CN106199934A - The high definition continuous vari-focus pick-up lens that under low temperature environment, visual field is switched fast - Google Patents
The high definition continuous vari-focus pick-up lens that under low temperature environment, visual field is switched fast Download PDFInfo
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- CN106199934A CN106199934A CN201610732873.0A CN201610732873A CN106199934A CN 106199934 A CN106199934 A CN 106199934A CN 201610732873 A CN201610732873 A CN 201610732873A CN 106199934 A CN106199934 A CN 106199934A
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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 +-+
-
- 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
Abstract
The present invention relates to the high definition continuous vari-focus pick-up lens that under a kind of low temperature environment, visual field is switched fast, be provided with along light direction focal power be positive front fixed lens group, focal power be offset lens group, iris and the focal power that negative Zoom lens group, focal power are positive be negative rear fixed lens group；Front fixed lens group is provided with biconvex lens, positive crescent moon lens and the first glued group touched by the positive crescent moon lens of negative crescent moon lens and second；Zoom lens group is provided with the second glued group, the biconcave lens touched by the second negative crescent moon lens and the second biconvex lens；Offset lens group is provided with the 3rd biconvex lens, the 3rd glued group, the 3rd positive crescent moon lens touched by the 3rd negative crescent moon lens and the 4th biconvex lens；Rear fixed lens group is provided with the second biconcave lens, the 4th positive crescent moon lens, planoconvex lens, the 4th glued group touched by the 3rd biconcave lens and the 5th biconvex mirror group.Solve the problem cannot quickly cut under low temperature environment.
Description
Technical field
The present invention relates to the high definition continuous vari-focus pick-up lens that under a kind of low temperature environment, visual field is switched fast, belong to photoelectricity skill
Art field.
Background technology
Optical design, structure when requiring pick-up lens can be switched fast visual field, rapid lock onto target, to camera system
Design, processing technique propose the highest requirement, particularly when low temperature state, owing to the expansion rate between different materials exists
Diversity, the fit clearance between different parts will become the least and even be fastened directly to together, rubbing between moving component
Wiping power is substantially increased, and movement load is substantially increased.The most mobile difficulty of moving component is greatly increased, and conventional design cannot meet
This application demand.In general, designer can wish to reduce motion helical pitch as far as possible, reduce cam path pressure angle, uses and expands
The material that rate is close, to reduce the rising of movement load.But these boundary conditions will limit the increase of system zoom ratio, hinders system
System densification, lightweight, systemic resolution is difficult to improve.
Along with the pixel dimension of imageing sensor constantly reduces, its characteristic frequency increases sharply, it is desirable to photo electric video frequency monitoring
Target " can be identified and cognitive "；At special occasions, do not require nothing more than high definition imaging, also requirement and can be switched fast visual field, make motion mesh
Mark will not be lost and energy lock onto target rapidly during switching visual field, especially under extreme temperature environment, it is desirable to system is also
Can reliably working；And at present machine system develops towards compact, lightweight direction, also an urgent demand designer follows this and becomes
Gesture, improves product competitiveness.To this end, solve the research purpose that the problems referred to above are the present invention.
Summary of the invention
It is an object of the invention to provide the high definition continuous vari-focus pick-up lens that under a kind of low temperature environment, visual field is switched fast,
It is not only simple in structure, and solves that high definition varifocal lens cannot be switched fast at low ambient temperatures, picture quality is low, zoom
Than the problem such as low, volume weight is big.
Technical program of the present invention lies in: the high definition continuous vari-focus camera lens that under a kind of low temperature environment, visual field is switched fast
Head, camera lens include the focal power laid successively along light direction be positive front fixed lens group, focal power be negative zoom
Offset lens group, iris and the focal power that battery of lens, focal power are positive is negative rear fixed lens group；Fix before described
Battery of lens be disposed with biconvex lens, positive crescent moon lens and by negative crescent moon lens and second positive crescent moon lens contiguity
First glued group；Described Zoom lens group is provided with the second glue touched by the second negative crescent moon lens and the second biconvex lens
Charge-coupled, biconcave lens；Described offset lens group is disposed with the 3rd biconvex lens, by the 3rd negative crescent moon lens and the 4th biconvex
3rd glued group, the 3rd positive crescent moon lens of lens contiguity；It is saturating that described rear fixed lens group is disposed with the second concave-concave
Mirror, the 4th positive crescent moon lens, planoconvex lens, the 4th glued group touched by the 3rd biconcave lens and the 5th biconvex mirror group.
Further, along light direction, the airspace between described front fixed lens group and Zoom lens group is
18.1～47.2mm, the airspace between Zoom lens group B and offset lens group C is 2.9～48mm, offset lens group C with
Airspace between rear fixed lens group E is 2.4～18.4mm.
Further, in described front fixed lens group A, the airspace between biconvex lens A1 and positive crescent moon lens A2 is
Airspace between 0.5mm, positive crescent moon lens A2 and the first glued group is 3.5mm；In described Zoom lens group B, the second glue
Airspace between charge-coupled and biconcave lens B3 is 5.5mm；In described offset lens group C, biconvex lens C1 and the 3rd is glued
Airspace between group is 0.25mm, and the airspace between the 3rd glued group and the 3rd positive crescent moon lens C4 is 0.25mm；
In described rear fixed lens group E, the airspace between the second biconcave lens E1 and the 4th positive crescent moon lens E2 is 1mm, the 4th
Airspace between positive crescent moon lens E2 and planoconvex lens E3 is 16mm, the air between the glued group of planoconvex lens E3 and the 4th
It is spaced apart 1.2mm.
Further, the described second positive crescent moon lens are made up of ED material H-FK61.
Further, the front and back ends being positioned at camera lens is respectively arranged with rectangle flange, and the bottom of described rectangle flange is equal
It is fixedly connected into bridge architecture with the base plate being positioned at bottom camera lens.
Further, being provided with focus adjusting mechanism in camera lens, described focus adjusting mechanism includes the focusing electricity being installed on outside body tube
Thermomechanical components and the front group of microscope base being internally provided with front fixed lens group, described front group microscope base seat is installed in body tube；Described tune
The motor output end of burnt electric machine assembly is provided with gear, and the external toothing of described gear and the focusing ring being placed on body tube is nibbled mutually
Closing, on described front group microscope base, interval is laid with some focusing guide pins, the translot that described focusing guide pin is disposed through on body tube
Being connected with the cam path being opened on focusing ring guides front group of microscope base to make rotational motion to linear motion relative to body tube for realizing.
Further, before and after described focusing ring, end is respectively arranged with accurate steel balls, and through being bolted in body tube front end
Focusing ring clamp ring is pressed on body tube.
Further, being additionally provided with zoom mechanism in camera lens, described zoom mechanism includes being installed on body tube rear outside
Zoom electric machine assembly and be arranged at body tube posterior medial zoom microscope base and compensate microscope base, be provided with in described zoom microscope base
Zoom lens group, is provided with offset lens group in described compensation microscope base, compensate be placed on corresponding with zoom microscope base of microscope base and be arranged on
Before and after two parallel guide rods in body tube hold, the gear on described zoom electric machine assembly outfan through third wheel with respectively with precision
The gear of potentiometer is meshed with the gear of the cam being placed on body tube, and described cam offers zoom curved groove and benefit
Repay curved groove, described zoom microscope base is provided with the zoom guide pin matched with zoom curved groove, described compensation microscope base is arranged
There is the compensation guide pin matched with compensating curve groove.
Further, before and after described cam, end is correspondingly arranged on the front accurate steel balls and rear precision matched in body tube
Steel ball, and be pressed on body tube through being bolted in the cam lock collar of body tube rear end, described zoom microscope base is provided with zoom
Guide pin bushing, the front end of described guide rod is connected with body tube through zoom guide pin bushing, described compensation microscope base is provided with compensation guide pin bushing, institute
The rear end stating guide rod is connected through compensating guide pin bushing with body tube.
Further, described zoom guide pin is equipped with the zoom roller matched with zoom curved groove, and levels with a roller through zoom
Sub-clamp ring lock onto on zoom guide pin；The compensation roller matched with compensating curve groove it is equipped with on described compensation guide pin, and
Compensated roller clamp ring lock onto on compensation guide pin.
Compared with prior art, the invention have the advantages that the present invention just to utilize and organize collocation structure, be conducive to improving
The feature of focal length resolution, improves the focal power ability to take the burden of the highest front fixed lens group of axle glazed thread height, and uses
A piece of ED(ED) material, significantly reduce the aberrations such as optical lens second order spectrum, make the resolution of camera lens significantly carry
Height, can be adaptive with the video camera of fine definition；Reasonably combined material, makes system have stronger temperature adaptation ability, as far as possible
Reduce temperature focussing frequency, improve system reliability；Utilize and just organizing the advantage that in collocation structure, moving parts helical pitch is relatively uniform,
Retrain further, reduce motion helical pitch and make zoom, compensate moving parts helical pitch the most uniformly to reduce movement load.Profit
With the macro language programs write, cam curve is optimized repeatedly, cam angle further homogenization when making adjacent fields of view switch；Pin
Align the shortcoming that group collocation structure optics overall length is longer, introduce in rear fixed lens group and take the photograph remote structure so that system has compact
Change, light-weighted feature.
Accompanying drawing explanation
Fig. 1 is the light channel structure schematic diagram of the present invention；
Fig. 2 is the MTF figure during focal length of the present invention；
Fig. 3 is MTF figure during short Jiao of the present invention；
Fig. 4 is the lens construction schematic diagram of the present invention；
Fig. 5 is the top view of Fig. 4 of the present invention；
Fig. 6 is the right view of Fig. 4 of the present invention；
Fig. 7 is the structural representation of the focus adjusting mechanism of the present invention；
Fig. 8 is the structural representation of the zoom mechanism of the present invention；
Fig. 9 is the present invention with 8 A district enlarged drawings；
In figure: accurate before 1-cam cover 2-screw 3-zoom microscope base 4-guide rod 5-body tube 51-translot 6-
Steel ball 7-third wheel 8-zoom guide pin 9-zoom roller clamp ring 10-zoom roller 11-precision potentiator 12-becomes
Times guide pin bushing 13-zoom motor assembly 14-cam 15-compensates guide pin bushing 16-and compensates roller clamp ring 17-and compensate guide pin
After 18-compensates roller 19-, accurate steel balls 20-cam lock collar 21-compensates microscope base 22-optical axis 23-focusing ring lock
Microscope base 28-focusing guide pin 30-focusing electricity is organized before collar 24-accurate steel balls 26-focusing ring 26a-cam path 27-
Thermomechanical components 30a-gear 31-optical axis 32-CCD camera assembly 33-control module assembly 34-base plate 35-becomes
Fixed lens group A1-biconvex lens A2-positive crescent moon lens before burnt microswitch component 36-Iris motor assembly A-
A3-bears crescent moon lens A4-second positive crescent moon lens B-Zoom lens group B1-the second negative crescent moon lens B2-second couple
The convex lens B3-negative crescent moon lens C3-of biconcave lens C-offset lens group C1-the 3rd biconvex lens C2-the 3rd
Fixed lens group E1-the second biconcave lens after four biconvex lens C4-the 3rd positive crescent moon lens D-iris E-
E2-the 4th positive crescent moon lens E3-planoconvex lens E4-the 3rd biconcave lens E5-the 5th biconvex mirror group.
Detailed description of the invention
For the features described above of the present invention and advantage can be become apparent, special embodiment below, and coordinate accompanying drawing, make in detail
Carefully it is described as follows, but the present invention is not limited to this.
With reference to Fig. 1
The high definition continuous vari-focus pick-up lens that under a kind of low temperature environment, visual field is switched fast, including along light direction successively cloth
If be laid in camera lens and focal power be positive front fixed lens group A, focal power be that negative Zoom lens group B, focal power are for just
Offset lens group C, iris D and focal power be negative rear fixed lens group E；Described front fixed lens group sets gradually
There are biconvex lens A1, positive crescent moon lens A2 and the first glue by negative crescent moon lens A3 and second positive crescent moon lens A4 contiguity
Charge-coupled；Described Zoom lens group is provided with the second gluing touched by the second negative crescent moon lens B1 and the second biconvex lens B2
Group, biconcave lens B3；Described offset lens group is disposed with the 3rd biconvex lens C1, by the 3rd negative crescent moon lens C2 and the 4th
3rd glued group, the 3rd positive crescent moon lens C4 of biconvex lens C3 contiguity；Described rear fixed lens group is disposed with
Two biconcave lens E1, the 4th positive crescent moon lens E2, planoconvex lens E3, touched by the 3rd biconcave lens E4 and the 5th biconvex mirror group E5
The 4th glued group.
Airspace in the present embodiment, along light direction, between described front fixed lens group and Zoom lens group
Being 18.1～47.2mm, the airspace between Zoom lens group B and offset lens group C is 2.9～48mm, offset lens group C
And the airspace between rear fixed lens group E is 2.4～18.4mm.
Airspace in the present embodiment, in described front fixed lens group A, between biconvex lens A1 and positive crescent moon lens A2
Being 0.5mm, the airspace between the glued group of positive crescent moon lens A2 and first is 3.5mm；In described Zoom lens group B, second
Airspace between glued group and biconcave lens B3 is 5.5mm；In described offset lens group C, biconvex lens C1 and the 3rd glue
Airspace between charge-coupled is 0.25mm, and the airspace between the 3rd glued group and the 3rd positive crescent moon lens C4 is
0.25mm；In described rear fixed lens group E, the airspace between the second biconcave lens E1 and the 4th positive crescent moon lens E2 is
1mm, the airspace between the 4th positive crescent moon lens E2 and planoconvex lens E3 is 16mm, the glued group of planoconvex lens E3 and the 4th
Between airspace be 1.2mm.
In the present embodiment, the described second positive crescent moon lens are made up of ED material H-FK61.
Zoom multiple of the present invention is relatively big, but system overall length is shorter, in theory from the point of view of select the initiating structure ratio of compensation for negative group
Advantageous in improving image quality, reduce design difficulty, minimizing number of lenses.But in compensation for negative group structure, the motion of zoom group is led
Journey is long, and compensation group stroke is shorter, and the angular displacement of the cam of adjacent fields of view is the most uneven, it is difficult to realizes visual field and is switched fast,
Therefore select the initiating structure just organizing compensation as starting point.This structure zoom group is more equal with compensation group motion helical pitch distribution ratio
Even, beneficially visual field is switched fast；Glass material to choose aspect degree of freedom relatively big, the temperature advantageously reducing system is sensitive
Property, reduce temperature focussing frequency, improve reliability, but optimizing system imaging quality, reducing system overall length, raising transmitance side
Face difficulty is bigger.
When optical design, front fixed lens group is complicated, increase a plus lens, and select the ultralow color of ED(
Dissipate) optical material, which enhance the focal power ability to take the burden of axle glazed thread height the highest front fixing group, significantly reduce
The aberrations such as optical lens second order spectrum, resolution is significantly improved, and reaches super mega pixel level, can be with the taking the photograph of fine definition
Camera is adaptive.The motion helical pitch of constrained motion assembly, constrained motion assembly gross weight further, and make zoom, compensate exercise group
Part helical pitch is the most uniformly to reduce movement load.Improve fast switching capability；And by the macro language programs optimization campaign write
Curve, allows the cam of adjacent fields of view switch corner more homogenization；The shortcoming longer for just organizing collocation structure optics overall length,
Remote structure is taken the photograph in the introducing of rear fixing group so that system has densification, light-weighted feature.
The pick-up lens being made up of above-mentioned lens set can reach following technical specification:
1, focal length: f '=34mm～300mm ± 1.5%；
2, relative aperture: '=1/5.2；
3, resolution of lens: " ccd video camera video camera (resolution 1024*768, pixel dimension with mega pixel 1/3
4.65umX4.65um) adaptive；
5, fine setting is focused on；Camera lens has focusing fine setting fine adjustment function.
6, focus on omnidistance zooming time and be not more than 4 sec；
7, zoom whole process zooming time is not more than 7 sec；
8, operating temperature :-40 DEG C～60 DEG C；
9, vibration: amplitude 0.01g2/ Hg, frequency 5～500 H exist；
10, camera lens overall dimensions: 85*85*195；
11, weight: light-weight design, no more than 1.95kg；
12, fixing visual field switching: big visual field L:8 (H) * 6 (V): middle visual field M:2 (H) * 1.5 (V): small field of view S:0.91 (H) *
0.68 (V) switching time: adjacent fields of view Tc switching time≤1.5sec；
13, the multiple precision of optical axis: big visual field L:0.05 mil: middle visual field M:0.1 mil: small field of view S:0.15 mil.
In the present embodiment, the rear end of described body tube connects has ccd video camera assembly 32, on described ccd video camera assembly
It is provided with control module assembly 33.Body tube bottom is provided with base plate 34, is positioned on the downside of the middle part of body tube that to be provided with zoom micro-
Dynamic switch module 35, it is that 195mm (takes the photograph containing CCD that the rear side end bottom of body tube is additionally provided with Iris motor assembly 36. camera lens overall length
Camera), a width of 85mm, high 85mm.In order to bear amplitude 0.01g2/ Hg, frequency is vibration and the small form factor requirements of 5～500Hg,
We use bridge linkage structure as shown in Figures 4 to 6, and the front and back ends being positioned at camera lens is respectively arranged with rectangle flange, institute
The bottom stating rectangle flange is all fixedly connected into bridge architecture with the base plate being positioned at bottom camera lens.Select suitable base plate thick
Degree, reduces the center of gravity of system, as far as possible to increase the resonant frequency of camera lens, it is to avoid produces resonance at low frequency, thus improves mirror
The resistance to shock of head.Described baseboard material is: LY12-cz duralumin, and thickness is 10.5mm, a height of 42.5mm in center of system.This
After model machine is debug, carry out vibrating, impact experiment.Experimental result does not produce covibration in frequency of vibration section.The multiple precision of optical axis:
Big visual field L: less than 0.03 mil: middle visual field M: less than 0.7 mil: small field of view S: less than 0.12 mil: meet technical conditions and want
Ask.
In the present embodiment, in order to meet the requirement of operating temperature, (i.e. high temperature 60 DEG C, during low temperature-40 DEG C, system will not be subject to
The impact of thermal stress, and make eyeglass produce flexural deformation, thus affect the image quality of product), it is desirable to front group of lens barrel of selection
The material coefficient of expansion less, and and the expansion coefficient similar of glass.By distribution type, select and glass material coefficient of expansion phase
Near low-alloy steel 16Mn is as the material of front group of lens barrel, and its coefficient of expansion is 8.31 × 10-6Mm/ DEG C and glass material 8 × 10-6Mm/ DEG C closely.So can ensure that, in temperature experiment (in the case of variations in temperature 100 DEG C), picture frame is swollen with glass
Swollen (contraction) difference is much smaller than picture frame and glass.
In the present embodiment, as it is shown in fig. 7, be provided with focus adjusting mechanism in camera lens, described focus adjusting mechanism includes being installed on primary mirror
Focusing electric machine assembly 30 outside Tong and the front group of microscope base 27 being internally provided with front fixed lens group A, described front group microscope base seat is installed
In body tube 5；The motor output end of described focusing electric machine assembly is provided with gear 30a, described gear be placed on body tube
On the external toothing of focusing ring 26 be meshed, described before circumferentially spaced on group microscope base be laid with 3 focusing guide pins, described focusing
The translot 51 that guide pin is disposed through on body tube is connected with the cam path 26a being opened on focusing ring before realizing guiding
Group microscope base makees rotational motion to linear motion relative to body tube.Before and after described focusing ring, end is respectively arranged with accurate steel balls 24, and through spiral shell
The focusing ring clamp ring 23 being connected to body tube front end is pressed on body tube, so that sliding friction when focusing ring rotates changes
For rolling friction, to reduce frictional force during cam motion.When the electrical power of electric machine assembly of focusing, rotor does forward and reverse fortune
Dynamic, the gear on focusing electric machine assembly drives focusing ring to make forward and reverse motion by engagement, focusing ring pass through three uniform convex
Race drives three uniform focusing guide pins to make forward and reverse motion, and three uniform focusing guide pins are straight at three uniform body tubes
Under the position-limiting action of groove, group lens barrel before driving, make forward and reverse linear motion, thus drive the front fixed lens group of camera lens just making
Reverse linear motion, it is achieved the purpose of system focusing.
This example uses: focusing electric machine assembly gear engagement circle is the gear of Φ 12.The decelerating through motor of focusing electric machine assembly
Case speed reducing ratio 256:1, focusing Rated motor rotating speed is 6510 revs/min, and the engagement circle of focusing ring is Φ 76mm.On focusing ring three
The focusing helical pitch of uniform cam path is 0.7mm, and the anglec of rotation is 71.50.Therefore the focusing component whole process focusing time t of this example
For: t=(1/ motor speed) × (speed reducing ratio of reduction box) × (focusing ring engagement circular diameter/motor gear diameter) × (focusing ring
The anglec of rotation/360 °)=2.97 seconds.Meet and focus on the requirement that omnidistance zooming time is not more than 4sec.
In the present embodiment, as shown in Figure 8 and Figure 9, being additionally provided with zoom mechanism in camera lens, described zoom mechanism includes installing
Zoom electric machine assembly 13 and zoom microscope base 3 and the compensation microscope base being arranged at body tube posterior medial in body tube rear outside
21, be provided with Zoom lens group B in described zoom microscope base, in described compensation microscope base, be provided with offset lens group C, compensate microscope base and
Zoom microscope base correspondence is held before and after being placed on two parallel guide rods 4 being arranged in body tube, and the front end of described guide rod is through camb cap
Plate 1 is fixed on body tube 5, and described cam cover is provided with the screw 2 being connected with body tube.Described zoom electric machine assembly is defeated
Go out gear on end through third wheel 7 with respectively with the gear of precision potentiator 11 and the gear phase of cam 14 that is placed on body tube
Engagement, by zoom curved groove in the requirement milling of the optical zoom equation of motion and compensating curve groove on described cam, described zoom mirror
It is provided with the zoom guide pin 8 matched with zoom curved groove on seat, described compensation microscope base is provided with and matches with compensating curve groove
The compensation guide pin 17 closed.
In the present embodiment, before and after described cam 14, end is correspondingly arranged on front accurate steel balls 6 He matched in body tube
Rear accurate steel balls 19, and be pressed on body tube through being bolted in the cam lock collar 20 of body tube rear end, when cam is rotated
Sliding friction is changed into rolling friction, to reduce frictional force during cam motion.Described zoom microscope base tightens is furnished with zoom guide pin bushing
12, the front end of described guide rod 4 is connected through zoom guide pin bushing with body tube, and described compensation microscope base tightens is furnished with compensation guide pin bushing 15,
The rear end of described guide rod through compensate guide pin bushing be connected with body tube, thus realize compensation microscope base and zoom microscope base be nested with at guide rod
On.
In the present embodiment, described zoom guide pin 8 is equipped with the zoom roller 10 matched with zoom curved groove, and through becoming
Times roller clamp ring 9 lock onto on zoom guide pin；The compensation roller matched with compensating curve groove it is equipped with on described compensation guide pin
Son 18, and compensated roller clamp ring 16 lock onto compensation guide pin on.
When positive and negative rotary motion made by the motor of zoom motor assembly, (motor gear is by third wheel and precision potentiator tooth
Wheel, cam wheel engagement rotation) make precision potentiator and cam synchronous rotary.By zoom, compensating curve groove and zoom guide pin
Assembly, compensation guide pin assembly drive zoom microscope base, compensation microscope base to move by the mode of zoom, compensating curve groove.Article two, guide rod rises
To support, and change zoom microscope base, compensate microscope base become linear motion from rotary motion.Zoom guide pin bushing, compensate guide pin bushing be for
Increase the length that is slidably matched, increase zoom microscope base, stationarity when compensating microscope base motion.So rotated by motor and realize becoming
Times microscope base, compensate microscope base and make tandem motion by the zoom equation of motion requirements, change so that the focal length of system produces.When being
When the focal length of system changes, the gear of precision potentiator is engaged by third wheel, makes precision potentiator rotate, then precision potentiator
Resistance change, the changing value of precision potentiator can be taken out by suitable sample circuit, and pass to control centre, from
And realize the display of zoom level.
In order to realize the use requirement that visual field under low temperature environment is switched fast, zoom guide pin bushing, compensation guide pin bushing are identical with guide rod
Material.Owing to warm swollen coefficient is identical, when low temperature, zoom guide pin bushing, the gap that compensates between guide pin bushing and guide rod are identical with during room temperature.
Avoiding when low temperature zoom guide pin bushing, compensate gap between guide pin bushing and guide rod and diminish, frictional force rises rapidly, and load increases rapidly
Greatly, adjacent fields of view is slack-off for switching time, so that stuck existing picture.
It is switched fast speed to improve visual field under low temperature environment further, as shown in Figure 8, adopts band molybdenum bisuphide roller
Zoom guide pin assembly substitutes.I.e. zoom roller 10 is arranged on zoom guide pin 8, and makes zoom with zoom roller clamp ring 9 locking
Roller can roll in cam zoom curved groove, and the sliding friction that zoom guide pin is moved in curved groove is changed into rolling and rubs
Wipe, to reduce frictional force when cam moves with zoom guide pin.The compensation guide pin assembly of band molybdenum bisuphide roller is in like manner used to replace
In generation, reduce cam and frictional force when compensating guide pin motion, thus the load under reducing low temperature environment, improve and regard under low temperature environment
Field is switched fast speed.
The engagement circle of the zoom cam of this example is Φ 62mm, and the engagement circular diameter of zoom motor assembly is Φ 17mm, electricity
The speed reducing ratio of machine reduction box uses 76:1, and Rated motor speed is 5460 revs/min, and the maximum helical pitch of zoom cam visual field switching is
77.66 °, therefore maximum duration t of variable focus package visual field switching is: t=(1/ motor speed) × (speed reducing ratio of reduction box) ×
(zoom cam-engaged circular diameter/zoom motor gear diameter) × (cam helical pitch/360 °)=(60/5460) × (76) × (62/
17) × (77.66/360)=0.66 second.Meet switching time: the requirement of adjacent fields of view Tc switching time≤1.5sec.
The foregoing is only presently preferred embodiments of the present invention, for the ordinary skill in the art, according to this
Bright teaching, designs the high definition continuous vari-focus pick-up lens that under the low temperature environment of multi-form, visual field is switched fast and is not required to
Performing creative labour, the most all according to scope of the present invention patent done equal
Deng changing, revise, replace and modification, the covering scope of the present invention all should be belonged to.
Claims (10)
1. the high definition continuous vari-focus pick-up lens that under a low temperature environment, visual field is switched fast, it is characterised in that camera lens includes edge
The focal power that light direction is laid successively be positive front fixed lens group, focal power be negative Zoom lens group, focal power
It is negative rear fixed lens group for positive offset lens group, iris and focal power；Described front fixed lens group sets successively
It is equipped with biconvex lens, positive crescent moon lens and the first glued group touched by the positive crescent moon lens of negative crescent moon lens and second；
It is saturating that described Zoom lens group is provided with the second glued group of being touched by the second negative crescent moon lens and the second biconvex lens, concave-concave
Mirror；Described offset lens group is disposed with the 3rd biconvex lens, by the 3rd negative crescent moon lens and the 4th biconvex lens contiguity
The 3rd become glued group, the 3rd positive crescent moon lens；Described rear fixed lens group is disposed with the second biconcave lens, the 4th first month of the lunar year
Tooth lens, planoconvex lens, the 4th glued group touched by the 3rd biconcave lens and the 5th biconvex mirror group.
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 1, visual field is switched fast, its feature
Being, along light direction, the airspace between described front fixed lens group and Zoom lens group is 18.1～47.2mm,
Airspace between Zoom lens group B and offset lens group C is 2.9～48mm, offset lens group C and rear fixed lens group E
Between airspace be 2.4～18.4mm.
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 1 and 2, visual field is switched fast, it is special
Levying and be, in described front fixed lens group A, the airspace between biconvex lens A1 and positive crescent moon lens A2 is 0.5mm, the first month of the lunar year
Airspace between the glued group of tooth lens A2 and first is 3.5mm；In described Zoom lens group B, the second glued group and concave-concave
Airspace between lens B3 is 5.5mm；Sky in described offset lens group C, between the glued group of biconvex lens C1 and the 3rd
Gas is spaced apart 0.25mm, and the airspace between the 3rd glued group and the 3rd positive crescent moon lens C4 is 0.25mm；Fix after described
In battery of lens E, the airspace between the second biconcave lens E1 and the 4th positive crescent moon lens E2 is 1mm, the 4th positive crescent moon lens
Airspace between E2 and planoconvex lens E3 is 16mm, and the airspace between the glued group of planoconvex lens E3 and the 4th is
1.2mm。
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 1, visual field is switched fast, its feature
Being, the described second positive crescent moon lens are made up of ED material H-FK61.
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 1, visual field is switched fast, its feature
Being, the front and back ends being positioned at camera lens is respectively arranged with rectangle flange, the bottom of described rectangle flange all be positioned at the bottom of camera lens
The base plate in portion is fixedly connected into bridge architecture.
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 1, visual field is switched fast, its feature
Being, be provided with focus adjusting mechanism in camera lens, described focus adjusting mechanism includes focusing electric machine assembly and the inside being installed on outside body tube
Being provided with front group of microscope base of front fixed lens group, described front group microscope base seat is installed in body tube；Described focusing electric machine assembly
Motor output end is provided with gear, and described gear is meshed with the external toothing of the focusing ring being placed on body tube, described front group
On microscope base, interval is laid with some focusing guide pins, the translot that described focusing guide pin is disposed through on body tube be opened in focusing
Cam path on ring is connected and guides front group of microscope base to make rotational motion to linear motion relative to body tube for realizing.
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 6, visual field is switched fast, its feature
Being, before and after described focusing ring, end is respectively arranged with accurate steel balls, and through being bolted in the focusing ring clamp ring of body tube front end
It is pressed on body tube.
8. the high definition continuous vari-focus pick-up lens being switched fast according to visual field under the low temperature environment described in claim 1 or 6, it is special
Levying and be, be additionally provided with zoom mechanism in camera lens, described zoom mechanism includes the zoom motor being installed on body tube rear outside
Assembly and the zoom microscope base and the compensation microscope base that are arranged at body tube posterior medial, be provided with Zoom lens in described zoom microscope base
Group, is provided with offset lens group in described compensation microscope base, compensate be placed on corresponding with zoom microscope base of microscope base and be arranged in body tube
Two parallel guide rods before and after hold, the gear on described zoom electric machine assembly outfan through third wheel with respectively with precision potentiator
Gear is meshed with the gear of the cam being placed on body tube, and described cam offers zoom curved groove and compensating curve
Groove, described zoom microscope base is provided with the zoom guide pin matched with zoom curved groove, described compensation microscope base is provided with and mends
Repay the compensation guide pin that curved groove matches.
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 8, visual field is switched fast, its feature
Being, before and after described cam, end is correspondingly arranged on the front accurate steel balls and rear accurate steel balls matched in body tube, and through spiral shell
The cam lock collar being connected to body tube rear end is pressed on body tube, and described zoom microscope base is provided with zoom guide pin bushing, described in lead
The front end of bar is connected through zoom guide pin bushing with body tube, described compensation microscope base is provided with compensation guide pin bushing, after described guide rod
Hold and be connected with body tube through compensation guide pin bushing.
The high definition continuous vari-focus pick-up lens that under low temperature environment the most according to claim 8, visual field is switched fast, its feature
It is, described zoom guide pin is equipped with the zoom roller matched with zoom curved groove, and locks through zoom roller clamp ring
On zoom guide pin；The compensation roller matched with compensating curve groove, and compensated roller lock it is equipped with on described compensation guide pin
Collar lock onto on compensation guide pin.
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| CN201610732873.0A CN106199934B (en) | 2016-08-27 | 2016-08-27 | The high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment |
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| CN201610732873.0A CN106199934B (en) | 2016-08-27 | 2016-08-27 | The high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment |
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| CN106199934B CN106199934B (en) | 2018-07-27 |
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| CN107492136A (en) * | 2017-09-06 | 2017-12-19 | 叶进蓉 | A kind of animation producing method and device |
| CN110879448A (en) * | 2019-11-04 | 2020-03-13 | 中国科学院西安光学精密机械研究所 | Continuous zooming device and assembling method thereof |
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|---|---|
| CN106199934B (en) | 2018-07-27 |
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