CN108957703B - Optical image capturing system and image capturing device - Google Patents
Optical image capturing system and image capturing device Download PDFInfo
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- CN108957703B CN108957703B CN201810970099.6A CN201810970099A CN108957703B CN 108957703 B CN108957703 B CN 108957703B CN 201810970099 A CN201810970099 A CN 201810970099A CN 108957703 B CN108957703 B CN 108957703B
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Abstract
The invention discloses an optical image capturing system and an image capturing device. The optical image capturing system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof. The second lens element with positive refractive power has an image-side surface being convex at a paraxial region. The sixth lens element includes at least one convex surface at an off-axis position, and an object-side surface and an image-side surface of the sixth lens element are aspheric. The seventh lens element has a concave image-side surface at the paraxial region and at least one convex surface at the off-axis region, wherein the object-side surface and the image-side surface are aspheric. When a specific condition is satisfied, generation of aberration can be avoided. The invention also discloses an image capturing device with the optical image capturing system.
Description
The present application is a divisional application of patent applications filed on 2015, 30.01, with application number 201510048465.9, entitled "optical image capturing system, image capturing device, and electronic device".
Technical Field
The present invention relates to an optical image capturing system and an image capturing device, and more particularly, to a miniaturized optical image capturing system and an image capturing device applied to an electronic device.
Background
In recent years, with the rise of electronic products having a photographing function, the demand for optical systems has been increasing. The photosensitive elements of a general optical system are not limited to a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS) Sensor, and with the refinement of Semiconductor process technology, the pixel size of the photosensitive elements is reduced, and the optical system gradually develops into a high pixel field, so that the requirements for imaging quality are increased.
The conventional optical system mounted on an electronic product mainly adopts a four-piece or five-piece lens structure, but due to the prevalence of high-specification mobile devices such as Smart phones (Smart phones) and Tablet PCs (Tablet PCs), the pixel and imaging quality of the optical system is rapidly increased, and the known optical system cannot meet the requirement of a higher-order photographing system. In addition, the conventional optical system configured in the vehicle camera device has insufficient resolution, but the known optical system cannot meet the requirement due to the identification of the first image of the vehicle camera device.
At present, although six-piece optical systems are further developed, the configuration of the refractive power of the first lens element cannot effectively slow down incident light and adjust and control the chief ray angle around the imaging surface, so that the optical system cannot show the imaging effect in the environment of a weak light source, resulting in the problem of too dark imaging around the image.
Disclosure of Invention
The present invention is directed to an optical image capturing system and an image capturing device, wherein a first lens element of the optical image capturing system and the image capturing device have negative refractive power, so as to slow down light incidence, so as to adjust and control a main light angle around an image on an image plane, thereby reducing the problem of too dark image around a weak light source. Moreover, the surface shape arrangement of the sixth lens and the seventh lens can improve the peripheral image quality and the relative illumination, and can reduce the manufacturing sensitivity.
The present invention provides an optical image capturing system, including, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof. The second lens element with positive refractive power has an image-side surface being convex at a paraxial region. The sixth lens element includes at least one convex surface at an off-axis position, and an object-side surface and an image-side surface of the sixth lens element are aspheric. The seventh lens element has a concave image-side surface at the paraxial region and at least one convex surface at the off-axis region, wherein the object-side surface and the image-side surface are aspheric. The total number of the lenses in the optical image capturing system is seven, the focal length of the optical image capturing system is f, the radius of curvature of the object-side surface of the first lens element is R1, the vertical distance between the critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, the aperture value of the optical image capturing system is Fno, the sum of the thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element on the optical axis is Σ CT, and the distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element on the optical axis is Td, which satisfies the following conditions:
|f/R1|<1.25；
0.1<Yc62/f<1.0；
fno < 2.0; and
0.55<ΣCT/Td<0.80。
according to the present invention, an image capturing apparatus is further provided, which includes the optical image capturing system as described in the previous paragraph and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an image plane of the optical image capturing system.
The present invention further provides an optical image capturing system, which includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof. The sixth lens element includes at least one convex surface at an off-axis position, and an object-side surface and an image-side surface of the sixth lens element are aspheric. The seventh lens element has a concave image-side surface at the paraxial region and at least one convex surface at the off-axis region, wherein the object-side surface and the image-side surface are aspheric. The total number of the lenses in the optical image capturing system is seven, the focal length of the optical image capturing system is f, the radius of curvature of the object-side surface of the first lens element is R1, the vertical distance between the critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, the aperture value of the optical image capturing system is Fno, the focal length of the sixth lens element is f6, and the focal length of the seventh lens element is f7, which satisfies the following conditions:
|f/R1|<1.25；
0.1<Yc62/f<1.0；
fno < 2.0; and
|f/f6|+|f/f7|<0.55。
according to the present invention, an image capturing apparatus is further provided, which includes the optical image capturing system as described in the previous paragraph and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an image plane of the optical image capturing system.
The present invention further provides an optical image capturing system, which includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof. The sixth lens element includes at least one convex surface at an off-axis position, and an object-side surface and an image-side surface of the sixth lens element are aspheric. The seventh lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof and at least one convex surface at an off-axis region thereof, wherein the object-side surface and the image-side surface of the seventh lens element are aspheric. The total number of the lenses in the optical image capturing system is seven, the focal length of the optical image capturing system is f, the radius of curvature of the object-side surface of the first lens element is R1, the vertical distance between the critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, the aperture value of the optical image capturing system is Fno, the sum of the thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element on the optical axis is Σ CT, and the distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element on the optical axis is Td, which satisfies the following conditions:
|f/R1|<1.0；
0.1<Yc62/f<1.0；
fno < 2.0; and
0.55<ΣCT/Td<0.80。
according to the present invention, an image capturing apparatus is further provided, which includes the optical image capturing system as described in the previous paragraph and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an image plane of the optical image capturing system.
When the | f/R1| satisfies the above condition, the problem of excessive curvature of the object-side surface of the first lens element can be avoided, so as to effectively avoid the generation of aberration when light is incident and facilitate the fabrication of the first lens element.
When the Yc62/f meets the above conditions, the angle of the light incident on the electronic photosensitive element can be effectively suppressed, so that the optical image capturing system can obtain more sensitive sensing.
When Fno satisfies the above conditions, the optical image capturing system has the advantage of large aperture, and can still clearly capture images when the light is insufficient.
When Σ CT/Td satisfies the above condition, the total length can be effectively shortened, and the miniaturization thereof can be maintained.
When the | f/f6| + | f/f7| satisfies the above condition, it is helpful to reduce the manufacturing sensitivity and improve the imaging quality.
Drawings
Fig. 1 is a schematic view illustrating an image capturing apparatus according to a first embodiment of the invention;
FIG. 2 is a graph showing the spherical aberration, astigmatism and distortion of the first embodiment in order from left to right;
FIG. 3 is a schematic view illustrating an image capturing device according to a second embodiment of the present invention;
FIG. 4 is a graph showing the spherical aberration, astigmatism and distortion of the second embodiment in order from left to right;
FIG. 5 is a schematic view illustrating an image capturing apparatus according to a third embodiment of the present invention;
FIG. 6 is a graph showing the spherical aberration, astigmatism and distortion of the third embodiment in order from left to right;
FIG. 7 is a schematic view illustrating an image capturing apparatus according to a fourth embodiment of the present invention;
FIG. 8 is a graph showing the spherical aberration, astigmatism and distortion of the fourth embodiment in order from left to right;
fig. 9 is a schematic view illustrating an image capturing apparatus according to a fifth embodiment of the invention;
FIG. 10 is a graph showing the spherical aberration, astigmatism and distortion of the fifth embodiment in order from left to right;
fig. 11 is a schematic view illustrating an image capturing apparatus according to a sixth embodiment of the invention;
FIG. 12 is a graph showing spherical aberration, astigmatism and distortion curves of the sixth embodiment, in order from left to right;
fig. 13 is a schematic view illustrating an image capturing apparatus according to a seventh embodiment of the invention;
FIG. 14 is a graph showing the spherical aberration, astigmatism and distortion of the seventh embodiment in order from left to right;
FIG. 15 is a diagram illustrating parameters SDmax and SDmin according to the first embodiment of FIG. 1;
FIG. 16 is a diagram illustrating the parameter Yc62 according to the first embodiment of FIG. 1;
FIG. 17 is a schematic view of an electronic device according to an eighth embodiment of the invention;
FIG. 18 is a schematic view of an electronic device according to a ninth embodiment of the invention;
FIG. 19 is a schematic view of an electronic device according to a tenth embodiment of the invention; and
fig. 20 is a schematic view illustrating an auxiliary device for a vehicle according to an eleventh embodiment of the invention.
[ notation ] to show
An electronic device: 10. 20, 30
Auxiliary device for vehicle: 40
An image taking device: 11. 21, 31, 41
A first lens: 110. 210, 310, 410, 510, 610, 710
An object-side surface: 111. 211, 311, 411, 511, 611, 711
Image-side surface: 112. 212, 312, 412, 512, 612, 712
A second lens: 120. 220, 320, 420, 520, 620, 720
An object-side surface: 121. 221, 321, 421, 521, 621, 721
Image-side surface: 122. 222, 322, 422, 522, 622, 722
A third lens: 130. 230, 330, 430, 530, 630, 730
An object-side surface: 131. 231, 331, 431, 531, 631, 731
Image-side surface: 132. 232, 332, 432, 532, 632, 732
A fourth lens: 140. 240, 340, 440, 540, 640, 740
An object-side surface: 141. 241, 341, 441, 541, 641, 741
Image-side surface: 142. 242, 342, 442, 542, 642, 742
A fifth lens: 150. 250, 350, 450, 550, 650, 750
An object-side surface: 151. 251, 351, 451, 551, 651, 751
Image-side surface: 152. 252, 352, 452, 552, 652, 752
A sixth lens: 160. 260, 360, 460, 560, 660, 760
An object-side surface: 161. 261, 361, 461, 561, 661, 761
Image-side surface: 162. 262, 362, 462, 562, 662, 762
A seventh lens: 170. 270, 370, 470, 570, 670, 770
An object-side surface: 171. 271, 371, 471, 571, 671, 771
Image-side surface: 172. 272, 372, 472, 572, 672, 772
Infrared ray filtering filter element: 180. 280, 380, 480, 580, 680, 780
Imaging surface: 190. 290, 390, 490, 590, 690, 790
An electron-sensitive element: 195. 295, 395, 495, 595, 695, 795
f: focal length of optical image capturing system
Fno: aperture value of optical image capturing system
HFOV: half of maximum viewing angle in optical image capturing system
Cra (ymax): chief ray angle of maximum image height on imaging surface of optical image capturing system
T23: the distance between the second lens and the third lens on the optical axis
T67: the distance between the sixth lens and the seventh lens on the optical axis
CT 1: thickness of the first lens on the optical axis
CT 2: thickness of the second lens on the optical axis
CT 3: thickness of the third lens on the optical axis
CT 4: thickness of the fourth lens on the optical axis
CT 5: thickness of the fifth lens element on the optical axis
CT 6: thickness of the sixth lens element on the optical axis
CT 7: thickness of the seventh lens element on the optical axis
Td: the distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis
SDmax: maximum effective radii of object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth, and seventh lenses
SDmin: minimum effective radii of object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth, and seventh lenses
R1: radius of curvature of object-side surface of first lens
R12: radius of curvature of image-side surface of sixth lens element
R14: radius of curvature of image-side surface of seventh lens
Yc 62: the vertical distance between the critical point of the image-side surface of the sixth lens element and the optical axis
f 45: the combined focal length of the fourth lens and the fifth lens
f 6: focal length of sixth lens
f 7: focal length of seventh lens
ff: the combined focal length of all the lenses with refractive power between the object and the aperture
fr: the combined focal length of all the lenses with refractive power between the aperture and the image plane
Detailed Description
An optical image capturing system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, wherein the number of the lens elements having refractive power in the optical image capturing system is seven, and no relative movement exists between the lens elements having refractive power.
The first lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof. Therefore, the incidence of light rays can be slowed down, so that the main light ray angle of the periphery of the image on the imaging surface is regulated and controlled, and the problem that the periphery of the image is too dark under the weak light source environment is favorably solved.
The second lens element with positive refractive power can provide the main positive refractive power for the optical image capturing system, thereby contributing to shortening the total track length.
The third lens element with positive refractive power can reduce the total track length of the optical image capturing system and maintain its miniaturization.
The fourth lens element with negative refractive power can correct aberration of the optical imaging system.
The fifth lens element has positive refractive power, thereby reducing the sensitivity of the optical imaging system. In addition, the fifth lens and the fourth lens can be bonded, so that the manufacturability and the environmental resistance effect are improved.
The image side surface of the sixth lens element is concave at the paraxial region and comprises at least one convex surface at the off-axis region, so that the angle of incidence of the off-axis field rays can be effectively suppressed, and the response efficiency of the electronic photosensitive element is improved.
The seventh lens element can have an object-side surface being convex at a paraxial region and comprising at least one concave surface at an off-axis region, and an image-side surface being concave at a paraxial region and comprising at least one convex surface at an off-axis region. Therefore, the problems of peripheral image quality and relative illumination can be improved, and the manufacturing sensitivity is reduced.
The focal length of the optical image capturing system is f, and the radius of curvature of the object-side surface of the first lens element is R1, which satisfies the following condition: i f/R1| < 1.25. Therefore, the problem of overlarge curvature of the object-side surface of the first lens can be avoided, so that aberration is effectively avoided when light enters, and the first lens is favorably manufactured. Preferably, the following conditions are satisfied: i f/R1| < 1.0.
A radius of curvature of the image-side surface of the sixth lens element is R12, and a radius of curvature of the image-side surface of the seventh lens element is R14, where the following conditions are satisfied: 0< R12/R14. Therefore, the curvature arrangement of the image side surfaces of the sixth lens and the seventh lens is beneficial to reducing the manufacturing sensitivity.
The optical image capturing system has a focal length f, and a vertical distance Yc62 between a critical point on the image-side surface of the sixth lens element and the optical axis, wherein the following conditions are satisfied: 0.1< Yc62/f < 1.0. Therefore, the angle of the light incident on the electronic photosensitive element can be effectively suppressed, and the optical image capturing system can obtain more sensitive induction.
Half of the maximum viewing angle in the optical imaging system is HFOV, which satisfies the following conditions: HFOV <35 degrees. Therefore, the optical lens has a proper field angle and an image capturing range, and stray light is avoided.
The optical image capturing system has a focal length f, and the curvature radius of the image-side surface of the seventh lens element is R14, which satisfies the following conditions: 1.5< f/R14. Therefore, the manufacturing sensitivity can be effectively reduced.
The focal length of the optical image capturing system is f, the focal length of the sixth lens element is f6, and the focal length of the seventh lens element is f7, which satisfy the following conditions: i f/f6| + | f/f7| < 0.75. Therefore, the manufacturing sensitivity is reduced, and the imaging quality is improved. Preferably, the following conditions are satisfied: i f/f6| + | f/f7| < 0.55.
The thickness of the sixth lens element along the optical axis is CT6, the thickness of the seventh lens element along the optical axis is CT7, and the distance between the sixth lens element and the seventh lens element along the optical axis is T67, which satisfies the following conditions: 1.75< (CT6+ CT 7)/T67. Therefore, the manufacturing and the assembly of the lens are facilitated.
The aperture value of the optical image capturing system is Fno, which satisfies the following condition: fno < 2.0. Therefore, the optical image capturing system has the advantage of large aperture and can still clearly capture images when the light is insufficient.
The combined focal length of the fourth lens and the fifth lens is f45, which satisfies the following condition: 0< f 45. Therefore, the sensitivity of the optical image capturing system is favorably reduced.
The total of the thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element on the optical axis is Σ CT, and the distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element on the optical axis is Td, which satisfies the following condition: 0.55< Σ CT/Td < 0.80. Therefore, the total length can be effectively shortened, and the miniaturization of the device can be maintained.
A maximum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth, and seventh lenses is SDmax, and a minimum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth, and seventh lenses is SDmin, which satisfies the following conditions: SDmax/SDmin < 2.25. Therefore, the angle of the light rays incident or emergent on the surface of each lens is gentle, the possibility of stray light rays generated by reflection of the light rays is reduced, the imaging quality is further improved, and the lenses are easy to assemble due to the fact that the outer diameters of the lenses are close.
The second lens element is spaced from the third lens element by an optical distance T23, and the second lens element has an optical thickness CT2, which satisfies the following conditions: T23/CT2< 0.50. Thereby, the manufacture and the assembly of the lens are facilitated.
The chief ray angle of the maximum image height on the imaging surface of the optical image capturing system is CRA (Ymax), which satisfies the following conditions: cra (ymax) <15 degrees. Therefore, the angle of the light incident on the electronic photosensitive element can be effectively controlled, the response efficiency of the photosensitive element is improved, and the imaging quality is further improved.
The optical image capturing system may further include an aperture stop, wherein a composite focal length of all the lenses with refractive power between the object and the aperture stop is ff, and a composite focal length of all the lenses with refractive power between the aperture stop and the image plane is fr, which satisfies the following conditions: 3.0< | ff/fr |. Therefore, the refractive power distribution of the lenses at the two sides of the aperture can be properly adjusted, so that the optical image capturing system can effectively correct aberration and distortion under the condition of a large aperture.
In the optical image capturing system provided by the present invention, the lens may be made of plastic or glass. When the lens is made of plastic, the production cost can be effectively reduced. In addition, when the lens is made of glass, the degree of freedom of the refractive power configuration of the optical image capturing system can be increased. In addition, the object side surface and the image side surface of the optical image capturing system can be Aspheric Surfaces (ASP), which can be easily made into shapes other than spherical surfaces to obtain more control variables for reducing the aberration and further reducing the number of lenses, thereby effectively reducing the total length of the optical image capturing system.
In addition, in the optical image capturing system provided by the present invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at a position near the optical axis; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at the paraxial region. In the optical image capturing system provided by the present invention, if the lens element has positive refractive power or negative refractive power, or the focal length of the lens element, the refractive power or the focal length of the lens element at the paraxial region of the lens element is referred to.
In the optical image capturing system provided by the invention, the Critical Point (Critical Point) is a tangent Point which is tangent to a tangent plane perpendicular to the optical axis except for the intersection Point of the Critical Point and the optical axis on the surface of the lens.
In addition, in the optical image capturing system of the invention, at least one diaphragm can be arranged according to requirements to reduce stray light, which is beneficial to improving the image quality.
The image plane of the optical image capturing system of the present invention may be a plane or a curved plane with any curvature, especially a curved plane with a concave surface facing the object side, depending on the difference of the corresponding electronic photosensitive elements.
In the optical image capturing system of the present invention, the aperture may be a front aperture or a middle aperture, wherein the front aperture means that the aperture is disposed between the object and the first lens, and the middle aperture means that the aperture is disposed between the first lens and the image plane. If the diaphragm is a front diaphragm, a longer distance can be generated between an Exit Pupil (Exit Pupil) of the optical image capturing system and an imaging surface, so that the optical image capturing system has a Telecentric (telecentricity) effect, and the image receiving efficiency of a CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor) of the electronic photosensitive element can be increased; if the aperture is arranged in the middle, the field angle of the system is favorably enlarged, and the optical image capturing system has the advantage of a wide-angle lens.
The invention can also be applied to electronic devices such as three-dimensional (3D) image acquisition, digital cameras, mobile products, tablet computers, smart televisions, network monitoring equipment, motion sensing game machines, vehicle auxiliary devices (such as automobile recorders and backing developing devices), industrial robots, wearable products and the like in many aspects.
The invention further provides an image capturing device, comprising the optical image capturing system and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on an imaging surface of the optical image capturing system. The first lens element with negative refractive power in the optical image capturing system can slow down the incidence of light to regulate and control the main light angle around the image on the imaging surface, which is beneficial to reducing the problem of too dark image around the weak light source environment. Moreover, the surface shape arrangement of the sixth lens and the seventh lens can improve the peripheral image quality and the relative illumination, and can reduce the manufacturing sensitivity. Preferably, the image capturing device may further include a Barrel (Barrel Member), a Holder (Holder Member), or a combination thereof.
The invention provides an electronic device comprising the image capturing device. Therefore, the imaging quality is improved. Preferably, the electronic device may further include a Control Unit (Control Unit), a Display Unit (Display), a Storage Unit (Storage Unit), a Random Access Memory (RAM), or a combination thereof.
The following provides a detailed description of the embodiments with reference to the accompanying drawings.
< first embodiment >
Referring to fig. 1 and fig. 2, wherein fig. 1 is a schematic diagram of an image capturing device according to a first embodiment of the invention, and fig. 2 is a graph of spherical aberration, astigmatism and distortion of the first embodiment in order from left to right. As shown in fig. 1, the image capturing device of the first embodiment includes an optical image capturing system (not shown) and an electronic photosensitive element 195. The optical image capturing system sequentially includes, from an object side to an image side, a first lens element 110, a second lens element 120, a third lens element 130, an aperture stop 100, a fourth lens element 140, a fifth lens element 150, a sixth lens element 160, a seventh lens element 170, an ir-cut filter element 180, and an image plane 190, and the electronic photosensitive element 195 is disposed on the image plane 190 of the optical image capturing system, wherein the number of the lens elements with refractive power in the optical image capturing system is seven (110-.
The first lens element 110 with negative refractive power has an object-side surface 111 being convex in a paraxial region thereof and an image-side surface 112 being concave in a paraxial region thereof.
The second lens element 120 with negative refractive power has an object-side surface 121 being concave in a paraxial region thereof and an image-side surface 122 being convex in a paraxial region thereof.
The third lens element 130 with positive refractive power has an object-side surface 131 being convex in a paraxial region thereof and an image-side surface 132 being convex in a paraxial region thereof.
The fourth lens element 140 with negative refractive power has an object-side surface 141 being convex in a paraxial region thereof and an image-side surface 142 being concave in a paraxial region thereof.
The fifth lens element 150 with positive refractive power has an object-side surface 151 being convex in a paraxial region thereof and an image-side surface 152 being convex in a paraxial region thereof.
The sixth lens element 160 with negative refractive power has an object-side surface 161 being convex in a paraxial region thereof and an image-side surface 162 being concave in a paraxial region thereof. In addition, the sixth lens element has an image-side surface 162 with at least one convex surface in an off-axis direction.
The seventh lens element 170 with negative refractive power has an object-side surface 171 being convex in a paraxial region thereof and an image-side surface 172 being concave in a paraxial region thereof. In addition, the seventh lens element has an object-side surface 171 with at least one concave surface disposed off-axis and an image-side surface 172 with at least one convex surface disposed off-axis.
The IR-cut filter 180 is made of glass, and is disposed between the seventh lens element 170 and the image plane 190 without affecting the focal length of the optical image capturing system.
The curve equation of the aspherical surface of each lens described above is as follows:
wherein:
x: the distance between the point on the aspheric surface, which is Y from the optical axis, and the relative distance between the point and the tangent plane of the intersection point tangent to the aspheric surface optical axis;
y: the perpendicular distance between a point on the aspheric curve and the optical axis;
r: a radius of curvature;
k: the cone coefficient; and
ai: the ith order aspheric coefficients.
In the optical image capturing system of the first embodiment, the focal length of the optical image capturing system is f, the aperture value (f-number) of the optical image capturing system is Fno, and half of the maximum viewing angle in the optical image capturing system is HFOV, and the values thereof are as follows: f is 5.68 mm; fno 1.90; and HFOV 28.3 degrees.
In the optical image capturing system of the first embodiment, a chief ray angle of a maximum image height on the image plane 190 of the optical image capturing system is cra (ymax), which satisfies the following conditions: cra (ymax) 11.09 degrees.
In the optical image capturing system of the first embodiment, the distance between the second lens element 120 and the third lens element 130 on the optical axis is T23, and the thickness of the second lens element 120 on the optical axis is CT2, which satisfies the following conditions: T23/CT2 is 0.03.
In the optical image capturing system of the first embodiment, the thickness of the sixth lens element 160 on the optical axis is CT6, the thickness of the seventh lens element 170 on the optical axis is CT7, and the distance between the sixth lens element 160 and the seventh lens element 170 on the optical axis is T67, which satisfies the following conditions: (CT6+ CT7)/T67 is 14.63.
In the optical image capturing system of the first embodiment, the optical axis thickness of the first lens element 110 is CT1, the optical axis thickness of the second lens element 120 is CT2, the optical axis thickness of the third lens element 130 is CT3, the optical axis thickness of the fourth lens element 140 is CT4, the optical axis thickness of the fifth lens element 150 is CT5, the optical axis thickness of the sixth lens element 160 is CT6, and the optical axis thickness of the seventh lens element 170 is CT7, the total thickness of the respective optical axes of the seven lens elements (110-: Σ CT/Td is 0.68.
Referring to fig. 15, a diagram of parameters SDmax and SDmin according to the first embodiment of fig. 1 is shown. As can be seen from fig. 15, the maximum effective radius of the object-side surfaces and the image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses 110, 120, 150, 160 and 170 is SDmax (in the first embodiment, SDmax is located on the first lens object-side surface 111), and the minimum effective radius of the object-side surfaces and the image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses 110, 120, 130, 140, 150, 160 and 170 is SDmin (in the first embodiment, SDmin is located on the fourth lens object-side surface 141), which satisfies the following conditions: SDmax/SDmin is 2.05.
In the optical image capturing system of the first embodiment, the curvature radius of the image-side surface 162 of the sixth lens element is R12, and the curvature radius of the image-side surface 172 of the seventh lens element is R14, which satisfy the following conditions: R12/R14 ═ 3.88.
In the optical image capturing system of the first embodiment, a focal length of the optical image capturing system is f, a radius of curvature of the object-side surface 111 of the first lens element is R1, and a radius of curvature of the image-side surface 172 of the seventh lens element is R14, which satisfy the following conditions: 0.62, | f/R1 |; and f/R14 ═ 2.62.
Referring to FIG. 16, a diagram of the parameter Yc62 according to the first embodiment of FIG. 1 is shown. In fig. 16, the focal length of the optical image capturing system is f, and the vertical distance between the critical point of the image-side surface 162 of the sixth lens element and the optical axis is Yc62, which satisfies the following condition: yc62/f is 0.28.
In the optical image capturing system of the first embodiment, a focal length of the optical image capturing system is f, a focal length of the sixth lens element 160 is f6, and a focal length of the seventh lens element 170 is f7, which satisfies the following conditions: i f/f6| + | f/f7| -0.18.
In the optical image capturing system of the first embodiment, a combined focal length of the fourth lens element 140 and the fifth lens element 150 is f45, which satisfies the following condition: f45 ═ 28.50.
In the optical image capturing system of the first embodiment, a composite focal length of all the lenses with refractive power between the object and the stop 100 (the first lens element 110, the second lens element 120, and the third lens element 130 in the first embodiment) is ff, and a composite focal length of all the lenses with refractive power between the stop 100 and the image plane 190 (the fourth lens element 140, the fifth lens element 150, the sixth lens element 160, and the seventh lens element 170 in the first embodiment) is fr, which satisfies the following conditions: and 0.001 for ff/fr.
The following list I and list II are referred to cooperatively.
In table one, the detailed structural data of the first embodiment of fig. 1 are shown, wherein the units of the radius of curvature, the thickness and the focal length are mm, and the surfaces 0-18 sequentially represent the surfaces from the object side to the image side. Table II shows aspheric data of the first embodiment, where k represents the cone coefficients in the aspheric curve equation, and A4-A14 represents the 4 th to 14 th order aspheric coefficients of each surface. In addition, the following tables of the embodiments correspond to the schematic diagrams and aberration graphs of the embodiments, and the definitions of the data in the tables are the same as those of the first and second tables of the first embodiment, which is not repeated herein.
< second embodiment >
Referring to fig. 3 and fig. 4, wherein fig. 3 is a schematic diagram of an image capturing device according to a second embodiment of the invention, and fig. 4 is a graph of spherical aberration, astigmatism and distortion of the second embodiment in order from left to right. As shown in fig. 3, the image capturing apparatus of the second embodiment includes an optical image capturing system (not shown) and an electronic photosensitive element 295. The optical image capturing system sequentially includes, from an object side to an image side, a first lens element 210, a second lens element 220, an aperture stop 200, a third lens element 230, a fourth lens element 240, a fifth lens element 250, a sixth lens element 260, a seventh lens element 270, an ir-cut filter 280 and an image plane 290, and the electronic sensing element 295 is disposed on the image plane 290 of the optical image capturing system, wherein the number of the lens elements with refractive power in the optical image capturing system is seven (210 and 270), and the lens elements with refractive power do not move relative to each other.
The first lens element 210 with negative refractive power has an object-side surface 211 being convex in a paraxial region thereof and an image-side surface 212 being concave in a paraxial region thereof.
The second lens element 220 with positive refractive power has an object-side surface 221 being convex in a paraxial region thereof and an image-side surface 222 being planar in a paraxial region thereof.
The third lens element 230 with positive refractive power has an object-side surface 231 being convex in a paraxial region thereof and an image-side surface 232 being convex in a paraxial region thereof.
The fourth lens element 240 with negative refractive power has an object-side surface 241 being concave in a paraxial region thereof and an image-side surface 242 being concave in a paraxial region thereof, wherein the fourth lens element 242 is bonded to the fifth lens element 250.
The fifth lens element 250 with positive refractive power has an object-side surface 251 being convex in a paraxial region thereof and an image-side surface 252 being convex in a paraxial region thereof, wherein the fifth lens element 251 is bonded to the fourth lens element image-side surface 242.
The sixth lens element 260 with negative refractive power has an object-side surface 261 being convex in a paraxial region thereof and an image-side surface 262 being concave in a paraxial region thereof. In addition, the image-side surface 262 of the sixth lens element includes at least one convex surface at an off-axis position.
The seventh lens element 270 with positive refractive power has an object-side surface 271 being convex in a paraxial region thereof and an image-side surface 272 being concave in a paraxial region thereof. In addition, the seventh lens element has an object-side surface 271 with at least one concave surface disposed off-axis and an image-side surface 272 with at least one convex surface disposed off-axis.
The ir-cut filter 280 is made of glass, and is disposed between the seventh lens element 270 and the image plane 290 without affecting the focal length of the optical image capturing system.
See also table three and table four below.
In the second embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.
The following data can be calculated by matching table three and table four:
< third embodiment >
Referring to fig. 5 and fig. 6, wherein fig. 5 is a schematic diagram of an image capturing apparatus according to a third embodiment of the present invention, and fig. 6 is a graph of spherical aberration, astigmatism and distortion of the third embodiment in order from left to right. As shown in fig. 5, the image capturing device of the third embodiment includes an optical image capturing system (not shown) and an electronic photosensitive element 395. The image capturing optical system includes, in order from an object side to an image side, a first lens element 310, a second lens element 320, an aperture stop 300, a third lens element 330, a fourth lens element 340, a fifth lens element 350, a sixth lens element 360, a seventh lens element 370, an ir-cut filter 380 and an image plane 390, and the electronic sensing element 395 is disposed on the image plane 390 of the image capturing optical system, wherein the number of the lens elements with refractive power in the image capturing optical system is seven (310 and 370), and the lens elements with refractive power do not move relative to each other.
The first lens element 310 with negative refractive power has an object-side surface 311 being planar in a paraxial region thereof and an image-side surface 312 being concave in a paraxial region thereof.
The second lens element 320 with positive refractive power has an object-side surface 321 being convex in a paraxial region thereof and an image-side surface 322 being convex in a paraxial region thereof.
The third lens element 330 with positive refractive power has an object-side surface 331 being convex in a paraxial region thereof and an image-side surface 332 being concave in a paraxial region thereof.
The fourth lens element 340 with negative refractive power has an object-side surface 341 being concave in a paraxial region thereof and an image-side surface 342 being concave in a paraxial region thereof, wherein the fourth lens element 342 is bonded to the fifth lens element 350.
The fifth lens element 350 with positive refractive power has an object-side surface 351 being convex in a paraxial region thereof and an image-side surface 352 being convex in a paraxial region thereof, wherein the fifth lens element 351 is bonded to the image-side surface 342 of the fourth lens element.
The sixth lens element 360 with negative refractive power has an object-side surface 361 being convex in a paraxial region thereof and an image-side surface 362 being concave in a paraxial region thereof. In addition, the sixth lens element image-side surface 362 includes at least one convex surface at an off-axis position.
The seventh lens element 370 with positive refractive power has an object-side surface 371 being convex in a paraxial region thereof and an image-side surface 372 being concave in a paraxial region thereof. In addition, the seventh lens element object-side surface 371 includes at least one concave surface in an off-axis direction, and the seventh lens element image-side surface 372 includes at least one convex surface in an off-axis direction.
The ir-cut filter 380 is made of glass, and is disposed between the seventh lens element 370 and the image plane 390 without affecting the focal length of the optical image capturing system.
See also table five and table six below.
In the third embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.
The following data can be derived by matching table five and table six:
< fourth embodiment >
Referring to fig. 7 and 8, wherein fig. 7 is a schematic diagram of an image capturing apparatus according to a fourth embodiment of the invention, and fig. 8 is a graph of spherical aberration, astigmatism and distortion of the fourth embodiment in order from left to right. As shown in fig. 7, the image capturing device of the fourth embodiment includes an optical image capturing system (not numbered) and an electro-optic sensor 495. The optical image capturing system includes, in order from an object side to an image side, a first lens element 410, a second lens element 420, an aperture stop 400, a third lens element 430, a fourth lens element 440, a fifth lens element 450, a sixth lens element 460, a seventh lens element 470, an ir-cut filter 480 and an image plane 490, and the electro-optic sensor 495 is disposed on the image plane 490, wherein the number of the lens elements with refractive power in the optical image capturing system is seven (410-.
The first lens element 410 with negative refractive power has an object-side surface 411 being convex in a paraxial region thereof and an image-side surface 412 being concave in a paraxial region thereof.
The second lens element 420 with positive refractive power has an object-side surface 421 being convex in a paraxial region thereof and an image-side surface 422 being planar in a paraxial region thereof.
The third lens element 430 with positive refractive power has an object-side surface 431 being convex in a paraxial region thereof and an image-side surface 432 being convex in a paraxial region thereof.
The fourth lens element 440 with negative refractive power has an object-side surface 441 being concave in a paraxial region thereof and an image-side surface 442 being concave in a paraxial region thereof, wherein the fourth lens element 442 is bonded to the fifth lens element 450.
The fifth lens element 450 with positive refractive power has an object-side surface 451 being convex in a paraxial region thereof and an image-side surface 452 being convex in a paraxial region thereof, wherein the fifth lens element 451 and the fourth lens element 442 are bonded together.
The sixth lens element 460 with negative refractive power has an object-side surface 461 being convex in a paraxial region thereof and an image-side surface 462 being concave in a paraxial region thereof. In addition, the sixth lens element image-side surface 462 includes at least one convex surface at an off-axis position.
The seventh lens element 470 with positive refractive power has an object-side surface 471 being convex in a paraxial region thereof and an image-side surface 472 being concave in a paraxial region thereof. In addition, the seventh lens element has an object-side surface 471 with at least one concave surface located off-axis and an image-side surface 472 with at least one convex surface located off-axis.
The ir-cut filter 480 is made of glass, and is disposed between the seventh lens element 470 and the image plane 490 without affecting the focal length of the optical image capturing system.
See table seven below in conjunction with table eight.
In the fourth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.
The following data can be derived by matching table seven and table eight:
< fifth embodiment >
Referring to fig. 9 and 10, fig. 9 is a schematic diagram illustrating an image capturing device according to a fifth embodiment of the invention, and fig. 10 is a graph illustrating spherical aberration, astigmatism and distortion of the fifth embodiment in order from left to right. As shown in fig. 9, the image capturing device of the fifth embodiment includes an optical image capturing system (not shown) and an electronic photosensitive element 595. The image capturing optical system includes, in order from an object side to an image side, a first lens element 510, a second lens element 520, an aperture stop 500, a third lens element 530, a fourth lens element 540, a fifth lens element 550, a sixth lens element 560, a seventh lens element 570, an ir-cut filter 580, and an image plane 590, and the electro-optic sensor 595 is disposed on the image plane 590 of the image capturing optical system, wherein the number of the lens elements with refractive power in the image capturing optical system is seven (510 and 570), and the lens elements with refractive power do not move relative to each other.
The first lens element 510 with negative refractive power has an object-side surface 511 being planar in a paraxial region thereof and an image-side surface 512 being concave in a paraxial region thereof.
The second lens element 520 with positive refractive power has an object-side surface 521 being convex in a paraxial region thereof and an image-side surface 522 being convex in a paraxial region thereof.
The third lens element 530 with positive refractive power has an object-side surface 531 being convex in a paraxial region thereof and an image-side surface 532 being convex in a paraxial region thereof.
The fourth lens element 540 with negative refractive power has an object-side surface 541 being concave in a paraxial region thereof and an image-side surface 542 being concave in a paraxial region thereof.
The fifth lens element 550 with positive refractive power has an object-side surface 551 being convex in a paraxial region thereof and an image-side surface 552 being convex in a paraxial region thereof.
The sixth lens element 560 with negative refractive power has an object-side surface 561 being concave in a paraxial region thereof and an image-side surface 562 being concave in a paraxial region thereof. In addition, the sixth lens element side surface 562 comprises at least one convex surface off-axis.
The seventh lens element 570 with positive refractive power has an object-side surface 571 being convex in a paraxial region thereof and an image-side surface 572 being concave in the paraxial region thereof. In addition, the seventh lens element object-side surface 571 includes at least one concave surface in a direction away from the axis, and the seventh lens element image-side surface 572 includes at least one convex surface in a direction away from the axis.
The ir-cut filter 580 is made of glass, and is disposed between the seventh lens element 570 and the image plane 590 without affecting the focal length of the optical image capturing system.
The following table nine and table ten are referred to cooperatively.
In the fifth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.
The following data can be derived from tables nine and ten:
< sixth embodiment >
Referring to fig. 11 and 12, wherein fig. 11 is a schematic diagram illustrating an image capturing device according to a sixth embodiment of the invention, and fig. 12 is a graph illustrating spherical aberration, astigmatism and distortion in the sixth embodiment from left to right. As shown in fig. 11, the image capturing device of the sixth embodiment includes an optical image capturing system (not shown) and an electronic photosensitive element 695. The optical image capturing system includes, in order from an object side to an image side, a first lens element 610, a second lens element 620, a third lens element 630, an aperture stop 600, a fourth lens element 640, a fifth lens element 650, a sixth lens element 660, a seventh lens element 670, an ir-cut filter 680 and an image plane 690, and an electronic sensing element 695 is disposed on the image plane 690 of the optical image capturing system, wherein the number of the lens elements with refractive power in the optical image capturing system is seven (610 and 670), and the lens elements with refractive power do not move relative to each other.
The first lens element 610 with negative refractive power has an object-side surface 611 being convex in a paraxial region thereof and an image-side surface 612 being concave in the paraxial region thereof.
The second lens element 620 with negative refractive power has an object-side surface 621 being concave in a paraxial region thereof and an image-side surface 622 being convex in a paraxial region thereof.
The third lens element 630 with positive refractive power has an object-side surface 631 being convex in a paraxial region thereof and an image-side surface 632 being convex in a paraxial region thereof.
The fourth lens element 640 with negative refractive power has an object-side surface 641 being convex in a paraxial region thereof and an image-side surface 642 being concave in a paraxial region thereof.
The fifth lens element 650 with positive refractive power has an object-side surface 651 being convex in a paraxial region thereof and an image-side surface 652 being convex in a paraxial region thereof.
The sixth lens element 660 with negative refractive power has an object-side surface 661 being convex in a paraxial region thereof and an image-side surface 662 being concave in a paraxial region thereof. In addition, the sixth lens element image-side surface 662 includes at least one convex surface at an off-axis position.
The seventh lens element 670 with positive refractive power has an object-side surface 671 being convex in a paraxial region thereof and an image-side surface 672 being concave in the paraxial region thereof. In addition, the seventh lens element has an object-side surface 671 with at least one concave surface disposed off-axis and an image-side surface 672 with at least one convex surface disposed off-axis.
The ir-cut filter 680 is made of glass, and is disposed between the seventh lens element 670 and the image plane 690 without affecting the focal length of the optical image capturing system.
See also the following table eleven and table twelve.
In the sixth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.
The following data can be derived from table eleven and table twelve:
< seventh embodiment >
Referring to fig. 13 and 14, wherein fig. 13 is a schematic diagram of an image capturing apparatus according to a seventh embodiment of the invention, and fig. 14 is a graph of spherical aberration, astigmatism and distortion of the seventh embodiment sequentially from left to right. As shown in fig. 13, the image capturing device of the seventh embodiment includes an optical image capturing system (not shown) and an electronic photosensitive element 795. The optical image capturing system includes, in order from an object side to an image side, a first lens element 710, a second lens element 720, a third lens element 730, an aperture stop 700, a fourth lens element 740, a fifth lens element 750, a sixth lens element 760, a seventh lens element 770, an ir-cut filter 780, and an image plane 790, and the electronic sensing element 795 is disposed on the image plane 790 of the optical image capturing system, wherein the number of the lens elements with refractive power in the optical image capturing system is seven (710-.
The first lens element 710 with negative refractive power has an object-side surface 711 being convex in a paraxial region thereof and an image-side surface 712 being concave in a paraxial region thereof.
The second lens element 720 with positive refractive power has an object-side surface 721 being concave in a paraxial region thereof and an image-side surface 722 being convex in a paraxial region thereof.
The third lens element 730 with positive refractive power has an object-side surface 731 being convex in a paraxial region thereof and an image-side surface 732 being convex in a paraxial region thereof.
The fourth lens element 740 with negative refractive power has an object-side surface 741 being convex in a paraxial region thereof and an image-side surface 742 being concave in a paraxial region thereof.
The fifth lens element 750 with positive refractive power has an object-side surface 751 being convex in a paraxial region thereof and an image-side surface 752 being convex in a paraxial region thereof.
The sixth lens element 760 with positive refractive power has an object-side surface 761 being convex in a paraxial region thereof and an image-side surface 762 being concave in a paraxial region thereof. In addition, the sixth lens element includes at least one convex surface on the image-side surface 762 off-axis.
The seventh lens element 770 with negative refractive power has an object-side surface 771 being convex in a paraxial region thereof and an image-side surface 772 being concave in a paraxial region thereof. In addition, the seventh lens element object-side surface 771 includes at least one concave surface off-axis and the seventh lens element image-side surface 772 includes at least one convex surface off-axis.
The ir-cut filter 780 is made of glass, and disposed between the seventh lens element 770 and the image plane 790 without affecting the focal length of the optical image capturing system.
Reference is made to the following thirteen and fourteen tables.
In the seventh embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.
The following data can be derived from table thirteen and table fourteen:
< eighth embodiment >
Fig. 17 is a schematic diagram illustrating an electronic device 10 according to an eighth embodiment of the invention. The electronic device 10 of the eighth embodiment is a smart phone, and the electronic device 10 includes an image capturing device 11, where the image capturing device 11 includes an optical image capturing system (not shown) and an electronic photosensitive element (not shown) according to the invention, where the electronic photosensitive element is disposed on an image plane of the optical image capturing system.
< ninth embodiment >
Fig. 18 is a schematic view illustrating an electronic device 20 according to a ninth embodiment of the invention. The electronic device 20 of the ninth embodiment is a tablet computer, and the electronic device 20 includes an image capturing device 21, and the image capturing device 21 includes an optical image capturing system (not shown) and an electronic photosensitive element (not shown) according to the present invention, wherein the electronic photosensitive element is disposed on an image plane of the optical image capturing system.
< tenth embodiment >
Fig. 19 is a schematic diagram illustrating an electronic device 30 according to a tenth embodiment of the invention. The electronic device 30 of the tenth embodiment is a Head-mounted display (HMD), the electronic device 30 includes an image capturing device 31, and the image capturing device 31 includes an optical image capturing system (not shown) and an electronic photosensitive element (not shown) according to the present invention, wherein the electronic photosensitive element is disposed on an image plane of the optical image capturing system.
< eleventh embodiment >
Fig. 20 is a schematic view illustrating an auxiliary device 40 for a vehicle according to an eleventh embodiment of the invention. The vehicular auxiliary device 40 of the eleventh embodiment is a driving recorder, the vehicular auxiliary device 40 includes an image capturing device 41, the image capturing device 41 includes an optical image capturing system (not shown) according to the present invention and an electronic photosensitive element (not shown), wherein the electronic photosensitive element is disposed on an image plane of the optical image capturing system.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (27)
1. An optical image capturing system, in order from an object side to an image side, comprises: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, wherein the first lens element has negative refractive power, the image-side surface of the first lens element is concave at a paraxial region thereof, the second lens element has positive refractive power, the image-side surface of the second lens element is convex at a paraxial region thereof, the sixth lens element includes at least one convex surface at an off-axis region thereof, the object-side surface and the image-side surface of the sixth lens element are aspheric, the image-side surface of the seventh lens element is concave at a paraxial region thereof and includes at least one convex surface at an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric;
wherein the total number of the lenses in the optical image capturing system is seven, the focal length of the optical image capturing system is f, the radius of curvature of the object-side surface of the first lens element is R1, the vertical distance between a critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, the aperture ratio of the optical image capturing system is Fno, the sum of the thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element on the optical axis is Σ CT, the distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element on the optical axis is Td, and the following conditions are satisfied:
|f/R1|<1.25；
0.1<Yc62/f<1.0；
fno < 2.0; and
0.55<ΣCT/Td<0.80。
2. the optical imaging system of claim 1, wherein a focal length of the optical imaging system is f, and a radius of curvature of the object-side surface of the first lens element is R1, which satisfies the following condition:
|f/R1|<1.0。
3. the optical imaging system of claim 1, wherein a focal length of the optical imaging system is f, and a radius of curvature of the image-side surface of the seventh lens element is R14, which satisfies the following condition:
1.5<f/R14。
4. the optical imaging system of claim 1, wherein a focal length of the optical imaging system is f, a focal length of the sixth lens element is f6, and a focal length of the seventh lens element is f7, which satisfies the following conditions:
|f/f6|+|f/f7|<0.75。
5. the optical imaging system as claimed in claim 1, wherein the image side surface of the fourth lens element is concave at the paraxial region.
6. The image capturing optical system of claim 1, wherein a maximum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses is sdma, a minimum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses is SDmin, which satisfies the following condition:
SDmax/SDmin<2.25。
7. the image capturing optical system as claimed in claim 1, wherein the second lens element is spaced apart from the third lens element by an optical distance T23, and the second lens element has an optical thickness CT2, which satisfies the following conditions:
T23/CT2<0.50。
8. an image capturing device, comprising:
the optical imaging system of claim 1; and
an electronic photosensitive element is arranged on an imaging surface of the optical image capturing system.
9. An optical image capturing system, in order from an object side to an image side, comprises: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, wherein the first lens element has negative refractive power, the image-side surface of the first lens element is concave at a paraxial region thereof, the sixth lens element includes at least one convex surface at an off-axis region thereof, the sixth lens element has an object-side surface and an image-side surface that are both aspheric, the image-side surface of the seventh lens element is concave at a paraxial region thereof and includes at least one convex surface at an off-axis region thereof, and the seventh lens element has an object-side surface and an image-side surface that are both aspheric;
wherein the total number of the lenses in the optical image capturing system is seven, the focal length of the optical image capturing system is f, the radius of curvature of the object-side surface of the first lens element is R1, the vertical distance between a critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, the aperture value of the optical image capturing system is Fno, the focal length of the sixth lens element is f6, and the focal length of the seventh lens element is f7, which satisfies the following conditions:
|f/R1|<1.25；
0.1<Yc62/f<1.0；
fno < 2.0; and
|f/f6|+|f/f7|<0.55。
10. the optical imaging system of claim 9, wherein the second lens element has positive refractive power.
11. The image capturing optical system of claim 9, wherein a focal length of the image capturing optical system is f, and a radius of curvature of the object-side surface of the first lens element is R1, which satisfies the following condition:
|f/R1|<1.0。
12. the optical imaging system of claim 9, wherein a focal length of the optical imaging system is f, and a radius of curvature of the image-side surface of the seventh lens element is R14, which satisfies the following condition:
1.5<f/R14。
13. the image capturing optical system of claim 9, wherein the seventh lens element has an object-side surface that is convex at a paraxial region and includes at least one concave surface at an off-axis region.
14. The image capturing optical system of claim 9, wherein the thickness of the sixth lens element along the optical axis is CT6, the thickness of the seventh lens element along the optical axis is CT7, and the distance between the sixth lens element and the seventh lens element along the optical axis is T67, which satisfies the following conditions:
1.75<(CT6+CT7)/T67。
15. the optical imaging system as claimed in claim 9, wherein the image side surface of the fourth lens element is concave at the near optical axis.
16. The image capturing optical system of claim 9, wherein a sum of thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element is Σ CT, an axial distance between an object-side surface of the first lens element and an image-side surface of the seventh lens element is Td, and the following conditions are satisfied:
0.55<ΣCT/Td<0.80。
17. the image capturing optical system of claim 9, wherein a maximum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses is sdma, a minimum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses is SDmin, which satisfies the following condition:
SDmax/SDmin<2.25。
18. an image capturing device, comprising:
the optical imaging system of claim 9; and
an electronic photosensitive element is arranged on an imaging surface of the optical image capturing system.
19. An optical image capturing system, in order from an object side to an image side, comprises: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, wherein the first lens element has negative refractive power, the image-side surface of the first lens element is concave at an off-axis location, the sixth lens element includes at least one convex surface at an off-axis location, the object-side surface and the image-side surface of the sixth lens element are aspheric, the seventh lens element has negative refractive power, the image-side surface of the seventh lens element is concave at a paraxial location and includes at least one convex surface at an off-axis location, and both the object-side surface and the image-side surface of the seventh lens element are aspheric;
wherein the total number of the lenses in the optical image capturing system is seven, the focal length of the optical image capturing system is f, the radius of curvature of the object-side surface of the first lens element is R1, the vertical distance between a critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, the aperture ratio of the optical image capturing system is Fno, the sum of the thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element on the optical axis is Σ CT, the distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element on the optical axis is Td, and the following conditions are satisfied:
|f/R1|<1.0；
0.1<Yc62/f<1.0；
fno < 2.0; and
0.55<ΣCT/Td<0.80。
20. the optical imaging system of claim 19, wherein the second lens element has positive refractive power.
21. The image capturing optical system of claim 19, wherein a focal length of the image capturing optical system is f, and a radius of curvature of the image-side surface of the seventh lens element is R14, which satisfies the following condition:
1.5<f/R14。
22. the image capturing optical system of claim 19, wherein the seventh lens element has an object-side surface that is convex at a paraxial region and includes at least one concave surface at an off-axis region.
23. The optical imaging system of claim 19, wherein a focal length of the optical imaging system is f, a focal length of the sixth lens element is f6, and a focal length of the seventh lens element is f7, which satisfies the following conditions:
|f/f6|+|f/f7|<0.75。
24. the optical imaging system as claimed in claim 19, wherein the fourth lens element has negative refractive power.
25. The image capturing optical system of claim 19, wherein a maximum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses is sdma, a minimum effective radius of the object-side and image-side surfaces of the first, second, third, fourth, fifth, sixth and seventh lenses is SDmin, which satisfies the following condition:
SDmax/SDmin<2.25。
26. the optical imaging system of claim 19, wherein an aperture value of the optical imaging system is Fno, which satisfies the following condition:
Fno≤1.90。
27. an image capturing device, comprising:
the optical imaging system of claim 19; and
an electronic photosensitive element is arranged on an imaging surface of the optical image capturing system.
Priority Applications (1)
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| CN201810970099.6A CN108957703B (en) | 2015-01-30 | 2015-01-30 | Optical image capturing system and image capturing device |
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| KR101859383B1 (en) * | 2015-10-19 | 2018-05-18 | 삼성전기주식회사 | Optical Imaging System |
| TWI614517B (en) * | 2017-01-04 | 2018-02-11 | 大立光電股份有限公司 | Image picking-up system, image capturing apparatus and electronic device |
| CN106597642B (en) * | 2017-01-22 | 2022-04-22 | 东莞市宇瞳光学科技股份有限公司 | Small-size super-high definition fixed focus lens |
| TWI622822B (en) * | 2017-09-13 | 2018-05-01 | 大立光電股份有限公司 | Image system lens assembly, image capturing unit and electronic device |
| WO2019085524A1 (en) | 2017-11-02 | 2019-05-09 | 浙江舜宇光学有限公司 | Optical imaging system |
| JP6684033B2 (en) * | 2017-12-12 | 2020-04-22 | カンタツ株式会社 | Imaging lens |
| JP7020938B2 (en) * | 2018-01-31 | 2022-02-16 | 株式会社タムロン | Imaging lens and imaging device |
| CN115437120A (en) | 2018-05-29 | 2022-12-06 | 三星电机株式会社 | Optical imaging system |
| CN108919459B (en) * | 2018-06-14 | 2019-09-10 | 江西联创电子有限公司 | Optical lens system |
| KR20200036395A (en) * | 2018-09-28 | 2020-04-07 | 삼성전기주식회사 | Image Capturing Lens System |
| CN109445067B (en) * | 2018-11-23 | 2020-05-29 | 江西联创电子有限公司 | Optical imaging lens and imaging apparatus |
| CN109613684A (en) * | 2019-02-18 | 2019-04-12 | 浙江舜宇光学有限公司 | Optical imaging lens |
| TW202229980A (en) * | 2020-11-18 | 2022-08-01 | 中強光電股份有限公司 | Imaging system and projection apparatus |
| CN117666095B (en) * | 2024-01-31 | 2024-04-12 | 深圳奇立电子科技有限公司 | Large-view-field short-focus ultra-short-distance ultra-high definition imaging system and lens |
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| CN103917908A (en) * | 2011-11-09 | 2014-07-09 | 富士胶片株式会社 | Imaging lens and imaging device |
| CN104238086A (en) * | 2013-06-17 | 2014-12-24 | 富士胶片株式会社 | Imaging lens and imaging apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105988193A (en) | 2016-10-05 |
| CN108957703A (en) | 2018-12-07 |
| CN105988193B (en) | 2018-10-19 |
| CN108873273A (en) | 2018-11-23 |
| CN108873273B (en) | 2021-08-20 |
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