CN207529007U - Standard interchangeable tight shot - Google Patents
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- CN207529007U CN207529007U CN201721593869.7U CN201721593869U CN207529007U CN 207529007 U CN207529007 U CN 207529007U CN 201721593869 U CN201721593869 U CN 201721593869U CN 207529007 U CN207529007 U CN 207529007U
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Abstract
A kind of standard interchangeable tight shot, including：The the first eyeglass group and the second eyeglass group set gradually from the object side to image side, the first eyeglass group include the first eyeglass with negative power, the second eyeglass with negative power and the third eyeglass with positive light coke；Second eyeglass group includes the 4th eyeglass with positive light coke, the 5th with positive light coke, the 6th eyeglass, the cemented doublet with negative power with negative power, that is the 7th eyeglass, the 8th eyeglass with positive light coke, the 9th eyeglass with positive light coke, diaphragm are set between the 6th eyeglass and the 7th eyeglass；When shooting object is from infinity to when closely changing, the first eyeglass group is fixed, and the second eyeglass group moves from image side to object side and focuses, and Ji Hou groups, which float, focuses；The present apparatus disclosure satisfy that the 8k resolution cameras of matching silent frame and super35 pictures, and without apparent dark angle, the minimum and cell breath that distorts is faint to wait videos and film shooting requirement.
Description
Technical field
The utility model relates to a kind of technology in optical device field, specifically a kind of standard interchangeable fixed-focus mirror
Head.
Background technology
Film shooting camera lens not only possesses most top optics quality, but also the design of its mechanical structure also fully considers
The professional needs of film making are arrived.Since these camera lenses are made to measure specifically for film shooting environment, it is placed on other necks
Domain may be less applicable in.Current camera lens almost all of on the market, resolving power is not high, can not match up to 6k at present or
The video camera of person's 8k resolution ratio uses.Because the limitation of physical law (mainly reflection and the law of refraction) and camera lens plating film water
Flat quality, all camera lenses more or less can all have dark angle.Compared with camera lens, cinema scene is more severe for the control at dark angle
It carves.The picture distortion of dynamic image often seems to become apparent from than still photo.Pincushion or barrel distortion once occur in picture
Shape will be showed when dynamic element at once.During camera lens is focused, a series of position can occur for internal lens set
It moves, the incident light of specific range is focused on imaging surface.When moving burnt between multiple focuses, camera lens interior lens group
Displacement may slightly change picture visual field size, it appears that just as slightly zoom, for film making, and picture
It inside carries out chasing after coke or moves that burnt gimmick is very common between different subjects, thus it is very high to the requirement for inhibiting cell breath, one
As camera lens can not meet the requirements.
Utility model content
The utility model is directed to deficiencies of the prior art, proposes a kind of standard interchangeable tight shot, energy
Enough 8k resolution cameras for meeting matching silent frame and super35 pictures, without apparent dark angle, distortion is minimum and cell breath is micro-
It is weak to wait videos and film shooting requirement.
The utility model is achieved through the following technical solutions：
The utility model includes：The the first eyeglass group and the second eyeglass group set gradually from the object side to image side, wherein：First
Eyeglass group includes the first eyeglass with negative power, the second eyeglass with negative power and the third mirror with positive light coke
Piece；Second eyeglass group include the 4th eyeglass with positive light coke, the 5th with positive light coke, the with negative power
Six eyeglasses, the cemented doublet with negative power, i.e. the 7th eyeglass, the 8th eyeglass with positive light coke, with positive light coke
The 9th eyeglass, diaphragm is set between the 6th eyeglass and the 7th eyeglass；When shooting object is from infinity to when closely changing,
First eyeglass group is fixed, and the second eyeglass group moves from image side to object side and focuses, and Ji Hou groups, which float, focuses.
The first eyeglass to third eyeglass in the first eyeglass group is lens, that is, be simple lens or simple lens and
The combination of cemented doublet, so as to optimize the spherical aberration and aberration during nearly object distance so that image quality is stablized during focusing.
Technique effect
Compared with prior art, the utility model technique effect includes：
1) to solve the problems, such as that existing camera lens resolution ratio is inadequate, the utility model adds glass aspheric in camera lens
Face eyeglass, has been obviously improved resolving power and resolution ratio, and the utility model is made to disclosure satisfy that current highest resolution on the market
The use of professional 8K resolution cameras.
2) to solve the problems, such as that existing camera lens have apparent dark angle, the utility model improves periphery light in design
Than.Even if when aperture standard-sized sheet, periphery light is than also more than 35%, making the light by entire camera lens be presented on picture
It obtains evenly, is conducive to Correct exposure during film shooting.
3) to solve the problems, such as that existing camera lens distortion is big, the utility model optimizes the structure and light path of camera lens, special
The symmetry of camera lens rear end group is not strengthened so that distortion is minimum, and TV distortion is 1% hereinafter, ensure that picture from center
Will not occur deforming and being distorted to most periphery.
4) to solve the problems, such as that existing camera lens cell breath is apparent, the utility model floats what is focused using rear group
Mode.When shooting object is from infinity to when closely changing, pre-group is fixed, and rear group moves from image space to object space to be gathered
It is burnt.And especially the distance of optimization diaphragm and front and rear eyeglass to optimal location, has accomplished camera lens from infinitely as far as minimum distance focusing
When, picture visual field changes within 2%, effectively to weaken cell breath.
Description of the drawings
Fig. 1 is 1 structure 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 structure 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 S, 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, the 9th eyeglass L9, image planes IMG.
Specific embodiment
Embodiment 1
As shown in Figure 1, the present embodiment includes：The first eyeglass with negative power set gradually from the object side to image side
L1, the second eyeglass L2 with negative power, the third eyeglass L3 with positive light coke, the 4th eyeglass with positive light coke
L4, the 5th L5, the 6th eyeglass L6 with negative power, diaphragm S, the glued mirror with negative power with positive light coke
Piece, i.e. the 7th eyeglass L7, the 8th eyeglass L8 with positive light coke, the 9th eyeglass L9 with positive light coke；When shooting object
From infinity to when closely changing, the first eyeglass group G1 is fixed, and the second eyeglass group G2 moves progress from image side to object side
Focusing, Ji Hou groups, which float, focuses.
The curvature ratio of eyeglass before and after the diaphragm, i.e. the 6th eyeglass L6 and cemented doublet L7 meets (0.9,1.1) so that
Camera lens object distance is from infinitely during closely change, the variation of the field angle of camera lens is small.If less than the lower limit of the conditional,
The bore that eyeglass in front of diaphragm can then be caused is excessive so that lens aperture diameter and entire outer diameter increase, cost substantially on
It rises；If higher than the lower limit of the conditional, can cause camera lens object distance from infinitely as far as closely change during, camera lens regards
Rink corner variation is excessive, and cell breath is apparent, and the shooting for being unfavorable for film uses.
The whole focal length of the standard interchangeable tight shot and the ratio of optic back focal meet (1.5,3.5), make
The focal length of camera lens and the ratio of rear coke are obtained in a suitable range.If less than the upper limit of the conditional, camera lens can be caused
It is burnt long afterwards so that the second eyeglass group G2 needs that there is higher focal power to go to adjustment spherical aberration caused by focusing and periphery
The variation of coma and aberration, causes optical property drastically to deteriorate, and the resolution ratio of 8k is not achieved；If higher than under the conditional
Limit, the then rear coke that can lead to camera lens are too short so that camera lens is not suitable for film camera on the market, and practicability is deteriorated.
The ratio of the focal length of the second eyeglass group G2 and the whole focal length of standard interchangeable tight shot meet (1,
2), if less than the conditional lower limit, camera lens the second eyeglass group's G2 optical power profiles can be caused excessive, and then lead to the first mirror
Piece group's G1 focal powers are too low so that the eyeglass bore increase of the first eyeglass group G1, overall weight increase, be unfavorable for camera lens and holding
Row is because of the focus process that object distance changes；If higher than the upper limit of the conditional, camera lens the second eyeglass group's G2 light focuss is caused to be spent
It is weak so that camera lens entirety bore is excessive, is unfavorable for the miniaturization of camera lens, is also unfavorable for the assembling of camera lens and overall weight and center of gravity
Adjustment.In addition it is also difficult to correct because of the variation of spherical aberration and periphery aberration and coma caused by focusing.
The refractive index of the 9th eyeglass L9 meets (1.65,1.85), if less than the lower limit of the conditional, the lens
Refractive index it is too low, be unfavorable for correcting the axial chromatic aberration and ratio chromatism, of camera lens, while be difficult to compensate for the first eyeglass group G1 and formed
Spherical aberration；If higher than the upper limit of the conditional, the spherical aberration correction that the first eyeglass group G1 is formed can be caused excessive, made
Lens performance reduces.Eyeglass price is too high simultaneously.
At least one in the 4th eyeglass to the 9th eyeglass in the second eyeglass group G2 is non-spherical lens, so as to aobvious
It writes and promotes resolving power, up to the video camera of 6k 8k resolution ratio uses at present to match.In addition it can make mirror using aspherical
The volume and weight of head is remarkably decreased, and realizes miniaturization.
The first eyeglass to third eyeglass in the first eyeglass group G1 is lens, that is, is simple lens or simple lens
With the combination of cemented doublet, so as to optimize the spherical aberration and aberration during nearly object distance so that during focusing image quality stablize.
Preferably, the lens parameters in the present embodiment are specific as follows：
The EFL=50.0 of the present embodiment, TNO=1.30 (TNO is that camera lens calculates the f-number after transmitance), each eyeglass
Structural parameters are as shown in table 1, and imaging parameters are as shown in Figures 2 and 3.
1 lens construction parameter of table
Table 2
| POS1 | POS2 | |
| Z0 | INF | 305 |
| Z1 | 8.72 | 1.05 |
| FOV | 46.00 | 45.36 |
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
Field angle, from D0 to D1 change when, FOV has only changed 1.4%, and cell breath is faint.
The asphericity coefficient of the 9th eyeglass L9 is as shown in table 3.
3 camera lens asphericity coefficient of table
Wherein：K is circular cone coefficient, and e is science count number, such as e-005 represents 10-5。
Embodiment 2
Compared with Example 1, the second eyeglass in the present embodiment and third lens set are into cemented doublet, the present embodiment camera lens
EFL=50.0, TNO=1.30 (TNO be camera lens calculate transmitance after f-number), structural parameters such as 4 institute of table of each eyeglass
Show, imaging parameters are as shown in Figure 4 and Figure 5.
4 lens construction parameter of table
Table 5
| POS1 | POS2 | |
| Z0 | INF | 305 |
| Z1 | 8.75 | 1.00 |
| FOV | 45.95 | 45.30 |
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
Field angle, from D0 to D1 change when, FOV has only changed 1.4%, and cell breath is faint.
The asphericity coefficient of the 9th eyeglass L9 is as shown in table 3.
6 camera lens asphericity coefficient of table
Wherein：K is circular cone coefficient, and e is science count number, such as e-005 represents 10-5。
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 (7)
1. a kind of standard interchangeable tight shot, which is characterized in that including：The first eyeglass set gradually from the object side to image side
Group and the second eyeglass group, wherein：First eyeglass group includes the first eyeglass with negative power, the second mirror with negative power
Piece and the third eyeglass with positive light coke；Second eyeglass group includes the 4th eyeglass with positive light coke, with positive light coke
The 5th, the 6th eyeglass, the cemented doublet with negative power with negative power, i.e. the 7th eyeglass, have positive light focus
8th eyeglass of degree, the 9th eyeglass with positive light coke, diaphragm are set between the 6th eyeglass and the 7th eyeglass；Work as subject
For body from infinity to when closely changing, the first eyeglass group is fixed, and the second eyeglass group moves from image side to object side to carry out pair
Coke, Ji Hou groups, which float, focuses；
At least one in the 4th eyeglass to the 9th eyeglass in the second eyeglass group is non-spherical lens；
The first eyeglass to third eyeglass in the first eyeglass group is lens, that is, is simple lens or simple lens and gluing
The combination of eyeglass.
2. standard interchangeable tight shot according to claim 1, it is characterized in that, eyeglass before and after the diaphragm, i.e.,
The curvature ratio of 6th eyeglass and cemented doublet meets (0.9,1.1).
3. standard interchangeable tight shot according to claim 1, it is characterized in that, the standard interchangeable fixed-focus
The whole focal length of camera lens and the ratio of optic back focal meet (1.5,3.5).
4. standard interchangeable tight shot according to claim 1, it is characterized in that, the focal length of the second eyeglass group
Meet (1,2) with the ratio of the whole focal length of standard interchangeable tight shot.
5. standard interchangeable tight shot according to claim 1, it is characterized in that, the refractive index of the 9th eyeglass
Meet (1.65,1.85).
6. standard interchangeable tight shot according to claim 1, it is characterized in that, the first mirror in the first eyeglass group
Piece to third eyeglass is simple lens, then the first surface of the first eyeglass is spherical surface, and radius of curvature is -352.33, thickness
It is 4.24, refractive index 1.74, Abbe number 44.7；The second surface of first eyeglass is spherical surface, and radius of curvature is
152.4, thickness 6.91；The first surface of second eyeglass be spherical surface, radius of curvature 187.79, thickness 4.83,
Its refractive index is 1.78, Abbe number 25.6；The second surface of second eyeglass is spherical surface, and radius of curvature 61.11 is thick
Spend is 9.22；The first surface of third eyeglass is spherical surface, and radius of curvature 79.94, thickness 12.48, refractive index is
1.83, Abbe number 43.2；The second surface of third eyeglass is spherical surface, and radius of curvature is -168.31, thickness Z1；
The first surface of 4th eyeglass be spherical surface, radius of curvature 53.23, thickness 8.19, refractive index 1.83, Abbe
Number is 43.2；The second surface of 4th eyeglass be spherical surface, radius of curvature 190.16, thickness 0.32；5th eyeglass
First surface is spherical surface, radius of curvature 36.09, thickness 7.11, refractive index 1.75, Abbe number 27.5；
The second surface of 5th eyeglass be spherical surface, radius of curvature 44.28, thickness 3.66；The first surface of 6th eyeglass is
Spherical surface, radius of curvature 87.58, thickness 2.42, refractive index 1.76, Abbe number 26.6；6th eyeglass
Second surface is spherical surface, radius of curvature 25.95, thickness 10.07；Diaphragm is spherical surface, thickness 9.44；7th mirror
The first surface of piece is spherical surface, and radius of curvature is -24.77, thickness 2.54, refractive index 1.78, and Abbe number is
25.7；The second surface of 7th eyeglass be spherical surface, radius of curvature 56.03, thickness 10.13, refractive index 1.72,
Its Abbe number is 54.6；The third surface of 7th eyeglass is spherical surface, and radius of curvature is -43.93, thickness 0.8；8th mirror
The first surface of piece is spherical surface, and radius of curvature 194.2, thickness 5.54, refractive index 1.83, Abbe number is
43.2；The second surface of 8th eyeglass is spherical surface, and radius of curvature is -90.99, thickness 1.63；The first of 9th eyeglass
Surface be aspherical, radius of curvature 396.44, thickness 7.96, refractive index 1.8, Abbe number 40.5；The
The second surface of nine eyeglasses is aspherical, and radius of curvature is -72.47, thickness 39.21；The first surface of 9th eyeglass
Circular cone coefficient for -60.546, the circular cone coefficient of second surface is 1.135；The quadravalence of the first surface of 9th eyeglass is aspherical
Coefficient is 1.45E-07, and the quadravalence asphericity coefficient of second surface is 4.76E-04；Six ranks of the first surface of the 9th eyeglass are non-
Asphere coefficient is -5.03E-06, and six rank asphericity coefficients of second surface are 6.23E-05；The eight of the first surface of 9th eyeglass
Rank asphericity coefficient is 2.36E-05, and eight rank asphericity coefficients of second surface are -2.37E-07；The first surface of 9th eyeglass
Ten rank asphericity coefficients for -4.12E-04, ten rank asphericity coefficients of second surface are -2.76E-09.
7. standard interchangeable tight shot according to claim 1, it is characterized in that, the second mirror in the first eyeglass group
Into cemented doublet, the first eyeglass is simple lens for piece and third lens set, then the first surface of the first eyeglass is spherical surface, and curvature is partly
Diameter is -353.06, thickness 4.94, refractive index 1.64, Abbe number 54.7；The second surface of first eyeglass is ball
Face, radius of curvature 152.13, thickness 9.63；The first surface of second eyeglass is spherical surface, and radius of curvature is
187.67, thickness 4.91, refractive index 1.68, Abbe number 35.6；The second surface of second eyeglass is spherical surface,
Radius of curvature is 79.87, thickness 12.46, refractive index 1.83, Abbe number 43.2；Second table of third eyeglass
Face is spherical surface, and radius of curvature is -168.19, thickness 9.07；The first surface of 4th eyeglass be spherical surface, radius of curvature
It is 53.59, thickness Z1, refractive index 1.83, Abbe number 43.2；The second surface of 4th eyeglass is spherical surface,
Radius of curvature is 190.96, thickness 0.95；The first surface of 5th eyeglass is spherical surface, and radius of curvature 36.51 is thick
It is 6.22 to spend, refractive index 1.75, Abbe number 27.5；The second surface of 5th eyeglass is spherical surface, and radius of curvature is
44.4, thickness 3.42；The first surface of 6th eyeglass be spherical surface, radius of curvature 87.37, thickness 2.38,
Refractive index is 1.76, Abbe number 26.6；The second surface of 6th eyeglass be spherical surface, radius of curvature 26.06, thickness
It is 10.95；Diaphragm is spherical surface, thickness 9.25；The first surface of 7th eyeglass is spherical surface, and radius of curvature is -24.82,
Its thickness is 2.11, refractive index 1.78, Abbe number 25.7；The second surface of 7th eyeglass is spherical surface, and curvature is partly
Diameter is 56.21, thickness 10.1, refractive index 1.72, Abbe number 54.6；The third surface of 7th eyeglass is ball
Face, radius of curvature are -43.91, thickness 1.07；The first surface of 8th eyeglass is spherical surface, and radius of curvature is
194.08, thickness 5.73, refractive index 1.83, Abbe number 43.2；The second surface of 8th eyeglass is spherical surface,
Radius of curvature is -91.22, thickness 1.42；The first surface of 9th eyeglass is aspherical, radius of curvature 396.51,
Its thickness is 7.58, refractive index 1.8, Abbe number 40.5；The second surface of 9th eyeglass is aspherical, curvature half
Diameter is -73.09, thickness 38.88；The circular cone coefficient of the first surface of 9th eyeglass is -20.346, the circular cone of second surface
Coefficient is 10.872；The quadravalence asphericity coefficient of the first surface of 9th eyeglass be 7.42E-07, the quadravalence aspheric of second surface
Face coefficient is 7.35E-03；Six rank asphericity coefficients of the first surface of the 9th eyeglass be -4.38E-06, six ranks of second surface
Asphericity coefficient is 2.23E-06；Eight rank asphericity coefficients of the first surface of the 9th eyeglass are 2.37E-05, second surface
Eight rank asphericity coefficients are -4.52E-08；Ten rank asphericity coefficients of the first surface of the 9th eyeglass be -1.52E-09, second
The ten rank asphericity coefficients on surface are -8.72E-09.
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| CN201721593869.7U CN207529007U (en) | 2017-11-24 | 2017-11-24 | Standard interchangeable tight shot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843973A (en) * | 2017-11-24 | 2018-03-27 | 嘉兴中润光学科技有限公司 | Standard interchangeable tight shot |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843973A (en) * | 2017-11-24 | 2018-03-27 | 嘉兴中润光学科技有限公司 | Standard interchangeable tight shot |
| CN107843973B (en) * | 2017-11-24 | 2019-08-23 | 嘉兴中润光学科技有限公司 | Standard interchangeable 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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