CN213338184U - 1 inch target surface wide-angle low-distortion fixed-focus lens - Google Patents
1 inch target surface wide-angle low-distortion fixed-focus lens Download PDFInfo
- Publication number
- CN213338184U CN213338184U CN202022676719.0U CN202022676719U CN213338184U CN 213338184 U CN213338184 U CN 213338184U CN 202022676719 U CN202022676719 U CN 202022676719U CN 213338184 U CN213338184 U CN 213338184U
- Authority
- CN
- China
- Prior art keywords
- lens
- equal
- less
- facing
- refractive index
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lenses (AREA)
Abstract
The utility model relates to the technical field of lens, in particular to a 1 inch wide-angle low-distortion fixed-focus lens with a target surface, wherein a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a biconvex lens and a light filter are arranged from an object space to an image space in sequence; the first lens, the third lens, the fourth lens, the sixth lens, the seventh lens and the eighth lens are meniscus lenses; and the second lens and the fifth lens are both plano-convex lenses. The utility model provides a pair of 1 inch target surface wide angle low distortion prime lens through 9 pieces of glass sphere lenses, has solved big target surface camera lens size big, has used the aspheric surface lens to lead to with high costs, the lens number is many or some lens technical problem such as not good processing, has that optics aberration becomes low to below 0.45%, the definition is high to 20MP, light in weight, weatherability is good, tolerance sensitivity is low, be suitable for advantages such as batch production.
Description
Technical Field
The utility model relates to a camera lens technical field, in particular to 1 inch target surface wide angle low distortion prime lens.
Background
With the development of unmanned aerial vehicle technology, the application is to bloom all the time. In the aspect of land resource investigation and management, the unmanned aerial vehicle can carry a plurality of lenses to carry out landform surveying and mapping. Compare traditional cadastral survey and drawing, unmanned aerial vehicle survey and drawing is very convenient and fast. In addition, some tourist attractions, mining areas, villages, industrial parks and the like can obtain three-dimensional maps quickly by means of unmanned aerial vehicle surveying and mapping.
For example, the lens disclosed in patent documents with publication number CN207114859U, publication number 2018, 3, 16 and name "large target surface machine vision lens and camera shooting device" adopts 9 glass spherical lenses, 4 in front of the diaphragm and 5 behind the diaphragm, and the total optical length is longer and larger than 33.0mm, and the diameter is also larger, so the weight is heavier;
as another example, a lens disclosed in patent document CN110531489A, 03.12.2019, entitled "unmanned aerial vehicle camera lens with large target surface and small distortion", adopts 10 lenses, wherein 8 glass spherical lenses and 2 plastic aspheric lenses have high resolution, and can achieve an imaging effect of 2000 ten thousand pixels, but the cost of the glass-plastic hybrid lens is not very high.
For another example, in a lens disclosed in patent document CN209842210U, 24.12.2019, entitled "a large-field athermalized visible light lens", 10 spherical glass lenses, 6 lenses in front of the diaphragm, 4 lenses behind the diaphragm, and a large number of lenses are adopted, wherein individual lenses are not easy to process and the manufacturing cost is high.
Therefore, the current large-target-surface lens has the problems of large size, heavy weight and high cost caused by using an aspheric lens, and needs to be further improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of large size, heavy weight and high cost caused by using an aspheric lens in the large target surface lens mentioned in the background technology, the utility model provides a 1-inch wide-angle low-distortion fixed-focus lens with a target surface, which is provided with a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a biconvex lens and a light filter in sequence from the object space to the image space;
the first lens, the third lens, the fourth lens, the sixth lens, the seventh lens and the eighth lens are meniscus lenses;
and the second lens and the fifth lens are both plano-convex lenses.
In addition to the above structure, a surface of the first lens facing the object side is a convex surface, and a surface facing the image side is a concave surface;
one surface of the second lens, which faces the object space, is a convex surface, and the other surface of the second lens, which faces the image space, is a plane;
one surface of the third lens, which faces the object space, is a convex surface, and the other surface of the third lens, which faces the image space, is a concave surface;
one surface of the fourth lens, which faces the object space, is a convex surface, and the other surface of the fourth lens, which faces the image space, is a concave surface;
one surface of the fifth lens, which faces the object space, is a plane, and the other surface of the fifth lens, which faces the image space, is a convex surface;
one surface of the sixth lens, which faces the object space, is a concave surface, and one surface of the sixth lens, which faces the image space, is a convex surface;
one surface of the seventh lens, which faces the object space, is a concave surface, and one surface of the seventh lens, which faces the image space, is a convex surface;
one surface of the eighth lens, which faces the object space, is a concave surface, and one surface of the eighth lens, which faces the image space, is a convex surface;
the surface of the biconvex lens facing the object space is a convex surface, and the surface facing the image space is also a convex surface.
In addition to the above structure, further, the first lens, the fourth lens, and the eighth lens have negative power;
the third lens, the sixth lens and the seventh lens all have positive focal power.
On the basis of the structure, the meniscus lens, the plano-convex lens and the biconvex lens are all glass spherical lenses.
On the basis of the structure, the optical filter is an infrared cut filter or a blue glass filter.
In addition to the above configuration, the refractive index nd and the abbe number Vd of each lens are as follows:
the refractive index nd1 of the first lens is more than or equal to 1.60 and less than or equal to 1.70, and the Abbe number Vd1 is more than or equal to 25 and less than or equal to 35;
the refractive index nd2 of the second lens is more than or equal to 1.75 and less than or equal to 1.85, and the Abbe number Vd2 is more than or equal to 40 and less than or equal to 50;
the refractive index nd3 of the third lens is more than or equal to 1.90 and less than or equal to 2.0, and the Abbe number Vd3 is more than or equal to 25 and less than or equal to 35;
the refractive index nd4 of the fourth lens is more than or equal to 1.70 and less than or equal to 1.80, and the Abbe number is more than or equal to 20 and less than or equal to Vd4 and less than or equal to 35;
the refractive index nd5 of the fifth lens is more than or equal to 1.60 and less than or equal to 1.75, and the Abbe number Vd5 of the fifth lens is more than or equal to 50 and less than or equal to 60;
the refractive index nd6 of the sixth lens is more than or equal to 1.55 and less than or equal to 1.70, and the Abbe number Vd6 of the sixth lens is more than or equal to 50 and less than or equal to 70;
the refractive index nd7 of the seventh lens is more than or equal to 1.43 and less than or equal to 1.55, and the Abbe number Vd7 of the seventh lens is more than or equal to 60 and less than or equal to 95;
the refractive index nd8 of the eighth lens is more than or equal to 1.75 and less than or equal to 1.90, and the Abbe number Vd8 is more than or equal to 18 and less than or equal to 30;
the refractive index nd9 of the biconvex lens is more than or equal to 1.65 and less than or equal to 1.80, and the Abbe number Vd9 is more than or equal to 40 and less than or equal to 60.
On the basis of the structure, the total optical length TTL of the lens is less than or equal to 33.0 mm.
On the basis of the structure, the third lens and the fourth lens are further glued to form a double-glued lens.
On the basis of the structure, a first space ring is arranged between the sixth lens and the seventh lens, a second space ring is arranged between the seventh lens and the eighth lens, and the thermal expansion coefficient of the first space ring is larger than that of the second space ring;
the first space ring is made of plastic or teflon; the second space ring is made of invar alloy or super invar alloy.
The utility model provides a pair of 1 inch target surface wide angle low distortion prime lens compares with prior art, has following technological effect:
1. can support an image sensor with the size of 1 inch;
2. when the size of the corresponding chip is 1 inch, the optical distortion of the lens is lower than 0.45%, the definition is as high as 20MP, the diffraction limit is approached, and meanwhile, the imaging has no purple fringing problem;
3. the total optical length of the lens is less than 33.0mm, and the whole weight is light, so that the unmanned aerial vehicle can carry a plurality of lenses;
4. the weatherability of the lens is good, and the definition is kept unchanged under the high and low temperature environment;
5. the lens has low tolerance sensitivity and is suitable for mass production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a 1-inch wide-angle low-distortion fixed-focus lens with a target surface.
Fig. 2 is a schematic view of an optical path of the lens provided by the present invention.
Fig. 3 is a dot array diagram of the lens under visible light.
Fig. 4 is a MTF graph of the lens under visible light.
Fig. 5 is a field curvature and distortion diagram of the lens under visible light.
Fig. 6 is a graph of relative illuminance of the lens under visible light.
Fig. 7 is the utility model provides a defocusing MTF curve graph of lens under visible light.
Fig. 8 is a graph of the magnification chromatic aberration of the lens under visible light
Reference numerals:
101 first lens 102 second lens 103 third lens
104 fourth lens 105 diaphragm 106 fifth lens
107 sixth lens 108 seventh lens 109 eighth lens
110 biconvex lens 111 filter 201 lens barrel
208 first spacer 209 second spacer
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "couple" or "couples" and the like are not restricted to physical or mechanical connections, but may include electrical connections, optical connections, and the like, whether direct or indirect.
The utility model provides a 1 inch target surface wide angle low distortion prime lens is equipped with first lens 101, second lens 102, third lens 103, fourth lens 104, diaphragm 105, fifth lens 106, sixth lens 107, seventh lens 108, eighth lens 109, biconvex lens 110 and light filter 111 from the object space to the image space in proper order;
the first lens 101, the third lens 103, the fourth lens 104, the sixth lens 107, the seventh lens 108 and the eighth lens 109 are all meniscus lenses;
the second lens 102 and the fifth lens 106 are both plano-convex lenses.
In specific implementation, the first lens 101 is a meniscus glass spherical lens with low refractive index and high dispersion, the surface R1 of the first lens 101 facing the object side is a convex surface, the surface R2 of the first lens 101 facing the image side is a concave surface, the refractive index nd1 of the first lens 101 is not less than 1.60 and not more than 1.70, and the abbe number Vd1 is not less than 35;
the second lens 102 is a plano-convex glass spherical lens with high refractive index and low dispersion, R3 on one surface of the second lens 102 facing an object side is a convex surface, R4 on one surface of the second lens 102 facing an image side is a plane, the refractive index of the second lens 102 is more than or equal to 1.75 and less than or equal to nd2 and less than or equal to 1.85, and the Abbe number is more than or equal to 40 and less than or equal to Vd2 and less than or equal to 50;
the third lens 103 is a high-refractive-index and high-dispersion meniscus glass spherical lens, R5 on the surface of the third lens 103 facing the object side is a convex surface, R6 on the surface of the third lens 103 facing the image side is a concave surface, the refractive index nd3 of the third lens 103 is more than or equal to 1.90 and less than or equal to 2.0, and the Abbe number Vd3 is more than or equal to 25 and less than or equal to 35;
the fourth lens 104 is a high-refractive-index and high-dispersion meniscus glass spherical lens, the R7 on the surface of the fourth lens 104 facing the object side is a convex surface, the R8 on the surface of the fourth lens 104 facing the image side is a concave surface, the refractive index nd4 of the fourth lens 104 is more than or equal to 1.70 and less than or equal to 1.80, and the Abbe number Vd4 is more than or equal to 20 and less than or equal to 35;
the fifth lens 106 is a plano-convex glass spherical lens with high refractive index and low dispersion, one surface R10 of the fifth lens 106 facing the object side is a plane, one surface R11 of the fifth lens 106 facing the image side is a convex surface, the refractive index nd5 of the fifth lens 106 is more than or equal to 1.60 and less than or equal to 1.75, and the Abbe number Vd5 is more than or equal to 50 and less than or equal to 60;
the sixth lens 107 is a meniscus glass spherical lens with low refractive index and low dispersion, one surface R12 of the sixth lens 107 facing the object side is a concave surface, one surface R13 of the sixth lens 107 facing the image side is a convex surface, the refractive index nd6 of the sixth lens 107 is more than or equal to 1.55 and less than or equal to 1.70, and the Abbe number Vd6 is more than or equal to 50 and less than or equal to 70;
the seventh lens 108 is a meniscus glass spherical lens with low refractive index and low dispersion, the R14 of the surface of the seventh lens 108 facing the object side is a concave surface, the R15 of the surface of the seventh lens 108 facing the image side is a convex surface, the refractive index nd7 of the seventh lens 108 is more than or equal to 1.43 and less than or equal to 1.55, and the Abbe number Vd7 is more than or equal to 60 and less than or equal to 95;
the eighth lens 109 is a high-refractive-index and high-dispersion meniscus glass spherical lens, the R16 on the surface of the eighth lens 109 facing the object side is a concave surface, the R17 on the surface of the eighth lens 109 facing the image side is a convex surface, the refractive index of the eighth lens 109 is more than or equal to 1.75 and less than or equal to nd8 and less than or equal to 1.90, and the Abbe number is more than or equal to 18 and less than or equal to Vd8 and less than or equal to 30;
the biconvex lens 110 is a biconvex glass spherical lens with high refractive index and low dispersion, R18 on one surface of the biconvex lens 110 facing an object side is a convex surface, R19 on one surface of the biconvex lens 110 facing an image side is a convex surface, the refractive index of the biconvex lens 110 is more than or equal to 1.65 and less than or equal to nd9 and less than or equal to 1.80, and the Abbe number is more than or equal to 40 and less than or equal to Vd 9.
The utility model provides a 1 inch wide-angle low-distortion prime lens with a target surface, which solves the technical problems of large size of a large-target-surface lens, high cost, more lenses or poor processing of some lenses due to the use of aspheric lenses and the like through 9 glass spherical lenses; the lens is guided into a visible light wave band of 436nm to 656nm, is applied to three-dimensional mapping of an unmanned aerial vehicle when the size of a corresponding chip is 1 inch, and has the advantages of optical distortion reduction to be less than 0.45%, definition as high as 20MP, light weight, good weather resistance, low tolerance sensitivity, suitability for batch production and the like.
Preferably, the third lens 103 and the fourth lens 104 are cemented together to form a double cemented lens with negative power.
Preferably, the filter 111 is an infrared cut filter or a blue glass filter.
Preferably, the total optical length TTL of the lens is less than or equal to 33.0 mm.
Preferably, a first spacer 208 is disposed between the sixth lens 107 and the seventh lens 108, and a second spacer 209 is disposed between the seventh lens 108 and the eighth lens 109;
the first space ring 208 is made of plastic or teflon, and the second space ring is made of invar alloy or super invar alloy.
In specific implementation, except the first space ring 208 and the second space ring 209, the lens barrel 201 and other space rings in the lens provided by the utility model are made of conventional aluminum alloy 6061;
compared with the conventional aluminum alloy 6061 material, the first space ring 208 is made of plastic or teflon and has a larger thermal expansion coefficient; the second space ring 209 is made of invar alloy or super invar alloy and has a smaller thermal expansion coefficient; the purpose is to maintain the performance of the lens at high and low ambient temperatures.
The utility model discloses still provide following embodiment:
the optical lens has an overall focal length value EFL, an aperture value FNO, a diagonal field angle DFOV, a total lens optical length TTL, an image plane chief ray incident angle CRA, and mirror surfaces numbered sequentially from the object side, wherein the mirror surfaces of the first lens 101 are R1 and R2, the mirror surface of the second lens 102 is R3 and R4, the mirror surface of the third lens 103 is R5 and R6, the mirror surface of the fourth lens 104 is R7 and R8, the stop 105, the mirror surface of the fifth lens 106 is R10 and R11, the mirror surface of the sixth lens 107 is R12 and R13, the mirror surface of the seventh lens 108 is R14 and R15, the mirror surface of the eighth lens 109 is R16 and R17, the mirror surface of the lens 110 is R18 and R19, the optical filter 111 is sealed glass on the surface of the photosensitive imaging chip.
Wherein, the selected parameter values are as follows: EFL 12.8mm, FNO 4.0, DFOV 64 °, TTL 33.0mm, CRA 15.11 °, photoimaging chip IMX283 of SONY, unit: mm. The detailed parameters of the wide-angle low-distortion fixed-focus lens with 1-inch target surface are shown in table 1:
TABLE 1
The optical performance curves of the lens provided by the present embodiment are shown in fig. 3 to 8:
FIG. 3 is a dot diagram under visible light, wherein the wavelengths are 436nm, 487nm, 546nm, 587nm and 656nm, and the weight ratio is 9:23:29:27: 10. As can be seen from fig. 3, the scattered spots in each field are relatively concentrated, close to the diffraction limit, and the distribution is relatively uniform.
FIG. 4 is a graph of MTF under visible light, which represents the comprehensive resolution level of an optical system, and it can be seen from FIG. 4 that the MTF value at 200lp/mm of the central field is greater than or equal to 0.3, the MTF value at 125lp/mm of the edge field is greater than or equal to 0.3, and the MTF value at 140lp/mm is greater than or equal to 0.2. In the aspect of definition, although the peripheral field is less than the central field, since the F number at the peripheral field is greater than that of the central field, the limit spatial frequency of the peripheral field is also lower than that of the central field, and the actual performance is that the MTF of the peripheral field is close to the diffraction limit.
FIG. 5 is a graph of field curvature/distortion under visible light, the distortion curve representing the magnitude of F-Tan (theta) distortion in% for different angles of view. As can be seen from FIG. 5, the optical distortion is barrel distortion, the absolute value of which is 0.45% or less.
Fig. 6 is a graph of relative illuminance under visible light, and it can be seen from fig. 6 that the curve drops smoothly, the relative illuminance value under the maximum field of view is greater than 0.44, and the imaged picture is brighter.
FIG. 7 is a graph of the through focus MTF under visible light, with spatial frequency taken at 100lp/mm and through focus ranging from-0.1 mm to 0.1 mm. The map may reflect the degree of curvature of field correction. When a system has field curvature, the result is that the center and the periphery cannot be synchronously clear, namely, when the center of a visual field is adjusted to be clearest, the edge is not clear enough; the definition of the center of the field of view needs to be reduced by adjusting the back focus to make the edge of the field of view clearer; as can be seen from fig. 7, the field curvature is better corrected.
Fig. 8 is a graph of chromatic aberration of magnification in visible light, from which the degree of chromatic aberration of magnification correction can be known in conjunction with the size of pixel particles. As can be seen from fig. 8, the magnification chromatic aberration is corrected well without the purple fringing problem.
Although terms such as meniscus, diaphragm, spacer, barrel, biconvex, plano-convex, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A1-inch wide-angle low-distortion fixed-focus lens with a target surface is characterized in that a first lens (101), a second lens (102), a third lens (103), a fourth lens (104), a diaphragm (105), a fifth lens (106), a sixth lens (107), a seventh lens (108), an eighth lens (109), a double-convex lens (110) and a filter (111) are arranged in sequence from an object side to an image side;
the first lens (101), the third lens (103), the fourth lens (104), the sixth lens (107), the seventh lens (108) and the eighth lens (109) are meniscus lenses;
the second lens (102) and the fifth lens (106) are both plano-convex lenses.
2. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: one surface of the first lens (101) facing the object space is a convex surface, and the other surface of the first lens facing the image space is a concave surface;
one surface of the second lens (102) facing the object space is a convex surface, and the other surface facing the image space is a plane;
one surface of the third lens (103) facing the object space is a convex surface, and the other surface of the third lens facing the image space is a concave surface;
one surface of the fourth lens (104) facing the object space is a convex surface, and the other surface of the fourth lens facing the image space is a concave surface;
one surface of the fifth lens (106) facing the object space is a plane, and the other surface of the fifth lens facing the image space is a convex surface;
one surface of the sixth lens (107) facing the object side is a concave surface, and the other surface facing the image side is a convex surface;
one surface of the seventh lens (108) facing the object side is a concave surface, and the other surface of the seventh lens facing the image side is a convex surface;
one surface of the eighth lens (109) facing the object space is a concave surface, and the other surface facing the image space is a convex surface;
the surface of the biconvex lens (110) facing the object side is a convex surface, and the surface facing the image side is also a convex surface.
3. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: the first lens (101), the fourth lens (104), and the eighth lens (109) have negative optical powers.
4. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: the third lens (103), the sixth lens (107) and the seventh lens (108) all have positive focal power.
5. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: the meniscus lens, the plano-convex lens and the biconvex lens (110) are all glass spherical lenses.
6. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: the optical filter (111) is an infrared cut-off filter or a blue glass filter.
7. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: the refractive index nd and the abbe number Vd of each lens are as follows:
the refractive index nd1 of the first lens (101) is more than or equal to 1.60 and less than or equal to 1.70, and the Abbe number Vd1 is more than or equal to 25 and less than or equal to 35;
the refractive index nd2 of the second lens (102) is more than or equal to 1.75 and less than or equal to 1.85, and the Abbe number Vd2 is more than or equal to 40 and less than or equal to 50;
the refractive index nd3 of the third lens (103) is more than or equal to 1.90 and less than or equal to 2.0, and the Abbe number Vd3 is more than or equal to 25 and less than or equal to 35;
the refractive index nd4 of the fourth lens (104) is more than or equal to 1.70 and less than or equal to 1.80, and the Abbe number is more than or equal to 20 and less than or equal to Vd4 and less than or equal to 35;
the refractive index nd5 of the fifth lens (106) is more than or equal to 1.60 and less than or equal to 1.75, and the Abbe number Vd5 is more than or equal to 50 and less than or equal to 60;
the refractive index nd6 of the sixth lens (107) is more than or equal to 1.55 and less than or equal to 1.70, and the Abbe number Vd6 is more than or equal to 50 and less than or equal to 70;
the refractive index nd7 of the seventh lens (108) is more than or equal to 1.43 and less than or equal to 1.55, and the Abbe number Vd7 is more than or equal to 60 and less than or equal to 95;
the refractive index nd8 of the eighth lens (109) is more than or equal to 1.75 and less than or equal to 1.90, and the Abbe number Vd8 is more than or equal to 18 and less than or equal to 30;
the refractive index nd9 of the biconvex lens (110) is more than or equal to 1.65 and less than or equal to 1.80, and the Abbe number Vd9 is more than or equal to 40 and less than or equal to 60.
8. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: the total optical length TTL of the lens is less than or equal to 33.0 mm.
9. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: the third lens (103) and the fourth lens (104) are glued to form a double-cemented lens.
10. The wide-angle low-distortion fixed-focus lens with a 1-inch target surface as claimed in claim 1, wherein: a first space ring (208) is arranged between the sixth lens (107) and the seventh lens (108), and a second space ring (209) is arranged between the seventh lens (108) and the eighth lens (109);
the first space ring (208) is made of plastic or Teflon, and the second space ring is made of invar alloy or super invar alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022676719.0U CN213338184U (en) | 2020-11-18 | 2020-11-18 | 1 inch target surface wide-angle low-distortion fixed-focus lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022676719.0U CN213338184U (en) | 2020-11-18 | 2020-11-18 | 1 inch target surface wide-angle low-distortion fixed-focus lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213338184U true CN213338184U (en) | 2021-06-01 |
Family
ID=76077577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022676719.0U Active CN213338184U (en) | 2020-11-18 | 2020-11-18 | 1 inch target surface wide-angle low-distortion fixed-focus lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213338184U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488485A (en) * | 2022-02-14 | 2022-05-13 | 合肥埃科光电科技股份有限公司 | Large-target-surface wide-angle low-distortion industrial lens of f22mm |
| CN115808771A (en) * | 2022-12-30 | 2023-03-17 | 中国科学院长春光学精密机械与物理研究所 | Large-target-surface ultra-wide-angle transmission visible lens |
-
2020
- 2020-11-18 CN CN202022676719.0U patent/CN213338184U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488485A (en) * | 2022-02-14 | 2022-05-13 | 合肥埃科光电科技股份有限公司 | Large-target-surface wide-angle low-distortion industrial lens of f22mm |
| CN115808771A (en) * | 2022-12-30 | 2023-03-17 | 中国科学院长春光学精密机械与物理研究所 | Large-target-surface ultra-wide-angle transmission visible lens |
| CN115808771B (en) * | 2022-12-30 | 2024-04-19 | 中国科学院长春光学精密机械与物理研究所 | Large target surface ultra-wide angle transmission visible light lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106772935B (en) | Lens system and fixed-focus lens | |
| CN108318995B (en) | Lens system and lens | |
| CN105700117B (en) | A kind of optical imaging system | |
| JP6741019B2 (en) | Imaging lens and in-vehicle imaging device | |
| CN213338184U (en) | 1 inch target surface wide-angle low-distortion fixed-focus lens | |
| CN206321862U (en) | A kind of 360 ° of panorama fish eye lenses | |
| CN103513407B (en) | Zoom lens | |
| CN108663783B (en) | Large-aperture low-cost panoramic fisheye lens | |
| WO2021027287A1 (en) | Large-aperture lens and terminal device | |
| CN107861229B (en) | High definition wide angle unmanned aerial vehicle camera lens | |
| KR20160112306A (en) | Super wide angle lens and photographing lens having the same | |
| CN109324395A (en) | A kind of undistorted glass modeling camera lens of fixed-focus | |
| CN106094183B (en) | Focusing-style optical imaging system in a kind of high image quality | |
| CN212433497U (en) | Small-size fisheye optical system with ultra-wide angle, ultra-high pixel and low chromatic aberration and camera module | |
| CN205581383U (en) | High picture height is like matter optical imaging system | |
| CN116880040A (en) | Infrared confocal optical lens and imaging device | |
| CN209167657U (en) | A kind of undistorted glass modeling camera lens of fixed-focus | |
| CN109061841B (en) | 4K fish-eye lens | |
| CN111880292A (en) | Small-size fisheye camera module with ultra-wide angle, ultra-high pixel and low chromatic aberration | |
| CN114859532B (en) | Lens and camera device | |
| CN104797968A (en) | Variofocusing monitoring shot and monitoring device | |
| CN114167579B (en) | Lens | |
| CN110161655A (en) | Wide-angle day and night camera module of the confocal type without thermalization optical system and its application | |
| CN206331171U (en) | A kind of lens combination and tight shot | |
| CN214225558U (en) | Fixed focus lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |