CN108459403A - High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end - Google Patents
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end Download PDFInfo
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- CN108459403A CN108459403A CN201810499710.1A CN201810499710A CN108459403A CN 108459403 A CN108459403 A CN 108459403A CN 201810499710 A CN201810499710 A CN 201810499710A CN 108459403 A CN108459403 A CN 108459403A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
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Abstract
The invention discloses high-resolution, big image planes, big multiplying power, the infrared confocal optical systems in short focus end, are disposed with from object plane to image planes：The focal length of first lens group, the first lens group is just that the first lens group includes the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens；The focal length of second lens group, the second lens group is negative, and the second lens group includes the 7th lens, the 8th lens, the 9th lens and the tenth lens；Diaphragm；The focal length of the third lens group, the third lens group is just that the third lens group includes the 11st lens, the 12nd lens, the 13rd lens, the 14th lens and the 15th lens；The focal length of 4th lens group, the 4th lens group is just that the 4th lens group includes the 16th lens, the 17th lens and the 18th lens；Sensitive chip.The optical system high resolution of the present invention, image planes are big, multiplying power is big, simple in structure.
Description
【Technical field】
The present invention relates to optical system more particularly to high-resolution, big image planes, big multiplying power, the infrared confocal optics in short focus end
System.
【Background technology】
Zoom lens is widely applied in daily life, especially the fields such as safety monitoring, to wide-angle and focal length
The camera lens demand of integrated application is increasing.
The direction of Vehicles Collected from Market toward high-resolution and super large multiplying power is developed, and in order to obtain better image quality, uses picture
Vegetarian refreshments bigger, the more chips of pixel are one of the fundamental ways solved the problems, such as, but current safety monitoring, monitoring road conditions
Device has the disadvantage that：
1. short focus end is not infrared confocal, when having part lighting at night, the picture of shooting can not be integrally clear, always
There is segment angle stamping die paste；The big universal pixel of multiplying power camera lens is low in the market, and resolution ratio is mainly 720P and 1080P；
2. the chip that mainstream monitoring camera currently on the market uses is relatively small, the pixel of chip is smaller, 1080P's
The chip for the CMOS that camera lens image planes are mainly 1/2.8 ", use the 1/2.8 of effectively imaging face diagonal 6.2mm ", pixel
Size only has 2.8 μm, and resolution ratio is not very high；In dark conditions, shooting image quality is bad；
3. common zoom lens can not often accomplish that big multiplying power is compatible with volume, multiplying power increases can cause lens body simultaneously
Long-pending change dramatically, the monitoring camera for being more than zoom and reaching 50 times currently on the market, maximum caliber are generally higher than 100mm；
4. the more powerful camera lens of current direct current focal length end using when it is easy to appear camera lens shake and be difficult to shoot
To stable picture, therefore there is an urgent need to camera lenses stabilization function；
5. current monitoring camera needs are infrared confocal with visible light in wide-angle side demand, the monitoring camera on field is how non-red
Outer confocal camera lens, when having part lighting at night, the picture of shooting can not be integrally clear, always has obscure portions, has
Even if camera lens is accomplished infrared confocal but purple boundary can be made to increase.
Therefore, the present invention is based on above deficiency and generates.
【Invention content】
The technical problem to be solved in the present invention is to provide high-resolution, big image planes, big multiplying power, short focus end be infrared confocal and band
Have optical anti-vibration is more than 75 times of continuous zooming optical systems；The systemic resolution is high, image planes are big, multiplying power is big, simple in structure.
In order to solve the above technical problems, present invention employs following technical proposals：It is high-resolution, big image planes, big multiplying power, short
The burnt infrared confocal optical system in end, which is characterized in that be disposed with from object plane to image planes：
Can fixed first lens group of image planes, the focal length of the first lens group be relatively just that the first lens group includes from object
The first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens that face to image planes are set gradually；
The second lens group that the opposite image planes of energy are moved forward and backward, the focal length of the second lens group is negative, and the second lens group includes
The 7th lens, the 8th lens, the 9th lens and the tenth lens set gradually from object plane to image planes；
Diaphragm；
Can the fixed the third lens group of image planes, the focal length of the third lens group be relatively just that the third lens group includes from object
The 11st lens, the 12nd lens, the 13rd lens, the 14th lens and the 15th lens that face to image planes are set gradually；
The 4th lens group that the opposite image planes of energy are moved forward and backward, the focal length of the 4th lens group are just that the 4th lens group includes
The 16th lens, the 17th lens and the 18th lens set gradually from object plane to image planes；
Sensitive chip.
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end as described above, which is characterized in that institute
It is negative to state first focal length of lens, and the first lens are falcate structure, and concave surface is towards sensitive chip direction；The focal length of second lens
For just, two faces of the second lens are convex surface, and the focal length of the third lens is that just, the third lens are falcate structure, and the 4th thoroughly
The focal length of mirror is that just, the 4th lens are falcate structure, and the focal lengths of the 5th lens be negative, and the 5th lens are falcate structure, and
Towards sensitive chip direction, the focal length of the 6th lens is that just, the 6th lens are curved month type structure for concave surface；First lens and institute
It states the second lens to bond by optical glue, the 5th lens are bonded with the 6th lens by optical glue.
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end as described above, which is characterized in that the
The focal length of seven lens is negative, and is curved month type structure, and the focal length of the 8th lens is negative, and is curved month type structure, the 9th lens
Focal length is negative, and two faces of the 9th lens are concave surface, and the focal lengths of the tenth lens is that just, and two faces of the tenth lens are
Convex surface；9th lens are bonded with the tenth lens by optical glue.
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end as described above, which is characterized in that the
The focal length of 11 lens is just that and two faces of the 11st lens are convex surface；The focal length of 12nd lens is the just and the 12nd
Two faces of lens are convex surface, and the focal length of the 13rd lens is negative, and the focal length of the 14th lens is the just coke of the 15th lens
Away from being negative；12nd lens are bonded with the 13rd lens by optical glue, the 14th lens and the 15th
Lens are bonded by optical glue.
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end as described above, which is characterized in that the
The focal length of 16 lens is that just, the focal length of the 17th lens is negative, and the focal length of the 18th lens is just；Described 16th thoroughly
Mirror is bonded with the 17th lens by optical glue.
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end as described above, which is characterized in that institute
The first lens for stating, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 9th lens, the tenth lens,
12nd lens, the 13rd lens, the 14th lens, the 15th lens, the 16th lens and the 17th lens are glass marble
Face lens, the 7th lens, the 8th lens, the 11st lens and the 18th lens are glass aspheric lenses.
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end as described above, which is characterized in that institute
The aspherical surface shape of the 7th lens, the 8th lens, the 11st lens and the 18th lens stated meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and r is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient, α1To α8The coefficient corresponding to each radial coordinate is indicated respectively；When k-factor is less than -1, thoroughly
The face shape curve of mirror is hyperbola；When k-factor is equal to -1, the face shape curve of lens is parabola；When k-factor is between -1 to 0
Between when, the face shape curves of lens is ellipse, and when k-factor is equal to 0, the face shape curve of lens is circle, when k-factor is more than 0
When, the face shape curve of lens is oblateness.
High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end as described above, which is characterized in that institute
The second lens group stated is 0~145mm with respect to the moving range of sensitive chip, and the 4th lens group is with respect to sensitive chip
Moving range is 0~66mm, and the diaphragm is 50mm, first lens group and the third lens at a distance from sensitive chip
The distance of group is 143mm.
Compared with prior art, high-resolution of the invention, big image planes, big multiplying power, the infrared confocal optical system in short focus end,
Following effect is reached：
1, present invention uses 4 lens groups, with the front and back shifting between the first lens group, three lens groups of the second lens group
Dynamic, focal length changes, and the 4th lens group is for focusing, and focal length can change between 13.5mm-1020mm, and zoom ratio reaches
75 times or more, change between 28 ° to 0.4 ° of shooting angle level, shooting distance is suitble to use in a variety of contexts recently to 1m；
2, the present invention can reach the resolution ratio higher than 5M (5,000,000 pixel of pixel), be with the 1/1.8 " of 8.9mm CCD
Example, it is high higher than 250lp/mm, periphery 0.8H (80% diagonal positions) position resolution that the present invention can reach center resolution
In 160lp/mm.
3, the 11st lens of optical system of the present invention can be moved in perpendicular, and camera lens is shaken at focal length end
When, image planes can be compensated, at focal length 600mm, the amount of movement of the 11st lens 0.25mm, the offset amount of picture is
0.255mm basically reaches 1:1 compensating proportion, and have the airspace more than 7mm after the 11st lens, to stabilization component
Installation reserves Maximum Space, plays the effectiveness of stabilization to greatest extent；
4, it is infrared confocal to realize short focus end for present system, in visible wavelength section 430nm-650nm and infrared wavelength section
830nm-870nm can reach imaging clearly simultaneously, and multi-wavelength light source big in field range there are in the environment of entirely at
As picture is clear；
5, whole system many places of the present invention are used cooperatively and aspherical using simple lens and balsaming lens, are not only eliminated
The aberration of whole system also balances the aberration of whole system well；
6, certain vignetting is arranged in the present invention, in the case where not influencing illumination, moreover it is possible to block periphery spurious rays, make picture
While face center resolution is high, also there is very high resolution ratio at edge.
7, two pieces of cemented doublets are used continuously in the third lens group of the invention, greatly eliminate camera lens aberration so that camera lens
In the case of infrared confocal, the shortwaves aberrations such as purple boundary are eliminated.
【Description of the drawings】
The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the structural diagram of the present invention.
【Specific implementation mode】
It elaborates below in conjunction with the accompanying drawings to embodiments of the present invention.
As shown in Figure 1, high-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end, from object plane to image planes
It is disposed with：
Can opposite fixed first lens group 1 of image planes, the focal length of the first lens group 1 be just, the first lens group 1 include from
The first lens 101 that object plane to image planes are set gradually, the second lens 102, the third lens 103, the 4th lens 104, the 5th lens
105 and the 6th lens 106；
The second lens group 2 that the opposite image planes of energy are moved forward and backward, the focal length of the second lens group 2 is negative, and the second lens group 2 includes
There are the 7th lens 201, the 8th lens 202, the 9th lens 203 and the tenth lens 204 set gradually from object plane to image planes；
Diaphragm 6；Before diaphragm 6 is fixed on the third lens group 3, become according in different focal lengths and environment lower relative aperture size
Change；
Can the opposite fixed the third lens group 3 of image planes, the focal length of the third lens group 3 be just, the third lens group 3 include from
The 11st lens 301, the 12nd lens 302, the 13rd lens 303,304 and of the 14th lens that object plane to image planes are set gradually
15th lens 305；
The 4th lens group 4 that the opposite image planes of energy are moved forward and backward, the focal length of the 4th lens group 4 are just that the 4th lens group 4 includes
There are the 16th lens 401, the 17th lens 402 and the 18th lens 403 set gradually from object plane to image planes；
Sensitive chip 5.
This optical system is made of 18 pieces of eyeglasses, wherein 14 pieces of glass spheric glasses and 4 pieces of Glass aspheric eyeglasses.
As shown in Figure 1, in the present embodiment, 101 focal length of the first lens is negative, and the first lens 101 are falcate knot
Structure, and concave surface is towards 5 direction of sensitive chip；The focal length of second lens 102 is just that two faces of the second lens 102 are convex surface,
The focal length of the third lens 103 is that just, the third lens 103 are falcate structure, and the focal length of the 4th lens 104 is just the 4th lens
104 be falcate structure, and the focal lengths of the 5th lens 105 be negative, and the 5th lens 105 are falcate structure, and concave surface is towards photosensitive
The focal length in 5 direction of chip, the 6th lens 106 is that just, the 6th lens 106 are curved month type structure；First lens 101 with it is described
Second lens 102 are bonded by optical glue, and the 5th lens 105 are bonded with the 6th lens 106 by optical glue,
Adhesive surface bends towards diaphragm, and spherical aberration and the sine that can correct high power position are poor.
As shown in Figure 1, in the present embodiment, the focal length of the 7th lens 201 is negative, and it is curved month type structure, the 8th lens
202 focal length is negative, and is curved month type structure, and the focal length of the 9th lens 203 is negative, and two faces of the 9th lens 203 are
Concave surface, the focal lengths of the tenth lens 204 are that just, and two faces of the tenth lens are convex surface；9th lens 203 and described the
Ten lens 204 are bonded by optical glue.
As shown in Figure 1, in the present embodiment, the focal lengths of the 11st lens 301 is just and two of the 11st lens 301
Face is convex surface；The focal length of 12nd lens 302 is just that and two faces of the 12nd lens 302 are convex surface, the 13rd lens
303 focal length is negative, and the focal length of the 14th lens 304 is just that the focal length of the 15th lens 305 is negative；12nd lens
302 are bonded with the 13rd lens 303 by optical glue, and the 14th lens 304 and the 15th lens 305 pass through light
Learn glue bonding.
As shown in Figure 1, in the present embodiment, the focal length of the 16th lens 401 is just that the focal length of the 17th lens 402 is
Negative, the focal length of the 18th lens 403 is just；16th lens 401 and the 17th lens 402 are viscous by optical glue
It closes.
As shown in Figure 1, in the present embodiment, first lens 101, the second lens 102, the third lens the 103, the 4th
Lens 104, the 5th lens 105, the 6th lens 106, the 9th lens 203, the tenth lens 204, the 12nd lens the 302, the 13rd
Lens 303, the 14th lens 304, the 15th lens 305, the 16th lens 401 and the 17th lens 402 are glass spherical surface
Lens, the 7th lens 201, the 8th lens 202, the 11st lens 301 and the 18th lens 403 are Glass aspheric
Lens.
As shown in Figure 1, in the present embodiment, the 7th lens 201, the 8th lens 202,301 and of the 11st lens
The aspherical surface shape of 18th lens 403 meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and r is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient, α1To α8The coefficient corresponding to each radial coordinate is indicated respectively；When k-factor is less than -1, thoroughly
The face shape curve of mirror is hyperbola；When k-factor is equal to -1, the face shape curve of lens is parabola；When k-factor is between -1 to 0
Between when, the face shape curves of lens is ellipse, and when k-factor is equal to 0, the face shape curve of lens is circle, when k-factor is more than 0
When, the face shape curve of lens is oblateness.
As shown in Figure 1, in the present embodiment, the moving range of the 2 opposite sensitive chip 5 of the second lens group is 0~
The moving range of 145mm, the 4 opposite sensitive chip 5 of the 4th lens group are 0~66mm, the diaphragm 6 and sensitive chip
5 distance is 50mm, and first lens group 1 is 143mm at a distance from the third lens group 3.
The actual design case of the zoom is set forth below：
| Face sequence | α2 | α3 | α4 | α5 | α6 | α7 | α8 |
| 11 | -1.062E+01 | -4.912E-06 | 7.288E-09 | 0 | 0 | 0 | 0 |
| 12 | -7.791E-01 | -7.501E-06 | 8.977E-09 | 0 | 0 | 0 | 0 |
| 13 | -1.222E+00 | 2.671E-05 | -2.017E-07 | 0 | 0 | 0 | 0 |
| 14 | -2.562E+00 | 6.470E-05 | -1.201E-07 | 0 | 0 | 0 | 0 |
| 18 | 1.614E+00 | -4.326E-05 | 3.137E-07 | 0 | 0 | 0 | 0 |
| 19 | -4.147E-01 | -2.826E-05 | 2.421E-07 | 0 | 0 | 0 | 0 |
| 29 | -3.025E+00 | 2.338E-06 | 4.191E-09 | 0 | 0 | 0 | 0 |
| 30 | -2.870E+00 | -2.834E-07 | 4.995E-09 | 0 | 0 | 0 | 0 |
Zoom moving range between lens group：
The moving range of second lens group is 145mm；
The moving range of 4th lens group is 64.0mm；
The distance between diaphragm and sensitive chip are 145.6mm；
The distance of first lens group and the third lens group is 173.5mm.
The zoom lens of the present invention has used 4 lens groups, as the second lens group is in the first lens group, the third lens group
Between be moved forward and backward, focal length changes, and for focusing, focal length can change the 4th lens group between 13.5mm-1020mm, become
Burnt multiplying power reaches 75 times or more, changes between 28 ° to 0.4 ° of shooting angle level, shooting distance to 1m, is suitble to a variety of recently
It is used under environment；
The present invention can reach the resolution ratio higher than 5M (5,000,000 pixel of pixel), by taking the 1/1.8 " of 8.9mm CCD as an example,
The present invention can reach center resolution and be higher than higher than 250lp/mm, periphery 0.8H (80% diagonal positions) position resolution
160lp/mm。
11st lens of optical system of the present invention can be moved in perpendicular, camera lens when focal length end is shaken,
Image planes can be compensated, at focal length 600mm, the amount of movement of the 11st lens 0.25mm, the offset amount of picture is
0.255mm basically reaches 1:1 compensating proportion, and the airspace after the 11st lens can maximum reserve 7mm, give stabilization
The installation of component reserves Maximum Space, plays the effectiveness of stabilization to greatest extent；
The entire camera lens of the present invention using the first lens group as peak, the distance of the first lens group and image plane be it is fixed,
Its maximum height is less than 360mm；
It is infrared confocal that present system realizes short focus end, in visible wavelength section 430nm-650nm and infrared wavelength section
830nm-870nm can reach imaging clearly simultaneously, and multi-wavelength light source big in field range there are in the environment of entirely at
As picture is clear；
Whole system many places of the present invention are used cooperatively and aspherical using simple lens and balsaming lens, are not only eliminated whole
The aberration of a system also balances the aberration of whole system well；
Certain vignetting is arranged in the present invention, in the case where not influencing illumination, moreover it is possible to block periphery spurious rays, make image planes
While center resolution is high, also there is very high resolution ratio at edge.
Two pieces of cemented doublets are used continuously in the third lens group of the present invention, greatly eliminate camera lens aberration so that camera lens exists
It is infrared it is confocal in the case of, eliminate the shortwaves aberration such as purple boundary.
Claims (8)
1. high-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end, which is characterized in that from object plane to image planes according to
It is secondary to be provided with：
Can fixed first lens group (1) of image planes, the focal length of the first lens group (1) be relatively just that the first lens group (1) includes
The first lens (101), the second lens (102), the third lens (103), the 4th lens set gradually from object plane to image planes
(104), the 5th lens (105) and the 6th lens (106)；
The focal length of the second lens group (2) that the opposite image planes of energy are moved forward and backward, the second lens group (2) is negative, the second lens group (2) packet
Include the 7th lens (201), the 8th lens (202), the 9th lens (203) and the tenth lens set gradually from object plane to image planes
(204)；
Diaphragm (6)；
Can the fixed the third lens group (3) of image planes, the focal length of the third lens group (3) be relatively just that the third lens group (3) includes
The 11st lens (301) that are set gradually from object plane to image planes, the 12nd lens (302), the 13rd lens (303), the 14th
Lens (304) and the 15th lens (305)；
The focal length of the 4th lens group (4) that the opposite image planes of energy are moved forward and backward, the 4th lens group (4) is just the 4th lens group (4) packet
Include the 16th lens (401), the 17th lens (402) and the 18th lens (403) set gradually from object plane to image planes；
Sensitive chip (5).
2. high-resolution according to claim 1, big image planes, big multiplying power, the infrared confocal optical system in short focus end, feature
It is, the first lens (101) focal length is negative, and the first lens (101) are falcate structure, and concave surface is towards sensitive chip
(5) direction；The focal length of second lens (102) is just that two faces of the second lens (102) are convex surface, the third lens (103)
Focal length is that just, the third lens (103) are falcate structure, and the focal length of the 4th lens (104) is that just, the 4th lens (104) are curved
Month shape structure, the focal lengths of the 5th lens (105) be negative, and the 5th lens (105) are falcate structure, and concave surface is towards sensitive chip
(5) focal length in direction, the 6th lens (106) is that just, the 6th lens (106) are curved month type structure；First lens (101) with
Second lens (102) are bonded by optical glue, and the 5th lens (105) pass through light with the 6th lens (106)
Learn glue bonding.
3. high-resolution according to claim 1, big image planes, big multiplying power, the infrared confocal optical system in short focus end, feature
It is, the focal length of the 7th lens (201) is negative, and is curved month type structure, and the focal length of the 8th lens (202) is negative, and is bent moon
The focal length of type structure, the 9th lens (203) is negative, and two faces of the 9th lens (203) are concave surface, the tenth lens (204)
Focal length be just that and two faces of the tenth lens are convex surface；9th lens (203) are logical with the tenth lens (204)
Cross optical glue bonding.
4. high-resolution according to claim 1, big image planes, big multiplying power, the infrared confocal optical system in short focus end, feature
It is, the focal lengths of the 11st lens (301) is that just, and two faces of the 11st lens (301) are convex surface；12nd lens
(302) focal length is just that and two faces of the 12nd lens (302) are convex surface, the focal lengths of the 13rd lens (303) be it is negative,
The focal length of 14th lens (304) is just that the focal length of the 15th lens (305) is negative；12nd lens (302) with it is described
13rd lens (303) are bonded by optical glue, and the 14th lens (304) pass through optics with the 15th lens (305)
Glue bonds.
5. high-resolution according to claim 1, big image planes, big multiplying power, the infrared confocal optical system in short focus end, feature
It is, the focal length of the 16th lens (401) is just that the focal length of the 17th lens (402) is negative, the 18th lens (403)
Focal length be just；16th lens (401) are bonded with the 17th lens (402) by optical glue.
6. high-resolution according to claim 1, big image planes, big multiplying power, the infrared confocal optical system in short focus end, feature
It is, first lens (101), the second lens (102), the third lens (103), the 4th lens (104), the 5th lens
(105), the 6th lens (106), the 9th lens (203), the tenth lens (204), the 12nd lens (302), the 13rd lens
(303), the 14th lens (304), the 15th lens (305), the 16th lens (401) and the 17th lens (402) are glass
Glass spherical lens, the 7th lens (201), the 8th lens (202), the 11st lens (301) and the 18th lens (403)
It is glass aspheric lenses.
7. high-resolution according to claim 6, big image planes, big multiplying power, the infrared confocal optical system in short focus end, feature
Be, the 7th lens (201), the 8th lens (202), the 11st lens (301) and the 18th lens (403) aspheric
Face surface shape meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, its unit is identical with length of lens unit for radial coordinate by r, k
For circular cone whose conic coefficient, α1To α8The coefficient corresponding to each radial coordinate is indicated respectively；When k-factor is less than -1, lens
Face shape curve is hyperbola；When k-factor is equal to -1, the face shape curve of lens is parabola；When k-factor is between -1 to 0
When, the face shape curve of lens is ellipse, and when k-factor is equal to 0, the face shape curve of lens is circle, when k-factor is more than 0, thoroughly
The face shape curve of mirror is oblateness.
8. high-resolution according to claim 1, big image planes, big multiplying power, the infrared confocal optical system in short focus end, feature
It is, second lens group (2) is 0~145mm, the 4th lens group with respect to the moving range of sensitive chip (5)
(4) moving range of opposite sensitive chip (5) is 0~66mm, and the diaphragm (6) is 50mm at a distance from sensitive chip (5),
First lens group (1) is 143mm at a distance from the third lens group (3).
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| CN201810499710.1A CN108459403A (en) | 2018-05-23 | 2018-05-23 | High-resolution, big image planes, big multiplying power, the infrared confocal optical system in short focus end |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082893A (en) * | 2019-04-28 | 2019-08-02 | 秦皇岛视听机械研究所有限公司 | A kind of pearl eye projection lens structure suitable for 4K resolution ratio 3DMD technology projector |
| CN111123494A (en) * | 2019-12-03 | 2020-05-08 | 宁波永新光学股份有限公司 | Optical system of high zoom ratio continuous zooming stereomicroscope |
-
2018
- 2018-05-23 CN CN201810499710.1A patent/CN108459403A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082893A (en) * | 2019-04-28 | 2019-08-02 | 秦皇岛视听机械研究所有限公司 | A kind of pearl eye projection lens structure suitable for 4K resolution ratio 3DMD technology projector |
| CN110082893B (en) * | 2019-04-28 | 2021-02-09 | 秦皇岛视听机械研究所有限公司 | Fisheye projection lens structure suitable for 4K resolution 3DMD technology projector |
| CN111123494A (en) * | 2019-12-03 | 2020-05-08 | 宁波永新光学股份有限公司 | Optical system of high zoom ratio continuous zooming stereomicroscope |
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