CN107422457B - Optical lens group, optical module and electronic equipment - Google Patents
Optical lens group, optical module and electronic equipment Download PDFInfo
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- CN107422457B CN107422457B CN201710712704.5A CN201710712704A CN107422457B CN 107422457 B CN107422457 B CN 107422457B CN 201710712704 A CN201710712704 A CN 201710712704A CN 107422457 B CN107422457 B CN 107422457B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The present invention relates to the field of optical devices, and in particular, to an optical lens assembly, an optical module, and an electronic device. The optical lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side to an image side along the optical axis direction, and the optical lens group satisfies the following relation: f (f) 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；1.3<TTL/IH<1.5；1.09<f'/IH<1.29, therefore, the optical lens group can reduce the volume of the optical lens group under the condition of meeting the requirement of high imaging quality by adopting five lenses.
Description
Technical Field
The present invention relates to the field of optical devices, and in particular, to an optical lens assembly, an optical module, and an electronic device.
Background
With the popularity of consumer electronics, imaging devices including optical lens assemblies have been rapidly developed. The current consumer electronic products are increasingly thin and light, so that the miniaturization technology of the imaging equipment is increasingly required. Meanwhile, with the refinement of semiconductor process technology of a photosensitive coupling element (Charge CoupledDevice, CCD) or a complementary metal Oxide semiconductor element (Complementary Metal-Oxide SemiconductorSensor, CMOS Sensor), the pixel size of the photosensitive element is reduced, so that the volume of an optical lens group in the image device is reduced.
The conventional technology provides an optical lens group consisting of six lenses, which meets certain imaging requirements, but has larger volume and cannot meet the miniaturization requirement of the current optical lens group.
Disclosure of Invention
An object of the present invention is to provide an optical lens assembly, an optical module and an electronic device, which solve the technical problem of large size in the conventional technology.
In a first aspect, an embodiment of the present invention discloses an optical lens group including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially arranged from an object side to an image side along an optical axis direction, the optical lens group satisfying the following relation:
f 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；
1.3<TTL/IH<1.5；
1.09<f'/IH<1.29；
wherein f' is an effective focal length of the optical lens assembly, and focal lengths of the first lens and the fifth lens are respectively f 1 '、f 2 '、f 3 '、f 4 ' and f 5 And TTL is the distance between the object side surface of the first lens and the image side surface, and IH is the maximum image height of the optical lens group.
Optionally, the optical lens group further satisfies the following relation:
1<f'/f 1 '<1.5。
optionally, the optical lens group further satisfies the following relation:
-1<f'/f 345 '<-0.15，f 345 ' is the combined focal length of the third lens, the fourth lens and the fifth lens.
Optionally, the optical lens group further satisfies the following relation:
0.72<f 2 '/R L2R1 '<1.524，R L2R1 ' is the object-side radius of curvature of the second lens.
Optionally, the optical lens group further satisfies the following relation:
4.7<IH*R L5R2 '<10，R L5R2 ' is the image side of the fifth lensRadius of curvature of the face.
Optionally, the optical lens group further satisfies the following relation:
CT/AC >1.6, CT is the sum of thicknesses of the first lens to the fifth lens on the optical axis, and AC is the sum of thicknesses of air gaps of the first lens to the fifth lens on the optical axis.
Optionally, the optical lens group further satisfies the following relation:
CT1/CT <0.3, wherein CT1 is the center thickness of the first lens on the optical axis, and CT is the sum of the thicknesses of the first lens to the fifth lens on the optical axis.
Optionally, the optical lens group further satisfies the following relation:
(CT 2+ CT 3)/CT >0.252, CT2 being the center thickness of the second lens on the optical axis, CT3 being the center thickness of the third lens on the optical axis, CT being the sum of the thicknesses of the first lens to the fifth lens on the optical axis.
Optionally, the optical lens group further satisfies the following relation:
0.82< ct2/CT3<1, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis.
Optionally, the optical lens group further satisfies the following relation:
AC 23 /AC>0.27, AC is the sum of the thicknesses of the air gaps of the first lens to the fifth lens on the optical axis, AC 23 Is an air gap thickness on the optical axis between the second lens and the third lens.
In a second aspect, an embodiment of the present invention provides an optical module, where the optical module includes any one of the optical lens groups, and further includes a lens barrel, a base assembly, an image sensing element, and a substrate, where the optical lens group is accommodated in the lens barrel, the base assembly abuts against an outer side of the lens barrel, and the image sensing element is disposed on the substrate.
Optionally, the base assembly includes a base and an image rear seat, the inner side of the base supports the outer side of the lens barrel, one side of the image rear seat supports the base, and the other side supports the substrate.
Optionally, the pedestal includes first pedestal unit, second pedestal unit, third pedestal unit, coil and magnetic assembly, the inboard of first pedestal unit with the outside of lens cone supports and holds, the coil set up in between the outside of first pedestal unit and the inboard of second pedestal unit, magnetic assembly set up in between the coil with the inboard of second pedestal, the third pedestal unit supports and holds the outside of second pedestal unit.
Optionally, the optical module further includes an optical filter, and the optical filter is disposed behind the fifth lens along the optical axis direction.
Optionally, a spacer is disposed between the same ends of every two adjacent lenses in the optical lens group.
In a third aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes any one of the optical modules, and further includes a housing, and the optical module is accommodated in the housing.
In various embodiments of the present invention, an optical lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially arranged from an object side to an image side and along an optical axis direction, wherein the optical lens group satisfies the following relationship: f (f) 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；1.3<TTL/IH<1.5；1.09<f'/IH<1.29, therefore, the optical lens group can reduce the volume of the optical lens group under the condition of meeting the requirement of high imaging quality by adopting five lenses.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
FIG. 1 is a cross-sectional view of a lens provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an optical lens assembly according to an embodiment of the present invention;
FIG. 2a is a schematic diagram of an embodiment of the present invention for providing optical data of each lens in an optical lens assembly;
FIG. 2b is a schematic diagram of an aspheric parameter of an optical lens assembly according to an embodiment of the present invention;
FIG. 2c is a schematic diagram of field curvature and distortion of an optical lens assembly according to an embodiment of the present invention;
FIG. 2d is a schematic view illustrating a longitudinal aberration of an optical lens assembly according to an embodiment of the invention;
FIG. 3 is a cross-sectional view of an optical lens assembly according to a second embodiment of the present invention;
fig. 3a is a schematic diagram of optical data of each lens in an optical lens assembly according to a second embodiment of the present invention;
FIG. 3b is a schematic diagram of aspheric parameters of an optical lens assembly according to a second embodiment of the present invention;
FIG. 3c is a schematic diagram of curvature of field and distortion of an optical lens assembly according to a second embodiment of the present invention;
fig. 3d is a schematic view illustrating a longitudinal aberration of an optical lens assembly according to a second embodiment of the present invention;
fig. 4 is a cross-sectional view of an optical lens assembly according to a third embodiment of the present invention;
FIG. 4a is a schematic diagram of an optical data of each lens in an optical lens assembly according to a third embodiment of the present invention;
FIG. 4b is a schematic diagram of an aspheric parameter of an optical lens assembly according to a third embodiment of the present invention;
FIG. 4c is a schematic diagram of curvature of field and distortion of an optical lens assembly according to a third embodiment of the present invention;
fig. 4d is a schematic view illustrating a longitudinal aberration of an optical lens assembly according to a third embodiment of the present invention;
fig. 5 is a cross-sectional view of an optical lens assembly according to a fourth embodiment of the present invention;
FIG. 5a is a schematic diagram of an optical data of each lens in an optical lens assembly according to a fourth embodiment of the present invention;
FIG. 5b is a schematic diagram of an aspheric parameter of an optical lens assembly according to a fourth embodiment of the present invention;
FIG. 5c is a schematic diagram of curvature of field and distortion of an optical lens assembly according to a fourth embodiment of the present invention;
FIG. 5d is a schematic view illustrating a longitudinal aberration of an optical lens assembly according to a fourth embodiment of the present invention;
FIG. 6 is a schematic diagram showing specific numerical and proportional relationships of focal lengths, combined focal lengths, etc. of the lenses in the first to fourth embodiments according to the fifth embodiment of the present invention;
FIG. 7 is a schematic diagram of an optical module according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The lens provided by the embodiment of the invention comprises an object side surface and an image side surface, wherein the object side surface or the image side surface can be a concave surface or a convex surface, the concave surface refers to a direction parallel to an optical axis as a reference object, the concave surface is concave inwards relative to an adjacent outer side area, and the convex surface is convex inwards relative to the adjacent outer side area.
As shown in fig. 1, the imaging light includes a central chief ray L cc Central marginal ray L cm Principal ray of circumference L c Edge ray L m The lens 100 has a central optical axis L cc Symmetry is performed with respect to the symmetry axis, wherein the optical axis region 11 is an optical axis region, and the circumferential region 12 is a non-optical axis region. The object side of the optical axis region of the lens 100 is concave and the object side of the circumferential region 12 is convex. The optical axis area of the lens 100The image side is concave and the image side of the circumferential region 12 is convex.
By configuring different lens numbers and lens parameters, the optical lens group composed of a plurality of lenses can be suitable for electronic equipment with different resolutions. The high resolution may be specifically 2100 ten thousand pixels or more.
Example 1
As shown in fig. 2, the optical lens assembly 200 includes a first lens L11, a second lens L12, a third lens L13, a fourth lens L14 and a fifth lens L15, which are sequentially arranged from an object side OBJ to an image side IMA along an optical axis direction. The operating wavelength of the optical lens assembly 200 may be 656 nm or 587 nm or 486 nm.
The first lens element L11 includes an object-side surface L111 and an image-side surface L112. The object side face L111 of the optical axis area of the first lens L11 is a convex surface, and the image side face L112 of the optical axis area is a concave surface. The first lens element L11 is made of plastic, and the object-side surface L111 and the image-side surface L112 are aspheric. The first lens L11 facilitates condensing light by the optical lens assembly 200, and shortens the overall length of the optical lens assembly 200.
The second lens element L12 includes an object-side surface L121 and an image-side surface L122. The object side face L121 of the optical axis area of the second lens L12 is a convex surface, and the image side face L122 of the optical axis area is a concave surface. The second lens element L12 is made of plastic, and the object-side surface L121 and the image-side surface L122 are aspheric. The second lens L12 corrects aberration of the optical lens assembly 200.
The third lens element L13 includes an object-side surface L131 and an image-side surface L132. The object side face L131 of the optical axis area of the third lens L13 is concave, and the image side face L132 of the optical axis area is convex. The third lens element L13 is made of plastic, and the object-side surface L131 and the image-side surface L132 are aspheric. The third lens L13 corrects aberration of the optical lens assembly 200.
The fourth lens element L14 comprises an object-side surface L141 and an image-side surface L142. The object side face L141 of the optical axis region of the fourth lens element L14 is concave, and the image side face L142 of the optical axis region is convex. The fourth lens element L14 is made of plastic, and the object-side surface L141 and the image-side surface L142 thereof are aspheric. The fourth lens L14 corrects aberration of the optical lens assembly 200.
The fifth lens element L15 comprises an object-side surface L151 and an image-side surface L152. The object side surface L151 of the optical axis area of the fifth lens element L15 is a concave surface, the image side surface L152 of the optical axis area is a concave surface, the fifth lens element L15 has at least one inflection point 25a, and the inflection point 25a is an inflection point of the concave-convex surface of the fifth lens element L15, which can suppress the incident angle of light rays from the off-axis field of view and correct aberrations. The fifth lens element L15 is made of plastic, and the object-side surface L151 and the image-side surface L152 are aspheric. The fifth lens element L15 is beneficial to correcting curvature of field, higher-order phase difference and depressing the angle of the principal ray, thereby improving the image capturing sensitivity of the optical lens assembly 200.
Referring to fig. 2, the optical lens assembly 200 further includes an optical filter 21 and an image sensor 22. The optical filter 21 is disposed behind the fifth lens element L15 along the optical axis, wherein the optical filter 21 includes an optical filter object side surface 211 and an optical filter image side surface 212, and the image sensor 22 is disposed on the imaging surface.
In this embodiment, an air gap exists among each lens, the filter 21 and the image sensor 22. For example, an air gap D exists between the first lens L11 and the second lens L12 in the optical axis direction 12 An air gap D exists between the second lens L12 and the third lens L13 in the optical axis direction 23 An air gap D exists between the third lens L13 and the fourth lens L14 in the optical axis direction 34 An air gap D exists between the fourth lens L14 and the fifth lens L15 in the optical axis direction 45 . In some embodiments, in order to achieve miniaturization of the optical lens assembly, the lenses may be attached to each other by a process to eliminate an air gap between the lenses. In design, the sum agg=d of the air gaps of the five lenses 12 +D 23 +D 34 +D 45 。
In the present embodiment, an optical lens group excellent in optical performance and miniaturized can be realized by configuring control parameters for respective lenses.
For example: when the optical lens group satisfies the following relation:
f 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；
1.3<TTL/IH<1.5；
1.09<f'/IH<1.29；
the optical lens group can reduce the volume of the optical lens group under the requirement of providing high imaging quality.
Wherein f' is the effective focal length of the optical lens assembly 200, and the focal lengths of the first lens element L11 to the fifth lens element L15 are f 1 '、f 2 '、f 3 '、f 4 ' and f 5 ' TTL is the distance between the object side surface of the first lens element L11 and the image plane of the image side, and IH is the maximum image height of the optical lens assembly 200.
Based on the teachings of the above embodiments, to further correct aberrations and other improvements, in some embodiments, the optical lens set 200 also satisfies the following relationship:
1<f'/f 1 '<1.5。
or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
-1<f'/f 345 '<-0.15，f 345 ' is the combined focal length of the third lens L13, the fourth lens L14 and the fifth lens L15.
Or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
0.72<f 2 '/R L2R1 '<1.524，R L2R1 ' is the object-side radius of curvature of the second lens L12.
Or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
4.7<IH*R L5R2 '<10，R L5R2 ' is the image-side radius of curvature of the fifth lens L15.
Or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
CT/AC >1.6, CT is the sum of thicknesses of the first lens L11 to the fifth lens L15 on the optical axis, and AC is the sum of thicknesses of air gaps of the first lens L11 to the fifth lens L15 on the optical axis.
Or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
CT1/CT <0.3, CT1 is the center thickness of the first lens L11 on the optical axis, and CT is the sum of the thicknesses of the first lens L11 to the fifth lens L15 on the optical axis.
Or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
(CT2+CT3)/CT >0.252, CT2 is the center thickness of the second lens L12 on the optical axis, CT3 is the center thickness of the third lens L13 on the optical axis, and CT is the sum of the thicknesses of the first lens L11 to the fifth lens L15 on the optical axis.
Or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
0.82<CT2/CT3<1。
or,
in some embodiments, the optical lens assembly 200 further satisfies the following relationship:
AC 23 /AC>0.27，AC 23 is the thickness of the air gap between the second lens L12 and the third lens L13 on the optical axis.
The relationships between the lenses defined in the above embodiments may be arbitrarily combined to adjust the physical-optical properties of the lenses.
Referring to fig. 2a, fig. 2a is a schematic diagram of an optical data of each lens in an optical lens assembly according to an embodiment of the invention. As shown in fig. 2a, the focal length f' of the optical lens assembly of the present embodiment is 3.61mm (millimeters), the field angle FOV is 74.4deg, the total system length TTL is 4.2mm, the aperture value Fno is 2.357, and the control parameters of each lens are shown in fig. 2a, which is not repeated here. As can be seen from fig. 2a, the optical lens assembly 200 according to the present embodiment provides pixel resolution and greatly reduces the size.
As mentioned above, the object-side surfaces and the image-side surfaces of the five lenses are aspheric, wherein the object-side surfaces and the image-side surfaces are defined according to the following aspheric curve formula:
wherein z represents the distance along the optical axis from any point of the aspherical surface to the vertex of the aspherical surface;
c represents the curvature at the apex of the aspherical surface;
r represents the distance from any point of the aspheric surface to the optical axis;
k represents an aspherical quadric surface coefficient;
α 2n coefficients of the n-th order polynomial representing the aspherical surface r.
Referring to fig. 2b, fig. 2b is a schematic diagram of an aspheric parameter of an optical lens assembly according to an embodiment of the present invention. As shown in fig. 2b, the object side surface and the image side surface of each lens correspond to aspheric parameters.
Referring to fig. 2c and fig. 2d together, fig. 2c is a schematic diagram of curvature of field and distortion of an optical lens assembly according to an embodiment of the invention, and fig. 2d is a schematic diagram of longitudinal aberration of an optical lens assembly according to an embodiment of the invention.
As shown in fig. 2c, the optical lens assembly shows good optical performance, and the focal lengths of different wavelengths in the field of view are all within ±0.05mm, so that the optical lens assembly can effectively eliminate aberration, and the phenomenon of chromatic dispersion is also significantly improved. Further, the distortion of the optical lens group is limited to be within a range of +/-2%, so that the distortion of the optical lens group meets the imaging quality standard in the industry. As shown in fig. 2d, the deviation of the imaging point of the off-axis light rays with different heights is controlled within ±0.02mm according to the deviation amplitude of each curve, so that the optical lens group improves the spherical aberration of different wavelengths.
In summary, when the optical lens group at least satisfies the relationship: f (f) 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；1.3<TTL/IH<1.5；1.09<f'/IH<1.29, the optical lens group adopts five lenses, so that the volume of the optical lens group can be reduced under the condition of meeting the requirement of high imaging quality.
Example two
As shown in fig. 3, the optical lens assembly 300 according to the second embodiment of the present invention includes a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, a fifth lens L25, a filter 31, and an image sensor 32, which are sequentially arranged from an object side OBJ to an image side IMA along an optical axis direction. Further, the optical filter 31 is disposed behind the fifth lens element L25 along the optical axis, wherein the optical filter 31 includes an object-filtering side surface 311 and an image-filtering side surface 312, and the image sensor 32 is disposed on the image plane. The working wavelength of the optical lens assembly 300 may be 656 nm, 587 nm, 486 nm, or both.
The concave-convex surfaces of the first lens element L21-fifth lens element L25 and the object-side surface L211-212, the image-side surface L251-image-side surface L252, and the refractive power of each lens element are identical to those of the embodiment illustrated in fig. 2, and are not described herein.
The difference from the above embodiments is that the optical data and the aspheric parameters of each lens in the optical lens assembly provided in the present embodiment are shown in fig. 3a and 3b, which are not repeated here. As is apparent from fig. 3a and 3b, the optical lens assembly provides pixel resolution and also greatly reduces the size.
Further, the difference from the above embodiment is that the curvature of field, distortion and longitudinal aberration of the optical lens assembly provided in this embodiment are shown in fig. 3c and 3d, which are not repeated here. As shown in fig. 3c and 3d, the optical lens assembly reduces the volume of the optical lens assembly while satisfying the requirement of high imaging quality.
Example III
As shown in fig. 4, the third embodiment of the present invention provides an optical lens assembly 400 including a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, a fifth lens L35, a filter 41, and an image sensor 42 sequentially arranged from an object side OBJ to an image side IMA along an optical axis direction. Further, the optical filter 41 is disposed behind the fifth lens element L35 along the optical axis, wherein the optical filter 41 includes an object-side surface 411 and an image-side surface 412, and the image sensor 42 is disposed on the image plane. The working wavelength of the optical lens assembly 400 may be 656 nm, 587 nm, 486 nm, or both.
The concave-convex surfaces of the first lens element L31 to the object-side surface L311, the image-side surface L351 to the image-side surface L352 and the refractive power of each lens element are identical to those of the embodiment illustrated in fig. 2, and are not described herein.
The difference from the above embodiment is that the optical data and the aspheric parameters of each lens in the optical lens assembly provided in the present embodiment are shown in fig. 4a and fig. 4b, which are not repeated here. As is apparent from fig. 4a and 4b, the optical lens assembly can be greatly reduced in size while satisfying the high pixel resolution.
Further, the difference from the above embodiment is that the curvature of field, distortion and longitudinal aberration of the optical lens assembly provided in this embodiment are shown in fig. 4c and 4d, which are not repeated here. As shown in fig. 4c and 4d, the optical lens assembly reduces the volume of the optical lens assembly while satisfying the requirement of high imaging quality.
Example IV
As shown in fig. 5, a fourth embodiment of the present invention provides an optical lens assembly 500 including a first lens L41, a second lens L42, a third lens L43, a fourth lens L44, a fifth lens L45, a filter 51, and an image sensor 52 sequentially arranged from an object side OBJ to an image side IMA along an optical axis direction. Further, the optical filter 51 is disposed behind the fifth lens element L45 along the optical axis, wherein the optical filter 51 includes an optical filter object side surface 511 and an optical filter image side surface 512, and the image sensor 52 is disposed on the imaging surface. The working wavelength of the optical lens assembly 500 may be 656 nm, 587 nm, 486 nm, or both.
The concave-convex surfaces of the first lens element L41 to the fifth lens element L45 and the object-side surface L411 to the object-side surface L412, the image-side surface L451 to the image-side surface L452 respectively correspond to each other, and their refractive powers are the same as those of the embodiment shown in fig. 2, and are not repeated herein.
The difference from the above embodiments is that the optical data and the aspheric parameters of each lens in the optical lens assembly provided in the present embodiment are shown in fig. 5a and 5b, which are not repeated here. As is apparent from fig. 5a and 5b, the optical lens assembly provides high pixel resolution while also greatly reducing the size.
Further, the difference from the above embodiment is that the curvature of field, distortion and longitudinal aberration of the optical lens assembly provided in this embodiment are shown in fig. 5c and 5d, and are not described herein. As shown in fig. 5c and 5d, the optical lens assembly reduces the volume of the optical lens assembly while satisfying the requirement of high imaging quality.
Example five
In the present embodiment, as shown in fig. 6, specific numerical and proportional relationships of focal lengths, combined focal lengths, and the like of the respective lenses in the above-described first to fourth embodiments are provided. Obviously, the optical lens group can reduce the volume of the optical lens group under the condition of meeting the requirement of high-quality imaging quality.
As another aspect of the present embodiment, as shown in fig. 7, the optical module 700 includes five lenses 711 to 715 in the optical lens group 71, and further includes a lens barrel 72, a housing assembly 73, an image sensing element 74, a substrate 75, and an optical filter 76, where the optical lens group 71 may be the optical lens group described in the above embodiments.
In the present embodiment, the optical lens assembly 71 is accommodated in the lens barrel 72, the housing assembly 73 abuts against the outer side of the lens barrel 72, and the image sensor 74 is disposed on the imaging surface of the optical lens assembly 71. The image sensor 74 is carried on the substrate 75, and the filter 76 is disposed behind the fifth lens 716 along the optical axis direction.
Referring to fig. 7 again, the housing module 73 includes a housing 731 and an image rear seat 732, wherein the inner side of the housing 731 abuts against the outer side of the lens barrel 72, and one side of the image rear seat 732 abuts against the housing 731 and the other side abuts against the substrate 75.
The housing 731 includes a first housing unit 7311, a second housing unit 7312, a third housing unit 7313, a coil 7314, and a magnetic component (not shown), wherein the inner side of the first housing unit 7311 is abutted against the outer side of the lens barrel 72, the coil 7313 is disposed between the outer side of the first housing unit 7311 and the inner side of the second housing unit 7312, the magnetic component is disposed between the coil 7314 and the inner side of the second housing unit 7312, and the third housing unit 7312 is abutted against the outer side of the second housing unit 7312.
In some embodiments, as shown in fig. 7, a spacer 716 is provided between the same end of each adjacent two lenses in the optical lens group 71.
When the optical lens group at least satisfies the relation: f (f) 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；1.3<TTL/IH<1.5；1.09<f'/IH<1.29, the optical module adopts five lenses, so that the volume of the optical lens group can be reduced under the condition of meeting the requirement of high imaging quality.
As another aspect of the embodiment of the present invention, as shown in fig. 8, an electronic device 800 includes an optical module 801, and a housing 802, where the optical module 801 is accommodated in the housing 802. The optical module 801 may be an optical module as described in the above embodiments.
The electronic device may be a large video playback device, a gaming machine, a desktop computer, a smart phone, a tablet computer, a laptop portable computer, an electronic book reader, and other display terminals.
When the optical lens group at least satisfies the relation: f (f) 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；1.3<TTL/IH<1.5；1.09<f'/IH<1.29, the optical lens group adopts five lenses, so that the volume of the optical lens group can be reduced under the condition of meeting the requirement of high imaging quality.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (16)
1. An optical lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side to an image side along an optical axis direction,
the optical lens group satisfies the following relation:
f 1 '>0，f 2 '<0，f 3 '<0，f 4 '>0，f 5 '<0；
1.3<TTL/IH<1.5；
1.09<f'/IH<1.29；
wherein f' is an effective focal length of the optical lens assembly, and focal lengths of the first lens and the fifth lens are respectively f 1 '、f 2 '、f 3 '、f 4 ' and f 5 And TTL is the distance between the object side surface of the first lens and the image side surface of the image side, IH is the maximum image height of the optical lens group, and the object side surfaces and the image side surfaces of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are aspheric.
2. The optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
1<f'/f 1 '<1.5。
3. the optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
-1<f'/f 345 '<-0.15，f 345 ' is the combined focal length of the third lens, the fourth lens and the fifth lens.
4. The optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
0.72<f 2 '/R L2R1 '<1.524，R L2R1 ' is the object-side radius of curvature of the second lens.
5. The optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
4.7<IH*R L5R2 '<10，R L5R2 ' is the image side radius of curvature of the fifth lens.
6. The optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
CT/AC >1.6, CT is the sum of thicknesses of the first lens to the fifth lens on the optical axis, and AC is the sum of thicknesses of air gaps of the first lens to the fifth lens on the optical axis.
7. The optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
CT1/CT <0.3, wherein CT1 is the center thickness of the first lens on the optical axis, and CT is the sum of the thicknesses of the first lens to the fifth lens on the optical axis.
8. The optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
(CT 2+ CT 3)/CT >0.252, CT2 being the center thickness of the second lens on the optical axis, CT3 being the center thickness of the third lens on the optical axis, CT being the sum of the thicknesses of the first lens to the fifth lens on the optical axis.
9. The optical lens group of claim 1, wherein the optical lens group further satisfies the following relationship:
0.82< ct2/CT3<1, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis.
10. The optical lens group according to any one of claims 1 to 9, wherein the optical lens group further satisfies the following relation:
AC 23 /AC>0.27, AC is the sum of the thicknesses of the air gaps of the first lens to the fifth lens on the optical axis, AC 23 Is an air gap thickness on the optical axis between the second lens and the third lens.
11. An optical module set according to any one of claims 1 to 10, further comprising a lens barrel, a base assembly, an image sensor and a substrate, wherein the optical lens set is accommodated in the lens barrel, the base assembly abuts against the outer side of the lens barrel, and the image sensor is disposed on the substrate.
12. The optical module of claim 11, wherein the housing assembly comprises a housing and an image rear housing, the inner side of the housing abuts the outer side of the barrel, one side of the image rear housing abuts the housing, and the other side abuts the substrate.
13. The optical module of claim 12, wherein the housing comprises a first housing unit, a second housing unit, a third housing unit, a coil, and a magnetic assembly, the inner side of the first housing unit is abutted against the outer side of the lens barrel, the coil is disposed between the outer side of the first housing unit and the inner side of the second housing unit, the magnetic assembly is disposed between the coil and the inner side of the second housing unit, and the third housing unit is abutted against the outer side of the second housing unit.
14. The optical module according to any one of claims 11 to 13, further comprising a filter disposed rearward of the fifth lens in an optical axis direction.
15. The optical module of claim 14, wherein a spacer is disposed between the same ends of each adjacent two lenses in the optical lens group.
16. An electronic device comprising the optical module of any one of claims 11 to 15, and further comprising a housing in which the optical module is housed.
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| CN201710712704.5A CN107422457B (en) | 2017-08-18 | 2017-08-18 | Optical lens group, optical module and electronic equipment |
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Effective date of registration: 20190203 Address after: 518107 Phoenix Community Gateway 269, Phoenix Street, Guangming New District, Shenzhen City, Guangdong Province, Building B 402, Delun Electronic Industrial Park Applicant after: Shenzhen Jingti Optics Co.,Ltd. Address before: 518107 Delun Electronic Industrial Park, No. 9, 33rd Road, Guangming Street, Guangming New District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN DEREN ELECTRONIC Co.,Ltd. |
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