CN209117962U - A kind of zoom lens and video camera - Google Patents
A kind of zoom lens and video camera Download PDFInfo
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- CN209117962U CN209117962U CN201822122801.1U CN201822122801U CN209117962U CN 209117962 U CN209117962 U CN 209117962U CN 201822122801 U CN201822122801 U CN 201822122801U CN 209117962 U CN209117962 U CN 209117962U
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Abstract
The utility model embodiment provides a kind of zoom lens and video camera, the zoom lens includes preceding fixed microscope group, zoom microscope group, intermediate fixed microscope group and the focusing microscope group being directed toward image planes direction along object plane and being arranged successively, the position of fixed microscope group and the intermediate fixed microscope group is fixed before described, passes through the movement zoom microscope group and the focal length for focusing microscope group and changing the zoom lens；Fixed microscope group has positive light coke before described, and the zoom microscope group has negative power, and the intermediate fixed microscope group has positive light coke, and the focusing microscope group has positive light coke；Fixed microscope group, the zoom microscope group, the intermediate fixed microscope group and the focusing microscope group before described, there is at least one in all lens is non-spherical lens, and two surfaces of non-spherical lens are aspherical.The utility model embodiment provides a kind of zoom lens and video camera, and zoom lens volume is reduced while to realize the image quality for improving zoom lens.
Description
Technical field
The utility model embodiment is related to optic technology more particularly to a kind of zoom lens and video camera.
Background technique
Safety-security area zoom lens due to its focal length is variable can be by the picture for needing to obtain various magnifying powers of people
And it is widely used.
With the development of science and technology, security product is to miniaturization, as security monitoring video camera imaging system core component
Security lens, volume size then directly determine the overall dimensions of video camera.This is just to the miniaturization of camera lens and high-definition
Propose requirement.
Utility model content
The utility model embodiment provides a kind of zoom lens and video camera, with realize improve zoom lens image quality it is same
When reduce zoom lens volume.
In a first aspect, the utility model embodiment provides a kind of zoom lens, the zoom lens includes being directed toward along object plane
Preceding fixed microscope group that image planes direction is arranged successively, zoom microscope group, intermediate fixed microscope group and focus microscope group, before described fixed microscope group with
The position of the intermediate fixed microscope group is fixed, and changes the zoom lens by the movement zoom microscope group and the focusing microscope group
Focal length；
Fixed microscope group has positive light coke before described, and the zoom microscope group has negative power, the intermediate fixed microscope group
With positive light coke, the focusing microscope group has positive light coke；
Fixed microscope group, the zoom microscope group, the intermediate fixed microscope group and the focusing microscope group, all lens before described
It is middle there are at least one be non-spherical lens, two surfaces of non-spherical lens are aspherical.
Optionally, the absolute value of the focal length of the preceding fixed microscope group is greater than 20mm and is less than 50mm, the zoom microscope group
The absolute value of focal length is greater than 5mm and is less than 30mm, and the absolute value of the focal length of the intermediate fixed microscope group is greater than 5mm and is less than
35mm, the absolute value of the focal length for focusing microscope group are greater than 10mm and are less than 40mm.
Optionally, non-spherical lens is set in the intermediate fixed microscope group and/or the focusing microscope group.
Optionally, fixed microscope group, the zoom microscope group and the intermediate fixed microscope group before described exist extremely in any microscope group
A few balsaming lens, balsaming lens includes two lens, and the surface shape of described two lens side adjacent to one another is identical
And it fits together.
Optionally, fixed microscope group includes that the first lens, second that image planes direction is arranged successively are directed toward along object plane thoroughly before described
Mirror and the third lens, first lens have negative power, and second lens have positive light coke, the third lens tool
There is positive light coke；
The zoom microscope group includes that the 4th lens being arranged successively along object plane direction image planes direction, the 5th lens and the 6th are saturating
Mirror, the 4th lens have negative power, and the 5th lens have negative power, and the 6th lens have positive light focus
Degree；
The intermediate fixed microscope group includes that the 7th lens, the 8th lens that image planes direction is arranged successively, the are directed toward along object plane
Nine lens and the tenth lens, the 7th lens have positive light coke, and the 8th lens have positive light coke, and the described 9th thoroughly
Mirror has positive light coke, and the tenth lens have negative power；
The microscope group that focuses includes that the 11st lens, the 12nd lens, that image planes direction is arranged successively are directed toward along object plane
13 lens and the 14th lens, the 11st lens have positive light coke, and the 12nd lens have negative power, institute
The 13rd lens are stated with negative power, the 14th lens have positive light coke.
Optionally, all spherical lenses of lens in the preceding fixed microscope group；Lens in the zoom microscope group are whole
For spherical lens；
7th lens are non-spherical lens, and the 8th lens, the 9th lens and the tenth lens are ball
Face lens；
11st lens are non-spherical lens, the 12nd lens, the 13rd lens and the described 14th
Lens are spherical lens.
Optionally, the surface of non-spherical lens meets formula:
Wherein, z is the axial rise of surface Z-direction, and the radial distance on r diagonal line, k is the circular cone system of best fit circular cone
Number, c are the curvature of best fit spherical surface, and A, B, C, D, E, F, G, H are asphericity coefficient；
Wherein, the 12nd face is the front surface of the 7th lens, and the 13rd face is the rear surface of the 7th lens, the
19 faces are the front surface of the 11st lens, and the 20th face is the rear surface of the 11st lens；Lens are far from image planes
Surface be front surface, lens adjacent to the surface of image planes be rear surface.
Optionally, first lens and second lens constitute balsaming lens；
5th lens and the 6th lens constitute balsaming lens；
9th lens and the tenth lens constitute balsaming lens.
Optionally, surface of the lens far from image planes is front surface, and lens are rear surface adjacent to the surface of image planes；
The front surface of first lens is directed away from the direction protrusion of image planes, and the rear surface of first lens is towards far
Direction protrusion from image planes；The direction that the front surface of second lens is directed away from image planes is raised, after second lens
Surface is directed away from the direction protrusion of image planes；The front surface of the third lens is directed away from the direction protrusion of image planes, and described the
The rear surface of three lens is directed away from the direction protrusion of image planes；
The front surface of 4th lens is towards the direction protrusion of neighbouring image planes, and the rear surface of the 4th lens is towards far
Direction protrusion from image planes；The direction of the front surface of 5th lens towards neighbouring image planes is raised, after the 5th lens
Surface is directed away from the direction protrusion of image planes；The front surface of 6th lens is directed away from the direction protrusion of image planes, and described the
The rear surface of six lens is directed away from the direction protrusion of image planes；
The front surface of 7th lens is directed away from the direction protrusion of image planes, and the rear surface direction of the 7th lens is adjacent
The direction protrusion of nearly image planes；The direction that the front surface of 8th lens is directed away from image planes is raised, after the 8th lens
Direction protrusion of the surface towards neighbouring image planes；The front surface of 9th lens is directed away from the direction protrusion of image planes, and described the
Direction protrusion of the rear surface of nine lens towards neighbouring image planes；The direction of the front surface of tenth lens towards neighbouring image planes is convex
It rises, the rear surface of the tenth lens is directed away from the direction protrusion of image planes；
The front surface of 11st lens is directed away from the direction protrusion of image planes, the rear surface court of the 11st lens
To the direction protrusion of neighbouring image planes；The direction that the front surface of 12nd lens is directed away from image planes is raised, and the described 12nd
The rear surface of lens is directed away from the direction protrusion of image planes；The direction of the front surface of 13rd lens towards neighbouring image planes is convex
It rises, the direction of rear surface towards the neighbouring image planes of the 13rd lens is raised；The front surface of 14th lens is towards far
The direction of direction protrusion from image planes, rear surface towards the neighbouring image planes of the 14th lens is raised.
Second aspect, the utility model embodiment provide a kind of video camera, including zoom lens described in first aspect.
Zoom lens provided by the embodiment of the utility model include preceding fixed microscope group, zoom microscope group, intermediate fixed microscope group and
Microscope group is focused, the focal length of zoom lens can be changed by mobile zoom microscope group and focusing microscope group, and include extremely in zoom lens
Few one can achieve higher performance since non-spherical lens has stronger aberration correction ability for non-spherical lens, because
This in zoom lens use at least one non-spherical lens, relative to all using spherical lens for, can be realized raising
Zoom lens volume is reduced while the image quality of zoom lens.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of zoom lens provided by the embodiment of the utility model；
Fig. 2 is a kind of structural schematic diagram of video camera provided by the embodiment of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of zoom lens provided by the embodiment of the utility model, with reference to Fig. 1, zoom lens
Including along object plane OB be directed toward the preceding fixed microscope group G1 that the direction image planes IM is arranged successively, zoom microscope group G2, intermediate fixed microscope group G3 and
Microscope group G4 is focused, the position of preceding fixed microscope group G1 and intermediate fixed microscope group G3 are fixed, preceding fixed microscope group G1 and intermediate fixed microscope group
The position of G3 is fixed relative to the position of lens barrel (not shown in figure 1), preceding fixed microscope group G1 and intermediate fixed microscope group G3 relative to
Lens barrel does not move.Zoom microscope group G2 and the position for focusing microscope group G4 be not solid relative to the position of lens barrel (not shown in figure 1)
Fixed, zoom microscope group G2 and focusing microscope group G4 can be moved relative to lens barrel.By mobile zoom microscope group G2 and focus microscope group
G4 changes the focal length of zoom lens, and object plane OB is imaged onto image planes IM to realize.Preceding fixed microscope group G1 has positive light coke, zoom
Microscope group G2 has negative power, and the fixed microscope group G3 in centre has positive light coke, and focusing microscope group G4 has positive light coke.Wherein, light
Focal power is equal to the difference of image space light beam convergence and object space light beam convergence, it characterizes the ability of optical system deviation light.Light focus
The absolute value of degree is bigger, stronger to the bending ability of light, and the absolute value of focal power is smaller, weaker to the bending ability of light.
When focal power is positive number, the flexion of light is convergence property；When focal power is negative, the flexion of light is diversity.Light focus
Degree can be adapted for some plane of refraction (i.e. a surfaces of lens) for characterizing a lens, can be adapted for characterizing some
Lens are readily applicable to characterize the system (i.e. lens group) that multiple lens are collectively formed.Preceding fixed microscope group G1, zoom microscope group
G2, intermediate fixed microscope group G3 and microscope group G4 is focused, there is at least one in all lens is non-spherical lens, non-spherical lens
Two surfaces be aspherical.Any microscope group in various embodiments of the utility model (fixes microscope group G1, zoom microscope group before such as
G2, intermediate fixed microscope group G3 and focusing microscope group G4) it include at least two lens.
Zoom lens provided by the embodiment of the utility model include preceding fixed microscope group, zoom microscope group, intermediate fixed microscope group and
Microscope group is focused, the focal length of the zoom lens can be changed by mobile zoom microscope group and focusing microscope group, and wrap in zoom lens
It includes at least one and can achieve higher property since non-spherical lens has stronger aberration correction ability for non-spherical lens
Can, thus in zoom lens use at least one non-spherical lens, relative to all using spherical lens for, can be realized
Zoom lens volume is reduced while improving the image quality of zoom lens.
Optionally, zoom lens provided by the embodiment of the utility model can be the zoom lens of safety-security area, have
More than 8000000 pixels and 8,000,000 pixels, focal range 10-30mm, optics overall length is less than 51mm, and focal length zoom ratio is 3 times.
By the preferred of lens material and collocation, may be implemented such as visible light and infrared imaging clarity 8,000,000 pixels with
First-class technical indicator.
Optionally, with reference to Fig. 1, the absolute value of the focal length of preceding fixed microscope group G1 is greater than 20mm and is less than 50mm, zoom microscope group
The absolute value of the focal length of G2 is greater than 5mm and is less than 30mm, and the absolute value of the focal length of the fixed microscope group G3 in centre is greater than 5mm and is less than
35mm, the absolute value for focusing the focal length of microscope group G4 are greater than 10mm and are less than 40mm.It has the advantage that in this way, before setting
Fixed microscope group G1, zoom microscope group G2, intermediate fixed microscope group G3 and the focal length size for focusing microscope group G4, to realize reduction zoom lens
Volume.
Optionally, with reference to Fig. 1, non-spherical lens is set to intermediate fixed microscope group G3 and/or focuses in microscope group G4.Due to preceding
Fixed microscope group G1 and zoom microscope group G2 is close to object plane OB and far from lens in image planes IM, preceding fixed microscope group G1 and zoom microscope group G2
Bore is arranged bigger；Centre fixed microscope group G3 and focusing microscope group G4 is far from object plane OB and close to image planes IM, intermediate fixed mirror
Group G3 and focus lens in microscope group G4 bore setting it is smaller, by non-spherical lens be set to intermediate fixed microscope group G3 and/
Or focus in microscope group G4, it can reduce the bore of non-spherical lens, to reduce the design difficulty of non-spherical lens and be fabricated to
This.
Optionally, microscope group G3 is fixed with reference to Fig. 1, preceding fixed microscope group G1, zoom microscope group G2 and centre, existed in any microscope group
At least one balsaming lens, balsaming lens includes two lens, and the surface shape of two lens sides adjacent to one another is identical simultaneously
It fits together.Balsaming lens has good aberration correction ability, is particularly suitable for the correction of color difference.The utility model is implemented
In example, includes at least one balsaming lens in preceding fixed microscope group G1, zoom microscope group G2 and intermediate fixed microscope group G3, be conducive to zoom
The correction of color difference in camera lens.
Optionally, with reference to Fig. 1, preceding fixed microscope group G1 include along object plane OB be directed toward the direction image planes IM be arranged successively first thoroughly
Mirror 1, the second lens 2 and the third lens 3, the first lens 1 have negative power, and the second lens 2 have positive light coke, the third lens
3 have positive light coke.Zoom microscope group G2 includes that the 4th lens the 4, the 5th that the direction image planes IM is arranged successively are directed toward along object plane OB thoroughly
Mirror 5 and the 6th lens 6, the 4th lens 4 have negative power, and the 5th lens 5 have negative power, and the 6th lens 6 have positive light
Focal power.The fixed microscope group G3 in centre includes that the 7th lens 7, the 8th lens 8 that the direction image planes IM is arranged successively, the are directed toward along object plane OB
Nine lens 9 and the tenth lens 10, the 7th lens 7 have positive light coke, and the 8th lens 8 have positive light coke, and the 9th lens 9 have
Positive light coke, the tenth lens 10 have negative power.Focusing microscope group G4 includes being directed toward the direction image planes IM along object plane OB to be arranged successively
The 11st lens 11, the 12nd lens 12, the 13rd lens 13 and the 14th lens 14, the 11st lens 11 have positive light focus
Degree, the 12nd lens 12 have negative power, and the 13rd lens 13 have negative power, and the 14th lens 14 have positive light focus
Degree.
Optionally, with reference to Fig. 1, all spherical lenses of lens in preceding fixed microscope group G1, i.e. the first lens 1, second are thoroughly
Mirror 2 and the third lens 3 are spherical lens.The all spherical lenses of lens in zoom microscope group G2, the 4th lens the 4, the 5th are thoroughly
Mirror 5 and the 6th lens 6 are spherical lens.Two surfaces of spherical lens are spherical surface.The design difficulty of spherical lens is less than
Non-spherical lens, and the cost of manufacture of spherical lens is than the low manufacture cost of non-spherical lens.7th lens 7 are aspherical
Mirror, the 8th lens 8, the 9th lens 9 and the tenth lens 10 are spherical lens.11st lens 11 be non-spherical lens, the 12nd
Lens 12, the 13rd lens 13 and the 14th lens 14 are spherical lens.Zoom lens provided by the embodiment of the utility model is adopted
With two non-spherical lenses, the two non-spherical lenses are located at intermediate fixed microscope group G3 and focus in microscope group G4 (originally practical
It is aspherical in other embodiments in new embodiment by taking the 7th lens 7 and the 11st lens 11 are non-spherical lens as an example
Mirror can also be the other lenses in intermediate fixed microscope group G3 and focusing microscope group G4), it can reduce the bore of non-spherical lens, and
Balanced design difficulty, design cost and lens volume, the camera lens image quality of lens (including spherical lenses and non-spherical lens).
Optionally, with reference to Fig. 1, the 7th lens 7 and the 11st lens 11 are non-spherical lens, and the surface of non-spherical lens is full
Sufficient formula:
Wherein, z is the axial rise of surface Z-direction, and the radial distance on r diagonal line, k is the circular cone system of best fit circular cone
Number, c are the curvature of best fit spherical surface, and A, B, C, D, E, F, G, H are asphericity coefficient.
Wherein, the 12nd face is the front surface of the 7th lens 7, and the 13rd face is the rear surface of the 7th lens 7, the 19th face
For the front surface of the 11st lens 11, the 20th face is the rear surface of the 11st lens 11.Surface of the lens far from image planes IM is
Front surface, lens are rear surface adjacent to the surface of image planes IM.
Optionally, balsaming lens, the 5th lens 5 and the 6th lens 6 are constituted with reference to Fig. 1, the first lens 1 and the second lens 2
Balsaming lens is constituted, the 9th lens 9 and the tenth lens 10 constitute balsaming lens.
Optionally, with reference to Fig. 1, surface of the lens far from image planes IM is front surface, after lens are adjacent to the surface of image planes IM
Surface.The front surface of first lens 1 is directed away from the direction protrusion of image planes IM, and the rear surface of the first lens 1 is directed away from image planes
The direction protrusion of IM.The front surface of second lens 2 is directed away from the direction protrusion of image planes IM, the rear surface direction of the second lens 2
Direction protrusion far from image planes IM.The direction that the front surface of the third lens 3 is directed away from image planes IM is raised, after the third lens 3
Surface is directed away from the direction protrusion of image planes IM.The front surface of 4th lens 4 is towards the direction protrusion of neighbouring image planes IM, and the 4th thoroughly
The rear surface of mirror 4 is directed away from the direction protrusion of image planes IM.The direction of the front surface of 5th lens 5 towards neighbouring image planes IM are convex
It rises, the rear surface of the 5th lens 5 is directed away from the direction protrusion of image planes IM.The front surface of 6th lens 6 is directed away from image planes IM
Direction protrusion, the rear surface of the 6th lens 6 be directed away from image planes IM direction protrusion.The front surface of 7th lens 7 is towards far
The direction of direction protrusion from image planes IM, rear surface towards the neighbouring image planes IM of the 7th lens 7 is raised；The preceding table of 8th lens 8
Facing towards the direction protrusion far from image planes IM, the direction of rear surface towards the neighbouring image planes IM of the 8th lens 8 are raised.9th lens
9 front surface is directed away from the direction protrusion of image planes IM, and the direction of rear surface towards the neighbouring image planes IM of the 9th lens 9 are raised.
The direction of the front surface of tenth lens 10 towards neighbouring image planes IM are raised, and the rear surface of the tenth lens 10 is directed away from image planes IM's
Direction protrusion.The front surface of 11st lens 11 is directed away from the direction protrusion of image planes IM, the rear surface court of the 11st lens 11
To the direction protrusion of neighbouring image planes IM.The front surface of 12nd lens 12 is directed away from the direction protrusion of image planes IM, and the 12nd thoroughly
The rear surface of mirror 12 is directed away from the direction protrusion of image planes IM.The direction of the neighbouring image planes IM of front surface direction of 13rd lens 13
The direction of protrusion, rear surface towards the neighbouring image planes IM of the 13rd lens 13 is raised.The front surface of 14th lens 14 is towards far
The direction of direction protrusion from image planes IM, rear surface towards the neighbouring image planes IM of the 14th lens 14 is raised.
Optionally, with reference to Fig. 1, zoom lens further includes parallel flat 15, and it is separate that parallel flat 15 is located at focusing microscope group G4
The fixed side microscope group G3 in centre, parallel flat 15, which is located at, to be focused between microscope group G4 and image planes IM, for protect zoom lens not by
Mechanical damage.
Optionally, with reference to Fig. 1, zoom lens further includes diaphragm 16, and diaphragm 16 is located at zoom microscope group G2 and intermediate fixed mirror
Between group G3, the light passing amount of zoom lens can be adjusted by adjusting diaphragm 16.
A kind of design value of lens in 1 zoom lens of table
Table 1 shows a kind of design value of lens in zoom lens, and specific value size can be carried out according to product demand
It adjusts, not to the limitation of the utility model embodiment.Zoom lens shown in table 1 can be for shown in Fig. 1." lens " one
" 1 " in column indicates the first lens 1, and similarly, " 2 " in " lens " column indicate the second lens 2, and other lenses are with such
It pushes away, details are not described herein.The focal length of " focal length " column expression lens.Illustratively, correspond to the focal length numerical value " -50 of lens " 1 "
~-200 " focal length of the first lens 1 is indicated more than or equal to -200 and less than or equal to -50, and focal length is that the lens of negative are negative lens.
Focal length numerical value " 20~100 " corresponding to lens " 2 " indicates that the focal length of the second lens 2 is more than or equal to 20 and is less than or equal to 100, coke
It is positive lens away from the lens for positive number.Other lenses and so on, details are not described herein.The folding of " refractive index " column expression lens
Penetrate rate.The column " R1 " indicates the radius of curvature of the front surface of lens, and the positive value in the column " R1 " indicates to be directed away from image planes IM's
Direction is raised, and the negative value in the column " R1 " indicates the direction protrusion towards neighbouring image planes IM.The rear table of the column " R2 " expression lens
The radius of curvature in face, the positive value in the column " R2 " indicate the direction protrusion for being directed away from image planes IM, the negative value table in the column " R1 "
Show the direction protrusion towards neighbouring image planes IM.
The specific design value of one of 2 zoom lens of table
Table 2 shows the specific design value of one of zoom lens, and specific value size can be carried out according to product demand
It adjusts, not to the limitation of the utility model embodiment.Zoom lens shown in table 2 can be for shown in Fig. 1.One lens
Two surfaces are generally comprised, each surface is a plane of refraction.Serial number in table 2 is compiled according to the surface of each lens
Number.Wherein, serial number " 1 " indicates that the front surface of the first lens 1, serial number " 2 " indicate the rear surface of the first lens 1, and so on,
This is repeated no more.It should be noted that serial number " 11 " indicate diaphragm." STANDARD " in " type " column indicates spherical surface, " class
" EVENASPH " in a type " column indicates aspherical.In " radius of curvature " column, positive radius of curvature value indicates that the center of curvature exists
Close to the side image planes IM, negative radius of curvature value represents the center of curvature on surface far from the side image planes IM on surface." thickness " column
In numerical value indicate Current surface to the axis on next surface on distance." refractive index " column indicates Current surface to next table
The refractive index of medium between face." k value " column shows the numerical values recited of the circular cone coefficient of aspherical best fit circular cone.
" 7.40E-01~13.347E+00 " indicates that serial number " 5 " corresponding thickness can be any in 7.40E-01 to 13.347E+00
Numerical value." 2.78E+00~2.2E+00 " indicates that serial number " 18 " corresponding thickness can be any in 2.78E+00 to 2.2E+00
Numerical value." 1.38E+00~3.17E+00 " indicates that serial number " 25 " corresponding thickness can be appointing in 1.38E+00 to 3.17E+00
One numerical value." E " in various embodiments of the present invention indicates the index with 10 bottom of for, such as the numerical values recited of 1E+00 is 1,1E+01's
Numerical values recited is 10.
The utility model embodiment also provides a kind of video camera, and Fig. 2 is a kind of camera shooting provided by the embodiment of the utility model
The structural schematic diagram of machine, with reference to Fig. 2, video camera includes the zoom lens 100 in any of the above-described embodiment.Therefore, it may have on
State the beneficial effect of zoom lens 100.That is, reducing zoom lens 100 while can be realized the image quality for improving zoom lens 100
Volume, therefore, reduction camera volume while the utility model embodiment also can be realized the image quality for improving video camera.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation is readjusted, be combined with each other and is substituted without departing from the protection scope of the utility model.Therefore, although passing through
Above embodiments are described in further detail the utility model, but the utility model is not limited only to the above implementation
Example can also include more other equivalent embodiments in the case where not departing from the utility model design, and the utility model
Range is determined by the scope of the appended claims.
Claims (10)
1. a kind of zoom lens, which is characterized in that the zoom lens includes before being arranged successively along object plane direction image planes direction
Fixed microscope group, zoom microscope group, intermediate fixed microscope group and focusing microscope group, the position of fixed microscope group and the intermediate fixed microscope group before described
Fixation is set, the movement zoom microscope group and the focal length for focusing microscope group and changing the zoom lens are passed through；
Fixed microscope group has positive light coke before described, and the zoom microscope group has negative power, and the intermediate fixed microscope group has
Positive light coke, the focusing microscope group have positive light coke；
Microscope group, the zoom microscope group, the intermediate fixed microscope group and the focusing microscope group are fixed before described, are deposited in all lens
It is non-spherical lens at least one, two surfaces of non-spherical lens are aspherical.
2. zoom lens according to claim 1, which is characterized in that the absolute value of the focal length of fixed microscope group is greater than before described
20mm and it is less than 50mm, the absolute value of the focal length of the zoom microscope group is greater than 5mm and is less than 30mm, the intermediate fixed microscope group
The absolute value of focal length is greater than 5mm and is less than 35mm, and the absolute value of the focal length for focusing microscope group is greater than 10mm and is less than 40mm.
3. zoom lens according to claim 1, which is characterized in that non-spherical lens is set to the intermediate fixed microscope group
And/or in the focusing microscope group.
4. zoom lens according to claim 1, which is characterized in that fixed microscope group, the zoom microscope group and institute before described
Intermediate fixed microscope group is stated, there is at least one balsaming lens in any microscope group, balsaming lens includes two lens, and described two
The surface shape of lens side adjacent to one another is identical and fits together.
5. zoom lens according to claim 1, which is characterized in that fixed microscope group includes being directed toward image planes along object plane before described
The first lens, the second lens and the third lens that direction is arranged successively, first lens have negative power, and described second thoroughly
Mirror has positive light coke, and the third lens have positive light coke；
The zoom microscope group includes being directed toward the 4th lens, the 5th lens and the 6th lens that image planes direction is arranged successively along object plane,
4th lens have negative power, and the 5th lens have negative power, and the 6th lens have positive light coke；
The intermediate fixed microscope group includes that the 7th lens, the 8th lens, the 9th that image planes direction is arranged successively are directed toward along object plane thoroughly
Mirror and the tenth lens, the 7th lens have positive light coke, and the 8th lens have positive light coke, the 9th lens tool
There is positive light coke, the tenth lens have negative power；
The microscope group that focuses includes being directed toward the 11st lens, the 12nd lens, the 13rd that image planes direction is arranged successively along object plane
Lens and the 14th lens, the 11st lens have a positive light coke, and the 12nd lens have a negative power, and described the
13 lens have negative power, and the 14th lens have positive light coke.
6. zoom lens according to claim 5, which is characterized in that all spherical surfaces of lens before described in fixed microscope group
Lens；The all spherical lenses of lens in the zoom microscope group；
7th lens are non-spherical lens, and the 8th lens, the 9th lens and the tenth lens are that spherical surface is saturating
Mirror；
11st lens are non-spherical lens, the 12nd lens, the 13rd lens and the 14th lens
For spherical lens.
7. zoom lens according to claim 6, which is characterized in that the surface of non-spherical lens meets formula:
Wherein, z is the axial rise of surface Z-direction, and the radial distance on r diagonal line, k is the circular cone coefficient of best fit circular cone, c
For the curvature of best fit spherical surface, A, B, C, D, E, F, G, H are asphericity coefficient；
Wherein, the 12nd face be the 7th lens front surface, the 13rd face be the 7th lens rear surface, the 19th
Face is the front surface of the 11st lens, and the 20th face is the rear surface of the 11st lens；Table of the lens far from image planes
Face is front surface, and lens are rear surface adjacent to the surface of image planes.
8. zoom lens according to claim 5, which is characterized in that first lens and second lens constitute glue
Close lens；
5th lens and the 6th lens constitute balsaming lens；
9th lens and the tenth lens constitute balsaming lens.
9. zoom lens according to claim 5, which is characterized in that surface of the lens far from image planes is front surface, lens
The surface of neighbouring image planes is rear surface；
The front surface of first lens is directed away from the direction protrusion of image planes, and the rear surface of first lens is directed away from picture
The direction protrusion in face；The front surface of second lens is directed away from the direction protrusion of image planes, the rear surface of second lens
It is directed away from the direction protrusion of image planes；The front surface of the third lens is directed away from the direction protrusion of image planes, and the third is saturating
The rear surface of mirror is directed away from the direction protrusion of image planes；
The direction of the front surface of 4th lens towards neighbouring image planes is raised, and the rear surface of the 4th lens is directed away from picture
The direction protrusion in face；Direction protrusion of the front surface of 5th lens towards neighbouring image planes, the rear surface of the 5th lens
It is directed away from the direction protrusion of image planes；The front surface of 6th lens is directed away from the direction protrusion of image planes, and the described 6th thoroughly
The rear surface of mirror is directed away from the direction protrusion of image planes；
The front surface of 7th lens is directed away from the direction protrusion of image planes, and the rear surface of the 7th lens is towards adjacent to picture
The direction protrusion in face；The front surface of 8th lens is directed away from the direction protrusion of image planes, the rear surface of the 8th lens
Towards the direction protrusion of neighbouring image planes；The front surface of 9th lens is directed away from the direction protrusion of image planes, and the described 9th thoroughly
Direction protrusion of the rear surface of mirror towards neighbouring image planes；The direction of the front surface of tenth lens towards neighbouring image planes is raised,
The rear surface of tenth lens is directed away from the direction protrusion of image planes；
The front surface of 11st lens is directed away from the direction protrusion of image planes, and the rear surface direction of the 11st lens is adjacent
The direction protrusion of nearly image planes；The front surface of 12nd lens is directed away from the direction protrusion of image planes, the 12nd lens
Rear surface be directed away from image planes direction protrusion；The direction of the front surface of 13rd lens towards neighbouring image planes is raised,
Direction protrusion of the rear surface of 13rd lens towards neighbouring image planes；The front surface of 14th lens is directed away from picture
The direction of the direction protrusion in face, rear surface towards the neighbouring image planes of the 14th lens is raised.
10. a kind of video camera, which is characterized in that including the described in any item zoom lens of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822122801.1U CN209117962U (en) | 2018-12-17 | 2018-12-17 | A kind of zoom lens and video camera |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822122801.1U CN209117962U (en) | 2018-12-17 | 2018-12-17 | A kind of zoom lens and video camera |
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| CN209117962U true CN209117962U (en) | 2019-07-16 |
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| CN201822122801.1U Active CN209117962U (en) | 2018-12-17 | 2018-12-17 | A kind of zoom lens and video camera |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445079A (en) * | 2018-12-17 | 2019-03-08 | 东莞市宇瞳光学科技股份有限公司 | A kind of zoom lens and video camera |
| CN110361855A (en) * | 2019-08-19 | 2019-10-22 | 嘉兴中润光学科技有限公司 | It dolly-out,s dolly-back microspur interchangeable tight shot |
-
2018
- 2018-12-17 CN CN201822122801.1U patent/CN209117962U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445079A (en) * | 2018-12-17 | 2019-03-08 | 东莞市宇瞳光学科技股份有限公司 | A kind of zoom lens and video camera |
| CN109445079B (en) * | 2018-12-17 | 2024-04-09 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens and camera |
| CN110361855A (en) * | 2019-08-19 | 2019-10-22 | 嘉兴中润光学科技有限公司 | It dolly-out,s dolly-back microspur interchangeable tight shot |
| CN110361855B (en) * | 2019-08-19 | 2021-03-30 | 嘉兴中润光学科技股份有限公司 | Telephoto microspur exchangeable fixed focus lens |
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