CN108873278A - High definition continuous magnification lens and its focus adjustment method with active temperature focusing function - Google Patents
High definition continuous magnification lens and its focus adjustment method with active temperature focusing function Download PDFInfo
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- CN108873278A CN108873278A CN201811036886.XA CN201811036886A CN108873278A CN 108873278 A CN108873278 A CN 108873278A CN 201811036886 A CN201811036886 A CN 201811036886A CN 108873278 A CN108873278 A CN 108873278A
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- 238000003825 pressing Methods 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 239000000470 constituent Substances 0.000 claims description 6
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- 125000006850 spacer group Chemical group 0.000 claims description 6
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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- Optics & Photonics (AREA)
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Abstract
The present invention relates to a kind of high definition continuous magnification lens with active temperature focusing function, the optical system of camera lens is successively arranged the rear fixed group E that the compensation group C, iris diaphgram D, focal power that the preceding fixed group A that focal power is positive, the zoom group B that focal power is negative, focal power be positive are positive；Preceding fixed group A is successively arranged the first gluing unit of biconvex lens A1, positive meniscus lens A2, diverging meniscus lens A3 and positive meniscus lens A4 contiguity；Zoom group B is successively arranged the second gluing unit of positive meniscus lens B1 and biconcave lens B2 contiguity, biconcave lens B3；Compensation group C is successively arranged the third gluing unit of biconvex lens C1, diverging meniscus lens C2 and biconvex lens C3 contiguity, positive meniscus lens C4；Fixed group E is successively arranged diverging meniscus lens E1, positive meniscus lens E2, plano-convex lens E3, diverging meniscus lens E4, biconvex lens E5 afterwards, has zoom closed loop control function, focusing closed loop control function, focal length feedback function and Video Out.
Description
Technical field
The present invention relates to a kind of high definition continuous magnification lens and its focus adjustment method with active temperature focusing function, belong to
Field of photoelectric technology.
Background technique
The horizontal promotion of International Technology confrontation, to airborne, vehicle-mounted detection system, more stringent requirements are proposed, is especially embodied in
Not only high-definition image is needed to export, it is also necessary to which cell is searched for and made to the panorama that can make the small multiplying power in big region to target
The amplifying observation of the big multiplying power in domain；Due to application environment multiplicity, it is also necessary to can rapid answer external environment variation, compensation temperature effect
The influence answered.Traditional conventional zoom relies on Power focus, the influence of compensation temperature effect away from camera lens, and delay of response is focusing
Target Continuous can not be observed before clear, monitoring, or even target can be lost.It therefore must be on basis of the traditional zoom away from camera lens
On, change mentality of designing, Curve guide impeller method is allowed to adapt to increasingly harsh environmental change, promotes scientific and technological antagonism.
Summary of the invention
The purpose of the present invention is places against the above deficiency, and providing a kind of structure, simply there is active temperature to focus function
The high definition continuous magnification lens and its focus adjustment method of energy.
The technical scheme is that a kind of high definition continuous magnification lens with active temperature focusing function, the mirror
The zoom that the optical system of head is negative along light direction is successively arranged that focal power is positive from left to right preceding fixed group A, focal power
Organize the rear fixed group E that B, the compensation group C that focal power is positive, iris diaphgram D, focal power are positive；Fixed group A is successively arranged before described
The first gluing unit of biconvex lens A1, positive meniscus lens A2, diverging meniscus lens A3 and positive meniscus lens A4 contiguity；The zoom group
B is successively arranged the second gluing unit of positive meniscus lens B1 and biconcave lens B2 contiguity, biconcave lens B3；The compensation group C is successively
Third gluing unit, positive meniscus lens C4 equipped with biconvex lens C1, diverging meniscus lens C2 and biconvex lens C3 contiguity；It is solid after described
Surely group E is successively arranged diverging meniscus lens E1, positive meniscus lens E2, plano-convex lens E3, diverging meniscus lens E4, biconvex lens E5.
Further, the airspace between the preceding fixed group A and zoom group B is 4~82.01mm, zoom group B and benefit
Repaying the airspace between group C is 114.66~2.2 mm, the airspace between compensation group C and rear fixed group E is 2.005~
36.45mm。
Further, the airspace of biconvex lens A1 and positive meniscus lens A2 is 0.2mm in the preceding fixed group A, just
The airspace of meniscus lens A2 and the first gluing unit is 1.7mm；Second gluing unit and biconcave lens B3 in the zoom group B
Airspace is 4.44mm；The airspace of biconvex lens C1 and third gluing unit is 0.2mm, third glue in the compensation group C
Being combined with the airspace of positive meniscus lens C4 is 0.1mm；Diverging meniscus lens E1 and positive meniscus lens E2 in fixed group E after described
Airspace be the airspace of 0.1mm, positive meniscus lens E2 and plano-convex lens E3 be 27.5mm, plano-convex lens E3 and bear curved
The airspace of moon lens E4 is that the airspace of 3.75mm, diverging meniscus lens E4 and biconvex lens E5 are 18.4mm.
Further, the mechanical structure of the camera lens successively includes focusing component, zoom component, compensation component, cam set
Part, iris diaphgram component, rear fixation kit, camera assembly；Fixed group A is set in focusing component before described, the zoom group B
In zoom component, the compensation group C is set in compensation component, and the rear fixed group E is set on iris diaphgram component and solid afterwards
Determine in component, iris diaphgram built in the iris diaphgram component, camera lens outer wall includes sealing structure.
Further, the focusing component is to use A1 piece pressing ring by biconvex lens A1, positive meniscus lens A2, the first gluing unit
It is placed in preceding group lens barrel respectively, A1 and A2 spacer ring, positive meniscus lens A2 is equipped between biconvex lens A1 and positive meniscus lens A2
A2 and the first gluing unit spacer ring are equipped between the first gluing unit, the preceding group lens barrel is installed in focusing body tube；The tune
The straight trough of uniformly distributed three 120o on burnt body tube, focusing cam are installed on the outside of focusing body tube, and focusing cam passes through three 120
O uniformly distributed linear skewed slot, with focusing guide pin component placement on focusing body tube；Focusing motor, focusing potentiometer, focusing primary mirror
Cylinder, focusing cam, microswitch form electric focusing mechanism, and the focusing motor, focusing potentiometer pass through focusing motor rack peace
It sets on focusing body tube, the microswitch is placed on focusing body tube by limiting bracket of focusing, motor gear and tune
Gear engagement on burnt cam drives focusing cam rotation by motor gear, is led by focusing when focusing electrical power rotation
Straight trough limitation on lens barrel, the rotation of preceding group lens barrel is by limitation so that the linear motion in straight trough is only done, to realize to distance
The focusing function of target；When focusing cam makes rotating motion, synchronous occurs opposite rotation with focusing potentiometer gear, makes
The resistance value of potentiometer changes, and the changing value of potentiometer can be found out by sample circuit appropriate, and is transmitted to control centre,
To realize the display of focusing value；Conversely, providing respective resistance values order by control centre, it can be achieved that the real-time control focused；
Focusing banking pin is placed on focusing cam, follows the rotation of focusing cam, passes through microswitch and the common of banking pin of focusing
Act on the limit and protective effect to focusing cam to corner.
Further, zoom lens barrel is placed in composition zoom component on zoom balladeur train by attachment screw；It is logical to compensate lens barrel
Cross attachment screw be placed in compensation balladeur train on form compensation component；The zoom balladeur train is with compensation balladeur train by grinding with body tube
Cooperation is placed in body tube, and zoom cam is placed in body tube by steel ball and forms rolling bearing, is locked by zoom cam pressing ring；
The zoom cam processes zoom, compensated curve slot by the requirement of the optical zoom equation of motion, respectively with zoom guide pin component and
Compensation guide pin component links together zoom cam and zoom balladeur train, compensation balladeur train；Zoom motor, zoom potentiometer, fine motion
Switch composition power zoom mechanism, zoom motor are placed on body tube by zoom electric machine support, and zoom potentiometer passes through change
Times potentiometer support is placed on body tube, and microswitch is placed on body tube by zoom limit switch frame；Zoom gear
It drives zoom cam to correspondingly rotate when zoom rotor does positive and negative rotary motion with zoom cam-engaged, passes through change
Again, compensated curve slot and zoom guide pin component, compensation guide pin component drive zoom balladeur train, compensation balladeur train to press zoom, compensated curve
The mode of slot moves, and two on body tube straight trough plays the role of limiting zoom guide pin component, compensation guide pin component, and makes to become
Times balladeur train, the rotary motion for compensating balladeur train become moving along a straight line；Strict control zoom guide pin component and compensation guide pin component and change
The fit clearance between straight-line groove on the curved groove and body tube of times cam guarantees that zoom component and compensation component sliding are flat
Surely, without cassette tape；It is rotated by motor and realizes that zoom component and compensation component are done straight line back and forth by zoom motion equation requirement and transported
Dynamic, to realize the consecutive variations function of system focal length, when the focal length of system changes, zoom gear is nibbled with zoom cam
It closes, synchronous occurs opposite rotation with zoom potentiometer gear, so that the resistance value of potentiometer is changed, passes through sampling appropriate
Circuit can find out the changing value of potentiometer, and be transmitted to control centre, to realize the display of zoom value；Conversely, passing through control
Center provide respective resistance values order, it can be achieved that focal length real-time control；Microswitch is played by zoom banking pin cooperating
Limit and protective effect to system in zooming procedure；Temperature control panel, which is connected through a screw thread, to be fixed on body tube, Ke Yishi
When monitor temperature change.
Further, the rear fixed group E is set in iris diaphgram component and rear fixation kit, the iris diaphgram component
Built-in iris diaphgram, the iris diaphgram component include Iris motor and the microswitch for controlling diaphragm openings of sizes position
Composition, shown microswitch are placed on diaphragm seat by diaphragm limiting bracket, and the diaphragm piece is placed in by rivet interlacement
On diaphragm rotating ring and diaphragm seat, the Iris motor is placed on diaphragm seat by Iris motor frame, is filled on the Iris motor
There is Iris motor gear, aperture setting ring rotation, the diaphragm are driven after engaging by diaphragm third wheel with aperture setting ring gear
It adjusts ring to be locked on diaphragm seat by aperture setting ring pressing ring, the aperture setting ring passes through the diaphragm that is placed on diaphragm rotating ring
It dials nail and drives the rotation of diaphragm rotating ring, the diaphragm rotating ring is locked in diaphragm seat by diaphragm rotating ring pressing ring, the diaphragm rotating ring band
Dynamic diaphragm piece rotates to control the variation of aperture openings size, realizes the variation of Electronic control aperture size；The diaphragm electricity
Machine gear is engaged by diaphragm third wheel with aperture setting ring, and diaphragm potentiometer is fixed on diaphragm seat using diaphragm potentiometer support
On, diaphragm potentiometer is engaged by diaphragm potentiometer gear with aperture setting ring gear, when Iris motor rotation, Iris motor
Gear drives light bar to adjust ring generation and correspondingly rotates by diaphragm third wheel, thus realize the display of stop opening size, it is synchronous
Opposite rotation occurs with diaphragm potentiometer gear, so that the resistance value of potentiometer is changed, can by sample circuit appropriate
To find out the changing value of potentiometer, and it is transmitted to control centre, to realize the display to aperture openings size；Conversely, passing through control
Center processed provide respective resistance values order, it can be achieved that focal length real-time control；Auxiliary support plate, which is connected through a screw thread, is fixed on sealing
In component.
Further, the sealing structure is made of mirror cover, preceding screening glass, front shroud cylinder, middle cover cylinder, ring flange, back cover cylinder,
Preceding screening glass is fixed in front shroud cylinder by preceding screening glass pressing ring, and front shroud cylinder is locked at middle cover cylinder by hexagon socket cap head screw
On, ring flange is locked on middle cover cylinder by hexagon socket cap head screw, and back cover cylinder is locked at flange by hexagon socket cap head screw
On disk.
A kind of focus adjustment method of the high definition continuous magnification lens with active temperature focusing function, carries out according to the following steps：
Camera lens uses first fixed group（﹢）, zoom group（﹣）, compensation group（﹢）, afterwards fix group（﹢）The structure of four constituent elements, zoom group front and back
When mobile, compensation group is mobile to guarantee that image planes are constant simultaneously, this process realizes the variation of lens focus；Pass through reasonable distribution
The focal power of four constituent elements makes camera lens have longer focal length under lesser length dimension.
Compared with prior art, the invention has the advantages that：The present invention has zoom closed-loop control function
Can, focusing closed loop control function, focal length feedback function and Video Out；Ambient temperature variation can be detected simultaneously,
And active response is quickly made, influence of the compensation temperature to image quality.
Detailed description of the invention
The invention patent is further illustrated with reference to the accompanying drawing.
Fig. 1 is light channel structure schematic diagram of the invention.
MTF when Fig. 2 is focal length.
MTF when Fig. 3 is short focus.
Fig. 4 is the total schematic diagram of mechanical structure；
Fig. 5 is the structural schematic diagram one of focusing component；
Fig. 6 is the structural schematic diagram two of focusing component；
Fig. 7 is the structural schematic diagram one of zoom component and compensation component；
Fig. 8 is the structural schematic diagram two of zoom component and compensation component；
Fig. 9 is the structural schematic diagram one of iris diaphgram component；
Figure 10 is the structural schematic diagram two of iris diaphgram component；
Figure 11 is the structural schematic diagram of sealing structure；
In figure：Fixed group A before A-；B- zoom group B；C- compensation group C；D- iris diaphgram D；Fixed group E after E-；A1- biconvex lens
A1；A2- positive meniscus lens A2；A3- diverging meniscus lens A3；A4- positive meniscus lens A4；B1- positive meniscus lens B1；B2- concave-concave is saturating
Mirror B2；B3- biconcave lens B3；C1- biconvex lens C1；C2- diverging meniscus lens C2；C3- biconvex lens C3；C4- positive meniscus lens
C4；E1- diverging meniscus lens E1；E2- positive meniscus lens E2；E3- plano-convex lens E3；E4- diverging meniscus lens E4；E5- biconvex lens
E5。
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in Fig. 1~11, a kind of high definition continuous magnification lens with active temperature focusing function, the light of the camera lens
Zoom group B, the light that system is negative along light direction is successively arranged that focal power is positive from left to right preceding fixed group A, focal power
The rear fixed group E that compensation group C that focal power is positive, iris diaphgram D, focal power are positive；Fixed group A is successively arranged lenticular before described
The first gluing unit of mirror A1, positive meniscus lens A2, diverging meniscus lens A3 and positive meniscus lens A4 contiguity；The zoom group B is successively
The second gluing unit, biconcave lens B3 equipped with positive meniscus lens B1 and biconcave lens B2 contiguity；The compensation group C is successively arranged double
The third gluing unit of convex lens C1, diverging meniscus lens C2 and biconvex lens C3 contiguity, positive meniscus lens C4；Fixed group E after described
It is successively arranged diverging meniscus lens E1, positive meniscus lens E2, plano-convex lens E3, diverging meniscus lens E4, biconvex lens E5.
In the present embodiment, the airspace between the preceding fixed group A and zoom group B is 4~82.01mm, zoom group B
Airspace between compensation group C is 114.66~2.2 mm, and the airspace between compensation group C and rear fixed group E is
2.005~36.45mm.
In the present embodiment, biconvex lens A1 and the airspace of positive meniscus lens A2 are in the preceding fixed group A
The airspace of 0.2mm, positive meniscus lens A2 and the first gluing unit is 1.7mm；Second gluing unit and concave-concave in the zoom group B
The airspace of lens B3 is 4.44mm；The airspace of biconvex lens C1 and third gluing unit is in the compensation group C
The airspace of 0.2mm, third gluing unit and positive meniscus lens C4 are 0.1mm；After described in fixed group E diverging meniscus lens E1 and
The airspace of positive meniscus lens E2 is that the airspace of 0.1mm, positive meniscus lens E2 and plano-convex lens E3 are 27.5mm, plano-convex
The airspace of lens E3 and diverging meniscus lens E4 are that the airspace of 3.75mm, diverging meniscus lens E4 and biconvex lens E5 are
18.4mm。
In the present embodiment, the mechanical structure of the camera lens successively includes focusing component 41, zoom component 42, compensation component
43, cam pack 44, iris diaphgram component 45, rear fixation kit 46, camera assembly 47；Fixed group A is set to focusing before described
In component 41, the zoom group B is set in zoom component 42, and the compensation group C is set in compensation component 43, fixed group after described
E is set in iris diaphgram component 45 and rear fixation kit 46, iris diaphgram built in the iris diaphgram component 45, camera lens outer wall packet
Include sealing structure 48.
In the present embodiment, the focusing component 41 is with A1 piece pressing ring 51 by biconvex lens A1, positive meniscus lens A2, the
One gluing unit is placed in respectively in preceding group lens barrel 52, A1 and A2 spacer ring 510 is equipped between biconvex lens A1 and positive meniscus lens A2,
A2 and the first gluing unit spacer ring 58 are equipped between positive meniscus lens A2 and the first gluing unit, the preceding group lens barrel 52 is installed on focusing
In body tube 54；The straight trough of uniformly distributed three 120o, focusing cam 55 are installed on focusing body tube 54 on the focusing body tube 54
Outside, the linear skewed slot uniformly distributed by three 120o of focusing cam 55 are placed in focusing body tube 54 with focusing guide pin component 53
On；Focusing motor 515, focusing potentiometer 517, focusing body tube 54, focusing cam 55, microswitch 512 form electromotion focusing
Mechanism, the focusing motor 515, focusing potentiometer 517 are placed on focusing body tube 54 by motor rack 514 of focusing, described
Microswitch 512 is placed on focusing body tube 54 by limiting bracket 513 of focusing, on motor gear 516 and focusing cam 55
Gear engagement, when focusing motor 515 be powered rotation, by motor gear 516 drive focusing cam 55 rotate, pass through focusing master
Straight trough limitation on lens barrel 54, the rotation of preceding group lens barrel 52 is by limitation so that the linear motion in straight trough is only done, thus realization pair
The focusing function of far and near target；When focusing cam 55 makes rotating motion, synchronous occurs relatively with focusing potentiometer gear 518
Rotation, so that the resistance value of potentiometer is changed, the changing value of potentiometer can be found out by sample circuit appropriate, and be transmitted to
Control centre, to realize the display of focusing value；Conversely, respective resistance values order is provided by control centre, it can be achieved that focusing
Real-time control；Focusing banking pin be placed on focusing cam 55, follow the rotation of focusing cam 55, by microswitch 512 with
The collective effect of focusing banking pin arrives the limit and protective effect of corner to focusing cam 55.
In the present embodiment, zoom lens barrel 62 is placed in composition zoom component 42 on zoom balladeur train 63 by attachment screw；
Compensation lens barrel 69 is placed on compensation balladeur train 611 by attachment screw and forms compensation component 43；The zoom balladeur train 63 and compensation
For balladeur train 611 by being placed in body tube 66 with the grinding cooperation of body tube 66, zoom cam 65 is placed in body tube by steel ball 67
66 composition rolling bearings, are locked by zoom cam pressing ring 68；The zoom cam 65 is added by the requirement of the optical zoom equation of motion
Work zoom, compensated curve slot, respectively with zoom guide pin component 64 and compensation guide pin component 612 zoom cam 65 and zoom balladeur train
63, compensation balladeur train 611 links together；Zoom motor 618, zoom potentiometer 616, microswitch 615 form power zoom machine
Structure, zoom motor 618 are placed on body tube 66 by zoom electric machine support 620, and zoom potentiometer 616 passes through zoom potentiometer
Bracket 620 is placed on body tube 66, and microswitch 615 is placed on body tube 66 by zoom limit switch frame 614；Zoom
Gear 619 is engaged with zoom cam 65, when 618 rotor of zoom motor does positive and negative rotary motion, zoom cam 65 is driven to do phase
The rotation answered drives zoom balladeur train 63 by zoom, compensated curve slot and zoom guide pin component 64, compensation guide pin component 612, mends
It repays balladeur train 611 to move in the way of zoom, compensated curve slot, two on body tube 66 straight trough plays limitation zoom guide pin component
64, the effect of guide pin component 612 is compensated, and the rotary motion of zoom balladeur train 63, compensation balladeur train 611 is made to become moving along a straight line；Sternly
Lattice control zoom guide pin component 64 and compensate guide pin component 612 and the straight-line groove on the curved groove and body tube 66 of zoom cam 65
Between fit clearance, guarantee zoom component 43 and compensation component 45 slide it is steady, without cassette tape；It is rotated by motor and realizes zoom
Component 43 and compensation component 45 do linear motion back and forth by zoom motion equation requirement, to realize the continuous change of system focal length
Change function, when the focal length of system changes, zoom gear 619 is engaged with zoom cam 65, synchronization with zoom potentiometer
Opposite rotation occurs for gear 617, and the resistance value of potentiometer is made to change, and can find out potentiometer by sample circuit appropriate
Changing value, and control centre is transmitted to, to realize the display of zoom value；Conversely, providing respective resistance values life by control centre
Enable the real-time control, it can be achieved that focal length；Microswitch 615 is played by 613 cooperating of zoom banking pin in zooming procedure
The limit and protective effect of system；Temperature control panel 621, which is connected through a screw thread, to be fixed on body tube 66, can monitor temperature in real time
Degree variation.
In the present embodiment, the rear fixed group E is set in iris diaphgram component 45 and rear fixation kit 46, described variable
Iris diaphgram built in diaphragm component 45, the iris diaphgram component 45 include Iris motor 722 and are open greatly for controlling diaphragm
The microswitch 719 of small position forms, and shown microswitch 719 is placed on diaphragm seat 71 by diaphragm limiting bracket 718, institute
It states diaphragm piece to be placed on diaphragm rotating ring 713 and diaphragm seat 71 by rivet interlacement, the Iris motor 722 passes through Iris motor
Frame 721 is placed on diaphragm seat 71, on the Iris motor 722 be equipped with Iris motor gear 723, by diaphragm third wheel 725 with
Aperture setting ring 73 is driven to rotate after the engagement of 73 gear of aperture setting ring, the aperture setting ring 73 is by aperture setting ring pressing ring 74
It is locked on diaphragm seat 71, the aperture setting ring 73 dials nail by the diaphragm being placed on diaphragm rotating ring 713 and drives diaphragm dynamic
Ring 713 rotates, and the diaphragm rotating ring 713 is locked in diaphragm seat 71 by diaphragm rotating ring pressing ring 72, and the diaphragm rotating ring 713 drives
Diaphragm piece rotates to control the variation of aperture openings size, realizes the variation of Electronic control aperture size；The Iris motor
Gear 723 is engaged by diaphragm third wheel with aperture setting ring 74, and diaphragm potentiometer 726 is fixed using diaphragm potentiometer support 728
In on diaphragm seat 71, diaphragm potentiometer 726 is engaged by diaphragm potentiometer gear 727 with 73 gear of aperture setting ring, works as diaphragm
When motor 722 rotates, Iris motor gear 723 drives light bar to adjust the generation of ring 73 and correspondingly rotates by diaphragm third wheel, thus
Realize the display of stop opening size, synchronous occurs opposite rotation with diaphragm potentiometer gear 727, makes the resistance value of potentiometer
It changes, the changing value of potentiometer can be found out by sample circuit appropriate, and be transmitted to control centre, to realize to light
Enclose the display of openings of sizes；Conversely, respective resistance values order is provided by control centre, it can be achieved that focal length real-time control；Auxiliary
Support plate 720, which is connected through a screw thread, to be fixed in seal assembly.
In the present embodiment, the sealing structure 48 is by mirror cover 81, preceding screening glass 83, front shroud cylinder 84, middle cover cylinder 85, flange
Disk 86, back cover cylinder 87 form, and preceding screening glass 83 is fixed in front shroud cylinder 84 by preceding screening glass pressing ring 82, and front shroud cylinder 84 is by interior six
Angle fillister head screw is locked on middle cover cylinder 85, and ring flange 86 is locked on middle cover cylinder 85 by hexagon socket cap head screw, back cover
Cylinder 87 is locked on ring flange 86 by hexagon socket cap head screw.
In the present embodiment, following optical index has been reached by the optical system that above-mentioned lens set is constituted：
1, focal length：50mm~500mm；
2, field angle：1.4 °~14 °；
3, relative aperture：D/f ' is greater than 1/4.5；
4, optical transfer function：When transmission function spatial frequency 90lp/mm, center MTF >=0.6 when focal length, short focus is regarded in maximum
Field still has good image quality, peripheral field MTF >=0.4；
5, optics overall length is less than 335mm；
6, encircled energy：In complete burnt section, 85% energy is concentrated within the scope of 11 μm of hot spots of Φ.
In the present embodiment, the parameter of each eyeglass is as shown in the table：
A kind of focus adjustment method of the high definition continuous magnification lens with active temperature focusing function, carries out according to the following steps：Camera lens
Using first fixed group（﹢）, zoom group（﹣）, compensation group（﹢）, afterwards fix group（﹢）The structure of four constituent elements, zoom group are moved forward and backward
When, compensation group is mobile to guarantee that image planes are constant simultaneously, this process realizes the variation of lens focus；Pass through reasonable distribution four
The focal power of constituent element makes camera lens have longer focal length under lesser length dimension.
To pursue higher resolution ratio, when optical design, makes preceding group suitably to complicate, using four chip architectures, improve light
The focal power ability to take the burden of fixed group A before line height is highest, and a piece of ultra-low dispersion glass is used, significantly reduce optics
The aberrations such as camera lens second order spectrum significantly improve the resolution ratio of camera lens.
Since temperature change causes the minor change of chemical parameters, the optimal focal plane of camera lens is caused to shift, reduce at
Image quality amount, that embodies in long focal length lens is especially apparent.Therefore increase active temperature focusing function, make optical system compared with
In big range of temperature retention property stablize, can guarantee in this way optical system image quality and lasting monitoring energy
Power.
According to the design of optical lens, under equidistant, in certain range of temperature, temperature and focus-compensating
The relation curve of amount is can to carry out quantitative expression with function expression, so our design parameters according to optical lens, knot
Fine tuning when practical application is closed, obtains curve representation formula, and convert it to the table of comparisons, the temperature measured by temperature sensor
Degree, by tabling look-up, obtains focus-compensating amount, and control focus motor and move to corresponding position.
Temperature sensor is added in camera lens suitable position, temperature change is monitored in real time, quickly environmental change is responded,
Greatly shorten the time of Power focus.
Above-listed preferred embodiment, has been further described the object, technical solutions and advantages of the present invention, is answered
Understand, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of high definition continuous magnification lens with active temperature focusing function, it is characterised in that：The optical system of the camera lens
It unites and organizes A, the zoom group B that focal power is negative, focal power along the light preceding fixation that direction is successively arranged that focal power is positive from left to right
The rear fixed group E that the compensation group C that is positive, iris diaphgram D, focal power are positive；Fixed group A is successively arranged biconvex lens before described
The first gluing unit of A1, positive meniscus lens A2, diverging meniscus lens A3 and positive meniscus lens A4 contiguity；The zoom group B is successively set
There are the second gluing unit, the biconcave lens B3 of positive meniscus lens B1 and biconcave lens B2 contiguity；The compensation group C is successively arranged biconvex
The third gluing unit of lens C1, diverging meniscus lens C2 and biconvex lens C3 contiguity, positive meniscus lens C4；After described fixed group E according to
It is secondary to be equipped with diverging meniscus lens E1, positive meniscus lens E2, plano-convex lens E3, diverging meniscus lens E4, biconvex lens E5.
2. the high definition continuous magnification lens according to claim 1 with active temperature focusing function, it is characterised in that：
Airspace before described between fixed group A and zoom group B is 4~82.01mm, between the air between zoom group B and compensation group C
Every being 114.66~2.2 mm, the airspace between compensation group C and rear fixed group E is 2.005~36.45mm.
3. the high definition continuous magnification lens according to claim 1 with active temperature focusing function, it is characterised in that：Institute
The airspace of biconvex lens A1 and positive meniscus lens A2 is 0.2mm in fixed group A before stating, and positive meniscus lens A2 and first is glued
The airspace of group is 1.7mm；The airspace of the second gluing unit and biconcave lens B3 are 4.44mm in the zoom group B；Institute
Stating the airspace of biconvex lens C1 and third gluing unit in compensation group C is 0.2mm, third gluing unit and positive meniscus lens C4's
Airspace is 0.1mm；The airspace of diverging meniscus lens E1 and positive meniscus lens E2 are 0.1mm in fixed group E after described, just
The airspace of meniscus lens E2 and plano-convex lens E3 are that the airspace of 27.5mm, plano-convex lens E3 and diverging meniscus lens E4 are
The airspace of 3.75mm, diverging meniscus lens E4 and biconvex lens E5 are 18.4mm.
4. the high definition continuous magnification lens according to claim 1 with active temperature focusing function, it is characterised in that：Institute
The mechanical structure for stating camera lens successively includes focusing component, zoom component, compensation component, cam pack, iris diaphgram component, consolidates afterwards
Determine component, camera assembly；Fixed group A is set in focusing component before described, and the zoom group B is set in zoom component, described
Compensation group C is set in compensation component, and fixed group E is set in iris diaphgram component and rear fixation kit after described, it is described can darkening
Iris diaphgram built in late component, camera lens outer wall include sealing structure.
5. the high definition continuous magnification lens according to claim 4 with active temperature focusing function, it is characterised in that：Institute
Stating focusing component is that biconvex lens A1, positive meniscus lens A2, the first gluing unit are placed in preceding group lens barrel respectively with A1 piece pressing ring
It is interior, it is equipped with A1 and A2 spacer ring between biconvex lens A1 and positive meniscus lens A2, is set between positive meniscus lens A2 and the first gluing unit
There are A2 and the first gluing unit spacer ring, the preceding group lens barrel is installed in focusing body tube；It is three uniformly distributed on the focusing body tube
The straight trough of 120o, focusing cam are installed on the outside of focusing body tube, and the focusing cam linear skewed slot uniformly distributed by three 120o is used
Guide pin component placement focus on focusing body tube；Focusing motor, focusing potentiometer, focusing body tube, focusing cam, fine motion are opened
Composition electric focusing mechanism is closed, the focusing motor, focusing potentiometer are placed on focusing body tube by motor rack of focusing, institute
Microswitch to be stated to be placed on focusing body tube by limiting bracket of focusing, motor gear is engaged with the gear on focusing cam,
When focusing electrical power rotation, focusing cam rotation is driven by motor gear, is limited by the straight trough on focusing body tube, it is preceding
The rotation of group lens barrel is by limitation so that the linear motion in straight trough is only done, to realize the focusing function to far and near target；Work as tune
When burnt cam makes rotating motion, synchronous occurs opposite rotation with focusing potentiometer gear, becomes the resistance value of potentiometer
Change, the changing value of potentiometer can be found out by sample circuit appropriate, and be transmitted to control centre, to realize the aobvious of focusing value
Show；Conversely, providing respective resistance values order by control centre, it can be achieved that the real-time control focused；Focusing banking pin is placed in tune
On burnt cam, follow the rotation of focusing cam, by microswitch and focusing banking pin collective effect to focusing cam to turn
The limit and protective effect at angle.
6. the high definition continuous magnification lens according to claim 4 with active temperature focusing function, it is characterised in that：Become
Times lens barrel is placed in composition zoom component on zoom balladeur train by attachment screw；It compensates lens barrel and compensation is placed in by attachment screw
Compensation component is formed on balladeur train；The zoom balladeur train and compensation balladeur train are placed in body tube by cooperating with body tube grinding,
Zoom cam is placed in body tube by steel ball and forms rolling bearing, is locked by zoom cam pressing ring；The zoom cam presses optics
Zoom, compensated curve slot are processed in the requirement of zoom motion equation, respectively with zoom guide pin component and compensation guide pin component zoom
Cam links together with zoom balladeur train, compensation balladeur train；Zoom motor, zoom potentiometer, microswitch form power zoom machine
Structure, zoom motor are placed on body tube by zoom electric machine support, and zoom potentiometer is placed in by zoom potentiometer support
On body tube, microswitch is placed on body tube by zoom limit switch frame；Zoom gear and zoom cam-engaged, work as change
When times rotor does positive and negative rotary motion, drives zoom cam to correspondingly rotate, pass through zoom, compensated curve slot and zoom
Guide pin component, compensation guide pin component drive zoom balladeur train, compensation balladeur train to move in the way of zoom, compensated curve slot, body tube
On two straight troughs play the role of limit zoom guide pin component, compensation guide pin component, and make zoom balladeur train, compensate balladeur train rotation
Transhipment is dynamic to be become moving along a straight line；Strict control zoom guide pin component and the curved groove and primary mirror for compensating guide pin component and zoom cam
The fit clearance between straight-line groove on cylinder guarantees that zoom component and compensation component slide steadily, without cassette tape；It is rotated by motor
Realize that zoom component and compensation component do linear motion back and forth by zoom motion equation requirement, to realize the company of system focal length
Continuous variation function, when the focal length of system changes, zoom gear and zoom cam-engaged are synchronous with zoom potentiometer tooth
Opposite rotation occurs for wheel, so that the resistance value of potentiometer is changed, the change of potentiometer can be found out by sample circuit appropriate
Change value, and it is transmitted to control centre, to realize the display of zoom value；Conversely, respective resistance values order is provided by control centre, it can
Realize the real-time control of focal length；Microswitch plays the limit to system in zooming procedure by zoom banking pin cooperating
And protective effect；Temperature control panel, which is connected through a screw thread, to be fixed on body tube, can monitor temperature change in real time.
7. the high definition continuous magnification lens according to claim 4 with active temperature focusing function, it is characterised in that：Institute
Fixed group E is set in iris diaphgram component and rear fixation kit after stating, iris diaphgram built in the iris diaphgram component, it is described can
Becoming diaphragm component includes Iris motor and the microswitch composition for controlling diaphragm openings of sizes position, and shown microswitch is logical
Diaphragm limiting bracket to be crossed to be placed on diaphragm seat, the diaphragm piece is placed on diaphragm rotating ring and diaphragm seat by rivet interlacement,
The Iris motor is placed on diaphragm seat by Iris motor frame, and Iris motor gear is housed on the Iris motor, is passed through
Diaphragm third wheel drives aperture setting ring rotation after engaging with aperture setting ring gear, the aperture setting ring is by aperture setting ring pressure
Circle is locked on diaphragm seat, and the aperture setting ring dials nail by the diaphragm being placed on diaphragm rotating ring and diaphragm rotating ring is driven to turn
Dynamic, the diaphragm rotating ring is locked in diaphragm seat by diaphragm rotating ring pressing ring, and the diaphragm rotating ring drives the rotation of diaphragm piece to control
The variation of Electronic control aperture size is realized in the variation of f-stop openings of sizes；The Iris motor gear passes through diaphragm third wheel
It is engaged with aperture setting ring, diaphragm potentiometer is fixed on diaphragm seat using diaphragm potentiometer support, and diaphragm potentiometer passes through light
Late potentiometer gear is engaged with aperture setting ring gear, and when Iris motor rotation, Iris motor gear crosses wheel belt by diaphragm
Dynamic light bar adjusts ring generation and correspondingly rotates, synchronous with diaphragm potentiometer gear to realize the display of stop opening size
Opposite rotation occurs, the resistance value of potentiometer is made to change, the variation of potentiometer can be found out by sample circuit appropriate
Value, and it is transmitted to control centre, to realize the display to aperture openings size；Conversely, providing respective resistance values by control centre
Order the real-time control, it can be achieved that focal length；Auxiliary support plate, which is connected through a screw thread, to be fixed in seal assembly.
8. the high definition continuous magnification lens according to claim 4 with active temperature focusing function, it is characterised in that：Institute
It states sealing structure to be made of mirror cover, preceding screening glass, front shroud cylinder, middle cover cylinder, ring flange, back cover cylinder, preceding screening glass passes through preceding protection
Piece pressing ring is fixed in front shroud cylinder, and front shroud cylinder is locked on middle cover cylinder by hexagon socket cap head screw, and ring flange is justified by interior hexagonal
Chapiter screw is locked on middle cover cylinder, and back cover cylinder is locked on ring flange by hexagon socket cap head screw.
9. a kind of focus adjustment method of the high definition continuous magnification lens with active temperature focusing function, which is characterized in that using such as
Any high definition continuous magnification lens with active temperature focusing function described in claim 1-8, and according to the following steps into
Row：Camera lens uses first fixed group（﹢）, zoom group（﹣）, compensation group（﹢）, afterwards fix group（﹢）The structure of four constituent elements, before zoom group
After when moving, compensation group is mobile to guarantee that image planes are constant simultaneously, this process realizes the variation of lens focus；By rationally dividing
Focal power with four constituent elements makes camera lens have longer focal length under lesser length dimension.
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