementation of the optical system are as follows:
(1) Focal length: EFFL mm or more and 2.0 mm or less;
(2) F is less than or equal to 2.4;
(3) Angle of view: 2w is more than or equal to 150 degrees;
(4) Working wave band: visible light band and 940nm band.
In this embodiment, to achieve the above design parameters, the specific designs adopted by the optical system are as follows:
。
example two refer to FIGS. 5-8
The optical system of the vehicle-mounted OMS camera lens consists of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus negative lens, the second lens is a plano-concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a plano-convex positive lens, the fifth lens is a biconcave negative lens, the sixth lens is a biconvex positive lens, the seventh lens is a biconvex positive lens, and the fifth and sixth lenses are cemented lens groups.
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, the sixth lens and the seventh lens are respectively、、、，、、Wherein、、、、、、And (3) withThe following proportions are satisfied: -3.5</<-1.5，-2.5</<-0.5，4.0</<6.0，1.5</<3.5，-2.5</<-0.5，0.5</<2.5，4.5</<6.5。
In this embodiment, the first lens satisfies the relationship:≥1.5， Less than or equal to 50.0; the second lens satisfies the relation: ≥1.5， more than or equal to 50.0; the third lens satisfies the relation: ≥1.5， less than or equal to 50.0; the fourth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the fifth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the sixth lens satisfies the relation: ≥1.5， More than or equal to 50.0; the seventh lens satisfies the relation: ≥1.5， More than or equal to 50.0; wherein the method comprises the steps of In order to be of a 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 6.0.
In this embodiment, the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 2.0.
In this embodiment, the first lens to the seventh lens are all glass spherical lenses. The first lens and the second lens are glass spherical lenses with negative focal power, and the glass spherical lenses have the function of reducing distortion of an optical system while adjusting light rays with large angles. The fifth lens and the sixth lens form an achromatic double-cemented lens. The reasonable lens collocation ensures that the optical system realizes wide angle, large aperture, day-night confocal and low-temperature drift design, and simultaneously, the on-axis and off-axis aberration is well corrected, thus having better imaging quality.
In this embodiment, the technical indexes of the implementation of the optical system are as follows:
(1) Focal length: EFFL mm or more and 2.00 mm or less;
(2) F is less than or equal to 2.4;
(3) Angle of view: 2w is more than or equal to 150 degrees;
(4) Working wave band: visible light band and 940nm band.
In this embodiment, to achieve the above design parameters, the specific designs adopted by the optical system are as follows:
。
an imaging method applied to a vehicle-mounted OMS (object-oriented system) camera lens is characterized in that light rays sequentially pass through a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens from left to right and then are imaged.
The foregoing is only illustrative of the preferred embodiments of the present invention, and it will be apparent to those skilled in the art from this disclosure that, based on the teachings herein, no inventive effort is required to design a different form of on-board OMS camera lens, and equivalent changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention.
Claims (7)
1. The vehicle-mounted OMS imaging lens is characterized in that an optical system of the lens consists of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus negative lens, the second lens is a plano-concave negative lens, the third lens is a biconvex positive lens, the fourth lens is a plano-convex positive lens, the fifth lens is a biconcave negative lens, the sixth lens is a biconvex positive lens, the seventh lens is a biconvex positive lens, and the fifth and sixth lenses are cemented lens groups; 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, the sixth lens and the seventh lens are respectively、、、、、、Wherein、、、、、、And (3) withThe following proportions are satisfied: -3.5</<-1.5，-2.5</<-0.5，4.0</<6.0，1.5</<3.5，-2.5</<-0.5，0.5</<2.5，4.5</<6.5; The F number of the optical system is less than or equal to 2.4.
2. The vehicle-mounted OMS imaging lens of claim 1, wherein the first lens satisfies the relationship:≥1.5， Less than or equal to 50.0; the second lens satisfies the relation: ≥1.5， more than or equal to 50.0; the third lens satisfies the relation: ≥1.5， less than or equal to 50.0; the fourth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the fifth lens satisfies the relation: ≥1.5， Less than or equal to 50.0; the sixth lens satisfies the relation: ≥1.5， More than or equal to 50.0; the seventh lens satisfies the relation: ≥1.5， More than or equal to 50.0; wherein the method comprises the steps of In order to be of a refractive index,Is an abbe constant.
3. The vehicle-mounted OMS imaging lens according to claim 1, wherein an optical total length TTL of the optical system and a focal length f of the optical system satisfy: TTL/f is less than or equal to 6.0.
4. A vehicle-mounted OMS imaging lens according to claim 1,2 or 3, wherein the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 2.0.
5. The vehicle-mounted OMS imaging lens of claim 1, wherein each of the first to seventh lenses is made of a glass material.
6. The vehicle-mounted OMS imaging lens of claim 1,2, 3 or 5, wherein the first lens to seventh lens are all glass spherical lenses.
7. An imaging method applied to the vehicle-mounted OMS imaging lens of claim 1, 2, 3 or 5, wherein the light rays sequentially pass through the first lens, the second lens, the third lens, the fourth lens, the diaphragm, the fifth lens, the sixth lens and the seventh lens from left to right for imaging.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114200644A (en) * | 2021-11-29 | 2022-03-18 | 福建福光天瞳光学有限公司 | Vehicle-mounted optical lens |
| CN218413030U (en) * | 2022-09-19 | 2023-01-31 | 福建福光天瞳光学有限公司 | Vehicle-mounted OMS camera lens |
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| JP3491578B2 (en) * | 1999-11-02 | 2004-01-26 | 松下電器産業株式会社 | Imaging lens, electronic still camera and video camera |
| JP5433193B2 (en) * | 2008-09-29 | 2014-03-05 | 京セラオプテック株式会社 | Imaging lens and imaging apparatus |
| CN104880808B (en) * | 2015-06-12 | 2017-12-22 | 中山联合光电科技股份有限公司 | Small perspective distortion and ultra-wide angle optical system |
| CN109856758B (en) * | 2017-11-30 | 2021-08-24 | 信泰光学(深圳)有限公司 | Imaging lens |
| JP7020938B2 (en) * | 2018-01-31 | 2022-02-16 | 株式会社タムロン | Imaging lens and imaging device |
| CN209356747U (en) * | 2019-03-07 | 2019-09-06 | 南阳市海科光电有限责任公司 | A kind of big target surface wide-angle lens optical system |
| CN112285888B (en) * | 2020-11-04 | 2022-03-15 | 光虎光电科技(天津)有限公司 | Big light ring FA camera lens |
| CN113031230B (en) * | 2021-05-25 | 2021-09-10 | 江西联创电子有限公司 | Super wide-angle lens and imaging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200644A (en) * | 2021-11-29 | 2022-03-18 | 福建福光天瞳光学有限公司 | Vehicle-mounted optical lens |
| CN218413030U (en) * | 2022-09-19 | 2023-01-31 | 福建福光天瞳光学有限公司 | Vehicle-mounted OMS camera lens |
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