CN204028443U - A kind of wide-angle distortion dual-band confocal optical camera lens that disappears - Google Patents
A kind of wide-angle distortion dual-band confocal optical camera lens that disappears Download PDFInfo
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- CN204028443U CN204028443U CN201420352412.7U CN201420352412U CN204028443U CN 204028443 U CN204028443 U CN 204028443U CN 201420352412 U CN201420352412 U CN 201420352412U CN 204028443 U CN204028443 U CN 204028443U
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Abstract
The utility model provides a kind of wide-angle distortion dual-band confocal optical camera lens that disappears, comprise front group, diaphragm, rear group and optical filter, it is characterized in that, described front group is contrary Galileo optical system, is comprised successively: the first negative lens, the second negative lens, the 3rd negative lens, the first positive lens and the second positive lens by nearly object space; Described rear group has positive light coke, comprised successively by nearly object space: the 3rd positive lens, the 4th negative lens, the 4th positive lens, the 5th positive lens and the 6th positive lens, described the 3rd positive lens, the 4th negative lens and the 4th positive lens connect airtight to be become one and connects airtight group, and described lens are glass lens.The wide-angle lens that the utility model provides adopts 10 eyeglasses, and according to the Rational Arrangement between each element, simple in structure, production difficulty and cost are reduced, and meet field angle and reach 126 degree, the requirement that distortion is less than 5%, image quality is high, wave band is visible and near infrared, can be used for day and night type monitoring camera.
Description
Technical field
The utility model relates to a kind of camera lens, relates in particular to a kind of wide-angle for safety monitoring distortion dual-band confocal optical camera lens that disappears.
Background technology
Wide-angle lens can obtain the larger visual field with its huge field angle, is widely used in artistic photography, in the fields such as trailer-mounted radar and security monitoring.But the anamorphose-distortion that can cause due to huge field angle.In phtographic lens, due to the specific artistic effect of needs, so distortion allows, still, in the field such as trailer-mounted radar, security monitoring, huge distortion is fatal, may therefore cause the generation of tragedy.Therefore distortion is one of huge factor of restriction wide-angle lens manufacture and application.
In prior art to the wide-angle lens conventional method of distortion that disappears: the one, realize the wide-angle lens distortion that disappears by complicated Digital Image Processing, the image processing process complexity of this method, relates to digital hardware more, has increased widely cost; The 2nd, the mirror group structure of change wide-angle lens, for example, in order not introduce distortion in expanding field angle, the general aspherical lens that adopts, and at camera lens key position, distortion is proofreaied and correct, but under this mode, although existing aspheric surface wide-angle lens can be corrected distortion effectively, has complex structure, the defect such as eyeglass quantity is many.
Therefore, need a kind of wide-angle distortion dual-band confocal optical camera lens that disappears, can realize large field angle, within distortion is controlled in allowed band, image quality is high, and can be used for visible light wave band and near-infrared band.
Summary of the invention
For above-mentioned deficiency, the utility model provides a kind of wide-angle distortion dual-band confocal optical camera lens that disappears, and can realize large field angle, and its distortion and aberration can be effectively controlled, and its image quality is high and be not subject to influence of temperature change.
For addressing the above problem, the utility model provides a kind of wide-angle distortion dual-band confocal optical camera lens that disappears, comprise successively front group, diaphragm and rear group by nearly object space, described front group is contrary Galileo optical system, is comprised successively: the first negative lens, the second negative lens, the 3rd negative lens, the first positive lens and the second positive lens by nearly object space; Described rear group is the class goggle structure with positive light coke, comprised successively by nearly object space: the 3rd positive lens, the 4th negative lens, the 4th positive lens, the 5th positive lens and the 6th positive lens, between described the 3rd positive lens, the 4th negative lens and the 4th positive lens adjacent lens, connecting airtight between two becomes one and connects airtight group, and described each lens are glass lens.
Further, two minute surfaces of described the first negative lens are all aspheric minute surfaces, aspherical mirror is continually varying from lens center to periphery curvature, the spherical lens of certain curvature is different from having from lens center to periphery, non-spherical lens has better radius-of-curvature characteristic, have advantages of to improve and distort aberration and improve astigmatic image error, can make the visual field become truer more greatly, thereby improve image quality.
Further, described lens are glass lens, due to plastic lens easily distortion under larger External Force Acting, cause the destruction to camera lens quality; Be acted upon by temperature changes serious, thereby affect image quality; Mould Machining is costly, is unfavorable for small serial production, therefore adopts glass lens to can be good at avoiding the adverse effect of bringing due to above-mentioned shortcoming.
Further, described the 3rd positive lens, the 4th negative lens and the 4th positive lens adopt the form of gummed to form to connect airtight group, effectively correcting chromatic aberration, and gummed mode is not only simply but also can meet firmness requirement.
Further, described diaphragm is installed between the second positive lens and the 3rd positive lens, for the eyeglass of fixed optics camera lens.
Further, this wide-angle distortion dual-band confocal optical camera lens that disappears also comprises optical filter, described optical filter is between the 6th positive lens and imaging side, preferably, described optical filter is BK7 glass filter, its refractive index n=1.5168, dispersion v=64.17, and utilize IR cut film plating process to eliminate service band light in addition.
Further, the first negative lens has protruding the first minute surface to object space and upper and lower side is recessed the second minute surface to image space of plane and middle position, its refractive index n
1scope and dispersion v
1scope is respectively: 1.45 < n
1< 1.70,50 < v
1< 75.
Further, described the second negative lens has protruding the 3rd minute surface to object space and upper and lower side is recessed the 4th minute surface to image space of plane and middle position, its refractive index n
2scope and dispersion v
2scope is respectively: 1.45 < n
2< 1.75,50 < v
2< 65;
Further, described the 3rd negative lens has recessed the 5th minute surface to object space and recessed to image space the 6th minute surface, its refractive index n
3scope and dispersion v
3scope is respectively: 1.55 < n
3< 1.70,30 < v
3< 50;
The first negative lens, the second negative lens and the 3rd negative lens are to adopt the negative lens with larger focal power, and the outer visual field of bending axis chief ray, diminishes its angle with respect to optical axis, and then reduce the size of rear set of pieces effectively.
Further, described the first positive lens has protruding the 7th minute surface to object space and protruding the 8th minute surface to image space, its refractive index n
4scope and dispersion v
4scope is respectively: 1.70 < n
4< 1.85,20 < v
4< 30;
Further, described the second positive lens has protruding the 9th minute surface to object space and protruding the tenth minute surface to image space, its refractive index n
5scope and dispersion v
5scope is respectively: 1.55 < n
5< 1.70,30 < v
5< 40;
The first positive lens and the second positive lens can make the front group of divergent rays producing again become parallel rays through converging, and whole front group has formed a contrary Galileo system, the small-bore directional light of large field angle be transformed to and neglect the bigbore directional light in rink corner.
Further, described the 3rd positive lens has protruding the 11 minute surface to object space and protruding the 12 minute surface to image space, its refractive index n
7scope and dispersion v
7scope is respectively: 1.5 < n
7< 1.65,55 < v
7< 70;
Further, described the 4th negative lens has recessed the 13 minute surface to object space and recessed the 14 minute surface to image space, its refractive index n
8scope and dispersion v
8scope is respectively: 1.5 < n
8< 1.65,55 < v
8< 70;
Further, described the 4th positive lens has protruding the 15 minute surface to object space and protruding the 16 minute surface to image space, its refractive index n
9scope and dispersion v
9scope is respectively: 1.5 < n
9< 1.65,55 < v
9< 70;
Further, described the 5th positive lens has protruding the 17 minute surface to object space and protruding the 18 minute surface to image space, its refractive index n
10scope and dispersion v
10scope is respectively 1.5 < n
10< 1.65,55 < v
10< 70;
Further, described the 6th positive lens has protruding the 19 minute surface to object space and protruding the 20 minute surface to image space, its refractive index n
11scope and dispersion v
11scope is respectively 1.5 < n
11< 1.65,40 < v
11< 60;
The effect of the 5th positive lens and the 6th positive lens be make the outer chief ray of axle further to optical axis direction bending to reduce image planes angle of incidence of light, ensure illuminance uniformity.
Described each index of refraction in lens represents with n, and dispersion represents with v.
Further, the distance between the minute surface center of described each eyeglass is following relation:
Distance range between described the second minute surface and the 3rd minute surface is between 2.6mm～2.7mm;
Distance between described the 4th minute surface and the 5th minute surface is 3.4mm～3.5mm;
Distance between described the 6th minute surface and the 7th minute surface is 1.3mm～1.4mm;
Distance between described the 8th minute surface and the 9th minute surface is at 0.9mm～1.0mm;
Between described the tenth minute surface and diaphragm, distance is at 0.1mm～0.2mm;
Distance between described diaphragm and the 12 minute surface is 1.2mm～1.3mm;
Distance between described the 16 minute surface and the 17 minute surface is 0.1mm～0.2mm;
Distance between described the 18 minute surface and the 19 minute surface is 0.1mm～0.2mm;
Distance between described the 20 minute surface and optical filter is 3.2～3.3mm.
A kind of wide-angle of the utility model distortion dual-band confocal optical camera lens that disappears, before it, group the first negative lens, the second negative lens and the 3rd negative lens are all to adopt the negative lens with larger focal power, the outer visual field of bending axis chief ray effectively, its angle with respect to optical axis is diminished, and then reduce the size of rear set of pieces.The first positive lens and the second positive lens are drum type lens, its focal power is for just, can make the front group of divergent rays producing again become parallel rays through converging, whole front group has formed a contrary Galileo system, the small-bore directional light of large field angle has been transformed to and neglects the bigbore directional light in rink corner.What after camera lens, group adopted is class goggle structure, the 3rd positive lens, the 4th negative lens and the 4th positive lens combine closely form one connect airtight group, effectively correcting chromatic aberration, the effect of the 5th positive lens and the 6th positive lens be make the outer chief ray of axle further to optical axis direction bending to reduce image planes angle of incidence of light, ensure illuminance uniformity.The wide-angle lens that the utility model provides adopts 10 eyeglasses, by the lens shape of particular design, and according to the Rational Arrangement between each eyeglass, simple in structure, reduced production difficulty, optical full length is less than 25mm, and camera lens overall length is less than 33mm, more than camera lens pixel can reach 800W, image quality is high; The transport function (MTF) of camera lens to locating to reach more than 0.4, realized the large field angle of 126 degree, and distortion is controlled in 5% at 120 lines; Visible light wave range (480-660 micron) and infrared band (830-850 micron) confocal imaging are realized, wave band is visible ray and near infrared light, can be used for day and night type monitoring camera, in addition, because the die sinking cost of glass mirror is relatively low, be therefore applicable to the production of short run camera lens.
The application's further feature and advantage will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the application.The application's object and other advantages can be realized and be obtained by specifically noted structure in write instructions, claims and accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model specific embodiment;
Fig. 2 is the visible light wave range MTF curve map of the utility model specific embodiment;
Fig. 3 is the infrared band MTF curve map of the utility model specific embodiment;
Fig. 4 a is the visible light wave range optics place distortion figure of the utility model specific embodiment;
Fig. 4 b is the infrared band optics place distortion figure of the utility model specific embodiment;
Fig. 5 is the visible light wave range point range figure of the utility model specific embodiment;
Fig. 6 is the infrared band point range figure of the utility model specific embodiment;
Fig. 7 is the visible light wave range wave aberration figure of the utility model specific embodiment;
Fig. 8 is the infrared band wave aberration figure of the utility model specific embodiment.
Reference numeral S1, the first minute surface, S2, the second minute surface, S3, the 3rd minute surface, S4, the 4th minute surface, S5, the 5th minute surface, S6, the 6th minute surface, S7, the 7th minute surface, S8, the 8th minute surface, S9, the 9th minute surface, S10, the tenth minute surface, S11, the 11 minute surface, S12, the 12 minute surface, S13, the 13 minute surface, S14, the 14 minute surface, S15, the 15 minute surface, S16, the 16 minute surface, S17, the 17 minute surface, S18, the 18 minute surface, S19, the 19 minute surface, S20, the 20 minute surface, E1, the first negative lens, E2, the second negative lens, E3, the 3rd negative lens, E4, the first positive lens, E5, the second positive lens, E6, the 3rd positive lens, E7, the 4th negative lens, E8, the 4th positive lens, E9, the 5th positive lens, E10, the 6th positive lens, E11, optical filter, A, diaphragm.
Embodiment
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
As shown in Figure 1, the present embodiment provides a kind of wide-angle distortion dual-band confocal optical camera lens that disappears, comprise successively front group, diaphragm A, rear group and optical filter E11, it is characterized in that, described front group is contrary Galileo form, is comprised successively: the first negative lens E1, the second negative lens E2, the 3rd negative lens E3, the first positive lens E4 and the second positive lens E5 by nearly object space; Described rear group has positive light coke, comprised successively by nearly object space: the 3rd positive lens E6, the 4th negative lens E7, the 4th positive lens E8, the 5th positive lens E9 and the 6th positive lens E10, described the 3rd positive lens E6, the 4th negative lens E7 and the 4th positive lens E8 connect airtight to be become one and connect airtight group.
Between described each eyeglass minute surface center, distance meets following relation:
Distance between described the second minute surface S2 and the 3rd minute surface S3 is 2.15mm,
Distance between described the 4th minute surface S4 and the 5th minute surface S5 is 3.55mm,
Distance between described the 6th minute surface S6 and the 7th minute surface S7 is 1.45mm,
Distance between described the 8th minute surface S8 and the 9th minute surface S9 is 0.0125mm,
Distance between described the tenth minute surface S10 and diaphragm A is 0.125mm,
Distance between described diaphragm A and the 12 minute surface S12 is 1.15mm,
Distance between described the 16 minute surface S16 and the 17 minute surface S17 is 0.125mm,
Distance between described the 18 minute surface S18 and the 19 minute surface S19 is 0.125mm,
Distance between described the 20 minute surface S20 and optical filter E11 is 3.25mm.
Described lens are glass lens, and glass lens die sinking is cheap, are applicable to small serial production;
Two minute surfaces of described the first negative lens E1 are all aspheric surfaces, aspheric mirror is continually varying from lens center to periphery curvature, the spherical lens of certain curvature is different from having from lens center to periphery, non-spherical lens has better radius-of-curvature characteristic, have advantages of to improve and distort aberration and improve astigmatic image error, can make the visual field become truer more greatly, thereby improve image quality.
Described diaphragm A is fixed aperture, is installed between the second positive lens E5 and the 3rd positive lens E6, for the eyeglass of fixed optics camera lens.
The described wide-angle distortion dual-band confocal optical camera lens that disappears also comprises optical filter E11, and described optical filter E11 is between the 6th positive lens E10 and imaging side; Described optical filter E1112 is the glass material of BK7 model, refractive index n=1.5168, and dispersion v=64.17, and utilize IR cut film plating process to eliminate service band light in addition.
Described the first negative lens E1 has protruding the first minute surface S1 to object space and upper and lower side is recessed the second minute surface S2 to image space of plane and middle position, adopts the glass material of D-LAK6 model, its refractive index n
1=1.693847, dispersion v
1=53.15; Described the second negative lens E22 has protruding the 3rd minute surface S3 to object space and upper and lower side is recessed the 4th minute surface S4 to image space of plane and middle position, adopts the glass material of H-K9L model, its refractive index n
2=1.516798, dispersion v
2=54.19; Described the 3rd negative lens E33 has recessed the 5th minute surface S5 to object space and recessed to image space the 6th minute surface S6, adopts the glass material of ZBAF16 model, its refractive index n
3=1.666721, dispersion v
3=48.42; Described the first negative lens E1, the second negative lens E2 and the 3rd negative lens E3 adopt the negative lens with larger focal power, and the outer visual field of bending axis chief ray, diminishes its angle with respect to optical axis, and then reduce the size of rear set of pieces effectively.Described the first positive lens E4 has protruding the 7th minute surface S7 to object space and protruding the 8th minute surface S8 to image space, adopts the glass material of H-ZF6 model, its refractive index n
4=1.755200, dispersion v
4=27.53; Described the second positive lens E5 has protruding the 9th minute surface S9 to object space and protruding the tenth minute surface S10 to image space, adopts the glass material of H-ZK6 model, its refractive index n
5=1.625361, dispersion v
5=35.52; Described the first positive lens E4 and the second positive lens E5 are drum type lens, its focal power is for just, can make the front group of divergent rays producing again become parallel rays through converging, whole front group has formed a contrary Galileo system, the small-bore directional light of large field angle has been transformed to and neglects the bigbore directional light in rink corner.Described the 3rd positive lens E6 has protruding the 11 minute surface S11 to object space and protruding the 12 minute surface S12 to image space, and mirror adopts the glass material of BAF3 model, its refractive index n
7=1.582670, dispersion v
7=46.47; Described the 4th negative lens E7 has recessed the 13 minute surface S13 to object space and recessed the 14 minute surface S14 to image space, and mirror adopts the glass material of ZF6 model, its refractive index n
8=1.755199, dispersion v
8=27.53; Described the 4th positive lens E8 has protruding the 15 minute surface S15 to object space and protruding the 16 minute surface S16 to image space, adopts the glass material of H-K9L model, its refractive index n
9=1.516798, dispersion v
9=64.19; The 12 of described the 3rd positive lens E6 with the 13 of the 4th negative lens E7, connect airtight with the 15 face of the 4th positive lens E8 at the tenth four sides of the 4th negative lens E7, forms one and connect airtight group, effectively correcting chromatic aberration.
Described the 5th positive lens E9 has protruding the 17 minute surface S17 to object space and protruding the 18 minute surface S18 to image space, adopts the glass material of H-K9L model, its refractive index n
10=1.516798, dispersion v
10=64.19; Described the 6th positive lens E10 has protruding the 19 minute surface S19 to object space and protruding the 20 minute surface S20 to image space, adopts the glass material of BAF6 model, its refractive index and n
11=1.588999, dispersion v
11=48.65; The effect of described the 5th positive lens E9 and the 6th positive lens E10 be make the outer chief ray of axle further to optical axis direction bending to reduce image planes angle of incidence of light, ensure illuminance uniformity.
Please refer to the visible light wave range MTF curve map of Fig. 2 the utility model specific embodiment, in figure, different curves represent respectively each field rays, the actual situation of curve represents respectively the picture element of sagitta of arc direction and meridian direction, from the visible light wave range MTF curve map of specific embodiment, for the light of visible light wave range different wave length, the in the situation that of different field of view angle, the MTF curve of the present embodiment visible light wave range is comparatively level and smooth compact in sagitta of arc direction and meridian direction, camera lens still can reach more than 0.4 at the mtf value at 120 lines per millimeter places, the mtf value characterizing is relatively high, show to have obtained good correction at the aberration of visible light wave range camera lens.
Please refer to the infrared band MTF curve map of Fig. 3 the utility model specific embodiment, in figure, different curves represent respectively each field rays, the actual situation of curve represents respectively the picture element of sagitta of arc direction and meridian direction, from the infrared band MTF curve map of specific embodiment, for the light of infrared band different wave length, the in the situation that of different field of view angle, the MTF curve of the present embodiment infrared band is comparatively level and smooth compact in sagitta of arc direction and meridian direction, camera lens still can reach more than 0.4 at the mtf value at 120 lines per millimeter places, the mtf value characterizing is relatively high, show to have obtained good correction at the aberration of infrared band camera lens.
Due to the result difference that optical lens imaging and paraxial optics in real work (Paraxial Optics, Gaussian optics) obtain, have certain departing from, the relative paraxial imagery of optical imagery depart from title aberration.In the optics place distorted image dygoram of the utility model specific embodiment shown in Fig. 4 a, solid line is meridianal curvature of field, dotted line is Sagittal field curvature, the two makes difference is exactly the astigmatism of camera lens, astigmatism is the important aberration index that affects the outer field rays of camera lens axle, astigmatism is crossed the serious image quality that has influence on camera lens off-axis ray of conference, from figure, the curvature of field of camera lens and astigmatism are all corrected in 50 microns, the curvature of field and the astigmatism that characterize camera lens are all controlled in a good scope, and the image quality of camera lens off-axis ray is higher.Curve shown in Fig. 4 b is the distortion curve of camera lens, distortion can not have influence on the sharpness of camera lens, but can cause the anamorphose of camera lens, for bugeye lens, correcting distorted is difficulty very, and under not correcting distorted state, camera lens can produce 30% to 50% distortion conventionally.And the distortion of this camera lens is 126 to be still less than 5% while spending in field angle, the disappear distortion of distortion dual-band confocal optical camera lens of this explanation the utility model wide-angle has been remedied to a very good degree.
Figure 5 shows that the visible light wave range point range figure of the utility model specific embodiment, what show due to point range figure is that each field rays of camera lens converges the picture forming at image planes place, each picture is exactly a disc of confusion, two discs of confusion are distinguished near rear being just not easy, therefore just limited the resolution of camera lens, therefore disc of confusion is larger, the resolution that camera lens is described is lower, so it has characterized camera lens and has obtained the characteristic of various aberrations, the disc of confusion RMS radius of point range figure is less, proves that the image quality of camera lens is better.The disc of confusion RMS diameter of this camera lens is all less than 6 microns, illustrates at visible light wave range, and camera lens aberration correction is good.
Figure 6 shows that the infrared band point range figure of the utility model specific embodiment, what show due to point range figure is that each field rays of camera lens converges the picture forming at image planes place, each picture is exactly a disc of confusion, two discs of confusion near rear with regard to bad differentiation, so just limit the resolution of camera lens, therefore disc of confusion is larger, and resolution is lower.The RMS radius of point range figure is less, proves that the image quality of camera lens is better.The disc of confusion RMS diameter of camera lens is equally all less than 6 microns, illustrates at infrared band, and camera lens aberration correction is good.
Shown in Fig. 7, this is the wave aberration figure of the visible light wave range of invention specific embodiment, based on wave optics theory, the spherical wave sending at an object point in paraxial region remains a spherical wave (Huygens' principle) after optical system, due to the existence of diffraction phenomena, the ideal of an object point similarly is a complicated Aili spot.For actual optical system, due to the existence of aberration, the corrugated forming through optical system has not been sphere, and the deviation on this actual corrugated and desirable corrugated becomes wave aberration, is called for short ripple poor.As seen from the figure, optical path difference between the actual corrugated of wave aberration and the desirable corrugated of the utility model specific embodiment visible light wave range is less, reach 126 while spending in field angle, wave aberration still can be controlled in 4.2 wavelength, and the present embodiment visible light wave range image quality is higher.
Figure 8 shows that the wave aberration figure of the infrared band of the utility model specific embodiment, what wave aberration figure reacted is departing from of actual corrugated and desirable corrugated, as seen from the figure, optical path difference between the actual corrugated of wave aberration and the desirable corrugated of the utility model specific embodiment infrared band is less, reach 126 while spending in field angle, wave aberration still can be controlled in 0.62 wavelength, and the present embodiment infrared band image quality is higher.
The wide-angle of this specific embodiment distortion dual-band confocal optical camera lens that disappears, before it, the first negative lens E1, the second negative lens E2 of group and the 3rd negative lens E3 adopt the negative lens with larger focal power, the outer visual field of bending axis chief ray effectively, its angle with respect to optical axis is diminished, and then reduce the size of rear set of pieces.The first positive lens E4 and the second positive lens E5 are drum type lens, its focal power is for just, can make the front group of divergent rays producing again become parallel rays through converging, whole front group has formed a contrary Galileo system, the small-bore directional light of large field angle has been transformed to and neglects the bigbore directional light in rink corner.What after camera lens, group adopted is class goggle structure, the 3rd positive lens E6, the 4th negative lens E7 and the 4th positive lens E8 form one and connect airtight group, effectively correcting chromatic aberration, the effect of the 5th positive lens E9 and the 6th positive lens E10 be make the outer chief ray of axle further to optical axis direction bending to reduce image planes angle of incidence of light, ensure illuminance uniformity.
The wide-angle lens that the utility model provides adopts 10 eyeglasses, by the lens shape of particular design, and according to the Rational Arrangement between each eyeglass, simple in structure, reduced production difficulty, optical full length is less than 25mm, and camera lens overall length is less than 33mm, more than camera lens pixel can reach 800W, image quality is high; The transport function (MTF) of camera lens to locating to reach more than 0.4, realized the large field angle of 126 degree, and distortion is controlled in 5% at 120 lines; Visible light wave range (480-660 micron) and infrared band (830-850 micron) confocal imaging are realized, wave band is visible ray and near infrared light, can be used for day and night type monitoring camera, in addition, because the die sinking cost of glass mirror is relatively low, be therefore applicable to the production of short run camera lens.The lens focus of the wide-angle lens of the present embodiment is 1.56mm, adopts ccd imageing sensor, its Diagonal Dimension 6mm, and cutoff frequency is 120lp/mm.
The above, be only preferred embodiment of the present utility model, is not to restriction of the present utility model, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as equivalent variations.
Claims (10)
1. the wide-angle distortion dual-band confocal optical camera lens that disappears, comprises and it is characterized in that front group, diaphragm and rear group, described front group by comprising successively near object space: the first negative lens, the second negative lens, the 3rd negative lens, the first positive lens and the second positive lens; Described rear group has positive light coke, by comprising successively near object space: the 3rd positive lens, the 4th negative lens, the 4th positive lens, the 5th positive lens and the 6th positive lens, connect airtight each other one of formation and connect airtight group between described the 3rd positive lens, the 4th negative lens and the 4th positive lens adjacent lens.
2. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that: described lens are glass lens.
3. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that:
Described the first negative lens has protruding the first minute surface to object space and recessed the second minute surface to image space;
Described the second negative lens has protruding the 3rd minute surface to object space and recessed the 4th minute surface to image space;
Described the 3rd negative lens has recessed the 5th minute surface to object space and recessed to image space the 6th minute surface;
Described the first positive lens has protruding the 7th minute surface to object space and protruding the 8th minute surface to image space;
Described the second positive lens has protruding the 9th minute surface to object space and protruding the tenth minute surface to image space;
Described the 3rd positive lens has protruding the 11 minute surface to object space and protruding the 12 minute surface to image space, and wherein the 12 is cemented surface;
Described the 4th negative lens has recessed the 13 minute surface to object space and recessed the 14 minute surface to image space, and wherein this two sides is cemented surface;
Described the 4th positive lens has protruding the 15 minute surface to object space and protruding the 16 minute surface to image space, and wherein the 15 is cemented surface;
Described the 5th positive lens has protruding the 17 minute surface to object space and protruding the 18 minute surface to image space;
Described the 6th positive lens has protruding the 19 minute surface to object space and protruding the 20 minute surface to image space.
4. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that, between the minute surface center of described each eyeglass, distance meets following relation:
Distance between described the second minute surface and the 3rd minute surface is 2.6mm～2.7mm;
Distance between described the 4th minute surface and the 5th minute surface is 3.4mm～3.5mm;
Distance between described the 6th minute surface and the 7th minute surface is 1.3mm～1.4mm;
Distance between described the 8th minute surface and the 9th minute surface is at 0.9mm～1.0mm;
Between described the tenth minute surface and diaphragm, distance is at 0.1mm～0.2mm;
Distance between described diaphragm and the 12 minute surface is 1.2mm～1.3mm
Distance between described the 16 minute surface and the 17 minute surface is 0.1mm～0.2mm;
Distance between described the 18 minute surface and the 19 minute surface is 0.1mm～0.2mm;
Distance between described the 20 minute surface and optical filter is 3.2～3.3mm.
5. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that: between described the 3rd positive lens, the 4th negative lens and the 4th positive lens adjacent lens, adopt the form of gummed to form and connects airtight group.
6. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that: also include the optical filter between the 6th positive lens and imaging side.
7. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that: described diaphragm is fixed aperture, is installed between the second positive lens and the 3rd positive lens.
8. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that, the refractive index of each lens meets respectively following condition:
The first negative lens refractive index n
1for: 1.45 < n
1< 1.70;
The second negative lens refractive index n
2for: 1.45 < n
2< 1.75;
The 3rd negative lens refractive index n
3for: 1.55 < n
3< 1.70;
The first positive lens refractive index n
4for: 1.70 < n
4< 1.85;
The second positive lens refractive index n
5for: 1.55 < n
5< 1.70;
The 3rd positive lens refractive index n
7for: 1.5 < n
7< 1.65;
The 4th negative lens refractive index n
8for: 1.5 < n
8< 1.65;
The 4th positive lens refractive index n
9for: 1.5 < n
9< 1.65;
The 5th positive lens refractive index n
10for: 1.5 < n
10< 1.65;
The 6th positive lens refractive index n
11for: 1.5 < n
11< 1.65;
Meet respectively following condition with the dispersion of each lens:
The first negative lens dispersion v
1for: 50 < v
1< 75;
The second negative lens dispersion v
2for: 50 < v
2< 65;
The 3rd negative lens dispersion v
3for: 30 < v
3< 50;
The first positive lens dispersion v
4for: 20 < v
4< 30;
The second positive lens dispersion v
5for: 30 < v
5< 40;
The 3rd positive lens dispersion v
7for: 55 < v
7< 70;
The 4th negative lens dispersion v
8for: 55 < v
8< 70;
The 4th positive lens dispersion v
9for: 55 < v
9< 70;
The 5th positive lens dispersion v
10for: 55 < v
10< 70;
The 6th positive lens dispersion v
11for: 40 < v
11< 60.
9. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that: two minute surfaces of described the first negative lens are all aspheric surfaces.
10. the wide-angle according to claim 1 distortion dual-band confocal optical camera lens that disappears, is characterized in that, described front group be against Galileo system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352412.7U CN204028443U (en) | 2014-06-28 | 2014-06-28 | A kind of wide-angle distortion dual-band confocal optical camera lens that disappears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352412.7U CN204028443U (en) | 2014-06-28 | 2014-06-28 | A kind of wide-angle distortion dual-band confocal optical camera lens that disappears |
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| Publication Number | Publication Date |
|---|---|
| CN204028443U true CN204028443U (en) | 2014-12-17 |
Family
ID=52068284
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420352412.7U Expired - Lifetime CN204028443U (en) | 2014-06-28 | 2014-06-28 | A kind of wide-angle distortion dual-band confocal optical camera lens that disappears |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076490A (en) * | 2014-06-28 | 2014-10-01 | 青岛歌尔声学科技有限公司 | Wide-angle distortion-removing dual-band confocal optical lens |
| CN105093487A (en) * | 2015-07-29 | 2015-11-25 | 深圳乐行天下科技有限公司 | Near infrared optical lens |
| CN107329237A (en) * | 2017-08-18 | 2017-11-07 | 广东北创光电科技股份有限公司 | Focal length is 50mm optical lens |
| CN110361834A (en) * | 2019-06-28 | 2019-10-22 | 福建福光股份有限公司 | A kind of low distortion, the wide-angle lens of high relative illumination and its working method |
-
2014
- 2014-06-28 CN CN201420352412.7U patent/CN204028443U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076490A (en) * | 2014-06-28 | 2014-10-01 | 青岛歌尔声学科技有限公司 | Wide-angle distortion-removing dual-band confocal optical lens |
| CN104076490B (en) * | 2014-06-28 | 2017-04-26 | 青岛歌尔声学科技有限公司 | Wide-angle distortion-removing dual-band confocal optical lens |
| CN105093487A (en) * | 2015-07-29 | 2015-11-25 | 深圳乐行天下科技有限公司 | Near infrared optical lens |
| CN105093487B (en) * | 2015-07-29 | 2020-09-04 | 深圳乐行天下科技有限公司 | Near-infrared optical lens |
| CN107329237A (en) * | 2017-08-18 | 2017-11-07 | 广东北创光电科技股份有限公司 | Focal length is 50mm optical lens |
| CN110361834A (en) * | 2019-06-28 | 2019-10-22 | 福建福光股份有限公司 | A kind of low distortion, the wide-angle lens of high relative illumination and its working method |
| CN110361834B (en) * | 2019-06-28 | 2021-08-10 | 福建福光股份有限公司 | Wide-angle lens with low distortion and high relative illumination and working method thereof |
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Effective date of registration: 20201013 Address after: 261031 north of Yuqing street, east of Dongming Road, high tech Zone, Weifang City, Shandong Province (Room 502, Geer electronic office building) Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: International Exhibition Center of wealth 18 No. 266061 Shandong province Qingdao city Laoshan District Qinling Mountains Road No. 3 Building 5 layer Patentee before: Qingdao GoerTek Technology Co.,Ltd. |