CN103984083B - A kind of optical lens assembly - Google Patents

A kind of optical lens assembly Download PDF

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CN103984083B
CN103984083B CN201410062135.0A CN201410062135A CN103984083B CN 103984083 B CN103984083 B CN 103984083B CN 201410062135 A CN201410062135 A CN 201410062135A CN 103984083 B CN103984083 B CN 103984083B
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lens
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msup
convex
optical
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CN103984083A (en
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罗杰
王廷伟
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Nanyang Jiayuan Intelligent Photoelectric Technology Co.,Ltd.
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Xiangyang Jin Xiang Optoelectronics Technology Inc Co
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Abstract

The present invention relates to the optical lens assembly of the pixel camera head group of 1/2.5 inch gage of electronics field high definition 5,000,000 for automotive visual system, including fixed aperture, one group of lens, one glass filter, this group of lens are included with the first lens being arranged in order on optical axis from object space to image space, second lens, 3rd lens, 4th lens, 5th lens, 6th lens, the collocation of each eyeglass can effectively shorten the height of camera lens, make refraction of the light by high-order curved surface by using an aspherical lens simultaneously, it may insure that light accurately focuses on a bit, effectively eliminate the various aberrations of light, ensure the imaging high-quality of camera lens;The height that camera lens can effectively be shortened by the collocation of each eyeglass of optical lens is less than 24mm, and the angle of visual field is 150 degree, and F-number F/NO is controlled 2.2;By being put in diaphragm, the generation that can reduce various aberrations in lens system ensures camera lens quality, reduces manufacturing cost.

Description

A kind of optical lens assembly
Technical field
The present invention relates to optics field, espespecially a kind of electronics field high definition 1/ for automotive visual system The optical lens assembly of the pixel camera head group of 2.5 inch gage 5,000,000.
Background technology
Economic fast development makes the living standard of people improve therewith, and automobile is more and more, is so made to road management Into very big pressure.Public transport is the indispensable vehicle in city, so government all advocates public traffic in priority all the time, while As a pith in the intelligent transportation rule in each city, it can so alleviate urban traffic pressure, avoid More accidents occur, and strengthen public traffic management, make people's trip safer.Certain traffic administration will also carry out comprehensive liter Level, more advanced monitoring system " vehicle-mounted monitoring " is developed comprehensively to be monitored exclusively for vehicle, enable administrative staff more and When apparent situation about understanding outside in-car car, and road can be guided, each city is stepped into a smoothly current ring Among border.
Vehicle-mounted monitoring introduces urban transportation, inherently welcomes the welcome of more car owners, and one can make path link suitable, alleviates Congestion in road, make smoothly to pass through and do not cause delay.Two can also provide road information for car owner, and some congestions of which road ahead make Other roads can be turned in time smoothly to pass through.The most important is just better able to guarantee driving safety.Vehicle-mounted monitoring should With very extensively, application at home has reached a climax, and is mainly used in public transport field and transport field.During this Vehicle-mounted monitoring is upgraded, and the single vehicle-mounted 3G that upgrades to from before is monitored, and can be realized remote monitoring, is single vehicle-mounted prison Control institute is irrealizable, while can carry out comprehensive understanding to driving conditions Information, traffic safety can be more at any time Monitored in real time in short time.High definition at present, the monitoring product of high pixel have become the main flow in monitoring market.It is but existing It is applied to the lens assembly such as China Patent No. in the camera module of the electronics field of automotive visual system 201110307278.X is 201310010341 with China Patent No., and China Patent No. is 201210180293 but in the presence of imaging picture The defects of element is low, and the angle of visual field is small, and optics is always grown up.To adapt to domestic market demand, it is necessary to develop the high pixel of design with reducing it For the purpose of production cost, and it is that 201110307278.X is with China Patent No. to solve current technology such as China Patent No. 201310010341, China Patent No. is that the new camera lens of 201210180293 these existing defects seizes market.
The content of the invention
It is contemplated that it is that the current technology such as China Patent No. of solution is that 201110307278.X is with China Patent No. 201310010341, China Patent No. is 201210180293 to have that imaging effect is poor, and the angle of visual field is small, and optics is always grown up various Defect, there is provided a kind of imaging effect is good, large aperture, the pixel lens assembly of optics 5,000,000 of high brightness.To achieve the above object, The technical solution adopted by the present invention is:A kind of optical lens assembly, including fixed aperture, one group of lens, a glass filter, This group of lens are included with the first lens being arranged in order on optical axis from object space to image space, and the second lens, the 3rd lens, the 4th is saturating Mirror, the 5th lens, the lens surface of the 6th lens the 4th are aspherical, and its aspherical formula is:
Wherein, Z represents the Z coordinate value of lens surface each point, and Y represents the Y-axis coordinate value of each point on lens surface, and CURV is The inverse of the radius of curvature of lens surface, K are circular cone coefficient, and A, B, C, D, E, F, G, H are order aspherical coefficients, the 4th lens Forward and backward surface face shape parameter respectively such as table 1, table 2 is shown:
The fixed aperture is arranged between the 3rd lens and the 4th lens, and the glass filter is located at after the 6th lens, And before the imaging surface of the optical lens assembly, wherein the center thickness of the first lens is 0.79~0.82mm, the second lens Center thickness is 1.52~1.54mm, and the center thickness of the 3rd lens is 4.14~4.16mm, and the center thickness of the 4th lens is 3.85~3.87mm, the center thicknesses of the 5th lens are 3.12~3.15mm, the center thicknesses of the 6th lens for 0.72~ 0.76mm。
Wherein, the material of the first described lens is optical glass HOYA BACED5, and the material of second lens is optics Glass HOYA FD15, the material of the 3rd lens is optical glass HOYA FD110, and 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, the material of the glass filter is optical glass Xiao Te D263T.
Wherein, the first described index of refraction in lens is 1.658435, abbe number 50.854579;Second lens reflect Rate is 1.698945, abbe number 30.050548;3rd index of refraction in lens is 1.784719, and abbe number is 25.720798;4th index of refraction in lens is 1.953747, abbe number 32.318760, and the 5th index of refraction in lens is 1.772500, abbe number 49.624286, the 6th index of refraction in lens is 1.922860, abbe number 18.896912.
Wherein, the first described lens front surface is convex spherical and is convex to object space, and convex spherical radius is 16~17mm;Afterwards Surface upper and lower side is that planar central portion is concave spherical surface and center concaves towards object space, and concave spherical surface radius is 3.7~3.9mm;Second Lens front surface upper and lower side is that planar central portion is convex spherical and is convex to object space, and convex spherical radius is 7.5~7.7mm;Afterwards Surface upper and lower side is that planar central portion is concave spherical surface and center concaves towards object space, and concave spherical surface radius is 3.6~3.8mm;3rd Lens front surface is convex spherical and is convex to object space, and convex spherical radius is 16.5~16.7mm;Surface is plane afterwards;4th lens Preceding surface upper and lower side is that planar central portion is concave surface and center concaves towards object space, and rear surface is convex surface and is convex to image space;5th is saturating The preceding surface of mirror is convex spherical and center is convex to object space, and convex spherical radius is 41.3~41.5mm;Surface is convex spherical and convex afterwards To image space, and convex spherical radius is 3.4~3.6mm;6th lens front surface upper and lower side be planar central portion be concave spherical surface and Center concaves towards object space, and concave spherical surface radius is 3.4~3.6mm;Surface is convex spherical and is convex to image space afterwards, and convex spherical radius is 12.4~12.6mm.
Wherein, the 4th described lens are aspherical glass lens, and the 5th lens and the 6th lens are glass veneer.
Wherein, described optical lens assembly optics overall length is less than 24mm, and the angle of visual field is 150 degree, F-number F/NO controls 2.2, ensure high brightness.
Using having the beneficial effect that after above-mentioned technical proposal:The lens group of the present invention is saturating using a Glass aspheric Mirror and five glass spherical lens mix and match, with respect to having the high advantage of brightness for the optical lens of other lenses group, together When by using aspherical lens make light pass through high-order curved surface refraction, it can be ensured that light accurately focuses on a bit, has The various aberrations of the elimination light of effect, it is ensured that the high-quality of imaging.Can be effective by the collocation of each eyeglass of optical lens The height of shortening camera lens be less than 24mm, the angle of visual field is 150 degree, and F-number F/NO controls are 2.2, guarantee high brightness;Pass through light Put in door screen, the generation of various aberrations in lens system can be reduced, ensure lens imaging quality, improve production efficiency.
It will be become more fully apparent by following description and with reference to accompanying drawing, the present invention, these accompanying drawings are used to explain the present invention Embodiment.
Brief description of the drawings
The structural representation of Fig. 1 optical lens groups of the present invention;
MTF (modulated optical transmission function) schematic diagram of Fig. 2 optical lens assemblies of the present invention
The curvature of field schematic diagram of Fig. 3 optical lens assemblies of the present invention
The distortion schematic diagram of Fig. 4 optical lens assemblies of the present invention
The relative illumination schematic diagram of Fig. 5 optical lens assemblies of the present invention
Accompanying drawing marks explanation:The lens of 1- first;The lens of 2- second;The lens of 3- the 3rd;4- fixed apertures;
The lens of 5- the 4th;The lens of 6- the 5th;The lens of 7- the 6th;8- optical filters;9- image spaces.
Embodiment
The embodiment that the invention will now be described in detail with reference to the accompanying drawings:As shown in figure 1, a kind of optical lens assembly, Including fixed aperture (4), one group of lens, a glass filter (8), this group of lens include with optical axis from object space to image space (9) the first lens (1) being arranged in order, 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 aspheric ball, and its aspherical formula is:
Wherein, Z represents the Z coordinate value of lens surface each point, and Y represents the Y-axis coordinate value of each point on lens surface, and CURV is The inverse of the radius of curvature of lens surface, K are circular cone coefficient, and A, B, C, D, E, F, G, H are order aspherical coefficients, the 4th lens (5) the face shape parameter on forward and backward surface is respectively such as table 1, shown in table 2:
The fixed aperture (4) is arranged between the 3rd lens (3) and the 4th lens (5), and the glass filter (8) is positioned at the After six lens (7), and before the imaging surface (9) of the optical lens assembly, wherein the center thickness of the first lens (1) is 0.79~0.82mm, preferably 0.81mm;The center thickness of second lens (2) is 1.52~1.54mm, preferably 1.53mm;3rd is saturating The center thickness of mirror (3) is 4.14~4.16mm, preferably 4.155mm;The center thickness of 4th lens (5) be 3.85~ 3.87mm, preferably 3.86mm;The center thickness of 5th lens (6) is 3.12~3.15mm, preferably 3.13mm;6th lens (7) Center thickness be 0.72~0.76mm, preferably 0.73mm.
The material of described the first lens (1) is optical glass HOYA BACED5, and the material of second lens (2) is light Glass HOYA FD15 are learned, the material of the 3rd lens (3) is optical glass HOYA FD110, and the material of the 4th lens (5) is Optical glass HOYA TAFD45, the materials of the 5th lens (6) are optical glass HOYA TAF1, the material of the 6th lens (7) Expect that for optical glass HOYA S-NPH2, the material of the glass filter (8) is optical glass Xiao Te D263T.
Described the first lens (1) refractive index is 1.658435, abbe number 50.854579;Second lens (2) reflect Rate is 1.698945, abbe number 30.050548;3rd lens (3) refractive index is 1.784719, and abbe number is 25.720798;4th lens (5) refractive index is 1.953747, abbe number 32.318760, and the 5th lens (6) refractive index is 1.772500, abbe number 49.624286, the 6th lens (7) refractive index is 1.922860, abbe number 18.896912.
Described optical lens assembly optics overall length is less than 24mm, wherein, described the first lens (1) preceding surface is convex surface Ball and object space is convex to, and convex spherical radius is 16~17mm;Surface upper and lower side is that planar central portion is concave spherical surface and center afterwards Object space is concaved towards, and concave spherical surface radius is 3.7~3.9mm;The preceding surface upper and lower side of second lens (2) is that planar central portion is convex ball Face and object space is convex to, and convex spherical radius is 7.5~7.7mm;Afterwards surface upper and lower side be planar central portion be concave spherical surface and in The heart concaves towards object space, and concave spherical surface radius is 3.6~3.8mm;Convex spherical is in 3rd lens (3) preceding surface and is convex to object space, and convex Spherical radius is 16.5~16.7mm;Surface is plane afterwards;The 4th preceding surface upper and lower side of lens (5) is that planar central portion is recessed Face and center concave towards object space, and rear surface is convex surface and is convex to image space;5th lens (6) preceding surface is convex spherical and center is convex to thing Side, and convex spherical radius is 41.3~41.5mm;Surface is convex spherical and is convex to image space afterwards, and convex spherical radius be 3.4~ 3.6mm;The 6th preceding surface upper and lower side of lens (7) is that planar central portion is concave spherical surface and center concaves towards object space, and concave spherical surface half Footpath is 3.4~3.6mm;Surface is convex spherical and is convex to image space afterwards, and convex spherical radius is 12.4~12.6mm.
The 4th described lens (5) are aspherical glass lens, and the 5th lens (6) are that glass is glued with the 6th lens (7) Body.
The effective focal length of optical lens assembly of the present invention is 3.07mm, and back focal length 4.4mm, optics overall length is 23.8mm, F-number F/NO controls ensure large aperture, the angle of visual field is 150 degree, and various aberrations are well corrected, and is managed 2.2 The optical property thought.Exploitation for high-pixel wide-angle automotive visual system electronic product provides solution.
Fig. 2 be the present invention optical lens assembly modulation transfer function (Modulation Transfer Function, Abbreviation MTF) curve map, abscissa representation space frequency in figure, unit:Line is to every millimeter (lp/mm);Ordinate represents that modulation passes The value of delivery function (MTF), the value of the MTF are used for evaluating the imaging clearly situation of lens assembly, and span is 0~1, MTF Curve represents the imaging clearly ability of camera lens, to the reducing power of image.Figure it is seen that each visual field meridian direction (T) and The MTF curve comparatively dense in sagitta of arc direction (S), it is represented:The lens assembly has good uniformity, energy on whole imaging surface It is enough to be clearly imaged on whole imaging surface, it disclosure satisfy that complementary metal oxide semiconductor (CMOS) and charge coupling device (CCD) requirement that image sensor receives.
Fig. 3 and Fig. 4 is respectively the curvature of field and distortion figure of optical lens assembly of the present invention, and this is can be seen that from Fig. 3 and Fig. 4 The curvature of field of lens assembly is less than 0.2mm, and distortion is less than 65%, disclosure satisfy that in the market complementary metal oxide semiconductor (CMOS) And the requirement that charge coupling device (CCD) image sensor receives.
Fig. 5 is the relative illumination figure of optical lens assembly of the present invention, and abscissa represents the field range of camera lens in figure, indulges and sits Mark represents camera lens brightness value, and span is 0~1.As can be seen from the figure visual field and peripheral field among, brightness value it is very high and Difference value is small, and it is represented:The lens assembly has very high brightness on whole imaging surface and center range and edge extent are bright It is good to spend uniformity.
By above embodiment, make refraction of the light by high-order curved surface by using aspherical lens, It may insure that light accurately focuses on a bit, effectively eliminate the various aberrations of light, it is ensured that the image quality of camera lens;Pass through The height that the collocation of each eyeglass of optical lens can effectively shorten camera lens is less than 24mm, and the angle of visual field is 150 degree, F-number Control ensures large aperture 2.2;By being put in diaphragm, the generation of various aberrations in lens system is reduced, ensures lens imaging product Matter;Two glass lens use glued mode, can improve refractive index of the lens edge part to light, make the edge imaging of camera lens Improve, mitigate the weight of camera lens, effectively control lens length, while reduce manufacturing cost, improve production efficiency.
It is described above, only it is the preferable case study on implementation of the present invention, is not intended to limit the scope of the present invention, this The technical staff of industry, under the inspiration of the technical program, some deformations and modification, every skill according to the present invention can be made Any modification, equivalent variations and the modification that embodiment of the art essence to more than is made, still belong to the model of technical solution of the present invention In enclosing.

Claims (5)

  1. A kind of 1. optical lens assembly, it is characterised in that:It is saturating including fixed aperture, one group of lens, a glass filter, the group Mirror is included with the first lens being arranged in order on optical axis from object space to image space, the second lens, the 3rd lens, the 4th lens, and the 5th Lens, the 6th lens, the 4th lens surface are aspherical, and its aspherical formula is:
    <mfenced open = "" close = ""> <mtable> <mtr> <mtd> <mrow> <mi>Z</mi> <mo>=</mo> <mfrac> <mrow> <mo>(</mo> <mi>C</mi> <mi>U</mi> <mi>R</mi> <mi>V</mi> <mo>)</mo> <msup> <mi>Y</mi> <mn>2</mn> </msup> </mrow> <mrow> <mn>1</mn> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mo>(</mo> <mn>1</mn> <mo>+</mo> <mi>K</mi> <mo>)</mo> <msup> <mrow> <mo>(</mo> <mi>C</mi> <mi>U</mi> <mi>R</mi> <mi>V</mi> <mo>)</mo> </mrow> <mn>2</mn> </msup> <msup> <mi>Y</mi> <mn>2</mn> </msup> <mo>)</mo> </mrow> <mrow> <mn>1</mn> <mo>/</mo> <mn>2</mn> </mrow> </msup> </mrow> </mfrac> <mo>+</mo> <mrow> <mo>(</mo> <mi>A</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>2</mn> </msup> <mo>+</mo> <mrow> <mo>(</mo> <mi>B</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>4</mn> </msup> <mo>+</mo> <mrow> <mo>(</mo> <mi>C</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>6</mn> </msup> <mo>+</mo> <mrow> <mo>(</mo> <mi>D</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>8</mn> </msup> <mo>+</mo> <mrow> <mo>(</mo> <mi>E</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>10</mn> </msup> <mo>+</mo> <mrow> <mo>(</mo> <mi>F</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>12</mn> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>+</mo> <mrow> <mo>(</mo> <mi>G</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>14</mn> </msup> <mo>+</mo> <mrow> <mo>(</mo> <mi>H</mi> <mo>)</mo> </mrow> <msup> <mi>Y</mi> <mn>16</mn> </msup> </mrow> </mtd> </mtr> </mtable> </mfenced>
    Wherein, Z represents the Z coordinate value of lens surface each point, and Y represents the Y-axis coordinate value of each point on lens surface, and CURV is lens The inverse of the radius of curvature on surface, K are circular cone coefficient, and A, B, C, D, E, F, G, H are order aspherical coefficients, the 4th lens The face shape parameter on forward and backward surface is respectively such as table 1, table 2:
    The fixed aperture is arranged between the 3rd lens and the 4th lens, and the glass filter is located at after the 6th lens, and should Before the imaging surface of optical lens assembly, wherein the center thickness of the first lens is 0.79~0.82mm, the center of the second lens Thickness is 1.52~1.54mm, and the center thickness of the 3rd lens is 4.14~4.16mm, and the center thickness of the 4th lens is 3.85 ~3.87mm, the center thicknesses of the 5th lens are 3.12~3.15mm, and the center thicknesses of the 6th lens is 0.72~0.76mm, institute The first lens front surface stated is convex spherical and is convex to object space, and convex spherical radius is 16~17mm;Surface upper and lower side is flat afterwards Face center section is concave spherical surface and center concaves towards object space, and concave spherical surface radius is 3.7~3.9mm;Above and below second lens front surface Hold and be convex spherical for planar central portion and be convex to object space, and convex spherical radius is 7.5~7.7mm;Surface upper and lower side is flat afterwards Face center section is concave spherical surface and center concaves towards object space, and concave spherical surface radius is 3.6~3.8mm;3rd lens front surface is convex Sphere and object space is convex to, and convex spherical radius is 16.5~16.7mm;Surface is plane afterwards;4th lens front surface upper and lower side is Planar central portion is concave surface and center concaves towards object space, and rear surface is convex surface and is convex to image space;5th lens front surface is convex ball Face and center are convex to object space, and convex spherical radius is 41.3~41.5mm;Surface is convex spherical and is convex to image space, and convex spherical afterwards Radius is 3.4~3.6mm;6th lens front surface upper and lower side is that planar central portion is concave spherical surface and center concaves towards object space, and Concave spherical surface radius is 3.4~3.6mm;Surface is convex spherical and is convex to image space afterwards, and convex spherical radius is 12.4~12.6mm.
  2. 2. according to a kind of optical lens assembly described in claim 1, it is characterised in that:The material of the first described lens is light Glass HOYA BACED5 are learned, the material of second lens is optical glass HOYA FD15, and the material of the 3rd lens is optics Glass HOYA FD110, the material of the 4th lens is optical glass HOYA TAFD45, and the material of the 5th lens is optics glass Glass HOYA TAF1, the material of the 6th lens is optical glass HOYA S-NPH2, and the material of the glass filter is optics glass Glass Xiao Te D263T.
  3. A kind of 3. optical lens assembly according to claim 1, it is characterised in that:The first described index of refraction in lens is 1.658435 abbe number 50.854579;Second index of refraction in lens is 1.698945, abbe number 30.050548;The Three index of refraction in lens are 1.784719, abbe number 25.720798;4th index of refraction in lens is 1.953747, abbe number For 32.318760, the 5th index of refraction in lens is 1.772500, abbe number 49.624286, and the 6th index of refraction in lens is 1.922860 abbe number 18.896912.
  4. 4. optical lens assembly according to claim 1, the 4th lens are aspherical glass lens, the 5th lens and the 6th Lens are glass veneer.
  5. 5. optical lens assembly according to claim 1, it is characterised in that:Described optical lens assembly optics overall length is small In 24mm, the angle of visual field is 150 degree, and F-number F/NO is controlled 2.2.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666228A (en) * 1995-09-28 1997-09-09 Fuji Photo Optical Co., Ltd. Retrofocus type lens
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2599311B2 (en) * 1991-01-31 1997-04-09 株式会社コパル Super wide angle lens
JP3491578B2 (en) * 1999-11-02 2004-01-26 松下電器産業株式会社 Imaging lens, electronic still camera and video camera

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666228A (en) * 1995-09-28 1997-09-09 Fuji Photo Optical Co., Ltd. Retrofocus type lens
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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