CN207689739U - Interchangeable of dolly-out,ing dolly-back tight shot - Google Patents
Interchangeable of dolly-out,ing dolly-back tight shot Download PDFInfo
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- CN207689739U CN207689739U CN201721591817.6U CN201721591817U CN207689739U CN 207689739 U CN207689739 U CN 207689739U CN 201721591817 U CN201721591817 U CN 201721591817U CN 207689739 U CN207689739 U CN 207689739U
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Abstract
One kind is dolly-out,ed dolly-back interchangeable tight shot, including：The first eyeglass group, diaphragm and the second eyeglass group for focusing and correcting aberration of the field angle for being used to converge light and forming demand set gradually from the object side to image side, wherein：First eyeglass group includes：The first eyeglass with positive light coke, the second eyeglass with positive light coke, the third eyeglass with positive light coke, the 4th eyeglass with negative power；Second eyeglass group includes：The 5th eyeglass with negative power, the 6th lens with positive light coke, with the cemented doublet of positive light coke, i.e. the 8th eyeglass；Diaphragm and the spacing of the second eyeglass group are fixed, to which composition can be along the zoom group that optical axis moves forward and backward.When shooting object from infinity to when short distance variation, the first eyeglass group is fixed, and diaphragm and whole moved from image space to object space of the second eyeglass group are focused.The present apparatus meets the 8k resolution ratio of matching silent frame and super35 picture film cameras, and camera lens whole process in changing object distance focussing process distorts without dark angle, and under each object distance, and small, cell breath is faint, while having superelevation cost performance and machinability.
Description
Technical field
The utility model relates to a kind of technology in optical device field, specifically a kind of interchangeable fixed-focus mirror of dolly-out,ing dolly-back
Head.
Background technology
Cinema scene is made to measure specifically for video captures such as film, TV plays, not only needs to match silent frame
Size sensor is examined with greater need for the physical condition synthesis of shooting video is combined in resolution ratio, optical aberration, cell breath etc.
Consider, while being also required to make overall plans in terms of weight and cost.Cinema scene not only possesses most top optics quality, Er Qieqi
The design of mechanical structure has also fully taken into account the professional needs of film making, thus its is professional very strong.But due to film
The design difficulty and manufacture difficulty of camera lens are very high, and there are no a companys to release electricity truly at home so far
Shadow camera lens for shooting.During camera lens is focused, a series of displacement can occur for internal lens set, by specific range
Incident light focuses on imaging surface.During moving burnt between multiple focuses, the displacement of camera lens interior lens group can change picture
Face visual field size, this phenomenon become cell breath.The major defect of cinema scene includes at present：1) resolution ratio is not high：Electricity at present
The resolution ratio of shadow video camera can reach 6K or 8K, but almost all of camera lens resolving power is not on the market
Height can not match high-resolution video camera and use；2) there is apparent dark angle：Due to optical reflection and the law of refraction limitation and
The limitation of camera lens plated film level, all camera lenses more or less can all have dark angle；And camera lens are not so good as film to the control at dark angle
Camera lens is harsh, therefore dark angle is obvious, cannot be satisfied video and film shooting uses；3) distortion is big：The picture of dynamic image
Distortion often seems to become apparent from than still photo, and pincushion or barrel distortion once will when dynamic element occurs in picture
Show shape at once, and can be more serious when the movement of video camera subjectivity visual angle；If the appearance within sweep of the eye of theater viewers is too
Apparent distortion, then it is possible that causing to move vertigo；So the image field of cinema scene must be as straight as possible；And due to phase
Machine camera lens is often inadequate to the control of distortion, so cannot be satisfied high request of the cinema scene to distortion；4) cell breath is apparent：
Camera lens will produce cell breath during being focused, and cell breath is in addition to can not almost discover for camera lens
Except composition changes, picture is not influenced by cell breath；And it carries out chasing after coke or in difference for film making, in picture
The gimmick that coke is moved between main body is very common, so to inhibiting the requirement of cell breath very high, general camera lens cannot be satisfied
It is required that.
Utility model content
The utility model is directed to deficiencies of the prior art, proposes that one kind is dolly-out,ed dolly-back interchangeable tight shot, full
The 8k resolution ratio of foot matching silent frame and super35 picture film cameras, camera lens are whole without dark in changing object distance focussing process
Angle, and distort that small, cell breath is faint under each object distance, while there is superelevation cost performance and machinability.
The utility model is achieved through the following technical solutions：
The utility model includes：The field angle for being used to converge light and forming demand set gradually from the object side to image side
First eyeglass group, diaphragm and the second eyeglass group for focusing and correcting aberration, wherein：First eyeglass group includes：With positive light
First eyeglass of focal power, the second eyeglass with positive light coke, the third eyeglass with positive light coke, with negative power
Four eyeglasses；Second eyeglass group includes：The 5th eyeglass with negative power, the 6th lens with positive light coke, with positive light
The cemented doublet of focal power, i.e. the 8th eyeglass；Diaphragm and the spacing of the second eyeglass group are fixed, to which composition can be transported before and after optical axis
Dynamic zoom group.When shooting object from infinity to when short distance variation, the first eyeglass group is fixed, diaphragm and the second eyeglass
Group is whole to be focused from image space to object space movement.
The first eyeglass group is positive light coke.
The second eyeglass group is positive light coke, and the 5th to the 8th eyeglass therein is preferably aspherical lens, is used for
Further promote image quality.
6th lens have the eyeglass of positive light coke using the lens combination or monolithic of two panels positive light coke, wherein
Monolithic eyeglass can dramatically increase symmetry and have smaller distortion.
Technique effect
Compared with prior art, the utility model technique effect includes：
1) it is to solve the problems, such as that existing camera lens resolution ratio is too low to be difficult to matched sensors, the utility model is in camera lens
Glass aspheric eyeglass is added, resolving power and resolution ratio have been obviously improved, the utility model is made to disclosure satisfy that current market
The use of the professional 8K resolution cameras of upper highest resolution.
2) big to solve the problems, such as that existing camera lens distort, the utility model optimizes the structure and light path of camera lens, makes
Two group of eyeglass has symmetry about diaphragm as possible before and after diaphragm so that distortion is minimum, and TV distortion is 2% hereinafter, ensure that
Picture is not in deformation and distortion situation from center to periphery.
3) it is to solve the problems, such as that camera lens surrounding brightness is too low to dark angle occur, the utility model is used in design
It is designed with the angle of incidence of light that sensor matches, improves periphery light ratio.Even if when aperture standard-sized sheet, periphery is bright
Than also 40% or more, the light by entire camera lens being made to present evenly on picture, without dark angle in full object distance range.
4) it is to solve the problems, such as that existing camera lens cell breath is apparent, the utility model is whole using the subsequent group of diaphragm
The mode of mobile focusing.When shooting object and changing from infinity to short distance, pre-group is fixed, diaphragm and rear group together from
Image space is focused to object space overall movement.Particularly, diaphragm is at a distance from forward and backward eyeglass during refocusing optimal
Camera lens has been accomplished from when infinitely being focused as far as minimum distance in position, and picture field angle changes within 3%, effectively weakens camera lens
Cell breath in focussing process.
Description of the drawings
Fig. 1 is 1 structural schematic diagram of embodiment；
Fig. 2 is spherical aberration, the curvature of field, distortion figure of 1 camera lens of embodiment relative to d lines；
Fig. 3 is coma figure of 1 camera lens of embodiment relative to d lines；
Fig. 4 is 2 structural schematic diagram of embodiment；
Fig. 5 is spherical aberration, the curvature of field, distortion figure of 2 camera lens of embodiment relative to d lines；
Fig. 6 is coma figure of 2 camera lens of embodiment relative to d lines；
In figure：First eyeglass group G1, diaphragm STP, the second eyeglass group G2, the first eyeglass L1, the second eyeglass L2, third eyeglass
L3, the 4th eyeglass L4, the 5th eyeglass L5, the 6th eyeglass L6, the 7th eyeglass L7, the 8th eyeglass L8, image planes IMG.
Specific implementation mode
Embodiment 1
As shown in Figure 1, the present embodiment includes：What is set gradually from the object side to image side is used to converge light and form demand
The first eyeglass group G1, the diaphragm STP of field angle and the second eyeglass group G2 for focusing and correcting aberration, wherein：First eyeglass
Group G1 include：The first eyeglass L1 with positive light coke, the second eyeglass L2 with positive light coke, the third with positive light coke
Eyeglass L3, the 4th eyeglass L4 with negative power；Second eyeglass group G2 includes：The 5th eyeglass L5 with negative power, with
And the 7th eyeglass L7 including having the 6th eyeglass L6 of positive light coke and with positive light coke the 6th lens, with positive light focus
The cemented doublet of degree, i.e. the 8th eyeglass L8；Diaphragm STP and the spacing of the second eyeglass group G2 are fixed, to which composition can be along optical axis
The zoom group moved forward and backward.When shooting object from infinity to when short distance variation, the first eyeglass group G1 is fixed, diaphragm
STP and the second eyeglass group G2 is whole to be focused from image space to object space movement.
The first eyeglass group G1 is positive light coke.
The second eyeglass group G2 is positive light coke, and the 5th to the 8th eyeglass therein is preferably aspherical lens, is used
In further promotion image quality.
The spacing of the 4th lens posterior surface center to diaphragm meets (10mm, 40mm)；Before 5th eyeglass
The spacing of centre of surface to diaphragm meets (3.5mm, 7.5mm) so that camera lens object distance is from infinitely as far as the process of short distance change
In, the field angle variation of camera lens is small.If less than the lower limit of the conditional, lens aperture diameter and entire outer diameter can be caused to increase
Greatly, difficulty promotion is made；If higher than the lower limit of the conditional, during leading to lens focusing, field angle variation is excessive, exhales
It is apparent to inhale effect.
The spacing of the 4th lens posterior surface center to diaphragm meets (13.21mm, 37.15mm) in the present embodiment；5th mirror
The spacing of piece front surface center to diaphragm is 5.50.
The optic back focal of the interchangeable tight shot of dolly-out,ing dolly-back and the ratio of whole focal length meet (0.3,0.7), make
The focal length of camera lens and the ratio of rear coke are obtained in a suitable range.If less than the lower limit of the conditional, camera lens can be caused
Rear coke it is too short, it is difficult to match film camera on the market, reduce the versatility of camera lens；If upper higher than the conditional
Limit, then rear lens focus can be caused long, from it is infinite as far as short distance focus when, the whole spherical aberration and coma mistake of the second eyeglass group G2
Greatly, image quality declines.
The focal distance ratio of the first eyeglass group G1 and the second eyeglass group G2 meets (1.7,2.5), if being less than the conditional
Lower limit, then camera lens the first eyeglass group's G1 optical power profiles can be caused excessive, and then cause second eyeglass group's G2 focal powers too low,
So that the eyeglass bore of the second eyeglass group G2 increases, overall weight increases, and cost is excessively high；If higher than the upper limit of the conditional,
Camera lens the first eyeglass group's G1 light focuss are caused to be spent weak so that camera lens front end eyeglass bore is excessive, also results in camera lens overall weight
Increase, is unfavorable for the miniaturization of camera lens, is also unfavorable for the adjustment of the assembly and overall weight and center of gravity of camera lens.
The focal length of the first eyeglass group G1 and the second eyeglass group G2 are respectively 251.1mm and 113.5mm, ratio in the present embodiment
Value is 2.21.
The specific refractivity of the refractive index of nearly object space side mirror piece and nearly image side eyeglass meets in 8th eyeglass
(0.2,0.5), if less than the lower limit of the conditional, the refractive index of balsaming lens is little, is unfavorable for correcting the axis of camera lens
To aberration and ratio chromatism, while being difficult to compensate for the spherical aberration that the first eyeglass group G1 is formed；If higher than the upper limit of the conditional,
Then the reflectivity between cemented surface can be caused too strong, cause the ghost of camera lens serious；The first eyeglass group G1 can be caused to be formed simultaneously
Spherical aberration correction it is excessive, so that lens performance is reduced.
The refractive index of nearly object space side mirror piece and the refractive index of nearly image side eyeglass are respectively in the 8th eyeglass in the present embodiment
1.52 and 1.80, absolute value of the difference 0.28.
Preferably, the lens parameters in the present embodiment are specific as follows：
The EFL=135.0 of the present embodiment, BFL=56.58mm~80.52mm, (TNO is that camera lens calculates transmission to TNO=2.0
F-number after rate).The optic back focal of interchangeable of dolly-out,ing dolly-back in the present embodiment tight shot and the ratio of whole focal length are 0.42
~0.59.
Table 1
1 lens construction parameter of embodiment
Table 2
| POS1 | POS2 | |
| Z0 | INF | 815 |
| Z1 | 37.15 | 13.21 |
| Z2 | 56.58 | 80.52 |
| FOV | 18.78 | 18.32 |
From D0 to D1 change process, as object distance from it is infinite as far as nearest photo distance change process.FOV is camera lens
Diagonal field of view angle, from D0 to D1 change when, FOV has only changed 2.4%, and cell breath is faint.
In order to improve whole image quality, the curvature of field and distortion are further eliminated, the 7th eyeglass (L7) is arranged to
Aspherical, coefficient is as shown in table 3.
Table 3
Camera lens asphericity coefficient
The aspherical formula is：
Wherein：Z is aspherical
When height along optical axis direction is the position of h, away from aspheric vertex of surface apart from rise sag；C=1/R, R indicate the curvature of minute surface
Radius, K are circular cone coefficient conic, and A, B, C, D, E, F are high order aspheric surface coefficient, and the e in coefficient represents science count number,
Example e-005 indicates 10-5。
Embodiment 2
Compared with Example 1, the 6th lens using monolithic there is the eyeglass of positive light coke to realize in the present embodiment, i.e., and the 6th
Eyeglass L6, and the spacing of the 4th lens posterior surface center to diaphragm meets (15.77mm, 34.26mm) in the present embodiment；5th
The spacing of lens front surface center to diaphragm is 6.23.
The focal length of the first eyeglass group G1 and the second eyeglass group G2 are respectively 169.6mm and 91.3mm, ratio in the present embodiment
Value is 1.85.
The refractive index of nearly object space side mirror piece and the refractive index of nearly image side eyeglass are respectively in the 8th eyeglass in the present embodiment
1.48 and 1.75, absolute value of the difference 0.27.
Preferably, the lens parameters in the present embodiment are specific as follows：
The EFL=135.0mm of the present embodiment camera lens, BFL=62.11mm~80.60mm, (TNO is camera lens meter to TNO=2.2
Calculate the f-number after transmitance).The ratio of the optic back focal and whole focal length of interchangeable of dolly-out,ing dolly-back in the present embodiment tight shot
It is 0.46~0.60.
The first eyeglass group and the second eyeglass group of the present embodiment are about diaphragm symmetry higher, therefore compared to embodiment 1,
With smaller optical distortion.But the present embodiment is using aspherical, therefore as can be seen from Figure 5 spherical aberration and the curvature of field be all
Expanded compared to embodiment 1.
Table 4
Lens construction parameter
Table 5
| POS1 | POS2 | |
| Z0 | INF | 815 |
| Z1 | 34.26 | 15.77 |
| Z2 | 62.11 | 80.60 |
| FOV | 18.94 | 18.52 |
From D0 to D1 change process, as object distance from it is infinite as far as nearest photo distance change process.FOV is camera lens
Diagonal field of view angle, from D0 to D1 change when, FOV has only changed 2.3%, and cell breath is faint.
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 it local directed complete set, and the scope of protection 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 (9)
- The interchangeable tight shot 1. one kind is dolly-out,ed dolly-back, which is characterized in that including：What is set gradually from the object side to image side is used to converge Light and formed demand field angle the first eyeglass group, diaphragm STP and the second eyeglass group for focusing and correcting aberration, In：First eyeglass group includes：The first eyeglass with positive light coke, the second eyeglass with positive light coke, with positive light coke Third eyeglass, the 4th eyeglass with negative power；Second eyeglass group includes：The 5th eyeglass with negative power has The 6th lens, the cemented doublet with positive light coke of positive light coke, i.e. the 8th eyeglass；Between diaphragm STP and the second eyeglass group Away from fixation, to which composition can be along the zoom group that optical axis moves forward and backward；When shooting object changes from infinity to short distance, the One eyeglass group is fixed, and diaphragm STP and whole moved from image space to object space of the second eyeglass group are focused；Described the 6th is thoroughly Mirror has the eyeglass of positive light coke using the lens combination or monolithic of two panels positive light coke.
- 2. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that the first eyeglass group is positive light Focal power；The second eyeglass group is positive light coke, and the 5th to the 8th eyeglass therein is aspherical lens, for further carrying Rise image quality.
- 3. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that in the 4th lens posterior surface The spacing of the heart to diaphragm meets (10mm, 40mm)；The 5th lens front surface center to diaphragm spacing meet (3.5mm, 7.5mm)。
- 4. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that the interchangeable fixed-focus of dolly-out,ing dolly-back The optic back focal of camera lens and the ratio of whole focal length meet (0.3,0.7).
- 5. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that the first eyeglass group and second The focal distance ratio of eyeglass group meets (1.7,2.5).
- 6. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that nearly object space in the 8th eyeglass The specific refractivity of the refractive index of side mirror piece and nearly image side eyeglass meets (0.2,0.5).
- 7. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that the 6th lens use two panels The lens combination or monolithic of positive light coke have the eyeglass of positive light coke, i.e. the 6th eyeglass and the 7th eyeglass, wherein the 7th eyeglass For aspherical lens, aspherical formula is： Wherein：When Z is the position that the aspherical height along optical axis direction is h, away from aspheric vertex of surface apart from rise sag；C=1/R, R Indicate that the radius of curvature of minute surface, K are circular cone coefficient conic, A, B, C, D, E, F are high order aspheric surface coefficient.
- 8. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that the first table of first eyeglass Face is spherical surface, radius of curvature 61.38, thickness 8.24, refractive index 1.88, Abbe number 35.6；First mirror The second surface of piece is spherical surface, radius of curvature 104.47, thickness 1.07；The first surface of second eyeglass is spherical surface, Its radius of curvature is 68.21, thickness 9.23, refractive index 1.5, Abbe number 70.2；Second table of the second eyeglass Face is spherical surface, radius of curvature 269.53, thickness 0.68；The first surface of third eyeglass is spherical surface, radius of curvature It is 47.4, thickness 8.76, refractive index 1.62, Abbe number 63.2；The second surface of third eyeglass is spherical surface, Radius of curvature is 70.97, thickness 3.04；The first surface of 4th eyeglass is spherical surface, and radius of curvature 159.1 is thick Degree is 4.11, refractive index 1.8, Abbe number 25.6；The second surface of 4th eyeglass is spherical surface, and radius of curvature is 33.1, thickness Z1；Diaphragm spherical surface, thickness 5.5；The first surface of 5th eyeglass be spherical surface, radius of curvature be- 46.65, thickness 3.21, refractive index 1.7, Abbe number 30.2；The second surface of 5th eyeglass is spherical surface, bent Rate radius is 170.33, thickness 1.43；The first surface of 6th eyeglass is spherical surface, and radius of curvature 936.27 is thick Degree is 4.97, refractive index 1.9, Abbe number 37.5；The second surface of 6th eyeglass be spherical surface, radius of curvature be- 65.26, thickness 0.9；The first surface of 7th eyeglass be aspherical, radius of curvature 111.46, thickness 3.6, Its refractive index is 1.83, Abbe number 42.7；The second surface of 7th eyeglass is aspherical, radius of curvature 967.74, Its thickness is 11.21；The first surface circular cone coefficient of 7th eyeglass is 0, and the circular cone coefficient of the second surface of the 7th eyeglass is 0； The first surface quadravalence asphericity coefficient of 7th eyeglass is -2.16E-03, the aspherical system of quadravalence of the second surface of the 7th eyeglass Number is 2.86E-07；The six rank asphericity coefficient of first surface of 7th eyeglass is -4.03E-06, the second surface of the 7th eyeglass Six rank asphericity coefficients are 6.28E-06；The eight rank asphericity coefficient of first surface of 7th eyeglass is 5.26E-07, the 7th eyeglass Second surface eight rank asphericity coefficients be 2.55E-06；The ten rank asphericity coefficient of first surface of 7th eyeglass be- The ten rank asphericity coefficients of 3.12E-05, the second surface of the 7th eyeglass are -4.17E-08；The first surface of 8th eyeglass is ball Face, radius of curvature are -68.41, thickness 4.01, refractive index 1.52, Abbe number 68.4；The of 8th eyeglass Two surfaces are spherical surface, radius of curvature INF, thickness 4.78, refractive index 1.8, Abbe number 41.3；8th mirror The third surface of piece is spherical surface, and radius of curvature is -65.9, thickness Z2.
- 9. interchangeable tight shot according to claim 1 of dolly-out,ing dolly-back, characterized in that the first table of first eyeglass Face is spherical surface, radius of curvature 63.48, thickness 8.43, refractive index 1.92, Abbe number 31.3；First mirror The second surface of piece is spherical surface, radius of curvature 108.48, thickness 0.88；The first surface of second eyeglass is spherical surface, Its radius of curvature is 70.41, thickness 9.34, refractive index 1.61, Abbe number 84.6；Second table of the second eyeglass Face is spherical surface, radius of curvature 270.43, thickness 0.51；The first surface of third eyeglass is spherical surface, radius of curvature It is 50.18, thickness 8.12, refractive index 1.75, Abbe number 61.4；The second surface of third eyeglass is spherical surface, Its radius of curvature is 74.65, thickness 2.97；The first surface of 4th eyeglass be spherical surface, radius of curvature 163.74, Thickness is 3.92, refractive index 1.81, Abbe number 35.4；The second surface of 4th eyeglass is spherical surface, radius of curvature It is 32.59, thickness Z1；Diaphragm spherical surface, radius of curvature INF, thickness 6.23；The first surface of 5th eyeglass is Spherical surface, radius of curvature are -42.94, thickness 3.14, refractive index 1.59, Abbe number 30.5；5th eyeglass Second surface is spherical surface, radius of curvature 171.79, thickness 1.29；The first surface of 6th eyeglass is spherical surface, bent Rate radius is 936.36, thickness 5.64, refractive index 1.91, Abbe number 35.3；The second surface of 6th eyeglass For spherical surface, radius of curvature is -61.32, thickness 1.72；The first surface of 8th eyeglass be spherical surface, radius of curvature be- 68.39, thickness 3.61, refractive index 1.48, Abbe number 74.4；The second surface of 8th eyeglass is spherical surface, Radius of curvature is inf, thickness 4.99, refractive index 1.75, Abbe number 48.5；The third surface of 8th eyeglass is Spherical surface, radius of curvature are -64.1, thickness Z2.
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| CN107807439A (en) * | 2017-11-24 | 2018-03-16 | 嘉兴中润光学科技有限公司 | Interchangeable of dolly-out,ing dolly-back tight shot |
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| CN107807439A (en) * | 2017-11-24 | 2018-03-16 | 嘉兴中润光学科技有限公司 | Interchangeable of dolly-out,ing dolly-back tight shot |
| CN107807439B (en) * | 2017-11-24 | 2019-03-08 | 嘉兴中润光学科技有限公司 | Interchangeable of dolly-out,ing dolly-back tight shot |
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Address after: 314000 No.188, Taojing Road, Gaozhao street, Xiuzhou District, Jiaxing City, Zhejiang Province Patentee after: Jiaxing Zhongrun Optical Technology Co.,Ltd. Address before: 314000 Room 2F201-6, Building 6, Jiaxing Photovoltaic Science Park, 1288 Kanghe Road, Xiuzhou District, Jiaxing City, Zhejiang Province Patentee before: JIAXING ZHONGRUN OPTICAL SCIENCE AND TECHNOLOGY Co.,Ltd. |
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