CN114355593A - High-definition multi-component large-zoom-ratio optical zoom lens and imaging method thereof - Google Patents
High-definition multi-component large-zoom-ratio optical zoom lens and imaging method thereof Download PDFInfo
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Abstract
The invention relates to a high-definition multi-component large-zoom-ratio optical zoom lens which comprises a front fixed group A, a zoom focusing group B, an iris diaphragm, a middle fixed group C and a compensation focusing group D which are sequentially arranged along a light incident light path from left to right; the front fixed group a includes a meniscus negative lens a1, a biconvex positive lens a2, a biconvex positive lens A3, a meniscus positive lens a4, and a meniscus positive lens a 5; the variable-power focusing group B comprises a meniscus negative lens B1, a double-concave negative lens B2, a double-convex positive lens B3 and a meniscus negative lens B4; the intermediate fixed group C includes a meniscus positive lens C1, a meniscus negative lens C2, and a double convex positive lens C3; the compensated focus group D includes a meniscus positive lens D1, a meniscus negative lens D2, and a double convex positive lens D3. The invention adopts a four-component zooming scheme to realize high-magnification optical zooming, can accurately switch and detect targets in a large field range, improves the resolution level and the anti-interference capability of each focal segment through aberration balance correction, and can be adapted to various high-pixel cameras.
Description
Technical Field
The invention relates to a high-definition multi-component large-zoom-ratio optical zoom lens and an imaging method thereof.
Background
The large-magnification zooming ultra-high-definition monitoring technology is always the key exploration direction of civil and military optical zoom lenses in China. In recent years, with the deepening of the fusion of military and civil optical technologies, more and more optical zoom lenses are applied to the fields of space detection, airborne, traffic, security and the like, but the optical zoom lenses generally have the problems of large size, low long and short focal pixels, high difficulty in multiplying power widening, difficulty in increasing the image plane size, weak anti-interference capability and the like, so that the application scenes are severely limited.
The zoom ratio of the optical zoom lens is limited by the requirements of lens volume, aperture, image surface size and pixel, and particularly in short-focus and long-focus parts, the consistency of the sharpness of a detected picture is greatly reduced under the influence of off-axis aberration and complex chromatic aberration, and the zoom ratio compression has to be reduced. Nowadays, with the rapid increase of civil requirements and the development requirements of military equipment, the exploration and development of the high-definition zoom lens with large zoom ratio have important significance.
Disclosure of Invention
The invention improves the problems, namely the technical problem to be solved by the invention is to provide a high-definition multi-component large-zoom-ratio optical zoom lens and an imaging method thereof.
The invention is formed in this way, it includes the front fixed group A, the zoom group B, the iris diaphragm, the middle fixed group C and the compensation group D that set up from left to right sequentially along the incident light path of the light; the front fixing group A comprises a meniscus negative lens A1, a biconvex positive lens A2, a biconvex positive lens A3, a meniscus positive lens A4 and a meniscus positive lens A5, and the meniscus negative lens A1 and the biconvex positive lens A2 form a first joint sealing adhesive sheet; the zoom focusing group B comprises a meniscus negative lens B1, a double-concave negative lens B2, a double-convex positive lens B3 and a meniscus negative lens B4, wherein the double-concave negative lens B2 and the double-convex positive lens B3 form a second joint sealing adhesive sheet; the middle fixing group C comprises a meniscus positive lens C1, a meniscus negative lens C2 and a biconvex positive lens C3, and the meniscus negative lens C2 and the biconvex positive lens C3 form a third joint sealing adhesive sheet; the compensated focus group D includes a meniscus positive lens D1, a meniscus negative lens D2, and a double convex positive lens D3.
Further, the air distance between the first joint sealing adhesive sheet and the double convex positive lens A3 is 0.1mm, the air distance between the double convex positive lens A3 and the positive meniscus lens a4 is 0.1mm, the air distance between the positive meniscus lens a4 and the positive meniscus lens a5 is 0.1mm, and the air distance between the positive meniscus lens a5 and the negative meniscus lens B1 is 0.5mm to 49.89 mm; the air distance between the negative meniscus lens B1 and the second joint sealing adhesive sheet is 5.1mm, the air distance between the second joint sealing adhesive sheet and the negative meniscus lens B4 is 0.96mm, and the air distance between the negative meniscus lens B4 and the iris diaphragm is 0.5mm-49.89 mm; the air distance between the iris diaphragm and the positive meniscus lens C1 is 0.1 mm; the air distance between the positive meniscus lens C1 and the third joint sealing adhesive sheet is 4.39mm, the air distance between the third joint sealing adhesive sheet and the positive meniscus lens D1 is 0.5mm-25.29mm, the air distance between the positive meniscus lens D1 and the negative meniscus lens D2 is 3.52mm, and the air distance between the negative meniscus lens D2 and the double convex positive lens D3 is 0.1 mm;
further, flat glass is arranged on the right side of the double-convex positive lens D3, the center thickness of the flat glass is 1mm, and the air distance between the double-convex positive lens D3 and the flat glass is 5.5mm-20.29 mm; and the air distance from the flat glass to the image surface is 0.1 mm.
Further, the front fixed group A focal length fa and the short-focus focal length fw have the following relationship that | fa/fw | is more than or equal to 10.1 and less than or equal to 10.8; the front fixed group a focal length fa and the tele section focal length ft have the following relationship: fa/ft is more than or equal to 0.2 and less than or equal to 0.4; the zoom focusing group B focal length fb and the short focal length fw have the following relationship: | fb/fw | of more than or equal to 1.5 is less than or equal to 1.9; the zoom focusing group B focal length fb and the tele section focal length ft have the following relationship: | fb/ft | is more than or equal to 0.05 and less than or equal to 0.15; the intermediate fixed group C focal length fc and the short focal length fw have the following relationship: | fc/fw | is more than or equal to 4.7 and less than or equal to 5.2; the intermediate fixed group C focal length fc and the tele section focal length ft have the following relationship: | fc/ft | is more than or equal to 0.1 and less than or equal to 0.3; the focal length fd of the compensation focusing group D and the focal length fw of the short focal length have the following relationship: the | fd/fw | is more than or equal to 3.7 and less than or equal to 4.1; the compensation focusing group D focal length fd and the tele section focal length ft have the following relationship: | fd/ft | is more than or equal to 0.05 and less than or equal to 0.15.
Further, the negative meniscus lens B1 is a glass aspheric lens.
Further, the positive meniscus lens C1 is a glass aspheric lens.
Further, the biconvex positive lens D3 is a glass aspheric lens.
Further, a camera sensor is arranged at the rear end of the compensation focusing group D.
Further, the imaging method of the high-definition multi-component large zoom ratio optical zoom lens comprises the step of imaging after light rays sequentially pass through a meniscus negative lens A1, a biconvex positive lens A2, a biconvex positive lens A3, a meniscus positive lens A4, a meniscus positive lens A5, a meniscus negative lens B1, a biconcave negative lens B2, a biconvex positive lens B3, a meniscus negative lens B4, a meniscus positive lens C1, a meniscus negative lens C2, a biconvex positive lens C3, a meniscus positive lens D1, a meniscus negative lens D2 and a biconvex positive lens D3 from left to right.
Compared with the prior art, the invention has the following beneficial effects: the device adopts the structural form of two-group zoom focusing and four-group compensation focusing of the four-component optical structure, and adopts one glass aspheric lens to carry out aberration optimization on the zoom group and the focusing group, thereby not only reducing the size and volume of the lens, but also expanding the zoom magnification of the lens and enlarging the field angle change range and the size range of an imaging surface. The middle fixed group is provided with a glass non-spherical surface to correct aperture spherical aberration and coma aberration. Through the combination of a plurality of adhesive sheets and the introduction of a high-Abbe material, the polychromatic light aberration of the lens is fully corrected, and the imaging quality of the lens is improved; meanwhile, the lens adopts a four-component zooming scheme to realize high-magnification optical zooming, can accurately switch and detect targets in a large field range, improves the resolution level and the anti-interference capability of each focal segment through aberration balance correction, and can be adapted to various high-pixel cameras.
Drawings
FIG. 1 is a schematic diagram of a short focal length optical path of an embodiment of the present invention;
FIG. 2 is a schematic illustration of the optical path of the mid-focal section of an embodiment of the present invention;
FIG. 3 is a schematic diagram of the optical path of a tele section of an embodiment of the present invention;
FIG. 4 is a short focal length defocus plot of an embodiment of the present invention;
FIG. 5 is a defocus plot of an intermediate focus segment of an embodiment of the present invention;
FIG. 6 is a through focus plot of a tele section according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of short focal length optical transfer functions according to an embodiment of the present invention;
FIG. 8 is a schematic illustration of the optical transfer function of the intermediate focus segment in accordance with an embodiment of the present invention;
FIG. 9 is a schematic diagram of the optical transfer function of the tele section of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1: referring to fig. 1-3, in the present embodiment, a high-definition multi-element large zoom ratio optical zoom lens is provided, which includes a front fixed group a, a zoom focusing group B, an iris, a middle fixed group C, and a compensation focusing group D, which are sequentially arranged along a light incident path from left to right; the front fixing group A comprises a meniscus negative lens A1, a biconvex positive lens A2, a biconvex positive lens A3, a meniscus positive lens A4 and a meniscus positive lens A5, and the meniscus negative lens A1 and the biconvex positive lens A2 form a first joint sealing adhesive sheet; the zoom focusing group B comprises a meniscus negative lens B1, a double-concave negative lens B2, a double-convex positive lens B3 and a meniscus negative lens B4, wherein the double-concave negative lens B2 and the double-convex positive lens B3 form a second joint sealing adhesive sheet; the middle fixing group C comprises a meniscus positive lens C1, a meniscus negative lens C2 and a biconvex positive lens C3, and the meniscus negative lens C2 and the biconvex positive lens C3 form a third joint sealing adhesive sheet; the compensation focusing group D comprises a meniscus positive lens D1, a meniscus negative lens D2 and a double convex positive lens D3; a piece of flat glass is arranged in front of the image surface of the optical zoom lens. The four-component zoom scheme is adopted by the lens, so that high-magnification optical zoom is realized, targets in a large field range can be accurately switched and detected, the resolution level and the anti-interference capability of each focal segment are improved through aberration balance correction, and the lens can be adapted to various high-pixel cameras.
The focal length of the first joint sealing adhesive sheet formed by the meniscus negative lens A1 and the biconvex positive lens A2 is negative, so that the first joint sealing adhesive sheet has a divergence effect on incident light rays and the incident light rays are gentle; the focal length of the second joint sealing adhesive sheet formed by the double-concave negative lens B2 and the double-convex positive lens B3 is negative, and the second joint sealing adhesive sheet has a divergence effect on incident light of the zoom focusing group B; the focal length of the third joint sealing adhesive sheet formed by the meniscus negative lens C2 and the biconvex positive lens C3 is negative, and the third joint sealing adhesive sheet has a divergence effect on incident light of the middle fixed group C.
The gluing surface of the first joint sealing gluing sheet is bent to one side of the iris diaphragm; the gluing surface of the second joint sealing gluing sheet is bent to one side of the iris diaphragm; the gluing surface of the third joint sealing gluing sheet is back to the side of the variable diaphragm.
The front fixed group A keeps a relative static state with the variable diaphragm and the image plane in the process of zooming and focusing of the lens; the middle fixed group C keeps a relative static state with the variable diaphragm and the image plane in the zooming and focusing process of the lens; the zooming focusing group B performs axial displacement between the front fixed group A and the iris diaphragm to play a zooming role; the compensation focusing group performs axial displacement between the middle fixed group C and the image plane, and plays roles in compensating image plane deviation and focusing.
The front fixed group A adopts a plurality of high-Abbe coefficient materials, which is beneficial to the correction of the complex chromatic aberration of incident light with a large visual field, and can smooth the trend of the light by controlling the proper bending of the single lens and improve partial monochromatic aberration; the zoom focusing group B can correct the chromatic aberration on the axis and off-axis while compensating and correcting the spherical aberration and the coma aberration by introducing the adhesive sheet and controlling the direction of the adhesive surface, and the adhesive sheet of the zoom focusing group B selects a piece of ultrahigh refractive index material to be beneficial to improving the integral image quality.
In this embodiment, as shown in table 1, the air distance between the first joint bonding sheet and the double convex positive lens A3 is 0.1mm, the air distance between the double convex positive lens A3 and the meniscus positive lens a4 is 0.1mm, the air distance between the meniscus positive lens a4 and the meniscus positive lens a5 is 0.1mm, and the air distance between the meniscus positive lens a5 and the meniscus negative lens B1 is 0.5mm to 49.89 mm; the air distance between the negative meniscus lens B1 and the second joint sealing adhesive sheet is 5.1mm, the air distance between the second joint sealing adhesive sheet and the negative meniscus lens B4 is 0.96mm, and the air distance between the negative meniscus lens B4 and the iris diaphragm is 0.5mm-49.89 mm; the air distance between the iris diaphragm and the positive meniscus lens C1 is 0.1 mm; the air distance between the positive meniscus lens C1 and the third joint sealing adhesive sheet is 4.39mm, the air distance between the third joint sealing adhesive sheet and the positive meniscus lens D1 is 0.5mm-25.29mm, the air distance between the positive meniscus lens D1 and the negative meniscus lens D2 is 3.52mm, and the air distance between the negative meniscus lens D2 and the double convex positive lens D3 is 0.1 mm;
in the embodiment, the right side of the double convex positive lens D3 is provided with a flat glass, the center thickness of the flat glass is 1mm, and the air distance between the double convex positive lens D3 and the flat glass is 5.5mm-20.29 mm; and the air distance from the flat glass to the image surface is 0.1 mm.
In this embodiment, the front fixed group A focal length fa and the short focal length fw have a relationship of 10.1. ltoreq. fa/fw. ltoreq.10.8; the front fixed group a focal length fa and the tele section focal length ft have the following relationship: fa/ft is more than or equal to 0.2 and less than or equal to 0.4; the zoom focusing group B focal length fb and the short focal length fw have the following relationship: | fb/fw | of more than or equal to 1.5 is less than or equal to 1.9; the zoom focusing group B focal length fb and the tele section focal length ft have the following relationship: | fb/ft | is more than or equal to 0.05 and less than or equal to 0.15; the intermediate fixed group C focal length fc and the short focal length fw have the following relationship: | fc/fw | is more than or equal to 4.7 and less than or equal to 5.2; the intermediate fixed group C focal length fc and the tele section focal length ft have the following relationship: | fc/ft | is more than or equal to 0.1 and less than or equal to 0.3; the focal length fd of the compensation focusing group D and the focal length fw of the short focal length have the following relationship: the | fd/fw | is more than or equal to 3.7 and less than or equal to 4.1; the compensation focusing group D focal length fd and the tele section focal length ft have the following relationship: | fd/ft | is more than or equal to 0.05 and less than or equal to 0.15.
In this embodiment, as shown in table 2, the meniscus negative lens B1 is a glass aspheric lens; as shown in table 3, the positive meniscus lens C1 is a glass aspheric lens; as shown in table 4, the biconvex positive lens D3 is a glass aspherical lens.
In this embodiment, a camera sensor is disposed at the rear end of the compensation focusing group D, and can perform photoelectric signal conversion and image data acquisition.
In the present embodiment, at the time of imaging: the light rays sequentially pass through a meniscus negative lens A1, a biconvex positive lens A2, a biconvex positive lens A3, a meniscus positive lens A4, a meniscus positive lens A5, a meniscus negative lens B1, a biconcave negative lens B2, a biconvex positive lens B3, a meniscus negative lens B4, a meniscus positive lens C1, a meniscus negative lens C2, a biconvex positive lens C3, a meniscus positive lens D1, a meniscus negative lens D2 and a biconvex positive lens D3 from left to right to form an image.
Example 2: in addition to embodiment 1, in this embodiment, the front fixed group a has positive refractive power, the magnification-varying focusing group B has negative refractive power, the intermediate fixed group C and the compensation focusing group D have positive refractive power, the front group of the variable iris is composed of the front fixed group a and the magnification-varying focusing group B, the rear group of the variable iris is composed of the intermediate fixed group C and the compensation focusing group D, the front group refractive power of the variable iris is negative, and the rear group refractive power of the variable iris is positive.
In this embodiment, the total focal power of the front group of the variable iris is fq, and the total focal power of the rear group of the variable iris is fh, and the following relations are satisfied: the | fq/fh | is more than or equal to 0.4 and less than or equal to 0.7.
In the present embodiment, the aspheric curve equation expressions of the aspheric lens B1, the aspheric lens C1, and the aspheric lens D3 are:
wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; a is1、a2、a3、a4、a5、a6、a7、a8Are all high-order term coefficients.
In this embodiment, the high-definition multi-element large-zoom-ratio optical zoom lens composed of the front fixed group a, the zoom focusing group B, the middle fixed group C and the compensation focusing group D achieves the following optical indexes: the focal length range is 7mm-210mm, the zoom ratio is 30 times, the F value of the lens is F3.6-F5.0, the field angle range is 2.4-66.5 degrees, the image surface diameter is more than or equal to 9mm, the total length of the lens is less than or equal to 149mm, and the working temperature is as follows: -40 ° to 70 °;
in the present embodiment, as shown in table 1 below, lens parameters of the front fixed group a, the variable power focusing group B, the variable iris, the middle fixed group C, and the compensation focusing group D are sequentially as shown in the following table, and surface numbers are sequentially arranged from left to right along the light incidence direction for each lens:
table 1 lens parameter tables;
table 2 is an aspherical coefficient table of the aspherical lens B1;
table 3 is an aspherical coefficient table of the aspherical lens C1;
table 4 is an aspherical coefficient table of the aspherical lens D3;
referring to fig. 4, 5 and 6, it can be seen that the high-definition multi-element large zoom ratio optical zoom lens adopts an optical structure combination of four groups of 3 glass aspheric surfaces and 12 glass spherical surfaces, and through reasonable material selection and focal power balance, aberrations such as large field-of-view off-axis curvature and the like are fully corrected, so that transfer functions of different focal sections and different field angles are concentrated, and the consistency of the central definition and the peripheral definition is improved.
Referring to fig. 7, the high-definition multi-element large-zoom-ratio optical zoom lens fully corrects wide-angle aberration after the zoom focusing group B adopts an ultrahigh-refractive-index material, improves short-focus off-axis low-frequency and high-frequency transfer functions, and has a central transfer function of not less than 0.6 and an off-axis transfer function of not less than 0.35 at 120lp/mm, so that a short-focus segment has excellent large-view image reduction capability.
Referring to fig. 8, the high-definition multi-element large-zoom-ratio optical zoom lens fully balances the single-color and compound-color aberrations on and off the axis of the middle focal length, and further improves the transfer function of the middle focal length, so that the central transfer function of the middle focal length is more than or equal to 0.6 at 120lp/mm, and the off-axis transfer function is more than or equal to 0.4.
Referring to fig. 9, the high-definition multi-element large-zoom-ratio optical zoom lens adopts a combination of a plurality of aspheric lenses and a combination of adhesive sheets, and through the introduction of high-abbe and abnormal materials, chromatic aberration of a long focal length is well corrected, so that the central transfer function of the long focal length is more than or equal to 0.5 at 120lp/mm, and the off-axis transfer function is more than or equal to 0.25, and the imaging sharpness is ensured.
In summary, the high-definition multi-element large-zoom-ratio optical zoom lens provided by the invention adopts an optical structure form of four groups of 15 all-glass materials to realize an optical zoom function with a high zoom ratio, corrects the aberration which is difficult to correct and balance the spherical surface by introducing an aspheric surface profile, increases the imaging area, further compresses the lens volume, supports the use in various scenes, and has stronger competitiveness.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. A high-definition multi-component large-zoom-ratio optical zoom lens is characterized by comprising a front fixed group A, a zoom focusing group B, an iris diaphragm, a middle fixed group C and a compensation focusing group D which are sequentially arranged along a light incident light path from left to right; the front fixing group A comprises a meniscus negative lens A1, a biconvex positive lens A2, a biconvex positive lens A3, a meniscus positive lens A4 and a meniscus positive lens A5, and the meniscus negative lens A1 and the biconvex positive lens A2 form a first joint sealing adhesive sheet; the zoom focusing group B comprises a meniscus negative lens B1, a double-concave negative lens B2, a double-convex positive lens B3 and a meniscus negative lens B4, wherein the double-concave negative lens B2 and the double-convex positive lens B3 form a second joint sealing adhesive sheet; the middle fixing group C comprises a meniscus positive lens C1, a meniscus negative lens C2 and a biconvex positive lens C3, and the meniscus negative lens C2 and the biconvex positive lens C3 form a third joint sealing adhesive sheet; the compensated focus group D includes a meniscus positive lens D1, a meniscus negative lens D2, and a double convex positive lens D3.
2. A high definition multi-element large magnification-varying ratio zoom lens according to claim 1, wherein the air distance between the first bonding sheet and the biconvex positive lens A3 is 0.1mm, the air distance between the biconvex positive lens A3 and the meniscus positive lens a4 is 0.1mm, the air distance between the meniscus positive lens a4 and the meniscus positive lens a5 is 0.1mm, and the air distance between the meniscus positive lens a5 and the meniscus negative lens B1 is 0.5mm to 49.89 mm; the air distance between the negative meniscus lens B1 and the second joint sealing adhesive sheet is 5.1mm, the air distance between the second joint sealing adhesive sheet and the negative meniscus lens B4 is 0.96mm, and the air distance between the negative meniscus lens B4 and the iris diaphragm is 0.5mm-49.89 mm; the air distance between the iris diaphragm and the positive meniscus lens C1 is 0.1 mm; the air distance between the positive meniscus lens C1 and the third joint sealing adhesive sheet is 4.39mm, the air distance between the third joint sealing adhesive sheet and the positive meniscus lens D1 is 0.5mm-25.29mm, the air distance between the positive meniscus lens D1 and the negative meniscus lens D2 is 3.52mm, and the air distance between the negative meniscus lens D2 and the double convex positive lens D3 is 0.1 mm.
3. A high definition multi-element large magnification-varying ratio optical zoom lens according to claim 1, wherein the right side of the double convex positive lens D3 is provided with a flat glass, the center thickness of the flat glass is 1mm, and the air distance between the double convex positive lens D3 and the flat glass is 5.5mm-20.29 mm; and the air distance from the flat glass to the image surface is 0.1 mm.
4. A high definition multi-element large zoom ratio optical zoom lens according to claim 1, wherein the front fixed group A focal length fa and the short focal length fw have the following relationship of 10.1 ≦ fa/fw ≦ 10.8; the front fixed group a focal length fa and the tele section focal length ft have the following relationship: fa/ft is more than or equal to 0.2 and less than or equal to 0.4; the zoom focusing group B focal length fb and the short focal length fw have the following relationship: | fb/fw | of more than or equal to 1.5 is less than or equal to 1.9; the zoom focusing group B focal length fb and the tele section focal length ft have the following relationship: | fb/ft | is more than or equal to 0.05 and less than or equal to 0.15; the intermediate fixed group C focal length fc and the short focal length fw have the following relationship: | fc/fw | is more than or equal to 4.7 and less than or equal to 5.2; the intermediate fixed group C focal length fc and the tele section focal length ft have the following relationship: | fc/ft | is more than or equal to 0.1 and less than or equal to 0.3; the focal length fd of the compensation focusing group D and the focal length fw of the short focal length have the following relationship: the | fd/fw | is more than or equal to 3.7 and less than or equal to 4.1; the compensation focusing group D focal length fd and the tele section focal length ft have the following relationship: | fd/ft | is more than or equal to 0.05 and less than or equal to 0.15.
5. The high definition multi-element large magnification-varying ratio optical zoom lens according to claim 1, wherein the negative meniscus lens B1 is a glass aspheric lens.
6. The high definition multi-element large magnification-varying optical zoom lens according to claim 1, wherein the positive meniscus lens C1 is a glass aspheric lens.
7. A high definition multi-element large magnification ratio optical zoom lens according to claim 1, wherein the double convex positive lens D3 is a glass aspheric lens.
8. A high definition multi-element large magnification-varying ratio optical zoom lens according to claim 1, wherein the back end of the compensating focus group D is provided with a camera sensor.
9. An imaging method of the high-definition multi-element large-zoom-ratio optical zoom lens as claimed in any one of claims 1 to 8, wherein light rays sequentially pass through a negative meniscus lens A1, a double-convex positive lens A2, a double-convex positive lens A3, a positive meniscus lens A4, a positive meniscus lens A5, a negative meniscus lens B1, a negative double-concave lens B2, a double-convex positive lens B3, a negative meniscus lens B4, a positive meniscus lens C1, a negative meniscus lens C2, a positive meniscus lens C3, a positive meniscus lens D1, a negative meniscus lens D2 and a positive double-convex lens D3 from left to right to perform imaging.
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| CN113848635A (en) * | 2021-10-28 | 2021-12-28 | 厦门力鼎光电股份有限公司 | Zoom lens with large zoom ratio |
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2021
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| JPS63241511A (en) * | 1987-03-30 | 1988-10-06 | Nikon Corp | Zoom lens |
| JP2009169264A (en) * | 2008-01-18 | 2009-07-30 | Sony Corp | Zoom lens and imaging apparatus |
| JP2011028145A (en) * | 2009-07-29 | 2011-02-10 | Fujifilm Corp | Zoom lens |
| CN108627959A (en) * | 2017-03-15 | 2018-10-09 | 奥林巴斯株式会社 | Variable-power optical system and photographic device with the variable-power optical system |
| CN107656362A (en) * | 2017-11-08 | 2018-02-02 | 东莞市宇瞳光学科技股份有限公司 | The big multiplying power zoom lens of large aperture |
| CN113848635A (en) * | 2021-10-28 | 2021-12-28 | 厦门力鼎光电股份有限公司 | Zoom lens with large zoom ratio |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116107073A (en) * | 2022-12-25 | 2023-05-12 | 福建福光股份有限公司 | Ultra-large multiple low-distortion short wave infrared optical system |
| CN116107073B (en) * | 2022-12-25 | 2024-03-15 | 福建福光股份有限公司 | Ultra-large multiple low-distortion short wave infrared optical system |
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|---|---|
| CN114355593B (en) | 2023-04-07 |
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