Camera lens

Abstract

The present disclosure provides a camera lens which has good optical properties and a narrow angle, and includes five lenses. The camera lens includes, from an object side, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, and a fifth lens having a positive refractive power. The camera lens satisfies specified relational expressions.

Description

TECHNICAL FIELD

The present disclosure relates to a camera lens, and in particular to a camera lens which is suitable for use in a portable modular camera, a WEB camera or the like using a camera element such as a high-pixel CCD or CMOS, has good optical properties, has a full angle of view (hereinafter, referred to as 2ω) being a narrow angle lower than 20°, and includes five lenses.

BACKGROUND

In recent years, various types of camera devices equipped with a camera element such as a CCD and CMOS and others have been widely used. Along with the development of miniaturization and high performance of camera elements, camera lenses with good optical properties and a narrow angle are needed.

The technology related to the camera lens composed of five lenses with a narrow angle and good optical properties is being developed gradually.

A camera lens constituted of five lenses has been proposed, which includes from an object side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; and a fifth lens having a negative refractive power, but 2ω=51.75°, and the narrow angle is not sufficient.

Another camera lens constituted of five lenses has been proposed, which includes from an object side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; and a fifth lens having a negative refractive power, but 2ω≥37.00°, and the narrow angle is not sufficient.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a structural diagram of a camera lens LA according to an embodiment of the present disclosure.

FIG. 2 is a structural diagram of the above-described camera lens LA according to Embodiment 1.

FIG. 3 is a diagram of a spherical aberration of the camera lens LA of Embodiment 1.

FIG. 4 is a diagram of a magnification chromatic aberration of the camera lens LA of Embodiment 1.

FIG. 5 is a diagram of field curvature and distortion of the camera lens LA of Embodiment 1.

FIG. 6 is a structural diagram of the above-described camera lens LA according to Embodiment 2.

FIG. 7 is a diagram of a spherical aberration of the camera lens LA of Embodiment 2.

FIG. 8 is a diagram of a magnification chromatic aberration of the camera lens LA of Embodiment 2.

FIG. 9 is a diagram of field curvature and distortion of the camera lens LA of Embodiment 2.

FIG. 10 is a structural diagram of the above-described camera lens LA according to Embodiment 3.

FIG. 11 is a diagram of a spherical aberration of the camera lens LA of Embodiment 3.

FIG. 12 is a diagram of a magnification chromatic aberration of the camera lens LA of Embodiment 3.

FIG. 13 is a diagram of field curvature and distortion of the camera lens LA of Embodiment 3.

FIG. 14 is a structural diagram of the above-described camera lens LA according to Embodiment 4.

FIG. 15 is a diagram of a spherical aberration of the camera lens LA of Embodiment 4.

FIG. 16 is a diagram of a magnification chromatic aberration of the camera lens LA of Embodiment 4.

FIG. 17 is a diagram of field curvature and distortion of the camera lens LA of Embodiment 4.

FIG. 18 is a structural diagram of the above-described camera lens LA according to Embodiment 5.

FIG. 19 is a diagram of a spherical aberration of the camera lens LA of Embodiment 5.

FIG. 20 is a diagram of a magnification chromatic aberration of the camera lens LA of Embodiment 5.

FIG. 21 is a diagram of field curvature and distortion of the camera lens LA of Embodiment 5.

DESCRIPTION OF EMBODIMENTS

An embodiment of a camera lens according to the present disclosure will be described with reference to the drawings. A diagram showing a structure of the camera lens according to the embodiment of the present disclosure is as shown in FIG. 1. The camera lens LA has a five-lens system which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5, which are arranged from an object side towards an image side. Glass plates GF1 and GP2 are provided between the fifth lens L5 and an imaging plane. The glass plates GF1 and GF2 can be glass plates each using a cover glass or having an IR cut-off filter and other functions. In addition, there may be no glass plates GF1 and GF2 provided between the fifth lens L5 and the imaging plane.

The first lens L1 is a lens having a positive refractive power, the second lens L2 is a lens having a negative refractive power, the third lens L3 is a lens having a positive refractive power, the fourth lens L4 is a lens having a positive refractive power, and the fifth Lens L5 is a lens having a positive refractive power. With respect to the lens surfaces of these five lenses, it is preferable to make them be aspheric surfaces in order to satisfactorily correct various aberrations.

The camera lens LA satisfies the following relational expressions (1) to (2):7.00≤(f1+f3+f4+f5)/f≤12.00  (1);−0.45≤f2/f≤−0.30  (2), andin which:

• f denotes an overall focal length of the lens system,
• f1 denotes a focal length of the first lens;
• f2 denotes a focal length of the second lens;
• f3 denotes a focal length of the third lens;
• f4 denotes a focal length of the fourth lens; and
• f5 denotes a focal length of the fifth lens.

The relational expression (1) specifies a ratio of a sum of the focal length f1 of the first lens L1, the focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4 and the focal length f5 of the fifth lens L5 to the overall focal length f of the lens system. Within the range of the relational expression (1), it is more advantageous to achieve narrow angles with good optical characteristics.

The relational expression (2) specifies a ratio of the focal length f2 of the second lens L2 to the overall focal length f of the lens system. Within the range of the relational expression (2), it is more advantageous to achieve narrow angles with good optical characteristics.

In the camera lens according to the present embodiment, the first lens L1 is a lens having a positive refractive power, the second lens L2 is a lens having a negative refractive power, and the following relational expression (3) is satisfied:−2.00≤f1/f2≤−1.45  (3),where

• f1 denotes a focal length of the first lens L1; and
• f2 denotes a focal length of the second lens L2.

The relational expression (3) specifies a ratio of the focal length f1 of the first lens L1 to the focal length f2 of the second lens L2. Within the range of the relational expression (3), it is more advantageous to achieve narrow angles with good optical characteristics.

In the camera lens according to the present embodiment, the first lens L1 is a lens having a positive refractive power, and the following relational expression (4) is satisfied:−0.20≤R1/R2≤−0.08  (4),where

• R1 is a curvature radius of an object side surface of the first lens L1; and
• R2 is a curvature radius of an image side surface of the first lens L2.

The relational expression (4) specifies a ratio of the curvature radius R1 of the object side surface of the first lens L1 to the curvature radius R2 of the image side surface of the first lens L1. Within the range of the relational expression (4), it is more advantageous to achieve narrow angles with good optical characteristics.

In the camera lens according to the present embodiment, the second lens L2 is a lens having a negative refractive power, and the following relational expression (5) is satisfied:0.10≤R3/R4≤0.25  (5),where

• R3 is a curvature radius of an object side surface of the second lens L2; and
• R4 is a curvature radius of an image side surface of the second lens L2.

The relational expression (5) specifies a ratio of the curvature radius R3 of the object side surface of the second lens L2 to the curvature radius R4 of the image side surface of the second lens L2. Within the range of the relational expression (5), it is more advantageous to achieve narrow angles with good optical characteristics.

In the camera lens according to the present embodiment, the third lens L3 is a lens having a negative refractive power, and the following relational expression (6) is satisfied:−0.35≤R5/R6≤−0.05  (6),where

• R5 is a curvature radius of an object side surface of the third lens L3; and
• R6 is a curvature radius of an image side surface of the third lens L3.

The relational expression (6) specifies a ratio of the curvature radius R5 of the object side surface of the third lens L3 to the curvature radius R6 of the image side surface of the third lens L3. Within the range of the relational expression (6), it is more advantageous to achieve narrow angles with good optical characteristics.

Each of the five lenses constituting the camera lens LA satisfies the structure and relational expression described above, and it is possible to obtain a camera lens which has a narrow angle and good optical properties.

EMBODIMENTS

• f: the overall focal length of the camera lens LA;
• f1: the focal length of the first lens L1;
• f2: the focal length of the second lens L2;
• f3: the focal length of the third lens L3;
• f4: the focal length of the fourth lens L4;
• f5: the focal length of the fifth lens L5;
• Fno: F-number;
• 2ω: full angle of view;
• STOP: open aperture;
• R: the curvature radius of the optical surface, which is the center curvature radius of the lens;
• R1: the curvature radius of the object side surface of the first lens L1;
• R2: the curvature radius of the image side surface of the first lens L1;
• R3: the curvature radius of the object side surface of the second lens L2;
• R4: the curvature radius of the image side surface of the second lens L2;
• R5: the curvature radius of the object side surface of the third lens L3;
• R6: the curvature radius of the image side surface of the third lens L3;
• R7: the curvature radius of the object side surface of the fourth lens L4;
• R8: the curvature radius of the image side surface of the fourth lens L4;
• R9: the curvature radius of the object side surface of the fifth lens L5;
• R10: the curvature radius of the image side surface of the fifth lens L5;
• R11: the curvature radius of the object side surface of the glass plate GF1;
• R12: the curvature radius of the image side surface of the glass plate GF1;
• R13: the curvature radius of the object side surface of the glass plate GF2;
• R14: the curvature radius of the image side surface of the glass plate GF2;
• d: the center thickness of the lens or the distance between the lenses;
• d1: the center thickness of the first lens L1;
• d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;
• d3: the center thickness of the second lens L2;
• d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;
• d5: the center thickness of the third lens L3;
• d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;
• d7: the center thickness of the fourth lens L4;
• d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;
• d9: the center thickness of the fifth lens L5;
• d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the glass plate GF1;
• d11: the center thickness of the glass plate GF1;
• d12: the axial distance from the image side surface of the glass plate GF1 to the object side surface of the glass plate GF12;
• d13: the center thickness of the glass plate GF12;
• d14: the axial distance from the image side surface of the glass plate GF2 to the imaging plane;
• nd: the refractive index of line d;
• nd1: the refractive index of lined of the first lens L1;
• nd2: the refractive index of line d of the second lens L2;
• nd3: the refractive index of line d of the third lens L3;
• nd4: the refractive index of line d of the fourth lens L4;
• nd5: the refractive index of line d of the fifth lens L5;
• nd6: the refractive index of line d of the glass plate GF1;
• nd7: the refractive index of line d of the glass plate GF2;
• ν: the Abbe number;
• ν1: the Abbe number of the first lens L1;
• ν2: the Abbe number of the second lens L2;
• ν3: the Abbe number of the third lens L3;
• ν4: the Abbe number of the fourth lens L4;
• ν5: the Abbe number of the fifth lens L5;
• ν6: the Abbe number of the glass plate GF1;
• ν7: the Abbe number of the glass plate GF2;
• TTL: optical length (the axial distance from the object side surface of the first lens L1 to the imaging plane);
• LB: the axial distance from the image side surface of the fifth lens L5 to the imaging plane (including thicknesses of the glass plates GF1 and GF2); and
• IH: image height.y=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴  (7)

R is the axial curvature radius, k is the conic coefficient, and A4, A6, A8, A10, A12 and A14 are aspheric coefficients.

For the sake of convenience, the aspheric surface represented by the relational expression (7) is used as an aspheric surface of each of the lenses. However, the present disclosure is not limited to the aspheric surface represented by the relational expression (7).

Embodiment 1

FIG. 2 is a structural diagram of the camera lens LA of Embodiment 1. Each of the first lens L1 to the fifth lens L5 constituting the camera lens LA of Embodiment 1 has a curvature radius R of the object side and image side, a center thickness of the lens or a distance d between the lenses, a refractive index nd and an Abbe number νd as shown in Table 1, a conic coefficient k and an aspheric coefficient as shown in Table 2, and 2ω, Fno, f, f1, f2, f3, f4, f5, TTL and IH as shown in Table 3.

TABLE 1
					Effective
					Radius
	R (mm)	d (mm)	nd	νd	(mm)
R1	6.0971	d1	4.192	nd1	1.5439	ν1	55.95	3.488
R2	−33.8729	d2	1.726					2.770
R3	−3.4779	d3	0.608	nd2	1.6606	ν2	20.40	2.154
R4	−18.6600	d4	0.142					2.062
STOP	∞		0.911					2.020
R5	19.5727	d5	0.505	nd3	1.6606	ν3	20.40	2.044
R6	−150.5595	d6	0.191					2.050
R7	−11.6730	d7	0.354	nd4	1.6150	ν4	25.92	2.049
R8	−8.5682	d8	0.050					2.026
R9	5.4842	d9	2.413	nd5	1.5439	ν5	55.95	2.076
R10	5.7120	d10	0.500					2.031
R11	∞	d11	6.000	nd6	1.7725	ν6	49.60	2.052
R12	∞	d12	1.514					2.384
R13	∞	d13	0.210	nd7	1.5168	ν7	64.17	2.534
R14	∞	d14	1.050					2.548

TABLE 2
	Conic
	coefficient	Aspheric coefficient
	k	A4	A6	A8	A10	A12	A14
R1	0.0000E+00	7.2816E−07	4.3222E−06	−4.5084E−07	0.0000E+00	0.0000E+00	0.0000E+00
R2	0.0000E+00	1.6177E−03	−1.4425E−04	3.6718E−06	0.0000E+00	0.0000E+00	0.0000E+00
R3	−1.3727E+01	6.8812E−03	−5.2761E−03	1.3593E−03	−1.7636E−04	9.3101E−06	0.0000E+00
R4	0.0000E+00	4.4010E−02	−2.1327E−02	5.8907E−03	−9.9275E−04	9.2575E−05	−3.7060E−06
R5	0.0000E+00	1.7661E−02	−2.9537E−03	−3.9329E−03	1.6534E−03	−2.4322E−04	1.2047E−05
R6	0.0000E+00	−3.0496E−02	3.8217E−02	−2.2730E−02	6.5018E−03	−8.8667E−04	4.6794E−05
R7	0.0000E+00	−6.4195E−02	7.2619E−02	−3.3743E−02	8.3180E−03	−1.0623E−03	5.4614E−05
R8	−2.1380E+00	−2.1982E−02	3.1169E−02	−1.3072E−02	2.6964E−03	−2.9564E−04	1.3248E−05
R9	3.9513E+00	−1.1452E−02	2.2362E−03	−1.4785E−03	3.9142E−04	−5.8130E−05	3.2430E−06
R10	5.0606E+00	−8.6214E−03	−9.9414E−04	6.4323E−04	−2.8055E−04	5.4493E−05	−4.8542E−06

TABLE 3
2ω (°)   18.00
Fno      2.50
f (mm)   16.444
f1 (mm)  9.865
f2 (mm)  −6.576
f3 (mm)  26.254
f4 (mm)  50.200
f5 (mm)  53.429
TTL (mm) 20.367
LB (mm)  9.274
IH (mm)  2.619

Table 16 below shows the numerical values defined in Embodiments 1 to 5 and the numerical values corresponding to the parameters specified by the relational expressions (1) to (6).

As shown in Table 16, Embodiment 1 satisfies the relational expressions (1) to (6).

The spherical aberration of the camera lens LA of Embodiment 1 is as shown in FIG. 3, the magnification chromatic aberration of magnification thereof is as shown in FIG. 4, and the field curvature and the distortion are as shown in FIG. 5. Furthermore, the field curvature S in FIG. 5 is the field curvature for the sagittal imaging plane, and T is the field curvature for the meridianal imaging plane, and the same applies to Embodiments 2 to 5. As shown in Table 3, the camera lens LA of Embodiment 1 has a narrow angle. As can be seen from FIGS. 3 to 5, the camera lens LA of Embodiment 1 has good optical properties.

Embodiment 2

FIG. 6 is a structural diagram of the camera lens LA of Embodiment 2. Each of the first lens L1 to the fifth lens L5 constituting the camera lens LA of Embodiment 2 has a curvature radius R of the object side and image side, a center thickness of the lens or a distance d between the lenses, a refractive index nd and an Abbe number vd as shown in Table 4, a conic coefficient k and an aspheric coefficient as shown in Table 5, and 2ω, Fno, f, f1, f2, f3, f4, f5, TTL and IH as shown in Table 6.

TABLE 4
					Effective
					Radius
	R (mm)	d (mm)	nd	νd	(mm)
R1	5.8736	d1	4.598	nd1	1.5439	ν1	55.95	3.558
R2	−57.1741	d2	1.330					2.642
R3	−3.4985	d3	0.488	nd2	1.6606	ν2	20.40	2.189
R4	−19.0674	d4	0.373					2.107
STOP	∞		0.173					2.036
R5	15.4276	d5	0.669	nd3	1.6606	ν3	20.40	2.066
R6	−45.3972	d6	0.515					2.029
R7	−4.3454	d7	0.487	nd4	1.6150	ν4	25.92	2.000
R8	−4.2288	d8	0.050					2.016
R9	5.7136	d9	2.231	nd5	1.5439	ν5	55.95	2.050
R10	5.9139	d10	0.500					2.013
R11	∞	d11	6.000	nd6	1.7725	ν6	49.60	2.034
R12	∞	d12	1.833					2.362
R13	∞	d13	0.210	nd7	1.5168	ν7	64.17	2.540
R14	∞	d14	1.050					2.553

TABLE 5
	Conic
	coefficient	Aspheric coefficient
	k	A4	A6	A8	A10	A12	A14
R1	0.0000E+00	−4.8363E−05	7.3906E−06	−1.0729E−07	0.0000E+00	0.0000E+00	0.0000E+00
R2	0.0000E+00	−3.9287E−04	1.7018E−04	−1.3108E−05	0.0000E+00	0.0000E+00	0.0000E+00
R3	−1.1254E+01	3.7449E−03	−6.2480E−03	2.2916E−03	−3.6772E−04	2.1826E−05	0.0000E+00
R4	0.0000E+00	4.5501E−02	−2.4999E−02	6.9076E−03	−9.0705E−04	3.8104E−05	1.0180E−06
R5	0.0000E+00	2.1143E−02	−1.2668E−02	1.8083E−03	3.0569E−04	−9.2082E−05	6.0773E−06
R6	0.0000E+00	−2.7968E−04	−2.8025E−03	−1.1845E−04	3.7203E−04	−7.1450E−05	4.5193E−06
R7	0.0000E+00	−1.1893E−03	6.4305E−03	−4.4240E−03	1.6371E−03	−3.2134E−04	2.4943E−05
R8	−1.6304E+00	1.1861E−02	−5.5245E−03	1.7742E−03	−1.9042E−04	−2.3993E−05	4.6819E−06
R9	5.2707E+00	1.4485E−03	−1.2074E−02	6.2051E−03	−1.7497E−03	2.5991E−04	−1.7064E−05
R10	6.1276E+00	−8.7444E−03	−9.2532E−04	7.9874E−04	−3.9218E−04	8.5660E−05	−8.5218E−06

TABLE 6
2ω (°)   18.00
Fno      2.50
f (mm)   16.439
f1 (mm)  10.051
f2 (mm)  −6.569
f3 (mm)  17.509
f4 (mm)  98.896
f5 (mm)  62.996
TTL (mm) 20.508
LB (mm)  9.593
IH (mm)  2.619

As shown in Table 16, Embodiment 2 satisfies the relational expressions (1) to (6).

The spherical aberration of the camera lens LA of Embodiment 2 is as shown in FIG. 7, the magnification chromatic aberration of magnification thereof is as shown in FIG. 8, and the field curvature and the distortion are as shown in FIG. 9. As shown in Table 6, the camera lens LA of Embodiment 2 has a narrow angle. As can be seen from FIGS. 7 to 9, the camera lens LA of Embodiment 2 has good optical properties.

Embodiment 3

FIG. 10 is a structural diagram of the camera lens LA of Embodiment 3. Each of the first lens L1 to the fifth lens L5 constituting the camera lens LA of Embodiment 1 has a curvature radius R of the object side and image side, a center thickness of the lens or a distance d between the lenses, a refractive index nd and an Abbe number vd as shown in Table 7, a conic coefficient k and an aspheric coefficient as shown in Table 8, and 2ω, Fno, f, f1, f2, f3, f4, f5, TTL and IH as shown in Table 9.

TABLE 7
					Effective
					Radius
	R (mm)	d (mm)	nd	νd	(mm)
R1	5.9599	d1	4.553	nd1	1.5439	ν1	55.95	3.478
R2	−48.6640	d2	1.535					2.654
R3	−3.5330	d3	0.276	nd2	1.6606	ν2	20.40	2.100
R4	−18.8333	d4	0.137					2.055
STOP	∞		0.135					2.017
R5	18.5184	d5	1.198	nd3	1.6606	ν3	20.40	2.057
R6	−55.0356	d6	0.493					2.003
R7	−4.5524	d7	1.076	nd4	1.6150	ν4	25.92	1.984
R8	−4.2366	d8	0.081					2.056
R9	5.7382	d9	2.068	nd5	1.5439	ν5	55.95	2.129
R10	5.8046	d10	0.500					2.115
R11	∞	d11	6.000	nd6	1.7725	ν6	49.60	2.133
R12	∞	d12	1.841					2.406
R13	∞	d13	0.210	nd7	1.5168	ν7	64.17	2.555
R14	∞	d14	1.050					2.566

TABLE 8
	Conic
	coefficient	Aspheric coefficient
	k	A4	A6	A8	A10	A12	A14
R1	0.0000E+00	−2.3007E−05	7.0614E−06	−4.7619E−07	0.0000E+00	0.0000E+00	0.0000E+00
R2	0.0000E+00	−6.4283E−05	5.6494E−05	−8.2921E−06	0.0000E+00	0.0000E+00	0.0000E+00
R3	−1.0862E+01	7.1680E−03	−8.9927E−03	3.1817E−03	−5.0425E−04	2.8910E−05	0.0000E+00
R4	0.0000E+00	4.4715E−02	−2.1906E−02	4.3028E−03	−8.1889E−05	−6.1647E−05	3.8884E−06
R5	0.0000E+00	1.2997E−02	−2.6397E−03	−3.1795E−03	1.4390E−03	−1.8965E−04	6.2731E−06
R6	0.0000E+00	−5.0769E−03	7.5690E−03	−7.3717E−03	2.7639E−03	−4.6618E−04	3.1374E−05
R7	0.0000E+00	2.8080E−03	6.9540E−03	−8.1730E−03	3.7420E−03	−8.0178E−04	6.6348E−05
R8	−1.7135E+00	1.6467E−02	−1.1647E−02	5.1830E−03	−1.1326E−03	9.9078E−05	−1.3234E−06
R9	5.1028E+00	4.7754E−03	−1.5056E−02	8.0189E−03	−2.3495E−03	3.4630E−04	−2.1030E−05
R10	5.3531E+00	−1.1425E−02	−5.7153E−04	6.7000E−04	−3.2326E−04	6.4624E−05	−5.6272E−06

TABLE 9
2ω (°)   18.00
Fno      2.50
f (mm)   16.533
f1 (mm)  10.057
f2 (mm)  −6.631
f3 (mm)  21.114
f4 (mm)  43.223
f5 (mm)  77.039
TTL (mm) 21.152
LB (mm)  9.601
IH (mm)  2.619

As shown in Table 16, Embodiment 3 satisfies the relational expressions (1) to (6).

The spherical aberration of the camera lens LA of Embodiment 3 is as shown in FIG. 11, the magnification chromatic aberration of magnification thereof is as shown in FIG. 12, and the field curvature and the distortion are as shown in FIG. 13. As shown in Table 9, the camera lens LA of Embodiment 3 has a narrow angle. As can be seen from FIGS. 11 to 13, the camera lens LA of Embodiment 3 has good optical properties.

Embodiment 4

FIG. 14 is a structural diagram of the camera lens LA of Embodiment 4. Each of the first lens L1 to the fifth lens L5 constituting the camera lens LA of Embodiment 4 has a curvature radius R of the object side and image side, a center thickness of the lens or a distance d between the lenses, a refractive index nd and an Abbe number vd as shown in Table 10, a conic coefficient k and an aspheric coefficient as shown in Table 11, and 2ω, Fno, f, f1, f2, f3, f4, f5, TTL and IH as shown in Table 12.

TABLE 10
					Effective
					Radius
	R (mm)	d (mm)	nd	νd	(mm)
R1	5.9634	d1	4.600	nd1	1.5439	ν1	55.95	3.492
R2	−35.2721	d2	1.487					2.664
R3	−3.0679	d3	0.557	nd2	1.6606	ν2	20.40	2.145
R4	−27.8900	d4	0.179					2.052
STOP	∞		0.351					2.015
R5	9.1298	d5	0.755	nd3	1.6606	ν3	20.40	2.065
R6	−44.2634	d6	0.549					2.012
R7	−4.3992	d7	0.399	nd4	1.6150	ν4	25.92	1.981
R8	−4.2435	d8	0.050					1.991
R9	5.6357	d9	1.929	nd5	1.5439	ν5	55.95	2.031
R10	5.8279	d10	0.500					2.005
R11	∞	d11	6.000	nd6	1.7725	ν6	49.60	2.026
R12	∞	d12	1.964					2.348
R13	∞	d13	0.210	nd7	1.5168	ν7	64.17	2.536
R14	∞	d14	1.050					2.549

TABLE 11
	Conic
	coefficient	Aspheric coefficient
	k	A4	A6	A8	A10	A12	A14
R1	0.0000E+00	−3.9317E−05	3.1747E−06	−4.2960E−07	0.0000E+00	0.0000E+00	0.0000E+00
R2	0.0000E+00	9.2222E−04	−1.1761E−04	3.1744E−06	0.0000E+00	0.0000E+00	0.0000E+00
R3	−1.0859E+01	2.3729E−03	−3.8598E−03	1.0791E−03	−1.2446E−04	4.7457E−05	0.0000E+00
R4	0.0000E+00	4.6614E−02	−2.4695E−02	7.1474E−03	−1.3064E−03	1.5999E−04	−1.0112E−05
R5	0.0000E+00	1.3555E−02	−5.0604E−03	−1.2912E−03	6.2364E−04	−3.4468E−05	−3.2320E−06
R6	0.0000E+00	−2.7598E−03	8.2922E−03	−8.6939E−03	3.1651E−03	−5.0630E−04	3.2676E−05
R7	0.0000E+00	−9.8487E−04	1.3209E−02	−1.2364E−02	5.2167E−03	−1.0819E−03	8.7987E−05
R8	−1.9155E+00	1.6941E−02	−1.1170E−02	5.0192E−03	−1.0912E−03	7.1087E−05	3.5048E−06
R9	5.3947E+00	5.8242E−03	−1.8439E−02	1.1069E−02	−3.6454E−03	6.1469E−04	−4.2859E−05
R10	5.8437E+00	−8.8864E−03	−1.8093E−03	1.4711E−03	−6.4484E−04	1.3410E−04	−1.2036E−05

TABLE 12
2ω (°)   17.99
Fno      2.50
f (mm)   16.478
f1 (mm)  9.762
f2 (mm)  −5.266
f3 (mm)  11.523
f4 (mm)  98.677
f5 (mm)  69.275
TTL (mm) 20.580
LB (mm)  9.724
IH (mm)  2.619

As shown in Table 16, Embodiment 4 satisfies the relational expressions (1) to (6).

The spherical aberration of the camera lens LA of Embodiment 4 is as shown in FIG. 15, the magnification chromatic aberration of magnification thereof is as shown in FIG. 16, and the field curvature and the distortion are as shown in FIG. 17. As shown in Table 12, the camera lens LA of Embodiment 4 has a narrow angle. As can be seen from FIGS. 15 to 17 the camera lens LA of Embodiment 4 has good optical properties.

Embodiment 5

FIG. 18 is a structural diagram of the camera lens LA of Embodiment 5. Each of the first lens L1 to the fifth lens L5 constituting the camera lens LA of Embodiment 5 has a curvature radius R of the object side and image side, a center thickness of the lens or a distance d between the lenses, a refractive index nd and an Abbe number vd as shown in Table 13, a conic coefficient k and an aspheric coefficient as shown in Table 14, and 2ω, Fno, f, f1, f2, f3, f4, f5, TTL and IH as shown in Table 15.

TABLE 13
					Effective
					Radius
	R (mm)	d (mm)	nd	νd	(mm)
R1	6.1007	d1	4.195	nd1	1.5439	ν1	55.95	3.400
R2	−33.8926	d2	1.398					3.410
R3	−3.6264	d3	0.449	nd2	1.6606	ν2	20.40	2.928
R4	−22.9725	d4	0.167					2.371
STOP	∞		0.328					2.169
R5	26.8288	d5	0.803	nd3	1.6606	ν3	20.40	2.170
R6	−205.5056	d6	0.080					2.140
R7	−15.0717	d7	0.573	nd4	1.6150	ν4	25.92	2.151
R8	−9.2912	d8	0.050					2.101
R9	4.8621	d9	2.177	nd5	1.5439	ν5	55.95	2.039
R10	5.3424	d10	0.500					2.034
R11	∞	d11	6.000	nd6	1.7725	ν6	49.60	2.053
R12	∞	d12	2.345					2.345
R13	∞	d13	0.210	nd7	1.5168	ν7	64.17	2.548
R14	∞	d14	1.050					2.560

TABLE 14
	Conic
	coefficient	Aspheric coefficient
	k	A4	A6	A8	A10	A12	A14
R1	0.0000E+00	2.1257E−05	1.5340E−07	6.5263E−08	0.0000E+00	0.0000E+00	0.0000E+00
R2	0.0000E+00	2.0735E−03	−5.2894E−05	−1.6288E−06	0.0000E+00	0.0000E+00	0.0000E+00
R3	−1.6926E+01	5.9618E−03	−3.2002E−03	8.0629E−04	−1.1644E−04	6.8799E−06	0.0000E+00
R4	0.0000E+00	5.5380E−02	−2.7003E−02	7.2189E−03	−1.2148E−03	1.1496E−04	−4.4200E−06
R5	0.0000E+00	3.0028E−02	−6.6986E−03	−5.2680E−03	2.3254E−03	−3.3998E−04	1.7868E−05
R6	0.0000E+00	−9.4896E−02	9.0683E−02	−4.4054E−02	1.1527E−02	−1.5305E−03	8.2136E−05
R7	0.0000E+00	−1.3929E−01	1.3906E−01	−6.1912E−02	1.5302E−02	−2.0008E−03	1.0726E−04
R8	−1.8021E+01	−2.1278E−02	4.0450E−02	−2.1600E−02	5.7000E−03	−7.7619E−04	4.3111E−05
R9	2.3095E+00	−7.6939E−03	4.3371E−03	−6.0627E−03	2.2438E−03	−3.7462E−04	2.4178E−05
R10	3.7177E+00	−9.6949E−03	−1.2892E−03	4.6252E−04	−1.1278E−04	1.3143E−05	−8.9383E−07

TABLE 15
2ω (°)   18.00
Fno      2.50
f (mm)   16.432
f1 (mm)  9.870
f2 (mm)  −6.580
f3 (mm)  35.739
f4 (mm)  37.959
f5 (mm)  38.295
TTL (mm) 20.326
LB (mm)  10.105
IH (mm)  2.619

As shown in Table 16, Embodiment 5 satisfies the relational expressions (1) to (6).

The spherical aberration of the camera lens LA of Embodiment 1 is as shown in FIG. 19, the magnification chromatic aberration of magnification thereof is as shown in FIG. 20, and the field curvature and the distortion are as shown in FIG. 21. As shown in Table 15, the camera lens LA of Embodiment 5 has a narrow angle. As can be seen from FIGS. 19 to 21, the camera lens LA of Embodiment 5 has good optical properties.

Table 16 shows the numerical values defined in Embodiments 1 to 5 and the numerical values corresponding to the parameters specified by the relational expressions (1) to (6).

TABLE 16
	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5
(f1 + f3 + f4 + f5)/f	8.498	11.525	9.159	11.484	7.416	Exp(1)
f2/f	−0.400	−0.400	−0.401	−0.320	−0.400	Exp(2)
f1/f2	−1.500	−1.530	−1.517	−1.854	−1.500	Exp(3)
R1/R2	−0.180	−0.103	−0.122	−0.169	−0.180	Exp(4)
R3/R4	0.186	0.183	0.188	0.110	0.158	Exp(5)
R5/R6	−0.130	−0.340	−0.336	−0.206	−0.130	Exp(6)

LIST OF REFERENCE NUMBERS

• LA: camera lens
• STOP: open aperture
• L1: the first lens
• L2: the second lens
• L3: the third lens
• L4: the fourth lens
• L5: the fifth lens
• GF1: glass plate 1
• GF2: glass plate 2
• R: the curvature radius of the optical surface, which is the center curvature radius of the lens
• R1: the curvature radius of the object side surface of the first lens L1
• R2: a curvature radius of the image side surface of the first lens L1
• R3: a curvature radius of the object side surface of the second lens L2
• R4: a curvature radius of the image side surface of the second lens L2
• R5: a curvature radius of the object side surface of the third lens L3
• R6: a curvature radius of the image side surface of the third lens L3
• R7: a curvature radius of the object side surface of the fourth lens L4
• R8: a curvature radius of the image side surface of the fourth lens L4
• R9: a curvature radius of the object side surface of the fifth lens L5
• R10: a curvature radius of the image side surface of the fifth lens L5
• R11: a curvature radius of the object side surface of the glass plate GF1
• R12: a curvature radius of the image side surface of the glass plate GF1
• R13: a curvature radius of the object side surface of the glass plate GF2
• R14: a curvature radius of the image side surface of the glass plate GF2
• d: the center thickness of the lens or the distance between the lenses
• d1: the center thickness of the first lens L1
• d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2
• d3: the center thickness of the second lens L2
• d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3
• d5: the center thickness of the third lens L3
• d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4
• d7: the center thickness of the fourth lens L4
• d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5
• d9: the center thickness of the fifth lens L5
• d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the glass plate GF1;
• d11: the center thickness of the glass plate GF1;
• d12: the axial distance from the image side surface of the glass plate GF1 to the object side surface of the glass plate GF12;
• d13: the center thickness of the glass plate GF12;
• d14: the axial distance from the image side surface of the glass plate GF2 to the imaging plane;
• nd: the refractive index of line d;
• nd1: the refractive index of lined of the first lens L1;
• nd2: the refractive index of line d of the second lens L2;
• nd3: the refractive index of line d of the third lens L3;
• nd4: the refractive index of line d of the fourth lens L4;
• nd5: the refractive index of line d of the fifth lens L5;
• nd6: the refractive index of line d of the glass plate GF1;
• nd7: the refractive index of line d of the glass plate GF2;
• ν: the Abbe number;
• ν1: the Abbe number of the first lens L1;
• ν2: the Abbe number of the second lens L2;
• ν3: the Abbe number of the third lens L3;
• ν4: the Abbe number of the fourth lens L4;
• ν5: the Abbe number of the fifth lens L5;
• ν6: the Abbe number of the glass plate GF1;
• ν7: the Abbe number of the glass plate GF2.

Claims

1. A camera lens, comprising, from an object side: a first lens having a positive refractive power;a second lens having a negative refractive power;a third lens having a positive refractive power;a fourth lens having a positive refractive power; anda fifth lens having a positive refractive power,wherein the camera lens comprises a total of five lenses,wherein the camera lens satisfies the following relational expressions (1) to (2): 7.00≤(f1+f3+f4+f5)/f≤12.00  (1);−0.45≤f2/f≤−0.30  (2), andWhereinf denotes an overall focal length of the camera lens,f1 denotes a focal length of the first lens;f2 denotes a focal length of the second lens;f3 denotes a focal length of the third lens;f4 denotes a focal length of the fourth lens; andf5 denotes a focal length of the fifth lens.

2. The camera lens as described in claim 1, wherein: the camera lens satisfies the following relational expression (3): −2.00≤f1/f2≤−1.45  (3).

3. The camera lens as described in claim 1, wherein: the camera lens satisfies the following relational expression (4): −0.20≤R1/R2≤−0.08  (4),WhereinR1 is a curvature radius of an object side surface of the first lens; andR2 is a curvature radius of an image side surface of the first lens.

4. The camera lens as described in claim 1, wherein: the camera lens satisfies the following relational expression (5): 0.10≤R3/R4≤0.25  (5),WhereinR3 is a curvature radius of an object side surface of the second lens; andR4 is a curvature radius of an image side surface of the second lens.

5. The camera lens as described in claim 1, wherein: the camera lens satisfies the following relational expression (6): −0.35≤R5/R6≤−0.05  (6),WhereinR5 is a curvature radius of an object side surface of the third lens; andR6 is a curvature radius of an image side surface of the third lens.