CN117970617B - High-zoom-ratio zoom objective lens and optical system - Google Patents
High-zoom-ratio zoom objective lens and optical system Download PDFInfo
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Abstract
The invention provides a high-zoom-ratio zoom objective lens and an optical system, which relate to the technical field of optical imaging and comprise an objective lens group and a zoom group which are sequentially arranged from an object side to an image side along an optical axis, wherein the objective lens group comprises a first lens, a second lens, a third lens and a fourth lens, and the objective lens group and the zoom group are sequentially arranged from the object side to the image side along the optical axis; the zoom group comprises a field lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and a glass plate, and the zoom group is sequentially arranged from an object side to an image side along an optical axis; the high-zoom-ratio zoom objective lens satisfies the following conditional expression: f 1<45.17;8.17＜F2 is more than or equal to 44.00 and less than 460.27; EFL is more than 6.89 and less than 41.13; EFL of 0.44Tan (FOV) is less than or equal to 2.59; where F 1 denotes a focal length of the objective lens group, F 2 denotes a focal length of the zoom lens group, EFL denotes an effective focal length of the high-zoom-ratio zoom objective lens, and FOV denotes a full field angle of the high-zoom-ratio zoom objective lens. The invention is helpful for reducing lens distortion of the high-zoom-ratio zoom objective lens under various zoom magnifications.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to a high-zoom-ratio zoom objective lens and an optical system.
Background
With the continuous development of technology, the optical design and manufacturing technology of the zoom objective lens are also improved remarkably. Modern zoom objectives have a wider focal length range, lower chromatic and aberration, and higher light transmittance, thereby being able to provide more accurate and clear imaging effects. These improvements have led to a wide range of applications for zoom objectives in the fields of scientific research, industrial detection, medical diagnostics, etc. Compared with the traditional objective lens, the zoom objective lens has better flexibility and diversity, and can adapt to different observation requirements.
Chinese patent publication No. CN117170075A discloses a surgical microscope continuous zoom large objective system, in which a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and a sixth lens 6 are sequentially arranged along an optical axis from an image side surface to an object side surface; the first lens group G1 and the second lens group G2 are combined to form a first lens group G1, the third lens group 3 and the fourth lens group 4 are combined to form a second lens group G2, the fifth lens group 5 and the sixth lens group 6 are combined to form a third lens group G3, the first lens group G1, the second lens group G2 and the third lens group G3 are combined to form an objective lens system, the positions of the first lens group G1 and the second lens group G2 are fixed, and the first lens group G1 and the second lens group G2 relatively move relative to the third lens group G3 along an optical axis so as to realize focal length change, so that the objective lens system realizes large zoom ratio. However, the zoom objective system provided by the above scheme is difficult to consider performance indexes under various magnifications, and serious distortion of the zoom objective under a certain zoom magnification often occurs, so that poor imaging quality is caused.
Disclosure of Invention
In view of this, the present invention provides a high-magnification-ratio zoom objective lens and an optical system, which can effectively reduce lens distortion of the high-magnification-ratio zoom objective lens at each zoom magnification by reasonably configuring refractive powers of ten lenses in the high-magnification-ratio zoom objective lens and limiting a relationship between a focal length variation range of each group and an effective focal length and a full field angle of the high-magnification-ratio zoom objective lens.
In order to achieve the above object, the present invention provides, in a first aspect, a high-magnification-ratio zoom objective lens including an objective lens group and a magnification-varying group disposed in this order from an object side to an image side along an optical axis, wherein,
The objective lens group comprises a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power and a fourth lens with positive refractive power, and the first lens, the second lens, the third lens and the fourth lens are sequentially arranged from an object side to an image side along an optical axis;
the variable power group comprises a field lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, a seventh lens with negative refractive power, an eighth lens with positive refractive power, a ninth lens with negative refractive power, a tenth lens with negative refractive power and a glass plate, wherein the field lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the glass plate are sequentially arranged from an object side to an image side along an optical axis;
the Gao Bianbei-ratio zoom objective lens meets the following conditional expression:
44.00≤F1<45.17；
8.17≤F2≤460.27；
6.89＜EFL＜41.13；
；
Wherein F 1 denotes a focal length of the objective lens group, F 2 denotes a focal length of the zoom lens group, EFL denotes an effective focal length of the Gao Bianbei-ratio zoom objective lens, and FOV denotes a full field angle of the Gao Bianbei-ratio zoom objective lens.
On the basis of the above technical solution, preferably, the object-side paraxial region of the first lens element is convex, the image-side paraxial region of the first lens element is convex, the object-side paraxial region of the second lens element is concave, the image-side paraxial region of the second lens element is convex, the object-side paraxial region of the third lens element is convex, the image-side paraxial region of the third lens element is concave, the object-side paraxial region of the fourth lens element is convex, the image-side paraxial region of the fourth lens element is concave, the object-side paraxial region of the field lens element is convex, the image-side paraxial region of the field lens element is convex, the object-side paraxial region of the fifth lens element is convex, the image-side paraxial region of the fifth lens element is concave, the object-side paraxial region of the sixth lens element is convex, the image-side paraxial region of the sixth lens element is convex, the object-side paraxial region of the seventh lens element is convex, the image-side paraxial region of the seventh lens element is concave, the object-side paraxial region of the eighth lens element is convex, the image-side paraxial region of the eighth lens element is convex, the object-side paraxial region of the ninth lens element is concave, the image-side paraxial region of the ninth lens element is convex, the object-side paraxial region of the tenth lens element is concave, the image-side paraxial region of the tenth lens element is concave, and the object-side paraxial region of the eleventh lens element is concave.
On the basis of the above technical solution, preferably, the first lens and the second lens form a first cemented lens, the fifth lens and the sixth lens form a second cemented lens, the seventh lens and the eighth lens form a third cemented lens, and the ninth lens and the tenth lens form a fourth cemented lens.
Still further preferably, the Gao Bianbei ratio zoom objective satisfies the following conditional expression:
3.21≤T1≤53.69；
7.05≤T2≤14.65；
7.35≤T3≤50.23；
Wherein T 1 represents a variable pitch between the field lens and the second cemented lens, T 2 represents a variable pitch between the second cemented lens and the third cemented lens, and T 3 represents a variable pitch between the third cemented lens and the fourth cemented lens.
Still further preferably, the Gao Bianbei ratio zoom objective also satisfies the following conditional expression:
0.99<|EFL/F1|+|EFL/F2|<1.00
Wherein F 1 denotes a focal length of the objective lens group, F 2 denotes a focal length of the zoom lens group, and EFL denotes an effective focal length of the Gao Bianbei-ratio zoom objective lens.
Still further preferably, the Gao Bianbei ratio zoom objective lens has a total optical length of the Gao Bianbei ratio zoom objective lens and an effective focal length of the Gao Bianbei ratio zoom objective lens under low magnification zoom, which satisfy the following conditions:
23.32≤TTL/Fl≤23.76
Wherein TTL represents the optical total length of the Gao Bianbei-fold zoom objective lens, and F l represents the effective focal length of the Gao Bianbei-fold zoom objective lens under low-magnification zoom.
Still further preferably, the Gao Bianbei ratio zoom objective lens has an optical total length of the Gao Bianbei ratio zoom objective lens and an effective focal length of the Gao Bianbei ratio zoom objective lens under high magnification zoom, which satisfy the following conditions:
0.41≤TTL/Fh≤0.42
wherein TTL represents the optical total length of the Gao Bianbei-fold zoom objective lens, and F h represents the effective focal length of the Gao Bianbei-fold zoom objective lens under high-magnification zoom.
Still further preferably, the Gao Bianbei ratio zoom objective also satisfies the following conditional expression:
-1.29≤(R31+R32)/(R31-R32)≤-1.28；
-2.94≤(R41+R42)/(R41-R42)≤-2.84；
wherein R31 is a radius of curvature of the object-side surface in the third lens element, R32 is a radius of curvature of the image-side surface in the third lens element, R41 is a radius of curvature of the object-side surface in the fourth lens element, and R42 is a radius of curvature of the image-side surface in the fourth lens element.
Still further preferably, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens.
In a second aspect, the present invention discloses an optical system comprising a high-magnification-ratio zoom objective lens as described in the first aspect above.
Compared with the prior art, the high-zoom-ratio zoom objective lens has the following beneficial effects:
(1) The refractive power of ten lenses in the high-zoom-ratio zoom objective lens is reasonably configured, and the focal length variation range of each group is limited, so that the integral structure of the high-zoom-ratio zoom objective lens is optimized, the situation that the surface type of part of the lens groups is excessively bent and the edges of the lenses are overlapped is avoided as much as possible, the edge view field of the high-zoom-ratio zoom objective lens and the lens distortion under each zoom magnification are optimized, the problem that the light rays of a large view field cannot enter the zoom group after exiting the objective lens group due to overlarge intervals of part of the lens groups can be avoided, the imaging quality of the whole image surface is improved, and meanwhile, the relation formula of the effective focal length and the full view angle of the high-zoom-ratio zoom objective lens is limited Ensuring that the high-zoom-ratio zoom objective lens keeps a good view field in the zooming process;
(2) When the focal length of the third lens in the high-zoom-ratio zoom objective lens, the focal length of the fourth lens and the effective focal length of the high-zoom-ratio zoom objective lens meet 0.99< |EFL/F 1|+|EFL/F2 | <1.00, the total length of the high-zoom-ratio zoom objective lens is favorably shortened, meanwhile, the refractive powers of the third lens and the fourth lens are proper, the high-zoom-ratio zoom objective lens can enhance the zoom effect, meanwhile, the curvature radiuses of the third lens and the fourth lens meet-1.30 < -1.29 > (R31+R32)/(R31-R32) < 1.29 and-2.92 < -1.41+R42)/(R41-R42) < 2.84, the relation between the object side surfaces of the third lens and the fourth lens and the curvature radiuses of the image side surfaces at the optical axis can be reasonably configured, the shapes of the third lens and the fourth lens can be favorably configured, the optical deflection angles borne by the third lens and the fourth lens in the high-zoom-ratio zoom objective lens can be reasonably distributed, the high-ratio zoom lens can be favorably reduced, the aberration of the high-ratio zoom lens can be favorably improved, and the aberration of the image-quality of the third lens and the fourth lens can be favorably improved, and the imaging quality of the object lens can be favorably improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high-zoom-ratio zoom objective lens under low-zoom;
FIG. 2 is an astigmatic distortion graph of a high-zoom-ratio zoom objective lens provided by the invention under low-zoom;
FIG. 3 is a schematic diagram of a transfer function curve of the high-zoom-ratio zoom objective lens under low-zoom;
FIG. 4 is a lens array diagram of the high-zoom-ratio zoom objective lens provided by the invention under low-zoom;
FIG. 5 is a schematic structural diagram of the high-magnification zoom objective lens under high-magnification zoom;
FIG. 6 is a graph of astigmatic distortion of a high magnification zoom objective lens according to the present invention at high magnification zoom;
FIG. 7 is a schematic diagram of a transfer function curve of the high-magnification zoom objective lens under high-magnification zoom;
fig. 8 is a lens array diagram of the high-magnification zoom objective lens under high-magnification zoom.
Reference numerals illustrate: 1. an objective lens group; 11. a first lens; 12. a second lens; 13. a third lens; 14. a fourth lens; 2. a zoom group; 21. a field lens; 22. a fifth lens; 23. a sixth lens; 24. a seventh lens; 25. an eighth lens; 26. a ninth lens; 27. a tenth lens; 28. a glass plate.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
The present invention provides a high-magnification-ratio zoom objective lens, as shown in fig. 1 and 5, comprising a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a field lens 21, a fifth lens 22, a sixth lens 23, a seventh lens 24, an eighth lens 25, a ninth lens 26, a tenth lens 27, and a glass plate 28, which are sequentially arranged from an object side to an image side along an optical axis, wherein an objective lens group 1 is composed of the first lens 11, the second lens 12, the third lens 13, and the fourth lens 14, which are sequentially arranged from the object side to the image side along the optical axis; the magnification-varying group 2 is composed of a field lens 21, a fifth lens 22, a sixth lens 23, a seventh lens 24, an eighth lens 25, a ninth lens 26, a tenth lens 27, and a glass plate 28, which are disposed in this order from the object side to the image side along the optical axis.
The objective lens group 1 includes four lens elements with refractive power, in order from an object side to an image side along an optical axis:
The first lens element 11 with positive refractive power, wherein an object-side paraxial region of the first lens element 11 is convex and an image-side paraxial region of the first lens element 11 is convex;
a second lens element 12 with negative refractive power having a concave object-side paraxial region of the second lens element 12 and a convex image-side paraxial region of the second lens element 12;
The third lens element 13 with positive refractive power, wherein an object-side paraxial region of the third lens element 13 is convex and an image-side paraxial region of the third lens element 13 is concave;
the fourth lens element 14 with positive refractive power has a convex object-side paraxial region of the fourth lens element 14 and a concave image-side paraxial region of the fourth lens element 14;
By reasonably configuring the refractive powers of four lenses in the high-magnification-ratio zoom lens, namely, setting the first lens element 1 with positive refractive power and setting the second lens element 2 with negative refractive power, and combining two positive and negative lens elements, the on-axis spherical aberration of the high-magnification-ratio zoom lens can be corrected, meanwhile, due to the design that the object side surface and the image side surface of the first lens element 11 are both convex at the paraxial region, the light entering the first lens element 11 can be compressed, so that the incident light is gently transited to improve the relative illuminance of the high-magnification-ratio zoom lens element, and the central and edge view field light are effectively converged, thereby correcting the edge aberration, and the object side surface and the image side surface of the second lens element 12 are respectively concave and convex at the paraxial region, so as to shorten the focal length of the high-magnification-ratio zoom lens element, and facilitate the incident light with a large angle to enter the high-magnification-ratio zoom lens element, the expansion of the angle of view of the high-zoom-ratio zoom objective lens can lead the transition of incident light to be more gentle, can effectively correct the aberration generated by the high-zoom-ratio zoom objective lens and reduce distortion while improving the relative illuminance of the high-zoom-ratio zoom objective lens, thereby improving the imaging definition of the high-zoom-ratio zoom objective lens, improving the imaging quality of the high-zoom-ratio zoom objective lens, being beneficial to enhancing the positive refractive power of the third lens 13 due to the design that the object side surface and the image side surface of the third lens 13 are respectively convex and concave at the paraxial region, being beneficial to reasonably restricting the surface shape of the third lens 13, reducing the tolerance sensitivity and the stray light risk of the third lens 13 and being beneficial to correcting the distortion of the high-zoom-ratio zoom objective lens due to the design that the object side surface and the image side surface of the third lens 13 are respectively convex and concave at the paraxial region, because the object side surface and the image side surface of the third lens element 13 are convex at the paraxial region, the light rays collected by the first lens element 11 and the second lens element 12 can be compressed, so that the incident light rays are smoothly transited, the relative illuminance of the high-zoom-ratio zoom objective lens is improved, the central and edge view field light rays are effectively converged, the astigmatism of the high-zoom-ratio zoom objective lens can be corrected, and the second lens element 2, the third lens element 3 and the fourth lens element 4 are convex-concave lenses, and the overall length of the high-zoom-ratio zoom objective lens can be shortened.
Six lenses with refractive power in total in the variable magnification group 2 sequentially comprise, from an object side to an image side along an optical axis:
A field lens 21 with positive refractive power, wherein an object-side paraxial region of the field lens 21 is convex, and an image-side paraxial region of the field lens 21 is convex;
A fifth lens element 22 with negative refractive power having a convex object-side paraxial region of the fifth lens element 22 and a concave image-side paraxial region of the fifth lens element 22;
A sixth lens element 23 with positive refractive power, wherein an object-side paraxial region of the sixth lens element 23 is convex and an image-side paraxial region of the sixth lens element 23 is convex;
A seventh lens element 24 with negative refractive power having a convex object-side paraxial region of the seventh lens element 24 and a concave image-side paraxial region of the seventh lens element 24;
An eighth lens element 25 with positive refractive power, wherein the object-side surface of the eighth lens element 25 is convex at the paraxial region thereof, and the image-side surface of the eighth lens element 25 is convex at the paraxial region thereof;
a ninth lens element 26 with negative refractive power having a concave object-side paraxial region and a convex image-side paraxial region of the ninth lens element 26;
A tenth lens element 27 with negative refractive power, wherein an object-side paraxial region of the tenth lens element 27 is concave, and an image-side paraxial region of the tenth lens element 27 is concave; and
A glass plate 28.
The fifth lens element 22 with negative refractive power is beneficial to converging the marginal field light rays, so that the converged light rays smoothly enter the rear-end high-magnification-ratio zoom objective lens. The sixth lens element 23 with positive refractive power is beneficial to converging light and reducing the light deflection angle, so as to make the light trend transition smoothly. The seventh lens element 24 may have negative refractive power for converging edge field light rays. The eighth lens element 25 with positive refractive power is beneficial to suppressing the angle of incidence of the marginal field of view on the imaging surface, and effectively transmitting more light beams to the imaging surface, thereby improving the imaging quality of the high-magnification-ratio zoom objective lens. The eighth lens 25 can have a convex-concave shape, which is beneficial to improving the relative illumination of the marginal field of view and avoiding the generation of dark angles, thereby improving the imaging quality of the high-transformation-ratio zoom objective lens. The ninth lens element 26 with negative refractive power is beneficial to increasing the imaging area of the high-magnification-ratio zoom lens and balancing various aberrations generated by the eighth lens element 25, thereby improving the imaging quality of the high-magnification-ratio zoom lens. The tenth lens element 27 with negative refractive power has a concave-concave shape, which is beneficial to smooth light beam traveling and to correct astigmatism, field curvature and other aberrations.
The distance between the field lens 21 and the second cemented lens, the distance between the second cemented lens and the third cemented lens and the distance between the third cemented lens and the fourth cemented lens are adjusted to realize continuous magnification with the magnification ratio of 6 times in the high-magnification-ratio zoom lens and simultaneously have higher vertical axis magnification, the high magnification ratio of the medium-magnification-ratio zoom lens 2 enables the objective lens group 1 to select a relatively smaller focal length when the continuous magnification of 1-6 times is realized, and meanwhile, the positive refractive power zoom structure enables the whole structure of the aiming lens to be compact, and reasonable distribution of refractive power enables all magnifications of the high-magnification-ratio zoom lens and higher image quality under a field of view.
In the present embodiment, the first lens 11 and the second lens 12 constitute a first cemented lens, the fifth lens 22 and the sixth lens 23 constitute a second cemented lens, the seventh lens 24 and the eighth lens 25 constitute a third cemented lens, and the ninth lens 26 and the tenth lens 27 constitute a fourth cemented lens. The chromatic aberration of the high-zoom-ratio zoom objective lens can be effectively corrected, the eccentric sensitivity of the high-zoom-ratio zoom objective lens can be reduced, the aberration of the high-zoom-ratio zoom objective lens can be balanced, and the imaging quality of the high-zoom-ratio zoom objective lens can be improved; the assembling sensitivity of the high-zoom-ratio zoom objective lens can be reduced, the processing technology difficulty of the high-zoom-ratio zoom objective lens is further reduced, and the assembling yield of the high-zoom-ratio zoom objective lens is improved.
In this embodiment, the focal lengths of the respective groups in the high-zoom-ratio zoom objective lens satisfy the following conditions:
44.00≤F1<45.17；
8.17≤F2≤460.27；
6.89＜EFL＜41.13；
；
Where F 1 denotes a focal length of the objective lens group 1, F 2 denotes a focal length of the zoom lens group 2, EFL denotes an effective focal length of the high-zoom-ratio zoom objective lens, and FOV denotes a full field angle of the high-zoom-ratio zoom objective lens.
The focal length variation range of each group is limited, so that the integral structure of the high-zoom-ratio zoom objective lens is optimized, the situation that the surface type of part of the lens groups is excessively bent and the edges of the lenses are overlapped is avoided as much as possible, the edge view field of the high-zoom-ratio zoom objective lens and the lens distortion under each zoom magnification are optimized, and meanwhile, the problem that light rays with large view fields cannot enter the zoom groups after exiting from the objective lens groups due to overlarge intervals of part of the lens groups can be avoided, and the imaging quality of the whole image surface is improved. In addition, by defining the relation between the effective focal length and the field angle, the high-zoom-ratio zoom objective lens is ensured to maintain a good field of view during zooming.
In this embodiment, the high-magnification-ratio zoom objective lens also satisfies:
3.21≤T1≤53.69
7.05≤T2≤14.65
7.35≤T3≤50.23
Wherein T 1 denotes a variable pitch between the field lens 21 and the second cemented lens, T 2 denotes a variable pitch between the second cemented lens and the third cemented lens, and T 3 denotes a variable pitch between the third cemented lens and the fourth cemented lens.
In the present embodiment, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 22, the sixth lens 23, the seventh lens 24, the eighth lens 25, the ninth lens 26, and the tenth lens 27 are spherical lenses. The spherical lens is a rotationally symmetrical optical element, the distance between the curvature radius and the geometric center is constant, the lens parameters are constant on the whole surface, and the spherical lens has the cost advantage of economy in the aspect of processing and manufacturing, so that the cost of the high-zoom-ratio zoom objective lens is reduced, and meanwhile, the assembling difficulty of the high-zoom-ratio zoom objective lens is also reduced due to the fact that the spherical lens parameters are uniform.
The high-zoom-ratio zoom objective lens also satisfies the following conditional expression:
0.99<|EFL/F1|+|EFL/F2|<1.00
Where F 1 denotes a focal length of the objective lens group (1), F 2 denotes a focal length of the zoom lens group (2), and EFL denotes an effective focal length of the high-zoom-ratio zoom objective lens.
In this embodiment, the optical total length of the high-magnification-ratio zoom objective lens and the effective focal length of the high-magnification-ratio zoom objective lens satisfy the following conditions under low-magnification zooming:
23.32≤TTL/Fl≤23.76
wherein TTL represents the optical total length of the high-magnification zoom objective lens, and F l represents the effective focal length of the high-magnification zoom objective lens at low magnification zoom.
In the present embodiment, the high-magnification-ratio zoom objective lens also satisfies the following conditional expression:
-1.30≤(R31+R32)/(R31-R32)≤-1.29；
-2.92≤(R41+R42)/(R41-R42)≤-2.84；
Wherein R31 is the radius of curvature of the object-side surface in the third lens element, R32 is the radius of curvature of the image-side surface in the third lens element, R41 is the radius of curvature of the object-side surface in the fourth lens element, and R42 is the radius of curvature of the image-side surface in the fourth lens element. By controlling the ratio of the object side surfaces and the image side surfaces of the third lens element 3 and the fourth lens element 4 to the curvature radius at the optical axis, on one hand, the astigmatism of the third lens element 3 and the fourth lens element 4 can be in a reasonable range, and the astigmatism generated by the front lens element can be effectively balanced, so that the high-zoom-ratio zoom objective lens has good imaging quality. On the other hand, the overall surface shapes of the third lens 3 and the fourth lens 4 can be controlled so as not to be excessively curved, thereby reducing the difficulty in processing and manufacturing the third lens 3 and the fourth lens 4. When the relation equation is satisfied, the relation between the curvature radius of the object side surface and the image side surface of the third lens 3 and the fourth lens 4 can be reasonably configured, which is favorable for reasonably configuring the shapes of the third lens 3 and the fourth lens 4, so that the optical deflection angle born by the third lens 3 and the fourth lens 4 in the high-zoom-ratio zoom objective lens is reasonably distributed, light can be smoothly transited between the third lens 3 and the fourth lens 4, the aberration sensitivity of the high-zoom-ratio zoom objective lens is reduced, and meanwhile, the third lens 3 and the fourth lens 4 are favorable for effectively improving the astigmatism and aberration of the field of view outside the axis, and further the imaging quality of the high-zoom-ratio zoom objective lens is favorable for improving.
As shown in fig. 2, the left side of fig. 2 is an astigmatism diagram of the high-magnification zoom objective lens under low-magnification zoom, and the right side is a distortion diagram of the high-magnification zoom objective lens under low-magnification zoom. In the distortion diagram, the distortion of the high-zoom-ratio zoom objective lens is less than 2%, and the influence on the imaging quality is small.
Fig. 3 is a graph showing a transfer function curve of a high-magnification zoom objective lens under low-magnification zooming, wherein the graph shows a lens imaging modulation degree of different spatial frequencies at each view field, the horizontal axis shows a spatial frequency (unit: lp/mm), and the vertical axis shows an MTF value. From the figure, it can be seen that the MTF curve is uniformly and smoothly reduced in the range of 12-30 lp/mm from the center to the edge field of view, and the MTF curve has better imaging quality and better detail resolution at both low frequency and high frequency.
Referring to fig. 4, a lens array diagram of a high-zoom-ratio zoom objective lens under low-zoom is shown, which indicates spot points under different view field conditions on an imaging picture, and is shown as spot imaging diagrams of three different wavelength light rays (0.4861 um, 0.5892um, 0.6563 um) on a screen under a certain view field condition on the premise of normalizing different view field conditions.
As shown in fig. 5, the optical path structure of the high-magnification zoom objective lens at high magnification zoom is shown.
The optical total length of the high-zoom-ratio zoom objective lens and the effective focal length of the high-zoom-ratio zoom objective lens meet the following conditions under high-zoom:
0.41≤TTL/Fh≤0.42
Wherein TTL represents the optical total length of the high-magnification zoom objective lens, and F h represents the effective focal length of the high-magnification zoom objective lens at high magnification zoom.
As shown in fig. 6, the left side of fig. 6 is an astigmatism diagram of the high magnification zoom objective lens under high magnification zoom, and the right side is a distortion diagram of the high magnification zoom objective lens under high magnification zoom. In the distortion diagram, the distortion of the high-zoom-ratio zoom objective lens is smaller than 1%, and the influence on the imaging quality is small.
Fig. 7 is a graph showing a transfer function curve of a high magnification zoom objective lens under high magnification zoom, wherein the graph shows a lens imaging modulation degree of different spatial frequencies at each view field, the horizontal axis shows a spatial frequency (unit: lp/mm), and the vertical axis shows an MTF value. From the figure, it can be seen that in the range of 0-30 lp/mm, the MTF curve is uniformly and smoothly reduced in the process of viewing from the center to the edge, and the imaging quality and detail resolution are better under the conditions of low frequency and high frequency.
Referring to fig. 8, a lens array diagram of a high-magnification zoom objective lens under high-magnification zoom is shown, which indicates spot points under different view field conditions on an imaging picture, and is shown as a spot imaging schematic diagram of three different wavelength light rays (0.4861 um, 0.5892um, 0.6563 um) on a screen under a certain view field condition on the premise of normalizing different view field conditions.
In one embodiment of the invention, the individual lens specific parameters are shown in table 1. Table 1 shows the radius of curvature R, thickness T, and lens material of each lens of the high-magnification-ratio zoom objective lens, wherein the unit of the radius of curvature R and thickness T is millimeter (mm).
TABLE 1
The lens surface corresponding to the surface No. 1 corresponds to the object side surface of the first lens 11, the lens surface corresponding to the surface No. 2 corresponds to the combined surface of the first lens 11 and the second lens 12, the lens surface corresponding to the surface No. 3 corresponds to the image side surface of the second lens 12, the lens surface corresponding to the surface No. 4 corresponds to the object side surface of the third lens 13, the lens surface corresponding to the surface No. 5 corresponds to the image side surface of the third lens 13, the lens surface corresponding to the surface No. 6 corresponds to the object side surface of the fourth lens 14, the lens surface corresponding to the surface No. 7 corresponds to the object side surface of the fourth lens 14, the lens surface corresponding to the surface No. 9 corresponds to the lens surface and the lens surface corresponding to the surface No. 10 correspond to the object side surface and the image side surface of the field lens 21, the lens surface corresponding to the lens 11 corresponds to the object side surface of the fifth lens 22, the lens surface corresponding to the surface No. 12 corresponds to the combined surface of the fifth lens 22 and the sixth lens 23, the lens surface corresponding to the lens surface No. 13 corresponds to the image side surface of the sixth lens 23, the lens surface corresponding to the lens surface No. 14 corresponds to the object side surface of the seventh lens 24, the lens surface corresponding to the lens surface No. 15 corresponds to the lens surface of the fourth lens 14, the lens surface corresponding to the lens surface No. 24, the lens surface corresponding to the lens surface No. 15 corresponds to the lens surface No. 24, the lens surface corresponding to the surface No. 7, the surface corresponding to the surface lens surface corresponding to the surface No. 20, lens surface corresponding to the surface No. 20, and the surface No. 26 corresponds to the surface No. 26, and the surface corresponding to the surface No. 26 is surface corresponding to the surface lens surface 20.
The overall parameters of the high-magnification zoom objective lens matched to table 1 are as follows:
the focal length of the objective lens group 1 is 44mm;
the focal length of the field lens 21 in the zoom group 2 is 28.059mm, the focal length of the second cemented lens is 36.502mm, the focal length of the third cemented lens is 36.499mm, and the focal length of the fourth cemented lens is-40.192 mm;
The distance between the third cemented lens and the glass plate 28 is 17.77mm;
The optical total length of the high-zoom-ratio zoom objective lens is 190.5354mm;
The radius of curvature of the third lens 13 satisfies (r31+r32)/(r31—r32) = -1.2909;
the radius of curvature of the fourth lens 14 satisfies (r41+r42)/(r41—r42) = -2.9261;
In a low magnification zoom state of the high magnification zoom objective lens:
the effective focal length efl= 6.8905mm of the high-zoom-ratio zoom objective;
The variable spacing between the field lens 21 and the second cemented lens is T 1 = 53.6861mm;
the variable spacing between the second and third cemented lenses is T 2 = 7.0561mm;
The variable spacing between the third and fourth cemented lenses is T 3 = 7.3578mm;
The ratio of the total length of the high-zoom-ratio zoom objective lens to the effective focal length of the high-zoom-ratio zoom objective lens under low-zoom is TTL/F l = 23.7612mm;
The focal length of the objective lens group 1, the focal length of the variable magnification group 2, and the effective focal length of the high-variable magnification zoom objective lens satisfy |efl/F 1|+|EFL/F2 |=0.9999;
in the high magnification zoom state, the high magnification zoom objective lens:
the effective focal length efl= 40.1607mm of the high-zoom-ratio zoom objective;
The variable spacing between the field lens 21 and the second cemented lens is T 1 = 3.217mm;
The variable spacing between the second and third cemented lenses is T 2 = 14.6492mm;
The variable spacing between the third and fourth cemented lenses is T 3 = 50.2337mm;
The ratio of the total length of the high-zoom-ratio zoom objective lens to the effective focal length of the high-zoom-ratio zoom objective lens is TTL/F h = 0.4249mm;
the focal length of the objective lens group 1, the focal length of the variable magnification group 2, and the effective focal length of the high-variable magnification zoom objective lens satisfy |efl/F 1|+|EFL/F2 |=0.9999.
In another embodiment of the invention, the individual lens specific parameters are shown in Table 2. Table 2 shows the radius of curvature R, thickness T, and lens material of each lens of the high-magnification-ratio zoom objective lens, wherein the unit of the radius of curvature R and thickness T is millimeter (mm).
TABLE 2
The lens surface corresponding to the surface No. 1 corresponds to the object side surface of the first lens 11, the lens surface corresponding to the surface No. 2 corresponds to the combined surface of the first lens 11 and the second lens 12, the lens surface corresponding to the surface No. 3 corresponds to the image side surface of the second lens 12, the lens surface corresponding to the surface No. 4 corresponds to the object side surface of the third lens 13, the lens surface corresponding to the surface No. 5 corresponds to the image side surface of the third lens 13, the lens surface corresponding to the surface No. 6 corresponds to the object side surface of the fourth lens 14, the lens surface corresponding to the surface No. 7 corresponds to the object side surface of the fourth lens 14, the lens surface corresponding to the surface No. 9 corresponds to the lens surface and the lens surface corresponding to the surface No. 10 correspond to the object side surface and the image side surface of the field lens 21, the lens surface corresponding to the lens 11 corresponds to the object side surface of the fifth lens 22, the lens surface corresponding to the surface No. 12 corresponds to the combined surface of the fifth lens 22 and the sixth lens 23, the lens surface corresponding to the lens surface No. 13 corresponds to the image side surface of the sixth lens 23, the lens surface corresponding to the lens surface No. 14 corresponds to the object side surface of the seventh lens 24, the lens surface corresponding to the lens surface No. 15 corresponds to the lens surface of the fourth lens 14, the lens surface corresponding to the lens surface No. 24, the lens surface corresponding to the lens surface No. 15 corresponds to the lens surface No. 24, the lens surface corresponding to the surface No. 7, the surface corresponding to the surface lens surface corresponding to the surface No. 20, lens surface corresponding to the surface No. 20, and the surface No. 26 corresponds to the surface No. 26, and the surface corresponding to the surface No. 26 is surface corresponding to the surface lens surface 20.
The overall parameters of the high-magnification zoom objective lens matched to table 2 are as follows:
The focal length of the objective lens group 1 is 45.17mm;
The focal length of the field lens 21 in the zoom group 2 is 28.245mm, the focal length of the second cemented lens is 36.675mm, the focal length of the third cemented lens is 36.117mm, and the focal length of the fourth cemented lens is-40.641 mm;
The distance between the third cemented lens and the glass plate 28 is 17.77mm;
the optical total length of the high-zoom-ratio zoom objective lens is 194.2857mm;
The radius of curvature of the third lens 13 satisfies (r31+r32)/(r31—r32) = -1.3056;
the radius of curvature of the fourth lens 14 satisfies (r41+r42)/(r41—r42) = -2.8460;
In a low magnification zoom state of the high magnification zoom objective lens:
Effective focal length efl= 6.9186mm of high-zoom-ratio zoom objective lens
The variable spacing between the field lens 21 and the second cemented lens is T 1 = 53.6942mm;
The variable spacing between the second and third cemented lenses is T 2 = 7.0518mm;
the variable spacing between the third and fourth cemented lenses is T 3 = 7.3533mm;
the ratio of the total length of the high-zoom-ratio zoom objective lens to the effective focal length of the high-zoom-ratio zoom objective lens is TTL/F l = 23.3239mm;
The focal length of the objective lens group 1, the focal length of the variable magnification group 2, and the effective focal length of the high-variable magnification zoom objective lens satisfy |efl/F 1|+|EFL/F2 |=0.9987;
in the high magnification zoom state, the high magnification zoom objective lens:
effective focal length efl= 41.1332mm of high-zoom-ratio zoom objective lens
The variable spacing between the field lens 21 and the second cemented lens is T 1 = 3.2864mm;
The variable spacing between the second and third cemented lenses is T 2 = 14.6512mm;
The variable spacing between the third and fourth cemented lenses is T 3 = 50.2295mm;
The ratio of the total length of the high-zoom-ratio zoom objective lens to the effective focal length of the high-zoom-ratio zoom objective lens is TTL/F h = 0.4112mm;
The focal length of the objective lens group 1, the focal length of the variable magnification group 2, and the effective focal length of the high-zoom-ratio zoom objective lens satisfy |efl/F 1|+|EFL/F2 |=1 0001.
The application also discloses an optical system comprising a high-magnification zoom objective as described in the first aspect above.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. A high-magnification-ratio zoom objective lens is characterized by comprising an objective lens group (1) and a magnification-changing group (2) which are sequentially arranged from an object side to an image side along an optical axis,
The objective lens group (1) comprises a first lens (11) with positive refractive power, a second lens (12) with negative refractive power, a third lens (13) with positive refractive power and a fourth lens (14) with positive refractive power, wherein the first lens (11), the second lens (12), the third lens (13) and the fourth lens (14) are sequentially arranged from an object side to an image side along an optical axis;
the variable power group (2) includes a field lens (21) having positive refractive power, a fifth lens (22) having negative refractive power, a sixth lens (23) having positive refractive power, a seventh lens (24) having negative refractive power, an eighth lens (25) having positive refractive power, a ninth lens (26) having negative refractive power, a tenth lens (27) having negative refractive power, and a glass plate (28), the field lens (21), the fifth lens (22), the sixth lens (23), the seventh lens (24), the eighth lens (25), the ninth lens (26), the tenth lens (27), and the glass plate (28) being disposed in this order from an object side to an image side along an optical axis;
the Gao Bianbei-ratio zoom objective lens meets the following conditional expression:
44.00≤F1<45.17；
8.17≤F2≤460.27；
6.89＜EFL＜41.13；
；
Wherein F 1 denotes a focal length of the objective lens group (1), F 2 denotes a focal length of the zoom lens group (2), EFL denotes an effective focal length of the Gao Bianbei-ratio zoom objective lens, and FOV denotes a full field angle of the Gao Bianbei-ratio zoom objective lens.
2. The high-magnification zoom objective lens according to claim 1, wherein the object-side paraxial region of the first lens (11) is convex, the object-side paraxial region of the second lens (12) is concave, the image-side paraxial region of the second lens (12) is convex, the object-side paraxial region of the third lens (13) is convex, the image-side paraxial region of the third lens (13) is concave, the object-side paraxial region of the fourth lens (14) is convex, the image-side paraxial region of the fourth lens (14) is concave, the object-side paraxial region of the field lens (21) is convex, the image-side paraxial region of the fifth lens (22) is concave, the object-side paraxial region of the sixth lens (23) is convex, the object-side surface of the sixth lens (23) is convex, the object-side paraxial region of the seventh lens (24) is convex, the image-side of the eighth lens (26) is concave, the image-side of the image-side (25) is the image-side paraxial region of the eighth lens (26), the image-side of the eighth lens (25) is concave, the object-side paraxial region of the tenth lens (27) is concave, and the image-side paraxial region of the tenth lens (27) is convex.
3. High-magnification-ratio zoom objective according to claim 1, wherein the first lens (11) and the second lens (12) constitute a first cemented lens, the fifth lens (22) and the sixth lens (23) constitute a second cemented lens, the seventh lens (24) and the eighth lens (25) constitute a third cemented lens, and the ninth lens (26) and the tenth lens (27) constitute a fourth cemented lens.
4. A high-power zoom objective according to claim 3, wherein the Gao Bianbei-ratio zoom objective satisfies the following conditional expression:
3.21≤T1≤53.69；
7.05≤T2≤14.65；
7.35≤T3≤50.23；
Wherein T 1 represents a variable pitch between the field lens (21) and the second cemented lens, T 2 represents a variable pitch between the second cemented lens and the third cemented lens, and T 3 represents a variable pitch between the third cemented lens and the fourth cemented lens.
5. The high-magnification-ratio zoom objective lens according to claim 1, wherein the Gao Bianbei-ratio zoom objective lens further satisfies the following conditional expression:
0.99<|EFL/F1|+|EFL/F2|<1.00
wherein F 1 denotes a focal length of the objective lens group (1), F 2 denotes a focal length of the zoom lens group (2), and EFL denotes an effective focal length of the Gao Bianbei-ratio zoom objective lens.
6. The high-magnification-ratio zoom objective of claim 1, wherein the Gao Bianbei-ratio zoom objective is at low magnification zoom, and the total optical length of the Gao Bianbei-ratio zoom objective and the effective focal length of the Gao Bianbei-ratio zoom objective satisfy the following conditions:
23.32≤TTL/Fl≤23.76
Wherein TTL represents the optical total length of the Gao Bianbei-fold zoom objective lens, and F l represents the effective focal length of the Gao Bianbei-fold zoom objective lens under low-magnification zoom.
7. The high-magnification-ratio zoom objective of claim 1, wherein the Gao Bianbei-ratio zoom objective is configured such that, at high magnification zoom, an optical total length of the Gao Bianbei-ratio zoom objective and an effective focal length of the Gao Bianbei-ratio zoom objective satisfy the following conditions:
0.41≤TTL/Fh≤0.42
wherein TTL represents the optical total length of the Gao Bianbei-fold zoom objective lens, and F h represents the effective focal length of the Gao Bianbei-fold zoom objective lens under high-magnification zoom.
8. The high-magnification-ratio zoom objective lens according to claim 1, wherein the Gao Bianbei-ratio zoom objective lens further satisfies the following conditional expression:
-1.30≤(R31+R32)/(R31-R32)≤-1.29；
-2.92≤(R41+R42)/(R41-R42)≤-2.84；
Wherein R31 is a radius of curvature of the object side surface in the third lens element (13), R32 is a radius of curvature of the image side surface in the third lens element (13), R41 is a radius of curvature of the object side surface in the fourth lens element (14), and R42 is a radius of curvature of the image side surface in the fourth lens element (14).
9. The high-magnification-ratio zoom objective lens according to claim 1, wherein the first lens (11), the second lens (12), the third lens (13), the fourth lens (14), the fifth lens (22), the sixth lens (23), the seventh lens (24), the eighth lens (25), the ninth lens (26), and the tenth lens (27) are spherical lenses.
10. An optical system comprising a high-magnification-ratio zoom objective lens according to any one of claims 1-9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106371199A (en) * | 2015-07-20 | 2017-02-01 | 扬明光学股份有限公司 | Zoom lens |
| CN107632379A (en) * | 2017-11-01 | 2018-01-26 | 东莞市宇瞳光学科技股份有限公司 | Small-sized ultra-large aperture starlight level ultra-wide angle zoom lens |
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| JP4027343B2 (en) * | 1999-10-06 | 2007-12-26 | キヤノン株式会社 | Zoom lens and imaging apparatus using the same |
| DE102006044355B4 (en) * | 2006-09-18 | 2008-05-21 | Leica Camera Ag | Wide angle wide angle zoom lens of retrofocus type |
| CN110133833B (en) * | 2019-05-31 | 2024-03-29 | 厦门力鼎光电股份有限公司 | Zoom lens |
| CN211180376U (en) * | 2019-12-09 | 2020-08-04 | 杭州图谱光电科技有限公司 | Large-target-surface continuous zoom telecentric lens |
| CN110780431A (en) * | 2019-12-13 | 2020-02-11 | 厦门力鼎光电股份有限公司 | Zoom lens |
| CN116338919A (en) * | 2021-12-24 | 2023-06-27 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
| CN114994888B (en) * | 2022-04-29 | 2023-07-28 | 厦门力鼎光电股份有限公司 | Medium-length focus zoom lens |
| CN116466481A (en) * | 2023-04-13 | 2023-07-21 | 中国科学院西安光学精密机械研究所 | High-performance long-focal-length continuous zoom lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371199A (en) * | 2015-07-20 | 2017-02-01 | 扬明光学股份有限公司 | Zoom lens |
| CN107632379A (en) * | 2017-11-01 | 2018-01-26 | 东莞市宇瞳光学科技股份有限公司 | Small-sized ultra-large aperture starlight level ultra-wide angle zoom lens |
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