CN112363304B - Ultra-wide angle optical imaging system and optical device - Google Patents
Ultra-wide angle optical imaging system and optical device Download PDFInfo
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- CN112363304B CN112363304B CN202011345590.3A CN202011345590A CN112363304B CN 112363304 B CN112363304 B CN 112363304B CN 202011345590 A CN202011345590 A CN 202011345590A CN 112363304 B CN112363304 B CN 112363304B
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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Abstract
The invention provides an ultra-wide angle optical imaging system and an optical device, which sequentially comprise the following components from an object side to an image side: a first lens group having negative optical power, a second lens group having positive optical power, an aperture stop, a third lens group having positive optical power, a twelfth lens having negative optical power, a fourth lens group having positive optical power; the twelfth lens moves towards the image side along the optical axis in the focusing process, and the positions of the first lens group, the second lens group, the third lens group and the fourth lens group relative to the image plane are kept unchanged; the first lens group satisfies the following conditional expression: -2.8.ltoreq.F1/F.ltoreq.1.3, (1); the second lens group satisfies the following conditional expression: F2/F is less than or equal to 1.8 and less than or equal to 2.6, (2). The invention also provides optical equipment provided with the ultra-wide angle optical imaging system. The focusing assembly of the imaging system is composed of only one lens, so that the weight of the focusing group and the total weight of the optical imaging system are reduced, and the focusing assembly is beneficial to the rapid focusing of the optical imaging system and the imaging equipment.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to an ultra-wide angle optical imaging system and optical equipment.
Background
In recent years, in the photography market, due to the high performance and portability of the micro-single camera, the use population is increasing, and there is also a variety of demands for various photography scenes. The original factory matched lens focus Duan Fanwei which can be used on the half-picture micro-sheet still has a gap, particularly a wide-angle focus section, and the lenses of part of the focus sections are expensive and are not acceptable to all photographic consumers. The micro-single camera lens is the same as the single lens reflex, and consumers want to have high performance and high cost performance. And the micro-camera body is small, the consumer also wants the volume of the matched lens to be as small as possible compared with the single-lens reflex.
Disclosure of Invention
Aiming at the defects and market demands existing in the prior art, the invention provides an ultra-wide angle optical imaging system and optical equipment, which are small in size, light in weight and excellent in imaging performance, and an internal focusing component consists of only one lens.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
An ultra-wide angle optical imaging system comprising, in order from an object side to an image side: a first lens group having negative optical power, a second lens group having positive optical power, an aperture stop, a third lens group having positive optical power, a twelfth lens having negative optical power, a fourth lens group having positive optical power; the twelfth lens moves towards the image side along the optical axis in the focusing process, and the positions of the first lens group, the second lens group, the third lens group and the fourth lens group relative to the image plane are kept unchanged;
The first lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged, and the third lens and the fourth lens are combined into a cemented lens group; the second lens group comprises a sixth lens with positive focal power, a seventh lens with negative focal power and an eighth lens with positive focal power which are sequentially arranged, and the seventh lens and the eighth lens are combined into a cemented lens group; the third lens group comprises a ninth lens with negative focal power, a tenth lens with positive focal power and an eleventh lens with positive focal power which are sequentially arranged, and the ninth lens and the tenth lens are combined into a cemented lens group; the fourth lens group comprises a thirteenth lens with positive focal power and a fourteenth lens with negative focal power which are sequentially arranged;
The first lens group satisfies the following conditional expression:
-2.8≤F1/F≤-1.3，(1)；
The second lens group satisfies the following conditional expression:
1.8≤F2/F≤2.6，(2)
wherein F represents a focal length of the optical imaging system, F1 represents a combined focal length of the first lens group, and F2 represents a combined focal length of the second lens group.
As a preferred embodiment, the first lens group and the second lens group satisfy the following conditional expression:
0.19≤d/D12≤0.33，(3)；
The third lens group satisfies the following conditional expression:
0.003≤(R31-R32)/R31R32≤0.022，(4)
Wherein D represents a distance between the first lens group and the second lens group, D12 represents a distance from an object-side surface vertex of the first lens to the aperture stop, R 31 represents a radius of curvature value of the object-side surface of the ninth lens, and R 32 represents a radius of curvature value of the image-side surface of the tenth lens.
As a preferred embodiment, the twelfth lens satisfies the following conditional expression:
1.80≤Nd4≤1.95，(5)；20≤Vd4≤35，(6)；
The optical imaging system satisfies the following conditional expression:
1.1≤BFL/F≤1.4，(7)；
Wherein Nd4 is defined as the refractive index of the twelfth lens with respect to the light having the wavelength of 587.6 nm; vd4 is defined as the Abbe number of the twelfth lens with respect to light having a wavelength of 587.6 nm; BFL is the back focal length of the optical imaging system in the infinity state; f is the focal length of the optical imaging system in the infinity state.
As a preferred embodiment, the third lens, tenth lens and thirteenth lens are low-dispersion lenses having an abbe number higher than 70 with respect to light having a wavelength of 587.6 nm.
As a preferred embodiment, the first lens has negative power, the second lens has negative power, the third lens has negative power, and the fourth lens has positive power.
As a preferred embodiment, the first lens has negative power, the second lens has negative power, the third lens has positive power, and the fourth lens has negative power.
As a preferred solution, the first lens group further includes a fifth lens, the fifth lens is disposed on a side of the fourth lens away from the object side, the first lens has negative optical power, the second lens has negative optical power, the third lens has negative optical power, the fourth lens has positive optical power, the fifth lens has negative optical power, and the fifth lens is a low-dispersion lens with an abbe number higher than 70 with respect to light with a wavelength of 587.6 nm.
As a preferred aspect, the fourth lens group further includes a fifteenth lens having positive optical power, and the fifteenth lens is disposed on a side of the fourteenth lens away from the object side surface.
As a preferred aspect, the fourth lens group further includes a sixteenth lens having positive optical power, and the sixteenth lens is disposed on a side of the fifteenth lens away from the object side.
An optical apparatus provided with the aforementioned ultra-wide angle optical imaging system.
Compared with the prior art, the invention has the following beneficial effects:
The focusing component of the ultra-wide angle optical imaging system consists of only one lens, so that the weight of a focusing group and the load of a pushing motor are reduced, and the rapid focusing of the optical imaging system and imaging equipment is facilitated; under the condition that the conditional expressions (1) and (2) are met, the first lens group has proper negative focal power to ensure that the lens has a wide-angle view field with a large caliber, and meanwhile, the whole lens is small and light, the second lens group has proper positive focal power to inhibit the incidence angle of peripheral view field rays from being larger, and meanwhile, the vertical axis chromatic aberration and astigmatism can be compensated; four lenses having special dispersion and ultra-low dispersion are used to suppress chromatic aberration, so that the occurrence of purple fringing or chromatic dispersion at the edge of a subject is reduced as much as possible when a high contrast picture is taken.
For a clearer description of the structural features, technical means, and specific objects and functions achieved by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments:
Drawings
Fig. 1 shows a schematic structural view of embodiment 1 of the present invention;
FIG. 2 shows a schematic diagram of spherical aberration at infinity focusing in accordance with example 1 of the present invention;
FIG. 3 shows a schematic diagram of spherical aberration at the closest focusing distance in embodiment 1 of the present invention;
FIG. 4 shows a schematic diagram of the field curvature at infinity focusing in accordance with example 1 of the present invention;
fig. 5 shows a distortion diagram of embodiment 1 of the present invention at infinity focusing;
FIG. 6 shows a schematic diagram of the field curvature at the closest focusing distance according to example 1 of the present invention;
FIG. 7 shows a schematic diagram of distortion of example 1 of the present invention at the closest focus distance;
fig. 8 shows a schematic structural view of embodiment 2 of the present invention;
Fig. 9 shows a spherical aberration diagram at infinity focusing in accordance with embodiment 2 of the present invention;
FIG. 10 is a diagram showing spherical aberration diagram of example 2 of the present invention at the closest focusing distance;
FIG. 11 shows a schematic diagram of the field curvature at infinity focusing in accordance with example 2 of the present invention;
fig. 12 shows a distortion diagram at infinity focusing in accordance with embodiment 2 of the present invention;
FIG. 13 shows a schematic diagram of the field curvature at the closest focusing distance according to example 2 of the present invention;
FIG. 14 shows a schematic diagram of distortion of example 2 of the present invention at the closest focus distance;
fig. 15 shows a schematic structural view of embodiment 3 of the present invention;
Fig. 16 shows a spherical aberration diagram at infinity focusing in accordance with embodiment 3 of the present invention;
FIG. 17 is a diagram showing spherical aberration diagram of example 3 of the present invention at the closest focusing distance;
FIG. 18 shows a schematic diagram of the field curvature at infinity focusing in accordance with example 3 of the present invention;
fig. 19 shows a distortion diagram at infinity focusing in accordance with example 3 of the present invention;
FIG. 20 shows a schematic diagram of the field curvature at closest focus distance according to example 3 of the present invention;
FIG. 21 shows a schematic diagram of distortion of example 3 of the present invention at the closest focus distance;
Fig. 22 shows a schematic structural view of embodiment 4 of the present invention;
fig. 23 shows a spherical aberration diagram at infinity focusing in accordance with embodiment 4 of the present invention;
FIG. 24 is a diagram showing spherical aberration at the closest focusing distance in embodiment 4 of the present invention;
FIG. 25 shows a schematic diagram of the field curvature at infinity focusing in accordance with example 4 of the present invention;
fig. 26 shows a distortion diagram at infinity focusing in accordance with example 4 of the present invention;
FIG. 27 shows a schematic diagram of the field curvature at closest focus distance for example 4 of the present invention;
fig. 28 shows a distortion diagram of example 4 of the present invention at the closest focusing distance.
Detailed Description
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
As shown in fig. 1 to 28, an ultra-wide angle optical imaging system includes, in order from an object side to an image side: a first lens group G1 having negative power, a second lens group G2 having positive power, an aperture stop STP, a third lens group G3 having positive power, a twelfth lens having negative power, a fourth lens group G4 having positive power; in the focusing process, the twelfth lens moves towards the image side along the optical axis, and the positions of the first lens group G1, the second lens group G2, the third lens group G3 and the fourth lens group G4 relative to the image plane IMG are kept unchanged;
The first lens group includes a first lens L11, a second lens L12, a third lens L13 and a fourth lens L14 which are sequentially disposed, the third lens L13 and the fourth lens L14 are combined into a cemented lens, the third lens L13 is a low dispersion lens having an abbe number higher than 70 with respect to light having a wavelength of 587.6nm, and the first lens group G1 satisfies the following conditional expression:
-2.8≤F1/F≤-1.3，(1)
wherein F represents the focal length of the optical imaging system, and F1 represents the combined focal length of the first lens group.
If the condition (1) is satisfied, the first lens group has a reasonable angle of view and a reasonable rear working distance, and the incident height of the light beam in the rear group is in a reasonable interval; if the lower limit is lower in the conditional expression (1), the power of the first lens group G1 is reduced, and the divergence angle of the front group is reduced, so that the burden of the relative aperture of the front and rear groups is reduced, but the overall length of the lens is increased, which is not recommended. If the value is higher than the upper limit in the conditional expression (1), the power of the first lens group G1 increases, the divergence angle of the front group further increases, the amount of deflection angle of the rear group increases, and the burden of the front-rear group with respect to the aperture increases.
The second lens group G2 includes a sixth lens L21 having positive optical power, a seventh lens L22 having negative optical power, and an eighth lens L23 having positive optical power, which are sequentially disposed, the seventh lens L22 and the eighth lens L23 being combined into a cemented lens group, the second lens group G2 satisfying the following conditional expression:
1.8≤F2/F≤2.6，(2)
Wherein F represents the focal length of the optical imaging system, and F2 represents the combined focal length of the second lens group. The lens group meeting the condition (2) can effectively correct positive and negative chromatic spherical aberration and coma aberration, simultaneously reduce the effective caliber of light rays entering the third lens group G3, reduce the caliber of the lens of the third lens group G3 and achieve the aim of reducing the weight of the lens; if the value of the second lens group G2 is lower than the lower limit of the condition (2), the optical power of the second lens group G2 increases, and the larger light deflection angle can be shared, which is beneficial to the volume control of the front group of the diaphragm, but distortion and astigmatism cannot be well corrected. If the upper limit is higher than the upper limit in the condition (2), the power of the second lens group G2 is reduced, and a smaller light ray deflection angle is assumed, so that the negative lens in the first lens group G1 is excessively bent, which is unfavorable for processing and manufacturing.
The first lens group and the second lens group satisfy the following conditional expression:
0.19≤d/D12≤0.33，(3)
Where D denotes a distance between the first lens group G1 and the second lens group G2, and D12 denotes a distance from the object-side surface vertex of the first lens L12 to the aperture stop STP. And (3) the total length and the volume of the lens can be controlled in a reasonable range when the condition formula (3) is satisfied. If it is lower than the lower limit in conditional expression (3), the first lens group G1 and the second lens group G2 are reduced in pitch, so that the first lens group negative power is increased while causing the second lens group positive power to be increased, and the off-angle borne by the system rear group is immediately increased to cause an increase in aberration related to the aperture. If the ratio is higher than the upper limit in the conditional expression (3), the first lens group and the second lens group are spaced apart from each other, and the total length of the system increases, and the volume becomes large, which is disadvantageous for miniaturization.
The third lens group G3 includes a ninth lens L31 having negative power, a tenth lens L32 having positive power, and an eleventh lens L33 having positive power, which are sequentially disposed, the ninth lens L31 and the tenth lens L32 being combined into a cemented lens group, the tenth lens L32 being a low-dispersion lens having an abbe number higher than 70 with respect to light having a wavelength of 587.6nm, the third lens group G3 satisfying the following conditional expression:
0.003≤(R31-R32)/R31R32≤0.022，(4)
Wherein R 31 is a curvature radius value of the ninth lens L31 near the object side, and R 32 is a curvature radius value of the tenth lens L32 near the image side. The lens can not be excessively bent and straight and is beneficial to reducing astigmatism because the condition (4) is satisfied. If the value is lower than the lower limit of the conditional expression (4), the radius of curvature of the lens is too small, the incidence angle of the marginal ray increases, and the aberration such as astigmatism and coma increases. If the upper limit is higher than the upper limit in the re-conditional expression (4), the lens curvature radius is too large, and the astigmatic coma is in an under-corrected state.
The twelfth lens L41 satisfies the following conditional expression:
1.80≤Nd4≤1.95，(5)20≤Vd4≤35，(6)
Where Nd4 is defined as the refractive index of the twelfth lens L41 with respect to the light having the wavelength of 587.6nm, and Vd4 is defined as the abbe number of the twelfth lens with respect to the light having the wavelength of 587.6 nm.
The fourth lens group G4 includes a thirteenth lens L51 having positive optical power and a fourteenth lens L52 having negative optical power, which are sequentially arranged, the thirteenth lens L51 being a low-dispersion lens having an abbe number higher than 70 with respect to light having a wavelength of 587.6 nm.
The optical imaging system satisfies the following conditional expression:
1.1≤BFL/F≤1.4，(7)
Wherein BFL is the back focal length of the optical system in the infinity state; f is the focal length of the optical system in the infinity state. If the value is lower than the lower limit in the conditional expression (7), the back focal length is reduced, and the optical performance is easily ensured, but the lens group structure and the camera mount are liable to have interference problems. If the back focal length is higher than the upper limit in the conditional expression (7), the overall volume tends to be increased due to the excessively long back focal length, which is disadvantageous for realization of miniaturization.
The invention also provides optical equipment provided with the ultra-wide angle optical imaging system.
In the present invention, a parallel glass plate GL configured by one kind of optical filter is arranged between the fourth lens group G4 and the image plane IMG. The back focal length is a distance from the image side surface of the fourth lens group G4 to the image surface IMG, in which the parallel glass plate GL can be transformed into air.
Example 1
Fig. 1 is a schematic diagram of the ultra-wide angle optical imaging system of embodiment 1, in which the first lens group G1 includes a first lens L11 having negative power, a second lens L12 having negative power, a third lens L13 having negative power, a fourth lens L14 having positive power, and a fifth lens L15 having negative power, which are sequentially disposed, and the fifth lens L15 is a low-dispersion lens having an abbe number higher than 70 with respect to light having a wavelength of 587.6 nm.
Numerical data of the ultra-wide angle optical imaging system are shown in table 1, table 2 and table 3:
TABLE 1
TABLE 2
TABLE 3 Table 3
Wherein, the surface number represents the surface number of each lens from the object side to the image side;
In embodiment 1, the object side surface and the image side surface at L12 and L52 are formed as aspherical surfaces. In the table to be described below, the fourth, sixth, eighth, tenth-order aspherical coefficients A4, A6, A8, a10 of the aspherical surfaces and the conic constant k are collectively shown.
The description of the aspherical shape definition is omitted, and the following embodiments are not repeated here:
And y, starting from the optical axis, radial coordinates.
And z, the offset of the direction of the optical axis from the intersection point of the aspheric surface and the optical axis.
And r is the curvature radius of the reference sphere of the aspheric surface.
Aspheric coefficients of K,4 times, 6 times, 8 times, 10 times, 12 times, 14 times, 16 times;
The spherical aberration graph shows a spherical aberration curve at an F-number of 1.4, wherein the F-line, d-line, and C-line represent spherical aberration at a wavelength of 486nm, 587nm, and 656nm, respectively, and the abscissa indicates the spherical aberration magnitude and the ordinate indicates the normalized field of view. The field curvature graph represents a field curvature from the imaging center to the periphery, wherein a solid line S represents a value of a principal ray d line on a sagittal image plane, a solid line T represents a value of the principal ray d line on a meridional image plane, an abscissa represents a field curvature value magnitude, and an ordinate represents a field of view. The distortion graph represents a distortion curve from the imaging center to the periphery, wherein the abscissa represents a distortion value and the ordinate represents a field of view. The above description about various spherical aberration, curvature of field, and distortion curves is the same as that of other embodiments, and will not be repeated. Fig. 2 to 3 show spherical aberration diagrams of example 1 at infinity focusing and closest focusing, and fig. 4 to 7 show distortion graphs of example 1 at infinity and closest distance clutching Jiao Shichang curve. The axial chromatic aberration of the whole is less than 0.1mm, and chromatic dispersion is not easy to occur at the edge of a shot object. The original distortion from infinity to the nearest focusing distance is less than 2%, and can be basically 0.5% or no distortion by matching with the internal correction of the camera.
Example 2
Fig. 8 is a schematic diagram of the ultra-wide angle optical imaging system in embodiment 2, in this embodiment 2, the first lens group G1 includes a first lens L11 having negative optical power, a second lens L12 having negative optical power, a third lens L13 having negative optical power, and a fourth lens L14 having positive optical power, which are sequentially disposed, and the fourth lens group G4 further includes a fifteenth lens L53 having positive optical power, where the fifteenth lens L53 is disposed on a side of the fourteenth lens L52 away from the object side. Table 4, table 5 and table 6 below show various numerical data concerning the ultra-wide angle optical imaging system of the present embodiment.
TABLE 4 Table 4
TABLE 5
TABLE 6
Fig. 9 to 10 show spherical aberration diagrams of example 2 at infinity focusing and closest focusing, and fig. 11 to 14 show graphs of distortion of example 2 at infinity and closest distance clutching Jiao Shichang curve. The axial chromatic aberration of the whole is less than 0.1mm, and chromatic dispersion is not easy to occur at the edge of a shot object. The astigmatism control at infinity is better, and the off-axis image quality when shooting the sky night scene can be higher.
Example 3
Fig. 15 is a schematic diagram showing the structure of an ultra-wide angle optical imaging system of embodiment 3, in which the first lens group G1 includes a first lens L11 having negative optical power, a second lens L12 having negative optical power, a third lens L13 having negative optical power, a fourth lens L14 having positive optical power, and a fifth lens L15 having negative optical power, which are sequentially arranged, and the fifth lens L15 is a low-dispersion lens having an abbe number higher than 70 with respect to light having a wavelength of 587.6 nm. Table 7, table 8 and table 9 below show various numerical data concerning the ultra-wide angle optical imaging system of the present embodiment.
TABLE 7
TABLE 8
TABLE 9
Fig. 16 to 17 show spherical aberration diagrams of example 3 at infinity focusing and closest focusing, and fig. 18 to 21 show graphs of distortion of example 3 at infinity and closest distance clutching Jiao Shichang curve. The axial chromatic aberration of the whole is less than 0.1mm, and chromatic dispersion is not easy to occur at the edge of a shot object. The original distortion from infinity to the nearest focusing distance is less than 2%, and can be basically 0.5% or no distortion by matching with the internal correction of the camera.
Example 4
Fig. 22 is a schematic diagram showing a super wide angle optical imaging system of embodiment 4, in this embodiment 4, the first lens group G1 includes a first lens L11 having negative power, a second lens L12 having negative power, a third lens L13 having positive power, and a fourth lens L14 having negative power, which are sequentially disposed, and the fourth lens group G4 further includes a sixteenth lens L54 having negative power, and the sixteenth lens L54 is disposed on a side of the fifteenth lens L53 away from the object side. Table 10, table 11 and table 12 below show various numerical data concerning the ultra-wide angle optical imaging system of the present embodiment.
Table 10
TABLE 11
Table 12
Fig. 23 to 24 show spherical aberration diagrams at infinity and close-up focusing for example 4, and fig. 25 to 28 show curves and distortion curves for example 4 at infinity and close-up clutching Jiao Shichang. The axial chromatic aberration of the whole is less than 0.1mm, and chromatic dispersion is not easy to occur at the edge of a shot object. The original distortion from infinity to the nearest focusing distance is less than 2%, and can be basically 0.5% or no distortion by matching with the internal correction of the camera.
Table 13 shows a summary of calculated values for conditional expressions 1-7 for each of the examples:
TABLE 13
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An ultra-wide angle optical imaging system, characterized by: the method sequentially comprises the following steps from an object side to an image side: a first lens group having negative optical power, a second lens group having positive optical power, an aperture stop, a third lens group having positive optical power, a twelfth lens having negative optical power, a fourth lens group having positive optical power; the twelfth lens moves towards the image side along the optical axis in the focusing process, and the positions of the first lens group, the second lens group, the third lens group and the fourth lens group relative to the image plane are kept unchanged;
The first lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged, and the third lens and the fourth lens are combined into a cemented lens group; the second lens group comprises a sixth lens with positive focal power, a seventh lens with negative focal power and an eighth lens with positive focal power which are sequentially arranged, and the seventh lens and the eighth lens are combined into a cemented lens group; the third lens group comprises a ninth lens with negative focal power, a tenth lens with positive focal power and an eleventh lens with positive focal power which are sequentially arranged, and the ninth lens and the tenth lens are combined into a cemented lens group; the fourth lens group comprises a thirteenth lens with positive focal power and a fourteenth lens with negative focal power which are sequentially arranged;
The first lens group satisfies the following conditional expression:
-2.8≤F1/F≤-1.3，(1)；
The second lens group satisfies the following conditional expression:
1.8≤F2/F≤2.6，(2)；
wherein F represents a focal length of the optical imaging system, F1 represents a combined focal length of the first lens group, and F2 represents a combined focal length of the second lens group.
2. The ultra-wide angle optical imaging system of claim 1, wherein: the first lens group and the second lens group satisfy the following conditional expression:
0.19≤d/D12≤0.33，(3)；
The third lens group satisfies the following conditional expression:
0.003≤(R31-R32)/R31R32≤0.022，(4)
Wherein D represents a distance between the first lens group and the second lens group, D12 represents a distance from an object-side surface vertex of the first lens to the aperture stop, R 31 represents a radius of curvature value of the object-side surface of the ninth lens, and R 32 represents a radius of curvature value of the image-side surface of the tenth lens.
3. The ultra-wide angle optical imaging system of claim 1, wherein:
the twelfth lens satisfies the following conditional expression:
1.80≤Nd4≤1.95，(5)；20≤Vd4≤35，(6)；
The optical imaging system satisfies the following conditional expression:
1.1≤BFL/F≤1.4，(7)；
Wherein Nd4 is defined as the refractive index of the twelfth lens with respect to the light having the wavelength of 587.6 nm; vd4 is defined as the Abbe number of the twelfth lens with respect to light having a wavelength of 587.6 nm; BFL is the back focal length of the optical imaging system in the infinity state; f is the focal length of the optical imaging system in the infinity state.
4. A super wide angle optical imaging system as claimed in any one of claims 1 to 3, wherein: the third, tenth and thirteenth lenses are low dispersion lenses having an Abbe number higher than 70 with respect to light having a wavelength of 587.6 nm.
5. The ultra-wide angle optical imaging system of claim 4, wherein: the first lens has negative optical power, the second lens has negative optical power, the third lens has negative optical power, and the fourth lens has positive optical power.
6. The ultra-wide angle optical imaging system of claim 4, wherein: the first lens has negative optical power, the second lens has negative optical power, the third lens has positive optical power, and the fourth lens has negative optical power.
7. The ultra-wide angle optical imaging system of claim 4, wherein: the first lens group further comprises a fifth lens, the fifth lens is arranged on one side, far away from the object side, of the fourth lens, the first lens is provided with negative focal power, the second lens is provided with negative focal power, the third lens is provided with negative focal power, the fourth lens is provided with positive focal power, the fifth lens is provided with negative focal power, and the fifth lens is a low-dispersion lens with Abbe number higher than 70 about light rays with the wavelength of 587.6 nm.
8. The ultra-wide angle optical imaging system of claim 4, wherein: the fourth lens group further comprises a fifteenth lens with positive focal power, and the fifteenth lens is arranged on one side, far away from the object side, of the fourteenth lens.
9. The ultra-wide angle optical imaging system of claim 8, wherein: the fourth lens group further comprises a sixteenth lens with positive focal power, and the sixteenth lens is arranged on one side, far away from the object side, of the fifteenth lens.
10. An optical device, characterized by: the optical apparatus is provided with the ultra-wide angle optical imaging system as set forth in any one of claims 1 to 9.
Priority Applications (1)
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| CN115079381B (en) * | 2022-07-25 | 2022-11-01 | 江西联益光学有限公司 | VR glasses detection lens |
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| WO2013118466A1 (en) * | 2012-02-06 | 2013-08-15 | 富士フイルム株式会社 | Wide-angle lens and imaging device |
| CN204903851U (en) * | 2012-11-19 | 2015-12-23 | 富士胶片株式会社 | Zoom lens and projection type display device for projection |
| JP6304967B2 (en) * | 2013-08-05 | 2018-04-04 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| JP6946774B2 (en) * | 2017-06-21 | 2021-10-06 | 株式会社ニコン | Variable magnification optics and optics |
| JP6627915B2 (en) * | 2018-06-05 | 2020-01-08 | 株式会社ニコン | Variable power optical system and optical equipment |
| JP2020030251A (en) * | 2018-08-21 | 2020-02-27 | キヤノン株式会社 | Zoom lens and image capturing device having the same |
| JP2020134805A (en) * | 2019-02-22 | 2020-08-31 | 株式会社ニコン | Variable magnification optical system, optical instrument, and production method of variable magnification optical system |
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