CN103984083A - Optical lens assembly - Google Patents
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- CN103984083A CN103984083A CN201410062135.0A CN201410062135A CN103984083A CN 103984083 A CN103984083 A CN 103984083A CN 201410062135 A CN201410062135 A CN 201410062135A CN 103984083 A CN103984083 A CN 103984083A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 37
- 239000011521 glass Substances 0.000 claims abstract description 19
- 238000003384 imaging method Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 21
- 239000005304 optical glass Substances 0.000 claims description 21
- 241000511976 Hoya Species 0.000 claims description 18
- 101000596093 Homo sapiens Transcription initiation factor TFIID subunit 1 Proteins 0.000 claims description 3
- 102100035222 Transcription initiation factor TFIID subunit 1 Human genes 0.000 claims description 3
- 230000000747 cardiac effect Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 210000000695 crystalline len Anatomy 0.000 description 139
- 241000219739 Lens Species 0.000 description 138
- 238000012544 monitoring process Methods 0.000 description 8
- 230000004075 alteration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 241000700608 Sagitta Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention relates to an optical lens assembly applied to a high-definition 1/2.5-inch specification 5 million pixel camera group in the field of an electronic product of an automobile visual system. The optical lens assembly comprises a fixed diaphragm, a group of lenses and a glass optical filter. The group of lenses comprise a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are successively arranged from an object side to an image side on the same optical axis. The match of each eyeglass can effectively shorten the length of a lens, and at the same time, light is reflected through a high-order curved surface by use of an aspheric eyeglass so as to ensure that the light can be accurately focused at one point, effectively eliminate various astigmations of the light and ensure the imaging high quality of the lens; through the match of each eyeglass of the optical lens, the height of the lens can be effectively shortened to smaller than 24 mm, the angle of visual field of 150 degrees, and the stop number F/NO is controlled to be 2.2; and through arranging the diaphragm in the middle, the generation of various astigmations in a lens system can be reduced, the lens quality is ensured, and the manufacturing cost is decreased.
Description
Technical field
The present invention relates to optical device field, espespecially a kind of optical lens assembly of 1/2.5 inch of specification of electronic product field high definition, the 5000000 pixel camera head groups for automotive visual system.
Background technology
Economic fast development improves people's living standard thereupon, and automobile is more and more, has caused very large pressure like this to road management.Public transport is the indispensable vehicles in city, so government all advocates public traffic in priority all the time, also become a pith in the intelligent transportation rule in each city simultaneously, so can alleviate urban traffic pressure, avoid more accident to occur, strengthen public traffic management, people are gone on a journey safer.Certainly traffic administration also will be carried out omnibearing upgrading, specially for the more advanced supervisory system " vehicle-mounted monitoring " of vehicle development is comprehensively monitored, make the situation outside can be the more in time more clear understanding Che Neiche of managerial personnel, and can guide road, make each city can step into one smoothly in the middle of current environment.
Vehicle-mounted monitoring is introduced urban transportation, must welcome more car owners' welcome, and one can make path link suitable, alleviates congestion in road, makes to pass through and do not cause delay smoothly.Two come also can be for car owner provides road information, and which road front blocks up a bit enables to turn in time other roads current smoothly.The most important is exactly better guarantee driving safety.Vehicle-mounted monitoring apply very extensively, application at home reaches a climax, and is mainly used in public transport field and transport field.In this process, vehicle-mounted monitoring has obtained upgrading, monitor from the single vehicle-mounted 3G that upgrades to before, can realize remote monitoring, that single vehicle-mounted monitoring institute is irrealizable, can carry out omnibearing understanding Information at any time to driving situation, traffic safety can be monitored in real time in shorter time simultaneously.High definition at present, the monitoring product of high pixel has become the main flow in monitoring market.But the lens assembly in the camera module in the existing electronic product field that is applied to automotive visual system as China Patent No. be that 201110307278.X and China Patent No. are 201310010341, China Patent No. is 201210180293 but to exist imaging pixel low, field angle is little, the defect that optics is always grown up.For adapting to domestic market demand, needing the high pixel of development and Design is object with reducing its production cost, and solve current technology as China Patent No. be that 201110307278.X and China Patent No. are 201310010341, China Patent No. is that the new camera lens of these defects of 201210180293 existence is seized market.
Summary of the invention
The present invention be intended to for solve current technology as China Patent No. be that 201110307278.X and China Patent No. are 201310010341, China Patent No. is 201210180293 to exist imaging effect poor, field angle is little, the various defects that optics is always grown up, provide a kind of imaging effect good, large aperture, the optics 5,000,000 pixel lens assemblies of high brightness.For achieving the above object, the technical solution used in the present invention is: a kind of optical lens assembly, comprises fixed aperture, one group of lens, a glass filter, these group lens comprise the first lens being arranged in order to image space from object space on the axle of sharing the same light, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens the 4th lens surface is aspheric surface, and its aspheric surface formula is:
Wherein, Z represents the Z coordinate figure of lens surface each point, Y represents the Y-axis coordinate figure of each point on lens surface, CURV is the inverse of the radius-of-curvature of lens surface, K is circular cone coefficient, and A, B, C, D, E, F, G, H are high-order asphericity coefficient, and the face shape parameter on the forward and backward surface of the 4th lens is respectively as table 1, table 2, shown in:
This fixed aperture is arranged between the 3rd lens and the 4th lens, after this glass filter is positioned at the 6th eyeglass, before the imaging surface of this optical lens assembly, wherein the center thickness of first lens is 0.79～0.82mm, the center thickness of the second lens is 1.52～1.54mm, the center thickness of the 3rd lens is 4.14～4.16mm, the center thickness of the 4th lens is 3.85～3.87mm, the center thickness of the 5th lens is 3.12～3.15mm, and the center thickness of the 6th lens is 0.72～0.76mm.
Wherein, the material of described first lens is optical glass HOYA BACED5, the material of these the second lens is optical glass HOYA FD15, the material of the 3rd lens is optical glass HOYA FD110, the material of the 4th lens is optical glass HOYA TAFD45, the material of the 5th lens is optical glass HOYA TAF1, and the material of the 6th lens is optical glass HOYA S-NPH2, and the material of this glass filter is optical glass Xiao Te D263T.
Wherein, described first lens refractive index is 1.658435, and abbe number is 50.854579; Second index of refraction in lens is 1.698945, and abbe number is 30.050548; The 3rd index of refraction in lens is 1.784719, and abbe number is 25.720798; The 4th index of refraction in lens is 1.953747, and abbe number is that 32.318760, the five index of refraction in lens are 1.772500, and abbe number is that 49.624286, the six index of refraction in lens are 1.922860, and abbe number is 18.896912.
Wherein, described first lens front surface convex surface and protruding in object space, and protruding spherical radius is 16～17mm; Rear surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.7～3.9mm; The second lens front surface upper and lower side is that planar central portion is convex surface and protruding in object space, and protruding spherical radius is 7.5～7.7mm; Rear surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.6～3.8mm; The 3rd lens front surface is convex surface and protruding in object space, and protruding spherical radius is 16.5～16.7mm; Rear surface is plane; The 4th lens front surface upper and lower side be planar central portion be concave surface and central fovea to object space, rear surface is convex surface and protruding in image space; The 5th lens front surface be convex surface and middle cardiac prominence to object space, and protruding spherical radius is 41.3～41.5mm; Rear surface is convex surface and protruding in image space, and protruding spherical radius is 3.4～3.6mm; The 6th lens front surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.4～3.6mm; Rear surface is convex surface and protruding in image space, and protruding spherical radius is 12.4～12.6mm.
Wherein, the 4th described lens are aspheric surface glass lens, and the 5th lens and the 6th lens are glass cement zoarium.
Wherein, described optical lens assembly optics overall length is less than 24mm, and field angle is 150 degree, and f-number F/NO is controlled at 2.2, ensures high brightness.
Adopt the beneficial effect after technique scheme to be embodied in: lens combination of the present invention adopts a glass aspheric lenses and five glass spherical lens mix and match, the optical lens of other lenses group has the high advantage of brightness relatively, simultaneously by adopting aspherical lens to make the refraction of light through high-order curved surface, can guarantee that light accurately focuses on a bit, effectively eliminate the various aberrations of light, guarantee the high-quality of imaging.The height that camera lens can be effectively shortened in the collocation of each eyeglass by optical lens is less than 24mm, and field angle is 150 degree, and f-number F/NO is controlled at 2.2, ensures high brightness; Mid-by diaphragm, can reduce the generation of various aberrations in lens system, ensure lens imaging quality, enhance productivity.
By following description also by reference to the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used for explaining embodiments of the invention.
Brief description of the drawings
The structural representation of Fig. 1 optical lens group of the present invention;
MTF (modulated optical transport function) schematic diagram of Fig. 2 optical lens assembly of the present invention
The curvature of field schematic diagram of Fig. 3 optical lens assembly of the present invention
The distortion schematic diagram of Fig. 4 optical lens assembly of the present invention
The relative exposure schematic diagram of Fig. 5 optical lens assembly of the present invention
Accompanying drawing mark explanation: 1-first lens; 2-the second lens; 3-the 3rd lens; 4-fixed aperture; 5-the 4th lens; 6-the 5th lens; 7-the 6th lens; 8-optical filter; 9-image space.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing: as shown in Figure 1, a kind of optical lens assembly, comprise fixed aperture (4), one group of lens, a glass filter (8), these group lens comprise the first lens (1) being arranged in order to image space (9) from object space on the axle of sharing the same light, the second lens (2), the 3rd lens (3), the 4th lens (5), the 5th lens (6), the 6th lens (7), the 4th lens (5) surface is non-ball ball, and its aspheric surface formula is:
Wherein, Z represents the Z coordinate figure of lens surface each point, Y represents the Y-axis coordinate figure of each point on lens surface, CURV is the inverse of the radius-of-curvature of lens surface, K is circular cone coefficient, A, B, C, D, E, F, G, H are high-order asphericity coefficient, and the face shape parameter on the forward and backward surface of the 4th lens (5) is respectively as table 1, shown in table 2:
This fixed aperture (4) is arranged between the 3rd lens (3) and the 4th lens (5), this glass filter (8) is positioned at the 6th eyeglass (7) afterwards, the imaging surface of this optical lens assembly (9) before, wherein the center thickness of first lens (1) is 0.79～0.82mm, preferably 0.81mm; The center thickness of the second lens (2) is 1.52～1.54mm, preferably 1.53mm; The center thickness of the 3rd lens (3) is 4.14～4.16mm, preferably 4.155mm; The center thickness of the 4th lens (5) is 3.85～3.87mm, preferably 3.86mm; The center thickness of the 5th lens (6) is 3.12～3.15mm, preferably 3.13mm; The center thickness of the 6th lens (7) is 0.72～0.76mm, preferably 0.73mm.
The material of described first lens (1) is optical glass HOYA BACED5, the material of these the second lens (2) is optical glass HOYA FD15, the material of the 3rd lens (3) is optical glass HOYA FD110, the material of the 4th lens (5) is optical glass HOYA TAFD45, the material of the 5th lens (6) is optical glass HOYA TAF1, the material of the 6th lens (7) is optical glass HOYA S-NPH2, and the material of this glass filter (8) is optical glass Xiao Te D263T.
Described first lens (1) refractive index is 1.658435, and abbe number is 50.854579; The second lens (2) refractive index is 1.698945, and abbe number is 30.050548; The 3rd lens (3) refractive index is 1.784719, and abbe number is 25.720798; The 4th lens (5) refractive index is 1.953747, abbe number is that 32.318760, the five lens (6) refractive indexes are 1.772500, and abbe number is 49.624286, the 6th lens (7) refractive index is 1.922860, and abbe number is 18.896912.
Described optical lens assembly optics overall length is less than 24mm, wherein, and described first lens (1) front surface convex surface and protruding in object space, and protruding spherical radius is 16～17mm; Rear surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.7～3.9mm; The second lens (2) front surface upper and lower side is that planar central portion is convex surface and protruding in object space, and protruding spherical radius is 7.5～7.7mm; Rear surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.6～3.8mm; The 3rd lens (3) front surface is convex surface and protruding in object space, and protruding spherical radius is 16.5～16.7mm; Rear surface is plane; The 4th lens (5) front surface upper and lower side be planar central portion be concave surface and central fovea to object space, rear surface is convex surface and protruding in image space; The 5th lens (6) front surface be convex surface and middle cardiac prominence to object space, and protruding spherical radius is 41.3～41.5mm; Rear surface is convex surface and protruding in image space, and protruding spherical radius is 3.4～3.6mm; The 6th lens (7) front surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.4～3.6mm; Rear surface is convex surface and protruding in image space, and protruding spherical radius is 12.4～12.6mm.
The 4th described lens (5) are aspheric surface glass lens, and the 5th lens (6) are glass cement zoarium with the 6th lens (7).
The effective focal length of optical lens assembly of the present invention is 3.07mm, and back focal length is 4.4mm, and optics overall length is 23.8mm, and f-number F/NO is controlled at 2.2, ensures large aperture, and field angle is 150 degree, and various aberrations are well corrected, and obtains desirable optical property.For the exploitation of high-pixel wide-angle automotive visual system class electronic product provides solution.
Fig. 2 is modulation transfer function (Modulati on Transfer Function the is called for short MTF) curve map of optical lens assembly of the present invention, horizontal ordinate representation space frequency in figure, unit: line is to every millimeter (1p/mm); Ordinate represents the value of modulation transfer function (MTF), and the value of described MTF is used for evaluating the imaging clearly situation of lens assembly, and span is the imaging clearly ability of 0～1, MTF curve representative shot, to the reducing power of image.As can be seen from Figure 2, the MTF curve comparatively dense of each visual field meridian direction (T) and sagitta of arc direction (S), its expression: this lens assembly has good consistance on whole imaging surface, can imaging clearly on whole imaging surface, can meet the requirement that complementary metal oxide semiconductor (CMOS) (CMOS) and Charge Coupled Device (CCD) (CCD) image sensor receive.
Fig. 3 and Fig. 4 are respectively the curvature of field and the distortion figure of optical lens assembly of the present invention, can find out from Fig. 3 and Fig. 4, the curvature of field of this lens assembly is less than 0.2mm, distortion is less than 65%, can meet the requirement that complementary metal oxide semiconductor (CMOS) on market (CMOS) and Charge Coupled Device (CCD) (CCD) image sensor receive.
Fig. 5 is the relative exposure figure of optical lens assembly of the present invention, and in figure, horizontal ordinate represents the field range of camera lens, and ordinate represents camera lens brightness value, and span is 0～1.As can be seen from the figure visual field and visual field, edge in the middle of, brightness value is very high and difference value is little, its expression: it is good that this lens assembly has very high brightness and center range and edge extent brightness uniformity on whole imaging surface.
Known by above embodiment, by adopting aspherical lens to make the refraction of light through high-order curved surface, can guarantee that light accurately focuses on a bit, effectively eliminate the various aberrations of light, guarantee the image quality of camera lens; The height that camera lens can be effectively shortened in the collocation of each eyeglass by optical lens is less than 24mm, and field angle is 150 degree, and f-number is controlled at 2.2, ensures large aperture; Mid-by diaphragm, reduce the generation of various aberrations in lens system, ensure lens imaging quality; Two glass lenss adopt gummed mode, can improve the refractive index of lens edge part to light, and the edge imaging of camera lens is improved, and alleviate the weight of camera lens, effectively control lens length, reduce manufacturing cost simultaneously, enhance productivity.
The above, it is only better case study on implementation of the present invention, not technical scope of the present invention is imposed any restrictions, the technician of the industry, under the inspiration of the technical program, can make some distortion and amendment, any amendment, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, still all belong in the scope of technical solution of the present invention.
Claims (6)
1. an optical lens assembly, it is characterized in that: comprise fixed aperture, one group of lens, a glass filter, these group lens comprise the first lens being arranged in order to image space from object space on the axle of sharing the same light, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 4th lens surface is aspheric surface, and its aspheric surface formula is:
Wherein, Z represents the Z coordinate figure of lens surface each point, Y represents the Y-axis coordinate figure of each point on lens surface, CURV is the inverse of the radius-of-curvature of lens surface, K is circular cone coefficient, A, B, C, D, E, F, G, H are high-order asphericity coefficient, and the face shape parameter on the forward and backward surface of the 4th lens is respectively as table 1, table 2:
This fixed aperture is arranged between the 3rd lens and the 4th lens, after this glass filter is positioned at the 6th eyeglass, before the imaging surface of this optical lens assembly, wherein the center thickness of first lens is 0.79～0.82mm, the center thickness of the second lens is 1.52～1.54mm, the center thickness of the 3rd lens is 4.14～4.16mm, the center thickness of the 4th lens is 3.85～3.87mm, the center thickness of the 5th lens is 3.12～3.15mm, and the center thickness of the 6th lens is 0.72～0.76mm.
2. according to a kind of optical lens assembly claimed in claim 1, it is characterized in that: the material of described first lens is optical glass HOYA BACED5, the material of these the second lens is optical glass HOYA FD15, the material of the 3rd lens is optical glass HOYA FD110, the material of the 4th lens is optical glass HOYA TAFD45, the material of the 5th lens is optical glass HOYA TAF1, the material of the 6th lens is optical glass HOYA S-NPH2, and the material of this glass filter is optical glass Xiao Te D263T.
3. a kind of optical lens assembly according to claim 1, is characterized in that: described first lens refractive index is 1.658435, and abbe number is 50.854579; Second index of refraction in lens is 1.698945, and abbe number is 30.050548; The 3rd index of refraction in lens is 1.784719, and abbe number is 25.720798; The 4th index of refraction in lens is 1.953747, and abbe number is that 32.318760, the five index of refraction in lens are 1.772500, and abbe number is that 49.624286, the six index of refraction in lens are 1.922860, and abbe number is 18.896912.
4. according to the optical lens assembly described in claim 1～3 any one, it is characterized in that: described first lens front surface convex surface and protruding in object space, and protruding spherical radius is 16～17mm; Rear surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.7～3.9mm; The second lens front surface upper and lower side is that planar central portion is convex surface and protruding in object space, and protruding spherical radius is 7.5～7.7mm; Rear surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.6～3.8mm; The 3rd lens front surface is convex surface and protruding in object space, and protruding spherical radius is 16.5～16.7mm; Rear surface is plane; The 4th lens front surface upper and lower side be planar central portion be concave surface and central fovea to object space, rear surface is convex surface and protruding in image space; The 5th lens front surface be convex surface and middle cardiac prominence to object space, and protruding spherical radius is 41.3～41.5mm; Rear surface is convex surface and protruding in image space, and protruding spherical radius is 3.4～3.6mm; The 6th lens front surface upper and lower side be planar central portion be concave surface and central fovea to object space, and concave spherical surface radius is 3.4～3.6mm; Rear surface is convex surface and protruding in image space, and protruding spherical radius is 12.4～12.6mm.
5. optical lens assembly according to claim 1, the 4th lens are aspheric surface glass lens, the 5th lens and the 6th lens are glass cement zoarium.
6. optical lens assembly according to claim 1, is characterized in that: described optical lens assembly optics overall length is less than 24mm, and field angle is 150 degree, and f-number F/NO is controlled at 2.2, ensures high brightness.
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| CN201410062135.0A CN103984083B (en) | 2014-02-21 | 2014-02-21 | A kind of optical lens assembly |
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| CN201410062135.0A CN103984083B (en) | 2014-02-21 | 2014-02-21 | A kind of optical lens assembly |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04246606A (en) * | 1991-01-31 | 1992-09-02 | Copal Co Ltd | Super wide angle lens |
| US5666228A (en) * | 1995-09-28 | 1997-09-09 | Fuji Photo Optical Co., Ltd. | Retrofocus type lens |
| JP2001133685A (en) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Photographic lens, electronic still camera, and video camera |
| CN1332384A (en) * | 2000-01-20 | 2002-01-23 | 伊士曼柯达公司 | Reversing long-shot varifocus lens |
| CN102736218A (en) * | 2012-05-31 | 2012-10-17 | 舜宇光学(中山)有限公司 | 5-megapixel monitoring lens |
| CN103076668A (en) * | 2013-01-11 | 2013-05-01 | 哈尔滨工业大学 | High-resolution, high-illumination and economical optical system shared day and night |
-
2014
- 2014-02-21 CN CN201410062135.0A patent/CN103984083B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04246606A (en) * | 1991-01-31 | 1992-09-02 | Copal Co Ltd | Super wide angle lens |
| US5666228A (en) * | 1995-09-28 | 1997-09-09 | Fuji Photo Optical Co., Ltd. | Retrofocus type lens |
| JP2001133685A (en) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Photographic lens, electronic still camera, and video camera |
| CN1332384A (en) * | 2000-01-20 | 2002-01-23 | 伊士曼柯达公司 | Reversing long-shot varifocus lens |
| CN102736218A (en) * | 2012-05-31 | 2012-10-17 | 舜宇光学(中山)有限公司 | 5-megapixel monitoring lens |
| CN103076668A (en) * | 2013-01-11 | 2013-05-01 | 哈尔滨工业大学 | High-resolution, high-illumination and economical optical system shared day and night |
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| CN103984083B (en) | 2018-01-30 |
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