CN107193117A - compact high-resolution zoom lens - Google Patents

compact high-resolution zoom lens Download PDF

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Publication number
CN107193117A
CN107193117A CN201710563800.8A CN201710563800A CN107193117A CN 107193117 A CN107193117 A CN 107193117A CN 201710563800 A CN201710563800 A CN 201710563800A CN 107193117 A CN107193117 A CN 107193117A
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CN
China
Prior art keywords
lens
zoom
diaphragm
focusing
tube
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Granted
Application number
CN201710563800.8A
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Chinese (zh)
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CN107193117B (en
Inventor
周宝藏
肖维军
张新彬
钟兆铨
陶曾
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Fujian Forecam Optics Co Ltd
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Fujian Forecam Optics Co Ltd
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Priority to CN201710563800.8A priority Critical patent/CN107193117B/en
Publication of CN107193117A publication Critical patent/CN107193117A/en
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Publication of CN107193117B publication Critical patent/CN107193117B/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical 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
    • G02B15/16Optical 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
    • G02B15/163Optical 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
    • G02B15/167Optical 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
    • G02B15/173Optical 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 +-+

Abstract

The present invention relates to a kind of zoom lens, more particularly to a kind of compact high-resolution zoom lens, it is that the first positive lens group, focal power are that the second negative lens group, focal power are positive the 3rd lens group and focal power is the 4th positive lens group that the optical system of camera lens, which is included along the focal power that light incident direction is set gradually, and diaphragm piece is provided with front side of the 3rd lens group;First lens group is preceding fixed group, and second lens group is zoom group, and the 3rd lens group fixes group after being, the 4th lens group is compensation group.The compact high-resolution zoom lens not only compact conformation, and focal power distribution is reasonable, is conducive to the correction of aberration.

Description

Compact high-resolution zoom lens
Technical field
The present invention relates to a kind of zoom lens, more particularly to a kind of compact high-resolution zoom lens.
Background technology
With the development of engineering technology, zoom lens is always higher toward resolution ratio, and thang-kng amount 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, typically Using the combining form of "+-++ ", second group is zoom group, and the 3rd group is compensation group, is then contracted by the way of root is changed The size of mini system.When system dimension further shortens, the relative aperture of zoom group and compensation group can be caused excessive, it is 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 each Correction, therefore larger relative aperture is the basic reason that can not be further improved as matter, but to reduce for this structure The relative aperture of zoom group and compensation group, must just increase system dimension.Therefore transformation zoom and compensation way are needed.And navigate My god, airborne and carrier-borne etc. military equipment requires very strict to the weight and size of instrument, therefore is badly in need of a kind of compact high score Resolution zoom lens.
The content of the invention
It is an object of the invention to provide a kind of compact high-resolution zoom lens, not only compact conformation, and light focus Degree distribution is reasonable, 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 includes edge The focal power that light incident direction is set gradually is that the first positive lens group, focal power are that the second negative lens group, focal power are The 3rd positive lens group and focal power are the 4th positive lens group, and diaphragm piece is provided with front side of the 3rd lens group;It is described First lens group is preceding fixed group, and second lens group is zoom group, and the 3rd lens group fixes group, the described 4th after being Lens group is compensation group.
Further, first lens group is by the first crescent moon positive lens set gradually, the first bent moon negative lens, second Crescent moon positive lens, the second bent moon negative lens and the 3rd crescent moon positive lens groups are into 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 the 3rd crescent moon positive lens are glued together;Second lens group by The 3rd 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 into institute State the first double-concave negative lens and the first plano-convex positive lens is glued together;3rd 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 3rd bent moon that sets gradually just Lens, the 5th full moon negative lens and the 3rd biconvex positive lens composition, the 3rd 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 3rd lens groupMaximum clear aperture is, the focal length of the 4th lens groupMost Big clear aperture is, following condition must be met:,, ,;The second lens group moving range, the moving range of the 4th lens group, system overall length, meet following condition:,
Further, the 3rd 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 being provided with tune on front side of the body tube positioned at middle part, the body tube The preceding group of lens barrel that can be moved forward and backward and for installing preceding fixed group, the master are provided with burnt body tube, the focusing body tube The interior forward end of lens barrel, which is provided with the zoom lens barrel for installing zoom group and can move forward and backward, body tube, to be provided with for pacifying Rear group of lens barrel of fixed group after dress, the Internal back end of body tube is provided with the compensating glass that can be moved forward and backward and for installing compensation group Cylinder, the rear side of body tube be also equipped with diaphragm seat, the diaphragm seat be provided be located at after fix the diaphragm piece on front side of group.
Further, focusing cam is equipped with outside the focusing body tube, focusing body tube side is provided with focusing fine motion Switch, with focusing cam by the focusing motor of tooth engaged transmission and regulation potentiometer, have and tune on the regulation cam It is additionally provided with the focusing retaining screw that burnt microswitch is engaged, focusing cam through focusing cam and focusing body tube and preceding group of mirror Cylinder is connected for driving the movable focusing guide pin component of preceding group of lens barrel.
Further, the focusing motor is placed on focusing body tube through motor rack of focusing, the focusing microswitch It is placed on focusing body tube through limiting bracket of focusing, precision machined two 180o is offered on the focusing cam uniform Linear skewed slot, and linked together through guide pin component of focusing with preceding group of lens barrel, on the gear and focusing cam of the focusing motor Gear engagement, it is described before be additionally provided with for limiting the straight trough that preceding group of lens barrel rotates and only do to move along a straight line on group lens barrel.
Further, it is equipped with zoom cam, body tube and is provided with body tube middle part vertically on the body tube The zoom Mobile base and compensation Mobile base being slidably matched, the zoom cam drive zoom respectively through zoom guide pin and compensation guide pin Mobile base and compensation Mobile base move forward and backward vertically, the zoom lens barrel and compensation lens barrel it is corresponding be installed on zoom Mobile base with Compensate on Mobile base;Positioned at body tube side be provided with zoom microswitch and with change of the zoom cam by tooth engaged transmission There is the zoom retaining screw being engaged with zoom microswitch on times motor and zoom potentiometer, the zoom cam.
Further, it is separately provided for cooperatively forming the axis of rolling between the front and back end of the zoom cam and body tube The steel ball held, and the configured zoom cam trim ring locking in primary mirror tube rear end;Zoom curve is provided with the zoom cam Groove and compensated curve groove, it is described to have zoom curved groove and compensated curve groove respectively through zoom guide pin and compensation guide pin zoom cam Linked 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 It is provided with cam-engaged, 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 is changed into two straight troughs of linear motion.
Further, the rear group lens barrel is internally provided with the diaphragm rotating ring pressing plate being engaged and is provided with the light of diaphragm piece Late rotating ring, the downside of the diaphragm seat is provided with Iris motor, and the Iris motor is through tooth engaged transmission and is placed on diaphragm seat On aperture setting ring be connected, be additionally provided with diaphragm microswitch for controlling diaphragm openings of sizes on diaphragm seat, it is described There is the diaphragm retaining screw being engaged with diaphragm microswitch on aperture setting ring;The diaphragm microswitch is through diaphragm limiting bracket Be placed in diaphragm seat on, the diaphragm piece is placed on diaphragm rotating ring through rivet interlacement, the diaphragm rotating ring through diaphragm dial nail with Aperture setting ring is connected, and the diaphragm dials nail with aperture setting ring rotary motion under the drive of Iris motor;The diaphragm is moved Ring is with diaphragm retaining screw rotary motion, diaphragm microswitch and diaphragm retaining screw cooperating.
Compared with prior art, the present invention has advantages below:
The mechanical compensation structure that the present invention is moved using two, four constituent elements, i.e., first group is first fixed group, and second group is zoom group, 3rd group be after fix group, the 4th group is compensation group.This zoom form is different from traditional first fixed group, zoom group, compensation The zoom system, pancreatic system structure of group and rear fixed group, fixes thereafter group before compensation group, rear solid before light enters compensation group Fixed group by laser beam compression, can reduce the burden of compensation group, can so make the focal power reasonable distribution of system, be conducive to aberration Correction.For the mechanical compensation structure moved using two, four constituent elements, diaphragm is located at the 3rd lens group(Group is fixed afterwards)Front side, becomes Relative aperture can be changed when burnt, and the defect can be effectively solved using iris diaphgram.
Brief description of the drawings
Fig. 1 is the optical system diagram in focal length of the invention;
Fig. 2 is the optical system diagram in short focus of the invention;
Fig. 3 is the MTF in focal length of the invention;
Fig. 4 is the MTF in short focus of the invention.
Fig. 5 is the installation diagram of the camera lens of the present invention;
Fig. 6 is the sectional view of the camera lens of the present invention;
Fig. 7 is the structural representation of the focusing component of the present invention;
Fig. 8 is Fig. 7 of present invention left view;
Fig. 9 is the sectional view of the focusing component of the present invention;
Figure 10 is the structural representation of the variable focus package of the present invention;
Figure 11 is Figure 10 of present invention right view;
Figure 12 is the sectional view of the variable focus package of the present invention;
Figure 13 is the structural representation of the iris diaphgram component of the present invention;
Figure 14 is Figure 13 of present invention left view;
Figure 15 is the sectional view of the iris diaphgram component of the present invention;
In figure:The lens groups of A- first;A1- the first crescent moon positive lens;A2- the first bent moon negative lenses;A3- the second crescent moon positive lens; A4- the second bent moon negative lenses;The crescent moon positive lens of A5- the 3rd;
The lens groups of B- second;The bent moon negative lenses of B1- the 3rd;The double-concave negative lens of B2- first;B3- the first plano-convex positive lens;B4- Four bent moon negative lenses;
The lens groups of C- the 3rd;The biconvex positive lens of C1- first;The bent moon positive lens of C2- first;The bent moon positive lens of C3- second;C4- Two double-concave negative lens;The biconvex positive lens of C5- second;
The lens groups of D- the 4th;The bent moon positive lens of D1- the 3rd;The full moon negative lenses of D2- the 5th;The biconvex positive lens of D3- the 3rd;
51- focusing components;52- variable focus packages;53- iris diaphgram components;54- camera assemblies;
Trim ring is organized before 61-;62- focusing cam trim rings;63- focusing cams;64- focusing guide pin components;Lens barrel is organized before 65-;66- is adjusted Burnt potentiometer;67- focusing motors;68- focusing motor racks;The gear of 69- focusing motors;The gear of 610- focusing potentiometers; 611- microswitches;612- focusing limiting brackets;Spacer ring 2 is organized before 613-;Spacer ring 1 is organized before 614-;615- focusing body tubes;616- Linear skewed slot;
71- zoom trim rings;72- the first zoom spacer rings;73- zoom lens barrels;74- zoom Mobile bases;75- the second zoom spacer rings;76- Body tube;77- zoom cams;78- steel balls;79- zoom cam trim rings;710- compensates trim ring;711- compensates spacer ring;712- is compensated Lens barrel;713- compensates Mobile base;714- guide rods;715- cam covers;Adjust pad is organized before 716-;717- connect bases;718- Zoom potentiometer;719- zoom motors;720- zoom motor racks;721- zoom limiting brackets;722- microswitches;723- zooms Guide pin;724- zoom curved grooves;725- compensated curve grooves;
81- aperture setting ring ring trim rings;82- aperture setting rings;83- diaphragm retaining screws;84- diaphragms dial nail;Lens barrel is organized after 85-;86- Diaphragm seat;87- microswitches;88- diaphragm limiting brackets;89- Iris motor gears;810- Iris motor supports;811- diaphragms Trim ring;Spacer ring is organized after 812-;813- diaphragm rotating rings;814- diaphragm rotating ring pressing plates;815- Iris motors.
Embodiment
For the features described above and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing, make detailed Carefully it is 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 includes the light focus set gradually along light incident direction Degree is that the first positive lens group, focal power are that the second negative lens group, focal power are positive the 3rd lens group and focal power is just The 4th lens group, be provided with diaphragm piece on front side of the 3rd lens group;First lens group is preceding fixed group, described the Two lens groups are zoom group, and the 3rd 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 the 3rd crescent moon positive lens A5 compositions, 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 the 3rd crescent moon positive lens A5 are glued at one Rise;Second lens group is by the 3rd 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 compositions, the first double-concave negative lens B2 and the first plano-convex positive lens B3 are glued together;Institute The 3rd lens group is stated by the first biconvex positive lens C1 set gradually, the first bent moon positive lens C2, the second bent moon positive lens C3, Two double-concave negative lens C4 and the second biconvex positive lens C5 compositions, the second bent moon positive lens C3 and the second double-concave negative lens C4 glue It is combined;4th lens group by set gradually the 3rd bent moon positive lens D1, the 5th full moon negative lens D2 and the 3rd pair Convex positive lens D3 compositions, the 3rd 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 3rd lens groupMaximum clear aperture is, the focal length of the 4th lens group Maximum clear aperture is, following condition must be met:,,,;The second lens group moving range, the moving range of the 4th lens group, system overall length, Meet following condition:,
In the present embodiment, second order spectrum during in order to realize no thermalization and balance focal length, the first crescent moon positive lens A1, second Crescent moon positive lens A3 and the 3rd crescent moon positive lens A5 use abnormal dispersion glass.
In the present embodiment, in order to reduce the aberration of zoom group while controlling its length, the 3rd 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 Thang-kng amount, the diaphragm piece is adjustable diaphragm.
The technical indicator of the zoom lens is as follows:2/3 inch of image planes, pixel 5.5um is that MTF is more than in 110lp/mm 0.2, zooming range 11mm ~ 270mm, maximum distortion are less than 3%, and relative aperture is 1:5, -40 DEG C ~+60 DEG C of operating temperature, optics Overall length is less than 143mm.
In the present embodiment, the optical parametric scope 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, and the front side of the body tube is set Have in focusing body tube 615, the focusing body tube and be provided with the preceding group of lens barrel that can be moved forward and backward and for installing preceding fixed group 65, the interior forward end of the body tube is provided with the zoom lens barrel 73 for installing zoom group and can move forward and backward, body tube The rear group of lens barrel 85 for fixed group after installation is provided with, the Internal back end of body tube, which is provided with, can move forward and backward and for installing The compensation lens barrel 712 of compensation group, the rear side of body tube is also equipped with diaphragm seat 86, the diaphragm seat be provided with and be located at after Diaphragm piece on front side of fixed group.
In the present embodiment, focusing cam 63 is equipped with outside the focusing body tube, focusing body tube side is provided with focusing Microswitch 611 and focusing cam pass through the focusing motor 67 and regulation potentiometer 66 of tooth engaged transmission, the regulation cam Above with the focusing retaining screw being engaged with focusing microswitch, it is additionally provided with focusing cam through focusing cam and focusing primary mirror Cylinder is connected with preceding group of lens barrel for driving the movable focusing guide pin component 64 of preceding group of lens barrel.
In the present embodiment, the focusing motor 67 is placed on focusing body tube 615 through motor rack 68 of focusing, the focusing Microswitch 611 is placed on focusing body tube 615 through limiting bracket 612 of focusing, and precision is offered on the focusing cam 63 Linear skewed slot 616 uniform two 180o of processing, and linked together through guide pin component 64 of focusing with preceding group of lens barrel 65, it is described The gear 69 of focusing motor is engaged with the gear on focusing cam 63, is additionally provided with the preceding group lens barrel for limiting preceding group of mirror Cylinder rotates and only does the straight trough moved along a straight line.Rotated when focusing motor 67 is powered, driven and focused by the gear 69 for motor of focusing Cam 63 rotates, and is limited by the straight trough on preceding group of lens barrel 65, the rotation of preceding group of lens barrel 65 is limited, so as to only do in straight trough Linear motion, so as to realize the focusing function to far and near target, is exchanged by microswitch 611 and the collective effect for retaining screw of focusing Burnt cam 63 and focusing motor 611 play spacing 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, the gear 610 for adjusting potentiometer is engaged with adjusting cam 63, synchronous with tune Relative rotation occurs for burnt cam 63, and the resistance of potentiometer is changed, and potentiometer can be obtained by appropriate sample circuit Changing value, and control centre is transmitted to, so as to realize the display of focus value;Ordered conversely, providing respective resistance values by control centre Order, can be achieved the real-time control of focal length.
In the present embodiment, the body tube 75 is connected with connect base 717, and zoom cam is equipped with body tube 77, it is provided with body tube 75 and the zoom Mobile base 74 of the cooperation that slid axially in the middle part of body tube and compensates Mobile base 713, institute State zoom cam 77 and drive the front and rear shifting vertically of zoom Mobile base and compensation Mobile base respectively through zoom guide pin 723 and compensation guide pin Dynamic, the zoom lens barrel 73 and the compensation correspondence of lens barrel 712 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 passes through the zoom motor 719 of tooth engaged transmission and change with zoom cam 77 There is the zoom retaining screw being engaged with zoom microswitch on times potentiometer 718, the zoom cam.
In the present embodiment, steel ball 78 is respectively arranged between the front and back end of the zoom cam 77 and body tube, so as to become Times rolling bearing, the configured zoom cam trim ring 79 in primary mirror tube rear end of zoom cam are cooperatively formed between cam and body tube Locking;Zoom curved groove 724 and compensated curve groove 725 are provided with the zoom cam 77, it is described to have zoom curved groove and benefit Curved groove is repaid respectively to connect zoom cam 77 with 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 of zoom motor and zoom cam 77 Gear engagement, be provided with the body tube for limiting zoom guide pin part and compensation guide pin and making zoom Mobile base 74, benefit The rotary motion for repaying Mobile base 713 is changed into two straight troughs of linear motion.When the rotor of zoom motor 719 does positive and negative rotary motion It is to drive zoom cam 77 to do corresponding rotation, zoom is driven by zoom, compensated curve groove and zoom guide pin, compensation guide pin Mobile base 74, compensation Mobile base 713 are moved in the way of zoom, compensated curve groove, and two on body tube 75 straight trough plays limit Zoom guide pin part processed, the effect for compensating guide pin, and zoom Mobile base 74, the rotary motion of compensation Mobile base 713 is changed into straight line Motion;Strict control zoom guide pin component and compensation guide pin component and the straight line on the curved groove and body tube 75 of zoom cam 77 Fit clearance between groove, it is ensured that zoom component and compensation component slippage it is steady, without cassette tape.So realized and become by motor rotation Times lens barrel and compensation lens barrel are done linear motion back and forth by zoom motion equation requirement, so as 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 Be additionally provided with front side of the guide rod 714 of mobile guide, the body tube when being connected with preceding group of lens barrel be used to adjust therebetween away from From preceding group of adjust pad 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 the 3rd bent moon negative lens B1 It is located in trim ring 71, zoom lens barrel and the first zoom spacer ring is provided between the 3rd bent moon negative lens and the first double-concave negative lens B2 72, it is provided with the second zoom spacer ring 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 of institute compensation lens barrel is provided with for being pressed on the 3rd biconvex positive lens D1 rear end faces Compensate trim ring 710, compensation lens barrel in be located at be provided between the 5th full moon negative lens D2 and the 3rd biconvex positive lens D3 compensation every Circle 711.
In the present embodiment, the rear group lens barrel 85 is internally provided with the diaphragm rotating ring pressing plate 814 being engaged and is provided with light The diaphragm rotating ring 813 of late piece, the downside of the diaphragm seat is provided with Iris motor 815, and the Iris motor is through tooth engaged transmission 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 with diaphragm seat There is the diaphragm retaining screw 83 being engaged with diaphragm microswitch on late microswitch 87, 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 connected with aperture setting ring 82, and diaphragm rotating ring 813 drives diaphragm piece to rotate So as to control the change of aperture openings size, the change of Electronic control aperture size is realized;The diaphragm is dialled nail and adjusted with diaphragm The rotary motion under the drive of Iris motor 815 of ring 82;The diaphragm rotating ring 813 is with the rotary motion of diaphragm retaining screw 83, and diaphragm is micro- Dynamic switch 87 and the cooperating of diaphragm retaining screw 83, play the spacing and protective effect to system in zooming procedure.
In the present embodiment, it is located in the rear group lens barrel and is set between the 3rd bent moon positive lens D1 and the 5th full moon negative lens D2 Rear group of spacer ring is equipped with, to ensure airspace.
Presently preferred embodiments of the present invention is the foregoing is only, for the ordinary skill in the art, according to this hair Bright teaching, designs various forms of compact high-resolution zoom lens and does not need performing creative labour, do not departing from All equivalent changes made according to scope of the present invention patent, modification, replacement and change in the case of the principle and spirit of the present invention Type, should all belong to the covering scope of the present invention.

Claims (10)

1. a kind of compact high-resolution zoom lens, it is characterised in that the optical system of camera lens is included along light incident direction The focal power set gradually is that the first positive lens group, focal power are that the second negative lens group, focal power are the 3rd positive lens Group is the 4th positive lens group with focal power, and diaphragm piece is provided with front side of the 3rd lens group;First lens group is First fixed group, second lens group is zoom group, and the 3rd lens group fixes group after being, the 4th lens group is compensation Group.
2. compact high-resolution zoom lens according to claim 1, it is characterised in that first lens group by according to The first crescent moon positive lens, the first bent moon negative lens, the second crescent moon positive lens, the second bent moon negative lens and the 3rd crescent moon of secondary setting Positive lens groups into, the first bent moon negative lens and the second crescent moon positive lens are glued together, the second bent moon negative lens and 3rd crescent moon positive lens is glued together;Second lens group is born by the 3rd bent moon negative lens, the first concave-concave set gradually Lens, the first plano-convex positive lens and the 4th bent moon negative lens group are into first double-concave negative lens and the first plano-convex positive lens glue It is combined;3rd lens group is just saturating by the first biconvex positive lens set gradually, the first bent moon positive lens, the second bent moon Mirror, the second double-concave negative lens and the second biconvex positive lens composition, second bent moon positive lens and the second double-concave negative lens are glued Together;4th lens group is just saturating by the 3rd bent moon positive lens, the 5th full moon negative lens and the 3rd biconvex set gradually Microscope group is into the 3rd bent moon positive lens and the 5th full moon negative lens are glued together.
3. compact high-resolution zoom lens according to claim 1 or 2, it is characterised in that first lens group Focal lengthMaximum clear aperture is, the focal length of the second lens groupMaximum clear aperture is, Jiao of the 3rd lens group Away fromMaximum clear aperture is, the focal length of the 4th lens groupMaximum clear aperture is, following condition must be met:,,,;Described second is saturating Microscope group moving range, the moving range of the 4th lens group, system overall length, meet following condition:,
4. compact high-resolution zoom lens according to claim 2, it is characterised in that the 3rd bent moon is negative saturating Mirror, the first double-concave negative lens, the first plano-convex positive lens and the 4th bent moon negative lens are respectively high refracting glass, and refractive index is all big In 1.85;The diaphragm piece is adjustable diaphragm.
5. the compact high-resolution zoom lens according to claim 1,2 or 4, it is characterised in that the machinery knot of camera lens Structure, which includes being provided with front side of the body tube positioned at middle part, the body tube in focusing body tube, the focusing body tube, to be set There is the preceding group of lens barrel that can be moved forward and backward and for installing preceding fixed group, the interior forward end of the body tube is provided with for installing change The rear group of lens barrel for fixed group after installation is provided with the zoom lens barrel organized and can moved forward and backward again, body tube, 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 It is provided with seat, the diaphragm seat after being located at and fixes the diaphragm piece on front side of group.
6. compact high-resolution zoom lens according to claim 5, it is characterised in that the focusing body tube overcoat It is equipped with focusing cam, the focusing that focusing body tube side is provided with focusing microswitch, passes through tooth engaged transmission with focusing cam There is the focusing retaining screw being engaged with focusing microswitch, focusing cam on motor and regulation potentiometer, the regulation cam On be additionally provided with through focusing cam and focusing body tube be connected with preceding group of lens barrel for drive preceding group of lens barrel move forward and backward Focusing guide pin component.
7. compact high-resolution zoom lens according to claim 6, it is characterised 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 limiting bracket of focusing, institute State and the uniform linear skewed slots of precision machined two 180o are offered on focusing cam, and through guide pin component and the preceding group of lens barrel of focusing Link together, the gear of the focusing motor is engaged with the gear on focusing cam, use is additionally provided with the preceding group lens barrel Rotated in group lens barrel before limitation and only do the straight trough moved along a straight line.
8. the compact high-resolution zoom lens according to right wants 5,6 or 7, it is characterised in that covered on the body tube It is equipped with to be provided with zoom cam, body tube and is moved with the zoom Mobile base for the cooperation that slid axially in the middle part of body tube and compensation , the zoom cam drives the front and rear shifting vertically of zoom Mobile base and compensation Mobile base 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;Set positioned at body tube side Be equipped with zoom microswitch and with zoom motor and zoom potentiometer of the zoom cam by tooth engaged transmission, the zoom is convex There is the zoom retaining screw being engaged with zoom microswitch on wheel.
9. the compact high-resolution zoom lens according to right wants 8, it is characterised 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 configured zoom in primary mirror tube rear end is convex Take turns trim ring locking;Zoom curved groove and compensated curve groove are provided with the zoom cam, it is described to have zoom curved groove and compensation Curved groove links together zoom cam with zoom Mobile base, compensation Mobile base through zoom guide pin and compensation guide pin respectively;Institute State zoom motor, zoom potentiometer to be placed on body tube through zoom electric machine support, the zoom microswitch is spacing through zoom Switch frame is placed on body tube;It is provided with the gear of zoom motor and zoom cam-engaged, the body tube for limiting Zoom guide pin part and compensation guide pin and make zoom Mobile base, compensate Mobile base rotary motion be changed into two of linear motion it is straight Groove.
10. the compact high-resolution zoom lens according to right wants 5,6,7 or 9, it is characterised in that group lens barrel after described It is internally provided with the diaphragm rotating ring pressing plate being engaged and the diaphragm rotating ring of diaphragm piece is installed, the downside of the diaphragm seat is provided with Iris motor, the Iris motor is connected through tooth engaged transmission with the aperture setting ring being placed on diaphragm seat, on diaphragm seat Being additionally provided with the diaphragm microswitch for controlling diaphragm openings of sizes, the aperture setting ring has and diaphragm microswitch The diaphragm retaining screw being engaged;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 be connected 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.
CN201710563800.8A 2017-07-12 2017-07-12 Compact high-resolution zoom lens Active CN107193117B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108873275A (en) * 2018-06-11 2018-11-23 青岛奥美克医疗科技有限公司 Zoom adapter optical system, zoom adapter and endoscopic system
CN110119023A (en) * 2019-06-16 2019-08-13 福建福光股份有限公司 6000000 high-resolution zoom camera lenses
CN110187484A (en) * 2019-05-30 2019-08-30 浙江大华技术股份有限公司 A kind of camera lens

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108873275A (en) * 2018-06-11 2018-11-23 青岛奥美克医疗科技有限公司 Zoom adapter optical system, zoom adapter and endoscopic system
CN110187484A (en) * 2019-05-30 2019-08-30 浙江大华技术股份有限公司 A kind of camera 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

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