CN117111279B - Vehicle-mounted lens - Google Patents
Vehicle-mounted lens Download PDFInfo
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- CN117111279B CN117111279B CN202311379238.5A CN202311379238A CN117111279B CN 117111279 B CN117111279 B CN 117111279B CN 202311379238 A CN202311379238 A CN 202311379238A CN 117111279 B CN117111279 B CN 117111279B
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- 239000011521 glass Substances 0.000 claims abstract description 8
- 239000005357 flat glass Substances 0.000 claims description 21
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000005286 illumination Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 24
- 238000003384 imaging method Methods 0.000 description 10
- 230000004075 alteration Effects 0.000 description 8
- 238000012546 transfer Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000012937 correction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005303 weighing 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
-
- 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
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The application provides a vehicle-mounted lens. The vehicle-mounted lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object side to an image side, wherein the first lens and the second lens form a first group, the third lens and the eighth lens form a second group, and a diaphragm is arranged between the second lens and the third lens; the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are respectively glass lenses, and the eighth lens is a plastic lens; the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are respectively aspheric lenses; the following constraint relation is satisfied between the aperture size of the diaphragm and the focal length of the vehicle-mounted lens: f/D of 0.96-0 stop Less than or equal to 1.1. The method realizes the balance among resolution, image plane illumination and lens miniaturization of the vehicle-mounted lens under the condition of no vignetting.
Description
Technical Field
The application relates to the field of optical imaging, in particular to a vehicle-mounted lens.
Background
In recent years, the automobile intelligent driving assisting industry has rapidly developed along with the demands of markets and consumers, particularly, the distance measuring function in intelligent driving assisting is being widely applied to various types of vehicles, and the accuracy and safety requirements of the vehicle-mounted lens serving as a key element in the intelligent driving assisting distance measuring function are continuously improved.
Currently, in-vehicle lenses pursued in the market are often required to have better performance in terms of resolution, image plane illuminance and overall miniaturization. However, in the existing vehicle-mounted lens schemes on the market, due to the limitation of different emphasis points and higher design difficulty, trade-offs are usually made in three aspects, and compatibility among resolution, image plane illumination and overall miniaturization is difficult to achieve.
Therefore, the application provides a vehicle-mounted lens to solve the problem that three aspects of resolution, image plane illumination and overall miniaturization are difficult to be compatible.
Disclosure of Invention
An object of the present application is to provide a vehicle-mounted lens, which can solve at least one technical problem mentioned above. The specific scheme is as follows:
according to a first aspect of a specific embodiment of the present application, the present application provides an in-vehicle lens:
the lens system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object side to an image side, wherein the first lens and the second lens form a first group, the third lens to the eighth lens form a second group, and a diaphragm is arranged between the second lens and the third 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 glass lenses, respectively, and the eighth lens is a plastic lens; the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are aspherical lenses, respectively; the aperture size of the diaphragm and the focal length of the vehicle-mounted lens meet the following constraint relation: f/D of 0.96-0 stop Less than or equal to 1.1; wherein f is the focal length of the vehicle-mounted lens, D stop Is the aperture size of the diaphragm.
In one embodiment, each of the first lens, the fifth lens, the sixth lens, and the eighth lens has negative optical power; the second lens, the third lens, the fourth lens, and the seventh lens each have positive optical power.
In one embodiment, the on-vehicle lens, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens satisfy the following constraint relationship with the on-vehicle lens: -1.431 < f 1 /f＜-1.347；2.736＜f 2 /f＜2.889；2.375＜f 3 /f＜2.527；3.083＜f 4 /f＜3.208；-3.792＜f 5 /f＜-3.653；-152.77＜f 6 /f＜-138.88；1＜f 7 /f＜1.167；-1.5＜f 8 /f < -1.319; wherein f is the focal length of the vehicle-mounted lens, f 1 F is the focal length of the first lens 2 F is the focal length of the second lens 3 F is the focal length of the third lens 4 F is the focal length of the fourth lens 5 F is the focal length of the fifth lens 6 F is the focal length of the sixth lens 7 F is the focal length of the seventh lens 8 Is the focal length of the eighth lens.
In one embodiment, the first lens, the second lens, the diaphragm, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens satisfy the following constraint: -6.028 < f 12 /f＜-5.542；1.194＜f 38 /f＜1.778；0.05＜d 1s /D stop ＜0.15；0.08＜d 2s /D stop < 0.2; wherein f 12 F is the equivalent focal length from the first lens to the second lens 38 D is the equivalent focal length from the third lens to the eighth lens 1s D is the air gap between the second lens and the diaphragm 2s Is an air gap between the third lens and the diaphragm.
In one embodiment, the following constraint relationship is satisfied between the focal length of the on-vehicle lens and the image plane height of the on-vehicle lens: h is more than or equal to 0.618 img F is less than or equal to 0.674; wherein f is the focal length of the vehicle-mounted lens, H img The image plane height of the vehicle-mounted lens is the image plane height of the vehicle-mounted lens.
In one embodiment, the following constraint relationship is satisfied between the lens length of the vehicle-mounted lens and the image plane height of the vehicle-mounted lens: h is more than or equal to 0.116 img TTL is less than or equal to 0.133; wherein H is img And TTL is the lens length of the vehicle-mounted lens for the image plane height of the vehicle-mounted lens.
In one embodiment, the following constraint relationship is satisfied between the lens length of the vehicle-mounted lens and the back focal length of the vehicle-mounted lens: BFL/TTL is more than or equal to 0.026 and less than or equal to 0.029; wherein TTL is the lens length of the vehicle-mounted lens, and BFL is the back focal length of the vehicle-mounted lens.
In one embodiment, the vehicle-mounted lens is further provided with a plate glass; the plate glass is arranged between the second lens and the diaphragm and is attached to the diaphragm.
In one embodiment, the flat glass, the first lens, the second lens, and the third lens satisfy the following constraint relationship: d is more than or equal to 0.101 12 /TTL≤0.116；0.0175≤d 2c /TTL≤0.02；0.025≤d 3c TTL is less than or equal to 0.029; wherein d 12 D is the distance between the first lens and the second lens 2c D, the distance between the second lens and the flat glass 3c And TTL is the length of the vehicle-mounted lens for the distance between the third lens and the plate glass.
In one embodiment, the in-vehicle lens further includes: the optical filter is arranged between the image side and the eighth lens, and the optical filter is an infrared optical filter.
Compared with the prior art, the scheme provided by the embodiment of the application has at least the following beneficial effects:
the application provides a vehicle-mounted lens, this lens has set gradually first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens and eighth lens from object side to image side, and is provided with the diaphragm between second lens and the third lens. Wherein the diaphragm is used for controlling the intensity of the incoming light, can adjust the illumination of the image plane and is used for controlling the illumination of the image plane to a certain extentThe aberration and the illuminance are balanced and regulated, and the diaphragm is arranged at the position between the second lens and the third lens and used for controlling the caliber size of the first lens so as to meet the requirement of miniaturization of the whole size of the lens. In addition, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are respectively aspheric lenses, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are respectively glass lenses, and the eighth lens is a plastic lens. Through 7G 1P's structure, on the one hand because the wide refracting index selection of glass material can strengthen the aberration correction ability of camera lens, promotes the image surface resolution of camera lens under static temperature, on the other hand, the collocation of glass-plastic mixture, with the help of the comparatively easy processing feasibility of high order aspheric surface of plastic lens, can guarantee that on-vehicle camera lens still keeps higher uniformity and stability under great temperature difference change condition, satisfies the requirement of athermalization promptly. Further, in the present application, the aperture size of the diaphragm (exemplified as D stop ) Satisfies 0.96.ltoreq.f/D with the focal length (f is exemplified) of the vehicle-mounted lens stop And the constraint relation is less than or equal to 1.1, so as to ensure the image plane illumination of the vehicle-mounted lens imaging. On this basis, the vehicle-mounted lens that this application provided can realize that resolution, image plane illuminance and miniaturized three's of camera lens balance each other, has improved the accuracy and the security's of intelligent auxiliary drive's information acquisition level greatly.
Drawings
Fig. 1 is a schematic view of an in-vehicle lens provided by an example of the present application;
FIG. 2 is a schematic view of another in-vehicle lens provided by way of example herein;
FIG. 3 is a schematic diagram of a lens image quality modulation transfer function of an in-vehicle lens;
fig. 4 is a spot speckle diagram of the vehicle lens in different fields of view;
FIG. 5 is a schematic diagram of the image plane relative illuminance of the in-vehicle lens;
FIG. 6 is a schematic diagram of a lens image quality modulation transfer function of an in-vehicle lens;
FIG. 7 is a spot speckle pattern of a vehicle lens in different fields of view;
FIG. 8 is a schematic diagram of the image plane relative illuminance of an in-vehicle lens;
FIG. 9 is a schematic diagram of a lens image quality modulation transfer function of an in-vehicle lens;
FIG. 10 is a spot speckle pattern of a vehicle lens in different fields of view;
fig. 11 is a schematic diagram of the image plane relative illuminance of the in-vehicle lens.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings, wherein it is apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present application to describe, these descriptions should not be limited to these terms. These terms are only used to distinguish one from another. For example, a first may also be referred to as a second, and similarly, a second may also be referred to as a first, without departing from the scope of embodiments of the present application.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product 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 product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such element.
In particular, the symbols and/or numerals present in the description, if not marked in the description of the figures, are not numbered.
Alternative embodiments of the present application are described in detail below with reference to the accompanying drawings.
The embodiment provided by the application is an embodiment of the vehicle-mounted lens.
An embodiment of the present application is described in detail below with reference to fig. 1.
Fig. 1 is a schematic diagram of a vehicle lens provided by an exemplary embodiment of the present application, as shown in fig. 1, the vehicle lens is sequentially provided with a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5, a sixth lens P6, a seventh lens P7, and an eighth lens P8 from an object side to an image side, the first lens and the second lens form a first group, the third lens to the eighth lens form a second group, and a diaphragm S1 is disposed between the second lens P2 and the third lens P3. The first group refers to a lens group close to an object side in the internal structure of the vehicle-mounted lens, and the second group refers to a lens group close to an image side in the internal structure of the vehicle-mounted lens.
The first lens P1, the second lens P2, the third lens P3, the fourth lens P4, the fifth lens P5, the sixth lens P6 and the seventh lens P7 are respectively glass lenses, and the eighth lens P8 is a plastic lens. The first lens P1, the second lens P2, the third lens P3, the fourth lens P4, the fifth lens P5, the sixth lens P6, the seventh lens P7, and the eighth lens P8 are aspherical lenses, respectively.
The application provides a vehicle-mounted lens, the lens has set gradually first lens P1, second lens P2, third lens P3, fourth lens P4, fifth lens P5, sixth lens P6, seventh lens P7 and eighth lens P8 from object side to image side, and is provided with diaphragm S1 between second lens P2 and the third lens P3. The diaphragm S1 is used for controlling the size of the light entering amount, adjusting the illuminance of the image plane, balancing and adjusting the aberration and the illuminance to a certain extent, and the diaphragm S1 is placed at a position between the second lens P2 and the third lens P3, so as to control the caliber size of the first lens P1, thereby meeting the requirement of miniaturization of the whole size of the lens.
In addition, the first lens P1, the second lens P2, the third lens P3, the fourth lens P4, the fifth lens P5, the sixth lens P6, the seventh lens P7, and the eighth lens P8 are respectively aspheric lenses, and the first lens P1, the second lens P2, the third lens P3, the fourth lens P4, the fifth lens P5, the sixth lens P6, and the seventh lens P7 are respectively glass lenses, and the eighth lens P8 is a plastic lens for forming the structure of "7G 1P". On the one hand, due to wide refractive index selection of the glass material, the aberration correction capability of the lens can be enhanced, and the image plane resolution of the lens at the static temperature can be improved. On the other hand, the glass-plastic mixed matching is realized, and the processing feasibility of the higher-order aspheric surface easier to use by the plastic lens can ensure that the image quality resolution still keeps higher consistency and stability under the condition of larger temperature difference change, namely, the athermalization requirement is met.
Further, in the present application, the following constraint relationship is satisfied between the aperture size of the diaphragm S1 and the focal length of the vehicle lens:
0.96≤f / D stop ≤1.1。
wherein f is the focal length of the vehicle lens, D stop When the constraint relation is satisfied between the focal length of the vehicle-mounted lens and the aperture size of the diaphragm S1, the image plane illumination of the imaging plane of the vehicle-mounted lens is greatly enhanced.
On this basis, the vehicle-mounted lens provided by the application realizes the balance of resolution, image plane illumination and lens miniaturization of the large-aperture vehicle-mounted lens under the vignetting-free condition by combining the front group lens and the rear group lens with physical and chemical architecture design, and greatly improves the accuracy and the safety level of intelligent driving assisting information acquisition.
In the application, the first group has the main function of expanding the angle of view, the second group has the main function of correcting all levels of aberration, and the diaphragm is used for controlling the size of the light entering quantity, can adjust the illuminance of the image plane and can balance and adjust the aberration and the illuminance to a certain extent.
Since the first group mainly functions to collect light with a large field of view, the incident light has a larger incident angle on the first lens, the longer the light path the light passes before reaching the diaphragm, the larger the size of the first group will be, especially the first lens, so in order to control the size of the first lens, the closer the diaphragm is to the first lens, the better, but in order to ensure the size of the second group, the best choice is placed between the second lens and the third lens, and the sizes of the first lens and the second group can be ensured to reach the theoretical minimum simultaneously through weighing.
For example, the first, fifth, sixth, and eighth lenses P1, P5, P6, and P8 may have negative optical power, respectively, and the second, third, fourth, and seventh lenses P2, P3, P4, and P7 may have positive optical power, respectively.
In the application, the focal power from the first lens P1 to the eighth lens P8 is sequentially negative, positive, negative, positive and negative, and the effective correction of aberration can be realized while the resolution and the image surface illuminance are ensured by the collocation of the focal power.
In the application, the vehicle-mounted lens and each lens in the vehicle-mounted lens respectively meet corresponding focal length constraint. For example, the focal length f of the in-vehicle lens and the focal length f1 of the first lens P1 satisfy-1.431 < f 1 The constraint relation of/f < -1.347, and the focal length f of the vehicle-mounted lens and the focal length f2 of the second lens P2 meet 2.736 < f 2 The constraint relation of/f < 2.889, and the focal length f of the vehicle-mounted lens and the focal length f3 of the third lens P3 satisfy the constraint relation of 2.375 < f 3 Constraint relation of/f < 2.527, and focal length f of vehicle-mounted lens and focal length f4 of fourth lens P4 satisfy 3.083 < f 4 The constraint relation of/f < 3.208, and the focal length f of the vehicle-mounted lens and the focal length f5 of the fifth lens P5 satisfy-3.792 < f 5 The constraint relation of/f < -3.653, and the focal length f of the vehicle-mounted lens and the focal length f6 of the sixth lens P6 satisfy the constraint relation of-152.77 < f 6 The constraint relation of/f < -138.88, and the focal length f of the vehicle-mounted lens and the focal length f7 of the seventh lens P7 satisfy the condition that 1 < f 7 The constraint relation of/f < 1.167, and the focal length f of the vehicle-mounted lens and the focal length f8 of the eighth lens P8 satisfy-1.5 < f 8 Constraint relation of/f < -1.319. Based on the constraint relation to the focal length, the vehicle-mounted lens can realize focusing on the premise of ensuring mutual balance among resolution, image plane illumination and lens miniaturization, and the functional stability is ensured.
In addition, in order to meet the requirements of the first group, the second group and the diaphragm on aberration correction and field expansion at the same time, a certain number of relations need to be met between the three groups. Specifically, the first lens P1, the second lens P2, the stop S1, the third lens P3, the fourth lens P4, the fifth lens P5, the sixth lens P6, the seventh lens P7, and the eighth lens P8 satisfy the following constraint conditions:
-6.028＜f 12 /f＜-5.542。
1.194＜f 38 /f＜1.778。
0.05＜d1s/D stop ＜0.15。
0.08＜d2s/D stop ＜0.2。
wherein f 12 Is the equivalent focal length from the first lens P1 (exemplified by the surface of the first lens P1 near the object side) to the second lens P2 (exemplified by the surface of the second lens P2 near the image side), f 38 D is the equivalent focal length from the third lens P3 (exemplified by the surface of the third lens P3 near the object side) to the eighth lens P8 (exemplified by the surface of the eighth lens P8 near the image side) 1s Is the air gap, d, between the second lens P2 and the diaphragm S1 2s Is the air gap between the third lens P3 and the diaphragm S1.
For example, the focal length of the vehicle-mounted lens and the image plane height of the vehicle-mounted lens satisfy H which is more than or equal to 0.618 img Constraint relation of/f.ltoreq.0.674. Wherein f is the focal length of the vehicle lens, H img Based on the constraint relation, the vehicle-mounted lens can be provided with a proper angle of view for the image plane height of the vehicle-mounted lens.
For example, in order to meet the demand for miniaturization of the in-vehicle lens, the in-vehicle lens needs to be as small in length as possible. On the basis, H is more than or equal to 0.116% for the length of the vehicle-mounted lens img The constraint relation of/TTL is less than or equal to 0.133, so that the image quality and the image plane illumination can be improved to the greatest extent on the premise that the lens length is required to be as small as possible. Wherein H is img The TTL is the lens length of the vehicle-mounted lens.
For example, the constraint relation between the lens length of the vehicle-mounted lens and the back focal length of the vehicle-mounted lens is 0.026-0.029. And a certain space is reserved for the back focus while the total length of the lens is limited, so that the lens is convenient to match with other elements, and the requirement of structural design is met. Wherein TTL is the lens length of the vehicle lens, and BFL is the back focal length of the vehicle lens.
For example, the in-vehicle lens may also be provided with a flat glass G1. For example, the plate glass G1 is disposed between the second lens P2 and the diaphragm S1, and is bonded to the diaphragm S1. At this time, the sheet glass G1 is located closer to the object side.
By way of example, the flat glass G1, the first lens P1, the second lens P2, and the third lens P3 satisfy the following constraint relationship:
0.101≤d 12 /TTL≤0.116，
0.0175≤d 2c /TTL≤0.02，
0.025≤d 3c /TTL≤0.029，
wherein d 12 D is the distance between the first lens P1 and the second lens P2 2c D is the distance between the second lens P2 and the plate glass G1 3c The TTL is the length of the vehicle lens, which is the distance between the third lens P3 and the plate glass G1.
In the present application, for d 12 The pitch is controlled by controlling the effective aperture size of the first lens P1, and d 2c And d 3c The control of the aperture S1 is to meet the requirement of miniaturization of the vehicle-mounted lens.
In this application, the in-vehicle lens may also be provided with the filter F1. For example, the filter F1 is disposed between the image side and the eighth lens P8. The optical filter F1 may be an infrared optical filter, so as to provide a better imaging effect for the vehicle in actual driving scenarios such as ranging of the vehicle. For example, in a night driving scenario, clear imaging is provided for the on-board lens.
Correspondingly, fig. 2 is a schematic diagram of another vehicle-mounted lens provided by an exemplary embodiment of the present application. As shown in fig. 2, from left to right, the first lens P1, the second lens P2, the plate glass G1 (for example, the diaphragm S1 is bonded to the plate glass), the third lens P3, the fourth lens P4, the fifth lens P5, the sixth lens P6, the seventh lens P7, the eighth lens P8, the filter F1, and the image plane are respectively.
The vehicle-mounted lens can reach better resolution under the requirements of overall miniaturization and higher image surface illumination (no vignetting) of the lens, and the f-number (FNo) of the lens is about 1.0. Meanwhile, the ultra-large caliber design of the vehicle-mounted lens is realized. For ease of illustration, the following is an example of an on-board lens provided based on the constraints in the above embodiments.
By way of example, as example 1, parameters of respective lenses of the in-vehicle lens are shown in tables 1 and 2 below.
TABLE 1
TABLE 2
In table 1, the surface numbers are the corresponding numbers of the respective surfaces, for example, 0 is an object plane, 1 and 2 respectively represent the front surface and the rear surface of the first lens P1 (in this embodiment, the front surface refers to the surface of the lens close to the object side, and the rear surface refers to the surface of the lens close to the image side), and 3 and 4 are the front surface and the rear surface of the second lens, and so on. It should be emphasized that 5 is the surface of the char plate glass, STOP is the STOP surface, 19, 20 is the front and rear surfaces of the filter, and 21 is the image plane.
In Table 2, A2-A16 refer to the higher order aspheric coefficients in the even order aspheric equation, satisfyFor determining the sagittal height z of the lens surface. Wherein c is the inverse of the curvature radius, k is the quadric surface coefficient, and r is the aperture size of the lens. Wherein, c, k, and r can be directly referenced to the lens parameters in Table 1, such as the quadric coefficient of surface number 1 is-0.048447962, and correspondingly r is-0.048447962.
Based on the above lens parameters, the relevant performance of the in-vehicle lens is shown in fig. 3 to 5. Fig. 3 is a schematic diagram of a lens image quality modulation transfer function (Modulation Transfer Function, MTF) of the vehicle lens, fig. 4 is a spot speckle pattern of the vehicle lens in different fields of view, and fig. 5 is a schematic diagram of image plane relative illuminance of the vehicle lens. As shown in fig. 4, the point column diagram is a point column diagram of an Image (IMA) on an imaging plane, and numerals marked after IMA represent the field of view height. In "IMA:4.800mm "for example, refers to a spot diagram at a field of view height of 4.800mm on the imaging surface. Based on fig. 3 to 5, the vehicle lens achieves better levels in the illuminance, resolution and overall lens size of the image plane, the total focal length of the vehicle lens is 7.204mm, the f-number (Fno) is 1.03, the Total Length (TTL) is 35.9mm, and the half height (H) img ) 4.8mm.
By way of example, as example 2, parameters of each lens of the in-vehicle lens are shown in tables 3 and 4 below.
TABLE 3 Table 3
TABLE 4 Table 4
In table 3, the surface numbers are the corresponding numbers of the respective surfaces, for example, 0 is an object plane, 1 and 2 respectively represent the front surface and the rear surface of the first lens P1 (in this embodiment, the front surface refers to the surface of the lens close to the object side, and the rear surface refers to the surface of the lens close to the image side), and 3 and 4 are the front surface and the rear surface of the second lens, and so on. It should be emphasized that 5 is the surface of the char plate glass, STOP is the STOP surface, 19, 20 is the front and rear surfaces of the filter, and 21 is the image plane.
In Table 4, A2-A16 refer to the higher order aspheric coefficients in the even order aspheric equation, satisfyFor determining the sagittal height z of the lens surface. Where c is the inverse radius of curvature, k is the quadric coefficient, and r is the lens caliber dimension, where c, k, and r can be directly referenced to the lens parameters in Table 3, such as the quadric coefficient for surface number 1 of 3.303848721, and correspondingly r of 3.303848721.
Based on the above lens parameters, the relevant performance of the in-vehicle lens is shown in fig. 6 to 8. Fig. 6 is a schematic diagram of a lens image quality modulation transfer function of the vehicle lens, fig. 7 is a spot speckle pattern of the vehicle lens in different fields of view, and fig. 8 is a schematic diagram of image plane relative illuminance of the vehicle lens. As shown in fig. 7, the point column diagram is a point column diagram of an Image (IMA) on an imaging plane, and numerals marked after IMA represent the field of view height. In "IMA:4.800mm "for example, refers to a spot diagram at a field of view height of 4.800mm on the imaging surface. As can be seen from fig. 6 to 8, the vehicle mirror is mounted at this timeThe illuminance, the resolution and the overall size of the lens of the head on the image surface reach better levels, the total focal length of the vehicle-mounted lens is 7.274mm, the f-number (FNo) is 1.04, the Total Length (TTL) is 36.9mm, and the half height (H) img ) 4.8mm.
By way of example, the parameters of each lens of the in-vehicle lens in example 3 are shown in tables 5 and 6 below.
TABLE 5
TABLE 6
In table 5, the surface numbers are the corresponding numbers of the respective surfaces, for example, 0 is an object plane, 1 and 2 respectively represent the front surface and the rear surface of the first lens P1 (in this embodiment, the front surface refers to the surface of the lens close to the object side, and the rear surface refers to the surface of the lens close to the image side), and 3 and 4 are the front surface and the rear surface of the second lens, and so on. It should be emphasized that 5 is the surface of the char plate glass, STOP is the STOP surface, 19, 20 is the front and rear surfaces of the filter, and 21 is the image plane.
In Table 6, A2-A16 refer to the higher order aspheric coefficients in the even order aspheric equation, satisfyFor determining the sagittal height z of the lens surface. Where c is the inverse radius of curvature, k is the quadric coefficient, and r is the lens caliber dimension, where c, k, and r can be directly referenced to the lens parameters in Table 3, such as the quadric coefficient for surface number 1 of 11.15646891, and correspondingly r of 11.15646891.
Based on the above lens parameters, the relevant performance of the in-vehicle lens is shown in fig. 9 to 11. Fig. 9 is a schematic diagram of a lens image quality modulation transfer function of a vehicle lens, fig. 10 is a spot speckle pattern of the vehicle lens in different fields of view, and fig. 11 is an image plane relative view of the vehicle lensSchematic diagram of the degree. As shown in fig. 10, the point column diagram is a point column diagram of an Image (IMA) on an imaging plane, and numerals marked after IMA indicate the field of view height. In "IMA:4.800mm "for example, refers to a spot diagram at a field of view height of 4.800mm on the imaging surface. Based on fig. 9 to 11, the vehicle lens achieves better levels in the illuminance, resolution and overall lens size of the image plane, the total focal length of the vehicle lens is 7.188mm, the f-number (Fno) is 1.11, the Total Length (TTL) is 33.46mm, and the half height (H) of the image plane img ) 4.8mm.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.
The methods and apparatus of the present application can be accomplished with standard programming techniques with rule-based logic or other logic to accomplish the various method steps. It should also be noted that the words "apparatus" and "module" as used herein and in the claims are intended to include implementations using one or more lines of software code and/or hardware implementations and/or equipment for receiving inputs.
Any of the steps, operations, or procedures described herein may be performed or implemented using one or more hardware or software modules alone or in combination with other devices. In one embodiment, the software modules are implemented using a computer program product comprising a computer readable medium containing computer program code capable of being executed by a computer processor for performing any or all of the described steps, operations, or programs.
The foregoing description of implementations of the present application has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the application. The embodiments were chosen and described in order to explain the principles of the present application and its practical application to enable one skilled in the art to utilize the present application in various embodiments and with various modifications as are suited to the particular use contemplated.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
It will be further understood that "connected" includes both direct connection where no other member is present and indirect connection where other element is present, unless specifically stated otherwise.
It will further be appreciated that although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the scope of the appended claims.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. A vehicle-mounted lens is characterized in that,
the lens system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object side to an image side, wherein the first lens and the second lens form a first group, the third lens to the eighth lens form a second group, and a diaphragm is arranged between the second lens and the third 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 glass lenses, respectively, and the eighth lens is a plastic lens; the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are aspherical lenses, respectively;
the aperture size of the diaphragm and the focal length of the vehicle-mounted lens meet the following constraint relation:
0.96≤f / D stop ≤1.1；
wherein f is the focal length of the vehicle-mounted lens, D stop The aperture size of the diaphragm; and, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens satisfy the following constraint relation with the in-vehicle lens:
-1.431＜f 1 /f＜-1.347；
2.736＜f 2 /f＜2.889；
2.375＜f 3 /f＜2.527；
3.083＜f 4 /f＜3.208；
-3.792＜f 5 /f＜-3.653；
-152.77＜f 6 /f＜-138.88；
1＜f 7 /f＜1.167；
-1.5＜f 8 /f＜-1.319；
wherein f is the focal length of the vehicle-mounted lens, f 1 F is the focal length of the first lens 2 F is the focal length of the second lens 3 F is the focal length of the third lens 4 F is the focal length of the fourth lens 5 F is the focal length of the fifth lens 6 F is the focal length of the sixth lens 7 F is the focal length of the seventh lens 8 Is the focal length of the eighth lens.
2. The in-vehicle lens according to claim 1, wherein the first lens, the second lens, the stop, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens satisfy the following constraint conditions:
-6.028＜f 12 /f＜-5.542；
1.194＜f 38 /f＜1.778；
0.05＜d 1s /D stop ＜0.15；
0.08＜d 2s /D stop ＜0.2；
wherein f 12 F is the equivalent focal length from the first lens to the second lens 38 D is the equivalent focal length from the third lens to the eighth lens 1s D is the air gap between the second lens and the diaphragm 2s Is an air gap between the third lens and the diaphragm.
3. The in-vehicle lens according to claim 1, wherein a following constraint relationship is satisfied between a focal length of the in-vehicle lens and an image plane height of the in-vehicle lens:
0.618≤H img / f≤0.674；
wherein f is the focal length of the vehicle-mounted lens, H img The image plane height of the vehicle-mounted lens is the image plane height of the vehicle-mounted lens.
4. The vehicle lens according to claim 1, wherein a lens length of the vehicle lens and an image plane height of the vehicle lens satisfy the following constraint relation:
0.116≤H img / TTL≤0.133；
wherein H is img And TTL is the lens length of the vehicle-mounted lens for the image plane height of the vehicle-mounted lens.
5. The in-vehicle lens according to claim 1, wherein a lens length of the in-vehicle lens and a back focal length of the in-vehicle lens satisfy the following constraint relation:
0.026≤BFL/TTL≤0.029；
wherein TTL is the lens length of the vehicle-mounted lens, and BFL is the back focal length of the vehicle-mounted lens.
6. The in-vehicle lens according to claim 1, wherein the in-vehicle lens is further provided with a flat glass;
the plate glass is arranged between the second lens and the diaphragm and is attached to the diaphragm.
7. The vehicle lens according to claim 6, wherein the flat glass, the first lens, the second lens, and the third lens satisfy the following constraint relation:
0.101≤d 12 /TTL≤0.116；
0.0175≤d 2c /TTL≤0.02；
0.025≤d 3c /TTL≤0.029；
wherein d 12 For the first lens andthe distance d between the second lenses 2c D, the distance between the second lens and the flat glass 3c And TTL is the length of the vehicle-mounted lens for the distance between the third lens and the plate glass.
8. The in-vehicle lens according to claim 1, characterized in that the in-vehicle lens further comprises:
a filter disposed between the image side and the eighth lens;
the optical filter is an infrared optical filter.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215729053U (en) * | 2021-08-05 | 2022-02-01 | 东莞市宇瞳光学科技股份有限公司 | Fixed focus lens |
| CN114089510A (en) * | 2022-01-21 | 2022-02-25 | 江西联益光学有限公司 | Optical lens |
| CN114265186A (en) * | 2022-03-02 | 2022-04-01 | 江西联益光学有限公司 | Optical lens |
| CN115291372A (en) * | 2022-10-08 | 2022-11-04 | 江西联创电子有限公司 | Optical lens |
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| TWI792526B (en) * | 2021-08-30 | 2023-02-11 | 大陸商信泰光學（深圳）有限公司 | Wide-angle lens assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215729053U (en) * | 2021-08-05 | 2022-02-01 | 东莞市宇瞳光学科技股份有限公司 | Fixed focus lens |
| CN114089510A (en) * | 2022-01-21 | 2022-02-25 | 江西联益光学有限公司 | Optical lens |
| CN114265186A (en) * | 2022-03-02 | 2022-04-01 | 江西联益光学有限公司 | Optical lens |
| CN115291372A (en) * | 2022-10-08 | 2022-11-04 | 江西联创电子有限公司 | Optical lens |
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