CN110501809B - Full-frame macro lens of digital camera - Google Patents
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- CN110501809B CN110501809B CN201910889532.8A CN201910889532A CN110501809B CN 110501809 B CN110501809 B CN 110501809B CN 201910889532 A CN201910889532 A CN 201910889532A CN 110501809 B CN110501809 B CN 110501809B
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- G—PHYSICS
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Abstract
The company invents a digital camera full-frame macro lens with the specification of 1-5 times zoom, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens from the object space. The first lens to the twelfth lens are all glass materials produced by Chengming photoelectric Co. The 1-5 times zooming digital camera full-frame macro lens has the advantages that: the lens adopts spherical design to correct various aberrations, and spherical aberration generated by adopting a spherical mirror can be avoided, so that the structure is simplified, the imaging quality is improved, and the photographing distance is increased. The lenses are all made of glass materials, so that the quality of the lenses and the definition of the lens are improved, and the service performance of the lens is improved.
Description
Technical Field
The invention relates to a digital camera macro lens, in particular to a full-frame macro lens with the specification of a digital camera, which is characterized by having an ultra-long object distance and creating superior conditions for photography and illumination.
Background
In the macro lens, most lenses cause inconvenience for shooting and lighting due to short working distance, and many shooting enthusiasts want to have the macro lens with long shooting distance and convenient lighting.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a full-frame macro lens for a digital camera, which corrects various aberrations, simplifies the structure, improves the imaging quality, increases the working distance, has a high cost performance, and has a fine appearance.
The invention provides a full-frame macro lens with a specification of a digital camera, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens from an object space.
The first lens is a convex object-side spherical positive lens and comprises a first spherical convex surface and a second spherical concave surface,
the second lens is a convex object-side spherical positive lens and comprises a third spherical convex surface and a fourth spherical concave surface,
the third lens is a convex object-side spherical positive lens and comprises a fifth spherical convex surface and a sixth spherical convex surface,
the fourth lens is a concave object-side spherical negative lens and comprises a seventh spherical concave surface and an eighth spherical concave surface,
the fifth lens is a convex object-side spherical negative lens and comprises a ninth spherical convex surface and a tenth spherical concave surface,
the sixth lens is a convex object-side spherical positive lens and comprises an eleventh spherical convex surface and a twelfth spherical convex surface,
the seventh lens is a concave object-side spherical negative lens and comprises a thirteenth spherical concave surface and a fourteenth spherical concave surface,
the eighth lens is a convex object-side spherical negative lens, which comprises a fifteenth spherical convex surface and a sixteenth spherical concave surface,
the ninth lens is a convex object-side spherical positive lens and comprises a seventeenth spherical convex surface and an eighteenth spherical convex surface,
the tenth lens is a convex object-side spherical negative lens and comprises a nineteenth spherical convex surface and a twenty-fifth spherical concave surface.
The eleventh lens is a concave object-side spherical negative lens and comprises a twenty-first spherical concave surface and a twenty-second spherical concave surface,
the twelfth lens is a convex object-side spherical positive lens and comprises a twenty-third spherical convex surface and a twenty-fourth spherical convex surface.
The sixth spherical surface is glued with the seventh spherical surface, the tenth spherical surface is glued with the eleventh spherical surface, the sixteenth spherical surface is glued with the seventeenth spherical surface, and the twenty-second spherical surface is glued with the twenty-third spherical surface.
Further, the refractive index of the first lens is more than 1.8 and less than 1.9, and the dispersion thereof is more than 20 and less than 25; the preferred material for the first lens is a glass material of type HZF52A, having a refractive index of 1.846 and a dispersion of 23.78.
The refractive index of the second lens is more than 1.4 and less than 1.6, and the dispersion of the second lens is more than 80 and less than 85; the preferred material for the second lens is a glass material of type HFK61, index of refraction 1.497, and dispersion 81.61.
The refractive index of the third lens is more than 1.4 and less than 1.6, and the dispersion of the third lens is more than 80 and less than 85; the preferred material for the third lens is a glass material of type HFK61, having a refractive index of 1.497 and a dispersion of 81.61.
The refractive index of the fourth lens is more than 1.8 and less than 1.9, and the dispersion of the fourth lens is more than 35 and less than 45; the preferred material for the fourth lens is a glass material of type HZLaF68N, refractive index 1.883, and dispersion 39.22.
The refractive index of the fifth lens is more than 1.8 and less than 1.9, and the dispersion of the fifth lens is more than 20 and less than 25; the preferred material for this fifth lens is a glass material of type HZF52A, refractive index 1.846, with a dispersion of 23.78.
The refractive index of the sixth lens is more than 1.4 and less than 1.6, and the dispersion of the sixth lens is more than 80 and less than 85; the preferred material for the sixth lens is a glass material of type HFK61, having a refractive index of 1.497 and a dispersion of 81.61.
The refractive index of the seventh lens is more than 1.8 and less than 1.9, and the dispersion of the seventh lens is more than 35 and less than 45; the preferred material for the seventh lens is a glass material of type HZLaF68N, refractive index 1.883, and dispersion 39.22.
The refractive index of the eighth lens is more than 1.8 and less than 1.9, and the dispersion of the eighth lens is more than 35 and less than 45; the preferred material for the eighth lens is a glass material of type HZLaF68N, refractive index 1.883, and dispersion 39.22.
The refractive index of the ninth lens is more than 1.8 and less than 1.9, and the dispersion of the ninth lens is more than 20 and less than 25; the preferred material for the ninth lens is a glass material of type HZF52A, having a refractive index of 1.846 and a dispersion of 23.78.
The refractive index of the tenth lens is more than 1.8 and less than 1.9, and the dispersion of the tenth lens is more than 35 and less than 45; the preferred material for the tenth lens is a glass material of type HZLaF68N, index of refraction 1.883, and dispersion 39.22.
The refractive index of the eleventh lens is more than 1.4 and less than 1.6, and the dispersion of the eleventh lens is more than 80 and less than 85; the preferred material for the eleventh lens is a glass material of type HFK61, index of refraction 1.497, and dispersion 81.61.
The refractive index of the twelfth lens is more than 1.6 and less than 1.7, and the dispersion of the twelfth lens is more than 30 and less than 40; the preferred material for the twelfth lens is a glass material of type HF7, index of refraction 1.636, and dispersion of 35.35.
The lens parameters are:
the invention has the advantages that: the lens adopts a spherical design to correct various aberrations, and spherical aberration generated by adopting a spherical mirror can be avoided, so that the structure is simplified, the imaging quality is improved, and the photographing distance is increased. All the lenses are made of glass materials produced by Ducheng Guangming photoelectricity limited company, so that the quality of the lenses is improved, the definition of the lenses is improved, the use performance of the lenses is improved, and the cost performance of the lenses is greatly improved.
Drawings
Fig. 1 is a schematic view of a lens structure of a full-frame macro lens of a digital camera according to the present invention.
FIG. 2 is a MTF chart of the digital camera full-frame macro lens of the present invention.
Wherein, 1 is a first lens, 2 is a second lens, 3 is a third lens, 4 is a fourth lens, 5 is a fifth lens, 6 is a sixth lens, 7 is a seventh lens, 8 is an eighth lens, 9 is a ninth lens, 10 is a tenth lens, 11 is an eleventh lens, 12 is a twelfth lens, 13 is a diaphragm surface, and 14 is an image surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention is a full-frame macro lens system of a digital camera, which comprises 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, a ninth lens 9, a tenth lens 10, an eleventh lens 11, and a twelfth lens 12 in sequence from an object side. The first lens 1 is a convex object-side spherical positive lens comprising a first spherical convex surface and a second spherical concave surface, the second lens 2 is a convex object-side spherical positive lens comprising a third spherical convex surface and a fourth spherical concave surface, the third lens 3 is a convex object-side spherical positive lens comprising a fifth spherical convex surface and a sixth spherical convex surface, the sixth spherical surface is cemented with a seventh spherical surface, the fourth lens 4 is a concave object-side spherical negative lens comprising a seventh spherical concave surface and an eighth spherical concave surface, the fifth lens 5 is a convex object-side spherical negative lens comprising a ninth spherical convex surface and a tenth spherical concave surface, the tenth spherical surface is cemented with an eleventh spherical surface, the sixth lens 6 is a convex object-side spherical positive lens comprising an eleventh spherical convex surface and a twelfth spherical convex surface, the seventh lens 7 is a concave object-side spherical negative lens comprising a thirteenth spherical concave surface and a fourteenth spherical concave surface, the eighth lens 8 is a convex object-side spherical negative lens, including fifteenth spherical convex surface and sixteenth spherical concave surface, sixteenth spherical surface and seventeenth spherical surface veneer, ninth lens 9 is the positive lens of convex object space sphere, including seventeenth spherical convex surface and eighteenth spherical convex surface, and tenth lens 10 is the negative lens of convex object space sphere, including nineteenth spherical convex surface and twenty spherical concave surface. The eleventh lens 11 is a concave object-side spherical negative lens, and includes a twenty-first spherical concave surface and a twenty-second spherical concave surface, the twenty-second spherical surface is cemented with a twenty-third spherical surface, and the twelfth lens 12 is a convex object-side spherical positive lens, and includes a twenty-third spherical convex surface and a twenty-fourth spherical convex surface.
The first lens to the twelfth lens are all glass materials produced by Chengming photoelectric Co.
The refractive index of the first lens 1 is more than 1.8 and less than 1.9, and the dispersion thereof is more than 20 and less than 25; the preferred material for the first lens is a glass material of type HZF52A, having a refractive index of 1.846 and a dispersion of 23.78.
The refractive index of the second lens 2 is more than 1.4 and less than 1.6, and the dispersion thereof is more than 80 and less than 85; the preferred material for the second lens is a glass material of type HFK61, index of refraction 1.497, and dispersion 81.61.
The refractive index of the third lens 3 is more than 1.4 and less than 1.6, and the dispersion thereof is more than 80 and less than 85; the preferred material for the third lens is a glass material of type HFK61, having a refractive index of 1.497 and a dispersion of 81.61.
The refractive index of the fourth lens 4 is more than 1.8 and less than 1.9, and the dispersion thereof is more than 35 and less than 45; the preferred material for the fourth lens is a glass material of type HZLaF68N, refractive index 1.883, and dispersion 39.22.
The refractive index of the fifth lens 5 is more than 1.8 and less than 1.9, and the dispersion thereof is more than 20 and less than 25; the preferred material for this fifth lens is a glass material of type HZF52A, refractive index 1.846, with a dispersion of 23.78.
The refractive index of the sixth lens 6 is more than 1.4 and less than 1.6, and the dispersion thereof is more than 80 and less than 85; the preferred material for the sixth lens is a glass material of type HFK61, having a refractive index of 1.497 and a dispersion of 81.61.
The refractive index of the seventh lens 7 is more than 1.8 and less than 1.9, and the dispersion thereof is more than 35 and less than 45; the preferred material for the seventh lens is a glass material of type HZLaF68N, refractive index 1.883, and dispersion 39.22.
The refractive index of the eighth lens 8 is more than 1.8 and less than 1.9, and the dispersion thereof is more than 35 and less than 45; the preferred material for the eighth lens is a glass material of type HZLaF68N, refractive index 1.883, and dispersion 39.22.
The refractive index of the ninth lens 9 is more than 1.8 and less than 1.9, and the dispersion thereof is more than 20 and less than 25; the preferred material for the ninth lens is a glass material of type HZF52A, having a refractive index of 1.846 and a dispersion of 23.78.
The refractive index of the tenth lens 10 is more than 1.8 and less than 1.9, and the dispersion thereof is more than 35 and less than 45; the preferred material for the tenth lens is a glass material of type HZLaF68N, index of refraction 1.883, and dispersion 39.22.
The refractive index of the eleventh lens 11 is more than 1.4 and less than 1.6, and the dispersion thereof is more than 80 and less than 85; the preferred material for the eleventh lens is a glass material of type HFK61, index of refraction 1.497, and dispersion 81.61.
The refractive index of the twelfth lens 12 is more than 1.6 and less than 1.7, and the dispersion thereof is more than 30 and less than 40; the preferred material for the twelfth lens is a glass material of type HF7, index of refraction 1.636, and dispersion of 35.35.
The lens parameters are:
referring to fig. 2, half of the diagonal line of the CMOS effective area is defined as the maximum image height, which is set as 1.0 field, and 0.8 field, 0.65 field, 0.5 field, 0.3 field, and 0 field are taken for measuring the spatial frequency of different image heights. In this embodiment, half of the diagonal line of the CMOS is 21.6mm, that is, the image height of 1.0 field is about 18mm, the image height of 0.8 field is about 14mm, the image height of 0.5 field is about 10mm, the image height of 0.3 field is about 6mm, and the image height of 0 field is 0, that is, the center point of the CMOS.
Where the dashed line of F1 represents the diffraction limit curve and the solid line of F1 represents the MTF curve with a central field image height of 0.
Wherein the dashed line of F2 represents the MTF curve for a sagittal 0.3 field image height of 6mm, and the solid line of F2 represents the MTF curve for a tangential 0.3 field image height of 6 mm.
Wherein the dashed line of F3 represents the MTF curve for a sagittal 0.5 field image height of 10mm, and the solid line of F3 represents the MTF curve for a tangential 0.5 field image height of 10 mm.
Wherein the dashed line of F4 represents the MTF curve for a sagittal 0.65 field image height of 14mm, and the solid line of F4 represents the MTF curve for a tangential 0.65 field image height of 14 mm.
Wherein the dashed line of F5 represents the MTF curve for an image height of 18mm at 0.8 field in sagittal direction, and the solid line of F5 represents the MTF curve for an image height of 18mm at 0.8 field in tangential direction.
Where the dashed F6 line represents the MTF curve for a sagittal 1.0 field image height of 21.6mm and the solid F6 line represents the MTF curve for a tangential 1.0 field image height of 21.6 mm.
The full-frame macro lens of the digital camera has the advantages that: the lens adopts spherical design to correct various aberrations, and spherical aberration generated by adopting a spherical mirror can be avoided, so that the structure is simplified, the imaging quality is improved, and the photographing distance is increased. All the lenses are made of glass materials, so that the quality of the lenses and the definition of the lens are improved, and the service performance of the lens is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A digital camera full-frame macro lens is characterized in that: the lens comprises 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), a ninth lens (9), a tenth lens (10), an eleventh lens (11) and a twelfth lens (12) in sequence from the object side;
the first lens (1) is a convex object-side spherical positive lens and comprises a first spherical convex surface and a second spherical concave surface,
the second lens (2) is a convex object-side spherical positive lens and comprises a third spherical convex surface and a fourth spherical concave surface,
the third lens (3) is a convex object-side spherical positive lens and comprises a fifth spherical convex surface and a sixth spherical convex surface,
the fourth lens (4) is a concave object-side spherical negative lens and comprises a seventh spherical concave surface and an eighth spherical concave surface,
the fifth lens (5) is a convex object-side spherical negative lens and comprises a ninth spherical convex surface and a tenth spherical concave surface,
the sixth lens (6) is a convex object-side spherical positive lens and comprises an eleventh spherical convex surface and a twelfth spherical convex surface,
the seventh lens (7) is a concave object-side spherical negative lens and comprises a thirteenth spherical concave surface and a fourteenth spherical concave surface,
the eighth lens (8) is a convex object-side spherical negative lens, which comprises a fifteenth spherical convex surface and a sixteenth spherical concave surface,
the ninth lens (9) is a convex object-side spherical positive lens and comprises a seventeenth spherical convex surface and an eighteenth spherical convex surface,
the tenth lens (10) is a convex object-side spherical negative lens and comprises a nineteenth spherical convex surface and a twentieth spherical concave surface,
the eleventh lens (11) is a concave object-side spherical negative lens and comprises a twenty-first spherical concave surface and a twenty-second spherical concave surface,
the twelfth lens (12) is a convex object-side spherical positive lens and comprises a twenty-third spherical convex surface and a twenty-fourth spherical convex surface;
the sixth spherical surface is glued with the seventh spherical surface, the tenth spherical surface is glued with the eleventh spherical surface, the sixteenth spherical surface is glued with the seventeenth spherical surface, and the twenty-second spherical surface is glued with the twenty-third spherical surface.
2. A full-frame macro lens of a digital camera according to claim 1, wherein: the first lens (1) to the twelfth lens (12) are all made of glass materials.
3. A full-frame macro lens of a digital camera according to claim 1, wherein:
the refractive index of the first lens is more than 1.8 and less than 1.9, and the dispersion of the first lens is more than 20 and less than 25;
the refractive index of the second lens is more than 1.4 and less than 1.6, and the dispersion of the second lens is more than 80 and less than 85;
the refractive index of the third lens is more than 1.4 and less than 1.6, and the dispersion of the third lens is more than 80 and less than 85;
the refractive index of the fourth lens is more than 1.8 and less than 1.9, and the dispersion of the fourth lens is more than 35 and less than 45;
the refractive index of the fifth lens is more than 1.8 and less than 1.9, and the dispersion of the fifth lens is more than 20 and less than 25;
the refractive index of the sixth lens is more than 1.4 and less than 1.6, and the dispersion of the sixth lens is more than 80 and less than 85;
the refractive index of the seventh lens is more than 1.8 and less than 1.9, and the dispersion of the seventh lens is more than 35 and less than 45;
the refractive index of the eighth lens is more than 1.8 and less than 1.9, and the dispersion of the eighth lens is more than 35 and less than 45;
the refractive index of the ninth lens is more than 1.8 and less than 1.9, and the dispersion of the ninth lens is more than 20 and less than 25;
the refractive index of the tenth lens is more than 1.8 and less than 1.9, and the dispersion of the tenth lens is more than 35 and less than 45;
the refractive index of the eleventh lens is more than 1.4 and less than 1.6, and the dispersion of the eleventh lens is more than 80 and less than 85;
the refractive index of the twelfth lens is larger than 1.6 and smaller than 1.7, and the dispersion of the twelfth lens is larger than 30 and smaller than 40.
4. A full-frame macro lens of a digital camera according to claim 3, wherein:
the material of the first lens (1) is a glass material with the model number of HZF52A, the refractive index is 1.846, and the dispersion is 23.78;
the material of the second lens (2) is a glass material with the model number of HFK61, the refractive index is 1.497, and the dispersion is 81.61;
the material of the third lens (3) is a glass material with the model number of HFK61, the refractive index is 1.497, and the dispersion is 81.61;
the material of the fourth lens (4) is glass material with the model number of HZLaF68N, the refractive index is 1.883, and the dispersion is 39.22;
the material of the fifth lens (5) is a glass material with the model of HZF52A, the refractive index is 1.846, and the dispersion is 23.78;
the material of the sixth lens (6) is a glass material with the model number of HFK61, the refractive index is 1.497, and the dispersion is 81.61;
the seventh lens (7) is made of glass material with the model number of HZLaF68N, the refractive index is 1.883, and the dispersion is 39.22;
the eighth lens (8) is made of glass material with the model number of HZLaF68N, the refractive index is 1.883, and the dispersion is 39.22;
the ninth lens (9) is made of glass material with the model of HZF52A, the refractive index is 1.846, and the dispersion is 23.78;
the tenth lens (10) is made of glass material with the model number of HZLaF68N, the refractive index of the tenth lens is 1.883, and the dispersion of the tenth lens is 39.22;
the material of the eleventh lens (11) is a glass material with the model number of HFK61, the refractive index is 1.497, and the dispersion is 81.61;
the twelfth lens (12) is made of a glass material of type HF7, has a refractive index 1.636 and a dispersion of 35.35.
5. A full-frame macro lens of a digital camera according to claim 1, wherein: the lens parameters are as follows,
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