CN208477195U - Minimize the high definition varifocal optical system of big target surface - Google Patents
Minimize the high definition varifocal optical system of big target surface Download PDFInfo
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- CN208477195U CN208477195U CN201821111729.6U CN201821111729U CN208477195U CN 208477195 U CN208477195 U CN 208477195U CN 201821111729 U CN201821111729 U CN 201821111729U CN 208477195 U CN208477195 U CN 208477195U
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Abstract
A kind of high definition varifocal optical system minimizing big target surface, direction successively includes: the fixation lens group with positive light coke from the object side to image side, preceding zoom lens group with negative power, aperture diaphragm, middle zoom lens group with positive light coke, condenser lens group with positive light coke, rear zoom lens group and imaging surface with positive light coke, preceding zoom lens group integrally moves from object side to image side along optical axis and middle zoom lens group moves along optical axis from image side to object side, zoom lens group moves along optical axis from object side to image side afterwards, and realize the zoom from wide-angle side to telescope end, by moving the condenser lens group along optical axis, it corrects zoom process and object distance variation bring is empty burnt, the utility model reaches biggish imaging diameter under minimum volume, be provided simultaneously with higher zoom ratio and 4K high definition resolving power is horizontal, has been compatible with infrared confocal function, to use various modes under low photograph environment, has good effect.
Description
Technical field
The utility model relates to a kind of optical system applied in protection and monitor field, specifically a kind of telescope end is burnt
Away from reaching 1.75 or more with overall length ratio, diameter is imaged and overall length ratio reaches 0.07 or more, has extremely low according to shooting ability
High zoom ratio, 4K high definition zoom lens.
Background technique
Round-the-clock monitoring camera generally uses infrared imagery technique, expands lens aperture or increases target surface and pixel spot size
Technological means ensure the low picture quality according under environment, but infrared imagery technique can lose the colouring information of scenery, road
Use demand is unable to satisfy under the scene that the picture colors such as monitoring require；Varifocal mirror can not be then suitable for by expanding lens aperture
Head, the aperture expansion of full multiplying power will lead to lens performance loss from wide-angle side to telescope end, design difficulty rises；Increase target surface with
Requirement of the pixel size technologies then to imaging surface size and optical lens imaging diameter is very strict.
Utility model content
The utility model is in view of the drawbacks of the prior art and insufficient, proposes a kind of high definition Zoom optical for minimizing big target surface
System reaches biggish imaging diameter under minimum volume, is provided simultaneously with higher zoom ratio and 4K high definition resolving power
Level has been compatible with infrared confocal function, to use various modes under low photograph environment, has good effect.
The utility model is achieved through the following technical solutions:
Direction successively includes: fixation lens group with positive light coke, has negative light the utility model from the object side to image side
Preceding zoom lens group, aperture diaphragm, the middle zoom lens group with positive light coke, the condenser lens with positive light coke of focal power
Group, the rear zoom lens group with positive light coke and imaging surface, in which: preceding zoom lens group it is whole along optical axis from object side
Mobile to image side, while middle zoom lens group moves along optical axis from image side to object side, rear zoom lens group is along optical axis from object
Side is mobile to image side, and realizes the zoom from wide-angle side to telescope end, by moving the condenser lens group along optical axis
It is dynamic, it corrects zoom process and object distance variation bring is empty burnt.
Optical filter and the guarantor of the light and stray light for filtering out unnecessary wave band are preferable configured with before the imaging surface
Protect glass.
The imaging surface is equipped with the solid-state imagers such as CCD and CMOS.
The fixation lens group includes: the gluing of the lens with negative power and the lens composition with positive light coke
The lens of lens and at least two pieces with positive light coke, in which: balsaming lens is to guarantee extension and the light of telescope end focal length
The stabilization of tendency, the lens with positive light coke have used anomalous dispersion glass, have restrained the infrared color difference of telescope end.
The preceding zoom lens group includes: that two pieces of lens with negative power and one piece are saturating with positive light coke
Mirror, so that zoom of the camera lens from wide-angle side to telescope end.
Described two pieces have a lens of negative power, before the recessed lens of preferably one piece of convex rear surface of front surface and one piece
Rear surface is recessed lens.
After the lens of the positive light coke, the lens with negative power are preferably placed, the change of camera lens can be promoted
Burnt multiplying power.
Lens with positive light coke in the preceding zoom lens group, it is preferable to use high Abbe number material is made, from
And guarantee that the off-axis chromatic aberration of telescope end will not be excessive.
Lens in the preceding zoom lens group are preferably all made of aspherical shape, so as to improve the intelligent of camera lens telescope end
Difference.
The middle zoom lens group includes: at least two pieces lens with positive light coke and with the saturating of positive light coke
The balsaming lens of mirror and the lens composition with negative power.
Lens in the middle zoom lens group with positive light coke preferably use anomalous dispersion glass to restrain wide-angle
All kinds of color difference at end further preferably improve the coma of camera lens wide-angle side using aspherical mirror.
The condenser lens group includes: the lens with positive light coke and the lens with negative power.
It is preferable to use aspherical to improve camera lens wide-angle side for lens in the condenser lens group with positive light coke
Coma.
The rear zoom lens group includes: that lens with negative power and at least one piece are saturating with positive light coke
Mirror is imaged so that effectively further light is converged after effective imaging diameter of promotion camera lens.
It is recessed lens that lens in the rear zoom lens group with negative power, which are preferably front and rear surfaces,.
The bore of the aperture diaphragm is correspondingly zoomed in or out with lens ratio.
The high definition varifocal optical system, overall structure further satisfaction: Wherein: ftFor camera lens telescope end focal length, TTL be camera lens optical full length, Y be camera lens at
As diameter, FOVwIt is camera lens in the maximum field of view angle of wide-angle side, FOVtIt is camera lens at the maximum field of view angle of telescope end.
The fixation lens group, overall structure further meet the following conditions simultaneously:
a)Wherein:For the rear surface effective diameter of lens group, FnotIt is looking in the distance for camera lens
The aperture bore at end, LS1R-IMGTo fix the rear surface of last piece of eyeglass of lens group to the distance of imaging surface；
b)Wherein: Vds1mFor the Abbe of the lens in balsaming lens with negative power
Number, Vds1pFor the Abbe number of the lens in balsaming lens with positive light coke, Nds1mTo have negative power in balsaming lens
The refractive index of lens, Nds1pFor the refractive index of the lens in balsaming lens with positive light coke；
The preceding zoom lens group, overall structure further meet the following conditions simultaneously:
a)Wherein: ftFocal length for camera lens in telescope end, fwFor camera lens wide-angle side focal length,
Lt-wThe distance moved from telescope end into wide-angle side change procedure for preceding zoom lens group；
b)Wherein: fs2l1For the focal length of first piece of lens in preceding zoom lens group, fs2l2/3
For the sum of the focal length of second piece of lens and third piece lens in preceding zoom lens group, fs2l4Thoroughly for the 4th piece in preceding zoom lens group
The focal length of mirror, value is 0 if structure is without the 4th piece of lens；
c)Wherein: Vds2mThere is negative power for second piece in preceding zoom lens group
The Abbe number of lens, Vds2pFor the Abbe number of the lens in preceding zoom lens group with positive light coke, Nds2mFor preceding zoom lens
The refractive index of lens in group in second piece with negative power, Nds2pIt is saturating with positive light coke in preceding zoom lens group
The refractive index of mirror.
The middle zoom lens group, overall structure further meet the following conditions simultaneously:
a)Wherein:Front surface for first piece of eyeglass of middle zoom lens group is effective
Diameter, FnowAperture bore for whole camera lens in wide-angle side, LS3F-STPFront surface for first piece of eyeglass of middle zoom lens group arrives
The distance of aperture diaphragm STP；
b)Wherein: Vds3l1For the refractive index of first piece of lens in middle zoom lens group,
fs3l1For the focal length of first piece of lens in middle zoom lens group, Vds3l2For the refraction of second piece of lens in middle zoom lens group
Rate, fs3l2For the focal length of second piece of lens in middle zoom lens group.
The condenser lens group, overall structure further satisfaction:Wherein:To focus
The front surface effective diameter of first piece of eyeglass of lens group, fS4For the whole focal length of condenser lens group.
The rear zoom lens group, overall structure further meet the following conditions simultaneously:
a)Wherein: Y is the imaging diameter of camera lens, fS5For the whole focal length of rear zoom lens group；
b)Nds5l1> 1.90, in which: Nds5l1 is the refractive index of first piece of lens in rear zoom lens group；
c)Wherein: fs5p is the whole burnt of the lens in rear zoom lens group with positive light coke
Away from fs5m is the focal length of the lens in rear zoom lens group with negative power.
Technical effect
Compared with prior art, the utility model optical system is in extremely short length, at the same meet big zoom ratio with
Big imaging diameter, wherein telescope end focal length and overall length ratio reach 1.75 or more, be imaged diameter and overall length ratio reach 0.07 with
On；And the utility model under conditions of ambient lighting only has 0.0001lux also to be imaged, and image detail is abundant, picture
Bright in luster, sharpness is high.
Detailed description of the invention
Fig. 1 is changing along the sectional view of optical axis and from wide-angle side to telescope end for the composition of the zoom lens of embodiment 1
The moving direction of each group in the process；
Fig. 2 is each aberration diagram of the wide-angle side of the zoom lens of embodiment 1 relative to d line；
Fig. 3 is each aberration diagram of the telescope end of the zoom lens of embodiment 1 relative to d line；
Fig. 4 is changing along the sectional view of optical axis and from wide-angle side to telescope end for the composition of the zoom lens of embodiment 2
The moving direction of each group in the process；
Fig. 5 is each aberration diagram of the wide-angle side of the zoom lens of embodiment 2 relative to d line；
Fig. 6 is each aberration diagram of the telescope end of the zoom lens of embodiment 2 relative to d line；
Fig. 7 is changing along the sectional view of optical axis and from wide-angle side to telescope end for the composition of the zoom lens of embodiment 3
The moving direction of each group in the process；
Fig. 8 is each aberration diagram of the wide-angle side of the zoom lens of embodiment 3 relative to d line；
Fig. 9 is each aberration diagram of the telescope end of the zoom lens of embodiment 3 relative to d line；
In figure: fixed lens group G1, preceding zoom lens group G2, aperture diaphragm STP, middle zoom lens group G3, condenser lens
Group G4, rear zoom lens group G5, imaging surface IMG, L1~L18 are the first to the 18th lens, optical filter IRCF, protection glass
CG。
Specific embodiment
Embodiment 1
As shown in Figure 1, direction successively includes: the fixation with positive light coke to the present embodiment optical system from the object side to image side
Lens group G1, the preceding zoom lens group G2 with negative power, aperture diaphragm STP, the middle zoom lens group with positive light coke
G3, the condenser lens group G4 with positive light coke, rear zoom lens group G5 and imaging surface IMG with positive light coke, in which:
Preceding zoom lens group G2 is integrally moved along optical axis from object side to image side, at the same middle zoom lens group G3 along optical axis from image side
Mobile to object side, rear zoom lens group G5 is moved along optical axis from object side to image side, and is realized from wide-angle side to telescope end
Zoom corrects zoom process and object distance variation bring is empty burnt by moving the condenser lens group G4 along optical axis.
The optical filter of the light and stray light for filtering out unnecessary wave band is preferable configured with before the imaging surface IMG
IRCF。
The imaging surface IMG is equipped with the solid-state imager of CCD and CMOS etc..
The fixation lens group G1 includes: recessed the first lens L1 with positive light coke of the convex rear surface of front surface, preceding
The recessed third with positive light coke of recessed the second lens L2 with negative power of the convex rear surface in surface, the convex rear surface of front surface
Recessed the 4th lens L4 with positive light coke of the convex rear surface of lens L3, front surface, in which: the second lens with negative power
L2 and the third lens L3 phase with positive light coke are glued.
The preceding zoom lens group G2 include: recessed the 5th lens L5 with negative power of the convex rear surface of front surface,
Convex the 7th lens L7 with positive light coke of recessed the 6th lens L6 with negative power of front and rear surfaces, front and rear surfaces
Recessed the 8th lens L8 with negative power with front and rear surfaces, in which: there is the 6th lens L6 of negative power and have
7th lens L7 phase of positive light coke is glued, and the 8th lens L8 with negative power is double-sized non-spherical structure.
The middle zoom lens group G3 includes: convex the 9th lens L9, the preceding table with positive light coke of front and rear surfaces
The 11st convex with positive light coke of recessed the tenth lens L10 with positive light coke of the convex rear surface in face, front and rear surfaces is saturating
Mirror L11 and recessed the 12nd lens L12 with negative power of front and rear surfaces, in which: with positive light coke the 11st thoroughly
Mirror L11 and the 12nd lens L12 phase with negative power are glued.
The condenser lens group G4 includes: convex the 13rd lens L13 with positive light coke of front and rear surfaces with before
Convex the 14th lens L14 with negative power of surface concave rear surface, in which: the 13rd lens L13 with positive light coke
For double-sized non-spherical structure.
The rear zoom lens group G5 includes: recessed the 15th lens L15 with negative power of front and rear surfaces, preceding
Surface concave rear surface convex the 16th lens L16 with positive light coke and front surface concave rear surface it is convex with positive light coke
17th lens L17, in which: the 16th lens with positive light coke are double-sized non-spherical structure.
The aperture diaphragm STP, as lens ratio changes, bore can be matched, amplified accordingly or
It reduces.
Table 1 is the basic optical parameter of the zoom lens of embodiment 1.
| Lens parameters | W | M | T |
| f | 16.50 | 100.00 | 275.00 |
| Fno | 1.58 | 3.84 | 5.24 |
| Y | 20.40 | 20.40 | 20.40 |
Table 2 is the structured data of the zoom lens of embodiment 1.
Table 3 is the zoom data of the zoom lens of embodiment 1.
| Surface serial number | W | M | T |
| s7 | 0.91 | 32.83 | 37.10 |
| s14 | 31.63 | 12.22 | 1.02 |
| s22 | 9.08 | 5.16 | 27.63 |
| s26 | 1.32 | 8.92 | 1.64 |
| s32 | 27.50 | 11.36 | 3.10 |
Table 4 is the asphericity coefficient of the zoom lens of embodiment 1.
| Surface serial number | K | A4 | A6 | A8 | A10 |
| s13 | -7.61E+00 | -1.91E-05 | -4.90E-07 | 9.17E-09 | -9.40E-11 |
| s14 | 9.90E+01 | 2.51E-05 | -6.50E-07 | 9.07E-09 | -8.18E-11 |
| s23 | 9.99E-01 | -2.33E-05 | 4.12E-08 | -8.83E-10 | -2.42E-11 |
| s24 | -4.12E-01 | 5.46E-06 | 1.50E-07 | -4.06E-09 | 2.66E-11 |
| s29 | 9.90E+01 | -1.30E-05 | 1.30E-08 | -1.47E-10 | 2.79E-13 |
| s30 | 5.68E-02 | -3.84E-06 | -1.46E-08 | -2.30E-11 | -1.85E-13 |
The following structure feature of high definition varifocal optical system further satisfaction in embodiment 1:
Nds5l1=2.00；
Embodiment 2
As shown in figure 4, the difference of the present embodiment high definition varifocal optical system compared with Example 1 is, in the present embodiment:
Preceding zoom lens group G2 includes: two pieces of lens with negative power, i.e. the 5th lens G5 and the 6th lens G6 with
And one piece of lens with negative power, i.e. the 7th lens L7, the 7th lens L7 are double-sized non-spherical structure.
Middle zoom lens group G3 includes: two pieces of lens with positive light coke, i.e. the 8th lens L8 and the 9th lens L9, one
Piece with the lens with negative power, i.e. the tenth lens L10 and the lens with positive light coke and with negative power
The balsaming lens of lens composition, i.e. the 11st lens L11 and the 12nd lens L12, in which: the 9th lens with positive light coke
L9 and the tenth has lens L10 phase of negative power glued, the 11st lens L11 with positive light coke and with negative power
The 12nd lens L12 phase it is glued.
The 8th lens L8 is the convex lens of front and rear surfaces, and the 9th lens L9 is that front and rear surfaces are convex
Lens, the tenth lens L10 are the recessed lens of front and rear surfaces, and the 11st lens L11 is table after front surface is convex
The recessed lens in face, the 12nd lens L12 are the recessed lens of the convex rear surface of front surface.
The 16th lens L16 in zoom lens group G5 is the convex lens of front and rear surfaces afterwards.
Table 5 is the basic optical parameter of the zoom lens of embodiment 2.
| Lens parameters | W | M | T |
| f | 17.00 | 125.00 | 300.00 |
| Fno | 1.76 | 3.97 | 5.04 |
| Y | 20.40 | 20.40 | 20.40 |
Table 6 is the structured data of the zoom lens of embodiment 2.
Table 7 is the zoom data of the zoom lens of embodiment 2.
| Surface serial number | W | M | T |
| s7 | 0.70 | 35.30 | 42.90 |
| s13 | 39.07 | 10.94 | 1.31 |
| s22 | 4.25 | 5.91 | 24.59 |
| s26 | 1.41 | 14.29 | 2.19 |
| s30 | 28.64 | 7.64 | 3.10 |
Table 8 is the asphericity coefficient of the zoom lens of embodiment 2.
| Surface serial number | K | A4 | A6 | A8 | A10 |
| s12 | 2.19E-01 | -2.59E-05 | 3.72E-08 | 5.09E-09 | -1.07E-10 |
| s13 | -9.90E+01 | -2.73E-05 | 1.24E-08 | 5.91E-09 | -1.17E-10 |
| s23 | 1.21E+00 | -2.38E-05 | 1.03E-07 | -3.87E-09 | 5.65E-11 |
| s24 | -4.90E-01 | 8.07E-06 | 3.96E-08 | -9.94E-10 | 2.56E-12 |
| s29 | 9.90E+01 | -1.79E-05 | 3.85E-08 | -1.99E-10 | -1.08E-12 |
| s30 | 3.20E-01 | -7.49E-06 | -3.71E-09 | -1.62E-10 | -6.45E-13 |
The following structure feature of high definition varifocal optical system further satisfaction in embodiment 2:
Nds5l1=2.00；
Embodiment 3
As shown in fig. 7, the difference of the present embodiment high definition varifocal optical system compared with Example 1 is, in the present embodiment:
The first lens L1 in fixed lens group G1 is the recessed lens with negative power of the convex rear surface of front surface, second
Lens L2 is the convex lens with positive light coke of front and rear surfaces, and the first lens L1 and the second lens L2 phase are glued.
Middle zoom lens group G3 includes: the lens with positive light coke, i.e. the 9th lens L9, the lens with positive light coke
With the balsaming lens of the lens composition with negative power, i.e. the 10th lens L10 and the 11st lens L11, there is positive light focus
The lens of degree, i.e. the 12nd lens L12 and the lens with negative power, i.e. the 13rd lens L13.
The 9th lens L9 is the convex lens with positive light coke of front and rear surfaces, the tenth lens L10
For the convex lens with positive light coke of front and rear surfaces, the 11st lens L11 is the convex tool of front surface concave rear surface
There are a lens of positive light coke, the 12nd lens are the convex lens with positive light coke of front and rear surfaces, described the
13 lens L13 are the recessed lens with negative power of front and rear surfaces.
Condenser lens group G4 include: the gluing of lens with negative power and the composition of the lens with positive light coke thoroughly
Mirror, i.e. the 14th lens L14 and the 15th lens L15.
The 14th lens L14 is the recessed non-spherical lens of the convex rear surface of front surface.
The 15th lens L15 is the convex non-spherical lens of front and rear surfaces.
Zoom lens group G5 includes: the lens with negative power afterwards, i.e. the 16th lens L16, with positive light coke
Lens, i.e. the 17th lens L17 and the lens with positive light coke, i.e. the 18th lens L18.
The 16th lens L16 is the recessed double surface non-spherical lens of front and rear surfaces.
The 17th lens L17 is the convex lens of front and rear surfaces.
The 18th lens L18 is the convex lens of front surface concave rear surface.
Table 9 is the basic optical parameter of the zoom lens of embodiment 3.
| Lens parameters | W | M | T |
| f | 15.00 | 110.00 | 300.00 |
| Fno | 1.79 | 4.04 | 5.90 |
| Y | 20.40 | 20.40 | 20.40 |
Table 10 is the structured data of the zoom lens of embodiment 3.
Table 11 is the zoom data of the zoom lens of embodiment 3.
Table 12 is the asphericity coefficient of the zoom lens of embodiment 3.
| Surface serial number | K | A4 | A6 | A8 | A10 |
| s13 | 3.79E+01 | -1.77E+01 | 1.57E+00 | 9.74E+01 | 2.28E-02 |
| s14 | -2.79E-05 | -2.01E-05 | -1.94E-05 | -1.79E-05 | -7.90E-06 |
| s27 | 3.32E-09 | -1.57E-08 | 1.02E-07 | 4.36E-08 | 1.49E-09 |
| s30 | 6.40E-09 | 6.37E-09 | -3.78E-09 | -8.06E-11 | 4.85E-11 |
| s31 | -1.12E-10 | -1.14E-10 | 5.97E-11 | -6.99E-13 | -7.91E-13 |
The following structure feature of high definition varifocal optical system further satisfaction in embodiment 3:
Nds5l1=1.90；
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the utility model principle and objective with
Different modes carries out local directed complete set to it, and the protection scope of the utility model is subject to claims and not by above-mentioned specific
Implementation is limited, and each implementation within its scope is by the constraint of the utility model.
Claims (12)
1. a kind of high definition varifocal optical system for minimizing big target surface, which is characterized in that direction successively includes: from the object side to image side
Fixation lens group with positive light coke, the preceding zoom lens group with negative power, aperture diaphragm, in positive light coke
Zoom lens group, the condenser lens group with positive light coke, the rear zoom lens group with positive light coke and imaging surface.
2. high definition varifocal optical system according to claim 1, characterized in that the fixation lens group includes: to have
The balsaming lens of the lens of negative power and the lens composition with positive light coke and at least two pieces it is saturating with positive light coke
Mirror, in which: to guarantee the extension of telescope end focal length and the stabilization of light tendency, the lens with positive light coke use balsaming lens
Anomalous dispersion glass, has restrained the infrared color difference of telescope end.
3. high definition varifocal optical system according to claim 1, characterized in that the preceding zoom lens group includes: two
Lens and one piece of lens with positive light coke piece with negative power, before this two pieces lens with negative power are one piece
The recessed lens of the convex rear surface in surface and one piece of front and rear surfaces are recessed lens.
4. high definition varifocal optical system according to claim 3, characterized in that the positive light in the preceding zoom lens group
The lens with negative power are further provided with after the lens of focal power to promote the zoom ratio of camera lens；The preceding zoom lens
Lens in group are all made of aspherical shape, so as to improve the coma of camera lens telescope end.
5. high definition varifocal optical system according to claim 1, characterized in that the middle zoom lens group include: to
The gluing of few two pieces of lens with positive light coke and the lens with positive light coke and the composition of the lens with negative power
Lens；The lens with positive light coke use anomalous dispersion glass to restrain all kinds of color difference of wide-angle side, further make
Improve the coma of camera lens wide-angle side with aspherical mirror.
6. high definition varifocal optical system according to claim 1, characterized in that the condenser lens group includes: to have
For the lens of positive light coke with the lens of negative power, this has the lens of positive light coke wide to improve camera lens using aspherical
The coma at angle end；The rear zoom lens group includes: that lens with negative power and at least one piece have positive light coke
Lens, thus effectively promoted camera lens effective imaging diameter after further light converge be imaged, in which: have negative light focus
The lens of degree are that front and rear surfaces are recessed lens.
7. high definition varifocal optical system according to claim 1, characterized in that the high definition varifocal optical system,
Overall structure further satisfaction:Wherein: ftIt is looking in the distance for camera lens
The focal length at end, TTL are the optical full length of camera lens, and Y is the imaging diameter of camera lens, FOVwFor camera lens wide-angle side maximum field of view
Angle, FOVtIt is camera lens at the maximum field of view angle of telescope end.
8. high definition varifocal optical system according to claim 1 or 2, characterized in that the fixation lens group, entirety
Structure further meets the following conditions simultaneously:
a)Wherein:For the rear surface effective diameter of lens group, FnotIt is camera lens in telescope end
Aperture bore, LS1R-IMGTo fix the rear surface of last piece of eyeglass of lens group to the distance of imaging surface；
b)Wherein: Vds1mTo have the Abbe number of the lens of negative power in balsaming lens,
Vds1pFor the Abbe number of the lens in balsaming lens with positive light coke, Nds1mTo have the lens of negative power in balsaming lens
Refractive index, Nds1pFor the refractive index of the lens in balsaming lens with positive light coke.
9. high definition varifocal optical system described according to claim 1 or 3 or 4, characterized in that the preceding zoom lens group,
Its overall structure further meets the following conditions simultaneously:
a)Wherein: ftFocal length for camera lens in telescope end, fwFocal length for camera lens in wide-angle side, Lt-wFor
The distance that preceding zoom lens group moves from telescope end into wide-angle side change procedure；
b)Wherein: fs2l1For the focal length of first piece of lens in preceding zoom lens group, fs2l2/3It is preceding
The sum of the focal length of second piece of lens and third piece lens, f in zoom lens groups2l4For the 4th piece of lens in preceding zoom lens group
Focal length, value is 0 if structure is without the 4th piece of lens；
c)Wherein: Vds2mFor second piece in the preceding zoom lens group lens with negative power
Abbe number, Vds2pFor the Abbe number of the lens in preceding zoom lens group with positive light coke, Nds2mFor in preceding zoom lens group
The refractive index of lens in second piece with negative power, Nds2pFor the lens in preceding zoom lens group with positive light coke
Refractive index.
10. high definition varifocal optical system according to claim 1 or claim 7, characterized in that the middle zoom lens group,
Overall structure further meets the following conditions simultaneously:
a)Wherein:For the front surface effective diameter of first piece of eyeglass of middle zoom lens group,
FnowAperture bore for whole camera lens in wide-angle side, LS3F-STPFor middle zoom lens group first piece of eyeglass front surface to hole
The distance of diameter diaphragm STP；
b)Wherein: Vds3l1For the refractive index of first piece of lens in middle zoom lens group, fs3l1
For the focal length of first piece of lens in middle zoom lens group, Vds3l2For the refractive index of second piece of lens in middle zoom lens group,
fs3l2For the focal length of second piece of lens in middle zoom lens group.
11. high definition varifocal optical system according to claim 9, characterized in that the condenser lens group, it is whole to tie
Structure further satisfaction:Wherein:For the front surface effective diameter of first piece of eyeglass of condenser lens group,
fS4For the whole focal length of condenser lens group.
12. high definition varifocal optical system according to claim 10, characterized in that the rear zoom lens group, it is whole
Body structure further meets the following conditions simultaneously:
a)Wherein: Y is the imaging diameter of camera lens, fS5For the whole focal length of rear zoom lens group；
b)Nds5l1> 1.90, in which: Nds5l1 is the refractive index of first piece of lens in rear zoom lens group；
c)Wherein: fs5p is the whole focal length of the lens in rear zoom lens group with positive light coke,
Fs5m is the focal length of the lens in rear zoom lens group with negative power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821111729.6U CN208477195U (en) | 2018-07-13 | 2018-07-13 | Minimize the high definition varifocal optical system of big target surface |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231697A (en) * | 2019-06-06 | 2019-09-13 | 中山联合光电科技股份有限公司 | A kind of small distortion pick-up lens of wide-angle |
| CN112305730A (en) * | 2020-10-21 | 2021-02-02 | 舜宇光学(中山)有限公司 | Zoom lens |
| CN114047615A (en) * | 2021-10-27 | 2022-02-15 | 福建福光股份有限公司 | Wide-spectrum 20-time continuous zoom lens |
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2018
- 2018-07-13 CN CN201821111729.6U patent/CN208477195U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231697A (en) * | 2019-06-06 | 2019-09-13 | 中山联合光电科技股份有限公司 | A kind of small distortion pick-up lens of wide-angle |
| CN112305730A (en) * | 2020-10-21 | 2021-02-02 | 舜宇光学(中山)有限公司 | Zoom lens |
| CN114047615A (en) * | 2021-10-27 | 2022-02-15 | 福建福光股份有限公司 | Wide-spectrum 20-time continuous zoom lens |
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