US20200088975A1 - Wide-angle lens and imaging device - Google Patents
Wide-angle lens and imaging device Download PDFInfo
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- US20200088975A1 US20200088975A1 US16/691,679 US201916691679A US2020088975A1 US 20200088975 A1 US20200088975 A1 US 20200088975A1 US 201916691679 A US201916691679 A US 201916691679A US 2020088975 A1 US2020088975 A1 US 2020088975A1
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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
- G02B13/04—Reversed telephoto objectives
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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
- G02B13/001—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
- G02B13/004—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 four 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
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- H04N5/23238—
Abstract
Description
- This application is a divisional application of U.S. application Ser. No. 14/371,944, filed Jul. 11, 2014, the contents of which are incorporated herein by reference.
- The present invention relates to a small-sized and high-resolution wide-angle lens comprising four to six lenses, and an imaging device equipped with the wide-angle lens.
- Patent Document 1 discloses a wide-angle lens mounted on a device such as an on-vehicle camera or surveillance camera. The disclosed wide-angle lens comprises a first lens provided with negative power, a second lens provided with positive power, a third lens provided with negative power, and a fourth lens provided with positive power arranged in the stated order from an object side to an image side. The disclosed wide-angle lens has a diagonal angle of view of about 65°.
- Patent Document 1: JP 2009-14947 A
- It is demanded that a wide-angle lens mounted in an imaging device, such as an on-vehicle camera or surveillance camera, be small-sized and have higher resolution associated with the increasing number of pixels of image pick-up devices mounted in such imaging devices. Aberration, such as curvature of field, must be restrained more than previously to improve the resolution of a wide-angled lens.
- With the foregoing in view, an object of the present invention is to provide a small-sized and more high-resolution wide-angle lens, and an imaging device equipped with such a wide-angle lens.
- To solve the problems, the wide-angle lens of the present invention is characterized in comprising:
- a first group lens having negative power, a second group lens having positive power, a third group lens having negative power, and a fourth group lens having positive power arranged in the stated order from an object side toward an image side;
- the first group lens comprising one lens having negative power or two lenses both having negative power;
- the second group lens comprising one lens having positive power or two lenses both having positive power;
- the third group lens comprising one lens having negative power; and
- the fourth group lens comprising one lens having positive power, wherein
- the lens constituting the first group lens is provided with a concave shape for the lens surface on the image side;
- the lens in the second group lens arranged adjacent to the third group lens is provided with a convex shape for the lens surface on the image side;
- the third group lens is provided with a concave shape for the lens surface on the object side;
- at least one of the lenses constituting the second group lens, the third group lens, and the fourth group lens is made to have an aspherical shape for at least one lens surface among the lens surface on the object side and the lens surface on the image side; and
- the following conditional expression (1) is satisfied,
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1.0≤ff2/f≤2.0 (1) - where f is the focal length of the entire lens system, and ff2 is the focal length of the second group lens.
- Because the wide-angle lens of the present invention satisfies the conditional expression (1), the total length of the lens system can be kept short, and curvature of field can be restrained. Providing the lenses constituting the second group lens, the third group lens, and the fourth group lens with an aspherical shape facilitates enlarging the aperture ratio. At greater than the upper limit of the conditional expression (1), curvature of field increases on the positive side and becomes difficult to correct. At less than the lower limit of the conditional expression (1), curvature of field increases on the negative side and becomes difficult to correct. Also at greater than the upper limit of the conditional expression (1), the positive power of the second group lens becomes weaker, making it difficult to keep the total length of the lens system short. A “wide-angle lens” refers to an imaging lens having a diagonal angle of view of 60° or greater.
- The following conditional expression (2) is preferably satisfied in the present invention, where ff3 is the focal length of the third group lens.
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−2.0≤ff2/ff3≤1.0 (2) - The upper limit of the conditional expression (2) is for restraining chromatic aberration. At greater than the upper limit of the conditional expression (2), the negative power of the third group lens provided with a concave shape becomes excessively weaker than the positive power of the second group lens provided with a convex shape, which increases chromatic aberration, making it difficult to correct. Therefore, the upper limit is made −1.0 or less to restrain chromatic aberration. The lower limit of the conditional expression (2) is for restraining curvature of field and keeping the total length of the lens system short. At less than the lower limit of the conditional expression (2), the negative power of the third group lens provided with a concave shape becomes excessively stronger than the positive power of the second group lens provided with a convex shape, which leads to an increase in curvature of field. Therefore, the lower limit is made −2.0 or greater to restrain curvature of field. Also at less than the lower limit of the conditional expression (2), the positive power of the second group lens becomes weaker than the negative power of the third group lens, making it difficult to keep the total length of the lens system short. Setting the range of the conditional expression (2) to −1.9 to −1.3 can produce a balance between chromatic aberration and curvature of field.
- The following conditional expression (3) is preferably satisfied in the present invention, where ff4 is the focal length of the fourth group lens.
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0.5≤ff4/f≤2.0 (3) - The conditional expression (3) is for restraining curvature of field. Specifically, at greater than the upper limit of the conditional expression (3), curvature of field increases on the positive side and becomes difficult to correct. At less than the lower limit of the conditional expression (3), curvature of field increases on the negative side and becomes difficult to correct. Therefore, this range is made 0.5 to 2.0 to better restrain curvature of field. Setting the range of the conditional expression (3) to 0.7 to 1.7 produces a balance with the image surface.
- To correct chromatic aberration well in the present invention, the second group lens is preferably provided with a lens having an Abbe number of 40 or greater, and the third group lens is preferably provided with a lens having an Abbe number of 35 or less.
- A configuration having a diagonal angle of view of 100° or greater may be employed in the present invention. That is, curvature of field can be restrained even in a wide-angle lens having such a large angle of view.
- Next, an imaging device of the present invention is characterized in having the wide-angle lens, and an image pick-up device arranged in a focal position of the wide-angle lens.
- According to the present invention, because the wide-angle lens has high resolution, an image pick-up device having a large pixel number can be employed as an image pick-up device, and the imaging device can be high resolution. Because the total length of the wide-angle lens can be shortened, the imaging device can be made small.
- According to the wide-angle lens of the present invention, the total length of the lens system can be kept short, and curvature of field can be restrained. Enlarging the aperture ratio is also facilitated.
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FIG. 1 is a block diagram of an imaging lens of Example 1 to which the present invention is applied; -
FIG. 2A is an axial chromatic aberration diagram of the imaging lens ofFIG. 1 ; -
FIG. 2B is a lateral aberration diagram of the imaging lens ofFIG. 1 ; -
FIG. 2C is a curvature of field diagram of the imaging lens ofFIG. 1 ; -
FIG. 2D is a distortion aberration diagram the imaging lens ofFIG. 1 ; -
FIG. 3 is block diagram of an imaging lens of Example 2 to which the present invention is applied; -
FIG. 4A is an axial chromatic aberration diagram of the imaging lens ofFIG. 3 ; -
FIG. 4B is a lateral aberration diagram of the imaging lens ofFIG. 3 ; -
FIG. 4C is a curvature of field diagram of the imaging lens ofFIG. 3 ; -
FIG. 4D is a distortion aberration diagram of the imaging lens ofFIG. 3 ; -
FIG. 5 is a block diagram of an imaging lens of Example 3 to which the present invention is applied; -
FIG. 6A is an axial chromatic aberration diagram of the imaging lens ofFIG. 5 ; -
FIG. 6B is a lateral aberration diagram of the imaging lens ofFIG. 5 ; -
FIG. 6C is a curvature of field diagram of the imaging lens ofFIG. 5 ; -
FIG. 6D is a distortion aberration diagram of the imaging lens ofFIG. 5 ; -
FIG. 7 is a block diagram of an imaging lens of Example 4 to which the present invention is applied; -
FIG. 8A is an axial chromatic aberration diagram of the imaging lens ofFIG. 7 ; -
FIG. 8B is a lateral aberration diagram of the imaging lens ofFIG. 7 ; -
FIG. 8C is a curvature of field diagram of the imaging lens ofFIG. 7 ; -
FIG. 8D is a distortion aberration diagram of the imaging lens ofFIG. 7 ; -
FIG. 9 is a block diagram of an imaging lens of Example 5 to which the present invention is applied; -
FIG. 10A is an axial chromatic aberration diagram of the imaging lens ofFIG. 9 ; -
FIG. 10B is a lateral aberration diagram of the imaging lens ofFIG. 9 ; -
FIG. 10C is a curvature of field diagram of the imaging lens ofFIG. 9 ; -
FIG. 10D is a distortion aberration diagram of the imaging lens ofFIG. 9 ; and -
FIG. 11 is a diagram illustrating an imaging device equipped with an imaging lens. - An imaging lens to which the present invention is applied will be described hereinafter with reference to the appended drawings.
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FIG. 1 is a block diagram of the imaging lens of Example 1. As shown inFIG. 1 , animaging lens 10 comprises afirst group lens 11 having negative power, asecond group lens 12 having positive power, athird group lens 13 having negative power, and afourth group lens 14 having positive power arranged in the stated order from the object side toward the image side. Theimaging lens 10 of the present example has a configuration comprising four lenses, in which thefirst group lens 11 comprises onefirst lens 111, thesecond group lens 12 comprises onesecond lens 121, thethird group lens 13 comprises onethird lens 131, and thefourth group lens 14 comprises onefourth lens 141. Adiaphragm 17 is arranged between thefirst group lens 11 and thesecond group lens 12; that is, between thefirst lens 111 and thesecond lens 121. Acover glass 18 is arranged on the image side of thefourth lens 141. Theimage plane 19 is positioned with a gap between theimage plane 19 and thecover glass 18. - The
first lens 111 is provided with a planar shape for the lens surface on theobject side 111 a, and a concave shape for the lens surface on theimage side 111 b. Thesecond lens 121 is provided with a convex shape for both the lens surface on theobject side 121 a and the lens surface on theimage side 121 b. Thethird lens 131 is provided with a concave shape for the lens surface on theobject side 131 a, and a convex shape for the lens surface on theimage side 131 b. Thefourth lens 141 is provided with a convex shape for both the lens surface on theobject side 141 a and the lens surface on theimage side 141 b. - Where Fno. is the numerical aperture of the
imaging lens 10, ω is the half angle view, and L is the total length of the lens system, these values are as follows. - Fno.=2
- ω=57.5°
- L=12.303 mm
- Where f is the focal length of the entire lens system, ff1 is the focal length of the first group lens 11 (the first lens 111), ff2 is the focal length of the second group lens 12 (the second lens 121), ff3 is the focal length of the third group lens 13 (the third lens 131), and ff4 is the focal length of the fourth group lens 14 (the fourth lens 141), these values are as follows.
- f=1.9748
- ff1=−7.394
- ff2=2.019
- ff3=−1.089
- ff4=1.545
- The
imaging lens 10 of the present example satisfies the following conditional expressions (1)-(3). -
1.0≤ff2/f≤2.0 (1) -
−2.0≤ff2/ff3≤−1.0 (2) -
0.5≤ff4/f≤2.0 (3) - That is, ff2/f=1.02, ff2/ff3=−1.85, and ff4/f=0.78.
- Because the
imaging lens 10 of the present example satisfies the conditional expression (1), the total length of the lens system can be kept short, and curvature of field can be restrained. Specifically, at greater than the upper limit of the conditional expression (1), curvature of field increases on the positive side and becomes difficult to correct. At less than the lower limit of the conditional expression (1), curvature of field increases on the negative side and becomes difficult to correct. Also at greater than the upper limit of the conditional expression (1), the positive power of thesecond group lens 12 is weaker, making it difficult to keep the total length of the lens system short. - Because the
imaging lens 10 satisfies the conditional expression (2), the total length of the lens system can be kept short, and curvature of field can be restrained while restraining chromatic aberration. Specifically, at greater than the upper limit of the conditional expression (2), the negative power of the third group lens provided with aconcave shape 131 becomes excessively weaker than the positive power of the second group lens provided with aconvex shape 12, increasing chromatic aberration and making it difficult to correct. Therefore, the upper limit is made −1.0 or less to restrain chromatic aberration. The lower limit of the conditional expression (2) is for restraining curvature of field and keeping the total length of the lens system short. At less than the lower limit of the conditional expression (2), the negative power of the third group lens provided with aconcave shape 131 becomes excessively stronger than the positive power of the second group lens provided with aconvex shape 12, leading to an increase in curvature of field. Therefore, the lower limit is made −2.0 or greater to restrain curvature of field. At less than the lower limit of the conditional expression (2), the positive power of thesecond group lens 12 becomes weaker than the negative power of thethird group lens 13, making it difficult to keep the total length of the lens system short. Setting the range of the conditional expression (2) to −1.9 to −1.3 can produce a balance between chromatic aberration and curvature of field. - Because the
imaging lens 10 satisfies the conditional expression (3), curvature of field can be better restrained. Specifically, at greater than the upper limit of the conditional expression (3), curvature of field increases on the positive side and becomes difficult to correct. At less than the lower limit of the conditional expression (3), curvature of field increases on the negative side and becomes difficult to correct. Therefore, this range is made 0.5 to 2.0 to better restrain curvature of field. Setting the range of the conditional expression (3) to 0.7 to 1.7 can produce a balance with the image surface. - The following conditional expressions (4) and (5) are satisfied in the present example, where vd2 is the Abbe number of the second group lens 12 (the second lens 121) and vd3 is the Abbe number of the third group lens 13 (the third lens 131).
-
vd≥40 (4) -
vd≤35 (5) - In the present example, vd2=52 and vd3=23.4. As a result, chromatic aberration can be corrected well with the
imaging lens 10 because thesecond lens 121 comprising a material of low dispersion is arranged adjacent to thethird lens 131 comprising a material of high dispersion. - Next, Table 1A shows lens data of the lens surfaces of the
imaging lens 10. Table 1A specifies the lens surfaces in order counting from the object side. Lens surfaces marked with asterisks are aspherical surfaces. In the present example, the lens surfaces on theobject side image side diaphragm 17. The 9th and 10th surfaces are glass surfaces of thecover glass 18. The unit for the radius of curvature and the gap is millimeters. -
TABLE 1A Nd Vd Radius of (refractive (Abbe Surface No. curvature Gap index) number) 1st surface Infinity 1.000 1.15168 64.2 2nd surface 3.835 4.726 3rd surface S Infinity −0.036 4th surface * 2.106 1.279 1.5346 56.0 5th surface * −1.760 0.513 6th surface * −0.633 0.431 1.6319 23.4 7th surface * −8.915 0.057 8th surface * 0.949 1.108 1.5346 56.0 9th surface * −3.890 0.631 10th surface Infinity 0.300 1.5168 64.2 11th surface Infinity 0.872 - Next, Table 1B indicates aspherical coefficients for prescribing the aspherical shape of a lens surface made to have an aspherical shape. Table 1B likewise specifies the lens surfaces in order counting from the object side.
-
TABLE 1B Fourth Fifth Sixth Seventh Eighth Ninth Surface Surface Surface Surface Surface Surface K −27.28282 1.00817 −2.355196 50.90771 −11.43756 −4.732964 A4 2.89094E−01 −4.91304E−02 −2.41659E−01 −5.11864E−01 8.08884E−03 9.15869E−02 A6 −6.15595E−01 5.14099E−02 3.16267E−01 1.43965E+00 4.3844E−02 −6.14929E−02 A8 7.23663E−01 −6.30732E−02 1.31348E−01 −2.05869E+00 −5.83106E−02 3.51186E−02 A10 −4.60752E−01 2.37616E−02 −8.28993E−01 1.78101E+00 3.22554E−02 −1.26469E−02 A12 0.00000E+00 0.00000E+00 8.33710E−01 −8.46702E−01 −7.77033E−03 1.74905E−03 A14 0.00000E+00 0.00000E+00 −2.59305E−01 1.71228E−01 −1.21963E−04 2.83005E−05 A16 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 2.25513E−04 −2.22343E−05 - The aspherical shape employed for a lens surface is expressed by the following formula, where Y is the sag, c is the inverse of the radius of curvature, K is the constant of the cone, h is the ray height, and A4 is the fourth-order, A6 the sixth-order, A8 the eighth-order, A10 the tenth-order, A12 the twelfth-order, A14 the fourteenth-order, and A16 the sixteenth-order aspherical coefficient.
-
-
FIG. 2A-2D are an axial chromatic aberration diagram, a lateral aberration diagram, a curvature of field diagram, and a distortion aberration diagram of theimaging lens 10. The axial chromatic aberration diagram ofFIG. 2A shows focal shift, and shows the wavelength on the vertical axis. The lateral aberration diagram ofFIG. 2B shows the coordinates of the entrance pupil on the horizontal axis, and the degree of aberration on the vertical axis.FIG. 2B shows the results of a simulation carried out for a plurality of rays of different wavelengths. The curvature of field diagram ofFIG. 2C shows distance in the optical axis direction on the horizontal axis, and the height of the image on the vertical axis. InFIG. 2C , S indicates curvature of field aberration in the sagittal plane, and T indicates curvature of field aberration in the tangential plane. The distortion aberration diagram ofFIG. 2D shows the degree of strain of the image on the horizontal axis, and the height of the image on the vertical axis. As shown inFIG. 2A , axial chromatic aberration is corrected well according to theimaging lens 10 of the present example. As shown inFIG. 2B , color bleeding is restrained. As shown inFIGS. 2C and 2D , curvature of field is corrected well. Therefore, theimaging lens 10 has high resolution. - Because the second lens 121 (the second group lens 12), the third lens 131 (the third group lens 13), the fourth lens 141 (the fourth group lens 14) are provided with aspherical shapes for the lens surfaces on the
object side image side imaging lens 10 takes on a bright configuration. The total length of the lens system L can also be restrained to a short 12.303 mm in the present example. -
FIG. 3 is a block diagram of theimaging lens 20 of Example 2. As shown inFIG. 3 , theimaging lens 20 comprises afirst group lens 21 having negative power, asecond group lens 22 having positive power, athird group lens 23 having negative power, and afourth group lens 24 having positive power arranged in the stated order from the object side toward the image side. Theimaging lens 20 of the present example has a configuration comprising five lenses, where thefirst group lens 21 comprises onefirst lens 211, thesecond group lens 22 comprises two lenses of asecond lens 221 and athird lens 222, athird group lens 23 comprises onefourth lens 231, and afourth group lens 24 comprises onefifth lens 241. Adiaphragm 27 is arranged between thesecond lens 221 andthird lens 222 in thesecond group lens 22. Acover glass 28 is arranged on the image side of thefifth lens 241. Theimage plane 29 is positioned with a gap between theimage plane 29 and thecover glass 28. - The
first lens 211 is provided with a planar shape for the lens surface on theobject side 211 a, and a concave shape for the lens surface on theimage side 211 b. Thesecond lens 221 is provided with a convex shape for both the lens surface on theobject side 221 a and the lens surface on theimage side 221 b. Thethird lens 222 is provided with a convex shape for both the lens surface on theobject side 222 a and the lens surface on theimage side 222 b. Thefourth lens 231 is provided with a concave shape for the lens surface on theobject side 231 a, and a convex shape for the lens surface on theimage side 231 b. Thefifth lens 241 is provided with a convex shape for both the lens surface on theobject side 241 a and the lens surface on theimage side 241 b. - Where Fno. is the numerical aperture of the
imaging lens 20, ω is the half angle view, and L is the total length of the lens system, these values are as follows. - Fno.=2
- ω=69.0°
- L=12.300 mm
- Where f is the focal length of the entire lens system, ff1 is the focal length of the first group lens 21 (the first lens 221), ff2 is the focal length of the second group lens 22 (the
second lens 221 and the third lens 222), ff3 is the focal length of the third group lens 23 (the fourth lens 231), and ff4 is the focal length of the fourth group lens 24 (the fifth lens 241), these values are as follows. - f=1.9055
- ff1=−3.430
- ff2=2.059
- ff3=−1.481
- ff4=2.451
- Where ff21 is the focal length of the
second lens 221 comprising thesecond group lens 22, and ff22 is the focal length of thethird lens 222, these values are as follows. - ff21=4.080
- ff22=2.685
- The
imaging lens 20 of the present examples satisfies the following conditional expressions (1)-(3). -
1.0≤ff2/f=1.08≤2.0 (1) -
−2.0≤ff2/ff3=−1.39≤−1.0 (2) -
0.5≤ff4/f=1.29≤2.0 (3) - The following conditional expressions (4) and (5) are satisfied in the present example, where vd2 is the Abbe number of the
third lens 222, which has the higher Abbe number of thesecond lens 221 and thethird lens 222 comprising thesecond group lens 22, and vd3 the Abbe number of the third group lens (the fourth lens 231). -
vd2=56≥40 (4) -
vd3=23.4≤35 (5) - Next, Table 2A shows lens data of the lens surfaces of the
imaging lens 20. Table 2A specifies the lens surfaces in order counting from the object side. Lens surfaces marked with asterisks are aspherical surfaces. In the present example, the lens surfaces on theobject side image side third lens 222, the fourth lens 231 (the third group lens 23), and the fifth lens 241 (the fourth group lens 24) are provided with aspherical shapes. S indicates the diaphragm. 27. The 12th and 13th surfaces are the glass surfaces of thecover glass 28. The unit for the radius of curvature and the gap is millimeters. -
TABLE 2A Nd Vd Radius of (refractive (Abbe Surface No. curvature Gap index) number) 1st surface Infinity 1.005 1.5891 61.3 2nd surface 2.029 2.846 3rd surface 7.134 1.804 1.6477 33.8 4th surface −3.822 0.042 5th surface S Infinity 0.058 6th surface * 44.135 1.471 1.5346 56.0 7th surface * −1.473 0.386 8th surface * −0.828 0.482 1.6323 23.4 9th surface * −8.142 0.100 10th surface * 3.144 1.423 1.5346 56.0 11th surface * −1.905 0.100 12th surface Infinity 0.300 1.5168 64.2 13th surface Infinity 2.207 - Next, Table 2B indicates aspherical coefficients for prescribing the aspherical shape of a lens surface made to have an aspherical shape. Table 2B likewise specifies the lens surfaces in order counting from the object side.
-
TABLE 2B Sixth Seventh Eighth Ninth Tenth Eleventh Surface Surface Surface Surface Surface Surface K −33.86235 −4.524449 −0.6534266 14.03202 2.128012 0 A4 −3.50474E−02 −1.27565E−01 3.64349E−01 3.25046E−02 −2.54735E−01 8.43204E−03 A6 9.71551E−03 7.82738E−02 −1.21525E−01 8.10461E−02 3.12620E−01 1.06866E−02 A8 −2.43483E−02 −5.46723E−02 −8.19386E−02 −1.01145E−01 −3.04821E−01 −1.15984E−02 A10 7.63834E−04 1.26404E−02 1.54306E−01 4.57183E−02 2.00014E−01 7.74896E−03 A12 5.97866E−03 0.00000E+00 −8.41133E−02 −8.55866E−03 −8.51187E−02 −2.07850E−03 A14 −8.87636E−03 0.00000E+00 2.02896E−02 4.42919E−04 2.07222E−02 1.16093E−04 A16 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 −2.15500E−03 3.42064E−05 - Because the
imaging lens 20 of the present example satisfies the conditional expressions (1)-(3), the total length of the lens system can be kept short, and curvature of field and chromatic aberration can be restrained. Chromatic aberration can also be corrected well in the present example because the thirdsecond lens 222 comprising a material of low dispersion is arranged adjacent to thefourth lens 231 comprising a material of high dispersion. - The
third lens 222 of thesecond group lens 22, the fourth lens 231 (the third group lens 23), and the fifth lens 241 (the fourth group lens 24) in the present example are provided with aspherical shapes for the lens surfaces on theobject side image side imaging lens 20 takes on a bright configuration. The total length of the lens system L can also be restrained to a short 12.300 mm in the present example. -
FIGS. 4A-4D are an axial chromatic aberration diagram, a lateral aberration diagram, a curvature of field diagram, and a distortion aberration diagram of theimaging lens 20. As shown inFIG. 4A , axial chromatic is corrected well according to theimaging lens 20 of the present example. As shown inFIG. 4B , color bleeding is restrained. As shown inFIGS. 4C and 4D , curvature of field is corrected well. Therefore, theimaging lens 20 has high resolution. -
FIG. 5 is a block diagram of theimaging lens 30 of Example 3. As shown inFIG. 5 , theimaging lens 30 comprises afirst group lens 31 having negative power, asecond group lens 32 having positive power, athird group lens 33 having negative power, and afourth group lens 34 having positive power arranged in the stated order from the object side toward the image side. Theimaging lens 30 of the present example has a configuration comprising five lenses, where thefirst group lens 31 comprises onefirst lens 311, thesecond group lens 32 comprises two lenses of asecond lens 321 and athird lens 322, thethird group lens 33 comprises onefourth lens 331, and thefourth group lens 34 comprises onefifth lens 341. Adiaphragm 37 is arranged between thesecond lens 321 and thethird lens 322 in thesecond group lens 32. Acover glass 38 is arranged on the image side of thefifth lens 341. Theimage plane 39 is positioned with a gap between theimage plane 39 and thecover glass 38. - The
first lens 311 is provided with a planar shape for the lens surface on theobject side 311 a, and a concave shape for the lens surface on theimage side 311 b. Thesecond lens 321 is provided with a convex shape for both the lens surface on theobject side 321 a and the lens surface on theimage side 321 b. Thethird lens 322 is provided with a convex shape for both the lens surface on theobject side 322 a and the lens surface on theimage side 322 b. Thefourth lens 331 is provided with a concave shape for the lens surface on theobject side 331 a, and a convex shape for the lens surface on theimage side 331 b. Thefifth lens 341 is provided with a convex shape for both the lens surface on theobject side 341 a and the lens surface on theimage side 341 b. - Where Fno. is the numerical aperture of the
imaging lens 30, ω is the half angle view, and L is the total length of the lens system, these values are as follows. - Fno.=2
- ω=56.5°
- L=12.303 mm
- Where f is the focal length of the entire lens system, ff1 is the focal length of the first group lens 31 (the first lens 311), ff2 is the focal length of the second group lens 32 (the
second lens 321 and the third lens 322), ff3 is the focal length of the third group lens 33 (the fourth lens 331), and ff4 is the focal length of the fourth group lens 34 (the fifth lens 341), these values are as follows. - f=1.986
- ff1=−6.278
- ff2=2.321
- ff3=−1.602
- ff4=2.206
- Where ff21 is the focal length of the
second lens 321 comprising thesecond group lens 32, and ff22 is the focal length of thethird lens 322, these values are as follows. - ff21=5.442
- ff22=2.766
- The
imaging lens 30 of the present examples satisfies the following conditional expressions (1)-(3). -
1.0≤ff2/f=1.17≤2 (1) -
−2.0≤ff2/ff3=−1.38≤−1.0 (2) -
0.5≤ff4/f=1.11≤2.0 (3) - The following conditional expressions (4) and (5) are satisfied in the present example, where vd2 is the Abbe number of the
third lens 322, which has the larger of Abbe number of thesecond lens 321 and thethird lens 322 comprising thesecond group lens 32, and vd3 is the Abbe number of the third group lens 33 (the fourth lens 331). -
vd2=56≥40 (4) -
vd3=23.4≤35 (5) - Next, Table 3A shows lens data of the lens surfaces of the
imaging lens 30. Table 3A specifies the lens surfaces in order counting from the object side. Lens surfaces marked with asterisks are aspherical surfaces. In the present example, the lens surfaces on theobject side image side third lens 322, fourth lens 331 (the third group lens 33), and the fifth lens 341 (the fourth group lens 34) are provided with aspherical shapes. S indicates thediaphragm 37. The 12th and 13th surfaces are the glass surfaces of thecover glass 38. The unit for the radius of curvature and the gap is millimeters. -
TABLE 3A Nd Vd Radius of (refractive (Abbe Surface No. curvature Gap index) number) 1st surface Infinity 1.410 1.5168 64.2 2nd surface 3.256 4.207 3rd surface 4.348 1.429 1.6200 36.4 4th surface −13.567 0.100 5th surface S Infinity 0.101 6th surface * 4.090 1.119 1.5346 56.0 7th surface * −2.109 0.386 8th surface * −0.633 0.484 1.6323 23.4 9th surface * −2.152 0.087 10th surface * 1.414 1.056 1.5346 56.0 11th surface * −5.405 0.100 12th surface Infinity 0.300 1.5168 64.2 13th surface Infinity 1.406 - Next, Table 3B indicates aspherical coefficients for prescribing the aspherical shape of a lens surface made to have an aspherical shape. Table 3B likewise specifies the lens surfaces in order counting from the object side.
-
TABLE 3B Sixth Seventh Eighth Ninth Tenth Eleventh Surface Surface Surface Surface Surface Surface K −76.1177 −31.1790 −1.2321 1.8229 −24.0941 0.0000 A4 8.93944E−02 −4.55920E−01 7.10750E−02 −3.45248E−01 1.64176E−02 3.16849E−03 A6 −1.76226E−01 4.64097E−01 2.58089E−01 1.41096E+00 3.65178E−02 1.37311E−02 A8 1.06904E−01 −3.27719E−01 9.32169E−02 −2.00748E+00 −5.64218E−02 −4.94053E−03 A10 −6.20285E−02 9.82264E−02 −7.27773E−01 1.71460E+00 2.60727E−02 −3.06896E−03 A12 0.00000E+00 0.00000E+00 6.90419E−01 −8.10550E−01 −2.38309E−03 1.71232E−03 A14 0.00000E+00 0.00000E+00 −2.01703E−01 1.64603E−01 −1.58029E−03 −1.83080E−04 A16 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 3.25406E−04 −2.12665E−05 - Because the
imaging lens 30 of the present example satisfies the conditional expressions (1)-(3), the total length of the lens system can be kept short, and curvature of field and chromatic aberration can be restrained. Chromatic aberration can also be corrected well in the present example because thethird lens 322 comprising a material of low dispersion is arranged adjacent to thefourth lens 331 comprising a material of high dispersion. - The
third lens 322 of thesecond group lens 32, the fourth lens 331 (the third group lens 33), and the fifth lens 341 (the fourth group lens 34) in the present example are provided with aspherical shapes on the lens surfaces on theobject side image side imaging lens 30 takes on a bright configuration. The total length of the lens system L can also be restrained to a short 12.303 mm in the present example. -
FIG. 6A-6D are an axial chromatic aberration diagram, a lateral aberration diagram, a curvature of field diagram, and a distortion aberration diagram of theimaging lens 30. As shown inFIG. 6A , axial chromatic is corrected well according to theimaging lens 30 of the present example. As shown inFIG. 6B , color bleeding is restrained. As shown inFIGS. 6C and 6D , curvature of field is corrected well. Therefore, theimaging lens 30 has high resolution. -
FIG. 7 is a block diagram of theimaging lens 40 of Example 4. As shown inFIG. 7 , theimaging lens 40 comprises afirst group lens 41 having negative power, asecond group lens 42 having positive power, athird group lens 43 having negative power, and afourth group lens 44 having positive power arranged in the stated order from the object side toward the image side. Theimaging lens 40 of the present example has a configuration comprising five lenses, where thefirst group lens 41 comprises two lenses of afirst lens 411 and asecond lens 412, thesecond group lens 42 comprises onethird lens 421, thethird group lens 43 comprises onefourth lens 431, and thefourth group lens 44 comprises onefifth lens 441. Adiaphragm 47 is arranged between thefirst group lens 41 and thesecond group lens 42; that is, between thesecond lens 412 and thethird lens 421. Acover glass 48 is arranged on the image side of thefifth lens 441. Theimage plane 49 is positioned with a gap between theimage plane 49 and thecover glass 48. - The
first lens 411 is provided with a convex shape for the lens surface on theobject side 411 a, and a concave shape for the lens surface on theimage side 411 b. Thesecond lens 412 is provided with a convex shape for the lens surface on theobject side 412 a, and a concave shape for the lens surface on theimage side 412 b. Thethird lens 421 is provided with a convex shape for both the lens surface on theobject side 421 a and the lens surface on theimage side 421 b. Thefourth lens 431 is provided with a concave shape for the lens surface on theobject side 431 a, and a convex shape for the lens surface on theimage side 431 b. Thefifth lens 441 is provided with a convex shape for both the lens surface on theobject side 441 a and the lens surface on theimage side 441 b. - Where Fno. is the numerical aperture of the
imaging lens 40, ω is the half angle view, and L is the total length of the lens system, these values are as follows. - Fno.=2.4
- ω=95°
- L=11.16 mm
- Where f is the focal length of the entire lens system, ff1 is the focal length of the first group lens 41 (the
first lens 411 and the second lens 412), ff2 is the focal length of the second group lens 42 (the third lens 421), ff3 is the focal length of the third group lens 43 (the fourth lens 431), and ff4 is the focal length of the fourth group lens 44 (the fifth lens 441), these values are as follows. - f=1.376
- ff1=−4.394
- ff2=1.754
- ff3=−1.114
- ff4=1.446
- Where ff11 is the focal length of the
first lens 41 comprising thefirst group lens 41, and ff12 is the focal length of thesecond lens 412, these values are as follows. - ff11=−11.304
- ff12=−8.279
- The
imaging lens 40 satisfies the following conditional expressions (1)-(3). -
1.0≤ff2/f=1.27≤2.0 (1) -
−2.0≤ff2/ff3=−1.57≤−1.0 (2) -
0.5≤ff4/f=1.05≤2.0 (3) - The following conditional expressions (4) and (5) are satisfied in the present example, where vd2 is the Abbe number of the second group lens 42 (the third lens 421), and vd3 is the Abbe number of the third group lens 43 (the fourth lens 431).
-
vd2=56≥40 (4) -
vd3=23.4≤35 (5) - Next, Table 4A shows lens data of the lens surfaces of the
imaging lens 40. Table 4A specifies the lens surfaces in order counting from the object side. Lens surfaces marked with asterisks are aspherical surfaces. In the present example, the lens surfaces on theobject side image side second lens 412, the third lens 421 (the third group lens 43), the fourth lens 431 (the third group lens 43), and the fifth lens 441 (the fourth group lens 44) have been provided with aspherical shapes. S indicates thediaphragm 47. The 12th and 13th surfaces are the glass surfaces of thecover glass 48. The unit for the radius of curvature and the gap is millimeters. -
TABLE 4A Nd Vd Radius of (refractive (Abbe Surface No. curvature Gap index) number) 1st surface 14.550 1.000 1.5168 64.2 2nd surface 4.081 1.400 3rd surface * 40.204 0.800 1.5346 56.0 4th surface * 3.975 3.514 5th surface S Infinity 0.076 6th surface * 1.848 0.957 1.5346 56.0 7th surface * −1.573 0.738 8th surface * −0.646 0.511 1.6319 23.4 9th surface * −9.274 0.096 10th surface * 0.977 0.952 1.5346 56.0 11th surface * −2.496 0.631 12th surface Infinity 0.300 1.5168 64.2 13th surface Infinity 0.185 - Next, Table 4B shows the aspherical coefficients of the lens surfaces of the
second lens 412, and Table 4C shows the aspherical coefficients of the lens surfaces of thethird lens 421, thefourth lens 431, and thefifth lens 441. Table 4B and 4C likewise specify the lens surfaces in order counting from the object side. -
TABLE 4B Third Fourth Surface Surface K 0.94197 0.0000 A4 −8.31314E−04 −1.99687E−03 A6 0.00000E+00 0.00000E+00 A8 −8.37785E−06 2.20270E−04 A10 0.00000E+00 0.00000E+00 A12 0.00000E+00 0.00000E+00 A14 0.00000E+00 0.00000E+00 A16 0.00000E+00 0.00000E+00 -
TABLE 4C Sixth Seventh Eighth Ninth Tenth Eleventh Surface Surface Surface Surface Surface Surface K −18.2384 0.9139 −2.7300 52.1381 −10.6356 −9.5943 A4 2.46187E−01 −3.32402E−02 −2.41999E−01 −5.04485E−01 1.85174E−03 9.47311E−02 A6 −6.42345E−01 5.25652E−02 2.78515E−01 1.43769E+00 4.44951E−02 −6.16763E−02 A8 7.20341E−01 −9.67462E−02 9.90897E−02 −2.06043E+00 −5.78888E−02 3.49914E−02 A10 −5.70160E−01 −9.46137E−04 −8.31946E−01 1.78188E+00 3.23753E−02 −1.26670E−02 A12 0.00000E+00 0.00000E+00 8.60049E−01 −8.45602E−01 −7.75381E−03 1.74547E−03 A14 0.00000E+00 0.00000E+00 −2.11841E−01 1.70771E−01 −1.28007E−04 2.67588E−05 A16 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 2.19284E−04 −2.30456E−05 - Because the
imaging lens 40 of the present example satisfies the conditional expression (1)-(3), the total length of the lens system can be kept short, and curvature of field and chromatic aberration can be restrained. Chromatic aberration can also be corrected well in the present example because thethird lens 421 comprising a material of low dispersion is arranged adjacent to thefourth lens 431 comprising a material of high dispersion. - The
second lens 412, the third lens 421 (the second group lens 42), the fourth lens 431 (the third group lens 43), and the fifth lens 441 (the fourth group lens 44) in the present example are provided aspherical shapes for the lens surfaces on theobject side image side imaging lens 40 takes on a bright configuration. The total length of the lens system L can also be restrained to a short 11.16 mm in the present example. -
FIGS. 8A-8D are an axial chromatic aberration diagram, a lateral aberration diagram, a curvature of field diagram, and a distortion aberration diagram of theimaging lens 40. As shown inFIG. 8A , axial chromatic is corrected well according to theimaging lens 40 of the present example. As shown inFIG. 8B , color bleeding is restrained. As shown inFIGS. 8C and 8D , curvature of field is corrected well. Therefore, theimaging lens 40 has high resolution. -
FIG. 9 is a block diagram of theimaging lens 50 of Example 5. As shown inFIG. 9 , theimaging lens 50 comprises afirst group lens 51 having negative power, asecond group lens 52 having positive power, athird group lens 53 having negative power, and afourth group lens 54 having positive power arranged in the stated order from the object side toward the image side. Theimaging lens 50 of the present example has a configuration comprising six lenses, where thefirst group lens 51 comprises two lenses of afirst lens 511 and asecond lens 512, thesecond group lens 52 comprises two lenses of athird lens 521 and afourth lens 522, thethird group lens 53 comprises onefifth lens 531, and thefourth group lens 54 comprises onesixth lens 541. Adiaphragm 57 is arranged between thethird lens 521 and thefourth lens 522 comprising thesecond group lens 52. Acover glass 58 is arranged on the image side of thesixth lens 541. Theimage plane 59 is positioned with a gap between theimage plane 59 and thecover glass 58. - The
first lens 511 is provided with a convex shape for the lens surface on theobject side 511 a, and a concave shape for the lens surface on theimage side 511 b. Thesecond lens 512 is provided with a concave shape for both the lens surface on theobject side 512 a and the lens surface on theimage side 512 b. Thethird lens 521 is provided with a convex shape for both the lens surface on theobject side 521 a and the lens surface on theimage side 521 b. Thefourth lens 522 is provided with a convex shape for both the lens surface on theobject side 522 a and the lens surface on theimage side 522 b. Thefifth lens 531 is provided with a concave shape for the lens surface on theobject side 531 a, and a convex shape for the lens surface on theimage side 531 b. Thesixth lens 541 is provided with a convex shape for both the lens surface on theobject side 541 a and the lens surface on theimage side 541 b. - Where Fno. is the numerical aperture of the
imaging lens 50, ω is the half angle view, and L is the total length of the lens system, these values are as follows. - Fno.=2.2
- ω=72.8°
- L=15.57 mm
- Where f is the focal length of the entire lens system, ff1 is the focal length of the first group lens 51 (the
first lens 511 and the second lens 512), ff2 is the focal length of the second group lens 52 (thethird lens 521 and the fourth lens 522), ff3 is the focal length of the third group lens 53 (the fifth lens 531), and ff4 is the focal length of the fourth group lens 54 (the sixth lens 541), these values are as follows. - f=1.356
- ff1=−3.279
- ff2=2.459
- ff3=−1.602
- ff4=2.183
- Where ff11 is the focal length of the
first lens 511 comprising thefirst group lens 51, ff12 is the focal length of thesecond lens 512, ff21 is the focal length of thethird lens 521 comprising thesecond group lens 52, and ff22 is the focal length of thefourth lens 522, these values are as follows. - ff11=−14.13
- ff12=−4.958
- ff21=3.649
- ff22=2.793
- The
imaging lens 50 of the present example satisfies the following conditional expressions (1)-(3). -
1.0≤ff2/f=1.81≤2.0 (1) -
−2.0≤ff2/ff3=−1.53≤−1.0 (2) -
0.5≤ff4/f=1.61≤2.0 (3) - The following conditional expressions (4) and (5) are satisfied in the present example, where vd2 is the Abbe number of the
fourth lens 522, which has the highest Abbe number in the second group lens 52 (thethird lens 521 and the fourth lens 522), and vd3 is the Abbe number of the third group lens 53 (the fifth lens 531). -
vd2=56≤40 (4) -
vd3=23.4≤35 (5) - Next, Table 5A shows lens data of the lens surfaces of the
imaging lens 50. Table 5A specifies the lens surfaces in order counting from the object side. Lens surfaces marked with asterisks are aspherical surfaces. In the present example, the lens surfaces on theobject side image side second lens 512, thefourth lens 522 of thethird group lens 53, the fifth lens 531 (the third group lens 53), and the sixth lens 541 (the fourth group lens 54) have been provided with aspherical shapes. S indicates thediaphragm 57. The 14th and 15th surfaces are the glass surfaces of thecover glass 58. The unit for the radius of curvature and the gap is millimeters. -
TABLE 5A Nd Vd Radius of (refractive (Abbe Surface No. curvature Gap index) number) 1st surface 20.108 1.000 1.5168 64.2 2nd surface 5.280 1.916 3rd surface * −40.323 1.000 1.5346 56.0 4th surface * 2.875 4.468 5th surface 2.566 2.755 1.6200 36.4 6th surface −11.880 0.100 7th surface S Infinity 0.101 8th surface * 4.090 1.277 1.5346 56.0 9th surface * −2.109 0.198 10th surface * −0.633 0.484 1.6322 23.4 11th surface * −2.152 0.087 12th surface * 1.414 0.860 1.5346 56.0 13th surface * −5.405 0.100 14th surface Infinity 0.300 15th surface Infinity 0.825 - Next, Table 5B shows the aspherical coefficients of the lens surfaces of the
second lens 512, and Table 5C shows the aspherical coefficients of the lens surfaces of thefourth lens 522, thefifth lens 531, and thesixth lens 541. Table 5B, Table 5C likewise specifies the lens surfaces in order counting from the object side. -
TABLE 5B Third Fourth Surface Surface K 0.0000 0.3272 A4 1.22135E−03 −1.50493E−04 A6 0.00000E+00 0.00000E+00 A8 0.00000E+00 0.00000E+00 A10 0.00000E+00 0.00000E+00 A12 0.00000E+00 0.00000E+00 A14 0.00000E+00 0.00000E+00 A16 0.00000E+00 0.00000E+00 -
TABLE 5C Eighth Ninth Tenth Eleventh Twelfth Thirteenth Surface Surface Surface Surface Surface Surface K −33.4283 −24.4263 −1.6077 1.8118 −20.8115 0.0000 A4 1.11999E−02 −4.94861E−01 1.00494E−01 −2.59338E−01 −7.72364E−02 −4.23518E−02 A6 −5.61040E−02 5.72189E−01 2.21374E−01 1.36070E+00 5.24617E−02 −3.40797E−03 A8 −1.66559E−02 −2.99204E−01 1.00065E−01 −2.00144E+00 −6.43273E−02 1.89923E−04 A10 2.86662E−03 8.09019E−02 −6.90465E−01 1.71902E+00 2.62442E−02 −2.39820E−03 A12 0.00000E+00 0.00000E+00 7.22800E−01 −8.12671E−01 −6.30518E−04 1.51250E−03 A14 0.00000E+00 0.00000E+00 −2.40809E−01 1.66304E−01 −8.85557E−04 −2.71444E−04 A16 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 1.81016E−04 6.68224E−05 - Because the
imaging lens 50 of the present example satisfies the conditional expression (1)-(3), the total length of the lens system can be kept short, and curvature of field and chromatic aberration can be restrained. Chromatic aberration can also be corrected well in the present example because thefourth lens 522 comprising a material of low dispersion is arranged adjacent to thefifth lens 531 comprising a material of high dispersion. - The
second lens 512, thefourth lens 522 of thesecond group lens 52, the fifth lens 531 (the third group lens 53), and the sixth lens 541 (the fourth group lens 54) in the present example are provided with aspherical shapes for the lens surfaces on theobject side image side imaging lens 50 takes on a bright configuration. The total length of the lens system. L can also be restrained to a short 15.57 mm in the present example. -
FIG. 10A-10D are an axial chromatic aberration diagram, a lateral aberration diagram, a curvature of field diagram, and a distortion aberration diagram of theimaging lens 50. As shown inFIG. 10A , axial chromatic is corrected well according to theimaging lens 50 of the present example. As shown inFIG. 10B , color bleeding is restrained. As shown inFIGS. 10C and 10D , curvature of field is corrected well. Therefore, theimaging lens 50 has high resolution. -
FIG. 11 is a diagram illustrating animaging device 60 equipped with theimaging lens 10. As shown inFIG. 11 , theimaging device 60 is provided with an image pick-up device 61 having asensor surface 61 a arranged on the image plane 19 (the focal position) of theimaging lens 10. The image pick-up device 61 is a CCD sensor or a cMOS sensor. - According to the present example, because the
imaging lens 10 has high resolution, theimaging device 60 can be made high-resolution by employing an image pick-up device 61 having a large pixel number as the image pick-up device 61. Because the total length of the lens system of theimaging lens 10 is a short length L, theimaging device 60 can also be made small-sized. Theimaging lenses imaging device 60 in the same manner as theimaging lens 10, and can obtain the same effects when so mounted. -
-
10, 20, 30, 40, 50 Imaging lens example 11, 21, 31, 41, 51 First group lens 12, 22, 32, 42, 52 Second group lens 13, 23, 33, 43, 53 Third group lens 14, 24, 34, 44, 54 Fourth group lens 17, 27, 37, 47, 57 Diaphragm 18, 28, 38, 48, 58 Cover glass 19, 29, 39, 49, 59 Image plane 60 Imaging device 61 Image pick-up device 61a Sensor surface
Claims (3)
−1.9≤ff2/ff3≤−1.3.
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US201414371944A | 2014-07-11 | 2014-07-11 | |
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2013
- 2013-02-22 US US14/371,944 patent/US10527826B2/en active Active
- 2013-02-22 WO PCT/JP2013/001035 patent/WO2013125248A1/en active Application Filing
- 2013-02-22 CN CN201380010631.5A patent/CN104126142B/en active Active
- 2013-02-22 KR KR1020147024839A patent/KR20140126365A/en not_active Application Discontinuation
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2019
- 2019-11-22 US US16/691,679 patent/US20200088975A1/en not_active Abandoned
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US20080144193A1 (en) * | 2006-06-14 | 2008-06-19 | Sony Corporation | Image capturing lens and imaging apparatus |
US20110096221A1 (en) * | 2009-10-28 | 2011-04-28 | Largan Precision Co., Ltd. | Photographing optical lens assembly |
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Also Published As
Publication number | Publication date |
---|---|
CN104126142A (en) | 2014-10-29 |
WO2013125248A1 (en) | 2013-08-29 |
US10527826B2 (en) | 2020-01-07 |
JP2013174740A (en) | 2013-09-05 |
JP5893437B2 (en) | 2016-03-23 |
CN104126142B (en) | 2016-08-24 |
KR20140126365A (en) | 2014-10-30 |
US20150049166A1 (en) | 2015-02-19 |
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