WO2014203720A1 - 撮像レンズ及び撮像装置 - Google Patents
撮像レンズ及び撮像装置 Download PDFInfo
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- WO2014203720A1 WO2014203720A1 PCT/JP2014/064683 JP2014064683W WO2014203720A1 WO 2014203720 A1 WO2014203720 A1 WO 2014203720A1 JP 2014064683 W JP2014064683 W JP 2014064683W WO 2014203720 A1 WO2014203720 A1 WO 2014203720A1
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- conditional expression
- imaging lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
Definitions
- the present invention relates to an imaging lens suitable for an imaging device using a solid-state imaging device, and an imaging device using the imaging lens.
- the most object side lens is often a glass lens having environmental resistance and high optical performance.
- a spherical lens is used from the viewpoint of ease.
- the most object-side lens must be an aspheric lens. .
- Patent Documents 1 and 2 disclose an imaging lens having a four-lens configuration in which an aspherical surface is used as the lens on the most object side and the image side surface is close to a flat surface.
- the imaging lens described in Patent Document 1 has a sufficiently wide angle.
- the imaging lens of Patent Document 2 lacks both wide angle and low profile because the refractive power of the second lens is weak.
- Patent Document 3 discloses an imaging lens having a meniscus shape in which the most object side lens has a convex surface facing the object side, but both the wide angle and the low profile are insufficient.
- the present invention has been made in view of such problems, and has a four-lens imaging lens capable of achieving a wide angle and a low profile as compared with a conventional type, while ensuring low cost and optical performance, And it aims at providing the imaging device using the same.
- an imaging lens reflecting one aspect of the present invention includes a first lens having a negative refractive power and a second lens having a negative refractive power in order from the object side.
- the third lens and the fourth lens, the object side surface of the first lens is aspherical, and satisfies the following conditional expression.
- f2 Focal length (mm) of the second lens
- f1 Focal length of the entire system (mm)
- r1 curvature radius (mm) of the side surface of the first lens object
- r2 radius of curvature (mm) of the side surface of the first lens image
- the principal point position of the entire system can be moved toward the image side, so that a wider angle can be obtained.
- the object side surface of the first lens an aspherical surface, different refractive powers can be given to the vicinity of the center and the periphery of the first lens, and appropriate aberration correction can be performed for the axial light beam and the peripheral light beam, respectively.
- the shape of the first lens that satisfies the conditional expression (2) is a meniscus lens having a gentle convex surface facing the object side from a biconcave shape with a gentle radius of curvature of the object side surface compared to the image side surface. If it is a spherical shape, light with an angle of view of 180 ° or more cannot be incident in the case of a flat or concave shape, and light with an angle of view exceeding 180 ° is not incident on the object side surface of the first lens in the case of a loosely convex shape. On the other hand, it is incident with a large incident angle, and a large aberration is generated. Therefore, in this imaging lens, the side surface of the first lens object is aspherical and the peripheral part is convex so that light with a large angle of view can be incident at a small incident angle. The generation can be kept small.
- conditional expression (1) if the value of conditional expression (1) exceeds the lower limit, the negative refractive power of the second lens is strengthened, so that the principal point position can be brought closer to the image plane, which is advantageous for widening the angle. .
- the value of conditional expression (1) when the value of conditional expression (1) is less than the upper limit, it is possible to prevent occurrence of spherical aberration and coma aberration and increase in error sensitivity due to the negative refractive power of the second lens becoming too strong.
- this imaging lens desirably satisfies the following conditional expression (1 ′). ⁇ 2.3 ⁇ f2 / f ⁇ 1.0 (1 ′)
- conditional expression (2) when the value of conditional expression (2) exceeds the lower limit, the first lens becomes a biconcave lens having a radius of curvature of the object side larger than that of the image side, so that the principal point position of the first lens is closer to the image side. This is advantageous for widening the angle.
- the value of the conditional expression (2) is less than the upper limit, a meniscus lens having a gentle convex surface directed toward the first lens object side surface is obtained, so that the first lens does not protrude toward the object side, which is advantageous in reducing the height.
- this imaging lens desirably satisfies the following conditional expression (2 ′). 0.5 ⁇ (r1 + r2) / (r1-r2) ⁇ 1.8 (2 ′)
- This imaging apparatus includes the above-described imaging lens.
- the present invention it is possible to provide a four-lens imaging lens capable of achieving a wide angle and a low profile as compared with a conventional type while ensuring low cost and optical performance, and an imaging apparatus using the imaging lens. it can.
- FIG. 1 is a cross-sectional view of an imaging lens according to Example 1.
- FIG. FIG. 6 shows spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 1.
- FIG. FIG. 6 is an aberration diagram of meridional coma aberrations (a) and (b) according to Example 1; 6 is a cross-sectional view of an imaging lens according to Example 2.
- FIG. FIG. 6 shows spherical aberration (a), astigmatism (b), and distortion (c)) of the imaging lens according to Example 2.
- FIG. 6 is an aberration diagram of meridional coma aberrations (a) and (b) according to Example 2; 6 is a cross-sectional view of an imaging lens according to Example 3.
- FIG. FIG. 6 shows spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 3.
- FIG. FIG. 6 is an aberration diagram of meridional coma aberrations (a) and (b) according to Example 3; 6 is a cross-sectional view of an imaging lens according to Example 4.
- FIG. FIG. 6 shows spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 4.
- FIG. 6 is an aberration diagram of meridional coma aberrations (a) and (b) according to Example 4; 6 is a cross-sectional view of an imaging lens according to Example 5.
- FIG. FIG. 6 shows spherical aberration (a), astigmatism (b), and distortion (c)) of the imaging lens according to Example 5.
- FIG. FIG. 6 is an aberration diagram of meridional coma aberrations (a) and (b) according to Example 5; 6 is a cross-sectional view of an imaging lens according to Example 6.
- FIG. FIG. 6 shows spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 6.
- FIG. 6 is an aberration diagram of meridional coma aberrations (a) and (b) according to Example 6; 10 is a cross-sectional view of an imaging lens according to Example 7.
- FIG. FIG. 10 shows spherical aberration (a), astigmatism (b), and distortion (c) of the imaging lens according to Example 7.
- FIG. 10 is an aberration diagram of meridional coma aberrations (a) and (b) according to Example 7;
- FIG. 2 is a perspective view of the in-vehicle camera 1 using the imaging apparatus according to the present embodiment.
- the imaging device of the in-vehicle camera 1 includes a CMOS image sensor IM and an imaging lens LN that captures a subject image on a photoelectric conversion unit (light receiving surface) of the image sensor IM.
- An image signal output from the CMOS image sensor IM is output to an in-vehicle computer (not shown) via the cable 2.
- the imaging lens LN includes a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens, and a fourth lens in order from the object side, and the object side surface of the first lens has an aspherical shape.
- the following conditional expression is satisfied. -2.8 ⁇ f2 / f ⁇ -0.5 (1) 0.0 ⁇ (r1 + r2) / (r1-r2) ⁇ 2.3 (2)
- f2 focal length of the second lens (mm)
- r1 radius of curvature of the first lens object side surface (mm)
- r2 radius of curvature of the first lens image side surface (mm)
- the third lens and the fourth lens have positive refractive power.
- the third lens and the fourth lens positive lenses, the first lens and the second lens having negative refractive power are added, and the entire system becomes a retrofocus type, which is advantageous for widening the angle.
- a strong positive refractive power is required, but since the positive refractive power can be shared by the third lens and the fourth lens, the refractive power of one lens becomes too strong. Therefore, an increase in error sensitivity and occurrence of aberration can be suppressed.
- the periphery of the object side surface of the first lens has a positive refractive power. Since the peripheral portion of the side surface of the first lens object has a positive refractive power, light can be incident from an angle of view of 180 ° or more, so that a wide angle of view of 180 ° or more can be achieved.
- the first lens has a concave surface facing the image side
- the second lens has a concave surface facing the image side
- the third lens has a convex surface facing the object side
- the fourth lens has a convex surface facing the image side.
- the material of the first lens satisfies the following conditional expression. 40 ⁇ 1 ⁇ 70 (3) Where ⁇ 1: Abbe number of the first lens
- conditional expression (3) When the value of conditional expression (3) exceeds the lower limit, chromatic aberration generated in the first lens can be suppressed to a small value, so that high performance is facilitated. Moreover, when the value of conditional expression (3) is less than the upper limit, it can be made of a readily available material, which is advantageous for cost reduction. Further, it is possible to prevent the occurrence of chromatic aberration from becoming excessively small and causing the balance with chromatic aberration correction of other lenses to be over-corrected. Desirably, the following expression (3 ′) is satisfied. 50 ⁇ 1 ⁇ 65 (3 ′)
- the first lens is preferably made of a plastic material. By making the first lens a plastic lens, its optical surface can be easily aspherical, which is advantageous for cost reduction.
- an aperture stop between the third lens and the fourth lens.
- the effective diameters of the third lens and the fourth lens can be kept small, so that a strong positive refractive power is exerted on the third lens and the fourth lens. Even if it is provided, higher-order aberrations can be kept small.
- the axial ray height is increased, and the contribution of the refractive power of the third lens and the fourth lens to the total focal length is increased. This is advantageous for widening the angle.
- FIG. 1 is an exaggerated view showing an example of the object side surface S1 of the first lens.
- the surface angle ⁇ 1 (°) that is the maximum of the surface angles formed by intersecting the object side surface S1 of the first lens with respect to the perpendicular of the optical axis OA is obtained at the position P1
- the distance to the position P1 is reached.
- the conditional expression (4) is satisfied.
- this imaging lens desirably satisfies the following conditional expression (4 ′). ⁇ 1> ⁇ 2 ⁇ 10 (4 ′)
- the imaging lens preferably satisfies the following conditional expression. -0.06 ⁇ f / r1 ⁇ 0.06 (5)
- the surface becomes a plane close to a plane.
- the value of conditional expression (5) is less than the upper limit, the convex shape of the side surface of the first lens object does not become too strong, the occurrence of spherical aberration does not increase, and at the same time, the principal point position of the first lens is imaged with respect to the lens. Since it is not close to the side, it can promote a low profile.
- conditional expression (5) when the value of conditional expression (5) exceeds the lower limit, the concave shape on the side surface of the first lens object does not become too strong, and a light having a large angle of view exceeding 180 ° can be incident on the lens, thereby widening the angle. .
- this imaging lens desirably satisfies the following conditional expression (5 ′). ⁇ 0.04 ⁇ f / r1 ⁇ 0.04 (5 ′)
- the imaging lens preferably satisfies the following conditional expression. 1.8 ⁇ f3 / f ⁇ 4.3 (6)
- f3 focal length of the third lens (mm)
- conditional expression (6) When the value of conditional expression (6) exceeds the lower limit, the positive refractive power of the third lens does not become too strong, so that the occurrence of spherical aberration and coma can be kept small. Further, when the value of conditional expression (6) is less than the upper limit, the third lens has a strong positive refractive power, so that the principal point position of the entire system is closer to the image side, making it easier to reduce the focal length and widening the angle. Become advantageous. In addition, it is possible to correct chromatic aberration generated in the first lens and the second lens. Furthermore, the imaging lens desirably satisfies the following conditional expression (6 ′). 2.0 ⁇ f3 / f ⁇ 4.0 (6 ′)
- the imaging lens preferably satisfies the following conditional expression. ⁇ 30.0 ⁇ fl / f ⁇ 6.0 (7) However, f1: Focal length of the first lens (mm)
- conditional expression (7) When the value of conditional expression (7) exceeds the lower limit, the first lens has a weak refractive power, so that it is possible to suppress the occurrence of spherical aberration and coma that are a concern when the refractive power is too strong. Further, when the value of conditional expression (7) is below the upper limit, the first lens has a negative refractive power, which contributes to shortening the focal length of the entire system and is advantageous for widening the angle. Furthermore, the imaging lens desirably satisfies the following conditional expression (7 ′). -20.0 ⁇ fl / f ⁇ -7.0 (7 ')
- the imaging lens preferably satisfies the following conditional expression. 2.0 ⁇ f34 / f ⁇ 4.0 (8) However, f34: Composite focal length of the third lens and the fourth lens (mm)
- Conditional expression (8) defines a preferable range of the combined focal length of the third lens and the fourth lens.
- the value of conditional expression (8) exceeds the lower limit, the combined refractive power of the third lens and the fourth lens does not become too strong with respect to the focal length of the entire system, so that the occurrence of spherical aberration and coma aberration can be suppressed. it can.
- the value of conditional expression (8) is less than the upper limit, the positive refractive power becomes strong at a position close to the image plane, so that it is easy to shorten the focal point, which is advantageous for widening the angle.
- the imaging lens desirably satisfies the following conditional expression (8 ′). 2.5 ⁇ f34 / f ⁇ 3.5 (8 ′)
- the imaging lens preferably satisfies the following conditional expression. ⁇ 1.0 ⁇ (r5 + r6) / (r5 ⁇ r6) ⁇ 0.2 (9)
- r5 radius of curvature (mm) of the side surface of the third lens object
- r6 radius of curvature (mm) of the side surface of the third lens image
- Conditional expression (9) defines a preferable shape of the third lens.
- the third lens becomes a convex lens with a loose image side surface.
- the strong positive refractive power of the third lens is increased between the convex surface on the object side and the image side. Since the refractive power of the convex surface on the object side becomes too strong, the occurrence of spherical aberration and coma aberration can be avoided.
- the convex surface of the third lens image side surface does not become too strong, the incident angle of the light of the peripheral image height to the third lens image side surface does not become too large, and coma aberration is reduced. The increase can be suppressed.
- the imaging lens desirably satisfies the following conditional expression (9 ′). ⁇ 0.8 ⁇ (r5 + r6) / (r5-r6) ⁇ 0.3 (9 ′)
- the imaging lens preferably satisfies the following conditional expression. 0.8 ⁇ f3 / f4 ⁇ 2.0 (10) However, f3: Focal length (mm) of the third lens f4: Focal length (mm) of the fourth lens
- conditional expression (10) defines a preferable range of the ratio of the focal lengths of the third lens and the fourth lens.
- conditional expression (10) the balance between the refractive power of the third lens and the refractive power of the fourth lens becomes good, and both wide angle and aberration correction can be achieved.
- the imaging lens desirably satisfies the following conditional expression (10 ′). 1.0 ⁇ f3 / f4 ⁇ 1.8 (10 ′)
- the image side surface of the second lens is an aspherical surface. This makes it possible to provide different powers near and in the vicinity of the center of the second lens image side surface within the effective diameter, so that aberration correction is advantageous.
- the imaging lens may have a lens that does not substantially have refractive power.
- the image point is the air conversion length of the cover glass.
- 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 eff.diameter: Effective diameter
- 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 h, and is expressed by the following “Equation 1”.
- a power of 10 for example, 2.5 ⁇ 10 ⁇ 02
- 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 effective 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.
- 3 is a sectional view of the lens of Example 1.
- the imaging lens of Example 1 includes, in order from the object side, a first lens L1 having a negative refractive power, a second lens L2 having a negative refractive power, a third lens L3 having a positive refractive power, an aperture stop S,
- the fourth lens L4 has a positive refractive power
- the object side surface of the first lens L1 made of a plastic material has an aspherical shape
- the peripheral portion has a positive refractive power.
- the first lens L1 has a concave surface on the image side
- the second lens L2 has a concave surface on the image side
- the third lens L3 has a convex surface on the object side
- the fourth lens L4 has a convex surface on the image side.
- F is a parallel plate assuming a cover glass or an IR cut filter
- IM is an imaging surface of the solid-state imaging device.
- FIG. 4 is an aberration diagram of Example 1 (spherical aberration (a), astigmatism (b), distortion aberration (c)), and FIG. 5 is a meridional coma aberration (a), (b)).
- 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 ( same as below).
- Example 2 shows lens data in Example 2.
- 6 is a sectional view of the lens of Example 2.
- the imaging lens of Example 2 includes, in order from the object side, a first lens L1 having a negative refractive power, a second lens L2 having a negative refractive power, a third lens L3 having a positive refractive power, an aperture stop S,
- the fourth lens L4 has a positive refractive power
- the object side surface of the first lens L1 made of a plastic material has an aspherical shape
- the peripheral portion has a positive refractive power.
- the first lens L1 has a concave surface on the image side
- the second lens L2 has a concave surface on the image side
- the third lens L3 has a convex surface on the object side
- the fourth lens L4 has a convex surface on the image side.
- F is a parallel plate assuming a cover glass or an IR cut filter
- IM is an imaging surface of the solid-state imaging device.
- FIG. 7 is an aberration diagram of Example 2 (spherical aberration (a), astigmatism (b), distortion aberration (c)), and FIG. 8 is a meridional coma aberration (a), (b)). is there.
- 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, a first lens L1 having a negative refractive power, a second lens L2 having a negative refractive power, a third lens L3 having a positive refractive power, an aperture stop S,
- the fourth lens L4 has a positive refractive power
- the object side surface of the first lens L1 made of a plastic material has an aspherical shape, and the peripheral portion has a positive refractive power.
- the first lens L1 has a concave surface on the image side
- the second lens L2 has a concave surface on the image side
- the third lens L3 has a convex surface on the object side
- the fourth lens L4 has a convex surface on the image side.
- F is a parallel plate assuming a cover glass or 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 aberration (c)), and FIG. 11 is a meridional coma aberration (a), (b)). is there.
- Example 4 Table 4 shows lens data in Example 4. 12 is a sectional view of the lens of Example 4.
- the imaging lens of Example 4 includes, in order from the object side, a first lens L1 having negative refractive power, a second lens L2 having negative refractive power, a third lens L3 having positive refractive power, an aperture stop S,
- the fourth lens L4 has a positive refractive power
- the object side surface of the first lens L1 made of a plastic material has an aspherical shape
- the peripheral portion has a positive refractive power.
- the first lens L1 has a concave surface on the image side
- the second lens L2 has a concave surface on the image side
- the third lens L3 has a convex surface on the object side
- the fourth lens L4 has a convex surface on the image side.
- F is a parallel plate assuming a cover glass or an IR cut filter
- IM is an imaging surface of the solid-state imaging device.
- FIG. 13 is an aberration diagram of Example 4 (spherical aberration (a), astigmatism (b), distortion aberration (c)), and FIG. 14 is a meridional coma aberration (a), (b)). is there.
- Example 5 shows lens data in Example 5.
- FIG. 15 is a sectional view of the lens of Example 5.
- the imaging lens of Example 5 includes, in order from the object side, a first lens L1 having negative refractive power, a second lens L2 having negative refractive power, a third lens L3 having positive refractive power, an aperture stop S,
- the fourth lens L4 has a positive refractive power
- the object side surface of the first lens L1 made of a plastic material has an aspherical shape
- the peripheral portion has a positive refractive power.
- the first lens L1 has a concave surface on the image side
- the second lens L2 has a concave surface on the image side
- the third lens L3 has a convex surface on the object side
- the fourth lens L4 has a convex surface on the image side.
- F is a parallel plate assuming a cover glass or an IR cut filter
- IM is an imaging surface of the solid-state imaging device.
- FIG. 16 is an aberration diagram of Example 5 (spherical aberration (a), astigmatism (b), distortion aberration (c)), and FIG. 17 is a meridional coma aberration (a), (b)). is there.
- Example 6 shows lens data in Example 6.
- FIG. 18 is a sectional view of the lens of Example 6.
- the imaging lens of Example 6 includes, in order from the object side, a first lens L1 having a negative refractive power, a second lens L2 having a negative refractive power, a third lens L3 having a positive refractive power, an aperture stop S,
- the fourth lens L4 has a positive refractive power
- the object side surface of the first lens L1 made of a plastic material has an aspherical shape
- the peripheral portion has a positive refractive power.
- the first lens L1 has a concave surface on the image side
- the second lens L2 has a concave surface on the image side
- the third lens L3 has a convex surface on the object side
- the fourth lens L4 has a convex surface on the image side.
- F is a parallel plate assuming a cover glass or an IR cut filter
- IM is an imaging surface of the solid-state imaging device.
- FIG. 19 is an aberration diagram of Example 6 (spherical aberration (a), astigmatism (b), distortion aberration (c)), and FIG. 20 is a meridional coma aberration (a), (b)). is there.
- Example 7 shows lens data in Example 7.
- FIG. 21 is a sectional view of the lens of Example 7.
- the imaging lens of Example 7 includes, in order from the object side, a first lens L1 having negative refractive power, a second lens L2 having negative refractive power, a third lens L3 having positive refractive power, an aperture stop S,
- the fourth lens L4 has a positive refractive power
- the object side surface of the first lens L1 made of a plastic material has an aspherical shape, and the peripheral portion has a positive refractive power.
- the first lens L1 has a concave surface on the image side
- the second lens L2 has a concave surface on the image side
- the third lens L3 has a convex surface on the object side
- the fourth lens L4 has a convex surface on the image side.
- F is a parallel plate assuming a cover glass or an IR cut filter
- IM is an imaging surface of the solid-state imaging device.
- Example 7 is an aberration diagram of Example 7 (spherical aberration (a), astigmatism (b), distortion aberration (c)), and FIG. 23 is a meridional coma aberration (a), (b)). is there.
- Table 8 summarizes the values of the examples corresponding to each conditional expression.
- the present invention is not limited to the embodiments and examples described in the specification, and includes other examples and modifications, and includes the embodiments, examples, and techniques described in the present specification. It will be apparent to those skilled in the art from the idea. 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.
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Abstract
Description
-2.8<f2/f<-0.5 (1)
0.0<(r1+r2)/(r1-r2)<2.3 (2)
但し、
f2:前記第2レンズの焦点距離(mm)
f:全系の焦点距離(mm)
r1:前記第1レンズ物体側面の曲率半径(mm)
r2:前記第1レンズ像側面の曲率半径(mm)
-2.3<f2/f<-1.0 (1’)
0.5<(r1+r2)/(r1-r2)<1.8 (2’)
-2.8<f2/f<-0.5 (1)
0.0<(r1+r2)/(r1-r2)<2.3 (2)
但し、
f2:第2レンズの焦点距離(mm)
f:全系の焦点距離(mm)
r1:第1レンズ物体側面の曲率半径(mm)
r2:第1レンズ像側面の曲率半径(mm)
40<ν1<70 (3)
但し
ν1:第1レンズのアッベ数
50<ν1<65 (3’)
θ1>θ2×6 (4)
θ1>θ2×10 (4’)
-0.06<f/r1<0.06 (5)
-0.04<f/r1<0.04 (5’)
1.8<f3/f<4.3 (6)
但し、
f3:第3レンズの焦点距離(mm)
2.0<f3/f<4.0 (6’)
-30.0<fl/f<-6.0 (7)
但し、
f1:第1レンズの焦点距離(mm)
-20.0<fl/f<-7.0 (7’)
2.0<f34/f<4.0 (8)
但し、
f34:第3レンズと第4レンズの合成焦点距離(mm)
2.5<f34/f<3.5 (8’)
-1.0≦(r5+r6)/(r5-r6)<-0.2 (9)
但し、
r5:前記第3レンズ物体側面の曲率半径(mm)
r6:前記第3レンズ像側面の曲率半径(mm)
-0.8<(r5+r6)/(r5-r6)<-0.3 (9’)
0.8<f3/f4<2.0 (10)
但し、
f3:前記第3レンズの焦点距離(mm)
f4:前記第4レンズの焦点距離(mm)
1.0<f3/f4<1.8 (10’)
次に、上述した実施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、カバーガラスを空気換算長とした場合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。またカバーガラスは空気換算長とする。)
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
eff.diameter:有効径
実施例1におけるレンズデータを表1に示す。図3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、負の屈折力を有する第1レンズL1、負の屈折力を有する第2レンズL2、正の屈折力を有する第3レンズL3、開口絞りS、正の屈折力を有する第4レンズL4からなり、プラスチック材料からなる第1レンズL1の物体側面は非球面形状であって、周辺部が正の屈折力を有する。第1レンズL1は像側に凹面を向け、第2レンズL2は像側に凹面を向け、第3レンズL3は物体側に凸面を向け、第4レンズL4は像側に凸面を向けている。Fはカバーガラス又はIRカットフィルタを想定した平行平板であり、IMは固体撮像素子の撮像面である。
[実施例1]
Reference Wave Length = 587.56 nm
unit: mm
面番号 r d nd vd eff.diameter
1* 1e+018 0.8000 1.54470 55.99 12.968
2* 5.7049 2.3699 6.891
3* 3.6648 1.0101 1.54470 55.99 5.808
4* 0.7497 0.6532 3.912
5* 2.1522 1.6597 1.63469 23.86 3.763
6* -5.5145 0.7689 2.859
STO INFINITY 0.8498 1.201
8* 5.5351 1.3217 1.54470 56.00 2.889
9* -1.4688 0.5000 3.054
10 INFINITY 0.3000 1.56400 47.00 3.329
11 INFINITY 1.5397 3.375
面番号:非球面係数
1 :K=0.00000e+000,A4=6.96143e-004,A6=-3.86461e-006,A8=-1.06354e-007,A10=1.41062e-009
2 :K=0.00000e+000,A4=-3.12737e-004,A6=6.88601e-004,A8=-7.82132e-005,A10=4.60432e-006
3 :K=-5.00000e+001,A4=-1.90113e-002,A6=2.15327e-003,A8=-1.20466e-004,A10=2.87551e-006
4 :K=-1.94492e+000,A4=1.01466e-002,A6=-6.21379e-004,A8=-2.54781e-003,A10=4.05222e-004
5 :K=0.00000e+000,A4=-4.33199e-002,A6=2.85933e-002,A8=-9.67521e-003,A10=1.15315e-003
6 :K=0.00000e+000,A4=2.07964e-002,A6=2.48808e-002,A8=-2.56711e-002,A10=1.32981e-002,A12=-2.25096e-003
8 :K=0.00000e+000,A4=-2.18040e-002,A6=6.65018e-003,A8=1.69852e-003,A10=1.88678e-004
9 :K=-2.13847e+000,A4=-2.72322e-002,A6=1.44832e-002,A8=-9.54128e-003,A10=3.48938e-003
FL 1.173
Fno 2.00
w 187.00
Ymax 1.931
BF 2.232
TL 11.665
Elem Surfs Focal Length Diameter
1 1- 2 -10.4735 12.968
2 3- 4 -1.9710 5.808
3 5- 6 2.6628 3.763
4 8- 9 2.2830 3.054
実施例2におけるレンズデータを表2に示す。図6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、負の屈折力を有する第1レンズL1、負の屈折力を有する第2レンズL2、正の屈折力を有する第3レンズL3、開口絞りS、正の屈折力を有する第4レンズL4からなり、プラスチック材料からなる第1レンズL1の物体側面は非球面形状であって、周辺部が正の屈折力を有する。第1レンズL1は像側に凹面を向け、第2レンズL2は像側に凹面を向け、第3レンズL3は物体側に凸面を向け、第4レンズL4は像側に凸面を向けている。Fはカバーガラス又はIRカットフィルタを想定した平行平板であり、IMは固体撮像素子の撮像面である。
[実施例2]
Reference Wave Length = 587.56 nm
unit: mm
面番号 r d nd vd eff.diameter
1* 1e+018 0.8000 1.54470 55.99 12.665
2* 4.5554 2.3208 6.646
3* 3.5404 0.9325 1.54470 55.99 5.680
4* 0.7386 0.6815 3.481
5* 1.9061 1.3063 1.63469 23.86 3.294
6* -8.0154 0.7780 2.715
STO INFINITY 0.7171 1.219
8* 4.3032 1.4616 1.54470 56.00 2.663
9* -1.5587 1.7358 3.164
10 INFINITY 0.3000 1.56400 47.00 3.754
11 INFINITY 0.2919 3.798
面番号:非球面係数
1 :K=0.00000e+000,A4=7.76977e-004,A6=-2.79927e-006,A8=-1.18676e-007,A10=8.50507e-010
2 :K=0.00000e+000,A4=-1.29350e-003,A6=9.46875e-004,A8=-1.28640e-004,A10=7.58000e-006
3 :K=-3.11243e+001,A4=-2.07764e-002,A6=2.30146e-003,A8=-8.28633e-005,A10=-4.21018e-008
4 :K=-1.89093e+000,A4=5.99182e-002,A6=-9.18142e-003,A8=-7.34492e-003,A10=1.47135e-003
5 :K=0.00000e+000,A4=-2.72150e-002,A6=2.27525e-002,A8=-6.61266e-003,A10=-3.00618e-004
6 :K=0.00000e+000,A4=1.38298e-002,A6=3.82173e-002,A8=-3.04123e-002,A10=1.36523e-002,A12=-2.69843e-003
8 :K=0.00000e+000,A4=-3.56221e-002,A6=1.53074e-002,A8=-1.12135e-002,A10=2.16767e-003
9 :K=-2.00000e+000,A4=-2.07585e-002,A6=5.81866e-003,A8=-1.88585e-003,A10=-4.66717e-004
FL 1.163
Fno 2.00
w 187.00
Ymax 1.930
BF 2.219
TL 11.217
Elem Surfs Focal Length Diameter
1 1- 2 -8.3632 12.665
2 3- 4 -1.9411 5.680
3 5- 6 2.5569 3.294
4 8- 9 2.3032 3.164
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、負の屈折力を有する第1レンズL1、負の屈折力を有する第2レンズL2、正の屈折力を有する第3レンズL3、開口絞りS、正の屈折力を有する第4レンズL4からなり、プラスチック材料からなる第1レンズL1の物体側面は非球面形状であって、周辺部が正の屈折力を有する。第1レンズL1は像側に凹面を向け、第2レンズL2は像側に凹面を向け、第3レンズL3は物体側に凸面を向け、第4レンズL4は像側に凸面を向けている。Fはカバーガラス又はIRカットフィルタを想定した平行平板であり、IMは固体撮像素子の撮像面である。
[実施例3]
Reference Wave Length = 587.56 nm
unit: mm
面番号 r d nd vd eff.diameter
1* 235.6060 0.8000 1.54470 55.99 12.640
2* 5.7550 2.2146 6.885
3* 4.9447 1.0887 1.54470 55.99 6.071
4* 0.8385 0.5964 3.933
5* 2.0370 2.0692 1.63469 23.86 3.692
6* -14.7235 0.6396 2.233
STO INFINITY 0.6953 1.180
8* 6.9822 1.3724 1.54470 56.00 2.394
9* -1.3431 0.5282 2.887
10 INFINITY 0.3000 1.56400 47.00 3.647
11 INFINITY 1.6810 3.704
面番号:非球面係数
1 :K=0.00000e+000,A4=6.88972e-004,A6=-4.37326e-006,A8=-1.12963e-007,A10=1.69103e-009
2 :K=0.00000e+000,A4=2.24714e-003,A6=-2.29813e-005,A8=5.70701e-006,A10=9.54569e-007
3 :K=-4.97988e+001,A4=-1.76229e-002,A6=2.17815e-003,A8=-1.28225e-004,A10=2.83805e-006
4 :K=-1.97171e+000,A4=5.69974e-002,A6=-9.78951e-003,A8=-3.98929e-003,A10=7.27255e-004
5 :K=0.00000e+000,A4=-5.28533e-003,A6=1.73548e-002,A8=-7.83953e-003,A10=7.11921e-004
6 :K=0.00000e+000,A4=6.29023e-002,A6=7.75096e-003,A8=-3.29505e-002,A10=3.78436e-002,A12=-9.97977e-003
8 :K=0.00000e+000,A4=-5.58407e-002,A6=2.16291e-002,A8=-1.13394e-002,A10=3.17925e-003
9 :K=-2.00000e+000,A4=-5.71121e-002,A6=1.66570e-002,A8=-1.04868e-002,A10=2.06937e-003
FL 1.169
Fno 2.00
w 187.00
Ymax 1.925
BF 2.406
TL 11.882
Elem Surfs Focal Length Diameter
1 1- 2 -10.8433 12.640
2 3- 4 -2.0450 6.071
3 5- 6 2.9613 3.692
4 8- 9 2.1956 2.887
実施例4におけるレンズデータを表4に示す。図12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、負の屈折力を有する第1レンズL1、負の屈折力を有する第2レンズL2、正の屈折力を有する第3レンズL3、開口絞りS、正の屈折力を有する第4レンズL4からなり、プラスチック材料からなる第1レンズL1の物体側面は非球面形状であって、周辺部が正の屈折力を有する。第1レンズL1は像側に凹面を向け、第2レンズL2は像側に凹面を向け、第3レンズL3は物体側に凸面を向け、第4レンズL4は像側に凸面を向けている。Fはカバーガラス又はIRカットフィルタを想定した平行平板であり、IMは固体撮像素子の撮像面である。
[実施例4]
Reference Wave Length = 587.56 nm
unit: mm
面番号 r d nd vd eff.diameter
1* 1e+018 0.8000 1.54470 55.99 12.675
2* 5.4656 2.3691 6.776
3* 4.1783 1.0912 1.54470 55.99 5.890
4* 0.7827 0.8377 4.110
5* 2.0910 1.5847 1.58313 29.99 3.762
6* -4.3089 0.8535 3.079
STO INFINITY 0.9660 1.247
8* 6.1218 1.2418 1.54470 56.00 2.761
9* -1.5891 0.5700 2.976
10 INFINITY 0.3000 1.56400 47.00 3.285
11 INFINITY 1.4543 3.335
面番号:非球面係数
1 :K=0.00000e+000,A4=7.06954e-004,A6=-3.91178e-006,A8=-1.06635e-007,A10=1.42267e-009
2 :K=0.00000e+000,A4=1.39784e-004,A6=5.98393e-004,A8=-7.27836e-005,A10=4.73649e-006
3 :K=-5.00000e+001,A4=-1.97803e-002,A6=2.14957e-003,A8=-1.18330e-004,A10=2.89387e-006
4 :K=-1.94972e+000,A4=1.80934e-002,A6=-1.57153e-003,A8=-2.79339e-003,A10=3.95515e-004
5 :K=0.00000e+000,A4=-3.67029e-002,A6=2.60833e-002,A8=-8.70673e-003,A10=8.70457e-004
6 :K=0.00000e+000,A4=1.75289e-002,A6=3.10890e-002,A8=-2.88965e-002,A10=1.22878e-002,A12=-1.76066e-003
8 :K=0.00000e+000,A4=-2.15151e-002,A6=-1.13259e-003,A8=5.30843e-003,A10=-1.07517e-004
9 :K=-3.37734e+000,A4=-5.37472e-002,A6=2.65444e-002,A8=-1.44340e-002,A10=4.41219e-003
FL 1.174
Fno 2.00
w 187.00
Ymax 1.929
BF 2.216
TL 11.960
Elem Surfs Focal Length Diameter
1 1- 2 -10.0341 12.675
2 3- 4 -1.9940 5.890
3 5- 6 2.6565 3.762
4 8- 9 2.4556 2.976
実施例5におけるレンズデータを表5に示す。図15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、負の屈折力を有する第1レンズL1、負の屈折力を有する第2レンズL2、正の屈折力を有する第3レンズL3、開口絞りS、正の屈折力を有する第4レンズL4からなり、プラスチック材料からなる第1レンズL1の物体側面は非球面形状であって、周辺部が正の屈折力を有する。第1レンズL1は像側に凹面を向け、第2レンズL2は像側に凹面を向け、第3レンズL3は物体側に凸面を向け、第4レンズL4は像側に凸面を向けている。Fはカバーガラス又はIRカットフィルタを想定した平行平板であり、IMは固体撮像素子の撮像面である。
[実施例5]
Reference Wave Length = 587.56 nm
unit: mm
面番号 r d nd vd eff.diameter
1* -23.5910 0.8000 1.54470 55.99 10.908
2* 17.9564 1.3710 6.253
3* 9.2990 0.9000 1.53048 55.72 5.430
4* 0.8539 0.4896 3.137
5* 1.9088 1.1886 1.63200 23.40 2.827
6* -12.4254 0.4800 2.007
STO INFINITY 0.6073 0.949
8* 4.5251 1.5266 1.53048 55.72 2.322
9* -1.0937 0.5864 2.851
10 INFINITY 0.3000 1.56400 47.00 3.398
11 INFINITY 1.0739 3.467
面番号:非球面係数
1 :K=0.00000e+000,A4=1.69807e-003,A6=-1.35921e-005,A8=-4.74110e-008
2 :K=0.00000e+000,A4=1.04215e-002,A6=-1.42840e-003,A8=1.16066e-004
3 :K=-3.45700e+001,A4=-1.86085e-002,A6=1.71112e-003,A8=-1.31118e-005,A10=-2.56407e-006
4 :K=-1.71331e+000,A4=8.97956e-002,A6=-3.42153e-002,A8=-1.32515e-002,A10=4.55224e-003
5 :K=0.00000e+000,A4=2.28289e-002,A6=1.13156e-002,A8=-1.46609e-003,A10=-8.82522e-004
6 :K=0.00000e+000,A4=6.38174e-002,A6=7.27780e-002,A8=-1.00851e-001,A10=1.17584e-001,A12=-4.93281e-002
8 :K=0.00000e+000,A4=-7.84940e-002,A6=3.32129e-002,A8=-8.23504e-003,A10=1.45015e-003
9 :K=-2.00000e+000,A4=-6.72534e-002,A6=2.50816e-002,A8=-1.84000e-002,A10=4.92548e-003
FL 1.170
Fno 2.00
w 187.00
Ymax 1.919
BF 1.852
TL 9.215
Elem Surfs Focal Length Diameter
1 1- 2 -18.5920 10.908
2 3- 4 -1.8404 5.430
3 5- 6 2.7049 2.827
4 8- 9 1.8330 2.851
実施例6におけるレンズデータを表6に示す。図18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、負の屈折力を有する第1レンズL1、負の屈折力を有する第2レンズL2、正の屈折力を有する第3レンズL3、開口絞りS、正の屈折力を有する第4レンズL4からなり、プラスチック材料からなる第1レンズL1の物体側面は非球面形状であって、周辺部が正の屈折力を有する。第1レンズL1は像側に凹面を向け、第2レンズL2は像側に凹面を向け、第3レンズL3は物体側に凸面を向け、第4レンズL4は像側に凸面を向けている。Fはカバーガラス又はIRカットフィルタを想定した平行平板であり、IMは固体撮像素子の撮像面である。
[実施例6]
Reference Wave Length = 587.56 nm
unit: mm
面番号 r d nd vd eff.diameter
1* 20.9758 0.8000 1.54470 56.00 12.863
2* 5.1309 2.4914 6.881
3* 11.7626 0.9598 1.53048 55.72 6.060
4* 0.9567 0.5476 3.850
5* 1.9171 1.9410 1.63200 23.40 3.510
6* -18.8610 0.4800 2.061
STO INFINITY 0.6132 0.795
8* 4.2820 1.5334 1.53048 55.72 2.151
9* -0.9600 0.5241 2.751
10 INFINITY 0.3000 1.56400 47.00 3.385
11 INFINITY 0.8760 3.465
面番号:非球面係数
1 :K=0.00000e+000,A4=-6.58293e-005,A6=1.72741e-006,A8=2.99117e-009,A10=-4.78507e-010,A12=4.90978e-012
2 :K=0.00000e+000,A4=4.41305e-003,A6=-1.33075e-003,A8=3.10218e-004,A10=-2.28327e-005,A12=5.84599e-007
3 :K=-3.28381e+001,A4=-6.93633e-003,A6=1.13291e-004,A8=5.40339e-005,A10=-3.41528e-006
4 :K=-1.65423e+000,A4=1.16391e-001,A6=-5.31827e-002,A8=5.74934e-003,A10=-2.95623e-005
5 :K=0.00000e+000,A4=4.47023e-002,A6=-1.41596e-002,A8=-2.14457e-004,A10=-3.44528e-004
6 :K=0.00000e+000,A4=8.25610e-002,A6=-5.50611e-002,A8=4.23568e-002,A10=-9.91868e-003,A12=1.14367e-003
8 :K=0.00000e+000,A4=-1.47631e-001,A6=1.41497e-001,A8=-9.45915e-002,A10=2.18300e-002
9 :K=-2.00000e+000,A4=-8.26021e-002,A6=-7.67482e-003,A8=1.73154e-002,A10=-5.97261e-003
FL 0.904
Fno 2.08
w 187.00
Ymax 1.918
BF 1.582
TL 10.948
Elem Surfs Focal Length Diameter
1 1- 2 -12.6960 12.863
2 3- 4 -2.0254 6.060
3 5- 6 2.8569 3.510
4 8- 9 1.6451 2.751
実施例7におけるレンズデータを表7に示す。図21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、負の屈折力を有する第1レンズL1、負の屈折力を有する第2レンズL2、正の屈折力を有する第3レンズL3、開口絞りS、正の屈折力を有する第4レンズL4からなり、プラスチック材料からなる第1レンズL1の物体側面は非球面形状であって、周辺部が正の屈折力を有する。第1レンズL1は像側に凹面を向け、第2レンズL2は像側に凹面を向け、第3レンズL3は物体側に凸面を向け、第4レンズL4は像側に凸面を向けている。Fはカバーガラス又はIRカットフィルタを想定した平行平板であり、IMは固体撮像素子の撮像面である。
[実施例7]
Reference Wave Length = 587.56 nm
unit: mm
面番号 r d nd vd eff.diameter
1* 99.7730 0.8000 1.54470 56.00 12.924
2* 8.1687 2.1309 7.190
3* 11.6128 1.0310 1.53048 55.72 6.500
4* 0.9622 0.6250 4.153
5* 2.0408 2.0683 1.63200 23.40 3.637
6* 3617.4634 0.4800 1.968
STO INFINITY 0.6382 0.786
8* 3.4476 1.5187 1.53048 55.72 2.535
9* -0.9722 0.5240 2.808
10 INFINITY 0.3000 1.56400 47.00 3.388
11 INFINITY 0.8760 3.471
面番号:非球面係数
1 :K=0.00000e+000,A4=3.80379e-004,A6=1.22722e-007,A8=-4.26696e-008,A10=-8.43442e-010,A12=1.66765e-011
2 :K=0.00000e+000,A4=2.72172e-003,A6=-2.15756e-004,A8=9.08544e-005,A10=-7.06194e-006,A12=2.16274e-007
3 :K=-5.93299e+000,A4=-7.53002e-003,A6=8.93918e-005,A8=5.52211e-005,A10=-3.15012e-006
4 :K=-1.86098e+000,A4=1.31809e-001,A6=-5.13977e-002,A8=5.65127e-003,A10=-1.51596e-004
5 :K=0.00000e+000,A4=4.77225e-002,A6=-7.14230e-003,A8=-8.32799e-004,A10=-1.23057e-004
6 :K=0.00000e+000,A4=1.07470e-001,A6=-5.40565e-002,A8=2.92632e-002,A10=7.91229e-003,A12=1.14367e-003
8 :K=0.00000e+000,A4=-9.86947e-002,A6=8.79011e-002,A8=-3.37835e-002,A10=6.32040e-003
9 :K=-2.00000e+000,A4=-7.03031e-002,A6=2.00520e-002,A8=-9.35167e-003,A10=6.66469e-003
FL 0.905
Fno 2.08
w 187.00
Ymax 1.918
BF 1.700
TL 10.993
Elem Surfs Focal Length Diameter
1 1- 2 -16.3845 12.924
2 3- 4 -2.0463 6.500
3 5- 6 3.2303 3.637
4 8- 9 1.6228 2.808
2 ケーブル
L1 第1レンズ
L2 第2レンズ
L3 第3レンズ
L4 第4レンズ
LN 撮像レンズ
IM 撮像素子
Claims (17)
- 物体側から順に、負の屈折力を有する第1レンズ、負の屈折力を有する第2レンズ、第3レンズ、第4レンズからなり、前記第1レンズの物体側面が非球面形状であり、下記の条件式を満足することを特徴とする撮像レンズ。
-2.8<f2/f<-0.5 (1)
0.0<(r1+r2)/(r1-r2)<2.3 (2)
但し、
f2:前記第2レンズの焦点距離(mm)
f:全系の焦点距離(mm)
r1:前記第1レンズ物体側面の曲率半径(mm)
r2:前記第1レンズ像側面の曲率半径(mm) - 前記第3レンズと前記第4レンズは正の屈折力を有することを特徴とする請求項1に記載の撮像レンズ。
- 前記第1レンズの物体側面は周辺部が正の屈折力を有す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。
- 前記第1レンズは像側に凹面を向け、前記第2レンズは像側に凹面を向け、前記第3レンズは物体側に凸面を向け、前記第4レンズは像側に凸面を向けていることを特徴とする請求項1~3のいずれかに記載の撮像レンズ。
- 前記第1レンズの材料が以下の条件式を満たすことを特徴とする請求項1~4のいずれかに記載の撮像レンズ。
40<ν1<70 (3)
但し
ν1:前記第1レンズのアッベ数 - 前記第1レンズはプラスチック材料からなることを特徴とする請求項1~5のいずれかに記載の撮像レンズ。
- 前記第3レンズと前記第4レンズの間に開口絞りを有することを特徴する請求項1~6のいずれかに記載の撮像レンズ。
- 前記第1レンズの物体側面が、光軸垂線に対し最大となる面角度θ1(°)で交差する光軸からの距離をh1としたときに、光軸からの距離h1/5の位置における光軸垂線に対する面角度をθ2(°)とすると、以下の条件式を満たすことを特徴とする請求項1~7のいずれかに記載の撮像レンズ。
θ1>θ2×6 (4) - 以下の条件式を満たすことを特徴とする請求項1~8のいずれかに記載の撮像レンズ。
-0.06<f/r1<0.06 (5) - 以下の条件式を満たすことを特徴とする請求項1~9のいずれかに記載の撮像レンズ。
1.8<f3/f<4.3 (6)
但し、
f3:前記第3レンズの焦点距離(mm) - 以下の条件式を満たすことを特徴とする請求項1~10のいずれかに記載の撮像レンズ。
-30.0<fl/f<-6.0 (7)
但し、
f1:前記第1レンズの焦点距離(mm) - 以下の条件式を満たすことを特徴とする請求項1~11に記載の撮像レンズ。
2.0<f34/f<4.0 (8)
但し、
f34:前記第3レンズと前記第4レンズの合成焦点距離(mm) - 以下の条件式を満たすことを特徴とする請求項1~12に記載の撮像レンズ。
-1.0≦(r5+r6)/(r5-r6)<-0.2 (9)
但し、
r5:前記第3レンズ物体側面の曲率半径(mm)
r6:前記第3レンズ像側面の曲率半径(mm) - 以下の条件式を満たすことを特徴とする請求項1~13のいずれかに記載の撮像レンズ。
0.8<f3/f4<2.0 (10〉
但し、
f3:前記第3レンズの焦点距離(mm)
f4:前記第4レンズの焦点距離(mm) - 前記第2レンズの像側面は非球面であることを特徴とする請求項1~14のいずれかに記載の撮像レンズ。
- 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1~15のいずれかに記載の撮像レンズ。
- 請求項1~16のいずれかに記載の撮像レンズを備えることを特徴とする撮像装置。
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US14/900,022 US20160139362A1 (en) | 2013-06-20 | 2014-06-03 | Imaging Lens And Imaging Device |
JP2015522719A JPWO2014203720A1 (ja) | 2013-06-20 | 2014-06-03 | 撮像レンズ及び撮像装置 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015184498A (ja) * | 2014-03-25 | 2015-10-22 | カンタツ株式会社 | 撮像レンズ |
WO2017099153A1 (ja) * | 2015-12-07 | 2017-06-15 | 京セラオプテック株式会社 | トロカールおよび低背型光学系レンズ |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102375648B1 (ko) * | 2014-12-17 | 2022-03-17 | 엘지이노텍 주식회사 | 촬상 렌즈, 이를 포함하는 카메라 모듈 및 디지털 기기 |
KR101964181B1 (ko) * | 2017-09-27 | 2019-04-01 | 현대모비스 주식회사 | 자동차용 렌즈 광학계 및 이를 포함한 자동차용 광학 장치 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08313804A (ja) * | 1995-05-19 | 1996-11-29 | Olympus Optical Co Ltd | 広角レンズ |
JP2007025499A (ja) * | 2005-07-20 | 2007-02-01 | Alps Electric Co Ltd | 光学装置 |
JP2008276185A (ja) * | 2007-03-30 | 2008-11-13 | Ricoh Opt Ind Co Ltd | 広角レンズおよび撮影装置 |
JP2009265354A (ja) * | 2008-04-25 | 2009-11-12 | Fujinon Corp | 撮像レンズおよびこの撮像レンズを用いた撮像装置 |
JP2009276371A (ja) * | 2008-05-12 | 2009-11-26 | Olympus Medical Systems Corp | 内視鏡用画像装置 |
JP2011081425A (ja) * | 2005-02-21 | 2011-04-21 | Fujifilm Corp | 広角撮像レンズおよび光学装置 |
JP2011158508A (ja) * | 2010-01-29 | 2011-08-18 | Fujifilm Corp | 撮像レンズおよび撮像装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7446955B1 (en) * | 2007-08-26 | 2008-11-04 | Largan Precision Co., Ltd. | Wide-angle lens system |
CN101861541B (zh) * | 2007-11-22 | 2012-08-01 | 柯尼卡美能达精密光学株式会社 | 广角光学系统、摄像镜头装置、监视照相机及数码器械 |
JP2010243711A (ja) * | 2009-04-03 | 2010-10-28 | Ricoh Co Ltd | 広角レンズ及び撮像装置 |
JP5399306B2 (ja) * | 2009-04-10 | 2014-01-29 | 富士フイルム株式会社 | 撮像レンズおよび撮像装置 |
JP5486408B2 (ja) * | 2009-07-29 | 2014-05-07 | 富士フイルム株式会社 | 撮像レンズおよび撮像装置 |
KR101108802B1 (ko) * | 2009-12-08 | 2012-02-09 | 삼성전기주식회사 | 카메라용 광학계 |
JP5405324B2 (ja) * | 2010-01-04 | 2014-02-05 | 富士フイルム株式会社 | 撮像レンズおよび撮像装置 |
JP5438583B2 (ja) * | 2010-04-01 | 2014-03-12 | 富士フイルム株式会社 | 撮像レンズおよび撮像装置 |
JP5466569B2 (ja) * | 2010-04-26 | 2014-04-09 | 富士フイルム株式会社 | 撮像レンズおよび撮像装置 |
CN104981723B (zh) * | 2013-02-08 | 2017-07-04 | 柯尼卡美能达株式会社 | 摄影光学系统、摄影光学装置以及数字设备 |
US9007702B2 (en) * | 2013-03-03 | 2015-04-14 | Newmax Technology Co., Ltd. | Five-piece optical lens system |
TWI480577B (zh) * | 2013-04-16 | 2015-04-11 | Sintai Optical Shenzhen Co Ltd | 廣角鏡頭 |
-
2014
- 2014-06-03 WO PCT/JP2014/064683 patent/WO2014203720A1/ja active Application Filing
- 2014-06-03 JP JP2015522719A patent/JPWO2014203720A1/ja active Pending
- 2014-06-03 US US14/900,022 patent/US20160139362A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08313804A (ja) * | 1995-05-19 | 1996-11-29 | Olympus Optical Co Ltd | 広角レンズ |
JP2011081425A (ja) * | 2005-02-21 | 2011-04-21 | Fujifilm Corp | 広角撮像レンズおよび光学装置 |
JP2007025499A (ja) * | 2005-07-20 | 2007-02-01 | Alps Electric Co Ltd | 光学装置 |
JP2008276185A (ja) * | 2007-03-30 | 2008-11-13 | Ricoh Opt Ind Co Ltd | 広角レンズおよび撮影装置 |
JP2009265354A (ja) * | 2008-04-25 | 2009-11-12 | Fujinon Corp | 撮像レンズおよびこの撮像レンズを用いた撮像装置 |
JP2009276371A (ja) * | 2008-05-12 | 2009-11-26 | Olympus Medical Systems Corp | 内視鏡用画像装置 |
JP2011158508A (ja) * | 2010-01-29 | 2011-08-18 | Fujifilm Corp | 撮像レンズおよび撮像装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015184498A (ja) * | 2014-03-25 | 2015-10-22 | カンタツ株式会社 | 撮像レンズ |
WO2017099153A1 (ja) * | 2015-12-07 | 2017-06-15 | 京セラオプテック株式会社 | トロカールおよび低背型光学系レンズ |
JPWO2017099153A1 (ja) * | 2015-12-07 | 2018-11-08 | 京セラオプテック株式会社 | トロカールおよび低背型光学系レンズ |
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