CN205485022U - Optical system of high magnification - Google Patents
Optical system of high magnification Download PDFInfo
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- CN205485022U CN205485022U CN201620246677.8U CN201620246677U CN205485022U CN 205485022 U CN205485022 U CN 205485022U CN 201620246677 U CN201620246677 U CN 201620246677U CN 205485022 U CN205485022 U CN 205485022U
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- lens
- lens group
- focal length
- sensitive chip
- optical system
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Abstract
The utility model discloses an optical system of high magnification, including fixed sensitization chip, one side of sensitization chip be equipped with the first lens crowd of relative sensitization chip rigidity, first lens crowd's focus for just, first lens crowd and sensitization chip between be equipped with can relative sensitization chip back -and -forth movement second lens crowd, second lens crowd the focus for the burden, second lens crowd and sensitization chip between be equipped with with sensitization chip relatively fixed's third lens crowd, third lens crowd's focus for just, third lens crowd and second lens crowd between be equipped with the diaphragm of rigidity, third lens crowd and sensitization chip between still be equipped with can relative sensitization chip back -and -forth movement fourth lens crowd, fourth lens crowd's focus for just. The utility model discloses simple structure, big image planes, high magnification, high resolution, the infrared 30 times confocal continuous zooming of short burnt end.
Description
[technical field]
This utility model relates to a kind of optical system, a kind of powerful optical system.
[background technology]
Currently in order to the demand in monitoring market, monitoring camera Radix Rumicis and remote comprehensive use occasion utilization increasingly
Many, it is therefore desirable to the monitoring camera of the continuous vari-focus of bigger multiplying power；
The market demand of monitoring camera at present, infrared confocal with visible ray in wide-angle side demand, and at focal length end aberration
Require less；But there is the deficiency of following aspect in monitoring camera in the market: 1, tradition monitoring camera is how non-infrared common
Zoom lens, when having part lighting at night, the picture of shooting cannot be overall clear, always has obscure portions；2, resolution
Mainly 720P's and 1080P, resolution is low；3, the chip that monitoring camera uses is relatively small, and the pixel of chip is less, especially
It is in the environment of dark, and image effect is bad.
Therefore, this utility model is based on above deficiency and produces.
[utility model content]
This utility model purpose is to overcome the deficiencies in the prior art, it is provided that a kind of simple in construction, big image planes, high magnification,
High-resolution, the high magnification optical system of the short burnt infrared 30 times of confocal continuous vari-focus of end.
This utility model is achieved through the following technical solutions:
A kind of powerful optical system, it is characterised in that:
Including the sensitive chip 5 fixed, the side of described sensitive chip 5 is provided with what relative sensitive chip 5 position was fixed
First lens group 1, the focal length of the first described lens group 1 is just, is provided with between described the first lens group 1 and sensitive chip 5
Energy the second movable lens group 2 of sensitive chip 5 relatively, the focal length of the second described lens group 2 is negative, and described second is saturating
Threeth lens group 3 relatively-stationary with sensitive chip 5 it is provided with between lens group 2 and sensitive chip 5, the 3rd described lens group 3
Focal length is just, is provided with the diaphragm 6 that position is fixing, the 3rd described lens between described the 3rd lens group 3 and the second lens group 2
The 4th movable lens group 4 of the relative sensitive chip of energy 5, the 4th described lens group it is additionally provided with between group 3 and sensitive chip 5
The focal length of 4 is just.
Powerful optical system as above, it is characterised in that: the first described lens group 1 includes towards sensitive chip
The first lens the 11, second lens the 12, the 3rd lens the 13, the 4th lens 14 and the 5th lens 15 that 5 directions set gradually, described
First lens 11 and the 3rd lens 13 are all that focal length is negative and concave surface is towards the falcate spherical lens of sensitive chip 5, described
The second lens the 12, the 4th lens 14 and the 5th lens 15 be all focal length be positive falcate spherical lens, described first is saturating
Mirror 11 and the second lens 12 are adhesively-bonded together to form balsaming lens, and the 3rd described lens 13 and the 4th lens 14 are bonded together
Form balsaming lens.
Powerful optical system as above, it is characterised in that: the second described lens group 2 includes towards sensitive chip
The 6th lens the 21, the 7th lens 22 and the 8th lens 23 that 5 directions set gradually, the 6th described lens 21 be focal length be negative
Falcate aspherical lens, the 7th described lens 22 be focal length be negative concave-concave spherical lens, the 8th described lens 23 are
Focal length is positive falcate aspherical lens, and its concave surface is towards sensitive chip 5.
Powerful optical system as above, it is characterised in that: the 3rd described lens group 3 includes towards photosensitive core
The 9th lens the 31, the tenth lens the 32 and the 11st lens 33 that sheet 5 direction sets gradually, the 9th described lens 31 are that focal length is
Positive biconvex aspherical lens, the tenth described lens 32 be focal length be positive biconvex spherical lens, the 11st described lens
33 be focal length be negative aspherical lens.
Powerful optical system as above, it is characterised in that: the 4th described lens group 4 includes towards sensitive chip
The 12nd lens the 41, the 13rd lens the 42, the 14th lens the 43 and the 15th lens 44 that 5 directions set gradually, described
12 lens 41 be focal length be negative falcate eyeglass, the 13rd described lens 42 be focal length be positive falcate eyeglass, institute
The 14th lens 43 stated be focal length be positive falcate spherical lens, the 15th described lens 44 be focal length be positive aspheric
Face eyeglass.
Powerful optical system as above, it is characterised in that: described first lens group the 1, second lens group 2,
Eyeglass in 3rd lens group 3 and the 4th lens group 4 is glass lens.
Powerful optical system as above, it is characterised in that: the moving range of the second described lens group 2 is 0
～40.75mm, the moving range of the 4th described lens group 4 is 0～32.25mm, between described diaphragm 6 and sensitive chip 5
Distance is 57.1mm, and the described distance between the first lens group 1 and the 3rd lens group 3 is 48.5mm.
Powerful optical system as above, it is characterised in that: the described aspherical lens in the 3rd lens group 3
Aspherical surface shape meet below equation: In formula, ginseng
Number c is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone system of conics
Number；When k-factor is less than-1, the face sigmoid curves of eyeglass is hyperbola, and when k-factor is equal to-1, the face sigmoid curves of eyeglass is for throwing
Thing line；When k-factor is between-1 to 0, the face sigmoid curves of eyeglass is oval, and when k-factor is equal to 0, the face shape of eyeglass is bent
Line is circular, and when k-factor is more than 0, the face sigmoid curves of eyeglass is oblate；α1To α8Represent respectively corresponding to each radial coordinate
Coefficient.
Powerful optical system as above, it is characterised in that: described second lens group 2 from short focus to focal length
Away from change procedure in gradually draw close to diaphragm 6, the 4th described lens group 4 is according to the movement of the second lens group 2 and object distance
Change makes imaging surface fall on sensitive chip 5.
Powerful optical system as above, it is characterised in that: when optical system is under different focal lengths and environment
During work, the caliber size of diaphragm 6 changes automatically.
Compared with prior art, this utility model has the following advantages:
1, this utility model employs 4 lens groups, and the second lens group moves forward and backward, and the focal length of optical system becomes
Changing, the 4th lens group also can move forward and backward, for focus function, so that this utility model optical system focal length can be at 8mm-
Changing between 240mm, reach 30 times of zooms, shooting angle level changes between 60 ° to 2 °, and shooting distance recently can be extremely
0.5m, is suitable for using in a variety of contexts.
2, this utility model can reach the resolution higher than 8M (pixel 8,000,000 pixel), reaches with diagonal-size
The 2/3 of 12.0mm " CCD as a example by, this utility model can reach center resolution higher than 250lp/mm, and periphery 0.8H
(80% diagonal positions) resolution is higher than 125lp/mm.
3, this utility model optical system achieve front 6 times infrared confocal, in visible wavelength section 430nm-650nm and red
Outer lamp wavelength period 830nm-870nm can reach clear simultaneously, relatively big in field range, and the ring that multi-wavelength's light source exists
Under border, whole picture is clear.
4, this utility model employs altogether 15 pieces of eyeglasses, and has 5 pieces of Glass aspheric eyeglasses, well corrects each
Item difference, makes optical system have good quality.
5, with the first lens group as peak in this utility model optical system, the first lens group and the distance and position of image planes
Being fixing, its maximum height is less than 130mm, it is ensured that the function admirable of whole optical system.
[accompanying drawing explanation]
Fig. 1 is this utility model system optics figure.
[detailed description of the invention]
Below in conjunction with the accompanying drawings this utility model is further described:
A kind of powerful optical system, including the sensitive chip 5 fixed, the side of described sensitive chip 5 is provided with phase
First lens group 1 fixing to sensitive chip 5 position, the focal length of the first described lens group 1 is just, the first described lens group
The second movable lens group 2 of the relative sensitive chip of energy 5 it is provided with between 1 with sensitive chip 5, the second described lens group 2
Focal length is negative, is provided with threeth lens group relatively-stationary with sensitive chip 5 between described the second lens group 2 and sensitive chip 5
3, the focal length of the 3rd described lens group 3 is just, is provided with position and fixes between described the 3rd lens group 3 and the second lens group 2
Diaphragm 6, be additionally provided with between the 3rd described lens group 3 and sensitive chip 5 can relative sensitive chip 5 move forward and backward the 4th saturating
Lens group 4, the focal length of the 4th described lens group 4 is just.
First lens the 11, second lens 12 that the first described lens group 1 includes setting gradually towards sensitive chip 5 direction,
3rd lens the 13, the 4th lens 14 and the 5th lens 15, the first described lens 11 and the 3rd lens 13 be all focal length be negative also
And concave surface is towards the falcate spherical lens of sensitive chip 5, the second described lens the 12, the 4th lens 14 and the 5th lens 15
Be all focal length be positive falcate spherical lens, the first described lens 11 and the second lens 12 be adhesively-bonded together to form glued thoroughly
Mirror, the 3rd described lens 13 and the 4th lens 14 are adhesively-bonded together to form balsaming lens.
The second described lens group 2 includes the 6th lens the 21, the 7th lens 22 and set gradually towards sensitive chip 5 direction
8th lens 23, the 6th described lens 21 be focal length be negative falcate aspherical lens, the 7th described lens 22 are burnt
Away from for negative concave-concave spherical lens, the 8th described lens 23 be focal length be positive falcate aspherical lens, its concave surface towards
Sensitive chip 5.
The 3rd described lens group 3 includes the 9th lens the 31, the tenth lens 32 and set gradually towards sensitive chip 5 direction
11st lens 33, the 9th described lens 31 be focal length be positive biconvex aspherical lens, the tenth described lens 32 are burnt
Away from for positive biconvex spherical lens, the 11st described lens 33 be focal length be negative aspherical lens.
The 4th described lens group 4 includes the 12nd lens the 41, the 13rd lens set gradually towards sensitive chip 5 direction
42, the 14th lens the 43 and the 15th lens 44, the 12nd described lens 41 be focal length be negative falcate eyeglass, described
13rd lens 42 be focal length be positive falcate eyeglass, the 14th described lens 43 be focal length be positive falcate coquille
Sheet, the 15th described lens 44 be focal length be positive aspherical lens.
Eyeglass in first described lens group the 1, second lens group the 2, the 3rd lens group 3 and the 4th lens group 4 is glass
Glass eyeglass.
The second described lens group 2 is gradually drawn close to diaphragm 6 to the change procedure of long-focus from short focus, described
Four lens groups 4 make imaging surface fall on sensitive chip 5 according to the movement of the second lens group 2 and the change of object distance.
When optical system works under different focal lengths and environment, the caliber size of diaphragm 6 changes automatically.
It is additionally provided with flat glass 7 between described the 4th lens group 4 and sensitive chip 5.
The aspherical surface shape of the described aspherical lens in the 3rd lens group 3 meets below equation: In formula, parameter
C is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；
When k-factor is less than-1, the face sigmoid curves of eyeglass is hyperbola, and when k-factor is equal to-1, the face sigmoid curves of eyeglass is parabolic
Line；When k-factor is between-1 to 0, the face sigmoid curves of eyeglass is oval, when k-factor is equal to 0, and the face sigmoid curves of eyeglass
For circle, when k-factor is more than 0, the face sigmoid curves of eyeglass is oblate；α1To α8Represent respectively corresponding to each radial coordinate
Coefficient, can accurately set aspheric geomery by above parameter.
The moving range of the second described lens group 2 is 0～40.75mm, and the moving range of the 4th described lens group 4 is
0～32.25mm, the distance between described diaphragm 6 and sensitive chip 5 is 57.1mm, the first described lens group 1 and the 3rd lens
Distance between group 3 is 48.5mm.Following table is concrete parameter:
The asphericity coefficient in each aspheric surface face:
。
Claims (8)
1. a powerful optical system, it is characterised in that: include the sensitive chip (5) fixed, described sensitive chip (5)
Side be provided with the first lens group (1) that relative sensitive chip (5) position is fixing, the focal length of described the first lens group (1) is
Just, be provided with between described the first lens group (1) and sensitive chip (5) can relative sensitive chip (5) move forward and backward second saturating
Lens group (2), the focal length of described the second lens group (2) is negative, sets between described the second lens group (2) and sensitive chip (5)
Having and relatively-stationary 3rd lens group (3) of sensitive chip (5), the focal length of the 3rd described lens group (3) is just, described the
Being provided with the diaphragm (6) that position is fixing between three lens groups (3) and the second lens group (2), the 3rd described lens group (3) is with photosensitive
Energy the 4th lens group (4) that sensitive chip (5) is movable relatively, the 4th described lens group (4) it is additionally provided with between chip (5)
Focal length be just.
Powerful optical system the most according to claim 1, it is characterised in that: described the first lens group (1) includes
The first lens (11) of setting gradually towards sensitive chip (5) direction, the second lens (12), the 3rd lens (13), the 4th lens
(14) and the 5th lens (15), described the first lens (11) and the 3rd lens (13) are all that focal length is negative and concave surface is towards sense
The falcate spherical lens of optical chip (5), described the second lens (12), the 4th lens (14) and the 5th lens (15) are all burnt
Glued saturating away from being adhesively-bonded together to form for positive falcate spherical lens, described the first lens (11) and the second lens (12)
Mirror, the 3rd described lens (13) and the 4th lens (14) are adhesively-bonded together to form balsaming lens.
Powerful optical system the most according to claim 1, it is characterised in that: described the second lens group (2) includes
The 6th lens (21), the 7th lens (22) and the 8th lens (23) set gradually towards sensitive chip (5) direction, described the 6th
Lens (21) be focal length be negative falcate aspherical lens, the 7th described lens (22) be focal length be negative concave-concave coquille
Sheet, the 8th described lens (23) be focal length be positive falcate aspherical lens, its concave surface is towards sensitive chip (5).
Powerful optical system the most according to claim 1, it is characterised in that: the 3rd described lens group (3) includes
The 9th lens (31), the tenth lens (32) and the 11st lens (33) set gradually towards sensitive chip (5) direction, described
Nine lens (31) be focal length be positive biconvex aspherical lens, the tenth described lens (32) be focal length be positive biconvex coquille
Sheet, the 11st described lens (33) be focal length be negative aspherical lens.
Powerful optical system the most according to claim 1, it is characterised in that: the 4th described lens group (4) includes
The 12nd lens (41) that set gradually towards sensitive chip (5) direction, the 13rd lens (42), the 14th lens (43) and the tenth
Five lens (44), the 12nd described lens (41) be focal length be negative falcate eyeglass, the 13rd described lens (42) are
Focal length is positive falcate eyeglass, the 14th described lens (43) be focal length be positive falcate spherical lens, described
15 lens (44) be focal length be positive aspherical lens.
Powerful optical system the most according to claim 1, it is characterised in that: described the first lens group (1), second
Eyeglass in lens group (2), the 3rd lens group (3) and the 4th lens group (4) is glass lens.
Powerful optical system the most according to claim 1, it is characterised in that: the shifting of described the second lens group (2)
Dynamic scope is 0～40.75mm, and the moving range of the 4th described lens group (4) is 0～32.25mm, described diaphragm (6) with
Distance between sensitive chip (5) is 57.1mm, and the distance between described the first lens group (1) and the 3rd lens group (3) is
48.5mm。
Powerful optical system the most according to claim 4, it is characterised in that: in the 3rd described lens group (3)
The aspherical surface shape of aspherical lens meets below equation: In formula, ginseng
Number c is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone system of conics
Number；When k-factor is less than-1, the face sigmoid curves of eyeglass is hyperbola, and when k-factor is equal to-1, the face sigmoid curves of eyeglass is for throwing
Thing line；When k-factor is between-1 to 0, the face sigmoid curves of eyeglass is oval, and when k-factor is equal to 0, the face shape of eyeglass is bent
Line is circular, and when k-factor is more than 0, the face sigmoid curves of eyeglass is oblate；α1To α8Represent respectively corresponding to each radial coordinate
Coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620246677.8U CN205485022U (en) | 2016-03-28 | 2016-03-28 | Optical system of high magnification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620246677.8U CN205485022U (en) | 2016-03-28 | 2016-03-28 | Optical system of high magnification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205485022U true CN205485022U (en) | 2016-08-17 |
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ID=56648465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620246677.8U Active CN205485022U (en) | 2016-03-28 | 2016-03-28 | Optical system of high magnification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205485022U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597644A (en) * | 2016-12-30 | 2017-04-26 | 杭州朗奥光学科技有限公司 | High-definition projection camera lens |
| CN111435191A (en) * | 2019-01-14 | 2020-07-21 | 杭州海康威视数字技术股份有限公司 | Zoom lens, camera and monitoring equipment |
-
2016
- 2016-03-28 CN CN201620246677.8U patent/CN205485022U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597644A (en) * | 2016-12-30 | 2017-04-26 | 杭州朗奥光学科技有限公司 | High-definition projection camera lens |
| CN106597644B (en) * | 2016-12-30 | 2022-05-17 | 杭州朗奥光学科技有限公司 | High definition projection lens |
| CN111435191A (en) * | 2019-01-14 | 2020-07-21 | 杭州海康威视数字技术股份有限公司 | Zoom lens, camera and monitoring equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |