CN106199934B - The high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment - Google Patents
The high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment Download PDFInfo
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- CN106199934B CN106199934B CN201610732873.0A CN201610732873A CN106199934B CN 106199934 B CN106199934 B CN 106199934B CN 201610732873 A CN201610732873 A CN 201610732873A CN 106199934 B CN106199934 B CN 106199934B
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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
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- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Microscoopes, Condenser (AREA)
- Lens Barrels (AREA)
Abstract
The present invention relates to the high definition continuous vari-focus pick-up lens that visual field under a kind of low temperature environment is switched fast, it is negative rear fixed lens group that along light incident direction, to be equipped with the Zoom lens group, focal power that the preceding fixed lens group, focal power that focal power is positive are negative, which be positive offset lens group, iris diaphgram and focal power,；Preceding fixed lens group is provided with biconvex lens, positive crescent moon lens and the first gluing unit made of negative crescent moon lens and the second positive crescent moon lens contiguity；Zoom lens group is provided with the second gluing unit, biconcave lens made of the second negative crescent moon lens and the second biconvex lens contiguity；Offset lens group is provided with third biconvex lens, crescent moon lens are born by third and the 4th biconvex lens contiguity made of third gluing unit, the positive crescent moon lens of third；Fixed lens group is provided with the second biconcave lens, the 4th positive crescent moon lens, planoconvex spotlight, the 4th gluing unit made of third biconcave lens and the 5th biconvex microscope group contiguity afterwards.It solves the problems, such as quickly cut under low temperature environment.
Description
Technical field
The present invention relates to the high definition continuous vari-focus pick-up lens that visual field under a kind of low temperature environment is switched fast, and belong to photoelectricity skill
Art field.
Background technology
When requiring pick-up lens that can be switched fast visual field, rapid lock onto target, optical design, structure to camera system
Design, processing technology propose very high requirement, especially in low-temperature condition, since the expansion rate between different materials exists
Otherness, the fit clearance between different components will become very small or even be fastened directly to together, rubbing between moving component
It wipes power to be substantially increased, movement load is substantially increased.The difficulty that fast moves of moving component greatly increases, and conventional design cannot be satisfied
This application demand.In general, designer can wish to reduce movement helical pitch as possible, reduce cam path pressure angle, use expansion
The close material of rate, to reduce the rising of movement load.But these boundary conditions will limit the increase of system zoom ratio, hinder system
System densification, lightweight, systemic resolution are difficult to improve.
Constantly reduce with the pixel dimension of imaging sensor, characteristic frequency increases sharply, it is desirable that photo electric video frequency monitoring
It can " identification and cognition " target；In special occasions, high definition imaging is not required nothing more than, and also requirement can be switched fast visual field, make movement mesh
Mark will not be lost during switching visual field and the rapid lock onto target of energy, especially under extreme temperature environment, it is desirable that system
It can reliably working；And machine system develops towards compact, lightweight direction at present, also an urgent demand designer follows this and becomes
Gesture improves product competitiveness.For this purpose, it is the research purpose of the present invention to solve the above problems.
Invention content
The purpose of the present invention is to provide the high definition continuous vari-focus pick-up lens that visual field under a kind of low temperature environment is switched fast,
Be not only simple in structure, and solve high definition zoom lens at low ambient temperatures and can not be switched fast, picture quality is low, zoom
Than the problems such as low, volume weight is big.
Technical program of the present invention lies in：The high definition continuous vari-focus camera lens that visual field is switched fast under a kind of low temperature environment
Head, camera lens include along the focal power that light incident direction is laid successively be positive preceding fixed lens group A, focal power is negative zoom
Lens group B, focal power are that positive offset lens group C, iris diaphgram D and focal power are negative rear fixed lens group E；Before described
Fixed lens group is disposed with biconvex lens A1, positive crescent moon lens A2 and by bearing the positive crescent moon lens of crescent moon lens A3 and second
First gluing unit made of A4 contiguity；The Zoom lens group is provided with by the second negative crescent moon lens B1 and the second biconvex lens B2
Second gluing unit, biconcave lens B3 made of contiguity；The offset lens group is disposed with third biconvex lens C1, by third
Third gluing unit, the positive crescent moon lens C4 of third made of negative crescent moon lens C2 and the 4th biconvex lens C3 touches；It is fixed after described
Lens group be disposed with the second biconcave lens E1, the 4th positive crescent moon lens E2, planoconvex spotlight E3, by third biconcave lens E4 and
4th gluing unit made of 5th biconvex microscope group E5 contiguity.
Further, the airspace between light incident direction, the preceding fixed lens group and Zoom lens group is
Airspace between 18.1~47.2mm, Zoom lens group B and offset lens group C is 2.9~48mm, offset lens group C with
The airspace between fixed lens group E is 2.4~18.4mm afterwards.
Further, in the preceding fixed lens group A, the airspace between biconvex lens A1 and positive crescent moon lens A2 is
0.5mm, the airspace between positive crescent moon lens A2 and the first gluing unit is 3.5mm；In the Zoom lens group B, the second glue
It is 5.5mm to be combined the airspace between biconcave lens B3；In the offset lens group C, biconvex lens C1 is glued with third
Airspace between group is 0.25mm, and the airspace between third gluing unit and the positive crescent moon lens C4 of third is 0.25mm；
After described in fixed lens group E, the airspace between the positive crescent moon lens E2 of the second biconcave lens E1 and the 4th is 1mm, the 4th
Airspace just between crescent moon lens E2 and planoconvex spotlight E3 is 16mm, the air between planoconvex spotlight E3 and the 4th gluing unit
Between be divided into 1.2mm.
Further, the described second positive crescent moon lens A4 is made of ultra-low dispersion material H-FK61.
Further, it is respectively arranged with rectangle flange positioned at the front and back ends of camera lens, the lower part of the rectangle flange is equal
It is fixedly connected into bridge architecture with the bottom plate positioned at camera lens bottom.
Further, focus adjusting mechanism is provided in camera lens, the focus adjusting mechanism includes the focusing electricity being installed on outside body tube
Thermomechanical components and preceding group of microscope base for being internally provided with preceding fixed lens group A are organized microscope base before described and are installed in body tube；The focusing
The motor output end of electric machine assembly is provided with gear, and the external toothing of the gear and the focusing ring being placed on body tube is mutually nibbled
It closes, interval on microscope base is organized before described and is laid with several focusing guide pins, the focusing guide pin is disposed through the translot on body tube
It is connected with the cam path being opened on focusing ring and makees rotational motion to linear motion for realizing organizing the opposite body tube of microscope base before guiding.
Further, the front and back end of the focusing ring 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, zoom mechanism is additionally provided in camera lens, the zoom mechanism includes being installed on body tube rear outside
Zoom electric machine assembly and be set to the zoom microscope base and compensation microscope base of body tube posterior medial, be provided in the zoom microscope base
Zoom lens group B is provided with offset lens group C in the compensation microscope base, compensates microscope base and zoom microscope base correspondence is placed on setting
The front and back end of two parallel guide rods in body tube, gear on the zoom electric machine assembly output end through third wheel with respectively with essence
The gear of close potentiometer and the gear of cam being placed on body tube are meshed, offered on the cam zoom curved groove and
Compensated curve slot, be provided on the zoom microscope base with the matched zoom guide pin of zoom curved groove, set on the compensation microscope base
It is equipped with and the matched compensation guide pin of compensated curve slot.
Further, the front and back end of the cam is correspondingly arranged in the matched preceding accurate steel balls of body tube and rear precision
Steel ball, and the cam lock collar through being bolted in primary mirror tube rear end is pressed on body tube, and zoom is provided on the zoom microscope base
The front end of guide sleeve, the guide rod is connected across zoom guide sleeve with body tube, and compensation guide sleeve, institute are provided on the compensation microscope base
The rear end for stating guide rod passes through compensation guide sleeve to be connected with body tube.
Further, be equipped on the zoom guide pin with the matched zoom roller of zoom curved groove, and leveled with a roller through zoom
Sub- clamp ring is lock onto on zoom guide pin；Be equipped on the compensation guide pin with the matched compensation roller of compensated curve slot, and
Compensated roller clamp ring is lock onto on compensation guide pin.
Compared with prior art, the present invention has the following advantages：The present invention is conducive to improve using positive group collocation structure
The characteristics of focal length resolution ratio, the focal power ability to take the burden of the highest preceding fixed lens group of axis glazed thread height is improved, and used
A piece of ED（Ultra-low dispersion）Material significantly reduces the aberrations such as optical lens second order spectrum, and the resolution ratio of camera lens is made significantly to carry
Height can be adapted to high-definition video camera；Reasonably combined material makes system have stronger Acclimation temperature ability, as far as possible
Temperature focussing frequency is reduced, system reliability is improved；The advantage that moving parts helical pitch is relatively uniform in collocation structure is organized using positive,
It is further constrained, reduce movement helical pitch and makes zoom, compensation campaign component helical pitch as possible uniformly to reduce movement load.Profit
Cam curve is optimized repeatedly with the macro language programs write, cam angle further homogenizes when adjacent fields of view being made to switch；Needle
To just organizing the longer disadvantage of collocation structure optics overall length, remote structure is taken the photograph in the introducing of rear fixed lens group so that system has compact
Change, light-weighted feature.
Description of the drawings
Fig. 1 is the light channel structure schematic diagram of the present invention；
MTF figures when Fig. 2 is the focal length of the present invention；
MTF figures when Fig. 3 is the short focus of the present invention；
Fig. 4 is the lens construction schematic diagram of the present invention；
Fig. 5 is the vertical 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 schematic diagram of the focus adjusting mechanism of the present invention；
Fig. 8 is the structural schematic diagram of the zoom mechanism of the present invention；
Fig. 9 is the areas the A enlarged drawing with 8 of the present invention；
In figure：Accurate steel before 1- cam cover 2- screw 3- zoom microscope base 4- guide rod 5- body tube 51- translots 6-
Ball 7- third wheel 8- zoom guide pin 9- zoom roller clamp ring 10- zoom roller 11- precision potentiator 12- zoom guide sleeves
13- zoom motor component 14- cams 15- compensation guide sleeve 16- compensation roller clamp ring 17- compensation guide pins 18- compensates roller
Accurate steel balls 20- cam lock collars 21- compensates microscope base 22- optical axis 23- focusing ring clamp ring 24- accurate steel balls after 19-
Microscope base 28- focusing guide pin 30- focusing electric machine assembly 30a- gear 31- optical axises are organized before 26- focusing ring 26a- cam paths 27-
32-CCD camera assembly 33- control module component 34- bottom plate 35- zoom microswitch component 36- Iris motor components
The positive crescent moon lens A3- of fixed lens group A1- biconvex lens A2- bear the second positive crescent moon lens B- of crescent moon lens A4- and become before A-
Times lens group B1- the second negative crescent moon lens B2- the second biconvex lens B3- biconcave lens C- offset lens group C1- third is double
It is solid after negative the 4th positive crescent moon lens D- iris diaphgrams E- of biconvex lens C4- thirds of crescent moon lens C3- of convex lens C2- thirds
The 4th positive crescent moon lens E3- planoconvex spotlights E4- third biconcave lens E5- of fix-focus lens group the second biconcave lens of E1- E2-
Five biconvex microscope groups.
Specific implementation mode
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and coordinate attached drawing, make detailed
It is carefully described as follows, but the present invention is not limited thereto.
With reference to figure 1
The high definition continuous vari-focus pick-up lens that visual field is switched fast under a kind of low temperature environment, including along light incident direction according to
It is secondary to be laid in camera lens and focal power is positive preceding fixed lens group A, focal power is negative Zoom lens group B, focal power
It is negative rear fixed lens group E for positive offset lens group C, iris diaphgram D and focal power；The preceding fixed lens group is successively
It is provided with biconvex lens A1, positive crescent moon lens A2 and the made of the positive crescent moon lens A4 contiguity of negative crescent moon lens A3 and second
One gluing unit；The Zoom lens group is provided with second made of the second negative crescent moon lens B1 and the second biconvex lens B2 contiguity
Gluing unit, biconcave lens B3；The offset lens group is disposed with third biconvex lens C1, crescent moon lens C2 is born by third and
Third gluing unit, the positive crescent moon lens C4 of third made of 4th biconvex lens C3 contiguity；Fixed lens group is set gradually after described
Have the second biconcave lens E1, the 4th positive crescent moon lens E2, planoconvex spotlight E3, by third biconcave lens E4 and the 5th biconvex microscope group E5
4th gluing unit made of contiguity.
In the present embodiment, along light incident direction, the airspace between the preceding fixed lens group and Zoom lens group
It 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
Airspace between rear fixed lens group E is 2.4~18.4mm.
In the present embodiment, in the preceding fixed lens group A, the airspace between biconvex lens A1 and positive crescent moon lens A2
It is 0.5mm, the airspace between positive crescent moon lens A2 and the first gluing unit is 3.5mm；In the Zoom lens group B, second
Airspace between gluing unit and biconcave lens B3 is 5.5mm；In the offset lens group C, biconvex lens C1 and third glue
Airspace between being combined is 0.25mm, and the airspace between third gluing unit and the positive crescent moon lens C4 of third is
0.25mm；After described in fixed lens group E, the airspace between the positive crescent moon lens E2 of the second biconcave lens E1 and the 4th is
Airspace between 1mm, the 4th positive crescent moon lens E2 and planoconvex spotlight E3 is 16mm, planoconvex spotlight E3 and the 4th gluing unit it
Between airspace be 1.2mm.
In the present embodiment, the second positive crescent moon lens A4 is made of ultra-low dispersion material H-FK61.
Zoom multiple of the present invention is larger, but system overall length is shorter, theoretically speaking the initial configuration ratio of selection compensation for negative group
It is advantageous to reduce design difficulty in improving image quality, reduce number of lenses.But in compensation for negative group structure, the movement 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 extremely uneven, it is difficult to realize that visual field is switched fast,
Therefore select just to organize the initial configuration of compensation as starting point.This structure zoom group and the movement helical pitch distribution of compensation group are more equal
It is even, be conducive to visual field and be switched fast；Degree of freedom is larger in terms of the selection of glass material, and the temperature for advantageously reducing system is sensitive
Property, temperature focussing frequency is reduced, reliability is improved, but in optimization system image quality, reduction system overall length, raising transmitance side
Face difficulty is larger.
In optical design, preceding fixed lens group A is complicated, increases a positive lens, and select ED（Ultralow color
It dissipates）Optical material improves the focal power ability to take the burden of the highest preceding fixed group of axis glazed thread height, significantly reduces in this way
The aberrations such as optical lens second order spectrum, resolution ratio are significantly improved, and reach super mega pixel level, can be taken the photograph with high-definition
Camera is adapted to.The movement helical pitch of further constrained motion component, constrained motion component total weight, and make zoom, compensation campaign group
Part helical pitch is as possible uniformly to reduce movement load.Improve fast switching capability；And the optimization movement of the macro language programs by writing
Curve allows the cam of adjacent fields of view to switch corner and more homogenizes；The longer disadvantage of collocation structure optics overall length is organized for positive,
Fixed group, which introduces, afterwards takes the photograph remote structure so that system has the characteristics that densification, light-weighted.
The pick-up lens being made of above-mentioned lens set can reach following technical indicator：
1, focal length：F '=34mm~300mm ± 1.5%；
2, relative aperture：′=1/5.2；
3, resolution of lens：" CCD camera video camera (resolution ratio 1024*768, pixel dimension with mega pixel 1/3
4.65umX4.65um) adaptation；
5, fine tuning is focused；Camera lens, which has, focuses fine tuning fine adjustment function.
6, it focuses whole zooming time and is 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, it vibrates：Amplitude 0.01g2/ Hg, 5~500 H of frequency exist；
10, camera lens appearance and size：85*85*195；
11, weight：Light-weight design is not more than 1.95kg；
12, fixed 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 switching time Tc≤1.5sec；
13, optical axis answers precision：Big visual field L：0.05 dense bit：Middle visual field M：0.1 dense bit：Small field of view S：0.15 dense bit.
In the present embodiment, the rear end of the body tube is connected with CCD camera component 32, on the CCD camera component
It is provided with control module component 33.Body tube lower part is provided with bottom plate 34, and it is micro- to be provided with zoom on the downside of the middle part of body tube
Dynamic switch module 35, it is that 195mm (takes the photograph containing CCD that the rear side end lower part of body tube, which is additionally provided with 36. camera lens overall length of Iris motor component,
Camera), width 85mm, high 85mm.In order to bear amplitude 0.01g2/ Hg, vibration and the small form factor requirements that frequency is 5~500Hg,
We use bridge-type coupling structure as shown in Figures 4 to 6, and rectangle flange, institute are respectively arranged with positioned at the front and back ends of camera lens
The lower part for stating rectangle flange is fixedly connected into bridge architecture with the bottom plate positioned at camera lens bottom.Select bottom plate appropriate thick
Degree reduces the center of gravity of system as far as possible, to increase the resonant frequency of camera lens, avoids generating resonance at low frequency, to improve mirror
The resistance to shock of head.The baseboard material is：LY12-cz duralumin, thickness 10.5mm, a height of 42.5mm in center of system.This
After model machine adjustment, vibrated, impact experiment.Experimental result does not generate covibration in vibration frequency section.Optical axis answers precision：
Big visual field L：Less than 0.03 dense bit：Middle visual field M：Less than 0.7 dense bit：Small field of view S：Less than 0.12 dense bit：Meet technical conditions to want
It asks.
In the present embodiment, in order to meet the requirement of operating temperature, (i.e. 60 DEG C of high temperature, when -40 DEG C of low temperature, system will not be by
The influence of thermal stress, and eyeglass is made to generate flexural deformation, to influence the image quality of product), it is desirable that the preceding group lens barrel of selection
Material expand coefficient it is smaller, and with the expansion coefficient similar of glass.By distribution type, select and glass material coefficient of expansion phase
Materials of the close low-alloy steel 16Mn as preceding group lens barrel, the coefficient of expansion are 8.31 × 10-6Mm/ DEG C and glass material 8 × 10-6Mm/ DEG C very close.Can ensure in this way in temperature is tested (temperature change 100 DEG C in the case of), frame and glass it is swollen
It is swollen（It shrinks）Difference is much smaller than frame and glass.
In the present embodiment, as shown in fig. 7, being provided with focus adjusting mechanism in camera lens, the focus adjusting mechanism includes being installed on primary mirror
Focusing electric machine assembly 30 outside cylinder and preceding group of microscope base 27 for being internally provided with preceding fixed lens group A, organize microscope base before described and are installed on
In body tube 5；The motor output end of the focusing electric machine assembly is provided with gear 30a, the gear and is placed on body tube
The external toothing of focusing ring 26 be meshed, it is described before group microscope base upper edge circumferentially-spaced laying there are 3 focusing guide pins, the focusing to lead
The translot 51 being disposed through on body tube is followed closely with the cam path 26a being opened on focusing ring to be connected for realizing group before guiding
Microscope base makees rotational motion to linear motion with respect to body tube.The front and back end of the focusing ring is respectively arranged with accurate steel balls 24, and through being spirally connected
Focusing ring clamp ring 23 in body tube front end is pressed on body tube, and sliding friction when to make focusing ring rotate is changed into
Rolling friction, to reduce frictional force when cam movement.When the electrical power for electric machine assembly of focusing, rotor does forward and reverse fortune
Dynamic, the gear focused on electric machine assembly drives focusing ring to make forward and reverse movement by engagement, and focusing ring is uniformly distributed convex by three
Race drives three uniformly distributed focusing guide pins to make forward and reverse movement, and three uniformly distributed focusing guide pins are straight in three uniformly distributed body tubes
Under the position-limiting action of slot, preceding group lens barrel is driven, forward and reverse linear motion is made, to drive the preceding fixed lens group of camera lens to make just
Reversed linear motion realizes the purpose of system focusing.
This example uses：The gear that electric machine assembly gear engagement circle of focusing is Φ 12.The decelerating through motor of focusing electric machine assembly
Case reduction ratio 256：1, focusing Rated motor rotating speed is 6510 revs/min, and the engagement circle of focusing ring is Φ 76mm.Three on focusing ring
The focusing helical pitch of uniformly distributed cam path is 0.7mm, rotation angle 71.50.Therefore the focusing component whole process focusing time t of this example
For：t=（1/ motor speed）×（The reduction ratio of reduction box）×（Focusing ring engages circular diameter/motor gear diameter）×（Focusing ring
Rotation angle/360 °）=2.97 seconds.Meet and focuses the requirement that whole zooming time is not more than 4sec.
In the present embodiment, as shown in Figure 8 and Figure 9, zoom mechanism is additionally provided in camera lens, the zoom mechanism includes installation
In body tube rear outside zoom electric machine assembly 13 and be set to body tube posterior medial zoom microscope base 3 and compensation microscope base
21, be provided with Zoom lens group B in the zoom microscope base, be provided with offset lens group C in the compensation microscope base, compensation microscope base and
Zoom microscope base corresponds to the front and back end for being placed on two parallel guide rods 4 being arranged in body tube, and the front end of the guide rod is through camb cap
Plate 1 is fixed on body tube 5, and the cam cover is provided with the screw 2 being connected with body tube.The zoom electric machine assembly is defeated
Gear in outlet is through third wheel 7 and the gear phase respectively with the gear of precision potentiator 11 and the cam being placed on body tube 14
It engages, by zoom curved groove and compensated curve slot in the requirement milling of the optical zoom equation of motion, the zoom mirror on the cam
Be provided on seat with the matched zoom guide pin 8 of zoom curved groove, be provided on the compensation microscope base and the matching of compensated curve slot
The compensation guide pin 17 of conjunction.
In the present embodiment, the front and back end of the cam 14 is correspondingly arranged in matched 6 He of preceding accurate steel balls of body tube
Accurate steel balls 19 afterwards, and the cam lock collar 20 through being bolted in primary mirror tube rear end is pressed on body tube, when cam is rotated
Sliding friction is changed into rolling friction, to reduce frictional force when cam movement.The zoom microscope base, which tightens, is furnished with zoom guide sleeve
12, the front end of the guide rod 4 is connected across zoom guide sleeve with body tube, and the compensation microscope base is tightened equipped with compensation guide sleeve 15,
The rear end of the guide rod passes through compensation guide sleeve to be connected with body tube, to realize that compensation microscope base and zoom microscope base are nested in guide rod
On.
In the present embodiment, be equipped on the zoom guide pin 8 with the matched zoom roller 10 of zoom curved groove, and through become
Times roller clamp ring 9 is lock onto on zoom guide pin；It is equipped on the compensation guide pin and is leveled with a roller with the matched compensation of compensated curve slot
Son 18, and compensated roller clamp ring 16 is lock onto on compensation guide pin.
When the motor of zoom motor component makees positive and negative rotary motion,（Motor gear passes through third wheel and precision potentiator tooth
Wheel, cam wheel engagement rotation）Make precision potentiator and cam synchronous rotary.Pass through zoom, compensated curve slot and zoom guide pin
Component, compensation guide pin component drive zoom microscope base, compensation microscope base to be moved in the way of zoom, compensated curve slot.Two guide rods rise
To support, and change zoom microscope base, compensation microscope base from rotary motion as linear motion.Zoom guide sleeve, compensation guide sleeve be for
Increase the length that is slidably matched, increases stationarity when zoom microscope base, compensation microscope base movement.It is rotated in this way by motor and realizes change
Times microscope base, compensation microscope base make tandem movement by the zoom equation of motion requirements, change to make the focal length of system generate.When being
When the focal length of system changes, the gear of precision potentiator is engaged by third wheel, and precision potentiator is made to rotate, then precision potentiator
Resistance value change, the changing value of precision potentiator can be taken out by sample circuit appropriate, and be transmitted to control centre, from
And realize the display of zoom level.
In order to realize that visual field is switched fast under low temperature environment requirement, zoom guide sleeve, compensation guide sleeve are identical as guide rod
Material.It is identical when gap in low temperature between zoom guide sleeve, compensation guide sleeve and guide rod is with room temperature since the swollen coefficient of temperature is identical.
It avoids in low temperature gap between zoom guide sleeve, compensation guide sleeve and guide rod to become smaller, frictional force rapidly rises, and load rapidly increases
Greatly, adjacent fields of view switching time is slack-off, so that stuck phenomenon.
It is switched fast speed in order to further increase visual field under low temperature environment, as shown in figure 8, adopting with molybdenum disulfide roller
Zoom guide pin component substitutes.I.e. zoom roller 10 is mounted on zoom guide pin 8, and the locking of zoom roller clamp ring 9 is used in combination to make zoom
Roller can roll in cam zoom curved groove, and the sliding friction that zoom guide pin moves in curved groove, which is changed into rolling, to rub
It wipes, to reduce frictional force when cam is moved with zoom guide pin.Similarly replaced using the compensation guide pin component with molybdenum disulfide roller
In generation, reduces cam and improves and regarded under low temperature environment to reduce the load under low temperature environment with frictional force when compensating guide pin movement
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 component is Φ 17mm, electricity
The reduction ratio of machine reduction box uses 76:1, Rated motor rate is 5460 revs/min, and the maximum helical pitch of zoom cam visual field switching is
77.66 °, therefore the maximum duration t of variable focus package visual field switching is：t=（1/ motor speed）×（The reduction 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 switching time Tc≤1.5sec.
The foregoing is merely presently preferred embodiments of the present invention, for the ordinary skill in the art, according to this hair
Bright introduction is designed the high definition continuous vari-focus pick-up lens that visual field under various forms of low temperature environments is switched fast and is not needed to
Performing creative labour, without departing from the principles and spirit of the present invention it is all done according to scope of the present invention patent it is equal
Equal change, modification, replacement and modification, should all belong to the covering scope of the present invention.
Claims (8)
1. the high definition continuous vari-focus pick-up lens that visual field is switched fast under a kind of low temperature environment, which is characterized in that camera lens includes edge
The focal power that light incident direction is laid successively is positive preceding fixed lens group A, focal power is negative Zoom lens group B, light focus
Degree is that positive offset lens group C, iris diaphgram D and focal power are negative rear fixed lens group E；The preceding fixed lens group according to
It is secondary to be provided with biconvex lens A1, positive crescent moon lens A2 and made of the positive crescent moon lens A4 contiguity of negative crescent moon lens A3 and second
First gluing unit；The Zoom lens group is provided with made of the second negative crescent moon lens B1 and the second biconvex lens B2 contiguity the
Two gluing units, biconcave lens B3；The offset lens group is disposed with third biconvex lens C1, bears crescent moon lens C2 by third
With third gluing unit, the positive crescent moon lens C4 of third made of the 4th biconvex lens C3 contiguity；Fixed lens group is set successively after described
Be equipped with the second biconcave lens E1, the 4th positive crescent moon lens E2, planoconvex spotlight E3, by third biconcave lens E4 and the 5th biconvex microscope group
4th gluing unit made of E5 contiguity；Airspace between the preceding fixed lens group and Zoom lens group is 18.1~
Airspace between 47.2mm, Zoom lens group B and offset lens group C is 2.9~48mm, and offset lens group C is fixed with rear
Airspace between lens group E is 2.4~18.4mm；In the preceding fixed lens group A, biconvex lens A1 and positive crescent moon lens
Airspace between A2 is 0.5mm, and the airspace between positive crescent moon lens A2 and the first gluing unit is 3.5mm；The change
In times lens group B, the airspace between the second gluing unit and biconcave lens B3 is 5.5mm；In the offset lens group C, the
Airspace between three biconvex lens C1 and third gluing unit is 0.25mm, third gluing unit and the positive crescent moon lens C4 of third it
Between airspace be 0.25mm；After described in fixed lens group E, between the positive crescent moon lens E2 of the second biconcave lens E1 and the 4th
Airspace be 1mm, the airspace between the 4th positive crescent moon lens E2 and planoconvex spotlight E3 is 16mm, planoconvex spotlight E3 with
Airspace between 4th gluing unit is 1.2mm.
2. the high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment according to claim 1, feature
It is, the second positive crescent moon lens A4 is made of ultra-low dispersion material H-FK61.
3. the high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment according to claim 1, feature
Be, rectangle flange be respectively arranged with positioned at the front and back ends of camera lens, the lower part of the rectangle flange with positioned at camera lens bottom
The bottom plate in portion is fixedly connected into bridge architecture.
4. the high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment according to claim 1, feature
It is, focus adjusting mechanism is provided in camera lens, and the focus adjusting mechanism includes the focusing electric machine assembly being installed on outside body tube and inside
The preceding group of microscope base of fixed lens group A before being provided with is organized microscope base before described and is installed in body tube；The electricity of the focusing electric machine assembly
Machine output end is provided with gear, and the gear is meshed with the external toothing for the focusing ring being placed on body tube, and mirror is organized before described
Interval is laid with several focusing guide pins on seat, the translot and be opened in focusing ring that the focusing guide pin is disposed through on body tube
On cam path be connected and make rotational motion to linear motion with respect to body tube for realizing organizing microscope base before guiding.
5. the high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment according to claim 4, feature
It is, the front and back end of the focusing ring is respectively arranged with accurate steel balls, and the focusing ring clamp ring through being bolted in body tube front end
It is pressed on body tube.
6. the high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment according to claim 1 or 4, special
Sign is, zoom mechanism is additionally provided in camera lens, and the zoom mechanism includes being installed on the zoom motor of body tube rear outside
Component and the zoom microscope base and compensation microscope base for being set to body tube posterior medial, are provided with Zoom lens group in the zoom microscope base
B is provided with offset lens group C in the compensation microscope base, compensates microscope base and zoom microscope base correspondence is placed on and is arranged in body tube
Two parallel guide rods front and back end, gear on the zoom electric machine assembly output end through third wheel with respectively with precision potentiator
The gear of gear and the cam being placed on body tube is meshed, and zoom curved groove and compensated curve are offered on the cam
Slot, be provided on the zoom microscope base with the matched zoom guide pin of zoom curved groove, be provided with and mend on the compensation microscope base
Repay the matched compensation guide pin of curved groove.
7. the high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment according to claim 6, feature
It is, the front and back end of the cam is correspondingly arranged in the matched preceding accurate steel balls of body tube and rear accurate steel balls, and through spiral shell
The cam lock collar for being connected to primary mirror tube rear end is pressed on body tube, and zoom guide sleeve is provided on the zoom microscope base, described to lead
The front end of bar is connected across zoom guide sleeve with body tube, is provided with compensation guide sleeve on the compensation microscope base, after the guide rod
End is connected across compensation guide sleeve with body tube.
8. the high definition continuous vari-focus pick-up lens that visual field is switched fast under low temperature environment according to claim 6, feature
Be, be equipped on the zoom guide pin with the matched zoom roller of zoom curved groove, and through zoom roller clamp ring lock
In on zoom guide pin；Be equipped on the compensation guide pin with the matched compensation roller of compensated curve slot, and compensated roller lock
Collar is lock onto on compensation guide pin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN106199934A CN106199934A (en) | 2016-12-07 |
| CN106199934B true CN106199934B (en) | 2018-07-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065154B (en) * | 2017-06-08 | 2022-11-08 | 西安中科飞图光电科技有限公司 | Compact continuous zoom optical system |
| 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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|---|---|---|---|---|
| JP2000275519A (en) * | 1999-03-24 | 2000-10-06 | Fuji Photo Optical Co Ltd | Zoom lens |
| JP2001021798A (en) * | 1999-07-02 | 2001-01-26 | Asahi Optical Co Ltd | Telephoto macro-lens system |
| US6246833B1 (en) * | 1998-02-19 | 2001-06-12 | Canon Kabushiki Kaisha | Photographic lens and photographing apparatus having the same |
| CN103744168A (en) * | 2013-12-25 | 2014-04-23 | 福建福光数码科技有限公司 | Airborne zoom lens with high resolution and large zoom ratio |
| CN206039019U (en) * | 2016-08-27 | 2017-03-22 | 福建福光股份有限公司 | Visual field fast switch over high definition continuous zooming's optical structure and camera lens under low temperature environment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4994796B2 (en) * | 2006-11-14 | 2012-08-08 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
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- 2016-08-27 CN CN201610732873.0A patent/CN106199934B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6246833B1 (en) * | 1998-02-19 | 2001-06-12 | Canon Kabushiki Kaisha | Photographic lens and photographing apparatus having the same |
| JP2000275519A (en) * | 1999-03-24 | 2000-10-06 | Fuji Photo Optical Co Ltd | Zoom lens |
| JP2001021798A (en) * | 1999-07-02 | 2001-01-26 | Asahi Optical Co Ltd | Telephoto macro-lens system |
| CN103744168A (en) * | 2013-12-25 | 2014-04-23 | 福建福光数码科技有限公司 | Airborne zoom lens with high resolution and large zoom ratio |
| CN206039019U (en) * | 2016-08-27 | 2017-03-22 | 福建福光股份有限公司 | Visual field fast switch over high definition continuous zooming's optical structure and camera lens under low temperature environment |
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| CN106199934A (en) | 2016-12-07 |
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