CN115268020B - Large-aperture high-definition athermalized traffic lens and imaging method thereof - Google Patents
Large-aperture high-definition athermalized traffic lens and imaging method thereof Download PDFInfo
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- CN115268020B CN115268020B CN202210839465.0A CN202210839465A CN115268020B CN 115268020 B CN115268020 B CN 115268020B CN 202210839465 A CN202210839465 A CN 202210839465A CN 115268020 B CN115268020 B CN 115268020B
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- 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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- 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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Abstract
The invention relates to a large aperture high definition athermalized traffic lens, which comprises a front group A, a diaphragm C, a rear group B and a flat optical filter which are sequentially arranged along a left object plane to a right image plane, wherein the front group A comprises a meniscus lens A1, a meniscus lens A2, a meniscus lens A3, a front group bonding sheet, a biconvex lens A6 and a biconvex lens A7 which are sequentially arranged from left to right, the rear group B comprises a first rear group bonding sheet, a second rear group bonding sheet and a biconvex lens B5 which are sequentially arranged from left to right, the front group bonding sheet comprises a meniscus lens A4 and a meniscus lens A5, the first rear group bonding sheet comprises a biconvex lens B1 and a biconcave lens B2, and the second rear group bonding sheet comprises a biconvex lens B3 and a meniscus lens B4. The invention has simple structure and reasonable design, adopts twelve glass spherical lens combinations, improves the on-axis and off-axis aberration of the large aperture by restraining the incidence angle of the object image side beam, improves the resolution of the lens by material collocation and aberration control, and enables the lens to be used with a high-pixel camera.
Description
Technical Field
The invention relates to a large aperture high definition athermalized traffic lens and an imaging method thereof.
Background
Along with the continuous promotion of the urban process and the improvement of the industrial level in China, the number of traffic automobiles is continuously increased, the phenomenon of traffic jam frequently occurs, and meanwhile, the noise, the air pollution and the traffic accidents caused by the traffic jam are endless, so that the trip safety and the social resource operation efficiency of people face serious challenges, and the urban process in China is a difficult problem which must be overcome. The intelligent traffic technology integrates information technology, communication technology, sensing technology and the like, and achieves the most efficient road traffic optimization through information exchange and processing.
With the rapid development of the 5G technology, the construction of the public travel information service system is brought to a new step, higher requirements are put forward on new-generation intelligent traffic equipment, an intelligent traffic lens is used as one of the most critical hardware of the intelligent traffic equipment and is used as the first gateway of information transmission, the environmental stability and the resolution are particularly critical, and the running efficiency and the judgment accuracy of the whole information system are directly determined. Most large aperture intelligent traffic lenses in the market still have the problems of small image plane size, small aperture, low resolution, weak stability, weak temperature environment resistance, weak interference resistance and the like.
Disclosure of Invention
The invention improves the problems, namely the technical problem to be solved by the invention is to provide the large-aperture high-definition athermalized traffic lens and the imaging method thereof, which improve the aberration of the large-aperture lens, the resolution of the lens and the stability of the lens.
The invention is composed of a front group A, a diaphragm C, a rear group B and a flat filter which are sequentially arranged along an image plane from a left object plane to a right object plane, wherein the front group A comprises a meniscus lens A1, a meniscus lens A2, a meniscus lens A3, a front group bonding sheet, a biconvex lens A6 and a biconvex lens A7 which are sequentially arranged from left to right, the rear group B comprises a first rear group bonding sheet, a second rear group bonding sheet and a biconvex lens B5 which are sequentially arranged from left to right, the front group bonding sheet comprises a meniscus lens A4 and a meniscus lens A5, the first rear group bonding sheet comprises a biconvex lens B1 and a biconcave lens B2, and the second rear group bonding sheet comprises a biconvex lens B3 and a biconvex lens B4.
Further, the air distance from the meniscus lens A1 to the meniscus lens A2 is 0.13mm, the air distance from the meniscus lens A2 to the meniscus lens A3 is 5.11mm, the air distance from the meniscus lens A3 to the front group of bonding sheets is 7.75mm, the air distance from the front group of bonding sheets to the lenticular lens A6 is 0.54mm, the air distance from the lenticular lens A6 to the lenticular lens A7 is 9mm, the air distance from the lenticular lens A7 to the diaphragm C is 0.12mm, the air distance from the diaphragm C to the first rear group of bonding sheets is 0.07mm, the air distance from the first rear group of bonding sheets to the second rear group of bonding sheets is 2.29mm, the air distance from the second rear group of bonding sheets to the lenticular lens B5 with positive power is 7.96mm, and the air distance from the lenticular lens B5 to the flat filter is 10.4mm; wherein the thickness of the flat filter is 1.8mm, and the air distance from the flat filter to the image surface is 0.1mm.
Further, the focal power of the front group of bonding sheets is negative, and the focal length f1 of the front group of bonding sheets is less than or equal to minus 62.5 and less than or equal to minus 1 and less than or equal to minus 60.8; the focal power of the first back group of bonding sheets is positive, and the combined focal length f2 is less than or equal to-128.2 and less than or equal to-124.5; the focal power of the second back group of bonding sheets is positive, and the combined focal length f3 is 103.5-106.4.
Further, the left R value of the meniscus lens A1 is more than or equal to 37.9 and less than or equal to 38.5, the right R value is more than or equal to 143 and less than or equal to 149, and the thickness of the lens is 4.35mm; r on the left side of the meniscus lens A2 is more than or equal to 21.2 and less than or equal to 22.5, R on the right side of the meniscus lens A2 is more than or equal to 9.9 and less than or equal to 10.3, and the thickness of the lens is 1.2mm; r on the left side of the meniscus lens A3 is more than or equal to 68.5 and less than or equal to 69.9, R on the right side of the meniscus lens A3 is more than or equal to 12.3 and less than or equal to 12.8, and the thickness of the lens is 0.9mm; the R value at the left side of the meniscus lens A4 is less than or equal to-12.6 and less than or equal to-12.1, the R value at the right side of the meniscus lens A4 is less than or equal to-8.7 and less than or equal to-8.2, and the thickness of the lens is 4.68mm; the R value at the left side of the meniscus lens A5 is less than or equal to-8.7 and less than or equal to-8.2, the R value at the right side of the meniscus lens A5 is less than or equal to-19.5 and less than or equal to-17.9, and the thickness of the lens is 0.9mm; the R value of the left surface of the biconvex lens A6 is 359.3-366.6, the R value of the right surface of the biconvex lens A6 is-33.5-31.3, and the thickness of the lens is 2.76mm; r on the left side of the biconvex lens A7 is more than or equal to 40.5 and less than or equal to 43.2, R on the right side of the biconvex lens A7 is more than or equal to-43.2 and less than or equal to-40.5, and the thickness of the lens is 3.51mm; r on the left side of the biconvex lens B1 is more than or equal to 21.2 and less than or equal to 23.6, R on the right side of the biconvex lens B1 is more than or equal to-17.4 and less than or equal to-15.5, and the thickness of the lens is 5.97mm; r on the left side of the biconcave lens B2 is more than or equal to-17.4 and less than or equal to-15.5, R on the right side of the biconcave lens B2 is more than or equal to 11.8 and less than or equal to 12.4, and the thickness of the biconcave lens is 0.91mm; r on the left side of the biconvex lens B3 is more than or equal to 286.5 and less than or equal to 299.7, R on the right side of the biconvex lens B3 is more than or equal to-10.5 and less than or equal to-9.4, and the thickness of the lens is 3.88mm; the left R value of the negative focal power meniscus lens B4 is less than or equal to-10.5 and less than or equal to-9.4, the right R value is less than or equal to-24.2 and less than or equal to-21.3, and the thickness of the lens is 0.79mm; the R value of the left surface of the biconvex lens B5 is more than or equal to 25.5 and less than or equal to 29.5, the R value of the right surface of the biconvex lens B5 is more than or equal to-36.5 and less than or equal to-33.2, and the thickness of the lens is 4.42mm.
Further, the bonding surfaces of the bonding sheets of the front group face away from the side of the diaphragm C, the bonding surfaces of the bonding sheets of the first back group are bent toward the side of the diaphragm C, and the bonding surfaces of the bonding sheets of the second back group are bent toward the side of the diaphragm C.
Further, the front group of bonding sheets are bonded by adopting materials with refractive indexes close to each other, the first back group of bonding sheets are bonded by adopting materials with larger Abbe number difference, and the second back group of bonding sheets are bonded by adopting materials with larger refractive indexes and Abbe number difference, so that chromatic aberration balance correction is facilitated, and on-axis spherical aberration is improved.
Further, the meniscus lens A1 adopts a high abbe number dense crown glass material, the meniscus lens A2 adopts a high abbe number lanthanum crown glass material, the meniscus lens A3 adopts a low refractive index and ultra-high abbe number fluorine crown glass material to correct chromatic aberration, the meniscus lens A4 adopts a high refractive index lanthanum flint glass material, the meniscus lens A5 adopts a high refractive index and low abbe number dense flint high-permeability glass material, the biconvex lens A6 adopts an ultra-high refractive index dense flint glass material to correct spherical aberration, the biconvex lens A7 adopts a high abbe number light crown glass material, the biconvex lens B1 adopts a high abbe number heavy phosphorus crown glass material, the biconcave lens B2 adopts a light flint glass material to form an achromatic and anti-spherical first rear group bonding sheet with the biconvex lens B1, the meniscus lens B4 adopts a ultra-high abbe number fluorine glass material, and the biconvex lens B4 adopts a biconvex glass material to form a second biconvex group after the biconvex lens B3 adopts a biconvex glass material.
Further, in the imaging method of the large-aperture high-definition athermalized traffic lens, light rays sequentially pass through the meniscus lens A1, the meniscus lens A2, the meniscus lens A3, the front group of bonding sheets, the biconvex lens A6 and the biconvex lens A7, the first rear group of bonding sheets, the second rear group of bonding sheets and the biconvex lens B5 from left to right and then are imaged.
Compared with the prior art, the invention has the following beneficial effects:
1. the whole lens is formed by combining a plurality of fluorine crown materials with low refractive indexes and high Abbe numbers with flint materials, so that low-order and high-order chromatic aberration and spherical aberration of the lens are effectively reduced, and the large aperture lens can have high resolution under a certain volume.
2. The lens adopts a athermal design, and the focal power of the fluorine crown glass, the dense phosphorus crown glass and the flint glass is optimally adjusted to mutually compensate the temperature drift curves of the fluorine crown glass, the dense phosphorus crown glass and the flint glass, so that the lens can perform clear imaging at different environmental temperatures.
3. The lens adopts a combination form of a plurality of spherical glass to correct each order aberration of the large aperture traffic lens, and can effectively reduce the light incidence angle and the emergence angle of light at the position of the lens close to the diaphragm by introducing materials with high refractive index, thereby effectively reducing the monochromatic aberration of the large aperture lens, reducing the lens assembly sensitivity and saving the assembly cost.
Drawings
FIG. 1 is a schematic view of a lens light path according to an embodiment of the present invention;
FIG. 2 is a point column diagram of an embodiment of the present invention;
FIG. 3 is a diagram of aberration of a fan according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an optical modulation transfer function according to an embodiment of the present invention;
fig. 5 is a graph of optical modulation transfer function as a function of field of view for an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Example 1: referring to fig. 1 to 5, in this embodiment, a large aperture high definition athermalized traffic lens is provided, which includes a front group a, a stop C, a rear group B and a panel filter IMA sequentially disposed along a left object plane to a right image plane, the front group a includes a meniscus lens A1 having positive optical power, a meniscus lens A2 having negative optical power, a meniscus lens A3 having negative optical power, a front group cemented lens, a biconvex lens A6 having positive optical power and a biconvex lens A7 having positive optical power sequentially disposed from left to right, the rear group B includes a first rear group cemented lens, a second rear group cemented lens and a biconvex lens B5 having positive optical power sequentially disposed from left to right, the front group cemented lens includes a meniscus lens A4 having positive optical power and a meniscus lens A5 having negative optical power, the first rear group cemented lens includes a lens B1 having positive optical power and a biconcave lens B2 having negative optical power, and the second rear group cemented lens B4 having positive optical power and B having negative optical power sequentially disposed from left to right.
The focal power of the front group A is positive, and the focal power of the rear group B is positive.
The diaphragm C is located between the front mirror a and the rear mirror B, and the flat filter is disposed in front of the image plane.
In this embodiment, the air distance from the meniscus lens A1 to the meniscus lens A2 is 0.13mm, the air distance from the meniscus lens A2 to the meniscus lens A3 is 5.11mm, the air distance from the meniscus lens A3 to the front group of bonding sheets is 7.75mm, the air distance from the front group of bonding sheets to the lenticular lens A6 is 0.54mm, the air distance from the lenticular lens A6 to the lenticular lens A7 is 9mm, the air distance from the lenticular lens A7 to the diaphragm C is 0.12mm, the air distance from the diaphragm C to the first back group of bonding sheets is 0.07mm, the air distance from the first back group of bonding sheets to the second back group of bonding sheets is 2.29mm, the air distance from the second back group of bonding sheets to the lenticular lens B5 with positive power is 7.96mm, and the air distance from the lenticular lens B5 to the panel filter is 10.4mm; wherein the thickness of the flat filter is 1.8mm, and the air distance from the flat filter to the image surface is 0.1mm.
In the embodiment, the focal power of the front group of bonding sheets is negative, and the focal length f1 of the front group of bonding sheets meets-62.5 and less than or equal to f1 and less than or equal to-60.8; the focal power of the first back group of bonding sheets is positive, and the combined focal length f2 is less than or equal to-128.2 and less than or equal to-124.5; the focal power of the second back group of bonding sheets is positive, and the combined focal length f3 is 103.5-106.4.
In the embodiment, the left R value of the meniscus lens A1 is more than or equal to 37.9 and less than or equal to 38.5, the right R value is more than or equal to 143 and less than or equal to 149, and the thickness of the lens is 4.35mm; r on the left side of the meniscus lens A2 is more than or equal to 21.2 and less than or equal to 22.5, R on the right side of the meniscus lens A2 is more than or equal to 9.9 and less than or equal to 10.3, and the thickness of the lens is 1.2mm; r on the left side of the meniscus lens A3 is more than or equal to 68.5 and less than or equal to 69.9, R on the right side of the meniscus lens A3 is more than or equal to 12.3 and less than or equal to 12.8, and the thickness of the lens is 0.9mm; the R value at the left side of the meniscus lens A4 is less than or equal to-12.6 and less than or equal to-12.1, the R value at the right side of the meniscus lens A4 is less than or equal to-8.7 and less than or equal to-8.2, and the thickness of the lens is 4.68mm; the R value at the left side of the meniscus lens A5 is less than or equal to-8.7 and less than or equal to-8.2, the R value at the right side of the meniscus lens A5 is less than or equal to-19.5 and less than or equal to-17.9, and the thickness of the lens is 0.9mm; the R value of the left surface of the biconvex lens A6 is 359.3-366.6, the R value of the right surface of the biconvex lens A6 is-33.5-31.3, and the thickness of the lens is 2.76mm; r on the left side of the biconvex lens A7 is more than or equal to 40.5 and less than or equal to 43.2, R on the right side of the biconvex lens A7 is more than or equal to-43.2 and less than or equal to-40.5, and the thickness of the lens is 3.51mm; r on the left side of the biconvex lens B1 is more than or equal to 21.2 and less than or equal to 23.6, R on the right side of the biconvex lens B1 is more than or equal to-17.4 and less than or equal to-15.5, and the thickness of the lens is 5.97mm; r on the left side of the biconcave lens B2 is more than or equal to-17.4 and less than or equal to-15.5, R on the right side of the biconcave lens B2 is more than or equal to 11.8 and less than or equal to 12.4, and the thickness of the biconcave lens is 0.91mm; r on the left side of the biconvex lens B3 is more than or equal to 286.5 and less than or equal to 299.7, R on the right side of the biconvex lens B3 is more than or equal to-10.5 and less than or equal to-9.4, and the thickness of the lens is 3.88mm; the left R value of the negative focal power meniscus lens B4 is less than or equal to-10.5 and less than or equal to-9.4, the right R value is less than or equal to-24.2 and less than or equal to-21.3, and the thickness of the lens is 0.79mm; the R value of the left surface of the biconvex lens B5 is more than or equal to 25.5 and less than or equal to 29.5, the R value of the right surface of the biconvex lens B5 is more than or equal to-36.5 and less than or equal to-33.2, and the thickness of the lens is 4.42mm.
In this embodiment, the positive meniscus lens A4 and the negative meniscus lens A5 are a front group of bonding sheets with bonding surfaces facing away from the diaphragm; the biconvex positive lens B1 and the biconcave negative lens B2 are a first back group of bonding sheets with a group of bonding surfaces bent to the diaphragm side, and the meniscus positive lens B3 and the meniscus negative lens B4 are a second back group of bonding sheets with a group of bonding surfaces bent to the diaphragm side, which is beneficial to the reduction of the incidence angle of light rays before and after the diaphragm C.
In this embodiment, the front group of bonding sheets are bonded by adopting materials with refractive indexes close to each other, the first back group of bonding sheets are bonded by adopting materials with larger abbe number differences, and the second back group of bonding sheets are bonded by adopting materials with larger refractive indexes and abbe number differences, so as to facilitate chromatic aberration balance correction and improve on-axis spherical aberration.
In this embodiment, the meniscus lens A1 is made of a high abbe number dense crown glass material, the meniscus lens A2 is made of a high abbe number lanthanum crown glass material, the meniscus lens A3 is made of a low refractive index, ultra-high abbe number fluorine crown glass material, the meniscus lens A4 is made of a high refractive index lanthanum flint glass material, the meniscus lens A5 is made of a high refractive index, low abbe number dense flint high-permeability glass material, the lenticular lens A6 is made of an ultra-high refractive index dense flint glass material, the lenticular lens A7 is made of a high abbe number light crown glass material, the lenticular lens B1 is made of a high abbe number heavy phosphorus crown glass material, the biconcave lens B2 is made of a light flint glass material, the biconvex lens B3 is made of an ultra-high abbe number fluorine glass material, the meniscus lens B4 is made of an ultra-high abbe number heavy flint crown glass material, and the biconvex lens B3 is made of an ultra-high-abbe number fluorine glass material, and the biconvex lens B3 is made of an ultra-high-abbe number glass material.
The fluorine crown glass material has high thermal expansion coefficient, and the temperature drift at different environmental temperatures can be compensated by adjusting the focal power of the material so as to realize athermalization function.
In this embodiment, the lens head can use a positive power meniscus lens to correct and balance the off-axis distortion of large field of view, and use high Abbe material to correct chromatic dispersion, and its focal length f A1 Satisfies f of 80.7 ∈ A1 ≤83.6。
In this embodiment, a1 inch large area camera may be disposed at the image plane of the lens to perform light sensing to achieve optical imaging and image information collection.
In this embodiment, at the time of imaging: the light rays sequentially pass through the meniscus lens A1, the meniscus lens A2, the meniscus lens A3, the front group of bonding sheets, the biconvex lens A6 and the biconvex lens A7, the first back group of bonding sheets, the second back group of bonding sheets and the biconvex lens B5 from left to right for imaging.
Example 2: in the present embodiment, the lens focal length f is equal to the focal length f of the front group A with positive power A The ratio of (2) satisfies the relation of 1.9.ltoreq.f A F is less than or equal to 2.1; focal length f of lens and focal length f of back group B with positive focal power B The ratio of (2) to (6) satisfies the relation of 2.6 to f B /f≤2.9。
In this embodiment, a large aperture high definition athermalized traffic lens composed of the optical lens set realizes the following optical indexes: focal length is 12mm, angle of view is 74.1 °, aperture F1.5, operating temperature: -30 ° to 70 °, can be used with 1 inch tens of millions of pixel chips.
In this embodiment, the following relationship exists in the large aperture high definition athermalized traffic lens: the focal length f1 of the front group of glued plates and the focal length f of the lens are less than or equal to-5.2 and less than or equal to-5.0, the focal length f1 of the first back group of glued plates and the focal length f of the lens are less than or equal to-10.7 and less than or equal to-1/f and less than or equal to-10.3, and the focal length f of the second back group of glued plates and the focal length f of the lens are less than or equal to 8.6 and less than or equal to 1/f and less than or equal to 8.9.
In this embodiment, the specific parameters of each lens in the optical system are shown in table 1 below, the thickness interval and curvature unit shown in table 1 below are all mm, and the surface numbers are sequentially arranged along the order from left to right shown in fig. 1:
TABLE 1
The optical lens parameter chart of the large aperture high definition athermalized traffic lens shown in fig. 1 has a simplified structure of a large aperture light path, and can ensure the assemblability.
The dot column diagram of the large-aperture high-definition athermalized traffic lens shown in fig. 2 has smaller spot radius, and can ensure excellent imaging sharpness and resolution. The optical fan aberration diagram of the large-aperture high-definition athermalized traffic lens shown in fig. 3 shows that aberrations in each view field of the large-aperture lens are sufficiently balanced and corrected.
The optical modulation transfer function diagrams and the optical modulation transfer function change diagrams of the large-aperture high-definition athermalized traffic lens shown in fig. 4 and 5 along with the view field can show that the transfer function values of the center and the outer ring of the lens under 150 line pairs are more than 0.4, and the transfer function curve transition of each view field is uniform and gentle, so that the lens has excellent graphic detail disclosure capability and can meet the requirement of full-view-field high-definition imaging.
In summary, the large aperture high definition athermalization traffic lens provided by the invention adopts the combination of a plurality of spherical lenses to correct the aberration of a large aperture and large image surface optical system, reduces the use cost of the lens to a certain extent, enables the lens to have zero temperature drifting athermalization functions at various environmental temperatures through reasonable material selection and optical power optimization balance, enables the resolution of the lens to be kept constant at each temperature, and enables the lens to obtain sufficient aberration balance through adjustment of the thickness and focal length of the lens, so that the lens has high definition imaging capability.
Any of the above-described embodiments of the present invention disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the invention, and the numerical values listed above should not limit the protection scope of the invention.
Meanwhile, if the above invention discloses or relates to parts or structural members fixedly connected with each other, the fixed connection may be understood as follows unless otherwise stated: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is used merely to facilitate distinguishing between components and not otherwise stated, and does not have a special meaning.
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (7)
1. The large-aperture high-definition athermalized traffic lens is characterized by comprising a front group A, a diaphragm C, a rear group B and a flat optical filter which are sequentially arranged along an image plane from a left object plane to a right object plane, wherein the front group A consists of a meniscus lens A1, a meniscus lens A2, a meniscus lens A3, a front group bonding sheet, a biconvex lens A6 and a biconvex lens A7 which are sequentially arranged from left to right, the rear group B consists of a first rear group bonding sheet, a second rear group bonding sheet and a biconvex lens B5 which are sequentially arranged from left to right, the front group bonding sheet consists of a meniscus lens A4 and a biconcave lens B2, and the second rear group bonding sheet consists of a biconvex lens B3 and a biconcave lens B4;
the focal power of the front group of bonding sheets is negative, and the focal length f1 of the front group of bonding sheets is less than or equal to minus 62.5 and less than or equal to minus 1 and less than or equal to minus 60.8; the focal power of the first back group of bonding sheets is positive, and the focal length f2 of the first back group of bonding sheets is less than or equal to-128.2 and less than or equal to-124.5; the focal power of the second back group of bonding sheets is positive, and the focal length f3 of the second back group of bonding sheets is 103.5-106.4.
2. The large aperture high definition athermalized traffic lens according to claim 1, wherein the air distance from the meniscus lens A1 to the meniscus lens A2 is 0.13mm, the air distance from the meniscus lens A2 to the meniscus lens A3 is 5.11mm, the air distance from the meniscus lens A3 to the front group of glue sheets is 7.75mm, the air distance from the front group of glue sheets to the lenticular lens A6 is 0.54mm, the air distance from the lenticular lens A6 to the lenticular lens A7 is 9mm, the air distance from the lenticular lens A7 to the diaphragm C is 0.12mm, the air distance from the diaphragm C to the first back group of glue sheets is 0.07mm, the air distance from the first back group of glue sheets to the second back group of glue sheets is 2.29mm, the air distance from the second back group of glue sheets to the lenticular lens B5 with positive power is 7.96mm, and the air distance from the lenticular lens B5 to the flat panel is 10.4mm; wherein the thickness of the flat filter is 1.8mm, and the air distance from the flat filter to the image surface is 0.1mm.
3. The large-aperture high-definition athermalized traffic lens according to claim 1, wherein the left R value of the meniscus lens A1 is more than or equal to 37.9 and less than or equal to 38.5, the right R value is more than or equal to 143 and less than or equal to 149, and the thickness of the meniscus lens A1 is 4.35mm; r on the left side of the meniscus lens A2 is more than or equal to 21.2 and less than or equal to 22.5, R on the right side of the meniscus lens A2 is more than or equal to 9.9 and less than or equal to 10.3, and the thickness of the meniscus lens A2 is 1.2mm; the R value of the left side of the meniscus lens A3 is 68.5-69.9, the R value of the right side of the meniscus lens A3 is 12.3-12.8, and the thickness of the meniscus lens A3 is 0.9mm; the left R value of the meniscus lens A4 is less than or equal to-12.6 and less than or equal to-12.1, the right R value is less than or equal to-8.7 and less than or equal to-8.2, and the thickness of the meniscus lens A4 is 4.68mm; the R value of the left surface of the meniscus lens A5 is less than or equal to-8.7 and less than or equal to-8.2, the R value of the right surface of the meniscus lens A5 is less than or equal to-19.5 and less than or equal to-17.9, and the thickness of the meniscus lens A5 is 0.9mm; the R value of the left surface of the biconvex lens A6 is 359.3-366.6, the R value of the right surface of the biconvex lens A6 is-33.5-31.3, and the thickness of the biconvex lens A6 is 2.76mm; r on the left side of the biconvex lens A7 is more than or equal to 40.5 and less than or equal to 43.2, R on the right side of the biconvex lens A7 is more than or equal to-43.2 and less than or equal to-40.5, and the thickness of the biconvex lens A7 is 3.51mm; r on the left side of the biconvex lens B1 is more than or equal to 21.2 and less than or equal to 23.6, R on the right side of the biconvex lens B1 is more than or equal to-17.4 and less than or equal to-15.5, and the thickness of the biconvex lens B1 is 5.97mm; r on the left side of the biconcave lens B2 is more than or equal to-17.4 and less than or equal to-15.5, R on the right side of the biconcave lens B2 is more than or equal to 11.8 and less than or equal to 12.4, and the thickness of the biconcave lens B2 is 0.91mm; r on the left side of the biconvex lens B3 is more than or equal to 286.5 and less than or equal to 299.7, R on the right side of the biconvex lens B3 is more than or equal to-10.5 and less than or equal to-9.4, and the thickness of the biconvex lens B3 is 3.88mm; the left R value of the meniscus lens B4 with negative focal power is less than or equal to-10.5 and less than or equal to-9.4, the right R value is less than or equal to-24.2 and less than or equal to-21.3, and the thickness of the meniscus lens B4 is 0.79mm; the R value of the left surface of the lenticular lens B5 is more than or equal to 25.5 and less than or equal to 29.5, the R value of the right surface of the lenticular lens B5 is more than or equal to-36.5 and less than or equal to-33.2, and the thickness of the lenticular lens B4 is 4.42mm.
4. The large aperture high definition athermalized traffic lens according to claim 1, wherein the bonding surfaces of the front group of bonding sheets are directed away from the stop C side, the bonding surfaces of the first back group of bonding sheets are directed towards the stop C side, and the bonding surfaces of the second back group of bonding sheets are directed towards the stop C side.
5. The large-aperture high-definition athermalized traffic lens according to claim 1, wherein the front group of bonding sheets are bonded by adopting materials with refractive indexes close to each other, the first rear group of bonding sheets are bonded by adopting materials with larger Abbe number difference, and the second rear group of bonding sheets are bonded by adopting materials with larger refractive indexes and Abbe number difference, so that chromatic aberration balance correction is facilitated, and on-axis spherical aberration is improved.
6. The high-aperture high-definition athermalized traffic lens according to claim 1, wherein the meniscus lens A1 is made of a high-abbe-number dense crown glass material, the meniscus lens A2 is made of a high-abbe-number lanthanum crown glass material, the meniscus lens A3 is made of a low-refractive-index and ultra-high-abbe-number fluorine crown glass material for chromatic aberration correction, the meniscus lens A4 is made of a high-refractive-index lanthanum flint glass material, the meniscus lens A5 is made of a high-refractive-index and low-abbe-number dense flint high-permeability glass material, the biconvex lens A6 is made of an ultra-high-refractive-index dense flint glass material for spherical aberration correction, the biconvex lens A7 is made of a high-abbe-number light crown glass material, the biconvex lens B1 is made of a high-abbe-number dense crown glass material for chromatic aberration correction, the biconvex lens B3 is made of a ultra-high-abbe-number fluorine crown glass material for forming a first rear group of achromatic and an ultra-high-abbe-number glass material for forming a biconvex lens B3, and the biconvex lens B4 is made of an ultra-high-refractive-abbe-index glass material for forming a biconvex lens B4.
7. The imaging method of a large aperture high definition athermalized traffic lens according to any one of claims 1 to 6, wherein light sequentially passes through a meniscus lens A1, a meniscus lens A2, a meniscus lens A3, a front group of cemented lens, a biconvex lens A6 and a biconvex lens A7, a first back group of cemented lens, a second back group of cemented lens and a biconvex lens B5 from left to right for imaging.
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