CN208297821U - High-resolution, big image planes, small size, infrared confocal zoom lens - Google Patents
High-resolution, big image planes, small size, infrared confocal zoom lens Download PDFInfo
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- CN208297821U CN208297821U CN201820744233.6U CN201820744233U CN208297821U CN 208297821 U CN208297821 U CN 208297821U CN 201820744233 U CN201820744233 U CN 201820744233U CN 208297821 U CN208297821 U CN 208297821U
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Abstract
The utility model relates to optical lens technology fields, more particularly to a kind of high-resolution, big image planes, small size, infrared confocal zoom lens, be successively arranged from object side to image side: the first lens group, the focal length that focal length is positive are negative the 4th lens group and sensitive chip that the third lens group that the second lens group, iris diaphgram, focal length be positive, focal length are positive；First lens group, iris diaphgram and the third lens faciation fix sensitive chip, second lens group and the 4th lens group can be moved forward and backward with respect to sensitive chip, camera lens is from short focus into long-focus change procedure, second lens group is gradually mobile to the third lens group, and the 4th lens group realizes the effect of focusing relative to sensitive chip when mobile；The third lens group includes three pieces of lens, and one piece of non-spherical lens that one piece of non-spherical lens being provided with and the second lens group are equipped with can carry out the correction of aberration；One piece of non-spherical lens that 4th lens group is equipped with can carry out the correction of the curvature of field.
Description
Technical field
The utility model relates to optical lens technology field, more particularly to a kind of high-resolution, big image planes, small size,
Infrared confocal zoom lens.
Background technique
Zoom lens is widely applied in daily life at present, and Vehicles Collected from Market is toward the side of high-resolution and high image quality
It is bigger using pixel in order to obtain better image quality to development, the more chips of pixel be solve the problems, such as it is basic
One of approach, but current safety monitoring, monitoring road conditions device have the following disadvantages:
Common zoom lens can not often accomplish that big image planes are compatible with volume, and image planes increase can cause camera lens volume simultaneously
Change dramatically, the monitoring camera of big picture currently on the market, such as 1 " camera lens of left and right, image planes size reaches 16.0mm,
Its volume is bigger, and is mostly tight shot, is difficult to control when monitoring distance and changing；
The monitoring camera resolution ratio of the high image quality on the market of mainstream is lower at present, mostly 1080p, pixel number 2,000,000
, however as the promotion of data transmission bauds, the picture transmission of higher image quality is possibly realized, and 2,000,000 pixels cannot expire
Sufficient demand；The camera lens image planes of the 1080P of mainstream are mainly 1/2.8 at present ", use the 1/ of effective imaging face diagonal 6.2mm
2.8 " chip of CMOS, pixel size only have 2.8 μm, and resolution ratio is not very high；And due to pixel very little, sense
The performances such as photosensitiveness and color rendition are all less desirable, are badly in need of performance improvement；
Monitoring camera currently on the market, mostly non-infrared confocal camera lens, therefore the more occasion of optical wavelength section such as
When at dusk, or at night having part lighting, the picture of shooting can not be integrally clear, always has obscure portions；
Utility model content
Based on this, it is necessary in view of the above technical problems, provide a kind of zoom lens, with reach high-resolution, big image planes,
Small size, infrared confocal effect.
A kind of high-resolution, big image planes, small size, infrared confocal zoom lens, are successively arranged from object side to image side:
The first lens group, the focal length that focal length is positive are negative the third lens that the second lens group, iris diaphgram, focal length are positive
The 4th lens group and sensitive chip that group, focal length are positive；
First lens group, iris diaphgram and the third lens faciation fix sensitive chip, the second lens group and the 4th lens
Group can be moved forward and backward with respect to sensitive chip；Camera lens is from short focus into long-focus change procedure, and the second lens group is gradually to third
Lens group is mobile, and the 4th lens group realizes the effect of focusing relative to sensitive chip when mobile；
Second lens group is equipped with one piece of non-spherical lens；The third lens group includes three pieces of lens, is provided with one piece of aspheric
Face lens；4th lens group is equipped with one piece of non-spherical lens.
In one of the embodiments, the third lens group be successively arranged from object side to image side the 7th lens that focal length is positive,
The 9th lens that the 8th lens and focal length that focal length is positive are negative；7th lens are non-spherical lens.
In one of the embodiments, the 4th lens group be successively arranged from object side to image side the tenth lens that focal length is positive,
The 12nd lens that the 11st lens and focal length that focal length is negative are positive；Tenth lens and the 11st lens are balsaming lens, the
12 lens are non-spherical lens.
The image side surface of the 12nd lens is convex surface in one of the embodiments,.
The non-spherical lens is glass aspheric lenses in one of the embodiments,.
In one of the embodiments, the second lens group be successively arranged from object side to image side the 4th lens that focal length is negative,
The 6th lens that the 5th lens and focal length that focal length is negative are positive；The refractive index of 4th lens is greater than or equal to 1.6, and Abbe number is small
In or equal to 50.
In one of the embodiments, the first lens group be successively arranged that focal length is negative from object side to image side surface first thoroughly
The third lens that the second lens and focal length that mirror, focal length are positive are positive；First lens and the second lens are balsaming lens.
In one of the embodiments, the spacing distance between the first lens group and the third lens group be 36.5mm, second
Spacing distance between lens group and the third lens group is 2.3mm~18.95mm, between the third lens group and the 4th lens group
Spacing distance is 0.9mm~9.58mm, and the distance between the 4th lens group and sensitive chip are 18.5mm~29.2mm.
The utility model compared with prior art, has at least the following advantages:
1, the zoom lens of the utility model has been used containing 12 pieces of lens including 3 pieces of aspherical glass lens, less
Higher quality, and small volume are obtained in the case where quantity, the transmitance of camera lens is also higher；
2, camera lens FNO=EFL/D, EFL are focal length, and D is diaphragm diameter；For imaging lens, diaphragm diameter is bigger, light passing
It measures bigger；Due to sensor meeting adjust automatically exposure value under general environment, at this time just than less going out FNO numerical value difference camera lens
Quality, but under the environmental condition of low-light (level), exposure sensor has arrived the limit, therefore the small camera lens of FNO numerical value is than preferable
Performance；The zoom lens of the utility model uses iris diaphgram, and reaches 1.5 in nearly coke end FNO., and at focal length end, FNO reaches
To 2.4, there is high photosensitive property, in the case where adjusting aperture variation, is suitble to use under a variety of illuminating positions, can also adjust
Clarity is saved, lens effect is improved；
3, the zoom lens of the utility model uses glass aspheric lenses, and plastic aspheric lens, therefore temperature is not used
Degree variation influences very little to the performance of camera lens, can be used in a variety of contexts；
4, the zoom lens of the utility model has used 4 lens groups, and the interval between 4 lens groups is variation,
The variation at the interval between preceding 3 lens groups makes the focal length of camera lens change, the 4th lens group for realizing focus function,
Camera lens reaches 12mm in short focus focal length, and focal length focal length is greater than 40mm；
5, the entire camera lens of the utility model is using the first lens group as highest point, and between the first lens group and sensitive chip
Distance be it is not changed, length be less than 110mm, use 1 " in the camera lens of CCD, small volume；
6, the utility model can be realized the resolution ratio higher than 14,000,000 pixels, by the 1 of 16.05mm " CCD for, this
Utility model can achieve center resolution higher than 180lp/mm, periphery 0.7H (70% diagonal positions) high resolution in
The effect of 200lp/mm；
7, the zoom lens of the utility model realizes AF automatic focusing function using the 4th lens group, from farthest infinity
Can be at clearly image to nearest 1000mm microspur, imaging effect is good；
8, the camera lens of the utility model realizes whole infrared confocal, in visible wavelength section 430nm-650nm and infrared
Lamp wavelength period 830nm-870nm can reach clearly simultaneously, therefore existing for a variety of wave bands under the conditions of keeps picture entirety all clear
It is clear；
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model one embodiment.
Specific embodiment
It is further described below in conjunction with Fig. 1:
A kind of high-resolution, big image planes, small size, infrared confocal zoom lens, are successively arranged from object side to image side:
The first lens group 1, the focal length that focal length the is positive third that the second lens group 2, iris diaphgram 6, focal length are positive that is negative are saturating
The 4th lens group 4 and sensitive chip 5 that lens group 3, focal length are positive；
First lens group 1, iris diaphgram 6 and the third lens group 3 are fixed with respect to sensitive chip 5, the second lens group 2 and the 4th
Lens group 4 can be moved forward and backward with respect to sensitive chip 5, and camera lens is from short focus into long-focus change procedure, and the second lens group 2 is gradually
Mobile to the third lens group 3, the 4th lens group 4 realizes the effect of focusing relative to sensitive chip 5 when mobile；
The third lens group 3 includes three pieces of lens, what the one piece of non-spherical lens and the second lens group 2 being provided with were equipped with
One piece of non-spherical lens can carry out the correction of aberration；One piece of non-spherical lens that 4th lens group 4 is equipped with can carry out the curvature of field
Correction；
Wherein, the surface shape of above-mentioned non-spherical lens meets following relationship:
In formula, parameter c is curvature corresponding to radius, and r is radial coordinate, and unit is identical with length of lens unit, and k is
Circular cone whose conic coefficient, when k-factor is less than -1, face shape curve is hyperbola, is parabola when k-factor is equal to -1, works as k
It is ellipse when coefficient is between -1 to 0, is circle when k-factor is equal to 0, is oblateness, α 1 to α 8 when k-factor is greater than 0
Coefficient corresponding to each radial coordinate is respectively indicated, the geomery of non-spherical lens can be accurately set by the above parameter.
The third lens group 3 is successively arranged the 7th lens that focal length is positive from object side to image side in one of the embodiments,
301, the 9th lens 303 that the 8th lens 302 and focal length that focal length is positive are negative；7th lens 301 are non-spherical lens, can school
Positive major part aberration；Under the collective effect of three pieces of lens, spherical aberration can be effectively reduced, correcting chromatic aberration, reach infrared light with can
It is light-exposed have the effect of it is confocal.
The 4th lens group 4 is successively arranged the tenth lens that focal length is positive from object side to image side in one of the embodiments,
401, the 12nd lens 403 that the 11st lens 402 and focal length that focal length is negative are positive；Tenth lens 401 and the 11st lens
402 be balsaming lens, can play the effect of focusing, and the 12nd lens 403 are non-spherical lens, can greatly reduce the curvature of field,
The positive and negative composite structure of 4th each piece of the lens group focal length of lens can effectively reduce the aberration variation of camera lens in zooming procedure.
The image side surface of the 12nd lens 403 is convex surface in one of the embodiments, can eliminate camera lens and veiling glare occurs
A possibility that, significant increase imaging effect.
The non-spherical lens is glass aspheric lenses in one of the embodiments, and it is saturating that plastic aspherical element is not used
Mirror, therefore temperature change influences very little to the performance of camera lens, can be used in a variety of contexts.
The second lens group 2 is successively arranged the 4th lens that focal length is negative from object side to image side in one of the embodiments,
201, the 6th lens 203 that the 5th lens 202 and focal length that focal length is negative are positive；4th lens 201 are high refractive index, high dispersion
Lens made of material, refractive index are greater than or equal to 1.6, and Abbe number is less than or equal to 50, can effectively correct camera lens and exist
The distortion at short focus end, while the resolution ratio under short focus state can be greatly improved.
The focal length of the first lens 101 is negative in one of the embodiments, and the focal length of the second lens 102 is positive, and third is saturating
The focal length of mirror 103 is positive；First lens 101 and the second lens 102 are balsaming lens.
The spacing distance between the first lens group 1 and the third lens group 3 is 36.5mm in one of the embodiments, the
Spacing distance between two lens groups 2 and the third lens group 3 is 2.3mm~18.95mm, the third lens group 3 and the 4th lens group 4
Between spacing distance be 0.9mm~9.58mm, the distance between the 4th lens group 4 and sensitive chip 5 for 18.5mm~
29.2mm。
As shown in table 1, it is an actual design case of the utility model:
Table 1
As shown in table 2, it is the asphericity coefficient of each non-spherical lens in one actual design case of the utility model:
Table 2
Claims (8)
1. a kind of high-resolution, big image planes, small size, infrared confocal zoom lens, it is characterised in that: from object side to image side according to
It is secondary to be equipped with:
The first lens group (1), the focal length that focal length is positive are negative the third that the second lens group (2), iris diaphgram (6), focal length are positive
The 4th lens group (4) and sensitive chip (5) that lens group (3), focal length are positive；
First lens group (1), iris diaphgram (6) and the third lens group (3) are fixed with respect to sensitive chip (5), the second lens group (2)
It can opposite sensitive chip (5) back-and-forth motion with the 4th lens group (4)；Camera lens from short focus into long-focus change procedure, second
Lens group (2) is gradually mobile to the third lens group (3), and the 4th lens group (4) realizes focusing when mobile relative to sensitive chip (5)
Effect；
Second lens group (2) is equipped with one piece of non-spherical lens；The third lens group (3) include three pieces of lens, be provided with one piece it is non-
Spherical lens；4th lens group (4) is equipped with one piece of non-spherical lens.
2. high-resolution according to claim 1, big image planes, small size, infrared confocal zoom lens, feature exist
In: the third lens group (3) be successively arranged from object side to image side that the 7th lens (301), the focal length that focal length is positive be positive the 8th thoroughly
The 9th lens (303) that mirror (302) and focal length are negative；7th lens (301) are non-spherical lens.
3. high-resolution according to claim 1, big image planes, small size, infrared confocal zoom lens, feature exist
The 11st that the tenth lens (401), the focal length that focal length is positive are negative is successively arranged from object side to image side in: the 4th lens group (4)
The 12nd lens (403) that lens (402) and focal length are positive；Tenth lens (401) and the 11st lens (402) are glued saturating
Mirror；12nd lens (403) are non-spherical lens.
4. high-resolution according to claim 3, big image planes, small size, infrared confocal zoom lens, feature exist
In: the image side surface of the 12nd lens (403) is convex surface.
5. high-resolution according to claim 1, big image planes, small size, infrared confocal zoom lens, feature exist
In: the non-spherical lens is glass aspheric lenses.
6. high-resolution according to claim 1, big image planes, small size, infrared confocal zoom lens, feature exist
In: the second lens group (2) be successively arranged from object side to image side that the 4th lens (201), the focal length that focal length is negative be negative the 5th thoroughly
The 6th lens (203) that mirror (202) and focal length are positive；The refractive index of 4th lens (201) is greater than or equal to 1.6, and Abbe number is small
In or equal to 50.
7. high-resolution according to claim 1, big image planes, small size, infrared confocal zoom lens, feature exist
In: the first lens group (1) be successively arranged from object side to image side that the first lens (101), the focal length that focal length is negative be positive second thoroughly
The third lens (103) that mirror (102) and focal length are positive；First lens (101) and the second lens (102) are balsaming lens.
8. high-resolution according to claim 1, big image planes, small size, infrared confocal zoom lens, feature exist
In: the spacing distance between the first lens group (1) and the third lens group (3) is 36.5mm, the second lens group (2) and the third lens
Spacing distance between group (3) is 2.3mm~18.95mm, the interval distance between the third lens group (3) and the 4th lens group (4)
From for 0.9mm~9.58mm, the distance between the 4th lens group (4) and sensitive chip (5) are 18.5mm~29.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820744233.6U CN208297821U (en) | 2018-05-18 | 2018-05-18 | High-resolution, big image planes, small size, infrared confocal zoom lens |
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| CN201820744233.6U CN208297821U (en) | 2018-05-18 | 2018-05-18 | High-resolution, big image planes, small size, infrared confocal zoom lens |
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| CN208297821U true CN208297821U (en) | 2018-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681052A (en) * | 2018-05-18 | 2018-10-19 | 中山联合光电科技股份有限公司 | High-resolution, big image planes, small size, infrared confocal varifocal optical system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681052A (en) * | 2018-05-18 | 2018-10-19 | 中山联合光电科技股份有限公司 | High-resolution, big image planes, small size, infrared confocal varifocal optical system |
| CN108681052B (en) * | 2018-05-18 | 2023-07-21 | 中山联合光电科技股份有限公司 | High-resolution, large-image-plane, small-volume and infrared confocal zoom optical system |
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