CN107193117B - Compact high-resolution zoom lens - Google Patents
Compact high-resolution zoom lens Download PDFInfo
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- CN107193117B CN107193117B CN201710563800.8A CN201710563800A CN107193117B CN 107193117 B CN107193117 B CN 107193117B CN 201710563800 A CN201710563800 A CN 201710563800A CN 107193117 B CN107193117 B CN 107193117B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
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Abstract
The present invention relates to a kind of zoom lens, in particular to a kind of compact high-resolution zoom lens, the optical system of camera lens includes the 4th lens group that the third lens group being positive along the second lens group, the focal power that the first lens group, the focal power that the focal power that light incident direction is set gradually is positive are negative and focal power are positive, and diaphragm piece is provided on front side of the third lens group；First lens group is first fixed group, and second lens group is zoom group, and the third lens group fixes group after being, the 4th lens group is compensation group.The compact high-resolution zoom lens is not only compact-sized, but also focal power distribution is rationally, is conducive to the correction of aberration.
Description
Technical field
The present invention relates to a kind of zoom lens, in particular to a kind of compact high-resolution zoom lens.
Background technique
With the development of engineering technology, zoom lens is always higher toward resolution ratio, and light passing amount is bigger and zoom ratio is bigger
Development.Meeting the zoom lens of conditions above, often size is also bigger.Four traditional constituent element mechanical compensation zoom lens, generally
Using the combining form of "+-++ ", second group is zoom group, and third group is compensation group, is then contracted by the way of changing root
The size of mini system.When system dimension further shortens, the relative aperture that will lead to zoom group and compensation group is excessive, then solid
Surely the relative aperture organized is smaller, i.e. focal power unreasonable distribution.For zoom system, pancreatic system, the aberration of each constituent element needs respective
Correction, therefore biggish relative aperture is the basic reason that image quality can not further increase, but this structure will be reduced
The relative aperture of zoom group and compensation group must just increase system dimension.Therefore it needs to change zoom and compensation way.And it navigates
It, airborne and carrier-borne etc. military equipments the weight and size of instrument are required very strict, therefore be badly in need of a kind of compact high score
Resolution zoom lens.
Summary of the invention
It is not only compact-sized the purpose of the present invention is to provide a kind of compact high-resolution zoom lens, but also light focus
Degree distribution rationally, is conducive to the correction of aberration.
Technical program of the present invention lies in: a kind of compact high-resolution zoom lens, the optical system of camera lens include edge
The second lens group, the focal power that the first lens group, the focal power that the focal power that light incident direction is set gradually is positive are negative be
The 4th lens group that positive the third lens group and focal power are positive, is provided with diaphragm piece on front side of the third lens group；It is described
First lens group is first fixed group, and second lens group is zoom group, and the third lens group fixes group after being, the described 4th
Lens group is compensation group.
Further, first lens group is by the first crescent moon positive lens, the first bent moon negative lens, second that set gradually
Crescent moon positive lens, the second bent moon negative lens and third crescent moon positive lens groups are at the first bent moon negative lens and the second crescent moon are just
Lens are glued together, and the second bent moon negative lens and third crescent moon positive lens are glued together；Second lens group by
Third bent moon negative lens, the first double-concave negative lens, the first plano-convex positive lens and the 4th bent moon negative lens group set gradually is at institute
It states the first double-concave negative lens and the first plano-convex positive lens is glued together；The third lens group is by the first biconvex for setting gradually
Positive lens, the first bent moon positive lens, the second bent moon positive lens, the second double-concave negative lens and the second biconvex positive lens composition, it is described
Second bent moon positive lens and the second double-concave negative lens are glued together；4th lens group by the third bent moon that sets gradually just
Lens, the 5th full moon negative lens and third biconvex positive lens composition, the third bent moon positive lens and the 5th full moon negative lens glue
It is combined.
Further, the focal length of first lens groupMaximum clear aperture is, the focal length of the second lens group
Maximum clear aperture is, the focal length of the third lens groupMaximum clear aperture is, the focal length of the 4th lens groupMost
Big clear aperture is, the following conditions must be met:,,,；The second lens group moving range, the moving range of the 4th lens group, system overall length,
Meet the following conditions:,。
Further, the third bent moon negative lens, the first double-concave negative lens, the first plano-convex positive lens and the 4th bent moon are negative
Lens are respectively high refracting glass, and refractive index is both greater than 1.85；The diaphragm piece is adjustable diaphragm.
Further, the mechanical structure of camera lens includes the body tube positioned at middle part, is provided with tune on front side of the body tube
Burnt body tube is provided with the preceding group lens barrel that can be moved forward and backward and for group fixed before installing, the master in the focusing body tube
The interior forward end of lens barrel is provided with the zoom lens barrel for installing zoom group and can be moved forward and backward, and is provided in body tube for pacifying
The rear group lens barrel of fixed group, the Internal back end of body tube are provided with the compensating glass that can be moved forward and backward and for installing compensation group after dress
Cylinder, the rear side of body tube are also equipped with diaphragm seat, and the diaphragm piece of fixed group front side after being located at is equipped in the diaphragm seat.
Further, focusing cam is equipped with outside the focusing body tube, focusing body tube side is provided with focusing fine motion
The focusing motor and adjust potentiometer that switch and focusing cam are driven by tooth engagement, have and tune on the adjusting cam
The focusing retaining screw that burnt microswitch matches is additionally provided on focusing cam across focusing cam and focusing body tube and preceding group of mirror
Cylinder be connected for drive preceding group lens barrel be moved forward and backward focusing guide pin component.
Further, the focusing motor is placed on focusing body tube through focusing motor rack, the focusing microswitch
Limiting bracket of being focused is placed on focusing body tube, and it is uniformly distributed that precision machined two 180o are offered on the focusing cam
Linear skewed slot, and link together through focusing guide pin component with preceding group lens barrel, on the gear and focusing cam of the focusing motor
Gear engagement, be additionally provided in the preceding group lens barrel for limiting preceding group lens barrel rotation and the only straight trough that moves in a straight line.
Further, it is equipped with zoom cam on the body tube, is provided in body tube with body tube middle part along axial direction
The zoom Mobile base and compensation Mobile base being slidably matched, the zoom cam drive zoom through zoom guide pin and compensation guide pin respectively
Mobile base and compensation Mobile base along moving axially back and forth, the zoom lens barrel and compensation lens barrel it is corresponding be installed on zoom Mobile base with
It compensates on Mobile base；The change that body tube side is provided with zoom microswitch and is driven with zoom cam by tooth engagement
Times motor and zoom potentiometer have the zoom retaining screw matched with zoom microswitch on the zoom cam.
Further, it is separately provided for cooperatively forming the axis of rolling between the front and back end and body tube of the zoom cam
The steel ball held, and it is set the zoom cam pressing ring locking in primary mirror tube rear end；Zoom curve is provided on the zoom cam
Slot and compensated curve slot, it is described to have zoom curved groove and compensated curve slot respectively through zoom guide pin and compensation guide pin zoom cam
It links together with zoom Mobile base, compensation Mobile base；The zoom motor, zoom potentiometer are placed in through zoom electric machine support
On body tube, the zoom microswitch is placed on body tube through zoom limit switch frame；The gear and zoom of zoom motor
Cam-engaged is provided on the body tube for limiting zoom guide pin part and compensation guide pin and moving zoom Mobile base, compensation
The rotary motion of dynamic seat becomes two straight troughs of linear motion.
Further, the light that the rear group lens barrel is internally provided with the diaphragm rotating ring pressing plate matched and is equipped with diaphragm piece
Late rotating ring, Iris motor is provided on the downside of the diaphragm seat, and the Iris motor is driven through tooth engagement and is placed on diaphragm seat
On aperture setting ring be connected, the diaphragm microswitch for controlling diaphragm openings of sizes is additionally provided on diaphragm seat, it is described
There is the diaphragm retaining screw matched with diaphragm microswitch on aperture setting ring；The diaphragm microswitch is through diaphragm limiting bracket
Be placed on diaphragm seat, the diaphragm piece is placed on diaphragm rotating ring through rivet interlacement, the diaphragm rotating ring through diaphragm dial nail with
Aperture setting ring connection, the diaphragm dial nail with aperture setting ring rotary motion under the drive of Iris motor；The diaphragm is dynamic
Ring is with diaphragm retaining screw rotary motion, diaphragm microswitch and diaphragm retaining screw cooperating.
Compared with prior art, the invention has the following advantages that
The present invention uses the mechanical compensation structure of two, four constituent elements movement, i.e., first group is first fixed group, and second group is zoom
Group, third group fix group after being, the 4th group is compensation group.This zoom form is different from traditional first fixed group, zoom group, mends
The zoom system, pancreatic system structure for repaying group and rear fixed group fixes thereafter group before compensation group, before light enters compensation group, after
Laser beam compression can be reduced the burden of compensation group, can make the focal power reasonable distribution of system in this way, be conducive to aberration by fixed group
Correction.For the mechanical compensation structure using the movement of two, four constituent elements, diaphragm is located at the third lens group (fixing group afterwards) front side,
Relative aperture can change when zoom, can effectively solve the defect using iris diaphgram.
Detailed description of the invention
Fig. 1 is the optical system diagram of the invention in focal length；
Fig. 2 is the optical system diagram of the invention in short focus；
Fig. 3 is the MTF of the invention in focal length；
Fig. 4 is the MTF of the invention in short focus.
Fig. 5 is the installation diagram of camera lens of the invention；
Fig. 6 is the cross-sectional view of camera lens of the invention；
Fig. 7 is the structural schematic diagram of focusing component of the invention；
Fig. 8 is the left view of Fig. 7 of the invention；
Fig. 9 is the cross-sectional view of focusing component of the invention；
Figure 10 is the structural schematic diagram of variable focus package of the invention；
Figure 11 is the right view of Figure 10 of the invention；
Figure 12 is the cross-sectional view of variable focus package of the invention；
Figure 13 is the structural schematic diagram of iris diaphgram component of the invention；
Figure 14 is the left view of Figure 13 of the invention；
Figure 15 is the cross-sectional view of iris diaphgram component of the invention；
In figure: the first lens group of A-；A1- the first crescent moon positive lens；A2- the first bent moon negative lens；The second crescent moon of A3- is just saturating
Mirror；A4- the second bent moon negative lens；A5- third crescent moon positive lens；
The second lens group of B-；B1- third bent moon negative lens；The first double-concave negative lens of B2-；B3- the first plano-convex positive lens；
The 4th bent moon negative lens of B4-；
C- the third lens group；The first biconvex positive lens of C1-；The first bent moon positive lens of C2-；The second bent moon positive lens of C3-；
The second double-concave negative lens of C4-；The second biconvex positive lens of C5-；
The 4th lens group of D-；D1- third bent moon positive lens；The 5th full moon negative lens of D2-；D3- third biconvex positive lens；
51- focusing component；52- variable focus package；53- iris diaphgram component；54- camera assembly；
Pressing ring is organized before 61-；62- focusing cam pressing ring；63- focusing cam；64- focusing guide pin component；65- preceding group lens barrel；
66- focusing potentiometer；67- focusing motor；68- focusing motor rack；The gear of 69- focusing motor；The tooth of 610- focusing potentiometer
Wheel；611- microswitch；612- focusing limiting bracket；Spacer ring 2 is organized before 613-；Spacer ring 1 is organized before 614-；615- focusing body tube；
The linear skewed slot of 616-；
71- zoom pressing ring；72- the first zoom spacer ring；73- zoom lens barrel；74- zoom Mobile base；The second zoom of 75- every
Circle；76- body tube；77- zoom cam；78- steel ball；79- zoom cam pressing ring；710- compensates pressing ring；711- compensates spacer ring；
712- compensates lens barrel；713- compensates Mobile base；714- guide rod；715- cam cover；Group adjustment gasket before 716-；717- connection bottom
Seat；718- zoom potentiometer；719- zoom motor；720- zoom motor rack；721- zoom limiting bracket；722- microswitch；
723- zoom guide pin；724- zoom curved groove；725- compensated curve slot；
81- aperture setting ring ring pressing ring；82- aperture setting ring；83- diaphragm retaining screw；84- diaphragm dials nail；Mirror is organized after 85-
Cylinder；86- diaphragm seat；87- microswitch；88- diaphragm limiting bracket；89- Iris motor gear；810- Iris motor bracket；
811- diaphragm pressing ring；Spacer ring is organized after 812-；813- diaphragm rotating ring；814- diaphragm rotating ring pressing plate；815- Iris motor.
Specific embodiment
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate attached drawing, make detailed
It is carefully described as follows, but the present invention is not limited thereto.
Referring to figs. 1 to Figure 15
A kind of compact high-resolution zoom lens, the optical system of camera lens include setting gradually along light incident direction
The third lens group and focal power that the second lens group, the focal power that the first lens group, the focal power that focal power is positive are negative are positive
The 4th lens group being positive, is provided with diaphragm piece on front side of the third lens group；First lens group is first fixed group, institute
Stating the second lens group is zoom group, and the third lens group fixes group after being, the 4th lens group is compensation group.
In the present embodiment, first lens group is by the first crescent moon positive lens A1, the first bent moon negative lens that set gradually
A2, the second crescent moon positive lens A3, the second bent moon negative lens A4 and third crescent moon positive lens A5 composition, the first bent moon negative lens
A2 and the second crescent moon positive lens A3 are glued together, and the second bent moon negative lens A4 and third crescent moon positive lens A5 are glued at one
It rises；Second lens group is by the third bent moon negative lens B1, the first double-concave negative lens B2, the first plano-convex positive lens that set gradually
B3 and the 4th bent moon negative lens B4 composition, the first double-concave negative lens B2 and the first plano-convex positive lens B3 are glued together；Institute
The third lens group is stated by the first biconvex positive lens C1, the first bent moon positive lens C2, the second bent moon positive lens C3, that set gradually
Two double-concave negative lens C4 and the second biconvex positive lens C5 composition, the second bent moon positive lens C3 and the second double-concave negative lens C4 glue
It is combined；4th lens group is double by third bent moon positive lens D1, the 5th full moon negative lens D2 and the third set gradually
Convex positive lens D3 composition, the third bent moon positive lens D1 and the 5th full moon negative lens D2 are glued together.
In the present embodiment, the focal length of first lens groupMaximum clear aperture is, the focal length of the second lens groupMaximum clear aperture is, the focal length of the third lens groupMaximum clear aperture is, the focal length of the 4th lens group
Maximum clear aperture is, the following conditions must be met:,,,；The second lens group moving range, the movement of the 4th lens group
Range, system overall length, meet the following conditions:,。
In the present embodiment, in order to realize second order spectrum when no thermalization and balance focal length, the first crescent moon positive lens A1, second
Crescent moon positive lens A3 and third crescent moon positive lens A5 are all made of abnormal dispersion glass.
In the present embodiment, in order to reduce the aberration of zoom group while control its length, the third bent moon negative lens B1,
First double-concave negative lens B2, the first plano-convex positive lens B3 and the 4th bent moon negative lens B4 are respectively high refracting glass, and refractive index
Both greater than 1.85.
In the present embodiment, for the residual aberration of remaining each group of balance system, rear fixed group uses 5 chips.In order to adjust
Light passing amount, the diaphragm piece are adjustable diaphragm.
The technical indicator of the zoom lens is as follows: 2/3 inch of image planes, pixel 5.5um, that is, MTF is greater than in 110lp/mm
0.2, zooming range 11mm ~ 270mm, maximum distortion is less than 3%, relative aperture 1:5, and -40 DEG C ~+60 DEG C of operating temperature, optics
Overall length is less than 143mm.
In the present embodiment, the optical parameter range of each eyeglass is as shown in table 1 below:
Table 1.
In the present embodiment, interval data when focal length and short focus is as shown in table 2 below；
Table 2.
In the present embodiment, the mechanical structure of camera lens includes the body tube 76 positioned at middle part, the front side setting of the body tube
There is focusing body tube 615, the preceding group lens barrel that can be moved forward and backward and for group fixed before installing is provided in the focusing body tube
65, the interior forward end of the body tube is provided with the zoom lens barrel 73 for installing zoom group and can be moved forward and backward, in body tube
It is provided with the rear group lens barrel 85 for group fixed after installing, the Internal back end of body tube, which is provided with, can be moved forward and backward and for installing
The compensation lens barrel 712 of compensation group, the rear side of body tube are also equipped with diaphragm seat 86, are equipped with after being located in the diaphragm seat
The diaphragm piece of fixed group front side.
In the present embodiment, focusing cam 63 is equipped with outside the focusing body tube, focusing body tube side is provided with focusing
The focusing motor 67 and adjust potentiometer 66, the adjusting cam that microswitch 611 and focusing cam are driven by tooth engagement
It is upper that there is the focusing retaining screw matched with focusing microswitch, it is additionally provided on focusing cam across focusing cam and focusing primary mirror
Cylinder be connected with preceding group lens barrel for drive preceding group lens barrel back-and-forth motion focusing guide pin component 64.
In the present embodiment, the focusing motor 67 is placed on focusing body tube 615 through focusing motor rack 68, the focusing
Microswitch 611 is placed on focusing body tube 615 through focusing limiting bracket 612, offers precision on the focusing cam 63
Two 180o of processing uniformly distributed linear skewed slot 616, and link together through focusing guide pin component 64 with preceding group lens barrel 65, it is described
The gear 69 of focusing motor is engaged with the gear on focusing cam 63, is additionally provided in the preceding group lens barrel for limiting preceding group of mirror
The straight trough that cylinder is rotated and only moved in a straight line.It is rotated when focusing motor 67 is powered, the gear 69 for passing through motor of focusing drives focusing
Cam 63 rotates, and is limited by the straight trough in preceding group lens barrel 65, the rotation of preceding group lens barrel 65 is limited, to only do in straight trough
Linear motion is exchanged to realize the focusing function to far and near target by microswitch 611 and the collective effect of focusing retaining screw
Burnt cam 63 and focusing motor 611 play limit and protective effect.
In the present embodiment, the front end of the preceding group lens barrel is provided with the preceding group of pressure for being pressed on front side of the first crescent moon positive lens
Circle 61 organizes spacer ring 614, second crescent moon before being provided with first between the first crescent moon positive lens and the first bent moon negative lens
Spacer ring 613 is organized before being provided with second between positive lens and the second bent moon negative lens.The gear 610 of the focusing potentiometer and focusing
Gear on cam is meshed.
When the focusing of system changes, adjust the gear 610 of potentiometer and engage with cam 63 is adjusted, synchronization with tune
Opposite rotation occurs for burnt cam 63, and the resistance value of potentiometer changes, and can find out potentiometer by sample circuit appropriate
Changing value, and control centre is transmitted to, to realize the display of focus value；Conversely, providing respective resistance values life by control centre
Enable the real-time control, it can be achieved that focal length.
In the present embodiment, the body tube 75 is connected with pedestal 717 is connect, and zoom cam is equipped on body tube
77, be provided in body tube 75 and body tube in the middle part of slide axially cooperation zoom Mobile base 74 and compensate Mobile base 713, institute
It states zoom cam 77 and drives zoom Mobile base and compensation Mobile base edge to move axially back and forth respectively through zoom guide pin 723 and compensation guide pin
Dynamic, the zoom lens barrel 73 and compensation lens barrel 712 are corresponded to and are installed on zoom Mobile base 74 and compensation Mobile base 713；Positioned at master
Lens barrel side is provided with zoom microswitch 722 and the zoom motor 719 being driven with zoom cam 77 by tooth engagement and becomes
Times potentiometer 718 has the zoom retaining screw matched with zoom microswitch on the zoom cam.
In the present embodiment, it is respectively arranged with steel ball 78 between the front and back end and body tube of the zoom cam 77, so as to become
Times rolling bearing is cooperatively formed between cam and body tube, zoom cam is set the zoom cam pressing ring 79 in primary mirror tube rear end
Locking；Zoom curved groove 724 and compensated curve slot 725 are provided on the zoom cam 77, it is described to have zoom curved groove and benefit
Curved groove is repaid respectively to connect zoom cam 77 and zoom Mobile base 74, compensation Mobile base 713 through zoom guide pin 723 and compensation guide pin
It is connected together；The zoom motor 719, zoom potentiometer 718 are placed on body tube 75 through zoom electric machine support 720, described
Zoom microswitch 722 is placed on body tube 75 through zoom limit switch frame 721；The gear and zoom cam 77 of zoom motor
Gear engagement, be provided on the body tube for limiting zoom guide pin part and compensation guide pin and making zoom Mobile base 74, mend
The rotary motion for repaying Mobile base 713 becomes two straight troughs of linear motion.When 719 rotor of zoom motor does positive and negative rotary motion
It is that zoom cam 77 is driven to correspondingly rotate, zoom is driven by zoom, compensated curve slot and zoom guide pin, compensation guide pin
Mobile base 74, compensation Mobile base 713 move in the way of zoom, compensated curve slot, and two on body tube 75 straight trough plays limit
The effect of zoom guide pin part, compensation guide pin processed, and the rotary motion of zoom Mobile base 74, compensation Mobile base 713 is made to become straight line
Movement；Straight line on the curved groove and body tube 75 of strict control zoom guide pin component and compensation guide pin component and zoom cam 77
Fit clearance between slot guarantees that zoom component and compensation component slide steadily, without cassette tape.It is rotated in this way by motor and realizes change
Times lens barrel and compensation lens barrel do linear motion back and forth by zoom motion equation requirement, to realize the consecutive variations of system focal length
Function.
In the present embodiment, the upper and lower sides inside the body tube are separately provided for zoom Mobile base and compensation Mobile base
The guide rod 714 of mobile guide, be additionally provided on front side of the body tube when being connected with preceding group lens barrel for adjust therebetween away from
From preceding group of adjustment gasket 716.
In the present embodiment, the front end of the zoom lens barrel is provided with the zoom for being pressed on front side of third bent moon negative lens B1
Pressing ring 71, zoom lens barrel is interior to be provided with the first zoom spacer ring between third bent moon negative lens and the first double-concave negative lens B2
72, the second zoom spacer ring is provided between the first plano-convex positive lens B3 and the 4th bent moon negative lens B4.
In the present embodiment, the rear end of portion, institute compensation lens barrel is provided with for being pressed on third biconvex positive lens D1 rear end face
Compensate pressing ring 710, compensation lens barrel in be provided with positioned at the 5th full moon negative lens D2 and third biconvex positive lens D3 between compensate every
Circle 711.
In the present embodiment, the rear group lens barrel 85 is internally provided with the diaphragm rotating ring pressing plate 814 matched and is equipped with light
The diaphragm rotating ring 813 of late piece is provided with Iris motor 815 on the downside of the diaphragm seat, and the Iris motor is driven through tooth engagement
It is connected with the aperture setting ring 82 being placed on diaphragm seat, the light for controlling diaphragm openings of sizes is additionally provided on diaphragm seat
Late microswitch 87 has the diaphragm retaining screw 83 matched with diaphragm microswitch on the aperture setting ring 82；The diaphragm
Microswitch 87 is placed on diaphragm seat 86 through diaphragm limiting bracket 88, and the diaphragm piece is placed in diaphragm rotating ring through rivet interlacement
On 813, the diaphragm rotating ring 813 is dialled nail 84 through diaphragm and is connect with aperture setting ring 82, and diaphragm rotating ring 813 drives the rotation of diaphragm piece
To control the variation of aperture openings size, the variation of Electronic control aperture size is realized；The diaphragm is dialled nail and is adjusted with diaphragm
The rotary motion under the drive of Iris motor 815 of ring 82；For the diaphragm rotating ring 813 with 83 rotary motion of diaphragm retaining screw, diaphragm is micro-
Dynamic switch 87 and 83 cooperating of diaphragm retaining screw, play the limit and protective effect to system in zooming procedure.
In the present embodiment, set between third bent moon positive lens D1 and the 5th full moon negative lens D2 in the rear group lens barrel
It is equipped with rear group of spacer ring, to guarantee airspace.
The foregoing is merely presently preferred embodiments of the present invention, for the ordinary skill in the art, according to this hair
Bright introduction designs various forms of compact high-resolution zoom lens and does not need creative labor, do not departing from
The case where the principle and spirit of the invention, descends to the mortal world equivalent change, modification, replacement and the change made according to scope of the present invention patent
Type is all covered by the present invention.
Claims (6)
1. a kind of compact high-resolution zoom lens, which is characterized in that the optical system of camera lens includes along light incident direction
The third lens that the second lens group, the focal power that the first lens group, the focal power that the focal power set gradually is positive are negative are positive
The 4th lens group that group and focal power are positive, is provided with diaphragm piece on front side of the third lens group；First lens group is
First fixed group, second lens group is zoom group, and the third lens group fixes group after being, the 4th lens group is compensation
Group；First lens group is by the first crescent moon positive lens, the first bent moon negative lens, the second crescent moon positive lens, that set gradually
Two bent moon negative lenses and third crescent moon positive lens groups are at the first bent moon negative lens and the second crescent moon positive lens are glued at one
It rises, the second bent moon negative lens and third crescent moon positive lens are glued together；Second lens group by set gradually
Three bent moon negative lenses, the first double-concave negative lens, the first plano-convex positive lens and the 4th bent moon negative lens group are at first concave-concave is negative
Lens and the first plano-convex positive lens are glued together；The third lens group by set gradually the first biconvex positive lens, first
Bent moon positive lens, the second bent moon positive lens, the second double-concave negative lens and the second biconvex positive lens composition, second bent moon are just saturating
Mirror and the second double-concave negative lens are glued together；4th lens group by set gradually third bent moon positive lens, the 5th hope
Month negative lens and third biconvex positive lens composition, the third bent moon positive lens and the 5th full moon negative lens are glued together；Institute
State the focal length of the first lens groupMaximum clear aperture is, the focal length of the second lens groupMaximum clear aperture is, the
The focal length of three lens groupsMaximum clear aperture is, the focal length of the 4th lens groupMaximum clear aperture is, must be full
Sufficient the following conditions:,,,；
The second lens group moving range, the moving range of the 4th lens group, system overall length, meet the following conditions:,；First crescent moon positive lens, the second crescent moon positive lens and third crescent moon positive lens
It is all made of abnormal dispersion glass；The third bent moon negative lens, the first double-concave negative lens, the first plano-convex positive lens and the 4th bent moon
Negative lens is respectively high refracting glass, and refractive index is both greater than 1.85；The diaphragm piece is adjustable diaphragm；The mechanical knot of camera lens
Structure includes the body tube positioned at middle part, and focusing body tube, setting in the focusing body tube are provided on front side of the body tube
There is the preceding group lens barrel that can be moved forward and backward and for group fixed before installing, the interior forward end of the body tube is provided with to be become for installing
It times organizes and the zoom lens barrel that can be moved forward and backward, is provided in body tube for the rear group lens barrel organized fixed after install, body tube
Internal back end is provided with the compensation lens barrel that can be moved forward and backward and for installing compensation group, and the rear side of body tube is also equipped with diaphragm
, a diaphragm piece for fixed group front side after being located at is installed in the diaphragm seat.
2. compact high-resolution zoom lens according to claim 1, which is characterized in that the focusing body tube housing
It is equipped with focusing cam, focusing body tube side is provided with the focusing that focusing microswitch and focusing cam are driven by tooth engagement
Motor and adjusting potentiometer, described adjust have the focusing retaining screw matched with focusing microswitch, focusing cam on cam
On be additionally provided with and be connected with preceding group lens barrel across focusing cam and focusing body tube for driving preceding group lens barrel back-and-forth motion
Focusing guide pin component.
3. compact high-resolution zoom lens according to claim 2, which is characterized in that the focusing motor is through focusing
Motor rack is placed on focusing body tube, and the focusing microswitch is placed on focusing body tube through focusing limiting bracket, institute
It states and offers the uniformly distributed linear skewed slot of precision machined two 180o on focusing cam, and through focusing guide pin component and preceding group lens barrel
It links together, the gear of the focusing motor is engaged with the gear on focusing cam, is additionally provided with use in the preceding group lens barrel
In the straight trough that limitation preceding group lens barrel is rotated and only moved in a straight line.
4. according to right want 1,2 or 3 described in compact high-resolution zoom lens, which is characterized in that covered on the body tube
It is equipped with zoom cam, is provided in body tube and is moved with the zoom Mobile base for the cooperation that slides axially in the middle part of body tube and compensation
, the zoom cam drives zoom Mobile base and compensation Mobile base edge to move axially back and forth respectively through zoom guide pin and compensation guide pin
Dynamic, the zoom lens barrel is corresponding with compensation lens barrel to be installed on zoom Mobile base and compensation Mobile base；It is set positioned at body tube side
The zoom motor and zoom potentiometer for being equipped with zoom microswitch and being driven with zoom cam by tooth engagement, the zoom are convex
There is the zoom retaining screw matched with zoom microswitch on wheel.
5. according to right want 4 described in compact high-resolution zoom lens, which is characterized in that the front and back end of the zoom cam
It is separately provided for cooperatively forming the steel ball of rolling bearing between body tube, and the zoom being set in primary mirror tube rear end is convex
Take turns pressing ring locking；Zoom curved groove and compensated curve slot are provided on the zoom cam, it is described to have zoom curved groove and compensation
Curved groove respectively links together zoom cam and zoom Mobile base, compensation Mobile base through zoom guide pin and compensation guide pin；Institute
State zoom motor, zoom potentiometer is placed on body tube through zoom electric machine support, the zoom microswitch is limited through zoom
Switch frame is placed on body tube；The gear of zoom motor and zoom cam-engaged are provided with for limiting on the body tube
Zoom guide pin part and compensation guide pin simultaneously make the rotary motion of zoom Mobile base, compensation Mobile base become two moved along a straight line directly
Slot.
6. according to right want 1,2,3 or 5 described in compact high-resolution zoom lens, which is characterized in that the rear group lens barrel
The diaphragm rotating ring for being internally provided with the diaphragm rotating ring pressing plate matched and being equipped with diaphragm piece is provided on the downside of the diaphragm seat
Iris motor, the Iris motor is driven through tooth engagement to be connected with the aperture setting ring being placed on diaphragm seat, on diaphragm seat
It is additionally provided with the diaphragm microswitch for controlling diaphragm openings of sizes, is had and diaphragm microswitch on the aperture setting ring
The diaphragm retaining screw matched；The diaphragm microswitch is placed on diaphragm seat through diaphragm limiting bracket, and the diaphragm piece is through riveting
Nail connection is placed on diaphragm rotating ring, and the diaphragm rotating ring is dialled nail through diaphragm and connect with aperture setting ring, the diaphragm group follow closely with
Aperture setting ring rotary motion under the drive of Iris motor；The diaphragm rotating ring is with diaphragm retaining screw rotary motion, diaphragm fine motion
Switch and diaphragm retaining screw cooperating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563800.8A CN107193117B (en) | 2017-07-12 | 2017-07-12 | Compact high-resolution zoom lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710563800.8A CN107193117B (en) | 2017-07-12 | 2017-07-12 | Compact high-resolution zoom lens |
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| Publication Number | Publication Date |
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| CN107193117A CN107193117A (en) | 2017-09-22 |
| CN107193117B true CN107193117B (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710563800.8A Active CN107193117B (en) | 2017-07-12 | 2017-07-12 | Compact high-resolution zoom lens |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873275B (en) * | 2018-06-11 | 2020-12-29 | 青岛奥美克医疗科技有限公司 | Zoom adapter optical system, zoom adapter, and endoscope system |
| CN109725409B (en) * | 2019-01-29 | 2024-02-02 | 广东奥普特科技股份有限公司 | Telecentric lens |
| CN110187484B (en) * | 2019-05-30 | 2021-06-15 | 浙江大华技术股份有限公司 | Lens |
| CN110119023A (en) * | 2019-06-16 | 2019-08-13 | 福建福光股份有限公司 | 6000000 high-resolution zoom camera lenses |
| CN113406779B (en) * | 2020-03-16 | 2022-11-18 | 华为技术有限公司 | Zoom lens, camera module and mobile terminal |
| CN212111958U (en) * | 2020-03-20 | 2020-12-08 | 华为技术有限公司 | Zoom lens, camera module and terminal equipment |
| CN112099211B (en) * | 2020-09-27 | 2022-07-05 | 杭州海康威视数字技术股份有限公司 | Zoom optical system and image capturing apparatus |
| CN112666692B (en) * | 2020-12-22 | 2022-11-01 | 福建福光股份有限公司 | Large-zoom-ratio ultra-long-focal-length high-definition fog-penetrating lens and imaging method thereof |
| CN115166951A (en) * | 2022-06-30 | 2022-10-11 | 福建福光股份有限公司 | Two-variable fixed-focus lens with large relative aperture and compact structure |
| CN116047733B (en) * | 2022-12-20 | 2024-03-15 | 福建福光股份有限公司 | Zoom lens structure and working method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280864A (en) * | 2013-07-12 | 2015-01-14 | 富士胶片株式会社 | Zoom lens and imaging apparatus |
| CN104345435A (en) * | 2013-07-25 | 2015-02-11 | 扬明光学股份有限公司 | Zoom lens |
| CN106842527A (en) * | 2016-11-10 | 2017-06-13 | 嘉兴中润光学科技有限公司 | A kind of zoom lens |
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2017
- 2017-07-12 CN CN201710563800.8A patent/CN107193117B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280864A (en) * | 2013-07-12 | 2015-01-14 | 富士胶片株式会社 | Zoom lens and imaging apparatus |
| CN104345435A (en) * | 2013-07-25 | 2015-02-11 | 扬明光学股份有限公司 | Zoom lens |
| CN106842527A (en) * | 2016-11-10 | 2017-06-13 | 嘉兴中润光学科技有限公司 | A kind of zoom lens |
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|---|---|
| CN107193117A (en) | 2017-09-22 |
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