CN201917707U - Optical camera system - Google Patents
Optical camera system Download PDFInfo
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- CN201917707U CN201917707U CN2010206609307U CN201020660930U CN201917707U CN 201917707 U CN201917707 U CN 201917707U CN 2010206609307 U CN2010206609307 U CN 2010206609307U CN 201020660930 U CN201020660930 U CN 201020660930U CN 201917707 U CN201917707 U CN 201917707U
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Abstract
The utility model discloses an optical camera system, which comprises following objects from object side to image side: a first lens with negative refraction power, a second lens with positive refraction power, a third lens with positive refraction power, and a fourth lens with negative refraction power, wherein the object side surface of the first lens is a convex surface and the image side surface of the first lens is a concave surface; both the object side surface and the image side surface of the third lens are aspheric surfaces; and the image side surface of the fourth lens is a concave surface, and either the object side surface or the image side surface of the fourth lens is an aspheric surface. In the system, four lenses with refraction power are employed; the mirror spacing between the first lens and the second lens is T12, the integral focal length of the optical camera system is f, and the central thickness of the first lens is CT1. The system further comprises an aperture, the distance between the aperture and the imaging surface and on optical axis is SL, the distance between the object side surface and the image side surface of the first lens on optical axis is TTL, and the following conditions are met: T12/f is greater than 0.1 and lower than 0.3; CT1/f is greater than 0.30 and lower than 0.75; and SL/TTL is greater than 0.52 and lower than 0.82. The optical camera system is endowed with a larger visual angle; the volume of a lens can be reduced effectively; and higher image interpreting power can be obtained.
Description
Technical field
The utility model relates to a kind of photo-optic system that is applied to the miniaturization four-piece type of electronic product.
Background technology
Recent years, rise along with portable electronic product with camera function, the demand of miniaturization pick-up lens day by day improves, and the photosensory assembly of general pick-up lens is nothing more than being photosensitive coupling component (Charge Coupled Device, CCD) or complementary matal-oxide semiconductor assembly (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor) two kind, and because manufacture of semiconductor development of technology, make the picture element area of photosensory assembly dwindle, the miniaturization pick-up lens develops to high picture element field gradually, therefore, the requirement to image quality also increases day by day.
The miniaturization pick-up lens that tradition is equipped on the portable electronic product adopts the three-chip type lens to rent structure more, lens combination is born second lens of refracting power and the 3rd lens of the positive refracting power of a tool from thing side to first lens, the tool that as side are the positive refracting power of a tool in regular turn, as United States Patent (USP) the 7th, shown in 145, No. 736.
Under the trend of the progress of process technique and the lightening development of electronic product, the picture element size of photosensory assembly is constantly dwindled, and system improves more to the requirement of image quality, and common three-chip type lens combination can't satisfy the more demand of high-order camera lens module.
United States Patent (USP) the 7th, 365, disclosed a kind of four-piece type lens combination for No. 920, wherein first lens and second lens become Doublet (doublet) with mutual bonding of two sheet glass spherical mirrors, in order to color difference eliminating, but the method has its shortcoming, the one, and too much glass spherical mirror configuration makes and the degree of freedom in system deficiency causes the optics total length of system to be difficult for shortening; The 2nd, the processing procedure that glass mirror binds is difficult for, and forms the difficulty on making easily.
The utility model content
Technical problem to be solved in the utility model provides a kind of photo-optic system that is made of four lens, and it has bigger visual angle, dwindles the camera lens volume effectively, and significantly improves the resolving power of system.
For solving the problems of the technologies described above, photo-optic system of the present utility model is extremely comprised as side in regular turn by the thing side: first lens of the negative refracting power of a tool, and its thing side surface is a convex surface, is concave surface as side surface; Second lens of the positive refracting power of one tool; The 3rd lens of the positive refracting power of one tool, its thing side surface be all aspheric surface as side surface; The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, and the thing side surface of described the 4th lens be all aspheric surface as side surface; The lens of tool refracting power are four in the described photo-optic system, and system also is provided with an aperture; Mirror spacing between described first lens and second lens is T12, the whole focal length of photo-optic system is f, the center thickness of first lens is CT1, aperture to the distance of imaging surface on optical axis is SL, the thing side surface of first lens is TTL to the distance of imaging surface on optical axis, and its pass is: 0.1＜T12/f＜0.3; 0.30＜CT1/f＜0.75; 0.52＜SL/TTL＜0.82.
When 0.1＜T12/f＜0.3, help revising the higher order aberratons of photo-optic system, and make the mirror configuration set balance comparatively of this photo-optic system, help shortening the optics total length of this photo-optic system, to keep the miniaturization of camera lens, wherein preferably satisfy and concern 0.07＜T12/f＜0.50 o'clock, this photo-optic system can shorten the optics total length effectively and favorable imaging quality is provided; When 0.30＜CT1/f＜0.75, the lens thickness size of described first lens is comparatively suitable, and the difficulty that can reduce in the manufacturing is made yield to obtain higher eyeglass; When 0.52＜SL/TTL＜0.82, can increase Wide-angle, help to receive the correction of poor (Chromatic Aberration of Magnification), and such configuration can effectively reduce the susceptibility of system to distorting (Distortion) and multiplying power look.
In the photo-optic system of the present utility model, the described first lens tool is born refracting power, and its thing side surface is a convex surface and be concave surface as side surface, helps enlarging the field angle of photo-optic system.The positive refracting power of the described second lens tool for system provides required part refracting power, helps to shorten the total length of photo-optic system.The positive refracting power of described the 3rd lens tool can distribute the positive refracting power of second lens effectively, to reduce the susceptibility of photo-optic system.In the utility model photo-optic system, when being all convex surface, help to strengthen the positive refracting power of the 3rd lens when the thing side surface of described the 3rd lens and as side surface, can further shorten the total length of photo-optic system.Described the 4th lens tool is born refracting power, and it is a concave surface as side surface, and the principal point (Principal Point) that can make photo-optic system helps shortening the optics total length of photo-optic system away from imaging surface, to realize the miniaturization of photo-optic system.In addition, can be provided with the point of inflexion on described the 4th lens, can more effectively suppress light and incide angle on the photosensory assembly from the axle visual field, and the aberration of modified off-axis visual field further.
In the utility model photo-optic system, the focal length of described second lens is f2, the focal length of the 3rd lens is f3, both sides relation satisfies 0.2＜f3/f2＜0.7 o'clock, can make the refracting power of the effective distribution system of the 3rd lens, avoid the refracting power of single lens excessive and then reduce the susceptibility of photo-optic system.
In the utility model photo-optic system, has air clearance between described first lens and this second lens, the center thickness of first lens is CT1, the center thickness of second lens is CT2, both satisfy and to concern 0.2＜CT2/CT1＜0.50 o'clock, it is excessive or too small that the thickness of first lens and second lens is unlikely to, and helps the assembled configuration of each lens.
In the utility model photo-optic system, the focal length of described first lens is f1, and the focal length of the 4th lens is f4, and both satisfy and to concern 0.2＜f4/f1＜0.6 o'clock, the refracting power of first lens and the 4th lens disposes comparatively balance, helps the higher order aberratons of this photo-optic system of revisal.In addition, when both satisfy when concerning 0.2＜f4/f1＜0.45 the revisal better effects if of photo-optic system higher order aberratons.
In the utility model photo-optic system, the maximum magnitude part that described the 3rd lens pass through as the side surface glazed thread and the vertical range of optical axis are Y32, the 3rd lens are as being the position of Y32 and to be tangential on the 3rd lens be SAG32 as the distance between the tangent plane on side surface optical axis summit apart from optical axis on the side surface, both satisfy and to concern 0.4＜SAG32/Y32＜0.6 o'clock, can make the too bending of shape of the 3rd lens, except that making that helps lens and moulding, more help to reduce each required space of entirety of lens package configuration, make the configuration of mirror group more compact.
In the utility model photo-optic system, the abbe number of described the 3rd lens is V3, and the abbe number of the 4th lens is V4, and both satisfy and to concern and 30＜V3-V4＜42 o'clock help the correction of aberration in this photo-optic system.
In the utility model photo-optic system, the thing side surface radius-of-curvature of described first lens is R1, first lens be R2 as the side surface radius-of-curvature, both satisfy and to concern and 2.0＜R1/R2＜3.0 o'clock help the revisal of this photo-optic system spherical aberration (Spherical Aberration).
The imaging surface place of the utility model photo-optic system is provided with a sense electronics optical assembly, the thing side surface of described first lens to the distance of imaging surface on optical axis is TTL, long half of the effective picture element of sense electronics optical assembly zone diagonal line is ImgH, both satisfy and to concern TTL/ImgH＜3.8 o'clock, help keeping the miniaturization of this photo-optic system, be convenient to be applied on the frivolous portable electronic product.
Because adopt said structure and configuration, the utility model can effectively dwindle the volume of camera lens, has bigger visual angle, reduce the susceptibility of system, more can obtain higher resolving power simultaneously.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
Figure 1A is the optical system synoptic diagram of the utility model first embodiment;
Figure 1B is the aberration curve figure of the utility model first embodiment;
Fig. 1 C is the SAG32 of the utility model first embodiment and the synoptic diagram of Y32;
Fig. 2 A is the optical system synoptic diagram of the utility model second embodiment;
Fig. 2 B is the aberration curve figure of the utility model second embodiment;
Fig. 3 A is the optical system synoptic diagram of the utility model the 3rd embodiment;
Fig. 3 B is the aberration curve figure of the utility model the 3rd embodiment.
Wherein description of reference numerals is as follows:
Aperture 100,200,300;
First lens 110,210,310;
Thing side surface 111,211,311; Picture side surface 112,212,312;
Second lens 120,220,320;
Thing side surface 121,221,321; Picture side surface 122,222,322;
The 3rd lens 130,230,330;
Thing side surface 131,231,331; Picture side surface 132,232,332;
The 4th lens 140,240,340;
Thing side surface 141,241,341; Picture side surface 142,242,342;
Optical axis 150,250,350;
Infrared ray filtering optical filter (IR Filter) 170,270,370;
Imaging surface 190,290,390;
The center thickness CT1 of first lens;
The center thickness CT2 of second lens;
The whole focal length f of photo-optic system;
The focal distance f 1 of first lens;
The focal distance f 2 of second lens;
The focal distance f 3 of the 3rd lens;
The focal distance f 4 of the 4th lens;
Half long ImgH of the effective picture element of sense electronics optical assembly zone diagonal line;
The thing side surface radius of curvature R 1 of first lens;
The picture side surface radius of curvature R 2 of first lens;
The maximum magnitude part that the 3rd lens pass through as the side surface glazed thread and the vertical range Y32 of optical axis;
The 3rd lens as on the side surface apart from optical axis be the position of Y32 and be tangential on the 3rd lens as between the tangent plane on side surface optical axis summit apart from SAG32;
Aperture to imaging surface on optical axis apart from SL;
Mirror spacing T12 between first lens and second lens;
The thing side surface of first lens to imaging surface on optical axis apart from TTL;
The abbe number V3 of the 3rd lens;
The abbe number V4 of the 4th lens.
Embodiment
The photo-optic system of the utility model first embodiment sees also Figure 1A, and the aberration curve of first embodiment sees also Figure 1B, and the photo-optic system of first embodiment extremely comprises as side in regular turn from the thing side:
The 3rd lens 130 of the positive refracting power of one tool, its material is plastics, the thing side surface 131 of the 3rd lens 130 is a convex surface, is convex surface as side surface 132, in addition the thing side surface 131 of the 3rd lens 130 with all be made as aspheric surface as side surface 132;
The 4th lens 140 of the negative refracting power of one tool, its material is plastics, the thing side surface 141 of the 4th lens 140 is a convex surface, picture side surface 142 is a concave surface, in addition the thing side surface 141 of the 4th lens 140 with all be made as aspheric surface as side surface 142, and the thing side surface 141 of the 4th lens 140 with all be provided with the point of inflexion as side surface 142;
(0, it is located between second lens 120 and the 3rd lens 130 one aperture 1;
One infrared ray filtering optical filter (IR-filter) 170, it is located between the 4th lens 140 picture side surfaces 142 and the imaging surface 190, and the material of infrared ray filtering optical filter 170 is glass and the focal length that does not influence this photo-optic system.
The equation of above-mentioned aspheric curve is expressed as follows:
Wherein:
X: be the point of Y apart from optical axis on the aspheric surface, itself and the relative height that is tangential on the tangent plane on summit on the aspheric surface optical axis;
Y: the point on the aspheric curve and the distance of optical axis;
K: conical surface coefficient;
Ai: i rank asphericity coefficient.
Among first embodiment, the focal length of whole photo-optic system is f, and its pass is: f=3.02.
Among first embodiment, the f-number of whole photo-optic system (f-number) is Fno, and its pass is: Fno=2.05.
Among first embodiment, half of the maximum visual angle of whole photo-optic system is HFOV, and its pass is: HFOV=37.4.
Among first embodiment, the abbe number of the 3rd lens 130 is V3, and the abbe number of the 4th lens 140 is V4, and its pass is: V3-V4=32.5.
Among first embodiment, the mirror spacing between first lens 110 and second lens 120 is T12, and the whole focal length of photo-optic system is f, and its pass is: T12/f=0.19.
Among first embodiment, the center thickness of first lens 110 is CT1, and the whole focal length of photo-optic system is f, and its pass is: CT1/f=0.56.
Among first embodiment, the center thickness of first lens 110 is CT1, and the center thickness of second lens 120 is CT2, and its pass is: CT2/CT1=0.29.
Among first embodiment, thing side surface 111 radius-of-curvature of first lens 110 are R1, first lens 110 be R2 as side surface 112 radius-of-curvature, its pass is: R1/R2=2.55.
Among first embodiment, the focal length of second lens 120 is f2, and the focal length of the 3rd lens 130 is f3, and its pass is: f3/f2=0.43.
Among first embodiment, the focal length of first lens 110 is f1, and the focal length of the 4th lens 140 is f4, and its pass is: f4/f1=0.38.
Among first embodiment, the maximum magnitude part of passing through as side surface 132 glazed threads of the 3rd lens 130 and the vertical range of optical axis 150 are Y32, the 3rd lens 130 as being SAG32 for the position of Y32 with the distance that is tangential on the 3rd lens 130 apart from optical axis 150 on the side surface 132 as the tangent plane on optical axis 150 summits of side surface 132, its pass is: SAG32/Y32=0.52, and shown in Fig. 1 C.
Among first embodiment, aperture 100 to the distance of imaging surface 190 on optical axis 150 is SL, and the thing side surface 111 of first lens 110 is TTL to the distance of imaging surface 190 on optical axis 150, and its pass is: SL/TTL=0.64.
Among first embodiment, the thing side surface 111 of first lens 110 to the distance of imaging surface 190 on optical axis 150 is TTL, photo-optic system also is provided with a sense electronics optical assembly (not drawing on the figure) at imaging surface 190 places, long half of the effective picture element of sense electronics optical assembly zone diagonal line is ImgH, and its pass is: TTL/ImgH=3.21.
The detailed structured data of first embodiment is as shown in the table 1, and its aspherical surface data is as shown in the table 2, and wherein, the unit of radius-of-curvature, thickness and focal length is mm.
The structured data of table 1 first embodiment
Annotate: the reference wavelength of table 1 is d-line 587.6nm
The aspherical surface data of table 2 first embodiment
The photo-optic system of the utility model second embodiment sees also Fig. 2 A, and the aberration curve of second embodiment sees also Fig. 2 B, and the photo-optic system of second embodiment extremely comprises as side in regular turn from the thing side:
The 3rd lens 230 of the positive refracting power of one tool, its material is plastics, the thing side surface 231 of the 3rd lens 230 is a convex surface, is convex surface as side surface 232, in addition the thing side surface 231 of the 3rd lens 230 with all be made as aspheric surface as side surface 232;
The 4th lens 240 of the negative refracting power of one tool, its material is plastics, the thing side surface 241 of the 4th lens 240 is a concave surface, picture side surface 242 is a concave surface, in addition the thing side surface 241 of the 4th lens 240 with all be made as aspheric surface as side surface 242, and the thing side surface 241 of the 4th lens 240 with all be provided with the point of inflexion as side surface 242;
One aperture 200, it is located between first lens 210 and second lens 220;
One infrared ray filtering optical filter (IR-filter) 270, it is located between the 4th lens 240 picture side surfaces 242 and the imaging surface 290, and the material of infrared ray filtering optical filter 270 is glass and the focal length that does not influence this photo-optic system.
The equational expression of the aspheric curve of second embodiment is as the form of first embodiment.
Among second embodiment, the focal length of whole photo-optic system is f, and its pass is: f=3.11.
Among second embodiment, the f-number of whole photo-optic system (f-number) is Fno, and its pass is: Fno=2.40.
Among second embodiment, half of the maximum visual angle of whole photo-optic system is HFOV, and its pass is: HFOV=36.5.
Among second embodiment, the abbe number of the 3rd lens 230 is V3, and the abbe number of the 4th lens 240 is V4, and its pass is: V3-V4=32.5.
Among second embodiment, the mirror spacing between first lens 210 and second lens 220 is T12, and the whole focal length of photo-optic system is f, and its pass is: T12/f=0.15.
Among second embodiment, the center thickness of first lens 210 is CT1, and the whole focal length of photo-optic system is f, and its pass is: CT1/f=0.58.
Among second embodiment, the center thickness of first lens 210 is CT1, and the center thickness of second lens 220 is CT2, and its pass is: CT2/CT1=0.34.
Among second embodiment, thing side surface 211 radius-of-curvature of first lens 210 are R1, first lens 210 be R2 as side surface 212 radius-of-curvature, its pass is: R1/R2=2.69.
Among second embodiment, the focal length of second lens 220 is f2, and the focal length of the 3rd lens 230 is f3, and its pass is: f3/f2=0.57.
Among second embodiment, the focal length of first lens 210 is f1, and the focal length of the 4th lens 240 is f4, and its pass is: f4/f1=0.33.
Among second embodiment, the maximum magnitude part of passing through as side surface 232 glazed threads of the 3rd lens 230 and the vertical range of optical axis 250 are Y32, the 3rd lens 230 as being SAG32 for the position of Y32 with the distance that is tangential on the 3rd lens 230 apart from optical axis 250 on the side surface 232 as the tangent plane on optical axis 250 summits of side surface 232, its relational expression is: SAG32/Y32=0.49.Need to prove that the synoptic diagram of this SAG32 and Y32 is similar to first embodiment (being Fig. 1 C), so no longer draw at this.
Among second embodiment, aperture 200 to the distance of imaging surface 290 on optical axis 250 is SL, and the thing side surface 211 of first lens 210 is TTL to the distance of imaging surface 290 on optical axis 250, and its pass is: SL/TTL=0.71.
Among second embodiment, the thing side surface 211 of first lens 210 to the distance of imaging surface 290 on optical axis 250 is TTL, photo-optic system also is provided with a sense electronics optical assembly (not drawing on the figure) at imaging surface 290 places, long half of the effective picture element of sense electronics optical assembly zone diagonal line is ImgH, and its relational expression is: TTL/ImgH=3.29.
The detailed structured data of second embodiment is as shown in the table 3, and its aspherical surface data is as shown in the table 4, and wherein, the unit of radius-of-curvature, thickness and focal length is mm.
The structured data of table 3 second embodiment
Annotate: the reference wavelength of table 3 is d-line 587.6nm
The aspherical surface data of table 4 second embodiment
The photo-optic system of the utility model the 3rd embodiment sees also Fig. 3 A, and the aberration curve of the 3rd embodiment sees also Fig. 3 B, and the photo-optic system of the 3rd embodiment extremely comprises as side in regular turn from the thing side:
The 3rd lens 330 of the positive refracting power of one tool, its material is plastics, the thing side surface 331 of the 3rd lens 330 is a convex surface, is convex surface as side surface 332, in addition the thing side surface 331 of the 3rd lens 330 with all be made as aspheric surface as side surface 332;
The 4th lens 340 of the negative refracting power of one tool, its material is plastics, the thing side surface 341 of the 4th lens 340 is a convex surface, picture side surface 342 is a concave surface, in addition the thing side surface 341 of the 4th lens 340 with all be made as aspheric surface as side surface 342, and the thing side surface 341 of the 4th lens 340 with all be provided with the point of inflexion as side surface 342;
One aperture 300, it is located between second lens 320 and the 3rd lens 330;
One infrared ray filtering optical filter (IR-filter) 370, it is located between the 4th lens 340 picture side surfaces 342 and the imaging surface 390, and the material of infrared ray filtering optical filter 370 is glass and the focal length that does not influence this photo-optic system.
The equational expression of the aspheric curve of the 3rd embodiment is as the form of first embodiment.
Among the 3rd embodiment, the focal length of whole photo-optic system is f, and its pass is: f=3.09.
Among the 3rd embodiment, the f-number of whole photo-optic system (f-number) is Fno, and its pass is: Fno=2.10.
Among the 3rd embodiment, half of the maximum visual angle of whole photo-optic system is HFOV, and its pass is: HFOV=36.5.
Among the 3rd embodiment, the abbe number of the 3rd lens 330 is V3, and the abbe number of the 4th lens 340 is V4, and its pass is: V3-V4=32.5.
Among the 3rd embodiment, the mirror spacing between first lens 310 and second lens 320 is T12, and the whole focal length of photo-optic system is f, and its pass is: T12/f=0.16.
Among the 3rd embodiment, the center thickness of first lens 310 is CT1, and the whole focal length of photo-optic system is f, and its pass is: CT1/f=0.65.
Among the 3rd embodiment, the center thickness of first lens 310 is CT1, and the center thickness of second lens 320 is CT2, and its pass is: CT2/CT1=0.24.
Among the 3rd embodiment, thing side surface 311 radius-of-curvature of first lens 310 are R1, first lens 310 be R2 as side surface 312 radius-of-curvature, its pass is: R1/R2=2.63.
Among the 3rd embodiment, the focal length of second lens 320 is f2, and the focal length of the 3rd lens 330 is f3, and its pass is: f3/f2=0.36.
Among the 3rd embodiment, the focal length of first lens 310 is f1, and the focal length of the 4th lens 340 is f4, and its pass is: f4/f1=0.30.
Among the 3rd embodiment, the maximum magnitude part of passing through as side surface 332 glazed threads of the 3rd lens 330 and the vertical range of optical axis 350 are Y32, the 3rd lens 330 as being SAG32 for the position of Y32 with the distance that is tangential on the 3rd lens 330 apart from optical axis 350 on the side surface 332 as the tangent plane on optical axis 350 summits of side surface 332, its relational expression is: SAG32/Y32=0.48.It should be noted that the synoptic diagram of this SAG32 and Y32 is similar to first embodiment (being Fig. 1 C), so no longer draw at this.
Among the 3rd embodiment, aperture 300 to the distance of imaging surface 390 on optical axis 350 is SL, and the thing side surface 311 of first lens 310 is TTL to the distance of imaging surface 390 on optical axis 350, and its pass is: SL/TTL=0.63.
Among the 3rd embodiment, the thing side surface 311 of first lens 310 to the distance of imaging surface 390 on optical axis 350 is TTL, photo-optic system also is provided with a sense electronics optical assembly (not drawing on the figure) at imaging surface 390 places, long half of the effective picture element of sense electronics optical assembly zone diagonal line is ImgH, and its relational expression is: TTL/ImgH=3.39.
The detailed structured data of the 3rd embodiment is as shown in the table 5, and its aspherical surface data is as shown in the table 6, and wherein, the unit of radius-of-curvature, thickness and focal length is mm.
The structured data of table 5 the 3rd embodiment
Annotate: the reference wavelength of table 5 is d-line 587.6nm
The aspherical surface data of table 6 the 3rd embodiment
What deserves to be explained is; table 1 to table 6 is depicted as the different numerical value change tables of the utility model photo-optic system embodiment; the numerical value change of each embodiment of the utility model is all true tests gained, even use different numerical value, the product of same structure still belongs to protection category of the present utility model.Table 7 is the numerical data of the corresponding the utility model correlationship of each embodiment formula.
The numerical data of the corresponding the utility model correlationship of each embodiment of table 7 formula
| First embodiment | Second embodiment | The 3rd embodiment | |
| f | 3.02 | 3.11 | 3.09 |
| Fno | 2.05 | 2.40 | 2.10 |
| HFOV | 37.4 | 36.5 | 36.5 |
| V3-V4 | 32.5 | 32.5 | 32.5 |
| T12/f | 0.19 | 0.15 | 0.16 |
| CT1/f | 0.56 | 0.58 | 0.65 |
| CT2/CT1 | 0.29 | 0.34 | 0.24 |
| R1/R2 | 2.55 | 2.69 | 2.63 |
| f3/f2 | 0.43 | 0.57 | 0.36 |
| f4/f1 | 0.38 | 0.33 | 0.30 |
| SAG32/Y32 | 0.52 | 0.49 | 0.48 |
| SL/TTL | 0.64 | 0.71 | 0.63 |
| TTL/ImgH | 3.21 | 3.29 | 3.39 |
In sum, photo-optic system of the present utility model owing to adopt said lens structure, arrangement mode and configuration, can effectively dwindle the volume of camera lens, has bigger visual angle, reduces the susceptibility of system, more can obtain higher resolving power simultaneously.
Claims (21)
1. a photo-optic system is characterized in that, is extremely comprised in regular turn as side by the thing side:
First lens of the negative refracting power of one tool, its thing side surface is a convex surface, is concave surface as side surface;
Second lens of the positive refracting power of one tool;
The 3rd lens of the positive refracting power of one tool, its thing side surface be all aspheric surface as side surface;
The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, and the thing side surface of described the 4th lens be all aspheric surface as side surface;
The lens of tool refracting power are four in the described photo-optic system, and system also is provided with an aperture;
Mirror spacing between described first lens and second lens is T12, the whole focal length of photo-optic system is f, and the center thickness of first lens is CT1, and aperture to the distance of imaging surface on optical axis is SL, the thing side surface of first lens is TTL to the distance of imaging surface on optical axis, and its pass is:
0.1＜T12/f＜0.3；
0.30＜CT1/f＜0.75；
0.52＜SL/TTL＜0.82。
2. photo-optic system as claimed in claim 1 is characterized in that: described the 3rd lens be convex surface as side surface.
3. photo-optic system as claimed in claim 2 is characterized in that: described the 4th lens are provided with the point of inflexion.
4. photo-optic system as claimed in claim 3 is characterized in that: the material of described the 3rd lens and the 4th lens is all plastics.
5. photo-optic system as claimed in claim 4 is characterized in that: the focal length of described second lens is f2, and the focal length of the 3rd lens is f3, and both sides relation is 0.2＜f3/f2＜0.7.
6. photo-optic system as claimed in claim 5, it is characterized in that: have air clearance between described first lens and second lens, the center thickness of first lens is CT1, and the center thickness of second lens is CT2, and both sides relation is 0.2＜CT2/CT1＜0.50.
7. photo-optic system as claimed in claim 5 is characterized in that: the focal length of described first lens is f1, and the focal length of the 4th lens is f4, and both sides relation is 0.2＜f4/f1＜0.45.
8. photo-optic system as claimed in claim 7, it is characterized in that: the maximum magnitude part that described the 3rd lens pass through as the side surface glazed thread and the vertical range of optical axis are Y32, the 3rd lens are as being the position of Y32 and to be tangential on the 3rd lens be SAG32 as the distance between the tangent plane on side surface optical axis summit apart from optical axis on the side surface, and both sides relation is 0.4＜SAG32/Y32＜0.6.
9. photo-optic system as claimed in claim 5 is characterized in that: the abbe number of described the 3rd lens is V3, and the abbe number of the 4th lens is V4, and both sides relation is 30＜V3-V4＜42.
10. photo-optic system as claimed in claim 5 is characterized in that: the thing side surface radius-of-curvature of described first lens is R1, first lens be R2 as the side surface radius-of-curvature, both sides relation is 2.0＜R1/R2＜3.0.
11. photo-optic system as claimed in claim 2, it is characterized in that: described imaging surface place is provided with a sense electronics optical assembly, the thing side surface of described first lens to the distance of imaging surface on optical axis is TTL, long half of the effective picture element of described sense electronics optical assembly zone diagonal line is ImgH, and both sides relation is TTL/ImgH＜3.8.
12. a photo-optic system is characterized in that, is extremely comprised in regular turn as side by the thing side:
First lens of the negative refracting power of one tool, its thing side surface is a convex surface, is concave surface as side surface;
Second lens of the positive refracting power of one tool;
The 3rd lens of the positive refracting power of one tool;
The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, and described the 4th lens are provided with the point of inflexion;
The lens of tool refracting power are four in the described photo-optic system, and system also is provided with an aperture;
The focal length of described first lens is f1, and the focal length of the 4th lens is f4, and the center thickness of first lens is CT1, the center thickness of second lens is CT2, aperture is SL to the distance of imaging surface on optical axis, and the thing side surface of first lens is TTL to the distance of imaging surface on optical axis, and its pass is:
0.2＜f4/f1＜0.6；
0.2＜CT2/CT1＜0.5；
0.52＜SL/TTL＜0.82。
13. photo-optic system as claimed in claim 12 is characterized in that: the material of described the 3rd lens is plastics, its thing side surface be all aspheric surface as side surface.
14. photo-optic system as claimed in claim 13 is characterized in that: the mirror spacing between described first lens and second lens is T12, and the whole focal length of photo-optic system is f, and both sides relation is 0.1＜T12/f＜0.3.
15. photo-optic system as claimed in claim 14 is characterized in that: the abbe number of described the 3rd lens is V3, and the abbe number of the 4th lens is V4, and both sides relation is 30＜V3-V4＜42.
16. photo-optic system as claimed in claim 14, it is characterized in that: the maximum magnitude part that described the 3rd lens pass through as the side surface glazed thread and the vertical range of optical axis are Y32, the 3rd lens are as being the position of Y32 and to be tangential on the 3rd lens be SAG32 as the distance between the tangent plane on side surface optical axis summit apart from optical axis on the side surface, and both sides relation is 0.4＜SAG32/Y32＜0.6.
17. photo-optic system as claimed in claim 13 is characterized in that: the thing side surface of described the 3rd lens be all convex surface as side surface.
18. photo-optic system as claimed in claim 17 is characterized in that: the thing side surface radius-of-curvature of described first lens is R1, first lens be R2 as the side surface radius-of-curvature, both sides relation is 2.0＜R1/R2＜3.0.
19. photo-optic system as claimed in claim 17 is characterized in that: the focal length of described second lens is f2, and the focal length of the 3rd lens is f3, and both sides relation is 0.2＜f3/f2＜0.7.
20. a photo-optic system is characterized in that, is extremely comprised in regular turn as side by the thing side:
First lens of the negative refracting power of one tool, its thing side surface are convex surface, be concave surface as side surface;
Second lens of the positive refracting power of one tool;
The 3rd lens of the positive refracting power of one tool, its thing side surface be all convex surface as side surface, and the thing side surface be all aspheric surface as side surface, described the 3rd lens are plastic material;
The 4th lens of the negative refracting power of one tool, it is a concave surface as side surface, and the thing side surface be all aspheric surface as side surface, described the 4th lens are provided with the point of inflexion, material is plastics;
The lens of tool refracting power are four in the described photo-optic system, and system also is provided with an aperture;
Mirror spacing between described first lens and second lens is T12, the whole focal length of photo-optic system is f, the focal length of second lens is f2, the focal length of the 3rd lens is f3, aperture to the distance of imaging surface on optical axis is SL, the thing side surface of first lens is TTL to the distance of imaging surface on optical axis, and its pass is:
0.07＜T12/f＜0.50；
0.2＜f3/f2＜0.7；
0.52＜SL/TTL＜0.82。
21. photo-optic system as claimed in claim 20 is characterized in that: the focal length of described first lens is f1, and the focal length of the 4th lens is f4, and the abbe number of the 3rd lens is V3, and the abbe number of the 4th lens is V4, and its pass is:
0.2＜f4/f1＜0.6；
30＜V3-V4＜42。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206609307U CN201917707U (en) | 2010-12-15 | 2010-12-15 | Optical camera system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206609307U CN201917707U (en) | 2010-12-15 | 2010-12-15 | Optical camera system |
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| Publication Number | Publication Date |
|---|---|
| CN201917707U true CN201917707U (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206609307U Expired - Lifetime CN201917707U (en) | 2010-12-15 | 2010-12-15 | Optical camera system |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566013A (en) * | 2010-12-15 | 2012-07-11 | 大立光电股份有限公司 | Optical photographing system |
| US9857558B1 (en) | 2016-07-05 | 2018-01-02 | Genius Electronic Optical (Xiamen) Co., Ltd. | Optical imaging lens |
| WO2020238495A1 (en) * | 2019-05-24 | 2020-12-03 | 浙江舜宇光学有限公司 | Optical imaging lens |
-
2010
- 2010-12-15 CN CN2010206609307U patent/CN201917707U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566013A (en) * | 2010-12-15 | 2012-07-11 | 大立光电股份有限公司 | Optical photographing system |
| US9857558B1 (en) | 2016-07-05 | 2018-01-02 | Genius Electronic Optical (Xiamen) Co., Ltd. | Optical imaging lens |
| WO2020238495A1 (en) * | 2019-05-24 | 2020-12-03 | 浙江舜宇光学有限公司 | Optical imaging lens |
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