CN108431663B - Standard to telephoto lens system for photographing images - Google Patents
Standard to telephoto lens system for photographing images Download PDFInfo
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- CN108431663B CN108431663B CN201680075772.9A CN201680075772A CN108431663B CN 108431663 B CN108431663 B CN 108431663B CN 201680075772 A CN201680075772 A CN 201680075772A CN 108431663 B CN108431663 B CN 108431663B
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- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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Abstract
The invention relates to a six-lens system (10) comprising, in order from an object side (O) to an image side (I): a first lens element (110) having a positive refractive power, an object-side surface (110a) of which is convex, and at least one of an object-side surface (110a) and an image-side surface (110b) of the first lens element (110) is aspheric; a second lens element (120) having a negative refractive power, an image-side surface (120b) of which is concave, and at least one of an object-side surface (120a) and the image-side surface (120b) of the second lens element (120) is aspherical; a third lens element (130) having a positive refractive power, an object-side surface (130a) of which is convex, and at least one of an object-side surface (130a) and an image-side surface (130b) of the third lens element (130) is aspheric; a diaphragm; a fourth lens element (140) having a negative refractive power, an object-side surface (140a) of which is concave, and at least one of an object-side surface (140a) and an image-side surface (140b) of the fourth lens element (140) is aspherical; a fifth lens element (150) having a concave image-side surface (150b), and at least one of an object-side surface (150a) and the image-side surface (150b) of the fifth lens element (150) being aspheric; and a sixth lens element (160) having a negative refractive power, an image-side surface (160b) of which is concave, and at least one of an object-side surface (160a) and the image-side surface (160b) of the sixth lens element (160) is aspherical. The following relation is satisfied: 1.5< f/| f1| < 2.5.
Description
Background
Technical Field
The present invention relates to an optical lens system for capturing an image, and more particularly, to a standard-to-telephoto lens system for capturing an image. The telephoto lens system is miniaturized to be installed in a mobile device camera such as a mobile phone camera.
Description of the Related Art
In recent years, with the popularization of mobile phone cameras, optical lens systems for capturing images have become thinner, and electronic imaging sensors of general digital cameras are generally Charge Coupled Devices (CCDs) or complementary metal-oxide-semiconductor (CMOS) sensors. With the progress of semiconductor manufacturing, the pixel size of the sensor is continuously reduced, and the resolution of a miniaturized optical lens system for capturing an image is also higher and higher.
Conventional high resolution cell phone cameras typically have a wide viewing angle. However, the resolution of the cell phone camera does not comply with a user request to capture images of various angles of view represented by the telephoto lens. Particularly, with the rise of the dual camera system in recent years, the demand for various camera functions is increasing. It is desirable to achieve a high performance compact standard to telephoto lens. However, to realize a high-performance standard lens or telephoto lens, an increase in size is required.
In an example of a telephoto lens, U.S. patent application No. 2015/0116569 discloses an image pickup lens assembly composed of 4 and 5 lenses, which is used in an optimal optical system of a telephoto camera.
However, due to the shortened back focal length, advanced camera lens assemblies are not suitable. If the back focal length is ensured by increasing the size of the CCD lens assembly, the total length of the optical system will be lengthened. Because the space of a general mobile device such as a mobile phone is small and limited, the traditional configuration cannot meet the dual requirements of quality and space.
Disclosure of Invention
The present invention reduces and/or eliminates the above-mentioned disadvantages.
It is a primary object of the present invention to provide a standard to telephoto lens system having six optical lenses for imaging high quality images without having an excessively long total track length. The standard-to-telephoto lens system is applicable not only to high resolution mobile device cameras, but also has a standard-to-narrow field of view, a large aperture, high pixels, high resolution, and low height.
The invention provides a six-piece optical lens system, which sequentially comprises the following components from an object side surface to an image side surface: a first lens element having a positive refractive power, an object-side surface of which is a convex surface, and at least one of an object-side surface and an image-side surface of which is an aspherical surface; a second lens element having a negative refractive power, an image-side surface of which is concave, and at least one of an object-side surface and an image-side surface of which is aspherical; a third lens element having a positive refractive power, an object-side surface of which is a convex surface, and at least one of an object-side surface and an image-side surface of which is an aspherical surface; a diaphragm; a fourth lens element having a negative refractive power, an object-side surface of which is a concave surface, and at least one of the object-side surface and the image-side surface of which is an aspherical surface; a fifth lens element having a concave image-side surface, wherein at least one of an object-side surface and an image-side surface of the fifth lens element is aspheric; and a sixth lens element having a negative refractive power, an image-side surface of which is concave, and at least one of an object-side surface and an image-side surface of which is aspherical.
According to an aspect of the six-piece optical lens system, a stop is located at an arbitrary position between the first lens element and the fourth lens element, or on the object side of the first lens element.
According to an aspect of the six-piece optical lens system, a focal length of the six-piece optical lens system is f, a focal length of the first lens element is f1, and the following relation is satisfied: 1.5< f/| f1| < 2.5. If f/| f1| satisfies the above relation, a narrow field of view, a large aperture, a high pixel, and a low height can be provided, and the resolution can be significantly improved. In addition, the arrangement of the lens elements is advantageous in that the track length is short. On the contrary, if f/| f1| is outside the above range, the performance and resolution of the optical lens system of low height are degraded and the yield is low. These effects can be enhanced by the following conditional expressions: 1.7< f/| f1| < 2.3.
According to an aspect of the six-piece optical lens system, a combined focal length of the second lens element, the third lens element, and the fourth lens element is f234, a focal length of the six-piece optical lens system is f, and the following relation is satisfied: 0.6< | f/| f234| < 2.6. If | f |/| f234| satisfies the above relation, a narrow field of view, a large aperture, high pixels, and low height can be provided, and the resolution can be significantly improved. On the contrary, if | f |/| f234| exceeds the above range, the performance and resolution of the optical lens system of low height are degraded and the yield is low. These effects can be enhanced by the following conditional expressions: 0.75< | f/| f234| < 2.4. According to an aspect of the six-piece optical lens system, a combined focal length of the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element is f23456, a focal length of the six-piece optical lens system is f, and the following relationship is satisfied: 1.4< | f/| f23456| < 3.2. If | f |/| f23456| satisfies the above relationship, a narrow field of view, a large aperture, high pixels, and low height can be provided, and the resolution can be significantly improved. On the contrary, if | f |/| f23456| is out of the above range, the performance and resolution of the optical lens system of low height are degraded and the yield is low. These effects can be enhanced by the following conditional expressions: 1.8< | f/| f23456| < 3.0.
According to an aspect of the six-piece optical lens system, a combined focal length of the first lens element, the second lens element, and the third lens element is f123, a focal length of the six-piece optical lens system is f, and the following relation is satisfied: 1.0< | f/| f123| < 1.9. If | f |/| f123| satisfies the above relation, a narrow field of view, a large aperture, a high pixel, and a low height can be provided, and the resolution can be significantly improved. On the contrary, if | f |/| f123| exceeds the above range, the performance and resolution of the optical lens system of low height are degraded and the yield is low. These effects can be enhanced by the following conditional expressions: 1.1< | f/| f123| < 1.7. According to an aspect of the six-piece optical lens system, a combined focal length of the first lens element, the second lens element, and the third lens element is f123, a combined focal length of the fourth lens element, the fifth lens element, and the sixth lens element is f456, and the following relational expressions are satisfied: 0.6< | f123|/| f456| < 1.0. If | f123|/| f456| satisfies the above relation, a narrow field of view, a large aperture, high pixels, and low height can be provided, and the resolution can be significantly improved. On the contrary, if | f123|/| f456| exceeds the above range, the performance and resolution of the optical lens system of low height are degraded and the yield is low. These effects can be enhanced by the following conditional expressions: 0.7< | f123|/| f456| < 1.0.
According to another aspect of the six-piece optical lens system, the abbe number of the first lens element is V1, the abbe number of the second lens element is V2, the abbe number of the third lens element is V3, and the following relational expressions are satisfied: 20< V1-V2 <65 and 20< V3-V2 < 65. If V1, V2, and V3 satisfy the above-described relational expressions, the volume of the optical lens system can be reduced, and the image edge can be effectively flattened, thereby improving the image quality of the periphery of the image (i.e., the periphery is dim). In addition, the arrangement of the lens elements is advantageous in that the track length is made short.
The invention will be described in further detail below with reference to the attached drawings, which are only intended to schematically show preferred embodiments according to the invention.
Drawings
The invention may be better understood from the following detailed description of non-limiting embodiments of the invention and from a review of the accompanying drawings, in which:
fig. 1 shows a cross-sectional view of an optical lens system according to a first embodiment of the invention;
FIG. 2 illustrates a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve according to an embodiment of the present invention;
FIG. 3 shows a cross-sectional view of an optical lens system according to a second embodiment of the present invention;
FIG. 4 shows a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve according to a second embodiment of the present invention;
FIG. 5 shows a cross-sectional view of an optical lens system according to a third embodiment of the invention;
FIG. 6 shows a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve according to a third embodiment of the present invention;
FIG. 7 shows a cross-sectional view of an optical lens system according to a fourth embodiment of the invention;
FIG. 8 shows a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve according to a fourth embodiment of the present invention;
FIG. 9 shows a cross-sectional view of an optical lens system according to embodiment five of the present invention;
fig. 10 shows a cross-sectional view of an optical lens system according to embodiment six of the present invention.
Detailed description of the preferred embodiments
The following embodiments of a standard to telephoto lens system of the present invention will be described with reference to the drawings and optical data. The lens system can be applied to high-resolution mobile equipment cameras such as mobile phone cameras. In addition, the arrangement of the lens elements is advantageous in that the total track length is short and sufficient space is provided for an optical filter, such as an IR cut filter, in front of the image sensor.
Example one
Fig. 1 shows a cross-sectional view of a first embodiment of a six-plate optical lens system.
In the first embodiment, the six-piece optical lens system 10 includes, in order from the object side (O) to the image side (I): a first lens element 110 having a positive refractive power, which has a first surface 110a and a second surface 110 b; a second lens element 120 having a negative refractive power, which has a third surface 120a and a fourth surface 120 b; a third lens element 130 having a positive refractive power, which has a fifth surface 130a and a sixth surface 130 b; a diaphragm 100 a; a fourth lens element 140 having a negative refractive power, which has an eighth surface 140a and a ninth surface 140 b; a fifth lens element 150 having a tenth surface 150a and an eleventh surface 150 b; and a sixth lens element 160 having a negative refractive power, which has a twelfth surface 160a and a thirteenth surface 160 b.
Fig. 1 also shows an IR filter 170 having a fourteenth surface 170, a fifteenth surface 170b, and an image sensor surface 180. Table 1-1 shows the radius of curvature (r), thickness or interval (d), refractive index (N), and abbe number (v) of each optical surface of the six-piece optical lens system 10.
TABLE 1-1
Tables 1-2 show aspheric coefficients of each optical surface of the six-piece optical lens system 10, where k denotes a conic constant, and 2, … …, 20 denote higher-order aspheric coefficients. The formula for the aspherical profile is as follows:
x (Y) ((Y2/R)/(I + sqrt (1- (1+ k) × (Y/R)2)) + ∑ I (ai)) Yi, wherein:
x is the height of a tangent plane of a point on the aspheric surface, which is away from the optical axis by a distance Y, relative to the vertex of the aspheric surface;
y is the distance from a point on the aspheric curve to the optical axis;
k is a conic coefficient;
ai is an aspheric coefficient of order i.
Tables 1 to 2
Tables 1-3 show the focal ratio (Fno), focal length (f), field of view (2 ω), (Y), and Track Length (TL) (distance between the first surface and the image surface I) for the six-plate optical lens system 10. The focal length of the first lens element is f1, the combined focal length of the second, third and fourth lens elements is f234, the combined focal length of the second, third, fourth, fifth and sixth lens elements is f23456, the combined focal length of the first, second and third lens elements is f123, and the combined focal length of the fourth, fifth and sixth lens elements is f 456. The abbe number of the first lens element is v1, the abbe number of the second lens element is v2, the abbe number of the third lens element is v3, and the abbe number of the fourth lens element is v 1.
Tables 1 to 3
Reference wavelength D line of 587.6 nm
Referring to tables 1-3, in a first embodiment:
f/f1 is 2.25, so 1.7< f/f1< 2.3;
f/f234 is 2.17, so 0.75< | f |/| f234| <2.4 is satisfied;
f/23456 is 2.89, so 1.8< | f/| f23456| <3.0 is satisfied;
f/f123 is 1.50, so 1.1< | f |/| f123| < 1.7;
f123/f456 is 0.98, so 0.7< | f123|/| f456| <1.0 is satisfied;
V1-V2 is 32.42 and V3-V2 is 32.42, so 20< V1-V2 <65 and 20< V3-V2 <65 are satisfied.
Fig. 2 shows a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve of the first embodiment.
Example two
Fig. 3 shows a cross-sectional view of a first embodiment of a six-plate optical lens system.
In the first embodiment, the six-piece optical lens system 20 includes, in order from the object side (O) to the image side (I): a first lens element 210 having a positive refractive power, which has a first surface 210a and a second surface 210 b; a second lens element 220 having a negative refractive power, which has a third surface 220a and a fourth surface 220 b; a third lens element 230 having a positive refractive power, which has a fifth surface 230a and a sixth surface 230 b; an aperture 200; a fourth lens element 240 having a negative refractive power, which has an eighth surface 240a and a ninth surface 240 b; a fifth lens element 250 having a tenth surface 250a and an eleventh surface 250 b; and a sixth lens element 260 having a negative refractive power, which has a twelfth surface 260a and a thirteenth surface 260 b.
Fig. 3 also shows an IR filter 270 having a fourteenth surface 270a, a fifteenth surface 270b, and an image sensor surface 280. Table 2-1 shows the radius of curvature (r), thickness or interval (d), refractive index (N), and abbe number (v) of each optical surface of the six-piece optical lens system 10.
TABLE 2-1
Table 2-2 shows aspheric coefficients of each optical surface of the six-piece optical lens system 20, where k denotes a conic constant, and 2, … …, 20 denote higher-order aspheric coefficients. The formula for the aspherical profile is as follows:
x (Y) ((Y2/R)/(I + sqrt (1- (1+ k) × (Y/R)2)) + ∑ I (ai)) Yi, wherein:
x is the height of a tangent plane of a point on the aspheric surface, which is away from the optical axis by a distance Y, relative to the vertex of the aspheric surface;
y is the distance from a point on the aspheric curve to the optical axis;
k is a conic coefficient;
ai is an aspheric coefficient of order i.
Tables 2 to 2
Tables 2-3 show the focal ratio (Fno), focal length (f), field of view (2 ω), (Y), and Track Length (TL) (distance between the first surface and the image surface I) for the six-plate optical lens system 20. The focal length of the first lens element is f1, the combined focal length of the second, third and fourth lens elements is f234, the combined focal length of the second, third, fourth, fifth and sixth lens elements is f23456, the combined focal length of the first, second and third lens elements is f123, and the combined focal length of the fourth, fifth and sixth lens elements is f 456. The abbe number of the first lens element is v1, the abbe number of the second lens element is v2, the abbe number of the third lens element is v3, and the abbe number of the fourth lens element is v 1.
Tables 2 to 3
Reference wavelength D line of 587.6 nm
Referring to tables 2-3, in the first embodiment:
f/f1 is 2.20, so 1.7< f/f1< 2.3;
f/f234 is 2.32, so 0.75< | f |/| f234| <2.4 is satisfied;
f/23456 is 2.58, so 1.8< | f/| f23456| < 3.0;
f/f123 is 1.55, so 1.1< | f |/| f123| < 1.7;
f123/f456 is 0.94, so 0.7< | f123|/| f456| <1.0 is satisfied;
V1-V2 is 32.42 and V3-V2 is 32.42, so 20< V1-V2 <65 and 20< V3-V2 <65 are satisfied.
Fig. 4 shows a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve of the second embodiment.
EXAMPLE III
Fig. 5 shows a cross-sectional view of embodiment three of a six-piece optical lens system.
In the first embodiment, the six-piece optical lens system 30 includes, in order from the object side (O) to the image side (I): a first lens element 310 having a positive refractive power, which has a first surface 310a and a second surface 310 b; a second lens element 120 having a negative refractive power, which has a third surface 320a and a fourth surface 320 b; a third lens element 330 having a positive refractive power, which has a fifth surface 330a and a sixth surface 330 b; an aperture 300; a fourth lens element 340 having a negative refractive power, which has an eighth surface 340a and a ninth surface 340 b; a fifth lens element 350 having a tenth surface 350a and an eleventh surface 350 b; and a sixth lens element 360 having a negative refractive power, which has a twelfth surface 360a and a thirteenth surface 360 b.
Fig. 5 also shows an IR filter 370 having a fourteenth surface 370a, a fifteenth surface 370b, and an image sensor surface 380. Table 3-1 shows the radius of curvature (r), thickness or interval (d), refractive index (N), and abbe number (v) of each optical surface of the six-piece optical lens system 30.
TABLE 3-1
Table 3-2 shows aspheric coefficients of each optical surface of the six-piece optical lens system 30, where k denotes a conic constant, and 2, … …, 20 denotes a higher-order aspheric coefficient. The formula for the aspherical profile is as follows:
x (Y) ((Y2/R)/(I + sqrt (1- (1+ k) × (Y/R)2)) + ∑ I (ai)) Yi, wherein:
x is the height of a tangent plane of a point on the aspheric surface, which is away from the optical axis by a distance Y, relative to the vertex of the aspheric surface;
y is the distance from a point on the aspheric curve to the optical axis;
k is a conic coefficient;
ai is an aspheric coefficient of order i.
TABLE 3-2
Tables 3-3 show the focal ratio (Fno), focal length (f), field of view (2 ω), (Y), and Track Length (TL) (distance between the first surface and the image surface I) of the six-plate optical lens system 30. The focal length of the first lens element is f1, the combined focal length of the second, third and fourth lens elements is f234, the combined focal length of the second, third, fourth, fifth and sixth lens elements is f23456, the combined focal length of the first, second and third lens elements is f123, and the combined focal length of the fourth, fifth and sixth lens elements is f 456. The abbe number of the first lens element is v1, the abbe number of the second lens element is v2, the abbe number of the third lens element is v3, and the abbe number of the fourth lens element is v 1.
Tables 3 to 3
Reference wavelength D line of 587.6 nm
Referring to tables 3-3, in the first embodiment:
f/f1 is 1.82, so 1.7< f/f1< 2.3;
f/f234 is 0.91, so 0.75< | f |/| f234| <2.4 is satisfied;
f/23456 is 2.02, so 1.8< | f/| f23456| <3.0 is satisfied;
f/f123 is 1.26, so 1.1< | f |/| f123| < 1.7;
f123/f456 is 0.81, so 0.7< | f123|/| f456| <1.0 is satisfied;
V1-V2 is 34.43 and V3-V2 is 34.43, so 20< V1-V2 <65 and 20< V3-V2 <65 are satisfied.
Fig. 6 shows a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve of example three.
Example four
Fig. 7 shows a cross-sectional view of embodiment four of a six-plate optical lens system.
Referring to fig. 7, the six-piece optical lens system 40 includes, in order from the object side (O) to the image side (I): a first lens element 410 having a positive refractive power, which has a first surface 410a and a second surface 410 b; a second lens element 220 having a negative refractive power, which has a third surface 420a and a fourth surface 420 b; an aperture 400; a third lens element 430 having a positive refractive power, which has a fifth surface 430a and a sixth surface 430 b; a fourth lens element 440 having a negative refractive power, which has an eighth surface 440a and a ninth surface 440 b; a fifth lens element 450 having a tenth surface 450a and an eleventh surface 450 b; and a sixth lens element 460 having a negative refractive power, which has a twelfth surface 460a and a thirteenth surface 460 b.
Fig. 7 also shows an IR filter 170 having a fourteenth surface 470a, a fifteenth surface 470b, and an image sensor surface 480. Table 4-1 shows the radius of curvature (r), thickness or interval (d), refractive index (N), and abbe number (v) of each optical surface of the six-piece optical lens system 40.
TABLE 4-1
Table 4-2 shows aspheric coefficients of each optical surface of the six-piece optical lens system 40, where k denotes a conic constant, and 2, … …, 20 denotes a higher-order aspheric coefficient. The formula for the aspherical profile is as follows:
x (Y) ((Y2/R)/(I + sqrt (1- (1+ k) × (Y/R)2)) + ∑ I (ai)) Yi, wherein:
x is the height of a tangent plane of a point on the aspheric surface, which is away from the optical axis by a distance Y, relative to the vertex of the aspheric surface;
y is the distance from a point on the aspheric curve to the optical axis;
k is a conic coefficient;
ai is an aspheric coefficient of order i.
TABLE 4-2
Tables 4-3 show the focal ratio (Fno), focal length (f), field of view (2 ω), (Y), and Track Length (TL) (distance between the first surface and the image surface I) of the six-plate optical lens system 40. The focal length of the first lens element is f1, the combined focal length of the second, third and fourth lens elements is f234, the combined focal length of the second, third, fourth, fifth and sixth lens elements is f23456, the combined focal length of the first, second and third lens elements is f123, and the combined focal length of the fourth, fifth and sixth lens elements is f 456. The abbe number of the first lens element is v1, the abbe number of the second lens element is v2, the abbe number of the third lens element is v3, and the abbe number of the fourth lens element is v 1.
Tables 4 to 3
Reference wavelength D line of 587.6 nm
Referring to tables 4-3, in the first embodiment:
f/f1 is 1.76, so 1.7< f/f1< 2.3;
f/f234 is 0.80, so 0.75< | f |/| f234| <2.4 is satisfied;
f/23456 is 1.89, so 1.8< | f/| f23456| <3.0 is satisfied;
f/f123 is 1.19, so 1.1< | f |/| f123| < 1.7;
f123/f456 is 0.76, so 0.7< | f123|/| f456| <1.0 is satisfied;
V1-V2 is 34.43 and V3-V2 is 34.43, so 20< V1-V2 <65 and 20< V3-V2 <65 are satisfied.
Fig. 8 shows a longitudinal spherical aberration curve, an astigmatic field curve, and a distortion curve of the fourth embodiment.
According to the above embodiments, the stop is located between the third lens element and the fourth lens element or between the second lens element and the third lens element. These configurations provide a lens system capable of minimizing the total track length of the lens system compared to a lens system having a stop on the object side of the first lens element. However, according to an aspect of the six-piece optical lens system, the stop is located at any position between the first lens element and the fourth lens element, or at the object side of the first lens element.
For example, fig. 9 shows a cross-sectional view of embodiment five of a six-piece optical lens system, wherein a stop 500 is located between the first lens element and the second lens element.
Referring to fig. 9, the six-piece optical lens system 50 includes, in order from the object side (O) to the image side (I): first lens element 510, stop 500, second lens element 520, third lens element 530, fourth lens element 540, fifth lens element 550, and sixth lens element 660.
Fig. 9 also shows an IR filter 170 and an image sensor surface 180.
For another example, fig. 10 shows a cross-sectional view of embodiment six of a six-piece optical lens system, in which the stop 600 is located on the object side of the first lens element.
Referring to fig. 10, the six-piece optical lens system 600 includes, in order from the object side (O) to the image side (I): a stop 600, a first lens element 610, a second lens element 620, a third lens element 630, a fourth lens element 640, a fifth lens element 650, and a sixth lens element 660.
Fig. 10 also shows an IR filter 170 and an image sensor surface 180.
From the term "standard to telephoto lens", it is understood that the lens does not have a wide angle of view, more specifically, the angle of view of the lens is less than 60 °.
Although the lens system according to the present invention is particularly applicable in a mobile phone camera, it can also be applied in a camera in any mobile device such as a tablet type device and a wearable device, which have space limitations but require high quality images at standard to narrow viewing angles. Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (13)
1. A six-piece optical lens system comprising, in order from an object side to an image side:
a first lens element having a positive refractive power, an object-side surface of which is a convex surface, and at least one of an object-side surface and an image-side surface of which is an aspherical surface;
a second lens element having a negative refractive power, an image-side surface of which is concave, and at least one of an object-side surface and an image-side surface of which is aspherical;
a third lens element having a positive refractive power, an object-side surface of which is a convex surface, and at least one of an object-side surface and an image-side surface of which is an aspherical surface;
a fourth lens element having a negative refractive power, an object-side surface of which is a concave surface, and at least one of the object-side surface and the image-side surface of which is an aspherical surface;
a fifth lens element having a concave image-side surface, wherein at least one of an object-side surface and an image-side surface of the fifth lens element is aspheric;
a sixth lens element having a negative refractive power, an image-side surface of which is concave, and at least one of an object-side surface and an image-side surface of which is aspherical, wherein:
the six-piece optical lens system further includes a stop located at an arbitrary position between the object side of the first lens element and the fourth lens element;
the focal length of the six-piece optical lens system is f, the focal length of the first lens element is f1, and the following relation is satisfied: 1.5< f/| f1| < 2.5.
2. A six-piece optical lens system according to claim 1 wherein the focal length f of the six-piece optical lens system, and the focal length f1 of the first lens element, satisfy the following relationship: 1.7< f/| f1| < 2.3.
3. A six-piece optical lens system according to claim 1 wherein the combined focal length of the second, third and fourth lens elements is f234, the focal length of the six-piece optical lens system is f, and the following relationship is satisfied:
0.6<|f|/|f234|<2.6。
4. a six-piece optical lens system according to claim 3 wherein the focal length f of the six-piece optical lens system, and the combined focal length f234 of the second, third and fourth lens elements, satisfy the following relationship: 0.75< | f/| f234| < 2.4.
5. A six-piece optical lens system according to claim 1 wherein the combined focal length of the second, third, fourth, fifth and sixth lens elements is f23456, the focal length of the six-piece optical lens system is f, and the following relationship is satisfied:
1.4<|f|/|f23456|<3.2。
6. a six-piece optical lens system according to claim 5 wherein the focal length f of the six-piece optical lens system, and the combined focal length f23456 of the second, third, fourth, fifth and sixth lens elements, satisfy the following relationship: 1.8< | f/| f23456| < 3.0.
7. A six-piece optical lens system according to claim 1 wherein the combined focal length of the first, second and third lens elements is f123, the focal length of the six-piece optical lens system is f, and the following relationship is satisfied:
1.0<|f|/|f123|<1.9。
8. a six-piece optical lens system according to claim 7 wherein the focal length f of the six-piece optical lens system, and the combined focal length f123 of the first, second and third lens elements, satisfy the following relationship: 1.1< | f/| f123| < 1.7.
9. A six-piece optical lens system as claimed in claim 1 wherein the combined focal length of the first, second and third lens elements is f123 and the combined focal length of the fourth, fifth and sixth lens elements is f456, and the following relationships are satisfied:
0.6<|f123|/|f456|<1.0。
10. the six-piece optical lens system of claim 9 wherein a combined focal length f123 of the first, second and third lens elements and a combined focal length f456 of the fourth, fifth and sixth lens elements satisfy the following relationship: 0.7< | f123|/| f456| < 1.0.
11. The six-piece optical lens system according to any one of claims 1 to 10, wherein the abbe number of the first lens element is V1, the abbe number of the second lens element is V2, and the abbe number of the third lens element is V3, and the following relationship is satisfied:
20< V1-V2 <65 and 20< V3-V2 < 65.
12. A six-piece optical lens system according to any one of claims 1 to 10 wherein the optical stop is located between the third lens element and the fourth lens element.
13. A six-piece optical lens system according to any one of claims 1 to 10 wherein the optical stop is located between the second lens element and the third lens element.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/107739 WO2018098632A1 (en) | 2016-11-29 | 2016-11-29 | Regular-angle to telephoto lens system for taking images |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108431663A CN108431663A (en) | 2018-08-21 |
| CN108431663B true CN108431663B (en) | 2020-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680075772.9A Active CN108431663B (en) | 2016-11-29 | 2016-11-29 | Standard to telephoto lens system for photographing images |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108431663B (en) |
| WO (1) | WO2018098632A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579858A (en) * | 2019-08-12 | 2019-12-17 | 西北大学 | Mobile phone lens and preparation method thereof |
| TWI703364B (en) | 2019-11-29 | 2020-09-01 | 大立光電股份有限公司 | Photographing optical lens assembly and electronic device |
| WO2021207883A1 (en) * | 2020-04-13 | 2021-10-21 | 南昌欧菲精密光学制品有限公司 | Optical system, lens module, and electronic device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8786961B2 (en) * | 2010-07-16 | 2014-07-22 | Konica Minolta Advanced Layers, Inc. | Image pickup lens |
| TWI416163B (en) * | 2011-07-19 | 2013-11-21 | Largan Precision Co Ltd | Optical image capturing lens system |
| WO2013145547A1 (en) * | 2012-03-26 | 2013-10-03 | 富士フイルム株式会社 | Imaging lens and imaging device provided with imaging lens |
| TWI472826B (en) * | 2012-06-06 | 2015-02-11 | Largan Precision Co Ltd | Optical image lens system |
| JP5975386B2 (en) * | 2012-08-17 | 2016-08-23 | 株式会社オプトロジック | Imaging lens |
| TWI467219B (en) * | 2013-11-29 | 2015-01-01 | Largan Precision Co Ltd | Image capturing lens assembly, image capturing device and mobile terminal |
| TWI489132B (en) * | 2014-01-10 | 2015-06-21 | Largan Precision Co Ltd | Imaging lens assembly, imaging device and mobile terminal |
| TWI477807B (en) * | 2014-05-23 | 2015-03-21 | Largan Precision Co Ltd | Photographic optical lens assembly, image capturing unit and mobile device |
| JP2016085390A (en) * | 2014-10-28 | 2016-05-19 | 富士フイルム株式会社 | Imaging lens and imaging device provided with imaging lens |
| CN205581382U (en) * | 2016-02-02 | 2016-09-14 | 广东旭业光电科技股份有限公司 | Optical lens and camera device |
-
2016
- 2016-11-29 CN CN201680075772.9A patent/CN108431663B/en active Active
- 2016-11-29 WO PCT/CN2016/107739 patent/WO2018098632A1/en not_active Ceased
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| Publication number | Publication date |
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| CN108431663A (en) | 2018-08-21 |
| WO2018098632A1 (en) | 2018-06-07 |
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