CN209070211U - A kind of 2 times of high definition zoom glass modeling camera lenses of compact type - Google Patents
A kind of 2 times of high definition zoom glass modeling camera lenses of compact type Download PDFInfo
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- CN209070211U CN209070211U CN201821935260.8U CN201821935260U CN209070211U CN 209070211 U CN209070211 U CN 209070211U CN 201821935260 U CN201821935260 U CN 201821935260U CN 209070211 U CN209070211 U CN 209070211U
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Abstract
The utility model relates to a kind of 2 times of high definition zoom glass of compact type to mould camera lens, the optical system of the camera lens includes preceding group of eyeglass A being negative along the focal power that input path the is set gradually from front to back and rear group of eyeglass B that focal power is positive, and organizing eyeglass A before described includes the meniscus lens A-1, biconcave lens A-2 and meniscus lens A-3 set gradually from front to back；Group eyeglass B includes the biconvex lens B-1 set gradually from front to back, the first non-spherical lens B-2, the second non-spherical lens B-3, meniscus lens B-4 and meniscus lens B-5 after described.The utility model is simple and reasonable for structure, it can be achieved that high-resolution, zero temp shift is day and night confocal, and compact-sized, multiple spot zoom can be adapted to 6,000,000 and following CCD or CMOS.
Description
Technical field:
The utility model relates to a kind of 2 times of high definition zoom glass of compact type to mould camera lens.
Background technique:
It is existing to there are various 2 times of zoom lens to be applied in security system on the market.But due to using glass mostly
Glass spherical design, camera lens are difficult to meet the market demand in pixel, performance and cost, meanwhile, structure is complicated, is difficult to realize zoom
Camera lens can also be small-sized expectation.In order to improve performance and pixel, therefore reach more high definition using more glass lens now
Image quality, also therefore considerably increase product cost, cause product promotion difficulty promoted.Currently, rarely having true in security industry
Inexpensive, high image quality, Low Drift Temperature, compact-sized high definition multiple spot zoom lens in positive meaning.
Utility model content:
The purpose of this utility model is that providing a kind of 2 times of high definition zoom glass of compact type in place of against the above deficiency
Camera lens is moulded, is not only simple in structure, rationally, and is efficiently convenient.
To achieve the goals above, the technical solution adopted in the utility model is: a kind of 2 times of high definition zooms of compact type
Glass moulds camera lens, and the optical system of the camera lens includes preceding group of mirror being negative along the focal power that input path is set gradually from front to back
The rear group of eyeglass B that piece A and focal power are positive, it is described before group eyeglass A include the meniscus lens A-1 set gradually from front to back, it is double
Concavees lens A-2 and meniscus lens A-3；Group eyeglass B includes the biconvex lens B-1 set gradually from front to back, first after described
Non-spherical lens B-2, the second non-spherical lens B-3, meniscus lens B-4 and meniscus lens B-5.
Further, the airspace of the meniscus lens A-1 and biconcave lens A-2 is 4.05mm, the biconcave lens
The airspace of A-2 and meniscus lens A-3 is 0.1mm, and the airspace of the meniscus lens A-3 and biconvex lens B-1 is
The airspace of 8.76mm, the biconvex lens B-1 and the first non-spherical lens B-2 are 0.55mm, and described first is aspherical
The airspace of mirror B-2 and the second non-spherical lens B-3 are 0.1mm, the second non-spherical lens B-3 and meniscus lens B-4
Airspace be the airspace of 0.45mm, the meniscus lens B-4 and meniscus lens B-5 be 0.1mm.
Further, the focal length of the optical system of the camera lens is f, meniscus lens A-1, biconcave lens A-2, meniscus lens
A-3, biconvex lens B-1, the first non-spherical lens B-2, the second non-spherical lens B-3, meniscus lens B-4 and meniscus lens B-
5 corresponding focal lengths are respectively f1, f2, f3, f4, f5, f6, f7, f8；Wherein f1, f2, f3, f4, f5, f6, f7, f8 and f meet with
Lower ratio: -3 <<-2；-4<<-3；4<<5；4<<5；2<<3；-3<<-2；5<<6；5<<6。
Further, the f5 and f6 completely must satisfy: -1.2 <<-0.6。
Further, the first non-spherical lens B-2 and the second non-spherical lens B-3 is plastic material manufacture.
Further, an optical filter is additionally provided on rear side of the meniscus lens B-5.
Compared with prior art, the utility model, which has the effect that, organizes two panels in eyeglass after (1) the utility model passes through
Aspherical correction spherical aberration and color difference are separated, the aspherical air-gap of two panels compensates senior aberration, and reasonable computation each aspherical
Make under high temperature and low temperature environment focus without offset, and achievees the effect that day and night parfocalization.(2) the utility model utilizes aspherical skill
Art, improves precision and simplifies structure, realizes that high-definition camera is horizontal with ultralow cost, not only can reach high-quality pixel on daytime
While, in the case where insufficient light or night, it may have high definition image quality, remaining unchanged in the adverse circumstances of different temperatures can be at complete
Kind picture；(3) the utility model is simple and reasonable for structure, solves existing 2 times of zoom lens clarity deficiency, using more eyeglasses
The problem of structure leads to increased costs, while structure is complicated, cannot achieve small-sized zoom lens.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of the optical system of short focus in the utility model embodiment；
Fig. 2 is the structural schematic diagram of the optical system of focal length in the utility model embodiment；
Fig. 3 is that short focus focuses the MTF so that under visible light central vision image quality optimal cases in the utility model embodiment
Figure；
Fig. 4 is that short focus focuses so that corresponding under visible light central vision image quality optimal cases in the utility model embodiment
Night vision MTF figure；
Fig. 5 is that focal length focuses the MTF so that under visible light central vision image quality optimal cases in the utility model embodiment
Figure；
Fig. 6 is that focal length focuses so that corresponding under visible light central vision image quality optimal cases in the utility model embodiment
Night vision MTF figure.
In figure:
Eyeglass A is organized before A-；A-1: meniscus lens A-1；A-2: biconcave lens A-2；A-3: meniscus lens A-3；Mirror is organized after B-
Piece B；B-1: biconvex lens B-1；B-2: the first non-spherical lens B-2；B-3: the second non-spherical lens B-3；B-4: meniscus lens
B-4；B-5: meniscus lens B-5；C- optical filter.
Specific embodiment:
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
As shown in figs. 1 to 6, a kind of 2 times of high definition zoom glass of compact type of the utility model mould camera lens, the light of the camera lens
System includes preceding group of eyeglass A being negative along the focal power that input path is set gradually from front to back and focal power is positive rear group
Eyeglass B, organizing eyeglass A before described includes the meniscus lens A-1, biconcave lens A-2 and meniscus lens set gradually from front to back
A-3；Group eyeglass B includes the biconvex lens B-1 set gradually from front to back, the first non-spherical lens B-2, the second aspheric after described
An optical filter is additionally provided on rear side of face lens B-3, meniscus lens B-4 and meniscus lens B-5, the meniscus lens B-5.
In the present embodiment, the airspace of the meniscus lens A-1 and biconcave lens A-2 are 4.05mm, and the concave-concave is saturating
The airspace of mirror A-2 and meniscus lens A-3 is 0.1mm, and the airspace of the meniscus lens A-3 and biconvex lens B-1 is
The airspace of 8.76mm, the biconvex lens B-1 and the first non-spherical lens B-2 are 0.55mm, and described first is aspherical
The airspace of mirror B-2 and the second non-spherical lens B-3 are 0.1mm, the second non-spherical lens B-3 and meniscus lens B-4
Airspace be the airspace of 0.45mm, the meniscus lens B-4 and meniscus lens B-5 be 0.1mm.
In the present embodiment, the focal length of the optical system of the camera lens is f, and meniscus lens A-1, biconcave lens A-2, bent moon are saturating
Mirror A-3, biconvex lens B-1, the first non-spherical lens B-2, the second non-spherical lens B-3, meniscus lens B-4 and meniscus lens
The corresponding focal length of B-5 is respectively f1, f2, f3, f4, f5, f6, f7, f8；Wherein f1, f2, f3, f4, f5, f6, f7, f8 and f meet
Following ratio: -3 <<-2；-4<<-3；4<<5；4<<5；2<<3；-3<<-2；5<<6；5<<6.Reasonable distribution is carried out according to the above ratio by the focal power to camera lens, each eyeglass is relative to system focal length f at certain
Ratio makes camera lens reasonably be corrected and be balanced in the aberration of the wave-length coverage of 420~850nm.
In the present embodiment, the f5 and f6 completely be must satisfy: -1.2 <<-0.6.So that camera lens is can be in high temperature and low
Warm blur-free imaging makes temperature drift zero, under the conditions of severe temperature can high definition imaging, no defocus is rear to organize the aspherical focal length of two panels
Focal power ratio must satisfy conditions above.
In the present embodiment, the first non-spherical lens B-2 and the second non-spherical lens B-3 are plastic material manufacture.
In the present embodiment, eyeglass B positive light coke aberration, rear two organized in eyeglass B are organized after preceding group of eyeglass A negative power correction
Piece non-spherical lens corrects all senior aberrations.Entire camera lens guarantees camera lens refractive index and the distribution of focal power approximate ratio, guarantees
The harmony of the incidence angle size of forward and backward group of eyeglass improves manufacturing feasibility to reduce the sensibility of camera lens.By reasonable
Each eyeglass focal length is distributed, keeps imaging system spherical aberration and the curvature of field small simultaneously, guarantees axle center and off-axis visual field image quality.Pass through the above eyeglass
The optical system of composition, total length of light path is shorter, then camera lens is small in size；Burnt big afterwards, can be cooperated with the video camera of multiple interfaces makes
With.Wherein the first non-spherical lens B-2, the second non-spherical lens B-3 are two panels plastic aspherical element, and image quality is good, at low cost；Preceding group
Eyeglass A negative power, rear to organize eyeglass B positive light coke, guaranteeing still can normal use in high and low temperature environment.Wherein meniscus lens A-1,
Biconcave lens A-2, meniscus lens A-3 constitute the compensation group that the preceding group of camera lens that focal power is negative serves as entire zoom lens, biconvex
What the focal power that lens B-1, the first aspherical B-2, the second aspherical B-3, meniscus lens B-4, meniscus lens B-5 are constituted was positive
Group camera lens serves as the zoom group of entire zoom lens afterwards, when zoom group moves entire camera lens focus to the movement of diaphragm direction
It is dynamic, it realizes zoom, while compensation group also starts the image planes amount of movement after the motion compensation zoom of diaphragm direction, realizes zoom.Simultaneously
Guarantee that image planes position can blur-free imaging.In the present embodiment, by the movement of zoom and compensation group, it can be achieved that focal length from 3.1mm to
The variation of 6.2mm, while image planes blur-free imaging is kept, realize 2 times of zooms.
In the present embodiment, the parameter of each eyeglass is as shown in the table:
Following optical index has been reached by the optical system that above-mentioned eyeglass forms:
(1) short focus focal length: f=3.1mm；Focal length focal length: f=6.2mm；
(2) short focus relative aperture F=2.0；Focal length relative aperture F=2.6；
(3) short focus field angle: 2w >=140 °；Focal length field angle: 2w >=60 ° (image space is as 2 η ' of visual field >=Ф 6.9mm)；
(4) short focus TV distorts: < -14%；Focal length TV distortion: < -2.2%；
(5) it resolution ratio: can be adapted to 6,000,000 pixel high-resolution CCD or cmos camera；
(6) total length of light path ∑≤31mm, optics rear cut-off distance L ' >=4mm；
(7) it is applicable in spectral line range: 420nm~850nm.
In the present embodiment, focused from short focus so that the MTF under visible light central vision image quality optimal cases schemes (shown in Fig. 3)
It can be seen that figure medium spatial frequency 120lp/mm, MTF are greater than 0.3, it is imaged outstanding.It focuses from short focus so that visible light central vision
Corresponding night vision MTF figure (shown in Fig. 4) under image quality optimal cases it can be seen that, figure medium spatial frequency 120lp/mm, MTF are greater than 0.3,
It is imaged outstanding.From focal length focus so that under visible light central vision image quality optimal cases MTF figure (shown in Fig. 5) it can be seen that, figure
Medium spatial frequency 120lp/mm, MTF are greater than 0.3, are imaged outstanding；It focuses from focal length so that the best feelings of visible light central vision image quality
Corresponding night vision MTF figure (shown in Fig. 6) under condition, figure medium spatial frequency 120lp/mm, MTF are greater than 0.3, are imaged outstanding.
Utility model has the advantages that structure is simple, and it is small in size, height is realized with ultralow cost using plastic aspherical element
Clear camera shooting is horizontal, realizes 2 times of zooms, reasonable distribution focal power, in the severe of different temperatures using zoom group and compensation group are mobile
Environment still can cleverly arrange aspherical position, while configuring most glimmer circle, realize structure microminiature varifocal mirror at perfect picture
Head.
The above is only the preferred embodiment of the present invention, it is all done according to present utility model application the scope of the patents it is equal
Deng variation and modification, it should all belong to the covering scope of the utility model.
Claims (6)
1. a kind of 2 times of high definition zoom glass of compact type mould camera lens, it is characterised in that: the optical system of the camera lens includes that edge enters
Penetrate preceding group of eyeglass A that the focal power that optical path is set gradually from front to back is negative and focal power is positive rear group of eyeglass B, described preceding group
Eyeglass A includes the meniscus lens A-1, biconcave lens A-2 and meniscus lens A-3 set gradually from front to back；Mirror is organized after described
Piece B includes the biconvex lens B-1 set gradually from front to back, the first non-spherical lens B-2, the second non-spherical lens B-3, bent moon
Lens B-4 and meniscus lens B-5.
2. 2 times of high definition zoom glass of a kind of compact type according to claim 1 mould camera lens, it is characterised in that: described curved
The airspace of moon lens A-1 and biconcave lens A-2 is 4.05mm, between the biconcave lens A-2 and the air of meniscus lens A-3
The airspace for being divided into 0.1mm, the meniscus lens A-3 and biconvex lens B-1 is 8.76mm, the biconvex lens B-1 and the
The airspace of one non-spherical lens B-2 is 0.55mm's, the first non-spherical lens B-2 and the second non-spherical lens B-3
Airspace is 0.1mm, and the airspace of the second non-spherical lens B-3 and meniscus lens B-4 are 0.45mm, the bent moon
The airspace of lens B-4 and meniscus lens B-5 are 0.1mm.
3. 2 times of high definition zoom glass of a kind of compact type according to claim 1 mould camera lens, it is characterised in that: the mirror
The focal length of the optical system of head is f, meniscus lens A-1, biconcave lens A-2, meniscus lens A-3, biconvex lens B-1, first non-
Spherical lens B-2, the second non-spherical lens B-3, meniscus lens B-4 and the corresponding focal length of meniscus lens B-5 be respectively f1,
f2,f3,f4,f5,f6,f7,f8；Wherein f1, f2, f3, f4, f5, f6, f7, f8 and f meet following ratio: -3 <<-2；-4
<<-3；4<<5；4<<5；2<<3；-3<<-2；5<<6；5<<6。
4. 2 times of high definition zoom glass of a kind of compact type according to claim 3 mould camera lens, it is characterised in that: the f5
It completely must satisfy with f6: -1.2 <<-0.6。
5. a kind of 2 times of high definition zoom glass of compact type according to claim 1 mould camera lenses, it is characterised in that: described the
One non-spherical lens B-2 and the second non-spherical lens B-3 is plastic material manufacture.
6. 2 times of high definition zoom glass of a kind of compact type according to claim 1 mould camera lens, it is characterised in that: described curved
An optical filter is additionally provided on rear side of moon lens B-5.
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| CN109324400A (en) * | 2018-11-23 | 2019-02-12 | 福建福光股份有限公司 | A kind of 2 times of high definition zoom glass modeling camera lenses of compact type and its imaging method |
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| CN109324400A (en) * | 2018-11-23 | 2019-02-12 | 福建福光股份有限公司 | A kind of 2 times of high definition zoom glass modeling camera lenses of compact type and its imaging method |
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