WO2013132915A1 - Imaging lens and imaging device - Google Patents

Imaging lens and imaging device Download PDF

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Publication number
WO2013132915A1
WO2013132915A1 PCT/JP2013/051677 JP2013051677W WO2013132915A1 WO 2013132915 A1 WO2013132915 A1 WO 2013132915A1 JP 2013051677 W JP2013051677 W JP 2013051677W WO 2013132915 A1 WO2013132915 A1 WO 2013132915A1
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WO
WIPO (PCT)
Prior art keywords
lens
imaging
object side
imaging lens
image side
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Application number
PCT/JP2013/051677
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French (fr)
Japanese (ja)
Inventor
松井一生
Original Assignee
コニカミノルタ株式会社
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Application filed by コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Priority to CN201380012700.6A priority Critical patent/CN104169772A/en
Publication of WO2013132915A1 publication Critical patent/WO2013132915A1/en

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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
    • G02B13/0035—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 three lenses

Definitions

  • the present invention relates to an imaging lens suitable for an imaging apparatus using a solid-state imaging device such as a CCD (Charge-Coupled Device) type image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) type image sensor, and an imaging apparatus using the imaging lens. It is.
  • a solid-state imaging device such as a CCD (Charge-Coupled Device) type image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) type image sensor
  • CMOS Complementary Metal-Oxide Semiconductor
  • image sensors used in these image pickup apparatuses solid-state image sensors such as CCD (Charge Coupled Device) type image sensors and CMOS (Complementary Metal-Oxide Semiconductor) type image sensors are used.
  • CCD Charge Coupled Device
  • CMOS Complementary Metal-Oxide Semiconductor
  • the pixel pitch of the image sensor has been miniaturized, and higher resolution and higher performance have been achieved by increasing the number of pixels.
  • the image sensor may be downsized while maintaining the pixels.
  • an increasing number of mobile terminals have a so-called videophone function that captures an image of a user who uses a mobile terminal, transmits the image to the other party, and displays the images of the other party having a conversation with each other. For this reason, in addition to the main camera, there are many portable terminals provided with a sub camera for photographing the user himself.
  • Patent Documents 1 and 2 propose imaging lenses having three lens blocks.
  • the imaging lens used when the mobile terminal or the like has a videophone function has not only the wide-angle performance necessary for photographing a user at a short distance using the mobile terminal or the like, for example.
  • the pixel pitch of the solid-state imaging device used in the imaging device for the sub camera is becoming smaller, there is a situation that a brighter F number is required to be secured.
  • the lens described in Patent Document 1 has a problem that the F-number is dark as well as not achieving the wide-angle performance necessary for such applications.
  • the present invention has been made in view of such a problem, and is suitable for a portable terminal.
  • An imaging lens having a low profile, a wide angle, and a bright F number, and having excellent aberration characteristics, and an imaging using the imaging lens.
  • An object is to provide an apparatus.
  • the imaging lens according to claim 1 is an imaging lens for forming a subject image on a solid-state imaging device, a first lens having an aperture stop in order from the object side, a convex surface on the object side, and having a positive refractive power, It consists of two lenses and a third lens having negative refractive power, and satisfies the following conditional expression.
  • f1 focal length of the first lens
  • f2 focal length r2 of the entire imaging lens system: paraxial radius of curvature r3 of the first lens image side surface: paraxial radius of curvature r5 of the second lens object side surface: third lens
  • Paraxial curvature radius r6 of the object side surface Paraxial curvature radius d1 of the third lens image side surface
  • d1 Distance on the optical axis from the first lens object side surface to the image side surface
  • the present invention by using a three-lens configuration, it is possible to obtain a high-performance imaging lens that has superior aberration characteristics than the two-lens configuration. Further, by arranging the aperture stop closer to the object side than the first lens, it is possible to reduce the height while maintaining good telecentricity. Further, by making the object side of the first lens a convex surface and giving the first lens a positive refractive power, it is possible to realize a low profile and a wide angle. In addition, by giving negative power to the third lens, it is possible to correct curvature of field and astigmatism, and to increase the back focus.
  • conditional expression (1) When the value of conditional expression (1) is less than the upper limit, it is advantageous for lowering the width and widening the angle. On the other hand, when the value of conditional expression (1) exceeds the lower limit, spherical aberration and coma generated in the first lens are improved. Aberration can be suppressed and a bright F number can be realized.
  • the F number is preferably 3 or less.
  • the angle of view is preferably 65 ° or more.
  • conditional expression (3) Astigmatism can be corrected well, and the back focus can be lengthened.
  • conditional expression (4) When the value of conditional expression (4) falls below the upper limit, a reduction in height can be realized, and when the value of conditional expression (4) exceeds the lower limit, spherical aberration and coma generated in the first lens are suppressed and bright F The number can be secured.
  • the imaging lens according to claim 2 is characterized in that, in the invention according to claim 1, the first lens has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the imaging lens according to a third aspect is characterized in that, in the invention according to the first or second aspect, the second lens has a concave surface on the object side.
  • the curvature of field and astigmatism can be corrected, and a wide angle can be realized.
  • the imaging lens according to any one of the first to third aspects, wherein the second lens has a convex image side surface.
  • the image side surface of the second lens convex, it is possible to realize a wide angle without giving the first lens strong positive refractive power, and to suppress spherical aberration and coma generated in the first lens. Therefore, a bright F number can be realized.
  • the third lens has a concave image side surface.
  • the astigmatism can be corrected by making the image side surface of the third lens concave, the wide angle can be realized and the back focus can be lengthened.
  • the imaging lens according to a sixth aspect of the invention is characterized in that, in the invention according to any one of the first to fifth aspects, the third lens has a concave image side surface and a convex surface in the peripheral portion.
  • the peripheral part of the image side surface of the third lens convex, it is possible to realize a low profile while maintaining good telecentricity.
  • the image side surface is concave and has a convex surface in the peripheral portion” means that the cross section including the optical axis of the image side surface moves toward the image side as it moves away from the optical axis, and toward the object side at the inflection point. Say something.
  • the imaging lens according to any one of the first to sixth aspects, wherein the second lens satisfies the following conditional expression. 0.5 ⁇ f2 / f ⁇ 4.0 (5) However, f2: focal length of the second lens
  • conditional expression (5) When the value of conditional expression (5) is below the upper limit, it is advantageous for reduction in height and widening of the angle. On the other hand, when the value of conditional expression (5) exceeds the lower limit, the occurrence of field curvature and astigmatism is suppressed. Can do.
  • An imaging lens according to an eighth aspect of the invention is characterized in that, in the invention according to any one of the first to seventh aspects, the third lens satisfies the following conditional expression. ⁇ 10 ⁇ f3 / f ⁇ 0.7 (6) However, f3: focal length of the third lens
  • conditional expression (6) When the value of conditional expression (6) is less than the upper limit, it is advantageous for reduction in height, while when the value of conditional expression (6) exceeds the lower limit, astigmatism can be corrected well. It is more preferable that the following expression is satisfied. ⁇ 10 ⁇ f3 / f ⁇ 0.88 (6 ′)
  • An imaging lens according to a ninth aspect is characterized in that, in the invention according to any one of the first to eighth aspects, the imaging lens satisfies the following conditional expression. 0.1 ⁇
  • conditional expression (7) When the value of conditional expression (7) is lower than the upper limit, it is advantageous for low profile. On the other hand, when the value of conditional expression (7) exceeds the lower limit, spherical aberration and coma generated in the first lens are suppressed. Therefore, a bright F number can be secured.
  • the imaging lens according to a tenth aspect of the invention is characterized in that, in the invention according to any one of the first to ninth aspects, the imaging lens satisfies the following conditional expression. 0.3 ⁇ (d1 + d3 + d5) / TTL ⁇ 0.7 (8) However, d3: Distance on the optical axis from the second lens object side surface to the image side surface d5: Distance on the optical axis from the third lens object side surface to the image side surface TTL: From the first lens object side surface to the solid-state imaging device Distance on the optical axis to the light receiving surface
  • conditional expression (8) When the value of conditional expression (8) is below the upper limit, the height can be reduced and the back focus can be lengthened. On the other hand, when the value of conditional expression (8) exceeds the lower limit, the thickness of each lens does not become too thin, and the manufacturing stability of the imaging lens is improved.
  • An imaging lens according to an eleventh aspect is characterized in that, in the invention according to any one of the first to tenth aspects, the third lens satisfies the following conditional expression. 1.55 ⁇ n3 ⁇ 1.90 (9) n3: refractive index of the third lens
  • the lens thickness can be easily secured.
  • a material with a high refractive index for the third lens By using a material with a high refractive index for the third lens, the amount of surface sag can be reduced, the occurrence of lateral chromatic aberration can be suppressed, and the lens thickness can be easily secured.
  • One such material is glass.
  • the axial thickness is larger than 0.3 mm because it is difficult to break.
  • An imaging lens according to a twelfth aspect is characterized in that, in the invention according to any one of the first to eleventh aspects, the lens has substantially no refractive power. That is, even when a dummy lens having substantially no refractive power is added to the configuration of claim 1, it is within the scope of application of the present invention.
  • An image pickup apparatus uses the image pickup lens according to any one of the first to twelfth aspects.
  • an imaging lens which is suitable for a portable terminal and has an excellent aberration characteristic while having a low profile, wide angle and bright F number, and an imaging apparatus using the imaging lens.
  • FIG. 1 is a cross-sectional view of an imaging lens according to Example 1.
  • FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 1; 6 is a cross-sectional view of an imaging lens according to Example 2.
  • FIG. 1 is a cross-sectional view of an imaging lens according to Example 1.
  • FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 1; 6 is a cross-sectional view of an imaging lens according to Example 2.
  • FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 2; 6 is a cross-sectional view of an imaging lens according to Example 3.
  • FIG. FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 3; 6 is a cross-sectional view of an imaging lens according to Example 4.
  • FIG. FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 4; 6 is a cross-sectional view of an imaging lens according to Example 5.
  • FIG. FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 2; 6 is a cross-sectional view of an imaging lens according to Example 5.
  • FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 5; 6 is a cross-sectional view of an imaging lens according to Example 6.
  • FIG. FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 6; 10 is a cross-sectional view of an imaging lens according to Example 7.
  • FIG. FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 7; 10 is a cross-sectional view of an imaging lens according to Example 8.
  • FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 8; 10 is a cross-sectional view of an imaging lens according to Example 9.
  • FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 9; 10 is a cross-sectional view of an imaging lens according to Example 10.
  • FIG. FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 10; 12 is a cross-sectional view of an imaging lens according to Example 11.
  • FIG. FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 8; 10 is a cross-sectional view of an imaging lens according to Example 9.
  • FIG. FIG. 10 is an aberration diagram of sp
  • FIG. 12 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 11;
  • 14 is a cross-sectional view of an imaging lens according to Example 12.
  • FIG. FIG. 14 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 12;
  • 14 is a cross-sectional view of an imaging lens according to Example 13.
  • FIG. FIG. 14 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 13;
  • FIG. 1 is a perspective view of an imaging apparatus LU according to the present embodiment
  • FIG. 2 is a cross-sectional view of the configuration of FIG. 1 taken along line II-II and viewed in the direction of the arrow.
  • the imaging device LU captures a subject image on a CMOS image sensor IM as a solid-state imaging device having a photoelectric conversion unit IMa and a photoelectric conversion unit (light receiving surface) IMa of the image sensor IM.
  • the imaging lens LN to be connected and an external connection terminal (electrode) (not shown) that transmits and receives the electric signal are integrally formed.
  • the imaging lens LN includes an aperture stop Ape, a first lens L1 having a positive refractive power, a second lens L2, and a third lens L3 having a negative refractive power in order from the object side (upper side in FIG. 2). Consists of.
  • the first lens L1 and the second lens L2 are joined via a donut-plate-shaped first light-shielding member SH1, and the second lens L2 and the third lens L3 are donut-plate-shaped second light-shielding. It joins via member SH2. More specifically, a glass plate-shaped molded body formed with a plurality of lenses is prepared for each lens type, and the optical axes of the lenses are aligned with light shielding members SH1 and SH2 interposed therebetween.
  • each lens with the optical axis aligned is cut into a rectangular shape to form an imaging lens LN.
  • the outer side of the image side optical surface of the first lens L1 and the outer side of the object side optical surface of the second lens L2 are slightly spaced apart, the flange portion of the first lens L1 and the second lens L2 is easily in contact with the flange portion.
  • the outer side of the image side optical surface of the second lens L2 and the outer side of the object side optical surface of the third lens L3 are slightly spaced apart, the flange portion of the second lens L2 and the third lens L3 are separated. It is easy to contact with the flange part.
  • the cut imaging lens LN is fitted to the inner periphery of a lens barrel HLD whose inner peripheral section is rectangular and is fixed via an adhesive.
  • the lens barrel HLD has an outer threaded portion HLLa on the outer periphery, and by screwing this to the inner threaded portion BXa of the cylindrical housing BX, the lens barrel HLD can be adjusted in the optical axis direction. Is attached.
  • An IR cut filter IRCF is attached to a flange portion BXb that protrudes inward from the housing BX so as to face the lower end of the lens barrel HLD. Further, the lower end of the housing BX is in contact with the substrate ST holding the image sensor IM.
  • the imaging lens LN described in the present invention is not limited to the above configuration.
  • the lenses L1 to L3 made of glass or plastic may be individually molded and accommodated in the lens barrel HLD without being joined.
  • a fitting portion may be provided on the lens outer peripheral portion or the lens barrel HLD.
  • the imaging lens LN of the present embodiment satisfies the following conditional expression. 0.9 ⁇ f1 / f ⁇ 1.5 (1) -3 ⁇ r2 / r3 ⁇ -0.2 (2) -0.1 ⁇ (r5 + r6) / (r5-r6) ⁇ 3.0 (3) 0.18 ⁇ d1 / f ⁇ 0.5 (4)
  • f1 Focal length of the first lens L1
  • f Focal length r2 of the entire imaging lens system: Paraxial radius of curvature r3 of the first lens L1 image side surface
  • Paraxial radius of curvature r5 of the second lens L2 object side surface Third lens L3 Paraxial curvature radius r6 of the object side surface: Paraxial curvature radius d1 of the third lens L3 image side surface: Distance on the optical axis from the first lens L1 object side surface to the image side surface
  • a photoelectric conversion unit IMa as a light receiving unit in which pixels (photoelectric conversion elements) are two-dimensionally arranged is formed in the center of a plane on the light receiving side, and signal processing (not shown) is performed.
  • a signal processing circuit includes a drive circuit unit that sequentially drives each pixel to obtain a signal charge, an A / D conversion unit that converts each signal charge into a digital signal, and a signal that forms an image signal output using the digital signal. It consists of a processing unit and the like.
  • a number of pads are arranged near the outer edge of the light receiving side plane of the image sensor IM, and are connected to the image sensor IM via wires (not shown).
  • the image sensor IM converts a signal charge from the photoelectric conversion unit IMa into an image signal such as a digital YUV signal and outputs the image signal to a predetermined circuit via a wire (not shown).
  • Y is a luminance signal
  • the solid-state imaging device is not limited to the CMOS image sensor, and other devices such as a CCD may be used.
  • the image sensor IM is connected to an external circuit (for example, a control circuit included in a host device of a portable terminal mounted with an imaging device) via an external connection terminal, and a voltage or a clock for driving the image sensor IM from the external circuit. It is possible to receive a signal and to output a digital YUV signal to an external circuit.
  • an external circuit for example, a control circuit included in a host device of a portable terminal mounted with an imaging device
  • FIGS. 3 is a view of the folded mobile phone as viewed from the inside
  • FIG. 4 is a view of the folded mobile phone as viewed from the outside.
  • an upper casing 71 as a case having display screens D1 and D2 and a lower casing 72 having operation buttons B are connected via a hinge 73.
  • the main imaging device MC for photographing a landscape or the like is provided on the surface side of the upper housing 71, and the imaging device LU including the above-described wide-angle imaging lens LN is the upper housing 71. And provided on the display screen D1.
  • the imaging lens LN can image the upper body of the user himself / herself holding the mobile phone T with his / her hand in the state of facing the imaging device LU as shown in FIG.
  • the imaging lens LN of the present embodiment contributes to the compactness of the imaging device LU, and is suitable for such photographing because it has a wide angle and a bright F number.
  • a so-called videophone can be realized by making a normal call.
  • the mobile phone T is not limited to a folding type.
  • the surface described with “*” after each surface number is a surface having an aspheric shape, and the shape of the aspheric surface has the vertex of the surface as the origin and the X axis in the optical axis direction.
  • the height in the direction perpendicular to the optical axis is represented by the following “Equation 1”.
  • a power of 10 for example, 2.5 ⁇ 10 ⁇ 02
  • E or e for example, 2.5e ⁇ 002
  • the surface number of the lens data was given in order with the object side of the first lens as one surface.
  • the unit of the numerical value showing the length as described in an Example shall be mm.
  • the paraxial radius of curvature in the actual lens measurement scene, in the vicinity of the center of the lens (specifically, the central region within 10% of the lens outer diameter).
  • the approximate radius of curvature when the measured shape of the shape is fitted by the method of least squares can be regarded as the paraxial radius of curvature.
  • a radius of curvature that takes into account the secondary aspherical coefficient in the reference curvature radius of the aspherical definition formula can be regarded as a paraxial curvature radius.
  • Example 1 shows lens data in Example 1.
  • 5 is a sectional view of the lens of Example 1.
  • the imaging lens of Example 1 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2 having a positive refractive power, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 6 is an aberration diagram of Example 1 (spherical aberration (a), astigmatism (b), distortion (c)).
  • the solid line represents the spherical aberration amount with respect to the d line and the dotted line, respectively
  • the solid line represents the sagittal surface and the dotted line represents the meridional surface (hereinafter the same).
  • FIG. 7 is a sectional view of the lens of Example 2.
  • the imaging lens of Example 2 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 8 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism (b), distortion (c)).
  • FIG. 9 is a sectional view of the lens of Example 3.
  • the imaging lens of Example 3 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 10 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism (b), distortion (c)).
  • Example 4 shows lens data in Example 4.
  • FIG. 11 is a sectional view of the lens of Example 4.
  • the imaging lens of Example 4 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 12 is an aberration diagram of Example 4 (spherical aberration (a), astigmatism (b), distortion (c)).
  • FIG. 13 is a sectional view of the lens of Example 5.
  • the imaging lens of Example 5 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 14 is an aberration diagram of Example 5 (spherical aberration (a), astigmatism (b), distortion (c)).
  • FIG. 15 is a sectional view of the lens of Example 6.
  • the imaging lens of Example 6 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 16 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism (b), distortion (c)).
  • Example 7 shows lens data in Example 7.
  • FIG. 17 is a sectional view of the lens of Example 7.
  • the imaging lens of Example 7 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 18 is an aberration diagram of Example 7 (spherical aberration (a), astigmatism (b), distortion (c)).
  • Example 8 shows lens data in Example 8.
  • FIG. 19 is a sectional view of the lens of Example 8.
  • the imaging lens of Example 8 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 20 is an aberration diagram of Example 8 (spherical aberration (a), astigmatism (b), distortion (c)).
  • Example 9 shows lens data in Example 9.
  • FIG. 21 is a sectional view of the lens of Example 9.
  • the imaging lens of Example 9 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 22 is an aberration diagram of Example 9 (spherical aberration (a), astigmatism (b), distortion (c)).
  • FIG. 23 is a sectional view of the lens of Example 10.
  • the imaging lens of Example 10 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 24 is an aberration diagram of Example 10 (spherical aberration (a), astigmatism (b), distortion (c)).
  • FIG. 25 is a sectional view of the lens of Example 11.
  • the imaging lens of Example 11 includes an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 26 is an aberration diagram of Example 11 (spherical aberration (a), astigmatism (b), distortion (c)).
  • Example 12 Lens data in Example 12 are shown in Table 12.
  • FIG. 27 is a sectional view of the lens of Example 12.
  • the imaging lens of Example 12 includes an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 28 is an aberration diagram of Example 12 (spherical aberration (a), astigmatism (b), distortion (c)).
  • FIG. 29 is a sectional view of the lens of Example 13.
  • the imaging lens of Example 13 has an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power.
  • the first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  • the second lens L2 has a concave surface on the object side and a convex surface on the image side.
  • the third lens L3 has a concave image side surface and a convex surface at the periphery.
  • IRCF is an IR cut filter
  • IM is an imaging surface of the solid-state imaging device.
  • FIG. 30 is an aberration diagram of Example 13 (spherical aberration (a), astigmatism (b), distortion (c)).
  • Table 14 summarizes the values of the examples corresponding to each conditional expression.
  • the present invention is not limited to the embodiments described in the specification, and other embodiments and modifications are included in the present field from the embodiments and technical ideas described in the present specification. It is clear to the contractor. For example, even when a dummy lens having substantially no refractive power is further provided, it is within the scope of application of the present invention.

Abstract

Provided is an imaging the lens and an imaging device in which the same is used that are suitable for use in a portable terminal and have excellent aberration characteristics while providing a wide angle and bright F number. The imaging lens is formed from, in order from the subject side, an opening aperture, a first lens and second lens provided with a convex surface on the subject side and having positive refractive power, and a third lens having negative refractive power and satisfies the following conditional equations. 0.9 < f1/f < 1.5 (1) -3 < r2/r3 < -0.2 (2) -0.1 < (r5 + r6)/(r5 - r6) < 3.0 (3) 0.18 < d1/f < 0.5 (4) Wherein, f1: focal distance for first lens f: focal distance for imaging lens system r2: paraxial radius of curvature for first lens image side surface r3: paraxial radius of curvature for second lens subject side surface r5: paraxial radius of curvature for third lens subject side surface r6: paraxial radius of curvature for third lens image side surface d1: distance on optical axis from first lens subject side surface to image side surface

Description

撮像レンズ及び撮像装置Imaging lens and imaging apparatus
　本発明は、ＣＣＤ(Charge Coupled Device)型イメージセンサやＣＭＯＳ(Complementary Metal-Oxide Semiconductor)型イメージセンサ等の固体撮像素子を用いた撮像装置に好適な撮像レンズ及び撮像レンズを用いた撮像装置に関するものである。 The present invention relates to an imaging lens suitable for an imaging apparatus using a solid-state imaging device such as a CCD (Charge-Coupled Device) type image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) type image sensor, and an imaging apparatus using the imaging lens. It is.
　小型で薄型の撮像装置が、携帯電話機やＰＤＡ(Personal Digital Assistant)等のコンパクトで、薄型の電子機器である携帯端末に搭載されるようになり、これにより遠隔地へ音声情報だけでなく画像情報も相互に伝送することが可能となっている。 Small and thin imaging devices are now mounted on portable terminals, which are compact and thin electronic devices such as mobile phones and PDAs (Personal Digital Assistants), which enables not only audio information but also image information to remote locations. Can also be transmitted to each other.
　これらの撮像装置に使用される撮像素子としては、ＣＣＤ(Charge Coupled Device)型イメージセンサおよびＣＭＯＳ(Complementary Metal-Oxide Semiconductor)型イメージセンサ等の固体撮像素子が使用されている。近年では、撮像素子の画素ピッチの微小化が進み、高画素化により、高解像、高性能化が図られてきている。一方で、画素を維持しながら、撮像素子の小型化を図ることもある。加えて、最近では携帯端末を使用するユーザーの画像を撮影して相手方に伝送し、会話する相手の画像を相互に表示する、いわゆるテレビ電話機能も有する携帯端末も増えつつある。このため、メインカメラの他に、ユーザー自身を撮影するサブカメラを備えている携帯端末も多い。 As image sensors used in these image pickup apparatuses, solid-state image sensors such as CCD (Charge Coupled Device) type image sensors and CMOS (Complementary Metal-Oxide Semiconductor) type image sensors are used. In recent years, the pixel pitch of the image sensor has been miniaturized, and higher resolution and higher performance have been achieved by increasing the number of pixels. On the other hand, the image sensor may be downsized while maintaining the pixels. In addition, recently, an increasing number of mobile terminals have a so-called videophone function that captures an image of a user who uses a mobile terminal, transmits the image to the other party, and displays the images of the other party having a conversation with each other. For this reason, in addition to the main camera, there are many portable terminals provided with a sub camera for photographing the user himself.
　また、レンズモジュールを大量生産する手法と共に、レンズモジュールを低コストかつ大量に基板に実装する方法として、近年では予め半田がポッティングされた基板に対しＩＣ(Integrated Circuit)チップや、その他の電子部品と共に、レンズモジュールを載置したままリフロー処理（加熱処理）し、半田を溶融させることにより電子部品とレンズモジュールとを基板に同時実装するという手法が提案されており、リフロー処理に耐え得る耐熱性に優れた撮像レンズも求められている。このような撮像レンズとして、レンズブロックを３枚構成とした撮像レンズが特許文献１，２により提案されている。 In addition to mass production of lens modules, as a method of mounting lens modules on a board at low cost and in large quantities, in recent years, IC (Integrated Circuit) chips and other electronic components are mounted on boards that have been soldered in advance. A method has been proposed in which an electronic component and a lens module are simultaneously mounted on a substrate by reflow treatment (heating treatment) while the lens module is placed and melting the solder, and the heat resistance can withstand the reflow treatment. There is also a need for excellent imaging lenses. As such an imaging lens, Patent Documents 1 and 2 propose imaging lenses having three lens blocks.
特開２００６－８４７２０号広報Japanese Laid-Open Patent Publication No. 2006-84720 米国特許出願第２０１１／２７９９１０号明細書US Patent Application No. 2011/279910
　ところで上記のように、携帯端末等にテレビ電話機能を持たせた時に使用される撮像レンズには、携帯端末等を使用する至近距離のユーザーを撮影するために必要な広角性能のみならず、例えばサブカメラ用の撮像装置に用いる固体撮像素子の画素ピッチが小さくなってきていることに鑑みて、より明るいＦナンバーの確保も求められているという実情がある。ところが、特許文献１に記載のレンズは、かかる用途に必要な広角性能を達成していないばかりかＦナンバーも暗いという問題がある。これに対し、特許文献２に記載のレンズは広角性能と、明るいＦナンバーは確保しているものの、諸収差の補正が不十分で画面周辺部まで良好な画質を得ることができないという問題がある。 By the way, as described above, the imaging lens used when the mobile terminal or the like has a videophone function has not only the wide-angle performance necessary for photographing a user at a short distance using the mobile terminal or the like, for example, In view of the fact that the pixel pitch of the solid-state imaging device used in the imaging device for the sub camera is becoming smaller, there is a situation that a brighter F number is required to be secured. However, the lens described in Patent Document 1 has a problem that the F-number is dark as well as not achieving the wide-angle performance necessary for such applications. On the other hand, although the lens described in Patent Document 2 has a wide-angle performance and a bright F number, there is a problem that correction of various aberrations is insufficient and a good image quality cannot be obtained up to the periphery of the screen. .
　本発明は、このような問題を鑑みてなされたものであり、携帯端末用として好適であり、低背、広角かつ明るいＦナンバーを備えながらも収差特性に優れた撮像レンズ及びこれを用いた撮像装置を提供することを目的とする。 The present invention has been made in view of such a problem, and is suitable for a portable terminal. An imaging lens having a low profile, a wide angle, and a bright F number, and having excellent aberration characteristics, and an imaging using the imaging lens. An object is to provide an apparatus.
　請求項１に記載の撮像レンズは、固体撮像素子に対して被写体像を結像させる撮像レンズにおいて、物体側から順に開口絞り、物体側に凸面を備え正の屈折力を有する第１レンズ、第２レンズ、負の屈折力を有する第３レンズから成り、以下の条件式を満足することを特徴とする。
　０．９＜ｆ１／ｆ＜１．５　　　　（１）
　－３＜ｒ２／ｒ３＜－０．２　　　（２）
　－０．１＜（ｒ５＋ｒ６）／（ｒ５－ｒ６）＜３．０　　　（３）
　０．１８＜ｄ１／ｆ＜０．５　　　（４）
但し、
ｆ１　：前記第１レンズの焦点距離
ｆ　　：撮像レンズ全系の焦点距離
ｒ２　：前記第１レンズ像側面の近軸曲率半径
ｒ３　：前記第２レンズ物体側面の近軸曲率半径
ｒ５　：前記第３レンズ物体側面の近軸曲率半径
ｒ６　：前記第３レンズ像側面の近軸曲率半径
ｄ１　：前記第１レンズ物体側面から像側面までの光軸上の距離 The imaging lens according to claim 1 is an imaging lens for forming a subject image on a solid-state imaging device, a first lens having an aperture stop in order from the object side, a convex surface on the object side, and having a positive refractive power, It consists of two lenses and a third lens having negative refractive power, and satisfies the following conditional expression.
0.9 <f1 / f <1.5 (1)
-3 <r2 / r3 <-0.2 (2)
-0.1 <(r5 + r6) / (r5-r6) <3.0 (3)
0.18 <d1 / f <0.5 (4)
However,
f1: focal length of the first lens f: focal length r2 of the entire imaging lens system: paraxial radius of curvature r3 of the first lens image side surface: paraxial radius of curvature r5 of the second lens object side surface: third lens Paraxial curvature radius r6 of the object side surface: Paraxial curvature radius d1 of the third lens image side surface d1: Distance on the optical axis from the first lens object side surface to the image side surface
　本発明によれば、３枚のレンズ構成とすることで、２枚のレンズ構成よりも収差特性に優れ高性能の撮像レンズとすることができる。又、前記開口絞りを前記第１レンズよりも物体側に配置することで、良好なテレセントリック性を保ちつつ低背化することができる。更に、前記第１レンズの物体側を凸面とし、前記第１レンズに正の屈折力を持たせることで、低背化と広角化を実現することができる。加えて、前記第３レンズに負の屈折力を持たせることで、像面湾曲、非点収差を補正できるとともにバックフォーカスを長くすることができる。 According to the present invention, by using a three-lens configuration, it is possible to obtain a high-performance imaging lens that has superior aberration characteristics than the two-lens configuration. Further, by arranging the aperture stop closer to the object side than the first lens, it is possible to reduce the height while maintaining good telecentricity. Further, by making the object side of the first lens a convex surface and giving the first lens a positive refractive power, it is possible to realize a low profile and a wide angle. In addition, by giving negative power to the third lens, it is possible to correct curvature of field and astigmatism, and to increase the back focus.
　条件式（１）の値が上限を下回ることで低背化、広角化に有利となり、一方、条件式（１）の値が下限を上回ることで、前記第１レンズで発生する球面収差、コマ収差を抑え明るいＦナンバーを実現することができる。Ｆナンバーは３以下であることが好ましい。 When the value of conditional expression (1) is less than the upper limit, it is advantageous for lowering the width and widening the angle. On the other hand, when the value of conditional expression (1) exceeds the lower limit, spherical aberration and coma generated in the first lens are improved. Aberration can be suppressed and a bright F number can be realized. The F number is preferably 3 or less.
　条件式（２）を満足することで、前記第１レンズ像側面で発生するコマ収差を前記第２レンズ物体側面で良好に補正することができ、広角化が実現できる。画角は６５゜以上あると好ましい。 By satisfying the conditional expression (2), coma generated on the side surface of the first lens image can be corrected well on the side surface of the second lens object, and a wide angle can be realized. The angle of view is preferably 65 ° or more.
　条件式（３）を満足することで、非点収差を良好に補正できる他、バックフォーカスを長くすることができる。 By satisfying conditional expression (3), astigmatism can be corrected well, and the back focus can be lengthened.
　条件式（４）の値が上限を下回ることで低背化を実現でき、条件式（４）の値が下限を上回ることで、前記第１レンズで発生する球面収差、コマ収差を抑え明るいＦナンバーの確保を実現できる。 When the value of conditional expression (4) falls below the upper limit, a reduction in height can be realized, and when the value of conditional expression (4) exceeds the lower limit, spherical aberration and coma generated in the first lens are suppressed and bright F The number can be secured.
　請求項２に記載の撮像レンズは、請求項１に記載の発明において、前記第１レンズは物体側が凸面、像側が凹面の物凸メニスカス形状であることを特徴とする。 The imaging lens according to claim 2 is characterized in that, in the invention according to claim 1, the first lens has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
　前記第１レンズの像側面を凹面とすることで像面湾曲を補正できる他、前記第１レンズで発生する球面収差、コマ収差を補正することができ、広角化と明るいＦナンバーが実現できる。 In addition to correcting the curvature of field by making the image side surface of the first lens concave, it is possible to correct spherical aberration and coma aberration generated in the first lens, thereby realizing a wide angle and a bright F number.
　請求項３に記載の撮像レンズは、請求項１又は２に記載の発明において、前記第２レンズは物体側が凹面であることを特徴とする。 The imaging lens according to a third aspect is characterized in that, in the invention according to the first or second aspect, the second lens has a concave surface on the object side.
　前記第２レンズの物体側面を凹面とすることで像面湾曲と非点収差を補正でき、広角化を実現できる。 By making the object side surface of the second lens concave, the curvature of field and astigmatism can be corrected, and a wide angle can be realized.
　請求項４に記載の撮像レンズは、請求項１～３のいずれかに記載の発明において、前記第２レンズは像側面が凸面であることを特徴とする。 According to a fourth aspect of the present invention, there is provided the imaging lens according to any one of the first to third aspects, wherein the second lens has a convex image side surface.
　前記第２レンズの像側面を凸面とすることで、前記第１レンズに強い正の屈折力を持たせなくても広角化を実現でき、前記第１レンズで発生する球面収差、コマ収差を抑えることができるため明るいＦナンバーを実現できる。 By making the image side surface of the second lens convex, it is possible to realize a wide angle without giving the first lens strong positive refractive power, and to suppress spherical aberration and coma generated in the first lens. Therefore, a bright F number can be realized.
　請求項５に記載の撮像レンズは、請求項１～４のいずれかに記載の発明において、前記第３レンズは像側面が凹面であることを特徴とする。 According to a fifth aspect of the present invention, in the imaging lens according to any one of the first to fourth aspects, the third lens has a concave image side surface.
　前記第３レンズの像側面を凹面とすることで非点収差を補正できるため、広角化を実現できる他、バックフォーカスを長くすることができる。 Since the astigmatism can be corrected by making the image side surface of the third lens concave, the wide angle can be realized and the back focus can be lengthened.
　請求項６に記載の撮像レンズは、請求項１～５のいずれかに記載の発明において、前記第３レンズは像側面が凹面でかつ周辺部に凸面を有することを特徴とする。 The imaging lens according to a sixth aspect of the invention is characterized in that, in the invention according to any one of the first to fifth aspects, the third lens has a concave image side surface and a convex surface in the peripheral portion.
　前記第３レンズの像側面の周辺部を凸面とすることで、テレセントリック性を良好に保ちながら低背化が実現できる。尚、「像側面が凹面でかつ周辺部に凸面を有する」とは、像側面の光軸を含む断面において光軸から離れるにつれて像側に向かい、変曲点を境に物体側に向かう形状であることをいう。 By making the peripheral part of the image side surface of the third lens convex, it is possible to realize a low profile while maintaining good telecentricity. Note that “the image side surface is concave and has a convex surface in the peripheral portion” means that the cross section including the optical axis of the image side surface moves toward the image side as it moves away from the optical axis, and toward the object side at the inflection point. Say something.
　請求項７に記載の撮像レンズは、請求項１～６のいずれかに記載の発明において、前記第２レンズは、以下の条件式を満足することを特徴とする。
　０．５＜ｆ２／ｆ＜４．０　　　（５）
但し、
ｆ２　：前記第２レンズの焦点距離 According to a seventh aspect of the present invention, there is provided the imaging lens according to any one of the first to sixth aspects, wherein the second lens satisfies the following conditional expression.
0.5 <f2 / f <4.0 (5)
However,
f2: focal length of the second lens
　条件式（５）の値が上限を下回ることで低背化、広角化に有利となり、一方、条件式（５）の値が下限を上回ることで像面湾曲、非点収差の発生を抑えることができる。 When the value of conditional expression (5) is below the upper limit, it is advantageous for reduction in height and widening of the angle. On the other hand, when the value of conditional expression (5) exceeds the lower limit, the occurrence of field curvature and astigmatism is suppressed. Can do.
　請求項８に記載の撮像レンズは、請求項１～７のいずれかに記載の発明において、前記第３レンズは、以下の条件式を満足することを特徴とする。
　－１０＜ｆ３／ｆ＜－０．７　　　（６）
但し、
ｆ３：前記第３レンズの焦点距離 An imaging lens according to an eighth aspect of the invention is characterized in that, in the invention according to any one of the first to seventh aspects, the third lens satisfies the following conditional expression.
−10 <f3 / f <−0.7 (6)
However,
f3: focal length of the third lens
　条件式（６）の値が上限を下回ることで低背化に有利となり、一方、条件式（６）の値が下限を上回ることで非点収差を良好に補正できる。尚、以下の式を満たすと、更に好ましい。
　－１０＜ｆ３／ｆ＜－０．８８　　　（６’） When the value of conditional expression (6) is less than the upper limit, it is advantageous for reduction in height, while when the value of conditional expression (6) exceeds the lower limit, astigmatism can be corrected well. It is more preferable that the following expression is satisfied.
−10 <f3 / f <−0.88 (6 ′)
　請求項９に記載の撮像レンズは、請求項１～８のいずれかに記載の発明において、前記撮像レンズは、以下の条件式を満足することを特徴とする。
　０．１＜｜ｆ１／ｆ２｜＜２．０　　　（７）
但し、
ｆ２　：前記第２レンズの焦点距離 An imaging lens according to a ninth aspect is characterized in that, in the invention according to any one of the first to eighth aspects, the imaging lens satisfies the following conditional expression.
0.1 <| f1 / f2 | <2.0 (7)
However,
f2: focal length of the second lens
　条件式（７）の値が上限を下回ることで低背化に有利となり、一方、条件式（７）の値が下限を上回ることで、第１レンズで発生する球面収差、コマ収差を抑えることができるため明るいＦナンバーを確保することができる。 When the value of conditional expression (7) is lower than the upper limit, it is advantageous for low profile. On the other hand, when the value of conditional expression (7) exceeds the lower limit, spherical aberration and coma generated in the first lens are suppressed. Therefore, a bright F number can be secured.
　請求項１０に記載の撮像レンズは、請求項１～９のいずれかに記載の発明において、前記撮像レンズは、以下の条件式を満足することを特徴とする。
　０．３＜（ｄ１＋ｄ３＋ｄ５）／ＴＴＬ＜０．７　　　（８）
但し、
ｄ３　：前記第２レンズ物体側面から像側面までの光軸上の距離
ｄ５　：前記第３レンズ物体側面から像側面までの光軸上の距離
ＴＴＬ：前記第１レンズ物体側面から前記固体撮像素子の受光面までの光軸上の距離 The imaging lens according to a tenth aspect of the invention is characterized in that, in the invention according to any one of the first to ninth aspects, the imaging lens satisfies the following conditional expression.
0.3 <(d1 + d3 + d5) / TTL <0.7 (8)
However,
d3: Distance on the optical axis from the second lens object side surface to the image side surface d5: Distance on the optical axis from the third lens object side surface to the image side surface TTL: From the first lens object side surface to the solid-state imaging device Distance on the optical axis to the light receiving surface
　条件式（８）の値が上限を下回ることで低背化を実現できバックフォーカスを長くすることができる。一方、条件式（８）の値が下限を上回ることで、各レンズの厚みが薄くなりすぎず撮像レンズの製造安定性が向上する。 こ と When the value of conditional expression (8) is below the upper limit, the height can be reduced and the back focus can be lengthened. On the other hand, when the value of conditional expression (8) exceeds the lower limit, the thickness of each lens does not become too thin, and the manufacturing stability of the imaging lens is improved.
　請求項１１に記載の撮像レンズは、請求項１～１０のいずれかに記載の発明において、前記第３レンズは、以下の条件式を満足することを特徴とする。
　１．５５＜ｎ３＜１．９０　　　（９）
ｎ３　：前記第３レンズの屈折率 An imaging lens according to an eleventh aspect is characterized in that, in the invention according to any one of the first to tenth aspects, the third lens satisfies the following conditional expression.
1.55 <n3 <1.90 (9)
n3: refractive index of the third lens
　前記第３レンズに高い屈折率の材料を用いることで面のサグ量を小さくすることができ倍率色収差の発生を抑えることができる他、レンズ厚みを確保しやすくなる。このような素材としては、ガラスがある。レンズをガラス製とする場合、軸上厚が０．３ｍｍより大きいと割れにくいので好ましい。 By using a material with a high refractive index for the third lens, the amount of surface sag can be reduced, the occurrence of lateral chromatic aberration can be suppressed, and the lens thickness can be easily secured. One such material is glass. When the lens is made of glass, it is preferable that the axial thickness is larger than 0.3 mm because it is difficult to break.
　請求項１２に記載の撮像レンズは、請求項１～１１のいずれかに記載の発明において、実質的に屈折力を有しないレンズを有することを特徴とする。つまり、請求項１の構成に、実質的に屈折力を持たないダミーレンズを付与した場合でも本発明の適用範囲内である。 An imaging lens according to a twelfth aspect is characterized in that, in the invention according to any one of the first to eleventh aspects, the lens has substantially no refractive power. That is, even when a dummy lens having substantially no refractive power is added to the configuration of claim 1, it is within the scope of application of the present invention.
　請求項１３に記載の撮像装置は、請求項１～１２のいずれかに記載の撮像レンズを用いることを特徴とする。 An image pickup apparatus according to a thirteenth aspect uses the image pickup lens according to any one of the first to twelfth aspects.
　本発明によれば、携帯端末用として好適であり、低背、広角かつ明るいＦナンバーを備えながらも収差特性に優れた撮像レンズ及びこれを用いた撮像装置を提供することができる。 According to the present invention, it is possible to provide an imaging lens which is suitable for a portable terminal and has an excellent aberration characteristic while having a low profile, wide angle and bright F number, and an imaging apparatus using the imaging lens.
本実施の形態にかかる撮像装置ＬＵの斜視図である。It is a perspective view of imaging device LU concerning this embodiment. 図１の構成を矢印II-II線で切断して矢印方向に見た断面図である。It is sectional drawing which cut | disconnected the structure of FIG. 1 by the arrow II-II line | wire, and looked at the arrow direction. 携帯電話機Ｔの表面を示す図である。2 is a diagram showing a surface of a mobile phone T. FIG. 携帯電話機Ｔの裏面を示す図である。4 is a diagram showing a back surface of a mobile phone T. FIG. 実施例１にかかる撮像レンズの断面図である。1 is a cross-sectional view of an imaging lens according to Example 1. FIG. 実施例１にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 1; 実施例２にかかる撮像レンズの断面図である。6 is a cross-sectional view of an imaging lens according to Example 2. FIG. 実施例２にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 2; 実施例３にかかる撮像レンズの断面図である。6 is a cross-sectional view of an imaging lens according to Example 3. FIG. 実施例３にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 3; 実施例４にかかる撮像レンズの断面図である。6 is a cross-sectional view of an imaging lens according to Example 4. FIG. 実施例４にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 6 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 4; 実施例５にかかる撮像レンズの断面図である。6 is a cross-sectional view of an imaging lens according to Example 5. FIG. 実施例５にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 5; 実施例６にかかる撮像レンズの断面図である。6 is a cross-sectional view of an imaging lens according to Example 6. FIG. 実施例６にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 6; 実施例７にかかる撮像レンズの断面図である。10 is a cross-sectional view of an imaging lens according to Example 7. FIG. 実施例７にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 7; 実施例８にかかる撮像レンズの断面図である。10 is a cross-sectional view of an imaging lens according to Example 8. FIG. 実施例８にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 8; 実施例９にかかる撮像レンズの断面図である。10 is a cross-sectional view of an imaging lens according to Example 9. FIG. 実施例９にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 9; 実施例１０にかかる撮像レンズの断面図である。10 is a cross-sectional view of an imaging lens according to Example 10. FIG. 実施例１０にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 10 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 10; 実施例１１にかかる撮像レンズの断面図である。12 is a cross-sectional view of an imaging lens according to Example 11. FIG. 実施例１１にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 12 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 11; 実施例１２にかかる撮像レンズの断面図である。14 is a cross-sectional view of an imaging lens according to Example 12. FIG. 実施例１２にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 14 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion aberration (c) of the imaging lens according to Example 12; 実施例１３にかかる撮像レンズの断面図である。14 is a cross-sectional view of an imaging lens according to Example 13. FIG. 実施例１３にかかる撮像レンズの球面収差（ａ）、非点収差（ｂ）、及び歪曲収差（ｃ）の収差図である。FIG. 14 is an aberration diagram of spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 13;
　以下、本発明の実施の形態を図面に基づいて説明する。図１は、本実施の形態にかかる撮像装置ＬＵの斜視図であり、図２は、図１の構成を矢印II-II線で切断して矢印方向に見た断面図である。図１，２に示すように、撮像装置ＬＵは、光電変換部ＩＭａを有する固体撮像素子としてのＣＭＯＳ型イメージセンサＩＭと、このイメージセンサＩＭの光電変換部（受光面）ＩＭａに被写体像を撮像させる撮像レンズＬＮと、その電気信号の送受を行う不図示の外部接続用端子（電極）とを備え、これらが一体的に形成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an imaging apparatus LU according to the present embodiment, and FIG. 2 is a cross-sectional view of the configuration of FIG. 1 taken along line II-II and viewed in the direction of the arrow. As illustrated in FIGS. 1 and 2, the imaging device LU captures a subject image on a CMOS image sensor IM as a solid-state imaging device having a photoelectric conversion unit IMa and a photoelectric conversion unit (light receiving surface) IMa of the image sensor IM. The imaging lens LN to be connected and an external connection terminal (electrode) (not shown) that transmits and receives the electric signal are integrally formed.
　撮像レンズＬＮは、物体側（図２で上方）から順に、開口絞りＡｐｅと、正の屈折力を有する第１レンズＬ１と、第２レンズＬ２と、負の屈折力を有する第３レンズＬ３とからなる。第１レンズＬ１と第２レンズＬ２とは、ドーナッツ板状の第１の遮光部材ＳＨ１を介して接合されており、第２レンズＬ２と第３レンズＬ３とは、ドーナッツ板状の第２の遮光部材ＳＨ２を介して接合されている。より具体的には、ガラス製の板状成形体に複数のレンズを成形したものを、レンズの種類毎に３枚用意し、間に遮光部材ＳＨ１，ＳＨ２を介在させてレンズの光軸を合わせながら接合した後に、光軸を合わせたレンズ毎に周囲を矩形状に切断して撮像レンズＬＮとしている。ここで、第１レンズＬ１の像側光学面の外側と、第２レンズＬ２の物体側光学面の外側とが僅かなスキマを隔てているので、第１レンズＬ１のフランジ部と、第２レンズＬ２にフランジ部とが当接しやすくなっている。又、第２レンズＬ２の像側光学面の外側と、第３レンズＬ３の物体側光学面の外側とが僅かなスキマを隔てているので、第２レンズＬ２のフランジ部と、第３レンズＬ３のフランジ部とが当接しやすくなっている。 The imaging lens LN includes an aperture stop Ape, a first lens L1 having a positive refractive power, a second lens L2, and a third lens L3 having a negative refractive power in order from the object side (upper side in FIG. 2). Consists of. The first lens L1 and the second lens L2 are joined via a donut-plate-shaped first light-shielding member SH1, and the second lens L2 and the third lens L3 are donut-plate-shaped second light-shielding. It joins via member SH2. More specifically, a glass plate-shaped molded body formed with a plurality of lenses is prepared for each lens type, and the optical axes of the lenses are aligned with light shielding members SH1 and SH2 interposed therebetween. After being joined, the periphery of each lens with the optical axis aligned is cut into a rectangular shape to form an imaging lens LN. Here, since the outer side of the image side optical surface of the first lens L1 and the outer side of the object side optical surface of the second lens L2 are slightly spaced apart, the flange portion of the first lens L1 and the second lens L2 is easily in contact with the flange portion. Further, since the outer side of the image side optical surface of the second lens L2 and the outer side of the object side optical surface of the third lens L3 are slightly spaced apart, the flange portion of the second lens L2 and the third lens L3 are separated. It is easy to contact with the flange part.
　切断された撮像レンズＬＮは、内周断面が矩形状の鏡筒ＨＬＤの内周に嵌合し接着剤を介して固定されている。鏡筒ＨＬＤは外周に外ネジ部ＨＬＤａを有しており、これを円筒状の筐体ＢＸの内ネジ部ＢＸａに螺合させることで、鏡筒ＨＬＤは光軸方向に調整自在に筐体ＢＸに取り付けられている。鏡筒ＨＬＤの下端に対向して、筐体ＢＸから内周側に突出したフランジ部ＢＸｂに、ＩＲカットフィルタＩＲＣＦが取り付けられている。又、筐体ＢＸの下端は、イメージセンサＩＭを保持する基板ＳＴに当接している。 The cut imaging lens LN is fitted to the inner periphery of a lens barrel HLD whose inner peripheral section is rectangular and is fixed via an adhesive. The lens barrel HLD has an outer threaded portion HLLa on the outer periphery, and by screwing this to the inner threaded portion BXa of the cylindrical housing BX, the lens barrel HLD can be adjusted in the optical axis direction. Is attached. An IR cut filter IRCF is attached to a flange portion BXb that protrudes inward from the housing BX so as to face the lower end of the lens barrel HLD. Further, the lower end of the housing BX is in contact with the substrate ST holding the image sensor IM.
　尚、本発明に記載の撮像レンズＬＮは、上記構成に限られるものではない。例えば、ガラスまたはプラスチック製の各レンズＬ１～Ｌ３を個別に成形し、接合させずに鏡筒ＨＬＤ内に収容してもよい。また、レンズの偏心を合わせるためにレンズ外周部または鏡筒ＨＬＤに嵌合部を設けてもよい。 The imaging lens LN described in the present invention is not limited to the above configuration. For example, the lenses L1 to L3 made of glass or plastic may be individually molded and accommodated in the lens barrel HLD without being joined. Further, in order to adjust the eccentricity of the lens, a fitting portion may be provided on the lens outer peripheral portion or the lens barrel HLD.
　本実施の形態の撮像レンズＬＮは、以下の条件式を満足する。
　０．９＜ｆ１／ｆ＜１．５　　　　（１）
　－３＜ｒ２／ｒ３＜－０．２　　　（２）
　－０．１＜（ｒ５＋ｒ６）／（ｒ５－ｒ６）＜３．０　　　（３）
　０．１８＜ｄ１／ｆ＜０．５　　　（４）
但し、
ｆ１　：第１レンズＬ１の焦点距離
ｆ　　：撮像レンズ全系の焦点距離
ｒ２　：第１レンズＬ１像側面の近軸曲率半径
ｒ３　：第２レンズＬ２物体側面の近軸曲率半径
ｒ５　：第３レンズＬ３物体側面の近軸曲率半径
ｒ６　：第３レンズＬ３像側面の近軸曲率半径
ｄ１　：第１レンズＬ１物体側面から像側面までの光軸上の距離 The imaging lens LN of the present embodiment satisfies the following conditional expression.
0.9 <f1 / f <1.5 (1)
-3 <r2 / r3 <-0.2 (2)
-0.1 <(r5 + r6) / (r5-r6) <3.0 (3)
0.18 <d1 / f <0.5 (4)
However,
f1: Focal length of the first lens L1 f: Focal length r2 of the entire imaging lens system: Paraxial radius of curvature r3 of the first lens L1 image side surface Paraxial radius of curvature r5 of the second lens L2 object side surface: Third lens L3 Paraxial curvature radius r6 of the object side surface: Paraxial curvature radius d1 of the third lens L3 image side surface: Distance on the optical axis from the first lens L1 object side surface to the image side surface
　上記イメージセンサＩＭは、その受光側の平面の中央部に、画素（光電変換素子）が２次元的に配置された、受光部としての光電変換部ＩＭａが形成されており、不図示の信号処理回路に接続されている。かかる信号処理回路は、各画素を順次駆動し信号電荷を得る駆動回路部と、各信号電荷をデジタル信号に変換するＡ／Ｄ変換部と、このデジタル信号を用いて画像信号出力を形成する信号処理部等から構成されている。また、イメージセンサＩＭの受光側の平面の外縁近傍には、多数のパッド（図示略）が配置されており、不図示のワイヤを介してイメージセンサＩＭに接続されている。イメージセンサＩＭは、光電変換部ＩＭａからの信号電荷をデジタルＹＵＶ信号等の画像信号等に変換し、ワイヤ（不図示）を介して所定の回路に出力する。ここで、Ｙは輝度信号、Ｕ（＝Ｒ－Ｙ）は赤と輝度信号との色差信号、Ｖ（＝Ｂ－Ｙ）は青と輝度信号との色差信号である。なお、固体撮像素子は上記ＣＭＯＳ型のイメージセンサに限定されるものではなく、ＣＣＤ等の他のものを使用しても良い。 In the image sensor IM, a photoelectric conversion unit IMa as a light receiving unit in which pixels (photoelectric conversion elements) are two-dimensionally arranged is formed in the center of a plane on the light receiving side, and signal processing (not shown) is performed. Connected to the circuit. Such a signal processing circuit includes a drive circuit unit that sequentially drives each pixel to obtain a signal charge, an A / D conversion unit that converts each signal charge into a digital signal, and a signal that forms an image signal output using the digital signal. It consists of a processing unit and the like. A number of pads (not shown) are arranged near the outer edge of the light receiving side plane of the image sensor IM, and are connected to the image sensor IM via wires (not shown). The image sensor IM converts a signal charge from the photoelectric conversion unit IMa into an image signal such as a digital YUV signal and outputs the image signal to a predetermined circuit via a wire (not shown). Here, Y is a luminance signal, U (= RY) is a color difference signal between red and the luminance signal, and V (= BY) is a color difference signal between blue and the luminance signal. Note that the solid-state imaging device is not limited to the CMOS image sensor, and other devices such as a CCD may be used.
　イメージセンサＩＭは、外部接続用端子を介して外部回路（例えば、撮像装置を実装した携帯端末の上位装置が有する制御回路）と接続し、外部回路からイメージセンサＩＭを駆動するための電圧やクロック信号の供給を受けたり、また、デジタルＹＵＶ信号を外部回路へ出力したりすることを可能とする。 The image sensor IM is connected to an external circuit (for example, a control circuit included in a host device of a portable terminal mounted with an imaging device) via an external connection terminal, and a voltage or a clock for driving the image sensor IM from the external circuit. It is possible to receive a signal and to output a digital YUV signal to an external circuit.
　次に、撮像装置を備えた携帯端末の一例として携帯電話機を図３，４の外観図に基づいて説明する。なお、図３は折り畳んだ携帯電話機を開いて内側から見た図であり、図４は折り畳んだ携帯電話機を開いて外側から見た図である。 Next, a mobile phone as an example of a mobile terminal provided with an imaging device will be described with reference to the external views of FIGS. 3 is a view of the folded mobile phone as viewed from the inside, and FIG. 4 is a view of the folded mobile phone as viewed from the outside.
　図３，４において、携帯電話機Ｔは、表示画面Ｄ１，Ｄ２を備えたケースとしての上筐体７１と、操作ボタンＢを備えた下筐体７２とがヒンジ７３を介して連結されている。本実施の形態においては、風景等を撮影するためのメインの撮像装置ＭＣが、上筐体７１の表面側に設けられ、上述した広角の撮像レンズＬＮを備える撮像装置ＬＵが、上筐体７１の裏面側であって表示画面Ｄ１の上に設けられている。 3 and 4, in the mobile phone T, an upper casing 71 as a case having display screens D1 and D2 and a lower casing 72 having operation buttons B are connected via a hinge 73. In the present embodiment, the main imaging device MC for photographing a landscape or the like is provided on the surface side of the upper housing 71, and the imaging device LU including the above-described wide-angle imaging lens LN is the upper housing 71. And provided on the display screen D1.
　撮像レンズＬＮは、図３に示すように撮像装置ＬＵに正対した状態で、携帯電話機Ｔを手で把持した使用者自身の上半身を撮像装置ＬＵにより撮像できる。本実施の形態の撮像レンズＬＮは、撮像装置ＬＵのコンパクト化に貢献し、且つ広角でＦナンバーが明るいため、このような撮影に好適である。その画像信号を通信している相手方の携帯電話機に送信して、こちらのユーザーの画像を表示できると共に、通常の通話を行うことにより、いわゆるテレビ電話を実現できる。なお、携帯電話機Ｔは折り畳み式に限定されるものではない。 The imaging lens LN can image the upper body of the user himself / herself holding the mobile phone T with his / her hand in the state of facing the imaging device LU as shown in FIG. The imaging lens LN of the present embodiment contributes to the compactness of the imaging device LU, and is suitable for such photographing because it has a wide angle and a bright F number. By transmitting the image signal to the mobile phone of the other party that is communicating and displaying the image of this user, a so-called videophone can be realized by making a normal call. The mobile phone T is not limited to a folding type.
（実施例）
　次に、上述した実施の形態に好適な実施例について説明する。但し、以下に示す実施例により本発明が限定されるものではない。実施例における各符号の意味は以下の通りである（長さの単位は、波長以外ｍｍ）。
ＦＬ：撮像レンズ全系の焦点距離（ｍｍ）
ＢＦ：バックフォーカス（ｍｍ）（但し、カバーガラス込みの近軸像面までの距離）
Ｆｎｏ　：Ｆナンバー
ｗ　：半画角（゜）
Ｙｍａｘ：固体撮像素子の撮像面対角線長の半分の長さ（ｍｍ）
ＴＬ：撮像レンズ全系の最も物体側のレンズ面から像側焦点までの光軸上の距離（ｍｍ）（但し、「像側焦点」とは、撮像レンズに光軸と平行な平行光線が入射した場合の像点をいう。）
ｒ　：屈折面の曲率半径（ｍｍ）
ｄ　：軸上面間隔（ｍｍ）
ｎｄ：レンズ材料のｄ線の常温での屈折率
ｖｄ：レンズ材料のアッベ数
ＳＴＯ：開口絞り (Example)
Next, examples suitable for the above-described embodiment will be described. However, the present invention is not limited to the following examples. The meaning of each code | symbol in an Example is as follows (a unit of length is mm other than a wavelength).
FL: Focal length of the entire imaging lens system (mm)
BF: Back focus (mm) (however, distance to paraxial image plane including cover glass)
Fno: F number w: Half angle of view (°)
Ymax: half length (mm) of the diagonal length of the imaging surface of the solid-state imaging device
TL: Distance (mm) on the optical axis from the lens surface closest to the object side to the image-side focal point of the entire imaging lens system (however, “image-side focal point” means that parallel rays parallel to the optical axis are incident on the imaging lens. This is the image point when
r: radius of curvature of refractive surface (mm)
d: Distance between shaft upper surfaces (mm)
nd: Refractive index of lens material at d-line at room temperature vd: Abbe number of lens material STO: Aperture stop
　各実施例において、各面番号の後に「＊」が記載されている面が非球面形状を有する面であり、非球面の形状は、面の頂点を原点とし、光軸方向にＸ軸をとり、光軸と垂直方向の高さをｈとして以下の「数１」で表す。 In each embodiment, the surface described with “*” after each surface number is a surface having an aspheric shape, and the shape of the aspheric surface has the vertex of the surface as the origin and the X axis in the optical axis direction. The height in the direction perpendicular to the optical axis is represented by the following “Equation 1”.
Figure JPOXMLDOC01-appb-M000001
 ただし、
Ａｉ：ｉ次の非球面係数
Ｒ　：曲率半径
Ｋ　：円錐定数
である。
Figure JPOXMLDOC01-appb-M000001
 However,
Ai: i-th order aspherical coefficient R: radius of curvature K: conic constant.
　また、以降（表のレンズデータを含む）において、１０のべき乗数（例えば、２．５×１０-02）をＥまたはｅ（例えば２．５ｅ－００２）を用いて表すものとする。また、レンズデータの面番号は第１レンズの物体側を１面として順に付与した。なお、実施例に記載の長さを表す数値の単位はすべてｍｍとする。 In the following (including the lens data in the table), a power of 10 (for example, 2.5 × 10 −02 ) is represented using E or e (for example, 2.5e−002). The surface number of the lens data was given in order with the object side of the first lens as one surface. In addition, the unit of the numerical value showing the length as described in an Example shall be mm.
　なお、請求項ならびに実施例に記載の近軸曲率半径の意味合いについて、実際のレンズ測定の場面においては、レンズ中央近傍(具体的には、レンズ外径に対して10%以内の中央領域)での形状測定値を最小自乗法でフィッティングした際の近似曲率半径を近軸曲率半径であるとみなすことができる。また、例えば2次の非球面係数を使用した場合には、非球面定義式の基準曲率半径に2次の非球面係数も勘案した曲率半径を近軸曲率半径とみなすことができる。（例えば参考文献として、松居吉哉著「レンズ設計法」(共立出版株式会社)のP41～42を参照のこと） Incidentally, regarding the meaning of the paraxial radius of curvature described in the claims and the examples, in the actual lens measurement scene, in the vicinity of the center of the lens (specifically, the central region within 10% of the lens outer diameter). The approximate radius of curvature when the measured shape of the shape is fitted by the method of least squares can be regarded as the paraxial radius of curvature. For example, when a secondary aspherical coefficient is used, a radius of curvature that takes into account the secondary aspherical coefficient in the reference curvature radius of the aspherical definition formula can be regarded as a paraxial curvature radius. (For example, see pages 41 to 42 of Yoshiya Matsui's “Lens Design Method” (Kyoritsu Publishing Co., Ltd.) for reference)
（実施例１）
　実施例１におけるレンズデータを表１に示す。図５は実施例１のレンズの断面図である。実施例１の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 1)
Table 1 shows lens data in Example 1. 5 is a sectional view of the lens of Example 1. FIG. The imaging lens of Example 1 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2 having a positive refractive power, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表1］
[実施例1]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0540
   3*      0.8606      0.4890   　1.58313  59.44
   4*      2.0071      0.2570
   5*     -2.0733      0.5110   　1.58313  59.44
   6*     -0.6943      0.0500
   7*      1e+018      0.4500   　1.58313  59.44
   8*      0.9880      0.2160
   9       1e+018      0.2100   　1.52310  54.49
  10       1e+018      0.2683
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-1.30010e+001,A3=-6.14640e-002,A4=3.15580e+000,A5=-3.32680e+000,A6=-5.31990e+000,A7=0.00000e+000,A8=-1.24250e+001,A9=0.00000e+000,A10=9.51540e+002,A11=0.00000e+000,A12=-8.11230e+003,A13=0.00000e+000,A14=2.25920e+004,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=1.00000e+001,A3=0.00000e+000,A4=-4.83238e-002,A5=0.00000e+000,A6=7.28849e+000,A7=0.00000e+000,A8=-1.03218e+002,A9=0.00000e+000,A10=7.96653e+002,A11=0.00000e+000,A12=-2.56732e+003,A13=0.00000e+000,A14=-2.57071e+002,A15=0.00000e+000,A16=1.30778e+004,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
5:K=-3.14500e+001,A3=-1.20510e-001,A4=-1.58460e-001,A5=-3.88480e-001,A6=4.92580e+000,A7=0.00000e+000,A8=-7.10300e+001,A9=0.00000e+000,A10=6.50140e+002,A11=0.00000e+000,A12=-3.08060e+003,A13=0.00000e+000,A14=7.51640e+003,A15=0.00000e+000,A16=-7.55150e+003,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
6:K=-5.06210e+000,A4=-1.23770e+000,A6=4.47770e+000,A8=-1.06290e+001,A10=2.09850e+001,A12=-1.11890e+001,A14=-6.32490e+000,A16=-2.78530e+000,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-5.57720e-001,A5=0.00000e+000,A6=-3.89730e-001,A7=0.00000e+000,A8=3.89390e+000,A9=0.00000e+000,A10=-5.97670e+000,A11=0.00000e+000,A12=2.96330e+000,A13=0.00000e+000,A14=9.60810e-001,A15=0.00000e+000,A16=-9.89190e-001,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-3.56660e-001,A3=0.00000e+000,A4=-1.03780e+000,A5=0.00000e+000,A6=9.89190e-001,A7=0.00000e+000,A8=-7.02670e-001,A9=0.00000e+000,A10=2.27500e-002,A11=0.00000e+000,A12=3.15910e-001,A13=0.00000e+000,A14=-2.14930e-001,A15=0.00000e+000,A16=4.06740e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.803mm
 Fno       2.780
   w       35.44゜
Ymax       1.295mm
  BF       0.694mm
  TL       2.451mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.233mm
   2     5- 6       1.575mm
   3     7- 8      -1.694mm
[table 1]
[Example 1]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0540
3 * 0.8606 0.4890 1.58313 59.44
4 * 2.0071 0.2570
5 * -2.0733 0.5110 1.58313 59.44
6 * -0.6943 0.0500
7 * 1e + 018 0.4500 1.58313 59.44
8 * 0.9880 0.2160
9 1e + 018 0.2100 1.52310 54.49
10 1e + 018 0.2683
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.30010e + 001, A3 = -6.14640e-002, A4 = 3.15580e + 000, A5 = -3.32680e + 000, A6 = -5.31990e + 000, A7 = 0.00000e + 000, A8 = -1.24250e + 001, A9 = 0.00000e + 000, A10 = 9.51540e + 002, A11 = 0.00000e + 000, A12 = -8.11230e + 003, A13 = 0.00000e + 000, A14 = 2.25920e + 004, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 1.00000e + 001, A3 = 0.00000e + 000, A4 = -4.83238e-002, A5 = 0.00000e + 000, A6 = 7.28849e + 000, A7 = 0.00000e + 000, A8 = -1.03218e + 002, A9 = 0.00000e + 000, A10 = 7.96653e + 002, A11 = 0.00000e + 000, A12 = -2.56732e + 003, A13 = 0.00000e + 000, A14 = -2.57071e + 002, A15 = 0.00000 e + 000, A16 = 1.30778e + 004, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = -3.14500e + 001, A3 = -1.20510e-001, A4 = -1.58460e-001, A5 = -3.88480e-001, A6 = 4.92580e + 000, A7 = 0.00000e + 000, A8 = -7.10300e + 001, A9 = 0.00000e + 000, A10 = 6.50140e + 002, A11 = 0.00000e + 000, A12 = -3.08060e + 003, A13 = 0.00000e + 000, A14 = 7.51640e + 003, A15 = 0.00000e + 000, A16 = -7.55150e + 003, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -5.06210e + 000, A4 = -1.23770e + 000, A6 = 4.47770e + 000, A8 = -1.06290e + 001, A10 = 2.09850e + 001, A12 = -1.11890e + 001, A14 = -6.32490e + 000, A16 = -2.78530e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -5.57720e-001, A5 = 0.00000e + 000, A6 = -3.89730e-001, A7 = 0.00000e + 000, A8 = 3.89390e + 000, A9 = 0.00000e + 000, A10 = -5.97670e + 000, A11 = 0.00000e + 000, A12 = 2.96330e + 000, A13 = 0.00000e + 000, A14 = 9.60810e-001, A15 = 0.00000e + 000, A16 = -9.89190e-001, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -3.56660e-001, A3 = 0.00000e + 000, A4 = -1.03780e + 000, A5 = 0.00000e + 000, A6 = 9.89190e-001, A7 = 0.00000e + 000, A8 = -7.02670 e-001, A9 = 0.00000e + 000, A10 = 2.27500e-002, A11 = 0.00000e + 000, A12 = 3.15910e-001, A13 = 0.00000e + 000, A14 = -2.14930e-001, A15 = 0.00000 e + 000, A16 = 4.06740e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.803mm
Fno 2.780
w 35.44 °
Ymax 1.295mm
BF 0.694mm
TL 2.451mm

Elem Surfs Focal Length
1 3- 4 2.233mm
2 5--6 1.575mm
3 7-8 -1.694mm
　図６は実施例１の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。ここで、球面収差図において、実線はｄ線、点線はｇ線に対する球面収差量をそれぞれ表し、非点収差図において、実線はサジタル面、点線はメリディオナル面を表す（以下、同じ）。 FIG. 6 is an aberration diagram of Example 1 (spherical aberration (a), astigmatism (b), distortion (c)). Here, in the spherical aberration diagram, the solid line represents the spherical aberration amount with respect to the d line and the dotted line, respectively, and in the astigmatism diagram, the solid line represents the sagittal surface and the dotted line represents the meridional surface (hereinafter the same).
（実施例２）
　実施例２におけるレンズデータを表２に示す。図７は実施例２のレンズの断面図である。実施例２の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 2)
Table 2 shows lens data in Example 2. FIG. 7 is a sectional view of the lens of Example 2. The imaging lens of Example 2 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表２］
[実施例2]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.1173
   3*      0.6465      0.4010   　1.58313  59.44
   4*      1.2537      0.2450
   5*     -2.4412      0.4018   　1.58313  59.44
   6*     -1.0173      0.1209
   7*     -27.0359     0.4158   　1.58313  59.44
   8*      1.2804      0.1827
   9       1e+018      0.1450   　1.51633  64.14
  10       1e+018      0.2147
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-9.85234e+000,A4=4.33389e+000,A6=-2.52893e+001,A8=1.07836e+002,A10=2.28829e+002,A12=-4.05009e+003,A14=1.13135e+004,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
4:K=1.45514e+000,A4=7.09325e-001,A6=-1.39592e+000,A8=8.52761e+001,A10=-7.75323e+002,A12=3.17675e+003,A14=-4.99608e+002,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=-2.59840e+000,A4=-1.64483e-001,A6=3.26907e+000,A8=-1.22912e+002,A10=1.36493e+003,A12=-7.17936e+003,A14=1.79065e+004,A16=-1.83999e+004,A18=0.00000e+000,A20=0.00000e+000
6:K=-1.88242e+001,A4=-1.77959e+000,A6=6.23496e+000,A8=-1.60096e+001,A10=5.15534e+001,A12=-4.98601e+001,A14=-1.01401e+002,A16=1.54188e+002,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-1.41854e+000,A5=0.00000e+000,A6=5.04547e-001,A7=0.00000e+000,A8=7.73830e+000,A9=0.00000e+000,A10=-1.30649e+001,A11=0.00000e+000,A12=4.24582e+000,A13=0.00000e+000,A14=4.95653e+000,A15=0.00000e+000,A16=-3.06028e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=2.51907e-001,A3=0.00000e+000,A4=-1.23037e+000,A5=0.00000e+000,A6=1.58196e+000,A7=0.00000e+000,A8=-1.45211e+000,A9=0.00000e+000,A10=2.43251e-001,A11=0.00000e+000,A12=7.13730e-001,A13=0.00000e+000,A14=-6.37125e-001,A15=0.00000e+000,A16=1.63590e-001,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.769mm
 Fno       2.400
   w       35.40゜
Ymax       1.295mm
  BF       0.542mm
  TL       2.127mm

 Elem   Surfs   　Focal Length
   1     3- 4       1.841mm
   2     5- 6       2.709mm
   3     7- 8      -2.085mm [Table 2]
[Example 2]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.1173
3 * 0.6465 0.4010 1.58313 59.44
4 * 1.2537 0.2450
5 * -2.4412 0.4018 1.58313 59.44
6 * -1.0173 0.1209
7 * -27.0359 0.4158 1.58313 59.44
8 * 1.2804 0.1827
9 1e + 018 0.1450 1.51633 64.14
10 1e + 018 0.2147
IMG INFINITY

ASPHERICAL SURFACE
3: K = -9.85234e + 000, A4 = 4.33389e + 000, A6 = -2.52893e + 001, A8 = 1.07836e + 002, A10 = 2.28829e + 002, A12 = -4.05009e + 003, A14 = 1.13135 e + 004, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 1.45514e + 000, A4 = 7.09325e-001, A6 = -1.39592e + 000, A8 = 8.52761e + 001, A10 = -7.75323e + 002, A12 = 3.17675e + 003, A14 = -4.99608 e + 002, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = -2.59840e + 000, A4 = -1.64483e-001, A6 = 3.26907e + 000, A8 = -1.22912e + 002, A10 = 1.36493e + 003, A12 = -7.17936e + 003, A14 = 1.79065e + 004, A16 = -1.83999e + 004, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -1.88242e + 001, A4 = -1.77959e + 000, A6 = 6.23496e + 000, A8 = -1.60096e + 001, A10 = 5.15534e + 001, A12 = -4.98601e + 001, A14 = -1.01401e + 002, A16 = 1.54188e + 002, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -1.41854e + 000, A5 = 0.00000e + 000, A6 = 5.04547e-001, A7 = 0.00000e + 000, A8 = 7.73830e + 000, A9 = 0.00000e + 000, A10 = -1.30649e + 001, A11 = 0.00000e + 000, A12 = 4.24582e + 000, A13 = 0.00000e + 000, A14 = 4.95653e + 000, A15 = 0.00000e + 000, A16 = -3.06028e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = 2.51907e-001, A3 = 0.00000e + 000, A4 = -1.23037e + 000, A5 = 0.00000e + 000, A6 = 1.58196e + 000, A7 = 0.00000e + 000, A8 = -1.45211e + 000, A9 = 0.00000e + 000, A10 = 2.43251e-001, A11 = 0.00000e + 000, A12 = 7.13730e-001, A13 = 0.00000e + 000, A14 = -6.37125e-001, A15 = 0.00000e + 000, A16 = 1.63590e-001, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.769mm
Fno 2.400
w 35.40 °
Ymax 1.295mm
BF 0.542mm
TL 2.127mm

Elem Surfs Focal Length
1 3- 4 1.841mm
2 5--6 2.709mm
3 7-8 -2.085mm
　図８は実施例２の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 8 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例３）
　実施例３におけるレンズデータを表３に示す。図９は実施例３のレンズの断面図である。実施例３の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 3)
Table 3 shows lens data in Example 3. FIG. 9 is a sectional view of the lens of Example 3. The imaging lens of Example 3 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表３］
[実施例3]
Reference Wave Length = 587.56 nm
SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0890
   3*      0.7538      0.4140   　1.58313  59.44
   4*      1.7595      0.3299
   5*     -1.3661      0.3546   　1.58313  59.44
   6*     -0.8976      0.0200
   7*      1.9338      0.4469   　1.58313  59.44
   8*      0.9643      0.4166
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.0460
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-1.02298e+001,A3=-4.71951e-002,A4=3.21614e+000,A5=-2.10501e-001,A6=-1.73204e+001,A7=0.00000e+000,A8=8.02584e+001,A9=0.00000e+000,A10=1.96253e+001,A11=0.00000e+000,A12=-1.94373e+003,A13=0.00000e+000,A14=5.97425e+003,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=6.40445e+000,A4=2.52384e-001,A6=-8.77264e-001,A8=2.20570e+001,A10=-1.72648e+002,A12=6.51289e+002,A14=-6.00426e+002,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=-2.15812e+001,A4=-5.67335e-001,A6=2.07946e+000,A8=-9.29274e+001,A10=1.04042e+003,A12=-5.76618e+003,A14=1.68506e+004,A16=-2.12551e+004,A18=0.00000e+000,A20=0.00000e+000
6:K=-1.40891e+001,A4=-1.93827e+000,A6=5.08491e+000,A8=-1.62450e+001,A10=5.10933e+001,A12=-3.01929e+001,A14=-3.93449e+001,A16=-4.53094e+000,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-1.44793e+000,A5=0.00000e+000,A6=-3.65941e-001,A7=0.00000e+000,A8=6.55839e+000,A9=0.00000e+000,A10=-7.26979e+000,A11=0.00000e+000,A12=9.98861e-001,A13=0.00000e+000,A14=8.11267e-001,A15=0.00000e+000,A16=5.20526e-001,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-2.90917e-001,A3=0.00000e+000,A4=-1.28121e+000,A5=0.00000e+000,A6=1.36460e+000,A7=0.00000e+000,A8=-1.17266e+000,A9=0.00000e+000,A10=5.86706e-002,A11=0.00000e+000,A12=6.23348e-001,A13=0.00000e+000,A14=-4.00205e-001,A15=0.00000e+000,A16=5.15907e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.731mm
 Fno       2.420
   w       34.95゜
Ymax       1.234mm
  BF       0.673mm
  TL       2.238mm

 Elem   Surfs   　Focal Length
   1     3- 4       1.964mm
   2     5- 6       3.510mm
   3     7- 8      -3.973mm
[Table 3]
[Example 3]
Reference Wave Length = 587.56 nm
SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0890
3 * 0.7538 0.4140 1.58313 59.44
4 * 1.7595 0.3299
5 * -1.3661 0.3546 1.58313 59.44
6 * -0.8976 0.0200
7 * 1.9338 0.4469 1.58313 59.44
8 * 0.9643 0.4166
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.0460
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.02298e + 001, A3 = -4.71951e-002, A4 = 3.21614e + 000, A5 = -2.10501e-001, A6 = -1.73204e + 001, A7 = 0.00000e + 000, A8 = 8.02584e + 001, A9 = 0.00000e + 000, A10 = 1.96253e + 001, A11 = 0.00000e + 000, A12 = -1.94373e + 003, A13 = 0.00000e + 000, A14 = 5.97425e + 003, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 6.40445e + 000, A4 = 2.52384e-001, A6 = -8.77264e-001, A8 = 2.20570e + 001, A10 = -1.72648e + 002, A12 = 6.51289e + 002, A14 = -6.00426 e + 002, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = -2.15812e + 001, A4 = -5.67335e-001, A6 = 2.07946e + 000, A8 = -9.29274e + 001, A10 = 1.04042e + 003, A12 = -5.76618e + 003, A14 = 1.68506e + 004, A16 = -2.12551e + 004, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -1.40891e + 001, A4 = -1.93827e + 000, A6 = 5.08491e + 000, A8 = -1.62450e + 001, A10 = 5.10933e + 001, A12 = -3.01929e + 001, A14 = -3.93449e + 001, A16 = -4.53094e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -1.44793e + 000, A5 = 0.00000e + 000, A6 = -3.65941e-001, A7 = 0.00000e + 000, A8 = 6.55839e + 000, A9 = 0.00000e + 000, A10 = -7.26979e + 000, A11 = 0.00000e + 000, A12 = 9.98861e-001, A13 = 0.00000e + 000, A14 = 8.11267e-001, A15 = 0.00000e + 000, A16 = 5.20526e-001, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -2.90917e-001, A3 = 0.00000e + 000, A4 = -1.28121e + 000, A5 = 0.00000e + 000, A6 = 1.36460e + 000, A7 = 0.00000e + 000, A8 = -1.17266 e + 000, A9 = 0.00000e + 000, A10 = 5.86706e-002, A11 = 0.00000e + 000, A12 = 6.23348e-001, A13 = 0.00000e + 000, A14 = -4.00205e-001, A15 = 0.00000 e + 000, A16 = 5.15907e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.731mm
Fno 2.420
w 34.95 °
Ymax 1.234mm
BF 0.673mm
TL 2.238mm

Elem Surfs Focal Length
1 3- 4 1.964mm
2 5--6 3.510mm
3 7-8 -3.973mm
　図１０は実施例３の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 10 is an aberration diagram of Example 3 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例４）
　実施例４におけるレンズデータを表４に示す。図１１は実施例４のレンズの断面図である。実施例４の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 4)
Table 4 shows lens data in Example 4. FIG. 11 is a sectional view of the lens of Example 4. The imaging lens of Example 4 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表４］
[実施例4]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       8e+017     -0.0856
   3*      0.5341      0.3066   　1.58313  59.44
   4*      1.0461      0.2241
   5*     -1.3219      0.3255   　1.58313  59.44
   6*     -0.6708      0.0200
   7*      2.2903      0.3022   　1.58313  59.44
   8*      0.7430      0.1827
   9       1e+018      0.1450   　1.51633  64.14
  10       1e+018      0.2246
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-1.26588e+001,A4=9.60213e+000,A6=-1.01995e+002,A8=6.99594e+002,A10=2.90205e+003,A12=-7.58814e+004,A14=3.37048e+005,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
4:K=-1.08216e+000,A4=1.71624e+000,A6=-1.16538e+001,A8=5.83475e+002,A10=-7.99398e+003,A12=5.06305e+004,A14=-7.12124e+004,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=-3.18826e+000,A4=-2.34538e-001,A6=1.62040e+001,A8=-8.15451e+002,A10=1.49262e+004,A12=-1.35044e+005,A14=6.17716e+005,A16=-1.19743e+006,A18=0.00000e+000,A20=0.00000e+000
6:K=-9.80067e+000,A4=-3.93296e+000,A6=2.15066e+001,A8=-1.00633e+002,A10=5.97575e+002,A12=-9.06078e+002,A14=-3.37693e+003,A16=7.95303e+003,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-3.37645e+000,A5=0.00000e+000,A6=1.85582e+000,A7=0.00000e+000,A8=5.03646e+001,A9=0.00000e+000,A10=-1.45583e+002,A11=0.00000e+000,A12=8.22027e+001,A13=0.00000e+000,A14=1.65261e+002,A15=0.00000e+000,A16=-1.80383e+002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-4.71896e-001,A3=0.00000e+000,A4=-3.04237e+000,A5=0.00000e+000,A6=6.39625e+000,A7=0.00000e+000,A8=-9.66583e+000,A9=0.00000e+000,A10=2.96920e+000,A11=0.00000e+000,A12=1.36719e+001,A13=0.00000e+000,A14=-2.03550e+001,A15=0.00000e+000,A16=9.47952e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.389mm
 Fno       2.400
   w       34.95゜
Ymax       0.991mm
  BF       0.552mm
  TL       1.731mm

 Elem   Surfs   　Focal Length
   1     3- 4       1.533mm
   2     5- 6       1.972mm
   3     7- 8      -2.032mm
[Table 4]
[Example 4]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 8e + 017 -0.0856
3 * 0.5341 0.3066 1.58313 59.44
4 * 1.0461 0.2241
5 * -1.3219 0.3255 1.58313 59.44
6 * -0.6708 0.0200
7 * 2.2903 0.3022 1.58313 59.44
8 * 0.7430 0.1827
9 1e + 018 0.1450 1.51633 64.14
10 1e + 018 0.2246
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.26588e + 001, A4 = 9.60213e + 000, A6 = -1.01995e + 002, A8 = 6.99594e + 002, A10 = 2.90205e + 003, A12 = -7.58814e + 004, A14 = 3.37048 e + 005, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = -1.08216e + 000, A4 = 1.71624e + 000, A6 = -1.16538e + 001, A8 = 5.83475e + 002, A10 = -7.99398e + 003, A12 = 5.06305e + 004, A14 =- 7.12124e + 004, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = -3.18826e + 000, A4 = -2.34538e-001, A6 = 1.62040e + 001, A8 = -8.15451e + 002, A10 = 1.49262e + 004, A12 = -1.35044e + 005, A14 = 6.17716e + 005, A16 = -1.19743e + 006, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -9.80067e + 000, A4 = -3.93296e + 000, A6 = 2.15066e + 001, A8 = -1.00633e + 002, A10 = 5.97575e + 002, A12 = -9.06078e + 002, A14 = -3.37693e + 003, A16 = 7.95303e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -3.37645e + 000, A5 = 0.00000e + 000, A6 = 1.85582e + 000, A7 = 0.00000e + 000, A8 = 5.03646e + 001, A9 = 0.00000e + 000, A10 = -1.45583e + 002, A11 = 0.00000e + 000, A12 = 8.22027e + 001, A13 = 0.00000e + 000, A14 = 1.65261e + 002, A15 = 0.00000e + 000, A16 = -1.80383e + 002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -4.71896e-001, A3 = 0.00000e + 000, A4 = -3.04237e + 000, A5 = 0.00000e + 000, A6 = 6.39625e + 000, A7 = 0.00000e + 000, A8 = -9.66583 e + 000, A9 = 0.00000e + 000, A10 = 2.96920e + 000, A11 = 0.00000e + 000, A12 = 1.36719e + 001, A13 = 0.00000e + 000, A14 = -2.03550e + 001, A15 = 0.00000 e + 000, A16 = 9.47952e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.389mm
Fno 2.400
w 34.95 °
Ymax 0.991mm
BF 0.552mm
TL 1.731mm

Elem Surfs Focal Length
1 3- 4 1.533mm
2 5- 6 1.972mm
3 7-8 -2.032mm
　図１２は実施例４の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 12 is an aberration diagram of Example 4 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例５）
　実施例５におけるレンズデータを表５に示す。図１３は実施例５のレンズの断面図である。実施例５の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 5)
Table 5 shows lens data in Example 5. FIG. 13 is a sectional view of the lens of Example 5. The imaging lens of Example 5 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表５］
[実施例5]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       8e+017     -0.0605
   3*      0.6765      0.3664   　1.58313  59.44
   4*      2.2475      0.1870
   5*     -1.2310      0.3599   　1.58313  59.44
   6*     -0.6254      0.0200
   7*      2.1231      0.3172   　1.58313  59.44
   8*      0.6577      0.1827
   9       1e+018      0.1450   　1.51633  64.14
  10       1e+018      0.2421
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-2.19950e+001,A4=7.80295e+000,A6=-9.87169e+001,A8=7.18215e+002,A10=2.50870e+003,A12=-7.86986e+004,A14=3.66405e+005,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
4:K=-3.39252e+001,A4=1.01601e+000,A6=-1.96136e+001,A8=5.39391e+002,A10=-7.67207e+003,A12=5.08502e+004,A14=-1.31428e+005,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=5.76245e-001,A4=3.41969e-001,A6=1.56094e+001,A8=-7.84281e+002,A10=1.48108e+004,A12=-1.35992e+005,A14=6.18436e+005,A16=-1.15417e+006,A18=0.00000e+000,A20=0.00000e+000
6:K=-7.16419e+000,A4=-3.32814e+000,A6=2.05520e+001,A8=-1.03770e+002,A10=6.04532e+002,A12=-8.20612e+002,A14=-3.41528e+003,A16=7.70186e+003,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-3.02355e+000,A5=0.00000e+000,A6=2.64229e-001,A7=0.00000e+000,A8=4.87949e+001,A9=0.00000e+000,A10=-1.42302e+002,A11=0.00000e+000,A12=9.73283e+001,A13=0.00000e+000,A14=1.84249e+002,A15=0.00000e+000,A16=-2.64982e+002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-5.61472e-001,A3=0.00000e+000,A4=-3.18554e+000,A5=0.00000e+000,A6=6.64254e+000,A7=0.00000e+000,A8=-9.71900e+000,A9=0.00000e+000,A10=2.77755e+000,A11=0.00000e+000,A12=1.33813e+001,A13=0.00000e+000,A14=-2.05057e+001,A15=0.00000e+000,A16=9.44739e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.380mm
 Fno       2.400   
   w       34.95゜
Ymax       0.991mm
  BF       0.570mm
  TL       1.820mm

 Elem   Surfs   　Focal Length
   1     3- 4       1.528mm
   2     5- 6       1.789mm
   3     7- 8      -1.776mm
[Table 5]
[Example 5]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 8e + 017 -0.0605
3 * 0.6765 0.3664 1.58313 59.44
4 * 2.2475 0.1870
5 * -1.2310 0.3599 1.58313 59.44
6 * -0.6254 0.0200
7 * 2.1231 0.3172 1.58313 59.44
8 * 0.6577 0.1827
9 1e + 018 0.1450 1.51633 64.14
10 1e + 018 0.2421
IMG INFINITY

ASPHERICAL SURFACE
3: K = -2.19950e + 001, A4 = 7.80295e + 000, A6 = -9.87169e + 001, A8 = 7.18215e + 002, A10 = 2.50870e + 003, A12 = -7.86986e + 004, A14 = 3.66405 e + 005, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = -3.39252e + 001, A4 = 1.01601e + 000, A6 = -1.96136e + 001, A8 = 5.39391e + 002, A10 = -7.67207e + 003, A12 = 5.08502e + 004, A14 =- 1.31428e + 005, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 5.76245e-001, A4 = 3.41969e-001, A6 = 1.56094e + 001, A8 = -7.84281e + 002, A10 = 1.48108e + 004, A12 = -1.35992e + 005, A14 = 6.18436e + 005, A16 = -1.15417e + 006, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -7.16419e + 000, A4 = -3.32814e + 000, A6 = 2.05520e + 001, A8 = -1.03770e + 002, A10 = 6.04532e + 002, A12 = -8.20612e + 002, A14 = -3.41528e + 003, A16 = 7.70186e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -3.02355e + 000, A5 = 0.00000e + 000, A6 = 2.64229e-001, A7 = 0.00000e + 000, A8 = 4.87949e + 001, A9 = 0.00000e + 000, A10 = -1.42302e + 002, A11 = 0.00000e + 000, A12 = 9.73283e + 001, A13 = 0.00000e + 000, A14 = 1.84249e + 002, A15 = 0.00000e + 000, A16 = -2.64982e + 002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -5.61472e-001, A3 = 0.00000e + 000, A4 = -3.18554e + 000, A5 = 0.00000e + 000, A6 = 6.64254e + 000, A7 = 0.00000e + 000, A8 = -9.71900 e + 000, A9 = 0.00000e + 000, A10 = 2.77755e + 000, A11 = 0.00000e + 000, A12 = 1.33813e + 001, A13 = 0.00000e + 000, A14 = -2.05057e + 001, A15 = 0.00000 e + 000, A16 = 9.44739e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.380mm
Fno 2.400
w 34.95 °
Ymax 0.991mm
BF 0.570mm
TL 1.820mm

Elem Surfs Focal Length
1 3- 4 1.528mm
2 5--6 1.789mm
3 7-8 -1.776mm
　図１４は実施例５の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 14 is an aberration diagram of Example 5 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例６）
　実施例６におけるレンズデータを表６に示す。図１５は実施例６のレンズの断面図である。実施例６の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 6)
Table 6 shows lens data in Example 6. FIG. 15 is a sectional view of the lens of Example 6. The imaging lens of Example 6 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表６］
[実施例6]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0855
   3*      0.8011      0.3237   　1.54470  55.99
   4*      2.2836      0.3157
   5*     -1.4368      0.5530   　1.54470  55.99
   6*     -0.6722      0.1758
   7*      1.7519      0.2902   　1.63200  23.39
   8*      0.6802      0.3956
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.0695
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-9.87779e+000,A3=-6.55027e-002,A4=3.44426e+000,A5=-7.76118e+000,A6=1.56862e+001,A7=0.00000e+000,A8=-1.36462e+002,A9=0.00000e+000,A10=1.25602e+003,A11=0.00000e+000,A12=-5.94589e+003,A13=0.00000e+000,A14=1.12813e+004,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+0004:K=1.89046e+001,A4=2.28559e-001,A6=-1.70359e+000,A8=3.53529e+001,A10=-2.49739e+002,A12=1.03705e+003,A14=-1.29823e+003,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=-5.00000e+001,A4=-2.49136e+000,A6=1.70116e+001,A8=-1.85904e+002,A10=1.37438e+003,A12=-6.16703e+003,A14=1.58146e+004,A16=-1.67733e+004,A18=0.00000e+000,A20=0.00000e+000
6:K=-5.57638e+000,A4=-2.14824e+000,A6=5.66201e+000,A8=-1.48783e+001,A10=2.84402e+001,A12=-2.59328e+001,A14=-8.71478e+000,A16=6.33991e+001,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-1.79161e+000,A5=0.00000e+000,A6=2.84819e-001,A7=0.00000e+000,A8=6.57807e+000,A9=0.00000e+000,A10=-1.10690e+001,A11=0.00000e+000,A12=1.74363e+000,A13=0.00000e+000,A14=8.77950e+000,A15=0.00000e+000,A16=-5.88319e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-3.75175e+000,A3=0.00000e+000,A4=-1.07137e+000,A5=0.00000e+000,A6=1.46707e+000,A7=0.00000e+000,A8=-1.04080e+000,A9=0.00000e+000,A10=-1.16349e-003,A11=0.00000e+000,A12=5.26393e-001,A13=0.00000e+000,A14=-3.55775e-001,A15=0.00000e+000,A16=7.45061e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.720mm
 Fno       2.400   
   w       34.95゜
Ymax       1.233mm
  BF       0.675mm
  TL       2.333mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.104mm
   2     5- 6       1.848mm
   3     7- 8      -1.965mm
[Table 6]
[Example 6]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0855
3 * 0.8011 0.3237 1.54470 55.99
4 * 2.2836 0.3157
5 * -1.4368 0.5530 1.54470 55.99
6 * -0.6722 0.1758
7 * 1.7519 0.2902 1.63200 23.39
8 * 0.6802 0.3956
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.0695
IMG INFINITY

ASPHERICAL SURFACE
3: K = -9.87779e + 000, A3 = -6.55027e-002, A4 = 3.44426e + 000, A5 = -7.76118e + 000, A6 = 1.56862e + 001, A7 = 0.00000e + 000, A8 =- 1.36462e + 002, A9 = 0.00000e + 000, A10 = 1.25602e + 003, A11 = 0.00000e + 000, A12 = -5.94589e + 003, A13 = 0.00000e + 000, A14 = 1.12813e + 004, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 0004: K = 1.89046e + 001, A4 = 2.28559 e-001, A6 = -1.70359e + 000, A8 = 3.53529e + 001, A10 = -2.49739e + 002, A12 = 1.03705e + 003, A14 = -1.29823e + 003, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = -5.00000e + 001, A4 = -2.49136e + 000, A6 = 1.70116e + 001, A8 = -1.85904e + 002, A10 = 1.37438e + 003, A12 = -6.16703e + 003, A14 = 1.58146e + 004, A16 = -1.67733e + 004, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -5.57638e + 000, A4 = -2.14824e + 000, A6 = 5.66201e + 000, A8 = -1.48783e + 001, A10 = 2.84402e + 001, A12 = -2.59328e + 001, A14 = -8.71478e + 000, A16 = 6.33991e + 001, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -1.79161e + 000, A5 = 0.00000e + 000, A6 = 2.84819e-001, A7 = 0.00000e + 000, A8 = 6.57807e + 000, A9 = 0.00000e + 000, A10 = -1.10690e + 001, A11 = 0.00000e + 000, A12 = 1.74363e + 000, A13 = 0.00000e + 000, A14 = 8.77950e + 000, A15 = 0.00000e + 000, A16 = -5.88319e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -3.75175e + 000, A3 = 0.00000e + 000, A4 = -1.07137e + 000, A5 = 0.00000e + 000, A6 = 1.46707e + 000, A7 = 0.00000e + 000, A8 = -1.04080 e + 000, A9 = 0.00000e + 000, A10 = -1.16349e-003, A11 = 0.00000e + 000, A12 = 5.26393e-001, A13 = 0.00000e + 000, A14 = -3.55775e-001, A15 = 0.00000e + 000, A16 = 7.45061e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.720mm
Fno 2.400
w 34.95 °
Ymax 1.233mm
BF 0.675mm
TL 2.333mm

Elem Surfs Focal Length
1 3- 4 2.104mm
2 5--6 1.848mm
3 7-8 -1.965mm
　図１６は実施例６の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 16 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例７）
　実施例７におけるレンズデータを表７に示す。図１７は実施例７のレンズの断面図である。実施例７の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 7)
Table 7 shows lens data in Example 7. FIG. 17 is a sectional view of the lens of Example 7. The imaging lens of Example 7 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表７］
[実施例7]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0950
   3*      0.8100      0.4970   　1.58313  59.44
   4*      1.8120      0.2860
   5*     -2.6965      0.4920   　1.58313  59.44
   6*     -0.8337      0.0500
   7*      1e+018      0.4500   　1.58313  59.44
   8*      1.0328      0.2120
   9       1e+018      0.1750   　1.51633  64.14
  10       1e+018      0.2389
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-1.09130e+001,A3=-4.28630e-002,A4=2.72130e+000,A5=-1.73630e-001,A6=-1.39980e+001,A7=0.00000e+000,A8=6.19930e+001,A9=0.00000e+000,A10=8.17240e+000,A11=0.00000e+000,A12=-1.30390e+003,A13=0.00000e+000,A14=3.68140e+003,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=-7.10230e-001,A4=3.05050e-001,A6=1.15600e+000,A8=3.13370e+000,A10=-7.87290e+001,A12=4.39260e+002,A14=-7.01600e+002,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=9.36420e-001,A4=-3.38170e-001,A6=4.90530e+000,A8=-7.81990e+001,A10=6.90310e+002,A12=-3.41590e+003,A14=8.90940e+003,A16=-9.71660e+003,A18=0.00000e+000,A20=0.00000e+000
6:K=-7.19890e+000,A4=-1.51010e+000,A6=4.39310e+000,A8=-1.02880e+001,A10=2.37390e+001,A12=-1.65960e+001,A14=-1.37720e+001,A16=1.42310e+001,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-1.14210e+000,A5=0.00000e+000,A6=5.77640e-002,A7=0.00000e+000,A8=4.51270e+000,A9=0.00000e+000,A10=-6.42750e+000,A11=0.00000e+000,A12=3.16230e+000,A13=0.00000e+000,A14=7.43000e-001,A15=0.00000e+000,A16=-1.13770e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-2.52380e-001,A4=-1.05890e+000,A6=1.00030e+000,A8=-7.52190e-001,A10=1.65600e-002,A12=3.61580e-001,A14=-2.28690e-001,A16=3.47470e-002,A18=0.00000e+000,A20=0.00000e+000

  FL       1.858mm
 Fno       2.420
   w       34.47゜
Ymax       1.295mm
  BF       0.626mm
  TL       2.401mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.124mm
   2     5- 6       1.886mm
   3     7- 8      -1.771mm
[Table 7]
[Example 7]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0950
3 * 0.8100 0.4970 1.58313 59.44
4 * 1.8 120 0.2860
5 * -2.6965 0.4920 1.58313 59.44
6 * -0.8337 0.0500
7 * 1e + 018 0.4500 1.58313 59.44
8 * 1.0328 0.2120
9 1e + 018 0.1750 1.51633 64.14
10 1e + 018 0.2389
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.09130e + 001, A3 = -4.28630e-002, A4 = 2.72130e + 000, A5 = -1.73630e-001, A6 = -1.39980e + 001, A7 = 0.00000e + 000, A8 = 6.19930e + 001, A9 = 0.00000e + 000, A10 = 8.17240e + 000, A11 = 0.00000e + 000, A12 = -1.30390e + 003, A13 = 0.00000e + 000, A14 = 3.68140e + 003, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = -7.10230e-001, A4 = 3.05050e-001, A6 = 1.15600e + 000, A8 = 3.13370e + 000, A10 = -7.87290e + 001, A12 = 4.39260e + 002, A14 = -7.01600 e + 002, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 9.36420e-001, A4 = -3.38170e-001, A6 = 4.90530e + 000, A8 = -7.81990e + 001, A10 = 6.90310e + 002, A12 = -3.41590e + 003, A14 = 8.90940 e + 003, A16 = -9.71660e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -7.19890e + 000, A4 = -1.51010e + 000, A6 = 4.39310e + 000, A8 = -1.02880e + 001, A10 = 2.37390e + 001, A12 = -1.65960e + 001, A14 = -1.37720e + 001, A16 = 1.42310e + 001, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -1.14210e + 000, A5 = 0.00000e + 000, A6 = 5.77640e-002, A7 = 0.00000e + 000, A8 = 4.51270e + 000, A9 = 0.00000e + 000, A10 = -6.42750e + 000, A11 = 0.00000e + 000, A12 = 3.16230e + 000, A13 = 0.00000e + 000, A14 = 7.43000e-001, A15 = 0.00000e + 000, A16 = -1.13770e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -2.52380e-001, A4 = -1.05890e + 000, A6 = 1.00030e + 000, A8 = -7.52190e-001, A10 = 1.65600e-002, A12 = 3.61580e-001, A14 =- 2.28690e-001, A16 = 3.47470e-002, A18 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.858mm
Fno 2.420
w 34.47 °
Ymax 1.295mm
BF 0.626mm
TL 2.401mm

Elem Surfs Focal Length
1 3- 4 2.124mm
2 5--6 1.886mm
3 7-8 -1.771mm
　図１８は実施例７の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 18 is an aberration diagram of Example 7 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例８）
　実施例８におけるレンズデータを表８に示す。図１９は実施例８のレンズの断面図である。実施例８の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 8)
Table 8 shows lens data in Example 8. FIG. 19 is a sectional view of the lens of Example 8. The imaging lens of Example 8 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表８］
[実施例8]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       9e+017     -0.0940
   3*      0.8725      0.5130   　1.58313  59.44
   4*      1.7620      0.4000
   5*     -3.1758      0.5280   　1.58313  59.44
   6*     -1.0426      0.1030
   7*      1e+020      0.4520   　1.58313  59.44
   8*      1.2574      0.2050
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.3214
 IMG     INFINITY     

ASPHERICAL SURFACE
3:K=-1.06660e+001,A4=1.94190e+000,A6=-7.85770e+000,A8=2.76230e+001,A10=-8.51860e-001,A12=-3.80390e+002,A14=9.37710e+002,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
4:K=1.48910e+000,A4=2.85310e-001,A6=4.86070e-002,A8=3.10470e+000,A10=-3.84290e+000,A12=-3.29300e+001,A14=1.49880e+002,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=7.67660e+000,A4=-1.21580e-001,A6=1.95950e+000,A8=-3.28920e+001,A10=2.43670e+002,A12=-9.56010e+002,A14=1.92260e+003,A16=-1.58860e+003,A18=0.00000e+000,A20=0.00000e+000
6:K=-9.43740e+000,A4=-9.98920e-001,A6=2.37560e+000,A8=-4.77930e+000,A10=8.10950e+000,A12=-4.75270e+000,A14=-2.59250e+000,A16=2.65170e+000,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A4=-7.94090e-001,A6=1.85940e-002,A8=1.93190e+000,A10=-2.31150e+000,A12=8.67520e-001,A14=2.62540e-001,A16=-2.17920e-001,A18=0.00000e+000,A20=0.00000e+000
8:K=-1.90790e-001,A4=-7.43050e-001,A6=5.73280e-001,A8=-3.18710e-001,A10=-1.09810e-004,A12=9.67330e-002,A14=-4.97220e-002,A16=7.54580e-003,A18=0.00000e+000,A20=0.00000e+000

  FL       2.218mm
 Fno       2.800
   w       34.21゜
Ymax       1.545mm
  BF       0.736mm
  TL       2.732mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.444mm
   2     5- 6       2.439mm
   3     7- 8      -2.156mm
[Table 8]
[Example 8]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 9e + 017 -0.0940
3 * 0.8725 0.5130 1.58313 59.44
4 * 1.7620 0.4000
5 * -3.1758 0.5280 1.58313 59.44
6 * -1.0426 0.1030
7 * 1e + 020 0.4520 1.58313 59.44
8 * 1.2574 0.2050
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.3214
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.06660e + 001, A4 = 1.94190e + 000, A6 = -7.85770e + 000, A8 = 2.76230e + 001, A10 = -8.51860e-001, A12 = -3.80390e + 002, A14 = 9.37710e + 002, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 1.48910e + 000, A4 = 2.85310e-001, A6 = 4.86070e-002, A8 = 3.10470e + 000, A10 = -3.84290e + 000, A12 = -3.29300e + 001, A14 = 1.49880e + 002, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 7.67660e + 000, A4 = -1.21580e-001, A6 = 1.95950e + 000, A8 = -3.28920e + 001, A10 = 2.43670e + 002, A12 = -9.56010e + 002, A14 = 1.92260 e + 003, A16 = -1.58860e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -9.43740e + 000, A4 = -9.98920e-001, A6 = 2.37560e + 000, A8 = -4.77930e + 000, A10 = 8.10950e + 000, A12 = -4.75270e + 000, A14 = -2.59250e + 000, A16 = 2.65170e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A4 = -7.94090e-001, A6 = 1.85940e-002, A8 = 1.93190e + 000, A10 = -2.31150e + 000, A12 = 8.67520e-001, A14 = 2.62540e -001, A16 = -2.17920e-001, A18 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -1.90790e-001, A4 = -7.43050e-001, A6 = 5.73280e-001, A8 = -3.18710e-001, A10 = -1.09810e-004, A12 = 9.67330e-002, A14 = -4.97220e-002, A16 = 7.54580e-003, A18 = 0.00000e + 000, A20 = 0.00000e + 000

FL 2.218mm
Fno 2.800
w 34.21 °
Ymax 1.545mm
BF 0.736mm
TL 2.732mm

Elem Surfs Focal Length
1 3- 4 2.444mm
2 5--6 2.439mm
3 7-8 -2.156mm
　図２０は実施例８の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 20 is an aberration diagram of Example 8 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例９）
　実施例９におけるレンズデータを表９に示す。図２１は実施例９のレンズの断面図である。実施例９の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 Example 9
Table 9 shows lens data in Example 9. FIG. 21 is a sectional view of the lens of Example 9. The imaging lens of Example 9 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表９］
[実施例9]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0554
   3*      0.8130      0.3376   　1.58313  59.44
   4*      1.9159      0.4237
   5*     -9.1229      0.5201   　1.58313  59.44
   6*     -0.8074      0.1447
   7*     -1.5112      0.3500   　1.58313  59.44
   8*      1.8101      0.1655
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.1780
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-8.41137e+000,A3=-1.89085e-001,A4=3.26293e+000,A5=-3.27022e+000,A6=-5.22303e+000,A7=0.00000e+000,A8=-7.38156e+000,A9=0.00000e+000,A10=9.32430e+002,A11=0.00000e+000,A12=-8.10202e+003,A13=0.00000e+000,A14=2.20764e+004,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=1.95777e+001,A4=-9.73005e-002,A6=6.00918e-002,A8=-9.62410e+000,A10=-1.26856e+002,A12=1.85600e+003,A14=-8.14407e+003,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=5.00000e+001,A4=-5.01089e-001,A6=4.58089e+000,A8=-7.58649e+001,A10=6.51015e+002,A12=-3.05960e+003,A14=7.49193e+003,A16=-7.64498e+003,A18=0.00000e+000,A20=0.00000e+000
6:K=-7.82824e+000,A4=-1.43882e+000,A6=4.12154e+000,A8=-1.06296e+001,A10=2.12637e+001,A12=-1.18091e+001,A14=-7.27818e+000,A16=2.58626e+000,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-6.78548e-001,A5=0.00000e+000,A6=-2.85546e-001,A7=0.00000e+000,A8=4.12093e+000,A9=0.00000e+000,A10=-5.67624e+000,A11=0.00000e+000,A12=3.19559e+000,A13=0.00000e+000,A14=9.18131e-001,A15=0.00000e+000,A16=-1.80888e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=1.01272e+000,A3=0.00000e+000,A4=-6.84353e-001,A5=0.00000e+000,A6=7.32018e-001,A7=0.00000e+000,A8=-5.87425e-001,A9=0.00000e+000,A10=2.97702e-002,A11=0.00000e+000,A12=2.99710e-001,A13=0.00000e+000,A14=-2.28302e-001,A15=0.00000e+000,A16=5.37851e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.814mm
 Fno       2.780
   w       34.49゜
Ymax       1.295mm
  BF       0.554mm
  TL       2.230mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.177mm
   2     5- 6       1.485mm
   3     7- 8      -1.360mm
[Table 9]
[Example 9]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0554
3 * 0.8130 0.3376 1.58313 59.44
4 * 1.9159 0.4237
5 * -9.1229 0.5201 1.58313 59.44
6 * -0.8074 0.1447
7 * -1.5112 0.3500 1.58313 59.44
8 * 1.8101 0.1655
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.1780
IMG INFINITY

ASPHERICAL SURFACE
3: K = -8.41137e + 000, A3 = -1.89085e-001, A4 = 3.26293e + 000, A5 = -3.27022e + 000, A6 = -5.22303e + 000, A7 = 0.00000e + 000, A8 = -7.38156e + 000, A9 = 0.00000e + 000, A10 = 9.32430e + 002, A11 = 0.00000e + 000, A12 = -8.10202e + 003, A13 = 0.00000e + 000, A14 = 2.20764e + 004, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 1.95777e + 001, A4 = -9.73005e-002, A6 = 6.00918e-002, A8 = -9.62410e + 000, A10 = -1.26856e + 002, A12 = 1.85600e + 003, A14 =- 8.14407e + 003, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 5.00000e + 001, A4 = -5.01089e-001, A6 = 4.58089e + 000, A8 = -7.58649e + 001, A10 = 6.51015e + 002, A12 = -3.05960e + 003, A14 = 7.49193 e + 003, A16 = -7.64498e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -7.82824e + 000, A4 = -1.43882e + 000, A6 = 4.12154e + 000, A8 = -1.06296e + 001, A10 = 2.12637e + 001, A12 = -1.18091e + 001, A14 = -7.27818e + 000, A16 = 2.58626e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -6.78548e-001, A5 = 0.00000e + 000, A6 = -2.85546e-001, A7 = 0.00000e + 000, A8 = 4.12093e + 000, A9 = 0.00000e + 000, A10 = -5.67624e + 000, A11 = 0.00000e + 000, A12 = 3.19559e + 000, A13 = 0.00000e + 000, A14 = 9.18131e-001, A15 = 0.00000e + 000, A16 = -1.80888e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = 1.01272e + 000, A3 = 0.00000e + 000, A4 = -6.84353e-001, A5 = 0.00000e + 000, A6 = 7.32018e-001, A7 = 0.00000e + 000, A8 = -5.87425e -001, A9 = 0.00000e + 000, A10 = 2.97702e-002, A11 = 0.00000e + 000, A12 = 2.99710e-001, A13 = 0.00000e + 000, A14 = -2.28302e-001, A15 = 0.00000e + 000, A16 = 5.37851e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.814mm
Fno 2.780
w 34.49 °
Ymax 1.295mm
BF 0.554mm
TL 2.230mm

Elem Surfs Focal Length
1 3- 4 2.177mm
2 5--6 1.485mm
3 7-8 -1.360mm
　図２２は実施例９の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 22 is an aberration diagram of Example 9 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例１０）
　実施例１０におけるレンズデータを表１０に示す。図２３は実施例１０のレンズの断面図である。実施例１０の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 10)
Table 10 shows lens data in Example 10. FIG. 23 is a sectional view of the lens of Example 10. The imaging lens of Example 10 includes, in order from the object side, an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表１０］
[実施例10]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0286
   3*      0.9743      0.7072   　1.58313  59.44
   4*      4.3185      0.1584
   5*     -1.4890      0.3542   　1.58313  59.44
   6*     -0.8520      0.0575
   7*      2.0908      0.4305   　1.58313  59.44
   8*      1.0186      0.1657
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.2581
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-1.49646e+001,A3=-2.40163e-001,A4=3.19329e+000,A5=-3.12984e+000,A6=-5.17692e+000,A7=0.00000e+000,A8=-1.78454e+001,A9=0.00000e+000,A10=8.55955e+002,A11=0.00000e+000,A12=-8.04824e+003,A13=0.00000e+000,A14=2.86045e+004,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=2.55757e+001,A4=-1.59434e-001,A6=3.62896e+000,A8=-2.34729e+001,A10=-2.01401e+002,A12=1.89444e+003,A14=-4.54269e+003,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=8.18681e+000,A4=2.39407e-001,A6=5.15397e+000,A8=-7.60391e+001,A10=6.42980e+002,A12=-3.06012e+003,A14=7.53016e+003,A16=-8.06855e+003,A18=0.00000e+000,A20=0.00000e+000
6:K=-1.24645e+001,A4=-1.64885e+000,A6=4.81635e+000,A8=-9.27638e+000,A10=2.07419e+001,A12=-1.07214e+001,A14=-9.09638e+000,A16=-5.03441e-001,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-9.04595e-001,A5=0.00000e+000,A6=-4.50738e-001,A7=0.00000e+000,A8=3.99429e+000,A9=0.00000e+000,A10=-5.81707e+000,A11=0.00000e+000,A12=3.02672e+000,A13=0.00000e+000,A14=8.76283e-001,A15=0.00000e+000,A16=-1.08086e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-2.99939e-001,A3=0.00000e+000,A4=-9.97211e-001,A5=0.00000e+000,A6=9.56039e-001,A7=0.00000e+000,A8=-7.50568e-001,A9=0.00000e+000,A10=1.47239e-002,A11=0.00000e+000,A12=3.45320e-001,A13=0.00000e+000,A14=-2.04576e-001,A15=0.00000e+000,A16=2.23757e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.626mm
 Fno       2.780
   w       37.13゜
Ymax       1.295mm
  BF       0.634mm
  TL       2.342mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.002mm
   2     5- 6       2.835mm
   3     7- 8      -3.997mm
[Table 10]
[Example 10]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0286
3 * 0.9743 0.7072 1.58313 59.44
4 * 4.3185 0.1584
5 * -1.4890 0.3542 1.58313 59.44
6 * -0.8520 0.0575
7 * 2.0908 0.4305 1.58313 59.44
8 * 1.0186 0.1657
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.2581
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.49646e + 001, A3 = -2.40163e-001, A4 = 3.19329e + 000, A5 = -3.12984e + 000, A6 = -5.17692e + 000, A7 = 0.00000e + 000, A8 = -1.78454e + 001, A9 = 0.00000e + 000, A10 = 8.55955e + 002, A11 = 0.00000e + 000, A12 = -8.04824e + 003, A13 = 0.00000e + 000, A14 = 2.86045e + 004, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 2.55757e + 001, A4 = -1.59434e-001, A6 = 3.62896e + 000, A8 = -2.34729e + 001, A10 = -2.01401e + 002, A12 = 1.89444e + 003, A14 =- 4.54269e + 003, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 8.18681e + 000, A4 = 2.39407e-001, A6 = 5.15397e + 000, A8 = -7.60391e + 001, A10 = 6.42980e + 002, A12 = -3.06012e + 003, A14 = 7.53016e + 003, A16 = -8.06855e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -1.24645e + 001, A4 = -1.64885e + 000, A6 = 4.81635e + 000, A8 = -9.27638e + 000, A10 = 2.07419e + 001, A12 = -1.07214e + 001, A14 = -9.09638e + 000, A16 = -5.03441e-001, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -9.04595e-001, A5 = 0.00000e + 000, A6 = -4.50738e-001, A7 = 0.00000e + 000, A8 = 3.99429e + 000, A9 = 0.00000e + 000, A10 = -5.81707e + 000, A11 = 0.00000e + 000, A12 = 3.02672e + 000, A13 = 0.00000e + 000, A14 = 8.76283e-001, A15 = 0.00000e + 000, A16 = -1.08086e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -2.99939e-001, A3 = 0.00000e + 000, A4 = -9.97211e-001, A5 = 0.00000e + 000, A6 = 9.56039e-001, A7 = 0.00000e + 000, A8 = -7.50568 e-001, A9 = 0.00000e + 000, A10 = 1.47239e-002, A11 = 0.00000e + 000, A12 = 3.45320e-001, A13 = 0.00000e + 000, A14 = -2.04576e-001, A15 = 0.00000 e + 000, A16 = 2.23757e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.626mm
Fno 2.780
w 37.13 °
Ymax 1.295mm
BF 0.634mm
TL 2.342mm

Elem Surfs Focal Length
1 3- 4 2.002mm
2 5--6 2.835mm
3 7-8 -3.997mm
　図２４は実施例１０の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 24 is an aberration diagram of Example 10 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例１１）
　実施例１１におけるレンズデータを表１１に示す。図２５は実施例１１のレンズの断面図である。実施例１１の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 11)
Lens data in Example 11 are shown in Table 11. FIG. 25 is a sectional view of the lens of Example 11. In order from the object side, the imaging lens of Example 11 includes an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表１１］
[実施例11]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0571
   3*      0.8510      0.3450   　1.62263  58.15
   4*      2.1048      0.2332
   5*    -10.0229      0.4259   　1.58313  59.44
   6*     -2.9321      0.2234
   7*      2.7076      0.5863  　 1.84666  23.77
   8*      1.3367      0.1655
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.1831
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-1.08683e+001,A3=-1.12840e-001,A4=3.16999e+000,A5=-3.38775e+000,A6=-5.45615e+000,A7=0.00000e+000,A8=-6.77783e+000,A9=0.00000e+000,A10=9.30488e+002,A11=0.00000e+000,A12=-8.03887e+003,A13=0.00000e+000,A14=2.20880e+004,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=2.07977e+001,A4=-2.67623e-001,A6=2.86720e+000,A8=-1.76914e+001,A10=-1.70949e+002,A12=1.95820e+003,A14=-5.94950e+003,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=5.00000e+001,A4=-6.32855e-001,A6=5.04883e+000,A8=-7.48966e+001,A10=6.50885e+002,A12=-3.05342e+003,A14=7.54526e+003,A16=-7.78250e+003,A18=0.00000e+000,A20=0.00000e+000
6:K=1.00070e+001,A4=-1.54318e+000,A6=3.96374e+000,A8=-1.01460e+001,A10=2.23854e+001,A12=-1.02205e+001,A14=-2.44162e+000,A16=3.82496e+001,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-1.56360e+000,A5=0.00000e+000,A6=-4.03352e-001,A7=0.00000e+000,A8=3.50762e+000,A9=0.00000e+000,A10=-6.06646e+000,A11=0.00000e+000,A12=3.96505e+000,A13=0.00000e+000,A14=3.15211e+000,A15=0.00000e+000,A16=-9.46297e-001,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=1.29493e-001,A3=0.00000e+000,A4=-9.94064e-001,A5=0.00000e+000,A6=9.39003e-001,A7=0.00000e+000,A8=-6.74724e-001,A9=0.00000e+000,A10=2.49046e-002,A11=0.00000e+000,A12=3.28650e-001,A13=0.00000e+000,A14=-2.18876e-001,A15=0.00000e+000,A16=4.13213e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.824mm
 Fno       2.780 
   w       35.24゜
Ymax       1.295mm
  BF       0.559mm
  TL       2.372mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.075mm
   2     5- 6       6.953mm
   3     7- 8      -3.879mm
[Table 11]
[Example 11]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0571
3 * 0.8510 0.3450 1.62263 58.15
4 * 2.1048 0.2332
5 * -10.0229 0.4259 1.58313 59.44
6 * -2.9321 0.2234
7 * 2.7076 0.5863 1.84666 23.77
8 * 1.3367 0.1655
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.1831
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.08683e + 001, A3 = -1.12840e-001, A4 = 3.16999e + 000, A5 = -3.38775e + 000, A6 = -5.45615e + 000, A7 = 0.00000e + 000, A8 = -6.77783e + 000, A9 = 0.00000e + 000, A10 = 9.30488e + 002, A11 = 0.00000e + 000, A12 = -8.03887e + 003, A13 = 0.00000e + 000, A14 = 2.20880e + 004, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 2.07977e + 001, A4 = -2.67623e-001, A6 = 2.86720e + 000, A8 = -1.76914e + 001, A10 = -1.70949e + 002, A12 = 1.95820e + 003, A14 =- 5.94950e + 003, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 5.00000e + 001, A4 = -6.32855e-001, A6 = 5.04883e + 000, A8 = -7.48966e + 001, A10 = 6.50885e + 002, A12 = -3.05342e + 003, A14 = 7.54526 e + 003, A16 = -7.78250e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = 1.00070e + 001, A4 = -1.54318e + 000, A6 = 3.96374e + 000, A8 = -1.01460e + 001, A10 = 2.23854e + 001, A12 = -1.02205e + 001, A14 =- 2.44162e + 000, A16 = 3.82496e + 001, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -1.56360e + 000, A5 = 0.00000e + 000, A6 = -4.03352e-001, A7 = 0.00000e + 000, A8 = 3.50762e + 000, A9 = 0.00000e + 000, A10 = -6.06646e + 000, A11 = 0.00000e + 000, A12 = 3.96505e + 000, A13 = 0.00000e + 000, A14 = 3.15211e + 000, A15 = 0.00000e + 000, A16 = -9.46297e-001, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = 1.29493e-001, A3 = 0.00000e + 000, A4 = -9.94064e-001, A5 = 0.00000e + 000, A6 = 9.39003e-001, A7 = 0.00000e + 000, A8 = -6.74724e -001, A9 = 0.00000e + 000, A10 = 2.49046e-002, A11 = 0.00000e + 000, A12 = 3.28650e-001, A13 = 0.00000e + 000, A14 = -2.18876e-001, A15 = 0.00000e + 000, A16 = 4.13213e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.824mm
Fno 2.780
w 35.24 °
Ymax 1.295mm
BF 0.559mm
TL 2.372mm

Elem Surfs Focal Length
1 3- 4 2.075mm
2 5--6 6.953mm
3 7-8 -3.879mm
　図２６は実施例１１の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 26 is an aberration diagram of Example 11 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例１２）
　実施例１２におけるレンズデータを表１２に示す。図２７は実施例１２のレンズの断面図である。実施例１２の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 Example 12
Lens data in Example 12 are shown in Table 12. FIG. 27 is a sectional view of the lens of Example 12. In order from the object side, the imaging lens of Example 12 includes an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表１２］
[実施例12]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0006
   3*      0.8526      0.4288   　1.58313  59.44
   4*      1.9004      0.3118
   5*     -3.3942      0.4370   　1.58313  59.46
   6*     -1.2270      0.0500
   7*      4.5253      0.6291   　1.58313  59.45
   8*      2.2340      0.1655
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.2015
 IMG     INFINITY      

ASPHERICAL SURFACE
3:K=-9.56855e+000,A3=-1.88182e-001,A4=3.23385e+000,A5=-3.22726e+000,A6=-5.29017e+000,A7=0.00000e+000,A8=-7.46570e+000,A9=0.00000e+000,A10=9.10064e+002,A11=0.00000e+000,A12=-8.16189e+003,A13=0.00000e+000,A14=2.35815e+004,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=1.67143e+001,A4=-5.06610e-001,A6=3.92492e+000,A8=-1.70602e+001,A10=-1.84434e+002,A12=1.84284e+003,A14=-5.52663e+003,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=4.16616e+001,A4=-3.52990e-001,A6=3.50700e+000,A8=-7.39884e+001,A10=6.56610e+002,A12=-3.05812e+003,A14=7.49659e+003,A16=-7.79121e+003,A18=0.00000e+000,A20=0.00000e+000
6:K=-5.00000e+001,A4=-1.76547e+000,A6=4.41047e+000,A8=-1.07403e+001,A10=2.12245e+001,A12=-1.19162e+001,A14=-7.35682e+000,A16=-8.94720e-001,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-5.69869e-001,A5=0.00000e+000,A6=-5.28980e-001,A7=0.00000e+000,A8=4.03618e+000,A9=0.00000e+000,A10=-5.84274e+000,A11=0.00000e+000,A12=3.01323e+000,A13=0.00000e+000,A14=8.66247e-001,A15=0.00000e+000,A16=-1.31120e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=1.05588e+000,A3=0.00000e+000,A4=-4.15488e-001,A5=0.00000e+000,A6=5.98068e-001,A7=0.00000e+000,A8=-6.52239e-001,A9=0.00000e+000,A10=8.68266e-002,A11=0.00000e+000,A12=3.46025e-001,A13=0.00000e+000,A14=-2.24614e-001,A15=0.00000e+000,A16=3.77636e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.684mm
 Fno       2.780
   w       34.73゜
Ymax       1.295mm
  BF       0.577mm
  TL       2.434mm

 Elem   Surfs   　Focal Length
   1     3- 4       2.304mm
   2     5- 6       3.068mm
   3     7- 8      -8.418mm
[Table 12]
[Example 12]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0006
3 * 0.8526 0.4288 1.58313 59.44
4 * 1.9004 0.3118
5 * -3.3942 0.4370 1.58313 59.46
6 * -1.2270 0.0500
7 * 4.5253 0.6291 1.58313 59.45
8 * 2.2340 0.1655
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.2015
IMG INFINITY

ASPHERICAL SURFACE
3: K = -9.56855e + 000, A3 = -1.88182e-001, A4 = 3.23385e + 000, A5 = -3.22726e + 000, A6 = -5.29017e + 000, A7 = 0.00000e + 000, A8 = -7.46570e + 000, A9 = 0.00000e + 000, A10 = 9.10064e + 002, A11 = 0.00000e + 000, A12 = -8.16189e + 003, A13 = 0.00000e + 000, A14 = 2.35815e + 004, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 1.67143e + 001, A4 = -5.06610e-001, A6 = 3.92492e + 000, A8 = -1.70602e + 001, A10 = -1.84434e + 002, A12 = 1.84284e + 003, A14 =- 5.52663e + 003, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 4.16616e + 001, A4 = -3.52990e-001, A6 = 3.50700e + 000, A8 = -7.39884e + 001, A10 = 6.56610e + 002, A12 = -3.05812e + 003, A14 = 7.49659 e + 003, A16 = -7.79121e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = -5.00000e + 001, A4 = -1.76547e + 000, A6 = 4.41047e + 000, A8 = -1.07403e + 001, A10 = 2.12245e + 001, A12 = -1.19162e + 001, A14 = -7.35682e + 000, A16 = -8.94720e-001, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -5.69869e-001, A5 = 0.00000e + 000, A6 = -5.28980e-001, A7 = 0.00000e + 000, A8 = 4.03618e + 000, A9 = 0.00000e + 000, A10 = -5.84274e + 000, A11 = 0.00000e + 000, A12 = 3.01323e + 000, A13 = 0.00000e + 000, A14 = 8.66247e-001, A15 = 0.00000e + 000, A16 = -1.31120e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = 1.05588e + 000, A3 = 0.00000e + 000, A4 = -4.15488e-001, A5 = 0.00000e + 000, A6 = 5.98068e-001, A7 = 0.00000e + 000, A8 = -6.52239e -001, A9 = 0.00000e + 000, A10 = 8.68266e-002, A11 = 0.00000e + 000, A12 = 3.46025e-001, A13 = 0.00000e + 000, A14 = -2.24614e-001, A15 = 0.00000e + 000, A16 = 3.77636e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.684mm
Fno 2.780
w 34.73 °
Ymax 1.295mm
BF 0.577mm
TL 2.434mm

Elem Surfs Focal Length
1 3- 4 2.304mm
2 5- 6 3.068mm
3 7-8 -8.418mm
　図２８は実施例１２の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 28 is an aberration diagram of Example 12 (spherical aberration (a), astigmatism (b), distortion (c)).
（実施例１３）
　実施例１３におけるレンズデータを表１３に示す。図２９は実施例１３のレンズの断面図である。実施例１３の撮像レンズは、物体側から順に、開口絞りＡｐｅ、物体側に凸面を備え正の屈折力を有する第１レンズＬ１、第２レンズＬ２、負の屈折力を有する第３レンズＬ３から成る。第１レンズＬ１は物体側が凸面、像側が凹面の物凸メニスカス形状である。第２レンズＬ２は物体側が凹面であり、像側面が凸面である。第３レンズＬ３は像側面が凹面でかつ周辺部に凸面を有する。ＩＲＣＦはＩＲカットフィルタであり、ＩＭは固体撮像素子の撮像面である。 (Example 13)
Table 13 shows lens data in Example 13. FIG. 29 is a sectional view of the lens of Example 13. In order from the object side, the imaging lens of Example 13 has an aperture stop Ape, a first lens L1 having a convex surface on the object side, a second lens L2, and a third lens L3 having a negative refractive power. Become. The first lens L1 has an object-convex meniscus shape having a convex surface on the object side and a concave surface on the image side. The second lens L2 has a concave surface on the object side and a convex surface on the image side. The third lens L3 has a concave image side surface and a convex surface at the periphery. IRCF is an IR cut filter, and IM is an imaging surface of the solid-state imaging device.
［表１３］
[実施例13]
Reference Wave Length = 587.56 nm

SURF DATA
 NUM.       r           d          nd     vd
 OBJ     INFINITY    350.0000
   1       1e+018      0.0500
 STO       1e+018     -0.0629
   3*      0.8033      0.3640   　1.58313  59.44
   4*      3.3547      0.2000
   5*     -2.3040      0.3997   　1.58313  59.44
   6*     -2.7830      0.1222
   7*      3.0976      0.7111   　1.69895  30.04
   8*      1.5292      0.1655
   9       1e+018      0.2100   　1.51633  64.14
  10       1e+018      0.2349
 IMG     INFINITY     

ASPHERICAL SURFACE
3:K=-1.10538e+001,A3=-5.34071e-002,A4=3.22509e+000,A5=-3.34795e+000,A6=-5.81095e+000,A7=0.00000e+000,A8=-9.80495e+000,A9=0.00000e+000,A10=9.51223e+002,A11=0.00000e+000,A12=-7.89805e+003,A13=0.00000e+000,A14=2.06845e+004,A15=0.00000e+000,A16=0.00000e+000,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
4:K=1.96543e+001,A4=-1.89880e-001,A6=1.66328e+000,A8=-1.39335e+001,A10=-1.41459e+002,A12=1.98177e+003,A14=-6.76793e+003,A16=0.00000e+000,A18=0.00000e+000,A20=0.00000e+000
5:K=2.57480e+001,A4=-5.67041e-001,A6=3.50103e+000,A8=-7.37087e+001,A10=6.61022e+002,A12=-3.06695e+003,A14=7.48236e+003,A16=-5.34108e+003,A18=0.00000e+000,A20=0.00000e+000
6:K=1.47469e+001,A4=-2.42219e+000,A6=4.54251e+000,A8=-8.34777e+000,A10=2.10627e+001,A12=-2.47665e+001,A14=-1.77126e+001,A16=2.80048e+002,A18=0.00000e+000,A20=0.00000e+000
7:K=0.00000e+000,A3=0.00000e+000,A4=-2.32258e+000,A5=0.00000e+000,A6=-9.94904e-002,A7=0.00000e+000,A8=1.39208e+000,A9=0.00000e+000,A10=-5.49251e+000,A11=0.00000e+000,A12=1.75696e+001,A13=0.00000e+000,A14=1.68105e+001,A15=0.00000e+000,A16=-2.20728e+002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000
8:K=-3.17164e+000,A3=0.00000e+000,A4=-6.19251e-001,A5=0.00000e+000,A6=5.71808e-001,A7=0.00000e+000,A8=-4.79541e-001,A9=0.00000e+000,A10=8.99498e-002,A11=0.00000e+000,A12=2.71691e-001,A13=0.00000e+000,A14=-2.66729e-001,A15=0.00000e+000,A16=7.81994e-002,A17=0.00000e+000,A18=0.00000e+000,A19=0.00000e+000,A20=0.00000e+000

  FL       1.901mm
 Fno       2.780
   w       34.73゜
Ymax       1.295mm
  BF       0.610mm
  TL       2.407mm

 Elem   Surfs   　Focal Length
   1     3- 4       1.721mm
   2     5- 6      -33.140mm
   3     7- 8      -5.312mm
[Table 13]
[Example 13]
Reference Wave Length = 587.56 nm

SURF DATA
NUM. R d nd vd
OBJ INFINITY 350.0000
1 1e + 018 0.0500
STO 1e + 018 -0.0629
3 * 0.8033 0.3640 1.58313 59.44
4 * 3.3547 0.2000
5 * -2.3040 0.3997 1.58313 59.44
6 * -2.7830 0.1222
7 * 3.0976 0.7111 1.69895 30.04
8 * 1.5292 0.1655
9 1e + 018 0.2100 1.51633 64.14
10 1e + 018 0.2349
IMG INFINITY

ASPHERICAL SURFACE
3: K = -1.10538e + 001, A3 = -5.34071e-002, A4 = 3.22509e + 000, A5 = -3.34795e + 000, A6 = -5.81095e + 000, A7 = 0.00000e + 000, A8 = -9.80495e + 000, A9 = 0.00000e + 000, A10 = 9.51223e + 002, A11 = 0.00000e + 000, A12 = -7.89805e + 003, A13 = 0.00000e + 000, A14 = 2.06845e + 004, A15 = 0.00000e + 000, A16 = 0.00000e + 000, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
4: K = 1.96543e + 001, A4 = -1.89880e-001, A6 = 1.66328e + 000, A8 = -1.39335e + 001, A10 = -1.41459e + 002, A12 = 1.98177e + 003, A14 =- 6.76793e + 003, A16 = 0.00000e + 000, A18 = 0.00000e + 000, A20 = 0.00000e + 000
5: K = 2.57480e + 001, A4 = -5.67041e-001, A6 = 3.50103e + 000, A8 = -7.37087e + 001, A10 = 6.61022e + 002, A12 = -3.06695e + 003, A14 = 7.48236 e + 003, A16 = -5.34108e + 003, A18 = 0.00000e + 000, A20 = 0.00000e + 000
6: K = 1.47469e + 001, A4 = -2.42219e + 000, A6 = 4.54251e + 000, A8 = -8.34777e + 000, A10 = 2.10627e + 001, A12 = -2.47665e + 001, A14 =- 1.77126e + 001, A16 = 2.80048e + 002, A18 = 0.00000e + 000, A20 = 0.00000e + 000
7: K = 0.00000e + 000, A3 = 0.00000e + 000, A4 = -2.32258e + 000, A5 = 0.00000e + 000, A6 = -9.94904e-002, A7 = 0.00000e + 000, A8 = 1.39208e + 000, A9 = 0.00000e + 000, A10 = -5.49251e + 000, A11 = 0.00000e + 000, A12 = 1.75696e + 001, A13 = 0.00000e + 000, A14 = 1.68105e + 001, A15 = 0.00000e + 000, A16 = -2.20728e + 002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000
8: K = -3.17164e + 000, A3 = 0.00000e + 000, A4 = -6.19251e-001, A5 = 0.00000e + 000, A6 = 5.71808e-001, A7 = 0.00000e + 000, A8 = -4.79541 e-001, A9 = 0.00000e + 000, A10 = 8.99498e-002, A11 = 0.00000e + 000, A12 = 2.71691e-001, A13 = 0.00000e + 000, A14 = -2.66729e-001, A15 = 0.00000 e + 000, A16 = 7.81994e-002, A17 = 0.00000e + 000, A18 = 0.00000e + 000, A19 = 0.00000e + 000, A20 = 0.00000e + 000

FL 1.901mm
Fno 2.780
w 34.73 °
Ymax 1.295mm
BF 0.610mm
TL 2.407mm

Elem Surfs Focal Length
1 3- 4 1.721mm
2 5- 6 -33.140mm
3 7-8 -5.312mm
　図３０は実施例１３の収差図（球面収差（ａ）、非点収差（ｂ）、歪曲収差（ｃ））である。 FIG. 30 is an aberration diagram of Example 13 (spherical aberration (a), astigmatism (b), distortion (c)).
　各条件式に対応する実施例の値を表１４にまとめて示す。 Table 14 summarizes the values of the examples corresponding to each conditional expression.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　また、本発明は、明細書に記載の実施例に限定されるものではなく、他の実施例・変形例を含むことは、本明細書に記載された実施例や技術思想から本分野の当業者にとって明らかである。例えば、実質的に屈折力を持たないダミーレンズを更に付与した場合でも本発明の適用範囲内である。 In addition, the present invention is not limited to the embodiments described in the specification, and other embodiments and modifications are included in the present field from the embodiments and technical ideas described in the present specification. It is clear to the contractor. For example, even when a dummy lens having substantially no refractive power is further provided, it is within the scope of application of the present invention.
Ｂ　操作ボタン
Ｄ１，Ｄ２　表示画面
Ｌ１　第１レンズ
Ｌ２　第２レンズ
Ｌ３　第３レンズ
ＬＮ　撮像レンズ
ＬＵ　撮像装置
Ａｐｅ　開口絞り
ＩＭ　イメージセンサ
ＩＭａ　光電変換部
Ｔ　携帯電話機 B Operation buttons D1 and D2 Display screen L1 First lens L2 Second lens L3 Third lens LN Imaging lens LU Imaging device Ape Aperture stop IM Image sensor IMa Photoelectric conversion unit T Mobile phone

Claims (13)

  1. 　固体撮像素子に対して被写体像を結像させる撮像レンズにおいて、物体側から順に開口絞り、物体側に凸面を備え正の屈折力を有する第１レンズ、第２レンズ、負の屈折力を有する第３レンズから成り、以下の条件式を満足することを特徴とする撮像レンズ。
    　０．９＜ｆ１／ｆ＜１．５　　　　（１）
    　－３＜ｒ２／ｒ３＜－０．２　　　（２）
    　－０．１＜（ｒ５＋ｒ６）／（ｒ５－ｒ６）＜３．０　　　（３）
    　０．１８＜ｄ１／ｆ＜０．５　　　（４）
    但し、
    ｆ１　：前記第１レンズの焦点距離
    ｆ　　：撮像レンズ全系の焦点距離
    ｒ２　：前記第１レンズ像側面の近軸曲率半径
    ｒ３　：前記第２レンズ物体側面の近軸曲率半径
    ｒ５　：前記第３レンズ物体側面の近軸曲率半径
    ｒ６　：前記第３レンズ像側面の近軸曲率半径
    ｄ１　：前記第１レンズ物体側面から像側面までの光軸上の距離     In an imaging lens for forming a subject image on a solid-state imaging device, an aperture stop in order from the object side, a first lens having a convex surface on the object side, a second lens having positive refractive power, and a first lens having negative refractive power An imaging lens comprising three lenses and satisfying the following conditional expression:
    0.9 <f1 / f <1.5 (1)
    -3 <r2 / r3 <-0.2 (2)
    -0.1 <(r5 + r6) / (r5-r6) <3.0 (3)
    0.18 <d1 / f <0.5 (4)
    However,
    f1: focal length of the first lens f: focal length r2 of the entire imaging lens system: paraxial radius of curvature r3 of the first lens image side surface: paraxial radius of curvature r5 of the second lens object side surface: third lens Paraxial curvature radius r6 of the object side surface: Paraxial curvature radius d1 of the third lens image side surface d1: Distance on the optical axis from the first lens object side surface to the image side surface
  2. 　前記第１レンズは物体側が凸面、像側が凹面の物凸メニスカス形状であることを特徴とする請求項１に記載の撮像レンズ。 The imaging lens according to claim 1, wherein the first lens has a convex meniscus shape having a convex surface on the object side and a concave surface on the image side.
  3. 　前記第２レンズは物体側が凹面であることを特徴とする請求項１又は２に記載の撮像レンズ。 The imaging lens according to claim 1 or 2, wherein the second lens has a concave surface on the object side.
  4. 　前記第２レンズは像側面が凸面であることを特徴とする請求項１～３のいずれか１項に記載の撮像レンズ。 The imaging lens according to any one of claims 1 to 3, wherein the second lens has a convex image side surface.
  5. 　前記第３レンズは像側面が凹面であることを特徴とする請求項１～４のいずれか１項に記載の撮像レンズ。 The imaging lens according to any one of claims 1 to 4, wherein the third lens has a concave image side surface.
  6. 　前記第３レンズは像側面が凹面でかつ周辺部に凸面を有することを特徴とする請求項１～５のいずれか１項に記載の撮像レンズ。 The imaging lens according to any one of claims 1 to 5, wherein the third lens has a concave image side surface and a convex surface in a peripheral portion.
  7. 　前記第２レンズは、以下の条件式を満足することを特徴とする請求項１～６のいずれか１項に記載の撮像レンズ。
    　０．５＜ｆ２／ｆ＜４．０　　　（５）
    但し、
    ｆ２　：前記第２レンズの焦点距離     The imaging lens according to any one of claims 1 to 6, wherein the second lens satisfies the following conditional expression.
    0.5 <f2 / f <4.0 (5)
    However,
    f2: focal length of the second lens
  8. 　前記第３レンズは、以下の条件式を満足することを特徴とする請求項１～７のいずれか１項に記載の撮像レンズ。
    　－１０＜ｆ３／ｆ＜－０．７　　　（６）
    但し、
    ｆ３：前記第３レンズの焦点距離     The imaging lens according to any one of claims 1 to 7, wherein the third lens satisfies the following conditional expression.
    −10 <f3 / f <−0.7 (6)
    However,
    f3: focal length of the third lens
  9. 　前記撮像レンズは、以下の条件式を満足することを特徴とする請求項１～８のいずれか１項に記載の撮像レンズ。
    　０．１＜｜ｆ１／ｆ２｜＜２．０　　　（７）
    但し、
    ｆ２　：前記第２レンズの焦点距離     The imaging lens according to any one of claims 1 to 8, wherein the imaging lens satisfies the following conditional expression.
    0.1 <| f1 / f2 | <2.0 (7)
    However,
    f2: focal length of the second lens
  10. 　前記撮像レンズは、以下の条件式を満足することを特徴とする請求項１～９のいずれか１項に記載の撮像レンズ。
    　０．３＜（ｄ１＋ｄ３＋ｄ５）／ＴＴＬ＜０．７　　　（８）
    但し、
    ｄ３　：前記第２レンズ物体側面から像側面までの光軸上の距離
    ｄ５　：前記第３レンズ物体側面から像側面までの光軸上の距離
    ＴＴＬ：前記第１レンズ物体側面から前記固体撮像素子の受光面までの光軸上の距離     The imaging lens according to any one of claims 1 to 9, wherein the imaging lens satisfies the following conditional expression.
    0.3 <(d1 + d3 + d5) / TTL <0.7 (8)
    However,
    d3: Distance on the optical axis from the second lens object side surface to the image side surface d5: Distance on the optical axis from the third lens object side surface to the image side surface TTL: From the first lens object side surface to the solid-state imaging device Distance on the optical axis to the light receiving surface
  11. 　前記第３レンズは、以下の条件式を満足することを特徴とする請求項１～１０のいずれか１項に記載の撮像レンズ。
    　１．５５＜ｎ３＜１．９０　　　（９）
    ｎ３　：前記第３レンズの屈折率     The imaging lens according to any one of claims 1 to 10, wherein the third lens satisfies the following conditional expression.
    1.55 <n3 <1.90 (9)
    n3: refractive index of the third lens
  12. 　実質的に屈折力を有しないレンズを有することを特徴とする請求項１～１１のいずれか１項に記載の撮像レンズ。 The imaging lens according to any one of claims 1 to 11, further comprising a lens having substantially no refractive power.
  13. 　請求項１～１２のいずれか１項に記載の撮像レンズを有することを特徴とする撮像装置。 An imaging apparatus comprising the imaging lens according to any one of claims 1 to 12.
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