CN109471242B - 3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof - Google Patents
3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof Download PDFInfo
- Publication number
- CN109471242B CN109471242B CN201811585849.4A CN201811585849A CN109471242B CN 109471242 B CN109471242 B CN 109471242B CN 201811585849 A CN201811585849 A CN 201811585849A CN 109471242 B CN109471242 B CN 109471242B
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- lens
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- biconvex
- meniscus negative
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- 238000003384 imaging method Methods 0.000 title claims description 7
- 230000005499 meniscus Effects 0.000 claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 abstract description 4
- 230000004075 alteration Effects 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000005331 crown glasses (windows) Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000005308 flint glass Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
-
- 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
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to a 3.9mm focal length streaming media intelligent rearview mirror, which is characterized in that: a front group A with negative focal power, a diaphragm C and a rear group B with positive focal power are sequentially arranged in the optical system of the lens along the direction of incidence of light rays from left to right, wherein the front group A comprises a meniscus negative lens A; the rear group B comprises a biconvex lens B-1 and biconcave lens B-2 compact gluing group, a meniscus positive lens B-3, a biconvex lens B-4 and a meniscus negative lens B-5 compact gluing group which are sequentially arranged, has the advantages of larger field angle, high resolution, compact optical structure, economical material price and the like, and can be matched with a CCD or CMOS with 200 ten thousand pixels and high resolution.
Description
Technical Field
The invention relates to a 3.9mm focal length streaming media intelligent rearview mirror and an imaging method thereof.
Background
Various wide-angle fixed-focus lenses are applied to vehicle systems in the early market, but the wide-angle fixed-focus lenses belong to low-end vehicle products because of the fact that aberration at edges and high-grade spherical aberration of many products are difficult to correct. At present, in the vehicle-mounted industry, a wide-angle fixed-focus lens with low cost and high image quality is truly fresh.
Disclosure of Invention
The invention aims at overcoming the defects, and provides a 3.9mm focal length streaming media intelligent rearview mirror with a simple structure and an imaging method thereof.
The technical scheme of the invention is that a 3.9mm focal length streaming media intelligent rearview mirror lens, wherein a front group A with negative focal power, a diaphragm C and a rear group B with positive focal power are sequentially arranged in an optical system of the lens along the incidence direction of light rays from left to right, and the front group A comprises a meniscus negative lens A; the rear group B comprises a biconvex lens B-1 and biconcave lens B-2 close gluing group, a meniscus positive lens B-3, a biconvex lens B-4 and a meniscus negative lens B-5 close gluing group which are sequentially arranged.
Further, the air space between the front group a and the rear group B is 2.16mm.
Further, the air interval between the tightly glued groups of the meniscus negative lens A and the biconvex lens B-1 and the biconcave lens B-2 is 2.16mm; the air interval between the biconvex lens B-1 and biconcave lens B-2 tightly glued group and the meniscus positive lens B-3 is 0.3mm; the air space between the meniscus positive lens B-3 and the biconvex lens B-4 and the meniscus negative lens B-5 tightly glued group is 0.1mm.
Further, a filter is arranged behind the biconvex lens B-4 and the meniscus negative lens B-5 close gluing group.
An imaging method of a 3.9mm focal length streaming media intelligent rearview lens is carried out according to the following steps: the light rays are imaged after passing through the meniscus negative lens A, the biconvex lens B-1, the biconcave lens B-2, the meniscus positive lens B-3, the biconvex lens B-4 and the meniscus negative lens B-5 in turn from left to right.
Compared with the prior art, the invention has the following beneficial effects: the CCD or CMOS display device has the advantages of larger field angle, high resolution, simple optical structure, economical material price and the like, and can be matched with a CCD or CMOS display device with 200 ten thousand pixels and high resolution.
Drawings
The patent of the invention is further described below with reference to the accompanying drawings.
Fig. 1 is a diagram of an optical system according to an embodiment of the present invention.
Fig. 2 is a mechanical block diagram of an embodiment of the present invention.
Fig. 3 is an MTF plot focused such that the visible center field of view image quality is optimal.
In the figure:
a meniscus negative lens A, B-1 biconvex lens B-1, B-2 biconcave lens B-2, B-3 meniscus positive lens B-3, B-4 biconvex lens B-4, B-5 meniscus negative lens B-5, 1-AB spacer.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1 to 3, a 3.9mm focal length streaming media intelligent rearview mirror is provided, in an optical system of the lens, with a front group a with negative focal power, a diaphragm C and a rear group B with positive focal power in sequence along a direction of incidence of light from left to right, wherein the front group a comprises a meniscus negative lens a; the rear group B comprises a biconvex lens B-1 and biconcave lens B-2 close gluing group, a meniscus positive lens B-3, a biconvex lens B-4 and a meniscus negative lens B-5 close gluing group which are sequentially arranged.
In this embodiment, the air gap between the front group a and the rear group B is 2.16mm.
In this embodiment, the air space between the meniscus negative lens A and the biconvex lens B-1 and biconcave lens B-2 close-gluing group is 2.16mm; the air interval between the biconvex lens B-1 and biconcave lens B-2 tightly glued group and the meniscus positive lens B-3 is 0.3mm; the air space between the meniscus positive lens B-3 and the biconvex lens B-4 and the meniscus negative lens B-5 tightly glued group is 0.1mm.
In this embodiment, a filter is disposed behind the double convex lens B-4 and the meniscus negative lens B-5 close-bonded group.
An imaging method of a 3.9mm focal length streaming media intelligent rearview lens is carried out according to the following steps: the light rays are imaged after passing through the meniscus negative lens A, the biconvex lens B-1, the biconcave lens B-2, the meniscus positive lens B-3, the biconvex lens B-4 and the meniscus negative lens B-5 in turn from left to right.
In this embodiment, the optical system composed of the lens groups described above achieves the following optical indexes:
focal length: f' =3.9 mm;
relative pore size f=1.9;
angle of view: 2w is more than or equal to 100 degrees (the image field of view 2 eta' is more than or equal to phi 6.6 mm);
TV distortion: -7.5%;
resolution ratio: can be matched with a 200 ten thousand-pixel high-resolution CCD or CMOS camera;
the total length sigma of the light path is less than or equal to 17.2mm, and the optical back intercept L' is more than or equal to 4.68mm;
the applicable spectral line range: 420 nm-700 nm.
As can be seen from the completed technical indexes, the total length of the optical path is short, so that the size of the lens is small; the back focus is moderate, and can be matched with a camera of a trigger interface for use; the light-transmitting aperture is large, the light inlet quantity is sufficient, and the light-transmitting aperture can be used in a dim environment; the front group of negative focal power and the rear group of positive focal power ensure that the lens can still be normally used in high and low temperature environments; the achromatism is realized by using flint glass with high refraction and high dispersion and crown glass with high refractive index and low dispersion; the lens used in the invention is global, the R value is moderate, the lens assembly difficulty is reduced, low-price glass is used, the processing and material cost is reduced, and the optical sensitivity of the lens is reduced.
In this embodiment, the parameters of each lens are shown in the following table one:
in the embodiment, an AB spacer ring is arranged between the meniscus negative lens A and the biconvex lens B-1, and the mechanical part has the main functions of ensuring the air interval between the meniscus negative lens A and the biconvex lens B-1 and the assembly of the optical axis of the meniscus negative lens A and the biconvex lens B-1, meanwhile, the invalid light rays are intercepted and absorbed, and the stray light problem of the lens can be effectively solved by adopting an extinction grain design in the AB spacer ring.
In this embodiment, as can be seen from fig. 3, the center field of view 120 line pair is greater than 0.5,0.7 and the field of view 120 line pair is greater than 0.45.
The lens has the market advantages in the vehicle-mounted field, the front group of negative focal power corrects 3-order aberration and 5-order spherical aberration, the rear group of bonding sheets mainly corrects chromatic aberration and astigmatism by using flint glass with high refractive index and high dispersion and crown glass with high refractive index and low dispersion, the focal power is reasonably distributed to reduce incidence angles of all sides, the high-definition shooting level is achieved with lower sensitivity, and when the optical design is carried out, the glass material of the lens is reasonably selected, so that the aberration of the lens in the wavelength range of 420-700 nm is reasonably corrected and balanced.
While the foregoing is directed to the preferred embodiment, other and further embodiments of the invention will be apparent to those skilled in the art from the following description, wherein the invention is described, by way of illustration and example only, and it is intended that the invention not be limited to the specific embodiments illustrated and described, but that the invention is to be limited to the specific embodiments illustrated and described.
Claims (2)
1. A3.9 mm focal length streaming media intelligent rearview mirror is characterized in that: the optical system of the lens sequentially comprises a front group A with negative focal power, a diaphragm C and a rear group B with positive focal power along the incidence direction of light rays from left to right, wherein the front group A consists of a meniscus negative lens A; the rear group B consists of a biconvex lens B-1 and biconcave lens B-2 close gluing group, a meniscus positive lens B-3, a biconvex lens B-4 and a meniscus negative lens B-5 close gluing group which are sequentially arranged; the air space between the front group A and the rear group B is 2.16mm; the air interval between the meniscus negative lens A and the biconvex lens B-1 and the biconcave lens B-2 tightly glued group is 2.16mm; the air interval between the biconvex lens B-1 and biconcave lens B-2 tightly glued group and the meniscus positive lens B-3 is 0.3mm; the air interval between the meniscus positive lens B-3 and the biconvex lens B-4 and the meniscus negative lens B-5 tightly glued group is 0.1mm; and an optical filter is arranged behind the biconvex lens B-4 and the meniscus negative lens B-5 close gluing group.
2. The imaging method of the 3.9mm focal length streaming media intelligent rearview lens according to claim 1, which is characterized by comprising the following steps: the light rays are imaged after passing through the meniscus negative lens A, the biconvex lens B-1, the biconcave lens B-2, the meniscus positive lens B-3, the biconvex lens B-4 and the meniscus negative lens B-5 in turn from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811585849.4A CN109471242B (en) | 2018-12-25 | 2018-12-25 | 3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811585849.4A CN109471242B (en) | 2018-12-25 | 2018-12-25 | 3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109471242A CN109471242A (en) | 2019-03-15 |
| CN109471242B true CN109471242B (en) | 2024-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811585849.4A Active CN109471242B (en) | 2018-12-25 | 2018-12-25 | 3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014013296A (en) * | 2012-07-04 | 2014-01-23 | Nikon Corp | Optical system, imaging device including the same, and method for manufacturing the same |
| CN203422519U (en) * | 2013-08-15 | 2014-02-05 | 福建福光数码科技有限公司 | Ultra-wide-angle 2.8 primary lens |
| CN105445906A (en) * | 2015-12-24 | 2016-03-30 | 福建福光股份有限公司 | 4mm-focal length wide-angle high-light transmission day-and-night confocal lens |
| CN107991762A (en) * | 2017-12-12 | 2018-05-04 | 福建福光股份有限公司 | A kind of 1.3mm focal lengths panorama day and night confocal high definition camera lens |
| CN108873278A (en) * | 2018-09-06 | 2018-11-23 | 福建福光股份有限公司 | High definition continuous magnification lens and its focus adjustment method with active temperature focusing function |
| CN209343020U (en) * | 2018-12-25 | 2019-09-03 | 福建福光天瞳光学有限公司 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens |
-
2018
- 2018-12-25 CN CN201811585849.4A patent/CN109471242B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014013296A (en) * | 2012-07-04 | 2014-01-23 | Nikon Corp | Optical system, imaging device including the same, and method for manufacturing the same |
| CN203422519U (en) * | 2013-08-15 | 2014-02-05 | 福建福光数码科技有限公司 | Ultra-wide-angle 2.8 primary lens |
| CN105445906A (en) * | 2015-12-24 | 2016-03-30 | 福建福光股份有限公司 | 4mm-focal length wide-angle high-light transmission day-and-night confocal lens |
| CN107991762A (en) * | 2017-12-12 | 2018-05-04 | 福建福光股份有限公司 | A kind of 1.3mm focal lengths panorama day and night confocal high definition camera lens |
| CN108873278A (en) * | 2018-09-06 | 2018-11-23 | 福建福光股份有限公司 | High definition continuous magnification lens and its focus adjustment method with active temperature focusing function |
| CN209343020U (en) * | 2018-12-25 | 2019-09-03 | 福建福光天瞳光学有限公司 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens |
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| CN109471242A (en) | 2019-03-15 |
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