CN217846757U - Small-size portable low-light-level lens - Google Patents
Small-size portable low-light-level lens Download PDFInfo
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- CN217846757U CN217846757U CN202221549844.8U CN202221549844U CN217846757U CN 217846757 U CN217846757 U CN 217846757U CN 202221549844 U CN202221549844 U CN 202221549844U CN 217846757 U CN217846757 U CN 217846757U
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Abstract
The utility model discloses a portable shimmer camera lens of little volume, include and include first lens by the thing side to picture side in proper order, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, eighth lens and ninth lens, first lens and second lens are the meniscus spherical lens of positive focal power, the concave surface of first lens and second lens all faces picture side, first lens and second lens glue into an organic whole, the third lens is the biconcave spherical lens of negative focal power, fourth lens and fifth lens are the biconvex spherical lens of positive focal power, the sixth lens is the meniscus spherical lens of positive focal power, the concave surface of sixth lens faces picture side, the seventh lens is the biconcave spherical lens of negative focal power, the eighth lens is the biconvex spherical lens of positive focal power, the ninth lens is the meniscus spherical lens of meniscus focal power, the concave surface of ninth lens faces the thing side, through the reasonable structure collocation of a plurality of lenses, make the camera lens short and small and exquisite, portable.
Description
Technical Field
The utility model relates to an optical element field, in particular to portable shimmer camera lens of little volume.
Background
The low-light night vision lens is more and more widely applied to the aspects of security monitoring, military equipment, national security, submarine exploration, satellite remote sensing, biological research and the like. Because the wavelength of the micro-optical lens covers the near-infrared band, the micro-optical lens is designed and matched with the large aperture, so that the micro-optical lens also has strong observation capability at night. This is also an advantage not comparable to a normal visible light lens. The large aperture, the large target surface, the small volume and the light weight of the low-light-level lens are the current market trends, but the design difficulty is also high, and the large aperture and the large size and the heavy weight are difficult to avoid in order to match the large target surface and the large aperture. In view of the not enough of prior art, the utility model provides a big light ring, shimmer camera lens of big target surface through reasonable structure collocation, makes the camera lens short and light and handy, and portable is particularly suitable for various occasions to the weight volume is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a portable shimmer camera lens of little volume aims at solving among the prior art and all is difficult to avoid the big and bulky problem of size usually for the big light ring of big target surface of cooperation.
In order to achieve the above object, the utility model provides a small portable shimmer camera lens of volume, include:
including the casing with install in casing inner chamber and a plurality of lenses that arrange in proper order, it is a plurality of correspond between the lens and be in form an optical axis in the casing, wherein, a plurality of lenses include by thing side to image side in proper order:
a first lens provided as a meniscus spherical lens having a positive refractive power, a concave surface of the first lens being disposed toward an image side;
a second lens provided as a meniscus spherical lens having a positive refractive power, a concave surface of the second lens being provided toward the image side;
a third lens provided as a biconcave spherical lens having a negative power;
a fourth lens provided as a biconvex spherical lens having a positive refractive power;
a fifth lens provided as a biconvex spherical lens having a positive refractive power;
a sixth lens provided as a meniscus spherical lens having a positive refractive power, a concave surface of the sixth lens being provided toward the image side;
a seventh lens provided as a biconcave spherical lens having a negative power;
an eighth lens provided as a biconvex spherical lens having a positive refractive power; and (c) a second step of,
a ninth lens provided as a meniscus spherical lens having a negative power, a concave surface of the ninth lens being disposed toward the object side;
the first lens and the second lens are glued into a whole.
Optionally, the plurality of lenses are made of glass; and/or the presence of a gas in the gas,
the calibers of the lenses are R, wherein R is less than or equal to 15mm; and/or the presence of a gas in the gas,
the total focal length of the micro-optical lens is 17mm.
Optionally, a diaphragm is disposed between the fifth lens and the sixth lens.
Optionally, the refractive index of the first lens is Nd1, wherein Nd1 > 2; and/or;
the refractive index of the fourth lens is Nd4, wherein Nd4 is more than 2.
Optionally, a total focal length of the micro lens is f, a focal length of the first lens is f1, a focal length of the second lens is f2, a focal length of the third lens is f3, a focal length of the fourth lens is f4, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, a focal length of the seventh lens is f7, a focal length of the eighth lens is f8, and a focal length of the ninth lens is f9, where:
1.5 sP f1/f <2.5; and/or the presence of a gas in the atmosphere,
3-n f2/f <4; and/or the presence of a gas in the atmosphere,
-1< -f3/f < -0.3; and/or the presence of a gas in the gas,
1.5< -f4/f <2.5; and/or the presence of a gas in the atmosphere,
1-n f5/f <2; and/or the presence of a gas in the gas,
1-n f6/f <2; and/or the presence of a gas in the atmosphere,
-2< -f7/f < -1; and/or the presence of a gas in the gas,
0.5-sj f8/f <1.5; and/or the presence of a gas in the gas,
-1.5<f9/f<-0.5。
optionally, the total length of the micro-lens is L, and the total focal length of the micro-lens is f, where L/f <1.6.
Optionally, the first lens has an abbe number Vd1, wherein 15 </Vd 1 </30; and/or the presence of a gas in the gas,
the second lens has an abbe number Vd2, wherein 40 & lt Vd2 & gt & lt 60 > and/or the presence of a gas in the gas,
the third lens has an abbe number Vd3, wherein 15 & lt Vd3 & gt & lt 30 > and/or the presence of a gas in the atmosphere,
the fourth lens has an abbe number Vd4, wherein 20-Vd 4-40; and/or the presence of a gas in the gas,
the fifth lens has an abbe number Vd5, wherein 35 & lt Vd5 & lt 55 > and/or the presence of a gas in the gas,
the dispersion coefficient of the sixth lens is Vd6, wherein 35< -Vd 6< -55; and/or the presence of a gas in the gas,
the seventh lens has an abbe number Vd7, wherein 50-vd7-70; and/or the presence of a gas in the atmosphere,
the dispersion coefficient of the eighth lens is Vd8, wherein 35-Vd 8-50; and/or the presence of a gas in the atmosphere,
the abbe number of the ninth lens is Vd9, wherein 15< -vd9 < -30.
Optionally, the field angle of the micro-lens is W, wherein W is larger than or equal to 49.5 degrees.
Optionally, the total optical length of the micro-lens is less than or equal to 28.7mm.
Optionally, the optical back intercept is Fb, wherein Fb ≧ 2.15mm.
The utility model provides an among the technical scheme, first lens sets up to the meniscus spherical lens who has positive focal power, the concave surface of first lens sets up towards image side, the second lens sets up to the meniscus spherical lens who has positive focal power, the concave surface of second lens sets up towards image side, through first lens and second lens are glued and are become integrative and set up, effectively correct colour difference, astigmatism and distortion. The third lens is a biconcave spherical lens with negative focal power, so that the field curvature and distortion caused by the first lens and the second lens which are integrally glued are effectively offset, and the incident light angle is corrected, so that light can smoothly enter the whole optical system, and the adjustment tolerance sensitivity of the lens is reduced. The fourth lens is a double convex spherical lens with positive focal power, the fifth lens is a double convex spherical lens with positive focal power, the sixth lens is a meniscus spherical lens with positive focal power, the concave surface of the sixth lens faces the image side, the fifth lens and the sixth lens are both set to positive focal power so as to counteract spherical aberration and coma aberration generated by other lenses with negative focal power and shorten the lens length, the seventh lens is a double concave spherical lens with negative focal power, the eighth lens is a double convex spherical lens with positive focal power, and the seventh lens and the eighth lens are negative and positive lenses to counteract aberration and reduce tolerance sensitivity. Ninth lens sets up to the crescent spherical lens of falcate that has negative focal power, the concave surface of ninth lens sets up towards the thing side, ninth lens adopts negative focal power to offset preceding remaining spherical aberration, field curvature and distortion, and the angle of emergence angle of simultaneous control chief ray with adaptation sensitization chip to improve light energy response efficiency, make the camera lens present the picture color simultaneously and evenly, the high quality imaging effect of no vignetting realizes through suitable distribution focal power, through first lens the second lens the third lens the fourth lens the fifth lens the sixth lens the seventh lens the eighth lens reaches the reasonable structure collocation of ninth lens makes the camera lens short and light and handy, portable is particularly suitable for the limited occasion of various heavy volumes.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a small-sized portable low-light-level lens provided by the present invention;
FIG. 2 is a normal temperature MTF curve of the small-sized portable micro-lens shown in FIG. 1;
FIG. 3 is a low temperature-40 ℃ MTF curve of the small-volume portable micro-optic lens of FIG. 1;
fig. 4 is a MTF graph of the small-volume portable micro-lens in fig. 1 at a high temperature of +80 ℃.
The reference numbers indicate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Small-size portable low-light- |
6 | |
| 1 | |
7 | |
| 2 | |
8 | |
| 3 | |
9 | |
| 4 | Fourth lens | a | |
| 5 | Fifth lens element |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear \8230;) are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship between the components in a specific posture (as shown in the attached drawings), the motion situation, etc., and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The low-light night vision lens is more and more widely applied to the aspects of security monitoring, military equipment, national security, submarine exploration, satellite remote sensing, biological research and the like. Because the wavelength of the micro-optical lens covers the near infrared band, the micro-optical lens is designed and matched with a large aperture, so that the micro-optical lens also has strong observation capability at night. This is also an advantage not comparable to a normal visible light lens. The large aperture, the large target surface, the small volume and the light weight of the low-light-level lens are the current market trends, but the design difficulty is also high, and the large aperture and the large size and the heavy weight are difficult to avoid in order to match the large target surface and the large aperture. In view of the not enough of prior art, the utility model provides a big light ring, shimmer camera lens of big target surface through reasonable structure collocation, makes the camera lens short and light and handy, and portable is particularly suitable for various occasions to the weight volume is limited.
The utility model provides a portable shimmer camera lens of little volume, wherein, figure 1 is the utility model provides a structural schematic of the portable shimmer camera lens of little volume's embodiment.
Referring to fig. 1, the small-volume portable micro-lens 100 includes a housing and a plurality of lenses sequentially disposed in an inner cavity of the housing, wherein the plurality of lenses correspondingly form an optical axis in the housing, the plurality of lenses sequentially includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, and a ninth lens 9 from an object side to an image side, the first lens 1 is a meniscus spherical lens with positive focal power, a concave surface of the first lens 1 faces the image side, the second lens 2 is a meniscus spherical lens with positive focal power, a concave surface of the second lens 2 faces the image side, the third lens element 3 is a biconcave spherical lens with negative refractive power, the fourth lens element 4 is a biconvex spherical lens with positive refractive power, the fifth lens element 5 is a biconvex spherical lens with positive refractive power, the sixth lens element 6 is a meniscus spherical lens with positive refractive power, the concave surface of the sixth lens element 6 faces the image side, the seventh lens element 7 is a biconcave spherical lens with negative refractive power, the eighth lens element 8 is a biconvex spherical lens with positive refractive power, the ninth lens element 9 is a meniscus spherical lens with negative refractive power, the concave surface of the ninth lens element 9 faces the object side, and the first lens element 1 and the second lens element 2 are integrally bonded.
The utility model provides an among the technical scheme, first lens 1 sets up to the falcate spherical lens who has positive focal power, first lens 1's concave surface sets up towards picture side, second lens 2 sets up to the falcate spherical lens who has positive focal power, second lens 2's concave surface sets up towards picture side, through first lens 1 and 2 synthetic integrative settings of gluing of second lens effectively correct colour difference, astigmatism and distortion. The third lens 3 is a biconcave spherical lens with negative focal power, so that the field curvature and distortion caused by the first lens 1 and the second lens 2 which are integrally glued are effectively offset, and the incident light angle is corrected, so that light can smoothly enter the whole optical system, and the sensitivity of the lens to the adjustment tolerance is reduced. The fourth lens 4 is a double convex spherical lens with positive focal power, the fifth lens 5 is a double convex spherical lens with positive focal power, the sixth lens 6 is a meniscus spherical lens with positive focal power, the concave surface of the sixth lens 6 is arranged towards the image side, the fifth lens 5 and the sixth lens 6 are both set with positive focal power to counteract the spherical aberration and the coma aberration generated by other lenses with negative focal power and shorten the lens length, the seventh lens 7 is a double concave spherical lens with negative focal power, the eighth lens 8 is a double convex spherical lens with positive focal power, and the seventh lens 7 and the eighth lens 8 are a negative-positive lens to counteract the aberration and reduce the sensitivity tolerance. The ninth lens 9 is a meniscus spherical lens with negative focal power, the concave surface of the ninth lens 9 is arranged towards the object side, the ninth lens 9 adopts negative focal power to offset the residual spherical aberration, curvature of field and distortion in front, and simultaneously controls the emergence angle of the chief ray to adapt to the angle of the photosensitive chip, so that the luminous energy response efficiency is improved, the lens presents high-quality imaging effects with uniform picture color and no dark angle, and the lens is short, light and handy through reasonable structural collocation of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8 and the ninth lens 9 by properly distributing the focal power, is convenient to carry, and is particularly suitable for various occasions with restrictions on the weight volume.
It should be noted that the basic parameter table of the small-sized portable micro lens 100 in the present embodiment is shown in table 1, where the curvature radius and the thickness unit are millimeters (mm).
TABLE 1
| Surface number | Surface type | Radius of curvature | Thickness of | Refractive index | Abbe number |
| S1 | Spherical surface | 14.3 | 2.1 | 2.0 | 25.4 |
| S2 | Spherical surface | 24.1 | 1.2 | 1.77 | 49.6 |
| S3 | Spherical surface | 47.1 | 1.6 | ||
| S4 | Spherical surface | -24.9 | 1.5 | 1.95 | 17.9 |
| S5 | Spherical surface | 23.1 | 0.7 | ||
| S6 | Spherical surface | 40.6 | 2.4 | 2.0 | 28.4 |
| S7 | Spherical surface | -153.5 | 0.4 | ||
| S8 | Spherical surface | 111.8 | 1.7 | 1.82 | 46.6 |
| S9 | Spherical surface | -26.1 | 0.15 | ||
| S10 | Diaphragm | INFINITY | 0.3 | ||
| S11 | Spherical surface | 18.8 | 4.7 | 1.82 | 46.6 |
| S12 | Spherical surface | 146.9 | 0.4 | ||
| S13 | Spherical surface | -157.8 | 1.6 | 1.52 | 64.2 |
| S14 | Spherical surface | 12.4 | 0.8 | ||
| S15 | Spherical surface | 22.3 | 4.1 | 1.8 | 46.8 |
| S16 | Spherical surface | -50.6 | 2.2 | ||
| S17 | Spherical surface | -9.58 | 0.7 | ||
| S18 | Spherical surface | -28.6 | 2.15 | 1.81 | 22.7 |
| S19 | Spherical surface | INFINITY |
Specifically, the plurality of lenses may be made of various materials, for example, the lenses may be made of plastic or glass, and specifically, in an embodiment of the present application, the plurality of lenses all include glass, so that the small-size portable micro-optical lens 100 is suitable for an occasion with a relatively high overall performance requirement, for example, may be applied to military products (for example, may be widely used in security monitoring, military equipment, national security, submarine exploration, satellite remote sensing, biological research, and the like), and in addition, in combination with thermal parameters of the glass material, the aberration may be well corrected and the thermal effect generated by the structure may be offset, so that the small-size portable micro-optical lens 100 may clearly image in an environment of-40 ℃ to +80 ℃, and the application in different temperature environments may be satisfied.
Furthermore, the aperture of the plurality of lenses is R, wherein R is less than or equal to 15mm, and the arrangement is such that the volume of the low-light-level lens 100 is small and the carrying is convenient.
Further, the total focal length of the micro-lens 100 is 17mm, and the micro-lens 100 is small in size and convenient to carry.
Specifically, referring to fig. 1, a diaphragm a is disposed between the fifth lens 5 and the sixth lens 6, and is configured such that apertures of the lenses are uniform along an optical axis direction, so as to reduce the volume of the micro optical lens 100 to some extent.
Specifically, the refractive index of the first lens 1 is Nd1, wherein Nd1 > 2, and the arrangement is such that the first lens 1 has a higher refractive index, which can effectively shorten the total length of the lens and miniaturize the system.
Specifically, the refractive index of the fourth lens 4 is Nd4, wherein Nd4 > 2, and the fourth lens 4 has a higher refractive index, so that the total lens length can be effectively shortened, and the system can be miniaturized.
It should be noted that the characteristics of the first lens element 1 and the fourth lens element 4 may be satisfied at the same time, or alternatively, and when both are satisfied at the same time, the total length of the lens is shortened to the maximum extent, so that the system is miniaturized, and the effect is the best.
Specifically, in order to enable the spherical lenses to cooperate with each other to achieve the desired effect, in this embodiment, the total focal length of the micro-optic lens 100 is f, the focal length of the first lens 1 is f1, the focal length of the second lens 2 is f2, the focal length of the third lens 3 is f3, the focal length of the fourth lens 4 is f4, the focal length of the fifth lens 5 is f5, the focal length of the sixth lens 6 is f6, the focal length of the seventh lens 7 is f7, the focal length of the eighth lens 8 is f8, and the focal length of the ninth lens 9 is f9, where: 1.5 sP f1/f <2.5; and/or, 3-woven fabric f2/f <4; and/or-1 < -f3/f < -0.3; and/or, 1.5 are woven fabric f4/f <2.5; and/or 1< -f5/f <2; and/or 1< -f6/f <2; and/or-2-woven fabric f7/f < -1; and/or, 0.5 are woven fabric f8/f <1.5; and/or-1.5-woven fabric f9/f < -0.5.
Specifically, in order to make the scene that portable shimmer lens 100 of small volume can be suitable for is more, in this embodiment, shimmer lens 100's total length is L, shimmer lens 100's total focal length is f, and wherein, L/f <1.6, so setting up satisfies the miniaturized trend of camera lens, can satisfy military requirement, also can satisfy daily portable demand.
Further, the first lens 1 has an abbe number Vd1, wherein 15 straw vd1 is constructed from straw 30; and/or the second lens 2 has an abbe number Vd2, wherein 40-straw vd2-straw 60; and/or the third lens 3 has an abbe number Vd3, wherein 15 & lt 3 & gt & lt 30 & gt are constructed on the basis of the three-dimensional structure; and/or the fourth lens 4 has an abbe number Vd4, wherein 20-straw vd4-straw 40; and/or the fifth lens 5 has an abbe number Vd5, wherein 35 is constructed from over vd5 and over 55; and/or the abbe number of the sixth lens 6 is Vd6, wherein 35< -Vd 6< -55; and/or the seventh lens 7 has an abbe number Vd7, wherein 50 is constructed from within vd7 to 70; and/or the eighth lens 8 has an abbe number Vd8, wherein 35< -vd8 < -50; and/or the abbe number of the ninth lens 9 is Vd9, wherein 15 & ltd & gt vd9 & lt 30 & gt are set so that the chromatic dispersion of the small-volume portable micro-optical lens 100 is not obvious and the imaging quality of the lens is good.
It should be noted that, in the embodiment of the present application, by appropriately distributing the optical power, glass with a refractive index Nd > 1.7 is basically adopted, because the higher the refractive index of the glass is, the faster the focusing is, the shorter the lens length is, and the smaller the volume is, and at the same time, the seventh lens 7 is made of low-refractive-index high-dispersion glass (Vd 7> 60) to counteract the chromatic aberration caused by the high-refractive-index glass (the chromatic aberration is caused by the glass material, and can also be corrected by the shape of the glass mentioned above). Under the condition that the length is reduced by selecting the glass with high refractive index as much as possible, the thermal expansion coefficient of the selected glass material is basically less than 7, and compared with the materials with the thermal expansion coefficients of other glass materials being more than 8, more than 9 or even more than 10, the smaller the thermal expansion coefficient is, the smaller the thermal expansion deformation at high and low temperatures is, not only can the aberration caused by the change of the glass surface shape be reduced, but also the thermal effect generated by the structural component can be reduced, thereby realizing the effect of clear imaging at 40 ℃ to +80 ℃.
Specifically, the field angle of the micro-lens 100 is W, wherein W is larger than or equal to 49.5 degrees, and the arrangement is such that the small-size portable micro-lens 100 has a larger field range.
Specifically, in the embodiment of the present application, the total optical length of the micro-lens 100 is less than or equal to 28.7mm, and the arrangement is such that the small-size portable micro-lens 100 is small in size and convenient to carry.
Specifically, in the embodiment of the application, the optical back intercept is Fb, wherein Fb is more than or equal to 2.15mm, and the arrangement provides space for the installation of a subsequent chip.
It should be noted that, in the present application, the small-sized portable low-light level lens 100 has a large aperture, F/#isnot greater than 1.25, the aperture of the small-sized portable low-light level lens 100 is increased to make it more adaptive to an environment with insufficient light so that a brighter picture can be presented at night, a plurality of lenses all adopt spherical surfaces, are not aspheric surfaces, are controlled at low cost, improve the yield of finished products, ensure the high reliability of products, and make them reach military standards, the total lens length of the small-sized portable low-light level lens 100 is controlled to be very short, the lens length/focal length is less than 1.6, the total weight of the plurality of lenses is less than 10g, the maximum aperture is 15mm, the size is small, the imaging circle diameter of the small-sized portable low-light level lens 100 is phi, wherein phi is greater than 16mm, the F-Tan distortion of the small-sized low-light level lens 100 is not greater than 3.2%, in addition, the small-sized low-light level lens 100 can work under the band work of the spectral range 600 nm-1000 nm,
in addition, fig. 2 to fig. 4 are MTF graphs of the small-and-medium-sized micro-optic lens 100 at normal temperature, low temperature of-40 ℃ and high temperature of +80 ℃ respectively, and it can be seen from the graphs that MTF is not less than 0.3 in 0.8 field of view at 50lp at normal temperature, the imaging quality is high, the performance difference of various temperature states is not large, the consistency is good, and high and low temperature imaging can be achieved while the imaging is clear without focusing.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a portable shimmer camera lens of little volume which characterized in that, includes the casing with install in casing inner chamber and a plurality of lenses that arrange in proper order, it is a plurality of correspond between the lens in form an optical axis in the casing, wherein, a plurality of lenses include by thing side to image side in proper order:
a first lens provided as a meniscus spherical lens having a positive power, a concave surface of the first lens being provided toward an image side;
a second lens provided as a meniscus spherical lens having a positive refractive power, a concave surface of the second lens being provided toward the image side;
a third lens provided as a biconcave spherical lens having a negative refractive power;
a fourth lens provided as a biconvex spherical lens having a positive refractive power;
a fifth lens provided as a biconvex spherical lens having a positive refractive power;
a sixth lens provided as a meniscus spherical lens having a positive refractive power, a concave surface of the sixth lens being provided toward the image side;
a seventh lens provided as a biconcave spherical lens having a negative power;
an eighth lens provided as a biconvex spherical lens having a positive refractive power; and (c) a second step of,
a ninth lens provided as a meniscus spherical lens having a negative power, a concave surface of the ninth lens being disposed toward the object side;
the first lens and the second lens are glued into a whole.
2. A small volume portable micro-optic lens as claimed in claim 1, wherein the plurality of lenses are made of glass; and/or the presence of a gas in the atmosphere,
the calibers of the lenses are R, wherein R is less than or equal to 15mm; and/or the presence of a gas in the gas,
the total focal length of the micro-optical lens is 17mm.
3. A small volume portable micro lens unit as claimed in claim 1, wherein a diaphragm is disposed between the fifth lens and the sixth lens.
4. A small-volume portable micro-optic lens as claimed in claim 1, wherein the first lens has a refractive index Nd1, wherein Nd1 > 2; and/or;
the refractive index of the fourth lens is Nd4, wherein Nd4 is larger than 2.
5. A small-sized portable micro-lens as claimed in claim 1, wherein the micro-lens has a total focal length f, the first lens has a focal length f1, the second lens has a focal length f2, the third lens has a focal length f3, the fourth lens has a focal length f4, the fifth lens has a focal length f5, the sixth lens has a focal length f6, the seventh lens has a focal length f7, the eighth lens has a focal length f8, and the ninth lens has a focal length f9, wherein:
1.5 sP f1/f <2.5; and/or the presence of a gas in the gas,
3-n f2/f <4; and/or the presence of a gas in the atmosphere,
-1< -f3/f < -0.3; and/or the presence of a gas in the atmosphere,
1.5< -f4/f <2.5; and/or the presence of a gas in the atmosphere,
1-n f5/f <2; and/or the presence of a gas in the gas,
1< -f6/f <2; and/or the presence of a gas in the atmosphere,
-2< -f7/f < -1; and/or the presence of a gas in the gas,
0.5-sj f8/f <1.5; and/or the presence of a gas in the gas,
-1.5<f9/f<-0.5。
6. a small volume portable micro-lens as claimed in claim 1, wherein the micro-lens has a total length of L and a total focal length of f, wherein L/f <1.6.
7. A small-volume portable micro-optic lens as claimed in claim 1, wherein the first lens has an abbe number Vd1, wherein 15-vd1-30; and/or the presence of a gas in the atmosphere,
the second lens has an abbe number Vd2, wherein 40 & lt Vd2 & gt & lt 60 > and/or the presence of a gas in the atmosphere,
the third lens has an abbe number Vd3, wherein 15 & lt Vd3 & gt & lt 30 > and/or the presence of a gas in the atmosphere,
the fourth lens has an abbe number Vd4, wherein 20 & lt Vd4 & lt 40 > and/or the presence of a gas in the gas,
the fifth lens has an abbe number Vd5, wherein 35< -Vd 5< -55; and/or the presence of a gas in the gas,
the dispersion coefficient of the sixth lens is Vd6, wherein 35< -Vd 6< -55; and/or the presence of a gas in the gas,
the seventh lens has an abbe number Vd7, wherein 50-vd7-70; and/or the presence of a gas in the gas,
the dispersion coefficient of the eighth lens is Vd8, wherein 35-Vd 8-50; and/or the presence of a gas in the gas,
the abbe number of the ninth lens is Vd9, wherein 15< -vd9 < -30.
8. A small-volume portable micro-lens as claimed in claim 1, wherein the micro-lens has a field angle W, wherein W ≧ 49.5 °.
9. A small volume portable micro-lens as claimed in claim 1, wherein the total optical length of the micro-lens is 28.7mm or less.
10. A small-volume portable micro-optic lens as claimed in claim 1, wherein the optical back intercept is Fb, wherein Fb ≧ 2.15mm.
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| CN202221549844.8U CN217846757U (en) | 2022-06-20 | 2022-06-20 | Small-size portable low-light-level lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221549844.8U CN217846757U (en) | 2022-06-20 | 2022-06-20 | Small-size portable low-light-level lens |
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| CN217846757U true CN217846757U (en) | 2022-11-18 |
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| CN202221549844.8U Active CN217846757U (en) | 2022-06-20 | 2022-06-20 | Small-size portable low-light-level lens |
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