CN116577905A - High-definition vehicle-mounted lens - Google Patents
High-definition vehicle-mounted lens Download PDFInfo
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- CN116577905A CN116577905A CN202310467118.4A CN202310467118A CN116577905A CN 116577905 A CN116577905 A CN 116577905A CN 202310467118 A CN202310467118 A CN 202310467118A CN 116577905 A CN116577905 A CN 116577905A
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- lens
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- optical power
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- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 230000005499 meniscus Effects 0.000 claims description 7
- 230000004075 alteration Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012634 optical imaging 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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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 invention discloses a high-definition vehicle-mounted lens, which sequentially comprises a front lens group with positive focal power, an aperture diaphragm, a rear lens group with positive focal power and an optical filter from an object side to an image side, wherein the front lens group comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with positive focal power, the rear lens group comprises a fifth lens with positive focal power, a sixth lens with positive focal power, a seventh lens with negative focal power and an eighth lens with positive focal power, and the sixth lens and the seventh lens form a cemented lens group. The resolution of the lens can reach eight million pixels, the MTF is higher than 35% at 238lp/mm, the image plane size is about phi 9mm, the precise early warning can be carried out on the obstacle appearing in front of the automobile running at high speed, and the lens is suitable for various vehicle-mounted camera systems.
Description
Technical Field
The invention relates to optical imaging equipment, in particular to a high-definition vehicle-mounted lens.
Background
Advanced Driver Assistance Systems (ADASs) have the characteristics of ensuring safety, improving efficiency, relieving driving pressure and the like, and are the development direction of automobiles in the future. With the continuous development of artificial intelligence, the national overall planning and infrastructure of the intelligent driving field are continuously perfected, and the future intelligent driving technology becomes the standard of automobiles, which makes an important contribution to the development of driving modes and traffic systems. The vehicle-mounted camera is used as an important ring in intelligent auxiliary driving, can assist a driver to timely find possible dangers of the automobile in the driving process, makes reasonable driving actions, and plays an important role in ensuring driving safety.
At present, the resolution of a common vehicle-mounted lens on the market is mostly below three megapixels, and the lens can meet the requirements of daily driving, but has poor recognition capability on large-scale and small obstacles, and cannot accurately early warn the obstacles appearing in front of a vehicle running at a high speed. The high-definition and wide-field lens can accurately distinguish objects, so that accurate and reliable evidence is provided for analysis and judgment of traffic accidents.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-definition vehicle-mounted lens, which is an eight-megapixel high-definition vehicle-mounted lens with a horizontal view angle of 120 degrees and is used for clearly distinguishing long-distance details, so that the defect that an intelligent automobile is insufficient in identifying long-distance and large-range tiny obstacles is overcome, the early warning capability of the intelligent automobile is improved, and the driving safety of a driver is better assisted.
In order to solve the technical problems, the invention adopts the following technical scheme: the high-definition vehicle-mounted lens sequentially comprises a front lens group with positive focal power, an aperture diaphragm, a rear lens group with positive focal power and an optical filter from an object side to an image side; the front lens group includes a first lens having negative optical power, a second lens having negative optical power, a third lens having positive optical power, and a fourth lens having positive optical power; the rear lens group includes a fifth lens having positive optical power, a sixth lens having positive optical power, a seventh lens having negative optical power, and an eighth lens having positive optical power; the sixth lens and the seventh lens form a cemented lens, the diaphragm is positioned between the front lens group and the rear lens group, and the optical filter is positioned between the rear lens group and the image plane.
The first lens is a meniscus lens, the second lens is a biconcave lens, the third lens is a biconvex lens, the fourth lens is a meniscus lens, the fifth lens is a biconvex lens, the sixth lens is a biconvex lens, the seventh lens is a biconcave lens, and the eighth lens is a biconvex lens.
The cemented lens formed by the sixth lens and the seventh lens is a cemented lens with positive optical power.
The parameters of each lens are as follows:
。
the distance D1 from the vertex of the rear surface of the first lens to the vertex of the front surface of the second lens is 4.4-4.5 mm; the distance D2 from the vertex of the rear surface of the second lens to the vertex of the front surface of the third lens is 2.3-2.4 mm; the distance D3 from the vertex of the rear surface of the third lens to the vertex of the front surface of the fourth lens is 0.1-0.3 mm; the distance D4 from the vertex of the rear surface of the fifth lens to the vertex of the front surface of the cemented lens is 0-0.1 mm; the distance D5 from the vertex of the rear surface of the cemented lens to the vertex of the front surface of the eighth lens is 3.5-3.6 mm.
Further, the D1 is 4.43mm, the D2 is 2.36mm, the D3 is 0.2mm, the D4 is 0.05mm, and the D5 is 3.55mm.
Compared with the prior art, the high-definition vehicle-mounted lens designed by the technical scheme has high resolution, which can reach eight million pixels, the MTF at 238lp/mm is higher than 35%, the size of the image plane is about phi 9mm, and the requirements of the high-definition resolution and wide-field lens are met. The vehicle-mounted camera system can accurately early warn obstacles in front of a vehicle running at a high speed, and is very suitable for various vehicle-mounted camera systems.
Drawings
FIG. 1 is a schematic view showing the structure of a high-definition onboard lens optical system according to the present invention;
fig. 2 shows a schematic diagram of the MTF (modulation transfer function) of the present invention.
Description of the embodiments
The invention relates to a high-definition vehicle-mounted lens, which is specifically described below with reference to the accompanying drawings.
The invention relates to a high-definition vehicle-mounted lens, which is shown in fig. 1 and 2, and sequentially comprises a front lens group A01 with positive focal power and a rear lens group A02 with positive focal power from the object side to the image side, wherein a diaphragm STOP is positioned between the front lens group A01 and the rear lens group A02, and a light filter is positioned between the rear lens group A02 and the image side.
The front lens group a01 of the present invention includes a first lens G1 having negative optical power, a second lens G2 having negative optical power, a third lens G3 having positive optical power, and a fourth lens G4 having positive optical power. The first lens G1 is a meniscus lens with negative focal power, and is designed to collect light with a large field of view as much as possible to enter the rear system, so as to avoid excessive divergence of the object light, and facilitate control of the aperture of the rear lens. The second lens G2 is a biconcave lens with negative power, and the third lens G3 is a biconvex lens with positive power. The fourth lens G4 is a meniscus lens with positive focal power, and the fourth lens G4 is arranged as the meniscus lens, so that light rays are converged and smoothly transited to the rear lens, and the effective focal length of the fourth lens G4 is controlled, so that the light ray trend from the first lens G1 to the fourth lens G4 can be controlled, and the system structure is more compact.
The rear lens group a02 of the present invention includes a fifth lens G5 having positive optical power, a sixth lens G6 having positive optical power, a seventh lens G7 having negative optical power, and an eighth lens G8 having positive optical power. The fifth lens G5 is a biconvex lens of positive power. The eighth lens G8 is a biconvex lens with positive focal power, and can effectively control the angle of the main light ray of the system, so that the light ray and the chip are more matched.
The sixth lens G6 and the seventh lens G7 form the cemented lens group B01, and the combined arrangement of the cemented lens group B01 can be used for reducing chromatic aberration or eliminating chromatic aberration to the greatest extent, and can obviously improve the image quality, thereby improving the definition of lens imaging.
The STOP of the present invention is located between the front lens group a01 and the rear lens group a02, and the optical filter is located between the rear lens group a02 and the image plane. The aperture can effectively retract the light entering the optical system, and reduce the caliber of the lens so as to further improve the imaging quality of the lens.
The parameters of each lens of the invention are as follows:
。
the distance D1 from the vertex of the rear surface of the first lens G1 of the front lens group a01 to the vertex of the front surface of the second lens G2 of the front lens group a01 of the present invention is 4.4 to 4.5mm, preferably 4.43mm. The distance D2 from the vertex of the rear surface of the second lens G2 of the front lens group a01 to the vertex of the front surface of the third lens G3 of the front lens group a01 is 2.3 to 2.4mm, preferably 2.36mm. The distance D3 from the vertex of the rear surface of the third lens G3 of the front lens group a01 to the vertex of the front surface of the fourth lens G4 of the front lens group a01 is 0.1 to 0.3mm, preferably 0.2mm. The distance D4 from the vertex of the rear surface of the fifth lens G5 of the rear lens group a02 to the vertex of the front surface of the cemented lens B01 of the rear lens group a02 is 0 to 0.1mm, preferably 0.05mm. The distance D5 from the rear surface vertex of the cemented lens B01 of the rear lens group a02 to the front surface vertex of the eighth lens G8 of the rear lens group a02 is 3.5 to 3.6mm, preferably 3.55mm.
The system has the overall length of 33mm, the whole structure is small and compact, the vibration-proof effect is good, and the system is very suitable for various vehicle-mounted camera systems. FIG. 2 is a graph of normal temperature (25 ℃) MTF (modulation transfer function), in which the abscissa indicates spatial frequency in units: line pair/millimeter (lp/mm), and ordinate indicates MTF value. As can be seen from the figure, the MTF of this example is as high as about 35% at 238lp/mm for all field of view MTF values, indicating that a high definition image can be obtained over the entire image plane.
Claims (6)
1. A high-definition vehicle-mounted lens is characterized by sequentially comprising a front lens group with positive focal power, an aperture diaphragm, a rear lens group with positive focal power and an optical filter from an object side to an image side; the front lens group includes a first lens having negative optical power, a second lens having negative optical power, a third lens having positive optical power, and a fourth lens having positive optical power; the rear lens group includes a fifth lens having positive optical power, a sixth lens having positive optical power, a seventh lens having negative optical power, and an eighth lens having positive optical power; the sixth lens and the seventh lens form a cemented lens, and the optical filter is positioned between the rear lens group and the image plane.
2. The high-definition vehicle-mounted lens as claimed in claim 1, wherein the first lens is a meniscus lens, the second lens is a biconcave lens, the third lens is a biconvex lens, the fourth lens is a meniscus lens, the fifth lens is a biconvex lens, the sixth lens is a biconvex lens, the seventh lens is a biconcave lens, and the eighth lens is a biconvex lens.
3. The high-definition vehicle-mounted lens as claimed in claim 1, wherein the cemented lens composed of the sixth lens and the seventh lens is a cemented lens having positive optical power.
4. A high definition vehicle lens according to claim 1 or 2, wherein a distance D1 from a vertex of a rear surface of the first lens to a vertex of a front surface of the second lens is 4.4-4.5 mm; the distance D2 from the vertex of the rear surface of the second lens to the vertex of the front surface of the third lens is 2.3-2.4 mm; the distance D3 from the vertex of the rear surface of the third lens to the vertex of the front surface of the fourth lens is 0.1-0.3 mm; the distance D4 from the vertex of the rear surface of the fifth lens to the vertex of the front surface of the cemented lens is 0-0.1 mm; the distance D5 from the vertex of the rear surface of the cemented lens to the vertex of the front surface of the eighth lens is 3.5-3.6 mm.
5. The high-definition vehicle-mounted lens as claimed in claim 4, wherein D1 is 4.43mm, D2 is 2.36mm, D3 is 0.2mm, D4 is 0.05mm, and D5 is 3.55mm.
6. The high-definition vehicle-mounted lens according to claim 1 or 2, wherein the parameters of each lens are as follows:
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310467118.4A CN116577905A (en) | 2023-04-27 | 2023-04-27 | High-definition vehicle-mounted lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310467118.4A CN116577905A (en) | 2023-04-27 | 2023-04-27 | High-definition vehicle-mounted lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116577905A true CN116577905A (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310467118.4A Pending CN116577905A (en) | 2023-04-27 | 2023-04-27 | High-definition vehicle-mounted lens |
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| Country | Link |
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| CN (1) | CN116577905A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117471656A (en) * | 2023-12-27 | 2024-01-30 | 江西联创电子有限公司 | Optical lens |
-
2023
- 2023-04-27 CN CN202310467118.4A patent/CN116577905A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117471656A (en) * | 2023-12-27 | 2024-01-30 | 江西联创电子有限公司 | Optical lens |
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