CN110297319B - Wide-angle lens, lens unit, and imaging device - Google Patents
Wide-angle lens, lens unit, and imaging device Download PDFInfo
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- CN110297319B CN110297319B CN201910205549.7A CN201910205549A CN110297319B CN 110297319 B CN110297319 B CN 110297319B CN 201910205549 A CN201910205549 A CN 201910205549A CN 110297319 B CN110297319 B CN 110297319B
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- G—PHYSICS
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- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
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Abstract
The invention provides a wide-angle lens, a lens unit and an imaging device which are small and can ensure good optical performance. The wide-angle lens (10) has 6 lenses, and includes, in order from the object side, a front lens group (G1), an aperture Stop (ST), and a positive rear lens group (G2), and satisfies the following conditional expression (1): i f/f1| < 0.028 … (1). Here, the value f1 is the focal length of the front lens group (G1), and the value f is the focal length of the entire system.
Description
Technical Field
The present invention relates to a wide-angle lens including a front lens group, an aperture stop, and a positive rear lens group and having 6 lenses, and a lens unit and a photographing device having the wide-angle lens.
Background
In recent years, a wider angle, a smaller size, and a lower cost are demanded for a vehicle-mounted camera and a monitoring camera. In addition to the above requirements, the lens is required to achieve high optical performance from the axial side to the axial side, and to maintain high performance even under severe environments.
The optical system described in patent document 1 is configured by a front lens group, a diaphragm, and a positive rear lens group in this order from the object side, thereby achieving a reduction in size and a wider angle. However, in the optical system of patent document 1, since the magnification of the front lens group (japanese: パワー) is too large, large curvature of field and chromatic aberration of magnification occur, and thus sufficiently high optical performance cannot be achieved.
In addition, patent document 1 proposes an optical system using an aspherical glass lens immediately after the diaphragm, and an optical system in which 6 lenses are all formed of a plastic lens. If an aspherical glass is used as in the former, the cost is significantly increased, and cost reduction cannot be achieved. In the case of an optical system in which all of the 6 lenses are formed of plastic lenses as in the latter case, since the refractive index change due to temperature change is large as compared with glass, sufficient weather resistance cannot be secured, and the optical performance is further degraded in a severe environment.
Patent document 1: japanese laid-open patent publication No. 2016-57562
Disclosure of Invention
The invention aims to provide a wide-angle lens which is small and can ensure good optical performance.
Further, the present invention aims to provide a lens unit and a photographing device having the wide-angle lens described above.
To achieve at least one of the above objects, a wide angle lens reflecting one aspect of the present invention has 6 lenses including, in order from an object side, a front lens group, an aperture stop, and a positive rear lens group, wherein the wide angle lens satisfies the following conditional expression:
|f/f1|＜0.028…(1)
here, the value f1 is the focal length of the front lens group, and the value f is the focal length of the entire system. The front lens group is composed of, for example, the 1 st, 2 nd, and 3 rd lenses, and in this case, the rear lens group is composed of the 4 th, 5 th, and 6 th lenses. The present invention is not limited to the above, and the number of 6 lenses allocated in the front lens group and the rear lens group may be changed.
In order to achieve at least one of the above objects, a lens unit reflecting one aspect of the present invention includes the above wide-angle lens and a lens barrel for holding the wide-angle lens.
In order to achieve at least one of the above objects, an imaging device reflecting one aspect of the present invention includes the above wide-angle lens and an imaging element that detects an image obtained by the wide-angle lens.
Drawings
Fig. 1 is a diagram illustrating a lens unit and an imaging device having a wide-angle lens according to an embodiment of the present invention.
Fig. 2(a) is a cross-sectional view of a wide-angle lens and the like of example 1, and fig. 2(B) to 2(D) are aberration diagrams.
Fig. 3(a) is a cross-sectional view of a wide-angle lens and the like of example 2, and fig. 3(B) to 3(D) are aberration diagrams.
Fig. 4(a) is a cross-sectional view of a wide-angle lens and the like of example 3, and fig. 4(B) to 4(D) are aberration diagrams.
Fig. 5(a) is a cross-sectional view of a wide-angle lens and the like of example 4, and fig. 5(B) to 5(D) are aberration diagrams.
Fig. 6(a) is a cross-sectional view of a wide-angle lens and the like of example 5, and fig. 6(B) to 6(D) are aberration diagrams.
Fig. 7(a) is a cross-sectional view of a wide-angle lens and the like of example 6, and fig. 7(B) to 7(D) are aberration diagrams.
Detailed Description
Fig. 1 is a sectional view illustrating an imaging apparatus 100 according to an embodiment of the present invention. The imaging device 100 includes a camera module 30 that forms an image signal, and a processing unit 60 that operates the camera module 30 to function as the imaging device 100.
The camera module 30 includes a lens unit 40 incorporating the wide-angle lens 10 and a sensor unit 50 that converts a subject image formed by the wide-angle lens 10 into an image signal.
The lens unit 40 includes a wide-angle lens 10 as an image pickup optical system and a lens barrel 41 for assembling the wide-angle lens 10. The wide-angle lens 10 includes 1 st to 6 th lenses L1 to L6. The lens barrel 41 is formed of a material such as resin, metal, or a material obtained by mixing glass fiber with resin, and houses and holds a lens or the like therein. When the lens barrel 41 is formed using a material in which glass fibers are mixed with a resin, for example, the lens barrel is less likely to thermally expand than the resin, and the wide-angle lens 10 can be stably fixed. The barrel 41 has an opening OP through which light from the object side enters.
The wide-angle lens 10 has a total angle of view of 200 ° or more. The 1 st to 6 th lenses L1 to L6 constituting the wide-angle lens 10 have flange portions or outer peripheral portions directly or indirectly held on the inner surface side of the lens barrel 41, thereby realizing positioning in the direction of the optical axis AX and in the direction perpendicular to the optical axis AX. The lens barrel 41 also supports optical elements other than the lenses L1 to L6, such as an aperture stop (diaphragm) ST and a filter F1.
The sensor unit 50 includes a solid-state imaging element (imaging element) 51 that photoelectrically converts a subject image formed by the wide-angle lens 10, a substrate 52 that supports the solid-state imaging element 51, and a sensor holder 53 that holds the solid-state imaging element 51 via the substrate 52. The solid-state imaging element 51 is, for example, a CMOS type image sensor. The substrate 52 includes wiring, a peripheral circuit, and the like for operating the solid-state imaging element 51. The sensor holder 53 is formed of resin or other material, and positions the solid-state imaging element 51 with respect to the optical axis AX. The lens barrel 41 of the lens unit 40 is fixed in a state of being fitted into the sensor holder 53 and positioned.
The solid-state image sensor 51 includes a photoelectric conversion portion 51a as an image pickup surface I, and a signal processing circuit, not shown, is formed around the photoelectric conversion portion. In the photoelectric conversion portion 51a, photoelectric conversion elements as pixels are two-dimensionally arranged. The solid-state imaging device 51 is not limited to the CMOS image sensor described above, and another imaging device such as a CCD may be incorporated.
A filter or the like may be disposed between lenses constituting the lens unit 40 or between the lens unit 40 and the sensor unit 50. In the example of fig. 1, the filter F1 is disposed between the 6 th lens L6 of the wide-angle lens 10 and the solid-state imaging element 51. The filter F1 is a parallel flat plate assumed to be an optical low-pass filter, an IR cut filter, a package glass of the solid-state imaging element 51, or the like. The filter F1 may be disposed as a separate filter member, but may not be disposed separately, and any lens surface constituting the wide-angle lens 10 may be provided with a filter function. For example, in the case of an infrared cut filter, an infrared cut coating may be applied on the surface of 1 or more lenses.
The processing section 60 includes an element driving section 61, an input section 62, a storage section 63, a display section 64, and a control section 68. The element driving unit 61 outputs a control signal to a circuit or the like attached to the solid-state imaging element 51, thereby operating the solid-state imaging element 51. The device driving unit 61 may receive a voltage for driving the solid-state imaging device 51 and a clock signal from the control unit 68, or may output YUV or other digital pixel signals corresponding to an output signal of the solid-state imaging device 51 to an external circuit. The input unit 62 is a unit for receiving a user operation, the storage unit 63 is a unit for storing information necessary for the operation of the imaging apparatus 100, image data obtained by the camera module 30, and the like, and the display unit 64 is a unit for displaying presentation information, captured images, and the like to the user. The control unit 68 generally controls the operations of the element driving unit 61, the input unit 62, the storage unit 63, and the like, and can perform various image processing on image data obtained by the camera module 30, for example.
Although detailed description is omitted, the specific function of the processing unit 60 may be appropriately adjusted according to the application of the device in which the imaging apparatus 100 is installed. The imaging device 100 can be mounted in various devices for use such as an in-vehicle camera and a monitoring camera.
The wide-angle lens (imaging optical system) 10 and the like according to embodiment 1 will be described below with reference to fig. 1. The wide-angle lens 10 illustrated in fig. 1 has substantially the same structure as the wide-angle lens 10A of example 1 described later.
The wide-angle lens 10 shown in the drawing has 6 lenses, and includes, in order from the object side, a front lens group G1, an aperture stop ST, and a positive rear lens group G2. Specifically, the wide-angle lens 10 includes, in order from the object side, a 1 ST lens L1 having a negative magnification, a 2 nd lens L2 having a negative magnification, a 3 rd lens L3 having a positive magnification, an aperture stop ST, a 4 th lens L4 having a positive magnification, a 5 th lens L5 having a negative magnification, and a 6 th lens L6 having a positive magnification. A cemented lens CL is provided at the most image side position. The cemented lens CL includes, in order from the object side, a 5 th lens L5 as a biconcave lens and a 6 th lens L6 as a biconvex lens, and is cemented therewith.
In the wide-angle lens 10, a lens arrangement including, in order from the object side, a front lens group G1, an aperture stop ST, and a positive rear lens group G2 is employed, and a wide angle can be achieved while reducing the front spherical diameter.
In the wide-angle lens 10, the 1 ST lens L1 disposed on the most object side and the 4 th lens L4 disposed immediately after the aperture stop ST are glass lenses. In an in-vehicle camera or a monitoring camera, a lens is required to be used in a wide temperature range with less deterioration in performance even under severe environments. The 1 st lens L1 disposed on the most object side passes off-axis light at a high position of the lens, and largely affects off-axis performance. In addition, the on-axis rays and off-axis rays passing through the 4 th lens L4 disposed immediately after the diaphragm are both thick, and have a large influence on the on-axis and off-axis performances. Since the change in refractive index due to the temperature change of glass is smaller than that of plastic, by using glass as the lenses L1 and L4, the spherical aberration and the variation in curvature of field due to the temperature change can be suppressed, and high optical performance can be achieved from the top of the axis to the periphery even in a severe environment. Further, the 1 st lens L1 on the most object side, which is in direct contact with the outside, is made of a material that is not easily damaged, such as glass, and deterioration of optical performance due to damage can be prevented.
In the wide-angle lens 10, only the 1 ST lens L1 disposed on the most object side and the 4 th lens L4 disposed immediately after the aperture stop ST are spherical lenses. The 1 ST lens L1 disposed on the most object side and the 4 th lens L4 disposed immediately after the aperture stop ST are desirably glass lenses, but if an aspherical glass lens is used, the cost is significantly increased. Therefore, the 2 lenses of the 1 st lens L1 and the 4 th lens L4 are spherical glass lenses, which can realize high optical performance from the axial side to the axial side by setting the magnification of the two lens groups G1 and G2 while achieving cost reduction. In addition, the 2 nd lens L2, the 3 rd lens L3, the 5 th lens L5, and the 6 th lens L6, except for the 1 st lens L1 and the 4 th lens L4, which have a large influence on performance variation at the time of temperature change, are all aspheric lenses. Thus, occurrence of coma aberration can be suppressed, and an optical system having excellent imaging performance from the axis to the periphery can be realized. Further, if a plastic lens is used as a material of the aspherical lens, cost reduction can be achieved.
In the wide-angle lens 10, a cemented lens CL including, in order from the object side, a 5 th lens L5 which is a biconcave lens and a 6 th lens L6 which is a biconvex lens is disposed at the most image side. By disposing such a cemented lens CL at the position closest to the image side, the occurrence of chromatic aberration can be suppressed. In the lens disposed at the position closest to the image side, the passing on-axis light beam and off-axis light beam are thick, and the influence on the on-axis and off-axis performance is large. By using such a lens as the cemented lens CL including the biconcave 5 th lens L5 and the biconvex 6 th lens L6 in this order from the object side, axial chromatic aberration and chromatic aberration of magnification occurring in each of the lenses L5 and L6 can be cancelled out, and chromatic aberration of the entire optical system can be suppressed well.
The wide-angle lens 10 satisfies the following conditional expression (1).
|f/f1|＜0.028…(1)
Here, the value f1 is the focal length of the front lens group G1, and the value f is the focal length of the entire system.
Conditional expression (1) specifies the ratio of the focal length of the entire system to the focal length of the front lens group G1, and the feature of the wide-angle lens 10 is that the magnification of the front lens group G1 is small. By satisfying the conditional expression (1) with the value | f/f1|, it is possible to suppress curvature of field, coma aberration, and chromatic aberration of magnification while avoiding an excessively large magnification of the front lens group G1, and to realize high optical performance from the top to the periphery of the axis. Further, by avoiding an excessively large magnification of the front lens group G1, aberration variation due to misalignment error when assembling the lenses can be suppressed. The following range is more preferably adopted for conditional formula (1).
|f/f1|＜0.025…(1)'
The wide-angle lens 10 satisfies the following conditional expression (2).
Nd1＞1.80…(2)
Here, the value Nd1 is the refractive index of the 1 st lens L1 closest to the object side. Conditional expression (2) specifies an optimum range of the refractive index of the 1 st lens L1 disposed at the most object side position. Astigmatism generated by the 1 st lens L1 can be suppressed by making the refractive index Nd1 of the lens closest to the object side satisfy the conditional expression (2). As described above, the 1 st lens L1 on the most object side has a large influence on the off-axis performance of the entire optical system, and satisfying the conditional expression (2) enables image formation including high image height to be corrected well, thereby achieving high optical performance.
The following range is more preferably adopted for conditional formula (2).
Nd1＞1.83…(2)'
The wide-angle lens 10 satisfies the following conditional expression (3).
|f2/f1|＜0.1…(3)
Here, the value f1 is the focal length of the front lens group G1, and the value f2 is the focal length of the rear lens group G2. Conditional expression (3) specifies the ratio of the focal length of the rear lens group G2 to the focal length of the front lens group G1. By satisfying the conditional expression (3) with the value | f2/f1|, it is possible to appropriately arrange the magnifications of the front lens group G1 and the rear lens group G2, avoid an excessively large magnification of each lens group G1, G2, favorably suppress aberrations generated by the entire optical system, and realize high optical performance. The following range is more preferably adopted for conditional formula (3).
|f2/f1|＜0.08…(3)'
The wide-angle lens 10 may further include a lens having substantially no magnification or other optical elements (e.g., a lens, a filter member, etc.).
[ example ]
Hereinafter, examples of the wide-angle lens and the like according to the present invention will be described. The symbols used in the examples are as follows.
f: focal length of system
2 ω: maximum full viewing angle
TL: total optical length
Fno: f value
R: radius of curvature
D: spacing on the shaft
Nd: refractive index of lens material for D light
vd: abbe number of lens material
In each example, a surface denoted by "a" after each surface number is a surface having an aspherical shape, and the aspherical shape is represented by "equation 1" below, where the vertex of the surface is the origin, the X axis is the optical axis direction, and the height in the direction perpendicular to the optical axis is h.
[ mathematical formula 1 ]
Wherein,
ai: i-th order aspherical surface coefficient
R: radius of curvature
K: constant of cone
(example 1)
The overall parameters of the wide-angle lens of example 1 are as follows.
f＝0.97mm
2ω＝220°
TL＝12.60mm
Fno＝2.00
Data of the lens surface of the wide-angle lens of example 1 is shown in table 1 below. In table 1 and the like below, "surf.n" indicates a surface number, "ST" indicates an aperture stop, and "INF" indicates infinity.
[ Table 1 ]
The aspherical surface coefficients of the lens surface of example 1 are shown in table 2 below. In addition, in the following (including lens data of the table), the power of 10 (e.g., 2.5 × 10) is represented by E (e.g., 2.5E-02)-02)。
[ Table 2 ]
No. 3 surface
K＝8.2528E+00,A4＝4.6306E－03,A6＝－6.1485E－05,
A8＝－2.0866E－05,A10＝－2.2643E－06,A12＝3.9267E－07,
A14＝4.6273E－08,A16＝－1.1416E－08,A18＝4.7261E－10
No. 4 surface
K＝－1.5119E+00,A4＝3.4228E－02,A6＝4.2339E－02,
A8＝－7.4535E－02,A10＝8.6116E－02,A12＝－5.3555E－02,
A14＝1.7453E－02,A16＝－2.2848E－03,A18＝0.0000E+00
The 5 th plane
K＝1.5715E+00,A4＝－3.9754E－02,A6＝4.9645E－02,
A8＝2.1925E－04,A10＝－2.1779E－01,A12＝4.6789E－01,
A14＝－4.4376E－01,A16＝2.0427E－01,A18＝－3.6955E－02
The 6 th plane
K＝5.0401E－01,A4＝3.6480E－02,A6＝－3.0284E－02,
A8＝9.5293E－02,A10＝－1.2801E－01,A12＝1.0077E－01,
A14＝－4.2412E－02,A16＝7.6856E－03,A18＝0.0000E+00
The 10 th side
K＝－3.7420E+01,A4＝1.6710E－02,A6＝－1.2965E－01,
A8＝1.9349E－01,A10＝－1.8823E－01,A12＝1.3255E－01,
A14＝－7.1428E－02,A16＝2.0472E－02,A18＝0.0000E+00
The 11 th plane
K＝－8.6718E－01,A4＝4.7997E－01,A6＝－6.2814E－01,
A8＝4.1866E－01,A10＝－1.3465E－01,A12＝8.2899E－03,
A14＝2.4207E－03,A16＝0.0000E+00,A18＝0.0000E+00
The 12 th surface
K＝－8.6718E－01,A4＝4.7997E－01,A6＝－6.2814E－01,
A8＝4.1866E－01,A10＝－1.3465E－01,A12＝8.2899E－03,
A14＝2.4207E－03,A16＝0.0000E+00,A18＝0.0000E+00
The 13 th side
K＝－2.9097E+00,A4＝1.9240E－02,A6＝－1.3714E－01,
A8＝2.6051E－01,A10＝－2.6638E－01,A12＝1.5359E－01,
A14＝－4.6685E－02,A16＝5.8385E－03,A18＝0.0000E+00
The focal length of the lens group of example 1 is shown in table 3 below.
[ Table 3 ]
Front lens group-35.396 mm
Rear lens group 2.956mm
Fig. 2(a) is a sectional view of the wide-angle lens 10A and the like of embodiment 1. The wide-angle lens 10A includes a meniscus 1 st lens L1 having a negative power and being convex toward the object side, a meniscus 2 nd lens L2 having a negative power and being concave toward the image side, a meniscus 3 rd lens L3 having a positive power and being convex toward the image side, a biconvex 4 th lens L4, a biconcave 5 th lens L5, and a biconvex 6 th lens L6. The 1 ST lens L1 to the 3 rd lens L3 constitute a front lens group G1, the 4 th lens L4 to the 6 th lens L6 constitute a rear lens group G2, and an aperture stop ST is disposed between the front lens group G1 and the rear lens group G2. The most image-side cemented lens CL is composed of a cemented lens of the 5 th lens L5, which is a biconcave lens, and the 6 th lens L6, which is a biconvex lens. A filter F1 having an appropriate thickness is disposed between the 6 th lens L6 and the solid-state imaging element 51. The filter F1 is a parallel flat plate assumed to be an optical low-pass filter, an IR cut filter, a package glass of the solid-state imaging element 51, or the like. Reference numeral I denotes a projected surface of the solid-state imaging element 51, i.e., an imaging surface. The same applies to reference numerals F1 and I in the following embodiments.
Fig. 2(B) to 2(D) show aberration diagrams (spherical aberration, astigmatism, and distortion aberration) of the wide-angle lens 10A of example 1.
(example 2)
The overall parameters of the wide-angle lens of embodiment 2 are as follows.
f＝0.97mm
2ω＝220°
TL＝12.50mm
Fno＝2.00
Data of the lens surface of the wide-angle lens of example 2 is shown in table 4 below.
[ Table 4 ]
The aspherical surface coefficients of the lens surface of example 2 are shown in table 5 below.
[ Table 5 ]
No. 3 surface
K＝8.2921E+00,A4＝4.6147E－03,A6＝－6.7867E－05,
A8＝－2.0875E－05,A10＝－2.1899E－06,A12＝4.0603E－07,
A14＝4.7696E－08,A16＝－1.1343E－08,A18＝4.6375E－10
No. 4 surface
K＝－1.4955E+00,A4＝3.4590E－02,A6＝4.7498E－02,
A8＝－8.8441E－02,A10＝1.0154E－01,A12＝－6.2175E－02,
A14＝1.9774E－02,A16＝－2.5234E－03,A18＝0.0000E+00
The 5 th plane
K＝1.5445E+00,A4＝－3.2038E－02,A6＝－1.7251E－04,
A8＝1.6777E－01,A10＝－5.5512E－01,A12＝8.8156E－01,
A14＝－7.4537E－01,A16＝3.2446E－01,A18＝－5.7103E－02
The 6 th plane
K＝5.1312E－01,A4＝3.6155E－02,A6＝－2.9844E－02,
A8＝9.5431E－02,A10＝－1.2776E－01,A12＝1.0045E－01,
A14＝－4.2600E－02,A16＝7.8721E－03,A18＝0.0000E+00
The 10 th side
K＝－3.8031E+01,A4＝1.4371E－02,A6＝－1.2224E－01,
A8＝1.9407E－01,A10＝－2.1780E－01,A12＝1.8087E－01,
A14＝－1.0167E－01,A16＝2.6901E－02,A18＝0.0000E+00
The 11 th plane
K＝－9.7016E－01,A4＝4.6320E－01,A6＝－6.3623E－01,
A8＝4.6743E－01,A10＝－1.8987E－01,A12＝3.6578E－02,
A14＝－3.1201E－03,A16＝0.0000E+00,A18＝0.0000E+00
The 12 th surface
K＝－9.7016E－01,A4＝4.6320E－01,A6＝－6.3623E－01,
A8＝4.6743E－01,A10＝－1.8987E－01,A12＝3.6578E－02,
A14＝－3.1201E－03,A16＝0.0000E+00,A18＝0.0000E+00
The 13 th side
K＝－2.9090E+00,A4＝1.7730E－02,A6＝－1.3243E－01,
A8＝2.5244E－01,A10＝－2.5847E－01,A12＝1.4955E－01,
A14＝－4.5680E－02,A16＝5.7418E－03,A18＝0.0000E+00
The focal lengths of the lens groups of example 2 are shown in table 6 below.
[ Table 6 ]
Front lens group-40.435 mm
Rear lens group 2.930mm
Fig. 3(a) is a sectional view of the wide-angle lens 10B and the like of embodiment 2. The wide-angle lens 10B includes a meniscus 1 st lens L1 having a negative power and being convex toward the object side, a meniscus 2 nd lens L2 having a negative power and being concave toward the image side, a meniscus 3 rd lens L3 having a positive power and being convex toward the image side, a biconvex 4 th lens L4, a biconcave 5 th lens L5, and a biconvex 6 th lens L6. The 1 ST lens L1 to the 3 rd lens L3 constitute a front lens group G1, the 4 th lens L4 to the 6 th lens L6 constitute a rear lens group G2, and an aperture stop ST is disposed between the front lens group G1 and the rear lens group G2. The most image-side cemented lens CL is composed of a cemented lens of the 5 th lens L5, which is a biconcave lens, and the 6 th lens L6, which is a biconvex lens. A filter F1 having an appropriate thickness is disposed between the 6 th lens L6 and the solid-state imaging element 51.
Fig. 3(B) to 3(D) show aberration diagrams (spherical aberration, astigmatism, and distortion aberration) of the wide-angle lens 10B of example 2.
(example 3)
The overall parameters of the wide-angle lens of example 3 are as follows.
f＝0.97mm
2ω＝220°
TL＝12.50mm
Fno＝1.90
Data of the lens surface of the wide-angle lens of example 3 is shown in table 7 below.
[ Table 7 ]
The aspherical surface coefficients of the lens surface of example 3 are shown in table 8 below.
[ Table 8 ]
No. 3 surface
K＝8.3539E+00,A4＝4.4946E－03,A6＝－7.8563E－05,
A8＝－2.1150E－05,A10＝－2.1291E－06,A12＝4.1787E－07,
A14＝4.8739E－08,A16＝－1.1313E－08,A18＝4.5321E－10
No. 4 surface
K＝－1.5278E+00,A4＝3.4118E－02,A6＝5.0038E－02,
A8＝－9.2027E－02,A10＝1.0117E－01,A12＝－5.9380E－02,
A14＝1.8083E－02,A16＝－2.2128E－03,A18＝0.0000E+00
The 5 th plane
K＝1.4577E+00,A4＝－2.9957E－02,A6＝2.5317E－03,
A8＝1.2951E－01,A10＝－4.3034E－01,A12＝6.7620E－01,
A14＝－5.6057E－01,A16＝2.3830E－01,A18＝－4.0880E－02
The 6 th plane
K＝5.0516E－01,A4＝3.6508E－02,A6＝－3.0558E－02,
A8＝9.4879E－02,A10＝－1.2652E－01,A12＝1.0040E－01,
A14＝－4.3041E－02,A16＝7.9334E－03,A18＝0.0000E+00
The 10 th side
K＝－3.9882E+01,A4＝7.8710E－03,A6＝－8.9038E－02,
A8＝1.2240E－01,A10＝－1.2793E－01,A12＝1.1600E－01,
A14＝－7.4742E－02,A16＝2.1397E－02,A18＝0.0000E+00
The 11 th plane
K＝－1.0965E+00,A4＝4.0739E－01,A6＝－5.2798E－01,
A8＝3.4595E－01,A10＝－1.0842E－01,A12＝8.1141E－03,
A14＝8.6200E－04,A16＝0.0000E+00,A18＝0.0000E+00
The 12 th surface
K＝－1.0965E+00,A4＝4.0739E－01,A6＝－5.2798E－01,
A8＝3.4595E－01,A10＝－1.0842E－01,A12＝8.1141E－03,
A14＝8.6200E－04,A16＝0.0000E+00,A18＝0.0000E+00
The 13 th side
K＝－2.9963E+00,A4＝1.6181E－02,A6＝－1.2743E－01,
A8＝2.4561E－01,A10＝－2.5287E－01,A12＝1.4704E－01,
A14＝－4.5105E－02,A16＝5.6873E－03,A18＝0.0000E+00
The focal lengths of the lens groups of example 3 are shown in table 9 below.
[ Table 9 ]
Front lens group-50.384 mm
Rear lens group 2.924mm
Fig. 4(a) is a sectional view of the wide-angle lens 10C and the like of embodiment 3. The wide-angle lens 10C includes a meniscus 1 st lens L1 having a negative power and being convex toward the object side, a meniscus 2 nd lens L2 having a negative power and being concave toward the image side, a meniscus 3 rd lens L3 having a positive power and being convex toward the image side, a biconvex 4 th lens L4, a biconcave 5 th lens L5, and a biconvex 6 th lens L6. The 1 ST lens L1 to the 3 rd lens L3 constitute a front lens group G1, the 4 th lens L4 to the 6 th lens L6 constitute a rear lens group G2, and an aperture stop ST is disposed between the front lens group G1 and the rear lens group G2. The most image-side cemented lens CL is composed of a cemented lens of the 5 th lens L5, which is a biconcave lens, and the 6 th lens L6, which is a biconvex lens. A filter F1 having an appropriate thickness is disposed between the 6 th lens L6 and the solid-state imaging element 51.
Fig. 4(B) to 4(D) show aberration diagrams (spherical aberration, astigmatism, and distortion aberration) of the wide-angle lens 10C of example 3.
(example 4)
The overall parameters of the wide-angle lens of example 4 are as follows.
f＝0.97mm
2ω＝220°
TL＝12.50mm
Fno＝2.10
Data of the lens surface of the wide-angle lens of example 4 is shown in table 10 below.
[ Table 10 ]
The aspherical surface coefficients of the lens surface of example 4 are shown in table 11 below.
[ Table 11 ]
No. 3 surface
K＝8.3205E+00,A4＝4.2840E－03,A6＝－9.5699E－05,
A8＝－2.1284E－05,A10＝－2.0307E－06,A12＝4.3208E－07,
A14＝4.9965E－08,A16＝－1.1285E－08,A18＝4.3941E－10
No. 4 surface
K＝－1.4864E+00,A4＝3.7721E－02,A6＝4.3935E－02,A8＝－8.5626E－02,A10＝9.6392E－02,A12＝－5.7009E－02,
A14＝1.7336E－02,A16＝－2.1090E－03,A18＝0.0000E+00
The 5 th plane
K＝1.4496E+00,A4＝－1.8418E－02,A6＝－6.2587E－02,
A8＝3.2141E－01,A10＝－7.6547E－01,A12＝1.0293E+00,
A14＝－7.8274E－01,A16＝3.1555E－01,A18＝－5.2372E－02
The 6 th plane
K＝4.8889E－01,A4＝3.5423E－02,A6＝－2.6339E－02,
A8＝8.7240E－02,A10＝－1.2344E－01,A12＝1.0205E－01,
A14＝－4.3986E－02,A16＝7.8154E－03,A18＝0.0000E+00
The 10 th side
K＝－3.9510E+01,A4＝6.9494E－03,A6＝－1.0067E－01,
A8＝2.1598E－01,A10＝－3.5052E－01,A12＝3.6659E－01,
A14＝－2.1077E－01,A16＝4.9524E－02,A18＝0.0000E+00
The 11 th plane
K＝－1.0719E+00,A4＝3.9219E－01,A6＝－5.3108E－01,
A8＝4.1755E－01,A10＝－2.0407E－01,A12＝6.0276E－02,
A14＝－9.7374E－03,A16＝0.0000E+00,A18＝0.0000E+00
The 12 th surface
K＝－1.0719E+00,A4＝3.9219E－01,A6＝－5.3108E－01,
A8＝4.1755E－01,A10＝－2.0407E－01,A12＝6.0276E－02,
A14＝－9.7374E－03,A16＝0.0000E+00,A18＝0.0000E+00
The 13 th side
K＝－2.8788E+00,A4＝1.2662E－02,A6＝－1.1288E－01,
A8＝2.2246E－01,A10＝－2.3304E－01,A12＝1.3759E－01,
A14＝－4.2808E－02,A16＝5.4670E－03,A18＝0.0000E+00
The focal lengths of the lens groups of example 4 are shown in table 12 below.
[ Table 12 ]
Front lens group-55.961 mm
Rear lens group 2.928mm
Fig. 5(a) is a sectional view of the wide-angle lens 10D and the like of embodiment 4. The wide-angle lens 10D includes a meniscus 1 st lens L1 having a negative power and being convex toward the object side, a meniscus 2 nd lens L2 having a negative power and being concave toward the image side, a meniscus 3 rd lens L3 having a positive power and being convex toward the image side, a biconvex 4 th lens L4, a biconcave 5 th lens L5, and a biconvex 6 th lens L6. The 1 ST lens L1 to the 3 rd lens L3 constitute a front lens group G1, the 4 th lens L4 to the 6 th lens L6 constitute a rear lens group G2, and an aperture stop ST is disposed between the front lens group G1 and the rear lens group G2. The most image-side cemented lens CL is composed of a cemented lens of the 5 th lens L5, which is a biconcave lens, and the 6 th lens L6, which is a biconvex lens. A filter F1 having an appropriate thickness is disposed between the 6 th lens L6 and the solid-state imaging element 51.
Fig. 5(B) to 5(D) show aberration diagrams (spherical aberration, astigmatism, and distortion aberration) of the wide-angle lens 10D of example 4.
(example 5)
The overall parameters of the wide-angle lens of example 5 are as follows.
f＝0.98mm
2ω＝220°
TL＝12.36mmFno＝2.00
Data of the lens surface of the wide-angle lens of example 5 is shown in table 13 below.
[ Table 13 ]
The aspherical surface coefficients of the lens surface of example 5 are shown in table 14 below.
[ Table 14 ]
No. 3 surface
K＝5.0000E+01,A4＝－1.1843E－02,A6＝3.5567E－02,
A8＝－2.0180E－02,A10＝6.4471E－03,A12＝－1.2974E－03,
A14＝1.6738E－04,A16＝－1.3416E－05,A18＝6.0571E－07,
A20＝－1.1703E－08
No. 4 surface
K＝1.7167E－01,A4＝－6.8914E－03,A6＝－4.6392E－02,
A8＝2.3922E－01,A10＝－2.4193E－01,A12＝8.6396E－02,
A14＝1.1641E－02,A16＝－1.6340E－02,A18＝4.0391E－03,
A20＝－3.2599E－04
The 5 th plane
K＝3.8487E－01,A4＝－4.1708E－02,A6＝2.0932E－02,
A8＝－2.5775E－02,A10＝2.1375E－02,A12＝－6.6582E－03,
A14＝7.1743E－04,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 6 th plane
K＝9.4846E－01,A4＝5.3942E－02,A6＝－4.4237E－02,
A8＝1.4659E－01,A10＝－1.7996E－01,A12＝1.1065E－01,
A14＝－2.4442E－02,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 10 th side
K＝－1.4455E+01,A4＝－3.7506E－03,A6＝－7.2062E－02,
A8＝6.1547E－02,A10＝－2.5592E－02,A12＝4.6563E－03,
A14＝0.0000E+00,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 11 th plane
K＝－1.8100E+00,A4＝6.1146E－01,A6＝－7.1245E－01,
A8＝4.2615E－01,A10＝－1.3137E－01,A12＝1.4413E－02,
A14＝1.8170E－04,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 12 th surface
K＝－1.8100E+00,A4＝6.1146E－01,A6＝－7.1245E－01,
A8＝4.2615E－01,A10＝－1.3137E－01,A12＝1.4413E－02,
A14＝1.8170E－04,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 13 th side
K＝－1.7713E+01,A4＝－2.1079E－01,A6＝2.5018E－01,
A8＝－2.0201E－01,A10＝1.0154E－01,A12＝－2.7420E－02,
A14＝3.0890E－03,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The focal lengths of the lens groups of example 5 are shown in table 15 below.
[ Table 15 ]
Front lens group 48.859mm
Rear lens group 3.024mm
Fig. 6(a) is a sectional view of the wide-angle lens 10E and the like of embodiment 5. The wide-angle lens 10E includes a meniscus 1 st lens L1 having a negative power and being convex toward the object side, a meniscus 2 nd lens L2 having a negative power and being concave toward the image side, a meniscus 3 rd lens L3 having a positive power and being convex toward the image side, a biconvex 4 th lens L4, a biconcave 5 th lens L5, and a biconvex 6 th lens L6. The 1 ST lens L1 to the 3 rd lens L3 constitute a front lens group G1, the 4 th lens L4 to the 6 th lens L6 constitute a rear lens group G2, and an aperture stop ST is disposed between the front lens group G1 and the rear lens group G2. The most image-side cemented lens CL is composed of a cemented lens of the 5 th lens L5, which is a biconcave lens, and the 6 th lens L6, which is a biconvex lens. A filter F1 having an appropriate thickness is disposed between the 6 th lens L6 and the solid-state imaging element 51.
Fig. 6(B) to 6(D) show aberration diagrams (spherical aberration, astigmatism, and distortion aberration) of the wide-angle lens 10E of example 5.
(example 6)
The overall parameters of the wide-angle lens of example 6 are as follows.
f＝0.98mm
2ω＝220°
TL＝12.31mm
Fno＝2.00
Data of the lens surface of the wide-angle lens of example 6 is shown in table 16 below.
[ Table 16 ]
The aspherical surface coefficients of the lens surface of example 6 are shown in table 17 below.
[ Table 17 ]
No. 3 surface
K＝5.0000E+01,A4＝－1.1205E－02,A6＝3.5082E－02,
A8＝－2.0070E－02,A10＝6.4498E－03,A12＝－1.3033E－03,
A14＝1.6858E－04,A16＝－1.3529E－05,A18＝6.1097E－07,
A20＝－1.1799E－08
No. 4 surface
K＝1.6680E－01,A4＝－1.3385E－03,A6＝－7.8650E－02,
A8＝3.2581E－01,A10＝－3.7397E－01,A12＝2.0211E－01,
A14＝－4.7872E－02,A16＝1.1348E－03,A18＝1.3473E－03,
A20＝－1.5777E－04
The 5 th plane
K＝6.7043E－01,A4＝－4.3363E－02,A6＝2.2998E－02,
A8＝－2.9954E－02,A10＝2.8619E－02,A12＝－1.0566E－02,
A14＝1.3553E－03,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 6 th plane
K＝－1.9154E+00,A4＝－3.4077E－03,A6＝－2.0397E－02,
A8＝5.2293E－02,A10＝－4.5854E－02,A12＝1.4082E－02,
A14＝1.1180E－03,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 10 th side
K＝－1.4436E+01,A4＝2.7718E－03,A6＝－8.4443E－02,
A8＝7.4824E－02,A10＝－3.2637E－02,A12＝5.9093E－03,
A14＝0.0000E+00,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 11 th plane
K＝－1.7548E+00,A4＝6.2505E－01,A6＝－7.3548E－01,
A8＝4.3838E－01,A10＝－1.2974E－01,A12＝1.0894E－02,
A14＝1.0075E－03,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 12 th surface
K＝－1.7548E+00,A4＝6.2505E－01,A6＝－7.3548E－01,
A8＝4.3838E－01,A10＝－1.2974E－01,A12＝1.0894E－02,
A14＝1.0075E－03,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The 13 th side
K＝－1.8836E+01,A4＝－2.1234E－01,A6＝2.5613E－01,
A8＝－2.0938E－01,A10＝1.0641E－01,A12＝－2.9009E－02,
A14＝3.2885E－03,A16＝0.0000E+00,A18＝0.0000E+00,
A20＝0.0000E+00
The focal lengths of the lens groups of example 6 are shown in table 18 below.
[ Table 18 ]
Front lens group 36.218mm
Rear lens group 3.023mm
Fig. 7(a) is a sectional view of the wide-angle lens 10F and the like of embodiment 6. The wide-angle lens 10F includes a meniscus 1 st lens L1 having a negative power and being convex toward the object side, a meniscus 2 nd lens L2 having a negative power and being concave toward the image side, a meniscus 3 rd lens L3 having a positive power and being convex toward the image side, a biconvex 4 th lens L4, a biconcave 5 th lens L5, and a biconvex 6 th lens L6. The 1 ST lens L1 to the 3 rd lens L3 constitute a front lens group G1, the 4 th lens L4 to the 6 th lens L6 constitute a rear lens group G2, and an aperture stop ST is disposed between the front lens group G1 and the rear lens group G2. The most image-side cemented lens CL is composed of a cemented lens of the 5 th lens L5, which is a biconcave lens, and the 6 th lens L6, which is a biconvex lens. A filter F1 having an appropriate thickness is disposed between the 6 th lens L6 and the solid-state imaging element 51.
Fig. 7(B) to 7(D) show aberration diagrams (spherical aberration, astigmatism, and distortion aberration) of the wide-angle lens 10F of example 6.
The values of examples 1 to 6 corresponding to conditional expressions (1) to (3) are summarized in table 19 below for reference.
[ Table 19 ]
While the wide-angle lens and the like have been described as the embodiments, the wide-angle lens of the present invention is not limited to the embodiments and examples described above, and various modifications are possible. For example, the front lens group G1 may be constituted by 4 lenses and the positive rear lens group G2 may be constituted by 2 lenses, or the front lens group G1 may be constituted by 2 lenses and the positive rear lens group G2 may be constituted by 4 lenses.
In the above-described embodiment, when the filter F1 is used for an in-vehicle camera, a monitoring camera, or the like and performs imaging using visible light or near infrared light, a configuration may be adopted in which the filter F1 is divided into 2 filters and each filter has a different function.
Claims (8)
1. A wide-angle lens having 6 lenses including, in order from an object side, a front lens group, a diaphragm, and a positive rear lens group, wherein the wide-angle lens having 6 lenses is, in order from the object side, a 1 st lens having negative magnification, a 2 nd lens having negative magnification, a 3 rd lens having positive magnification, a 4 th lens having positive magnification, a 5 th lens having negative magnification, and a 6 th lens having positive magnification, and satisfies the following conditional expressions:
－0.028＜f/f1≤－0.017
f 1: focal length of the front lens group
f: focal length of the entire system.
2. The wide-angle lens of claim 1,
the lens disposed on the most object side and the lens disposed immediately after the diaphragm are glass lenses.
3. The wide-angle lens of claim 1 or 2,
the wide-angle lens satisfies the following conditional expression:
Nd1＞1.80
nd 1: refractive index of the lens closest to the object side.
4. The wide-angle lens of claim 2,
only the lens disposed on the most object side and the lens disposed immediately after the aperture are spherical lenses.
5. The wide-angle lens of claim 1 or 2,
a cemented lens including a biconcave lens and a biconvex lens in this order from the object side is disposed closest to the image side.
6. The wide-angle lens of claim 1 or 2,
the wide-angle lens satisfies the following conditional expression:
|f2/f1|＜0.1
f 1: focal length of the front lens group
f 2: a focal length of the rear lens group.
7. A lens unit in which, in a lens unit,
the lens unit includes the wide-angle lens according to any one of claims 1 to 6 and a lens barrel for holding the wide-angle lens.
8. A photographing apparatus, wherein,
the imaging device includes the wide-angle lens according to any one of claims 1 to 6 and an imaging element for detecting an image obtained by the wide-angle lens.
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| TWI718066B (en) * | 2020-05-29 | 2021-02-01 | 紘立光電股份有限公司 | Optical imaging lens, imaging device, and electronic device |
| CN112433345A (en) * | 2020-12-07 | 2021-03-02 | 天津欧菲光电有限公司 | Optical lens, camera module, electronic device and vehicle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298195A (en) * | 2010-06-24 | 2011-12-28 | 株式会社理光 | Image-Forming Lens, and Imaging Apparatus and Information Device Using the Image-Forming Lens |
| JP2013073142A (en) * | 2011-09-29 | 2013-04-22 | Fujifilm Corp | Image pickup lens and image pickup apparatus |
| CN205427290U (en) * | 2016-03-22 | 2016-08-03 | 中山联合光电科技股份有限公司 | Confocal, high pixel of high low temperature, little distortion, no parasitics light optical system |
| CN105866930A (en) * | 2016-06-21 | 2016-08-17 | 中山联合光电科技股份有限公司 | High-definition lens |
| CN106199921A (en) * | 2014-09-12 | 2016-12-07 | 日本电产三协株式会社 | Pantoscope |
| CN107203032A (en) * | 2016-03-16 | 2017-09-26 | Hoya株式会社 | Imaging optical system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2646350B2 (en) * | 1986-01-28 | 1997-08-27 | オリンパス光学工業株式会社 | Endoscope objective lens |
| JP3938143B2 (en) * | 2004-02-09 | 2007-06-27 | コニカミノルタオプト株式会社 | Super wide-angle optical system |
| JP2007279632A (en) * | 2006-04-12 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Super wide angle lens |
| JP2008233610A (en) * | 2007-03-22 | 2008-10-02 | Fujinon Corp | Imaging lens and imaging device equipped with the imaging lens |
| JP2009092798A (en) * | 2007-10-05 | 2009-04-30 | Fujinon Corp | Imaging lens and imaging device |
| JP5588790B2 (en) * | 2009-08-31 | 2014-09-10 | パナソニック株式会社 | Lens system, interchangeable lens device, and camera system |
| JP2015060201A (en) * | 2013-09-20 | 2015-03-30 | 日立マクセル株式会社 | Imaging lens system and imaging device |
| JP2015190999A (en) * | 2014-03-27 | 2015-11-02 | 株式会社タムロン | Image formation optical system |
| TWI588524B (en) * | 2015-11-27 | 2017-06-21 | 大立光電股份有限公司 | Photographing optical lens assembly, image capturing unit and electronic device |
| TWI617831B (en) * | 2016-05-20 | 2018-03-11 | 大立光電股份有限公司 | Optical imaging lens, image capturing apparatus and electronic device |
-
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- 2018-03-22 JP JP2018054056A patent/JP2019168491A/en active Pending
-
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- 2019-03-19 CN CN201910205549.7A patent/CN110297319B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298195A (en) * | 2010-06-24 | 2011-12-28 | 株式会社理光 | Image-Forming Lens, and Imaging Apparatus and Information Device Using the Image-Forming Lens |
| JP2013073142A (en) * | 2011-09-29 | 2013-04-22 | Fujifilm Corp | Image pickup lens and image pickup apparatus |
| CN106199921A (en) * | 2014-09-12 | 2016-12-07 | 日本电产三协株式会社 | Pantoscope |
| CN107203032A (en) * | 2016-03-16 | 2017-09-26 | Hoya株式会社 | Imaging optical system |
| CN205427290U (en) * | 2016-03-22 | 2016-08-03 | 中山联合光电科技股份有限公司 | Confocal, high pixel of high low temperature, little distortion, no parasitics light optical system |
| CN105866930A (en) * | 2016-06-21 | 2016-08-17 | 中山联合光电科技股份有限公司 | High-definition lens |
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| JP2019168491A (en) | 2019-10-03 |
| CN110297319A (en) | 2019-10-01 |
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