CN115453707A - Vehicle-mounted panoramic module and panoramic camera system - Google Patents
Vehicle-mounted panoramic module and panoramic camera system Download PDFInfo
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- CN115453707A CN115453707A CN202211099114.7A CN202211099114A CN115453707A CN 115453707 A CN115453707 A CN 115453707A CN 202211099114 A CN202211099114 A CN 202211099114A CN 115453707 A CN115453707 A CN 115453707A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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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
- 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
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
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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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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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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- 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
- G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
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- Optics & Photonics (AREA)
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Abstract
The application relates to the technical field of optics, especially, relate to a module and panorama camera system are looked around to on-vehicle. The vehicle-mounted all-round looking module comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged along the optical axis of the lens from the object space to the imaging surface of the lens; the first lens has negative focal power, the second lens has negative focal power, the third lens has positive focal power, the fourth lens has positive focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, and the seventh lens has positive focal power. Through the reasonable collocation of each lens, can effectively improve the holistic image quality of camera lens, can shoot high image quality's image equally under darker environment such as low light or night to have the little advantage of the focus drift volume that high low temperature produced, make the camera lens adaptable different temperature occasions, temperature control is good.
Description
Technical Field
The application relates to the technical field of optics, especially, relate to a module and panorama camera system are looked around to on-vehicle.
Background
In recent years, with the rapid development of the industry of high-definition camera vehicle-mounted modules, the panoramic module is more and more applied to various vehicles; however, the lens of the existing panoramic module generally has the problem of poor imaging effect, and especially cannot meet the use requirements in dark environments such as at night.
The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form any part of the prior art nor form prior art that may be taught to a person of ordinary skill in the art.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The invention aims to provide a vehicle-mounted panoramic module and a panoramic camera system with good imaging effect.
The invention provides a vehicle-mounted looking-around module, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are sequentially arranged along the direction from an object space to an imaging surface of an optical axis of the vehicle-mounted looking-around module;
the first lens has a negative optical power, the second lens has a negative optical power, the third lens has a positive optical power, the fourth lens has a positive optical power, the fifth lens has a positive optical power, the sixth lens has a negative optical power, and the seventh lens has a positive optical power.
Further, an object side surface of the first lens is convex along the optical axis, and an image side surface of the first lens is concave along the optical axis;
an object side surface of the second lens is convex along the optical axis, and an image side surface of the second lens is concave along the optical axis;
an object side surface of the third lens is concave along the optical axis, and an image side surface of the third lens is convex along the optical axis;
an object side surface of the fourth lens is concave along the optical axis, and an image side surface of the fourth lens is convex along the optical axis;
an object side surface and an image side surface of the fifth lens are both convex along the optical axis;
an object side surface and an image side surface of the sixth lens are both concave along the optical axis;
an object side surface and an image side surface of the seventh lens are both convex along the optical axis.
Further, the first lens and the fifth lens are glass spherical lenses, and the second lens, the third lens, the fourth lens, the sixth lens and the seventh lens are plastic aspherical lenses.
Further, the vehicle-mounted panoramic module further comprises a diaphragm, and the diaphragm is arranged between the fourth lens and the fifth lens.
Further, a visible light filter is arranged between the seventh lens and the imaging surface; or, the object side surface of the fourth lens is plated with a visible light filtering film layer.
Further, the on-vehicle module of looking around satisfies: 2 theta is greater than 180 degrees, wherein 2 theta is the full field angle of the vehicle-mounted all-around module.
Further, the on-vehicle module of looking around satisfies: 1.4 and are woven into a fabric (F # < 1.8), wherein F # is the diaphragm number of the vehicle-mounted looking-around module.
Further, the on-vehicle module of looking around satisfies: 2<T L /h<4, wherein, T L The total optical length of the vehicle-mounted panoramic module is h, and the image surface height of the vehicle-mounted panoramic module is h.
Further, the on-vehicle module of looking around satisfies: -0.8 < phi 12 /φ＜-0.5，0.1＜φ 34 /φ＜0.4，0.3＜φ 5 /φ＜0.7，0＜φ 67 /φ＜0.1；
Wherein phi is the focal power of the vehicle-mounted all-round viewing module 12 Is the combined power of the first lens and the second lens, phi 34 Is the combined power of the third lens and the fourth lens, phi 5 Is the power of the fifth lens, phi 67 Is the combined optical power of the sixth lens and the seventh lens.
Further, the on-vehicle module of looking around satisfies: SD1/h is less than 1.3;
SD1 is the semi-caliber of the first lens, and h is the image surface height of the vehicle-mounted all-round module.
Further, the on-vehicle module of looking around satisfies: 15 < CRA < 25, R15 < -2;
the CRA is a chief ray angle of the vehicle-mounted all-round viewing module, and R15 is a curvature radius of an image space surface of the seventh lens.
Further, the on-vehicle module of looking around satisfies: (V5 + V7)/V6 >4, V5>70, (R7-R10)/R12 >4;
wherein V5 is the abbe number of the fifth lens, V6 is the abbe number of the sixth lens, and V7 is the abbe number of the seventh lens;
wherein R7 is a radius of curvature of an object side surface of the fourth lens element, R10 is a radius of curvature of an object side surface of the fifth lens element, and R12 is a radius of curvature of an object side surface of the sixth lens element.
Further, the on-vehicle module of looking around satisfies: (R6 + R11)/R14 < -4,. DELTA.h 80 °/. DELTA.h 0 ° >0.7;
wherein R6 is a radius of curvature of an image side surface of the third lens, R11 is a radius of curvature of an image side surface of the fifth lens, and R14 is a radius of curvature of an object side surface of the seventh lens;
where Δ h0 ° represents the imaging size at a field angle of 0 ° to 1 °, and Δ h80 ° represents the imaging size at a field angle of 79 ° to 80 °.
The invention provides a panoramic camera system, which comprises two groups of vehicle-mounted looking-around modules, wherein the two groups of vehicle-mounted looking-around modules are oppositely arranged in a centrosymmetric mode.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a vehicle-mounted looking-around module, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens to the seventh lens are sequentially arranged along the optical axis of a lens from the object space of the lens to the imaging surface; the first lens has negative focal power, the second lens has negative focal power, the third lens has positive focal power, the fourth lens has positive focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, and the seventh lens has positive focal power. Through the reasonable collocation of each lens, can effectively improve the holistic image quality of camera lens, can shoot high image quality's image equally under darker environment such as low light or night to have the little advantage of the focus drift volume that high low temperature produced, make the camera lens adaptable different temperature occasions, temperature control is good.
The invention also provides a panoramic camera system which comprises the vehicle-mounted all-around module, so that the panoramic camera system also has all the beneficial effects of the vehicle-mounted all-around module.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is an imaging schematic diagram of a vehicle-mounted looking-around module according to an embodiment of the present invention;
FIG. 2 is a defocus graph of the vehicle-mounted panoramic module according to the embodiment of the present invention;
fig. 3 is a MTF graph of the vehicle-mounted looking-around module according to the embodiment of the present invention;
fig. 4 is a graph illustrating an illuminance curve of the vehicle-mounted panoramic module according to the embodiment of the present invention;
fig. 5 is a graph illustrating chief ray angles of the vehicle-mounted looking-around module according to the embodiment of the invention.
Reference numerals are as follows:
1-a first lens, 2-a second lens, 3-a third lens, 4-a fourth lens, 5-a fifth lens, 6-a sixth lens, 7-a seventh lens, 8-a diaphragm, 9-a visible light filter and 10-cover glass.
Detailed Description
The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various alternatives, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.
The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.
The utility model provides a module is looked around to on-vehicle that imaging quality is good under the clear, the temperature control of formation of image is good and low light or night condition is provided to the first aspect of this application.
In the embodiments of the present application, the first lens is the mostA lens close to an object (or a subject), and the seventh lens is a lens closest to an imaging plane (or a sensor chip). In the present application, the radius of curvature, the half-diameter and the thickness of the lens, and the total optical length (T) of the lens are all expressed in millimeters (mm) L ) An image plane height (h) and a focal length (f).
Further, the thickness of the lenses, the distance between the lenses and T L Is the distance measured based on the optical axis of the lens. Further, in the description of the shape of the lens, the expression that one surface of the lens is convex along the optical axis means that the paraxial region of the corresponding surface is convex, and the expression that one surface of the lens is concave along the optical axis means that the paraxial region of the corresponding surface is concave. Therefore, even when one surface of the lens is described as convex, the edge portion of the one surface of the lens may be concave. Also, even when one surface of the lens is described as concave, an edge portion of the one surface of the lens may be convex.
The vehicle-mounted looking-around module comprises seven lenses, for example, the vehicle-mounted looking-around module (hereinafter referred to as a lens) comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens to the seventh lens are sequentially arranged along the direction from the object side of the lens to the imaging surface of the lens along the optical axis of the lens.
The first lens has focal power; for example, the first lens has a negative power. The object side surface of the first lens is convex along the optical axis, and the image side surface of the first lens is concave along the optical axis. The first lens is a glass spherical lens; for example, both the object side surface and the image side surface of the first lens are spherical surfaces.
The second lens has focal power; for example, the second lens has a negative power. The object side surface of the second lens is convex along the optical axis, and the image side surface of the second lens is concave along the optical axis. The second lens is a plastic aspheric lens; for example, the object side surface and the image side surface of the second lens are both aspheric surfaces.
The third lens has focal power; for example, the third lens has positive optical power. An object side surface of the third lens is concave along the optical axis, and an image side surface of the third lens is convex along the optical axis. The third lens is a plastic aspheric lens; for example, both the object side surface and the image side surface of the third lens are aspherical surfaces.
The fourth lens has focal power; for example, the fourth lens has positive optical power. An object side surface of the fourth lens is concave along the optical axis, and an image side surface of the fourth lens is convex along the optical axis. The fourth lens is a plastic aspheric lens; for example, both the object side surface and the image side surface of the fourth lens are aspherical surfaces.
The fifth lens has focal power; for example, the fifth lens has positive optical power. Both the object side surface and the image side surface of the fifth lens are convex along the optical axis. The fifth lens is a glass spherical lens; for example, the object side surface and the image side surface of the fifth lens are both spherical surfaces.
The sixth lens has focal power; for example, the sixth lens has a negative power. The object side surface and the image side surface of the sixth lens are both concave along the optical axis. The sixth lens is a plastic aspheric lens; for example, both the object side surface and the image side surface of the sixth lens are aspherical surfaces.
The seventh lens has focal power; for example, the seventh lens has positive optical power. The object side surface and the image side surface of the seventh lens are both convex along the optical axis. The seventh lens is a plastic aspheric lens; for example, both the object side surface and the image side surface of the seventh lens are aspherical surfaces.
Any aspherical surface of the second lens, the third lens, the fourth lens, the sixth lens, and the seventh lens may be expressed by equation 1:
wherein z is the rise of the aspheric surface, c is the paraxial curvature of the aspheric surface, h is the effective radius value of the aspheric surface, K is the conic coefficient, and B-E is the high order term coefficient of the aspheric surface.
In some embodiments, the two side surfaces of all the lenses of the vehicle-mounted panoramic module are plated with high-transmittance multilayer films.
In some embodiments, the vehicle-mounted panoramic module may further include a diaphragm disposed between two adjacent lenses; for example, a diaphragm is provided between the fourth lens and the fifth lens.
The diaphragm can control the light flux better to do benefit to and improve the formation of image effect, guarantee also can shoot clear picture under the darker scene of light such as cloudy day or night. The diaphragm is arranged between the fourth lens and the fifth lens, so that the incident angle of the chief ray reaching the imaging surface can be effectively controlled within 13 +/-3 degrees, and the incident requirement of the sensor chip is better met.
Preferably, the diaphragm adopts the masking paper that the center is equipped with logical unthreaded hole, utilizes the masking paper to make the diaphragm, can reduce the requirement to the logical unthreaded hole of the lens cone of camera lens to a certain extent to the accuracy nature of processing is guaranteed to the at utmost, reduces machining error.
In some embodiments, the on-board looking-around module may further include a visible light filter, such as a visible light filter disposed between the seventh lens element and the imaging surface. The visible light filter can inhibit the light transmission of the non-working waveband, so that the chromatic aberration and parasitic light of the lens are effectively reduced, and the imaging effect is improved.
Alternatively, the visible light filter can be removed, and then the visible light filter film layer is plated on the object side surface of the fourth lens.
In some embodiments, the vehicle-mounted panoramic module further includes a cover glass, and if the seventh lens element is provided with a visible light filter facing the rear of the imaging surface, the cover glass is disposed behind the visible light filter; if no visible light filter is provided, the cover glass is arranged behind the seventh lens.
The second aspect of the application relates to a panoramic camera system, and the panoramic camera system includes two sets of aforementioned first aspects the on-vehicle module of looking around, two sets of on-vehicle modules of looking around set up with central symmetry's mode relatively.
The application relates to a module and panorama camera system are looked around to on-vehicle can satisfy following conditional expression:
in some embodiments, 2 θ >180 ° is satisfied;
in some embodiments, 1.4-Ap F # <1.8 is satisfied;
in some embodiments, satisfy 2<T L /h<4；
In some embodiments, a value of-0.8 < φ is satisfied 12 /φ＜-0.5；
In some embodiments, 0.1 < φ is satisfied 34 /φ＜0.4；
In some embodiments, 0.3 < φ is satisfied 5 /φ＜0.7；
In some embodiments, 0 < φ is satisfied 67 /φ＜0.1；
In some embodiments, SD1/h < 1.3;
in some embodiments, 15 < CRA < 25 is satisfied;
in some embodiments, R13 < -2;
in some embodiments, (V5 + V7)/V6 >4 is satisfied;
in some embodiments, V5>70 is satisfied;
in some embodiments, (R7-R10)/R12 >4 is satisfied;
in some embodiments, (R6 + R11)/R14 < -4 is satisfied;
in some embodiments, Δ h80 °/Δ h0 ° >0.7 is satisfied.
In the above expression, 2 θ is the full field angle of the vehicle-mounted looking-around module, F # is the F number of the vehicle-mounted looking-around module, and T L The total optical length of the vehicle-mounted all-round looking module, h the image surface height of the vehicle-mounted all-round looking module, phi the focal power of the vehicle-mounted all-round looking module, phi 12 Is the combined focal power of the first lens and the second lens, phi 34 Is the combined focal power of the third lens and the fourth lens, phi 5 Is the power of the fifth lens, phi 67 Is the combined focal power of the sixth lens and the seventh lens, SD1 is the half aperture of the first lens, CRA is the chief ray angle of the vehicle-mounted panoramic module, R15 is the curvature radius of the image side surface of the seventh lens, V5 is the Abbe number of the fifth lens, V6 is the Abbe number of the sixth lens, V7 is the Abbe number of the seventh lens, R7 is the Abbe number of the fourth lensA radius of curvature of an object side surface, R10 is a radius of curvature of an object side surface of the fifth lens, R12 is a radius of curvature of an object side surface of the sixth lens, R6 is a radius of curvature of an image side surface of the third lens, R11 is a radius of curvature of an image side surface of the fifth lens, R14 is a radius of curvature of an object side surface of the seventh lens, Δ h0 ° represents an imaging size at an angle of view of 0 ° to 1 °, Δ h80 ° represents an imaging size at an angle of view of 79 ° to 80 °.
Here, according to 2 θ >180 ° and 1.4 yarn bundle f # <1.8, at least the on-vehicle looking-around module can be ensured to have sufficiently good imaging quality; when the F number F # exceeds the upper limit, the correctable aberration residual quantity of the whole lens is excessive; when the F-number F # is lower than the lower limit, the aberration of the entire lens is too large, and the imaging quality is poor.
Further, according to 2<T L /h<4, can guarantee the sufficient good formation of image quality of camera lens at least, restrict the overall length of on-vehicle looking around the module simultaneously. When T is L When the value of/h exceeds the upper limit, the total length of the whole lens is too long; when T is L If the value of/h is lower than the lower limit, the focal power of each lens is too large, so that the lens aberration is difficult to correct, and the resolving power is significantly reduced.
Furthermore, according to-0.8 < phi 12 Phi is less than-0.5, at least object plane light with a wide field angle can be converged into the lens, and simultaneously F-Theta distortion of the lens is corrected without generating large aberration, so that the vehicle-mounted panoramic module has good enough imaging quality; when phi is 12 When the value of/phi exceeds the upper limit, the combined optical focal length of the front lens group formed by the first lens and the second lens is too strong, and the total length of the system can be reduced, but the generated spherical aberration is too large and is difficult to correct; when phi is 12 When the value of/phi exceeds the lower limit, the optical power of the front lens group is weakened, the spherical aberration is relatively reduced, but the refractive power of the front lens group is reduced, so that the total length of the system is lengthened.
Furthermore, according to 0.1 < φ 34 The/phi is less than 0.4, at least a middle lens group formed by the third lens and the fourth lens can be effectively matched with the front lens group, the whole focal power of the whole lens is mainly born, the vertical aberration is effectively corrected, and the vehicle-mounted panoramic module is ensured to have good enough imaging quality. When the value of phi 34/phi exceeds the upper limitIn the case of the lens, the total length of the system can be reduced by excessively strong optical power of the middle lens group, but spherical aberration, astigmatism and field curvature generated by the lens are excessively large and difficult to correct; when the value of 34/phi exceeds the lower limit, the power of the middle lens group decreases, the above-mentioned aberrations are relatively reduced, but the power decreases, leading to a lengthening of the system.
In addition, according to the condition that phi 5/phi is more than 0.3 and less than 0.7, at least the fifth lens can be effectively matched with the lens group, the high and low temperature drift amounts of the lens are effectively improved, and vertical aberration is corrected. When the value of phi 5/phi exceeds the upper limit, the optical focus of the fifth lens is too strong, the total length of the system can be reduced, but the generated spherical aberration, astigmatism and field curvature are too large and are difficult to correct; when the value of phi 5/phi exceeds the lower limit, the power of the fifth lens decreases, the above-mentioned aberrations are relatively reduced, but the power thereof decreases, resulting in a lengthening of the system.
In addition, according to 0 < φ 67 The/phi is less than 0.1, and the rear lens group formed by the sixth lens and the seventh lens can bear the lenses at least so as to effectively improve the aberration and improve the imaging quality. When phi is 67 If the value of/[ phi ] exceeds the limit, the aberration correction capability of the rear lens group is degraded.
In addition, according to the condition that SD1/h is less than 1.3, the good light-receiving effect of the lens can be at least ensured, and the overall size of the lens can be ensured not to be too large.
In addition, according to the conditions that 15 < CRA < 25 and R15 < 2, at least aberration can be effectively corrected, the chief ray angle of the lens is changed as much as possible, the compatibility of the chip of the lens is increased, and the types of optional chips are increased.
Therefore, according to (V5 + V7)/V6 >4, V5>70 and (R7-R10)/R12 >4, at least the correction of the axial chromatic aberration and the optical aberration can be performed well.
In addition, according to (R6 + R11)/R14 < -4 and delta h80 degree/delta h0 degree >0.7, the vehicle-mounted panoramic module can be ensured to have good F-Theta distortion and good compression ratio of the edge field and the central field of the image plane; meanwhile, the image height ratio of the central view field unit angle to the edge view field unit angle of the lens is larger than 0.7, so that the imaging ratio of the lens is close to the actual ratio of an object objectively existing.
Next, a vehicle-mounted see-around module according to a specific example will be described.
As shown in fig. 1, the vehicle-mounted see-around module includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, and a seventh lens 7.
The first lens 1 has a negative power, an object side surface of the first lens 1 is convex along the optical axis, and an image side surface of the first lens 1 is concave along the optical axis; the second lens 2 has a negative power, an object side surface of the second lens 2 is convex along the optical axis, and an image side surface of the second lens 2 is concave along the optical axis; the third lens 3 has positive power, the object side surface of the third lens 3 is concave along the optical axis, and the image side surface of the third lens 3 is convex along the optical axis; the fourth lens 4 has positive power, the object side surface of the fourth lens 4 is concave along the optical axis, and the image side surface of the fourth lens 4 is convex along the optical axis; the fifth lens 5 has positive power, and both the object side surface and the image side surface of the fifth lens 5 are convex along the optical axis; the sixth lens 6 has a negative power, and both the object-side surface and the image-side surface of the sixth lens 6 are concave along the optical axis; the seventh lens 7 has positive power, and both the object side surface and the image side surface of the seventh lens 7 are convex along the optical axis.
The vehicle-mounted all-round module further comprises a diaphragm 8, a visible light filter 9 and cover glass 10, the diaphragm 8 is arranged between the fourth lens 4 and the fifth lens 5, the visible light filter 9 is arranged behind the seventh lens 7, and the cover glass 10 is arranged behind the visible light filter 9.
In the vehicle-mounted see-around module of this example, the relevant parameters of each lens are shown in table 1.
TABLE 1
In the vehicle-mounted see-around module of this example, the aspherical characteristics of each lens are shown in table 2.
TABLE 2
| Surface number | K | B | C | D | E |
| S3 | 3.65E+01 | -2.87E-04 | 8.00E-06 | -1.70E-07 | 2.39E-09 |
| S4 | -4.75E-02 | 1.54E-04 | 6.59E-06 | 2.46E-07 | -1.24E-08 |
| S5 | -3.95E+00 | 5.07E-05 | 4.90E-06 | -3.79E-06 | 2.73E-06 |
| S6 | -8.16E+00 | 1.33E-04 | -3.22E-06 | 2.84E-07 | -2.15E-10 |
| S7 | -1.21E+00 | -1.89E-05 | -6.70E-06 | -8.46E-08 | 4.80E-08 |
| S8 | 5.58E+00 | -1.79E-04 | -4.18E-06 | 1.06E-06 | -1.84E-07 |
| S12 | -1.62E+00 | -3.17E-04 | -1.39E-06 | -2.22E-06 | 1.08E-07 |
| S13 | 1.02E+01 | -4.10E-04 | -5.59E-05 | 2.48E-06 | -1.08E-08 |
| S12 | -1.14E+00 | -8.13E-05 | -1.57E-06 | -9.39E-07 | 2.33E-08 |
| S13 | 1.87E+01 | -2.15E-04 | -8.82E-05 | 9.36E-07 | -7.19E-09 |
In tables 1 and 2, S1 and S2 represent the object-side surface and the image-side surface of the first lens, respectively, S3 and S4 represent the object-side surface and the image-side surface of the second lens, respectively, and so on.
In the vehicle-mounted looking-around module of this example, the values of the conditional expressions of the vehicle-mounted looking-around module are shown in table 3.
TABLE 3
Fig. 2 presents a defocus curve of the vehicle-mounted module for looking around of this example, fig. 3 presents an MTF curve of the vehicle-mounted module for looking around of this example, fig. 4 presents an illuminance curve of the vehicle-mounted module for looking around of this example, and fig. 5 presents a chief ray angle curve of the vehicle-mounted module for looking around of this example.
According to the above example, the vehicle-mounted looking-around module of the present application has the following advantages:
by adopting 2 glass spherical lenses and 5 plastic non-spherical lenses in matching and mixing, the lens has longer service life and higher stability, and simultaneously reduces the material and processing and assembling cost.
By adopting 2 glass spherical lenses and 5 plastic non-spherical lenses in a matched and mixed way, the aberration of the lens is effectively corrected, and the lens has the advantage of small focus drift amount generated by high and low temperature, so that the lens can adapt to different temperature occasions and has good temperature control.
The 2 glass spherical lenses and the 5 plastic aspheric lenses are matched and mixed for use, and the focal power of each lens is reasonably matched, so that the lens has an ultra-large field angle of more than 180 degrees, wherein the 5 aspheric lenses can effectively improve the integral imaging quality of the lens, reduce the integral optical total length of the lens as far as possible, and ensure that an image with high imaging quality can be shot in a darker environment.
The seventh lens uses an aspheric lens, so that the angle of a chief ray can be well controlled, the lens can be perfectly matched with the sensor, and the compatibility of a sensor chip of the lens is improved.
The utility model provides a central market of module is looked around to on-vehicle and the whole definition in edge market is high, and big light ring can satisfy the imaging definition under the low light level environment to increase the application range of camera lens.
While the present disclosure includes particular examples, it will be apparent from an understanding of the present disclosure that various changes in form and detail may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only and not for purposes of limitation. The description of features or aspects in each example will be considered applicable to similar features or aspects in other examples. Suitable results may be obtained if the described techniques were performed in a different order and/or if components in the described systems, architectures, devices, or circuits were combined in a different manner and/or were replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is defined not by the detailed description but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents are to be construed as being included in the present disclosure.
Claims (14)
1. A vehicle-mounted looking-around module is characterized by comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged along the direction from an object space to an imaging surface of an optical axis of the vehicle-mounted looking-around module;
the first lens has a negative optical power, the second lens has a negative optical power, the third lens has a positive optical power, the fourth lens has a positive optical power, the fifth lens has a positive optical power, the sixth lens has a negative optical power, and the seventh lens has a positive optical power.
2. The vehicle-mounted panoramic module of claim 1, wherein the object-side surface of the first lens is convex along the optical axis and the image-side surface of the first lens is concave along the optical axis;
an object side surface of the second lens is convex along the optical axis, and an image side surface of the second lens is concave along the optical axis;
an object side surface of the third lens is concave along the optical axis, and an image side surface of the third lens is convex along the optical axis;
an object side surface of the fourth lens is concave along the optical axis, and an image side surface of the fourth lens is convex along the optical axis;
an object side surface and an image side surface of the fifth lens are both convex along the optical axis;
an object side surface and an image side surface of the sixth lens are both concave along the optical axis;
an object side surface and an image side surface of the seventh lens are both convex along the optical axis.
3. The vehicle-mounted looking-around module of claim 1, wherein the first lens and the fifth lens are glass spherical lenses, and the second lens, the third lens, the fourth lens, the sixth lens and the seventh lens are plastic aspherical lenses.
4. The vehicle-mounted panoramic module of claim 1, further comprising a diaphragm disposed between the fourth lens and the fifth lens.
5. The vehicle-mounted panoramic module of claim 1, wherein a visible light filter is arranged between the seventh lens and the imaging surface;
or, the object side surface of the fourth lens is plated with a visible light filtering film layer.
6. The vehicle looking around module according to any one of claims 1 to 5, wherein said vehicle looking around module satisfies: 2 theta is greater than 180 degrees, wherein 2 theta is the full field angle of the vehicle-mounted all-around module.
7. The vehicle looking around module according to any one of claims 1 to 5, wherein said vehicle looking around module satisfies: 1.4< -F # <1.8, wherein F # is the diaphragm number of the vehicle-mounted looking-around module.
8. The vehicle looking around module according to any one of claims 1 to 5, wherein said vehicle looking around module satisfies: 2<T L /h<4, wherein, T L The total optical length of the vehicle-mounted panoramic module is h, and the image surface height of the vehicle-mounted panoramic module is h.
9. The vehicle mounted panoramic module of any of claims 1-5, characterized in thatCharacterized in that, the vehicle-mounted looking-around module satisfies: -0.8 < phi 12 /φ＜-0.5，0.1＜φ 34 /φ＜0.4，0.3＜φ 5 /φ＜0.7，0＜φ 67 /φ＜0.1；
Wherein phi is the focal power of the vehicle-mounted all-round viewing module 12 Is the combined power of the first lens and the second lens, phi 34 Is the combined power of the third lens and the fourth lens, phi 5 Is the power of the fifth lens, phi 67 Is the combined optical power of the sixth lens and the seventh lens.
10. The vehicle looking around module according to any one of claims 1 to 5, wherein said vehicle looking around module satisfies: SD1/h is less than 1.3;
SD1 is the semi-caliber of the first lens, and h is the image surface height of the vehicle-mounted all-round module.
11. The vehicle looking around module according to any one of claims 1 to 5, wherein said vehicle looking around module satisfies: CRA < 15 < 25, R15 < -2;
the CRA is a chief ray angle of the vehicle-mounted all-round viewing module, and R15 is a curvature radius of an image space surface of the seventh lens.
12. The vehicle looking around module according to any one of claims 1 to 5, wherein said vehicle looking around module satisfies: (V5 + V7)/V6 >4, V5>70, (R7-R10)/R12 >4;
wherein V5 is the abbe number of the fifth lens, V6 is the abbe number of the sixth lens, and V7 is the abbe number of the seventh lens;
wherein R7 is a radius of curvature of an object side surface of the fourth lens element, R10 is a radius of curvature of an object side surface of the fifth lens element, and R12 is a radius of curvature of an object side surface of the sixth lens element.
13. The vehicle looking around module according to any one of claims 1 to 5, wherein said vehicle looking around module satisfies: (R6 + R11)/R14 < -4, Δ h80 °/Δ h0 ° >0.7;
wherein R6 is a radius of curvature of an image side surface of the third lens, R11 is a radius of curvature of an image side surface of the fifth lens, and R14 is a radius of curvature of an object side surface of the seventh lens;
where Δ h0 ° represents the imaging size at a field angle of 0 ° to 1 °, and Δ h80 ° represents the imaging size at a field angle of 79 ° to 80 °.
14. A panoramic camera system, comprising two sets of the vehicle-mounted panoramic modules of any one of claims 1 to 13, wherein the two sets of the vehicle-mounted panoramic modules are arranged oppositely in a centrosymmetric manner.
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| CN202211099114.7A CN115453707A (en) | 2022-09-06 | 2022-09-06 | Vehicle-mounted panoramic module and panoramic camera system |
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