CN106405804A - Object distance adjustable finite distance conjugate distance optical zoom system - Google Patents
Object distance adjustable finite distance conjugate distance optical zoom system Download PDFInfo
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- CN106405804A CN106405804A CN201610929892.2A CN201610929892A CN106405804A CN 106405804 A CN106405804 A CN 106405804A CN 201610929892 A CN201610929892 A CN 201610929892A CN 106405804 A CN106405804 A CN 106405804A
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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
- G02B15/17—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--
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Abstract
The invention provides an object distance adjustable finite distance conjugate distance optical zoom system which comprises an object distance adjustment lens set, a magnification lens set, a compensation lens set and a rear fixed lens set, wherein the object distance adjustment lens set, the magnification lens set, the compensation lens set and the rear fixed lens set are arranged in sequence along the optical axis. The object distance adjustment lens set can move in the direction of the optical axis to clearly image object surfaces of different object distances on an image plane at a fixed position. Without moving the object surfaces or the entire zoom system, the object surfaces with great fluctuations can be clearly observed.
Description
Technical field
The present invention relates to optical instrument field is and in particular to a kind of adjustable limited remote conjugate distance optical zoom system of object distance
System.
Background technology
In imaging optical system evolution, a class demand is had to be to enter line search first with optical system to target to look into
Look for, and after finding, blur-free imaging and identification are carried out to the minutia of this target.In order to meet this kind of demand, develop focal length
Optical system-the varifocal optical system that can change.Zoom refers to that focal length continuously changes within the specific limits and image planes position is protected
Hold constant optical system.The purpose changing focal length is continuously to change the enlargement ratio of system, and the size of image planes scenery is continuous
Variable, make the sensation that observer produces from the close-by examples to those far off or draws near.According to optical system imaging characteristic, the shorter optics of focal length
System, is characterized in that visual field is big, resolution ratio is low；On the contrary, the longer optical system of focal length, is characterized in that visual field is little, high resolution.
Just because of this, varifocal optical system is particularly suitable for the first feature searching target with the big visual field of short focus, is then adjusted to focal length
Away from small field of view, the target detail feature searching is accurately identified.
From varifocal optical system composition, generally this system is divided into four parts：First fixing group, zoom group, compensation group
With latter fixing group.Wherein front fixing group is responsible for for the light beam in big for outside field range carrying out bore constraint the light so that below
Group bore is little, and design and processing are relatively easy.Zoom group is responsible for the change focusing, with the focal length required for producing.Compensate
Group be responsible for compensate zoom group focusing control change introduce image planes change in location it is ensured that compensate after image planes position motionless.Fixing group master afterwards
The correction of residual aberration to be responsible for, to ensure image quality in whole zooming procedure for the optical system.Aforementioned four optics group
Part is the basic composition form of zoom system, pancreatic system, and advanced zoom system, pancreatic system is all to be developed by this structure optimization.
At present, the development relative maturity of varifocal optical system, market occurs in that all kinds of commercialization zoom system, pancreatic systems.As limited remote
Conjugate distance zoom system, pancreatic system, infinity conjugate distance zoom system, pancreatic system etc..Wherein, the former is mainly used in zoom microcobjective system；The latter
It is mainly used in zoom photographic system and telescopic system.In zoom microcobjective system, usual thing, image planes all maintain static
, this zoom system, pancreatic system is applied to most of application scenarios.But, for some special screnes, such as object plane fluctuates very
Greatly, or space multistory sense is very strong, then traditional thing, image planes are all fixed zoom system, pancreatic systems is not enough, need
Move object plane or mobile whole varifocus objective just enables the blur-free imaging of different object planes.
Additionally, in zoom system, pancreatic system, the moving direction of compensation group is generally not dull along optical axis direction, but first exists
One side moves up, and after reaching an extreme value, then moves round about, has a reverse process, for example, by short focus
During changing to focal length, compensation group first moves along optical axis negative direction, has the extreme point of a direction in midway, passes through this
After individual extreme point, compensation group moves along optical axis positive direction again, until reaching focal length position.Due to this nonmonotonicity, lead
The lift angle in optical structure design zoom cam curve is caused to become big, processing becomes difficult, it sometimes appear that clamping stagnation, or even stuck
Phenomenon, leads to the damage of focusing motor and burns.
Content of the invention
In view of above-mentioned technical problem, in order to overcome the above-mentioned deficiencies of the prior art, it is adjustable that the present invention proposes a kind of object distance
Limited remote conjugate distance optical focal distance setting system.
According to an aspect of the invention, it is provided a kind of adjustable limited remote conjugate distance optical focal distance setting system of object distance includes
Along the optical axis successively tune object distance microscope group of order setting, zoom microscope group, compensate microscope group and fix microscope group afterwards, tune object distance microscope group being capable of edge
Optical axis direction move, in order to by the object plane of different object distances in the image planes of fixed position blur-free imaging.
Preferably, zoom microscope group and compensate microscope group in unidirectional zooming procedure along the equal single-way moving of optical axis direction.
Preferably, the adjustable limited remote conjugate distance optical focal distance setting system of object distance also includes adjusting object distance cam canister, on its side wall
It is provided with along described the first cam curve adjusting object distance cam canister axial direction one-way spiral to extend；Setting in described tune object distance cam canister
Adjust object distance microscope group fixture, for clamping described tune object distance microscope group；It is provided with the first guide pin on described tune object distance microscope group fixture,
Described first guide pin is embedded in described first cam curve, and by rotating described tune object distance cam canister, described first leads
Move to pin along described first cam curve, described tune object distance microscope group fixture drives described tune object distance microscope group along optical axis direction list
To movement.
Preferably, the adjustable limited remote conjugate distance optical focal distance setting system of object distance also includes zoom compensation cam canister, its side wall
On be provided with along described zoom compensate cam canister axial direction one-way spiral extend the second cam curve and the 3rd cam curve, described
Zoom compensates setting zoom microscope group fixture and compensation microscope group fixture in cam canister；Described zoom microscope group fixture clamps described zoom mirror
Group, arranges the second guide pin thereon, and described second guide pin is embedded in described second cam curve；Described compensation microscope group
Fixture, for clamping described compensation microscope group microscope group, arranges the 3rd guide pin, described 3rd guide pin is embedded in described thereon
In 3rd cam curve；Compensate cam canister by rotating described zoom, described second guide pin and the 3rd guide pin are respectively
Move along described second cam curve and described second cam curve, described zoom microscope group fixture and compensation microscope group fixture carry respectively
Dynamic zoom microscope group and compensate microscope group in unidirectional zooming procedure along optical axis direction single-way linkage.
Preferably, the focal power adjusting object distance microscope group is on the occasion of it includes the tune object distance gluing microscope group of positive light coke and positive light
The tune object distance simple lens of focal power.
Preferably, the focal power of zoom microscope group is negative value, and it includes the zoom simple lens of negative power and negative power
Zoom gluing microscope group.
Preferably, the focal power compensating microscope group is negative value, and it is the compensation gluing microscope group of negative power.
Preferably, the focal power fixing microscope group afterwards is on the occasion of it includes the rear of positive light coke and fixes the first simple lens, positive light
Focal power rear fix the first glued microscope group, negative power rear fix the second simple lens, positive light coke rear fix the 3rd single thoroughly
Mirror and the rear of positive light coke fix the second glued microscope group.
Preferably, the tune object distance gluing microscope group of positive light coke includes tune object distance gluing front lens and positive light Jiao of negative power
The tune object distance gluing rear lenses of degree.
Preferably, the zoom gluing microscope group of negative power includes zoom gluing front lens and the positive light coke of negative power
Zoom gluing rear lenses.
Preferably, negative power compensate that glued microscope group includes negative power compensate glued front lens and positive light coke
Compensate glued rear lenses.
Preferably, positive light coke rear fix the first glued microscope group and include the rear of positive light coke fix the first glued front lens
Rear with negative power fixes the first glued rear lenses.
Preferably, positive light coke rear fix the second glued microscope group by negative power rear fix the second glued front lens and
The rear of positive light coke fixes the second glued rear lenses.
Preferably, in above-mentioned each balsaming lens group, glued front lens is the glass material of little Abbe number, and glued rear lenses are
The glass material of big Abbe number, both are all higher than 25 at Abbe number difference.
Preferably, adjust the focal length f of object distance microscope group2For 96mm～122mm, the focal length f of zoom microscope group3For -25mm～-32mm,
Compensate the focal length f of microscope group4For -25mm～-42mm, fix the focal length f of microscope group afterwards5For 24mm～32mm.
Preferably, adjust the focal length f of object distance microscope group2For 106mm, the focal length f of zoom microscope group3For -29.5mm, compensate microscope group
Focal length f4For -32.5mm, fix the focal length f of microscope group afterwards5For 27.9mm.
Preferably, the scope of object distance is 340mm～380mm.
Preferably, limited remote conjugate distance optical focal distance setting system includes imageing sensor, is arranged at described image planes position, is used for
Receive imaging.
From technique scheme as can be seen that the invention has the advantages that：
Clear observation in the case of realizing not moving object plane or whole zoom system, pancreatic system using tune object distance microscope group fluctuates
Big object plane；
From the big visual field of short focus to long-focus small field of view or contrary zooming procedure, compensation group be moved along optical axis side
To for dull, zoom cam cutting is easy；
Object distance microscope group and zoom group is adjusted not collide interference；
Using balsaming lens correcting chromatic aberration.
Brief description
Fig. 1 is the structural representation of the limited remote conjugate distance optical focal distance setting system of the present invention for the embodiment of the present invention；
Fig. 2 is to adjust the corresponding structural representation adjusting object distance cam canister of object distance microscope group in Fig. 1；
Fig. 3 is zoom microscope group and the structural representation compensating microscope group corresponding zoom compensation cam canister in Fig. 1；
Fig. 4 is the schematic diagram of optical focal distance setting system zoom in Fig. 1；
Fig. 5 is object distance change schematic diagram during optical focal distance setting system short focus position in Fig. 1；
Fig. 6 is object distance change schematic diagram during burnt position in optical focal distance setting system in Fig. 1；
Fig. 7 is object distance change schematic diagram during optical focal distance setting system focal length position in Fig. 1；
In Fig. 8 (a) -8 (c) Fig. 1 optical focal distance setting system when object distance is for 340mm respectively in the picture of short focus, middle burnt and focal length
Difference-visual field curve；
In Fig. 9 (a) -9 (c) Fig. 1 optical focal distance setting system when object distance is for 360mm respectively in the picture of short focus, middle burnt and focal length
Difference-visual field curve；
In Figure 10 (a) -10 (c) Fig. 1 optical focal distance setting system when object distance is for 380mm respectively in short focus, middle burnt and focal length
Aberration-visual field curve.
【Main element】
1- object plane；2- adjusts object distance microscope group；3- zoom microscope group；4- compensates microscope group；Microscope group is fixed after 5-；
6- adjusts object distance cam canister；61- first cam curve；7- zoom compensates cam canister；
71- second cam curve；72- the 3rd cam curve.
Specific embodiment
Certain embodiments of the invention will be done with reference to appended accompanying drawing in rear and more comprehensively describe to property, some of them but not complete
The embodiment in portion will be illustrated.In fact, various embodiments of the present invention can be realized in many different forms, and should not be construed
For being limited to embodiments set forth herein；Relatively, these embodiments are provided so that the present invention meets the legal requirement being suitable for.
For making the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
Embodiments provide a kind of adjustable limited remote conjugate distance optical focal distance setting system of object distance, as shown in figure 1, bag
Include along optical axis direction order setting tune object distance microscope group 2, zoom microscope group 3, compensate microscope group 4 and afterwards fix microscope group 5, wherein compared to
Fix microscope group before limited remote conjugate distance optical focal distance setting system of the prior art and rear fixing microscope group all fix unadjustable, this
Tune object distance microscope group 2 in bright is adjustable with respect to entirely limited remote conjugate distance optical focal distance setting system position, fluctuates very in observation
It is not necessary to mobile object plane or mobile whole zoom system, pancreatic system adjust object distance mirror it is only necessary to adjust during the very strong object plane of big or third dimension
The position of group 2 can complete to observe adjusting object distance, in observation, the rear fixing microscope group 5 of optical focal distance setting system and image planes position
Fixing.
Specifically, as shown in figure 1, adjusting the focal power of object distance microscope group 2 to be on the occasion of entering row constraint to the incidence angle of incident beam
So that enter zoom group 3 beam incident angle less, reduce higher order aberratons.It is by the tune object distance gluing microscope group of positive light coke
21 and the tune object distance simple lens 22 of positive light coke form, wherein, adjust object distance gluing microscope group 21 glued by the tune object distance of negative power
Tune object distance gluing rear lenses 212 gluing of front lens 211 and positive light coke forms.The focal power of zoom microscope group 3 be negative value, it by
The zoom gluing microscope group 32 of the zoom simple lens 31 of negative power and negative power forms, and wherein, zoom gluing microscope group 32 is by bearing
Zoom gluing rear lenses 322 gluing of the zoom gluing front lens 321 of focal power and positive light coke forms.Compensate the light of microscope group 4
Focal power is negative value, it be the compensation gluing microscope group 41 of negative power wherein, compensate the compensation glue by negative power for the glued microscope group 41
Close front lens 411 and compensation gluing rear lenses 412 gluing of positive light coke forms.The focal power fixing microscope group 5 afterwards is on the occasion of use
In correction low order difference, it by positive light coke rear fix the first simple lens 51, the rear of positive light coke fixes the first glued microscope group
52nd, negative power rear fix the second simple lens 53, the rear of positive light coke fixes the rear solid of the 3rd simple lens 54 and positive light coke
Fixed second glued microscope group 55 forms, wherein, after fix the first glued microscope group 52 and fixed before the first gluing thoroughly by the rear of positive light coke
Rear first glued rear lenses 522 gluing of fixing of mirror 521 and negative power forms；After to fix the second glued microscope group 55 burnt by negative light
The rear of degree fixes the second glued front lens 551 and rear second glued rear lenses 552 gluing of fixing of positive light coke forms.The present invention
Embodiment to correct zoom system, pancreatic system aberration using 5 groups of glued microscope groups.
The optical focal distance setting system of the embodiment of the present invention can realize object distance continuously adjustabe within the specific limits, and the present invention is implemented
In example, preferably can all can realize clearly observing in 40mm excursion.Fig. 2 shows and adjusts object distance microscope group for installing
2 tune object distance cam canister 6, is provided with corresponding to the cam curve 61 adjusting object distance microscope group 2 on adjusting object distance cam canister 6 side wall, should
Cam curve 61 one-way spiral extension vertically on adjusting object distance cam canister 6 side wall, adjusts object distance microscope group 2 to pass through to adjust object distance microscope group folder
Tool is arranged in tune object distance cam canister 6, and the first guide pin on this fixture embeds in cam curve 61, adjusts object distance by rotation
The first guide pin that cam canister 6 can be realized on this fixture slides along cam curve 61, and then makes to adjust object distance microscope group 2 adjusting
In object distance cam canister 6 vertically before and after continuous moving.When being observed using the optical focal distance setting system of the present invention, adjust object distance cam
Cylinder 6 and thing to be observed between relative position keep fix, by adjust adjust object distance microscope group 2 adjust object distance cam canister 6 in position
Put and can change object distance, realize observing the object plane very big or that third dimension is very strong that fluctuates.
According to embodiments of the invention, adjust movement in adjusting object distance cam canister 6 for the object distance microscope group 2 can adopt electro-motor
Rotate and adjust object distance cam canister 6 to realize, it would however also be possible to employ manual mode rotates tune object distance cam canister 6 and realizes.
In the embodiment of the present invention, Fig. 3 shows for installing zoom microscope group 3 and the zoom compensation cam canister compensating microscope group 4
7, zoom microscope group 3 is arranged in zoom compensation cam canister 7 jointly with compensating microscope group 4, and zoom microscope group 3 is used for adjusting zoom system, pancreatic system
The change of focal length, compensate microscope group 4 be used for compensating the zoom microscope group 3 image planes change in location that causes of focusing it is ensured that image planes position all the time
Keep fixing.Zoom microscope group 3 and compensation microscope group 4 need linkage jointly to realize the constant zoom and focusing in holding image planes position.Fig. 3 shows
Go out for installing zoom microscope group 3 and the zoom compensation cam canister 7 compensating microscope group 4, compensated in zoom and arrange on cam canister 7 side wall
There is the cam curve 71 corresponding to zoom microscope group 3, and the corresponding cam curve 72 compensating microscope group 4, two cam curves are all along change
Compensate the axial one-way spiral of cam canister 7 again to extend.
Zoom microscope group 3 and compensation microscope group 4 are arranged on zoom by zoom microscope group fixture and compensation microscope group fixture respectively and compensate
In cam canister 7, the second guide pin on zoom microscope group fixture and the 3rd guide pin compensating on microscope group fixture are respectively embedded into
In cam curve 71 and cam curve 72, cam canister 7 is compensated by zoom and can realize the guide pin edge respectively on two fixtures
Cam curve 71 and cam curve 72 linkage are slided, and then make zoom microscope group 3 and compensate microscope group 4 in zoom compensation cam canister 7
Inside continuous linkage is moved in front and back vertically.In the present embodiment, cam curve 71 and cam curve 72 are and compensate cam along zoom
Cylinder 7 axial screw are unidirectionally extended, and single-arc equal error is simple, and adopt this kind of cam curve, are changed into from focal length in zoom system, pancreatic system
Short focus or be changed into during focal length from short focus, zoom microscope group 3 and compensate microscope group 4 all along cam canister 7 axial direction single-way moving.Cam
Shown in the lift angle computing formula such as formula (1) of curve 71 and cam curve 72.
In formula (1), α is lift angle, and Δ Z is the axially displaced amount of cam curve, and Δ θ is cam curve circumferentially to rotation
Angle, R is cam canister radius.
In the preferred embodiment of the present invention, the lift angle of cam curve 71 is 26.68 °, and the lift angle of cam curve 72 is 2.6 °, all
Less than 45 ° of limiting value, it is to avoid clamping stagnation in moving process for the microscope group, or even stuck phenomenon, prevent from focusing electro-motor due to
Microscope group is stuck and damages.
According to embodiments of the invention, zoom microscope group 3 and compensation microscope group 4 compensate the linkage movement in cam canister 7 in zoom
Zoom compensation cam canister 7 can be rotated using electro-motor to realize, it would however also be possible to employ manual mode rotates zoom and compensates cam
Cylinder 7 realization.
In the embodiment of the present invention, can relatively steadily and no substantially pass to flex point in optical focal distance setting system for guarantee light
Broadcast, and do not produce larger senior aberration, adjust combined focal length value f of object distance microscope group 22Optional scope is 96mm～122mm, preferably
For 106mm；Combined focal length value f of zoom microscope group 33Optional scope is -25mm～-32mm, preferably -29.5mm,；Compensate microscope group
4 combined focal length value f4Optional scope is -25mm～-42mm, preferably -32.5mm；Fix combined focal length value f of microscope group 5 afterwards5
Optional scope is 24mm～32mm, preferably 27.9mm.The present invention can be by changing the curvature half of single eyeglass in these microscope groups
The parameters such as footpath, thickness can achieve that each microscope group changes in focal range.
In the embodiment of the present invention, the optical element in each microscope group, all using sphere, reduces the one-tenth of optical manufacturing and testing
The preferable image quality that this while ensure that.
In each microscope group of the preferred embodiment of the present invention, as shown in table 1, in table, r represents each optical component parameter numerical value
Radius of curvature, d represents the distance or lens thickness between lens, ndRepresent d light refractive index (d light refer to wavelength be 588nm can
See light, be often used as evaluating the reference light of optical system), v represents the Abbe number of lens, and the unit of all length is counted with mm
Calculate.
Table 1
| Surface sequence number | Radius of curvature (r) | Distance (d) | Refractive index (nd) | Abbe number (v) |
| Object plane | ∞ | 340 | ||
| 1 | 134.900 | 3.5 | 1.75520 | 27.5 |
| 2 | 65.610 | 17.57 | 1.48749 | 70.4 |
| 3 | -399.903 | 0.6 | ||
| 4 | 68.709 | 9.35 | 1.71300 | 53.8 |
| 5 | 190.543 | A | ||
| 6 | 314.228 | 2 | 1.71300 | 53.8 |
| 7 | 22.126 | 12.5 | ||
| 8 | -68.370 | 2.17 | 1.55200 | 63.3 |
| 9 | 28.050 | 7 | 1.75520 | 27.5 |
| 10 | 349.710 | B | ||
| 11 | -26.430 | 2 | 1.69680 | 55.5 |
| 12 | 18.155 | 2.24 | 1.75520 | 27.5 |
| 13 | 103.146 | C | ||
| 15 | -1452.910 | 3.03 | 1.51640 | 64.2 |
| 16 | -28.444 | 0.6 | ||
| 17 | 69.340 | 5.63 | 1.48749 | 70.4 |
| 18 | -18.500 | 1.5 | 1.75520 | 27.5 |
| 19 | -63.530 | 4.3 | ||
| 20 | 124.965 | 2 | 1.48749 | 70.4 |
| 21 | 60.260 | 2.46 | ||
| 22 | -591.000 | 3.66 | 1.48749 | 70.4 |
| 23 | -43.376 | 0.6 | ||
| 24 | 82.410 | 2 | 1.75520 | 27.5 |
| 25 | 44.681 | 4.98 | 1.61309 | 60.5 |
| 26 | -55.919 | 60.25 | ||
| Image planes | ∞ | 0 |
As table 1, adjust in object distance microscope group gluing microscope group 21, adjust object distance microscope group gluing microscope group front lens 211 to adopt little Abbe number
Glass material, adjust object distance microscope group gluing microscope group rear lenses 212 adopt big Abbe number glass material, the gluing energy of bi-material
Enough correcting chromatic aberrations.In the same manner, zoom group gluing microscope group 32, compensation group gluing microscope group 41, afterwards the glued microscope group 52 of fixing group first and after
Fixing group the second gluing microscope group 55 is also all formed from the big glass material gluing of Abbe number difference, in order to correcting chromatic aberration.This five
In the glued mirror of group, the Abbe number difference of every group of glued mirror is both needed to, more than 25, be not limited in the concrete numerical value shown in table 1.
Wherein A, B, C are respectively and adjust object distance microscope group 2 and zoom microscope group 3, zoom microscope group 3 and compensate microscope group 4, compensate microscope group 4
With fixing microscope group 5 the distance between.
The adjustable limited remote conjugate distance optical focal distance setting system of object distance of the embodiment of the present invention instrumentality away from or carry out zoom
During, fix microscope group 5 and image planes maintain static.Imageing sensor such as CCD etc. can be adopted to receive imaging at image planes.
Fig. 4 shows the schematic diagram of three zoom positions of varifocal optical system of the present invention, and table 2 lists zoom light of the present invention
Distance between each microscope group of three zoom positions of system.Taking object distance 340mm as a example, Zoom optical be can be seen that by Fig. 4 and table 2
When system carries out zoom observation to obtain the image zooming in or out at this for a fixing object plane 1, object distance microscope group 2 position is adjusted to protect
Hold constant, zoom microscope group 3 and compensation microscope group 4 are along optical axis direction single-way moving.To be changed into as a example focal length position from short focus position, become
Times microscope group 3 with compensate microscope group 4 along optical axis from object plane to image planes direction single-way moving.
Table 2
| Spacing | Short focus position | Middle Jiao position | Focal length position |
| A(mm) | 4.5 | 44.4 | 57.9 |
| B(mm) | 59.83 | 17.43 | 3 |
| C(mm) | 2 | 4.45 | 5.52 |
Fig. 5-7 respectively illustrates the schematic diagram adjusting object distance during three zoom positions of varifocal optical system of the present invention, and table 3 arranges
Go out varifocal optical system of the present invention to adjust between object distance microscope group 2 and zoom microscope group 3 at three object distance positions of three zoom positions
Apart from A.In arbitrary zoom position, in view of object plane fluctuates, very big or third dimension is very strong, can adjust object distance by mobile
Microscope group 2 obtaining picture rich in detail, now zoom microscope group 3 and compensate microscope group 4 and remain stationary as.As shown in table 3, with short focus position it is
Example, in view of the fluctuating of object plane 11,12,13, when object distance is changed into 360mm from 340mm, then when being changed into 380mm, zoom microscope group 3
Remain stationary as with compensation microscope group 4, adjust object distance microscope group 2 by mobile, change and adjust the distance between object distance microscope group 2 and zoom microscope group 3,
It is changed into 4.4mm from 4.5mm, then is changed into 2.4mm, you can obtain picture rich in detail in same image planes.Although table 3 only gives object distance
When 340mm, 360mm and 380mm, adjust the distance between object distance microscope group 2 and zoom microscope group 3, it will be appreciated by those skilled in the art that
, in the present invention, object distance can between 340mm～380mm consecutive variations, its by object plane fluctuations determine, object distance
During for any value between 340mm～380mm, all can adjust object distance microscope group 2 by mobile, change and adjust object distance microscope group 2 and zoom
The distance between microscope group 3, obtains picture rich in detail in same image planes.Below only taking short focus position as a example illustrate, when zoom light
System is in middle Jiao position or during focal length position, fluctuates situation very big or that third dimension is very strong for object plane, can also
Object distance microscope group 2 is adjusted to obtain picture rich in detail by mobile, now zoom microscope group 3 and compensation microscope group 4 remain stationary as, and now adjust object distance
As shown in table 3, here does not illustrate one by one for the distance between microscope group 2 and zoom microscope group 3.
Table 3
| Object distance (mm) | 340 | 360 | 380 |
| Short focus position A (mm) | 4.5 | 4.4 | 2.4 |
| Middle Jiao position A (mm) | 44.4 | 40.6 | 37.3 |
| Focal length position A (mm) | 57.9 | 54.3 | 51.2 |
By table 3 it was determined that when short focus position, the stroke adjusting object distance microscope group 2 is 4.5-2.4=2.1mm, in middle Jiao position
When putting, the stroke adjusting object distance microscope group 2 is 44.4-37.3=7.1mm, and when focal length position, the stroke of tune object distance microscope group 2 is
57.9-51.8=6.1mm it is seen then that adjust during different focal object distance microscope group 2 axial movement distance different, adjust object distance microscope group 2 axially
Displacement maximum magnitude is 7.1mm, and this stroke is feasible when designing cam curve.
Adjust object distance microscope group 2 and zoom microscope group 3 to have each independent cam mechanism respectively, do not interfere with each other.As shown in Figure 5, exist
During object distance changes to 380mm by 340mm, adjust object distance microscope group 2 all the time towards image planes direction dull mobile that is to say, that
When object distance is 380mm, tune object distance microscope group 2 is closest with zoom microscope group 3, as shown in table 2, when short focus position, this distance
For 2.4mm, two cam mechanisms will not interfere with each other.As shown in Table 3, in middle Jiao and focal length position, object distance microscope group 2 and zoom are adjusted
Group 3 the distance between bigger it is impossible to interfere.
Fig. 8 (a) -8 (c) respectively illustrates the optical focal distance setting system of the embodiment of the present invention when object distance is for 340mm at three
Aberration at zoom position-visual field curve, Fig. 9 (a) -9 (c) respectively illustrates the optical focal distance setting system of the embodiment of the present invention in thing
Implement away from for the aberration at three zoom positions-visual field curve during 360mm, Figure 10 (a) -10 (c) respectively illustrates the present invention
The optical focal distance setting system of the example aberration at three zoom positions-visual field curve when object distance is for 380mm.From in figure aberration curve
Understand, preferably being corrected as matter of the present embodiment optical system.
In the embodiment of the present invention, optical focal distance setting system, when observation fluctuates very big or object plane that third dimension is very strong, passes through
Mobile adjust object distance microscope group to come so that object distance change between 340mm～380mm, do not need the whole zoom system, pancreatic system of movement to be
The clearly fixing image of image planes can be obtained, in the optical focal distance setting system in the present invention, be not limited to the concrete numerical value of above-mentioned object distance
And scope.
It should be noted that the shape and size of each part do not reflect actual size and ratio in accompanying drawing, and only illustrate the present invention real
Apply the content of example.
The direction term mentioned in embodiment, for example " on ", D score, "front", "rear", "left", "right" etc., be only with reference to attached
The direction of figure, is not used for limiting the scope of the invention.And above-described embodiment can based on design and reliability consideration,
Being mixed with each other collocation using or use with other embodiment mix and match, that is, the technical characteristic in different embodiments can free group
Close and form more embodiments.
It should be noted that in accompanying drawing or specification text, the implementation that do not illustrate or describe, it is affiliated technology
In field, form known to a person of ordinary skill in the art, is not described in detail.Additionally, the above-mentioned definition to each element and method is simultaneously
It is not limited only to various concrete structures, shape or the mode mentioned in embodiment, those of ordinary skill in the art can carry out letter to it
Singly change or replace,
For example：Spherical optics element can be replaced using aspherical optical element in each microscope group.
Particular embodiments described above, has carried out detailed further to the purpose of the present invention, technical scheme and beneficial effect
Describing in detail bright it should be understood that the foregoing is only the specific embodiment of the present invention, being not limited to the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement done etc., should be included in the protection of the present invention
Within the scope of.
Claims (11)
1. a kind of adjustable limited remote conjugate distance optical focal distance setting system of object distance is it is characterised in that include sequentially setting successively along optical axis
Tune object distance microscope group (2), zoom microscope group (3), compensation microscope group (4) and the rear fixing microscope group (5) put；
Wherein, object distance microscope group (2) is adjusted can to move along optical axis direction, in order to the image planes in fixed position by the object plane of different object distances
Upper blur-free imaging.
2. limited remote conjugate distance optical focal distance setting system according to claim 1 it is characterised in that zoom microscope group (3) and mend
Repay microscope group (4) in unidirectional zooming procedure along the equal single-way moving of optical axis direction.
3. limited remote conjugate distance optical focal distance setting system according to claim 1 is it is characterised in that also include：
Adjust object distance cam canister (6), its side wall is provided with and adjusts the first of object distance cam canister (6) axial direction one-way spiral extension along described
Cam curve (61)；
Object distance microscope group fixture is adjusted in setting in described tune object distance cam canister (6), for clamping described tune object distance microscope group (2)；
It is provided with the first guide pin, described first guide pin is embedded in described first cam on described tune object distance microscope group fixture
In curve (61), by rotating described tune object distance cam canister (6), described first guide pin is along described first cam curve (61)
Motion, described tune object distance microscope group fixture drives described tune object distance microscope group (2) along optical axis direction single-way moving.
4. limited remote conjugate distance optical focal distance setting system according to claim 1 is it is characterised in that also include：
Zoom compensates cam canister (7), its side wall is provided with and compensates what cam canister (7) axial direction one-way spiral extended along described zoom
Second cam curve (71) and the 3rd cam curve (72), described zoom compensate in cam canister (7) setting zoom microscope group fixture and
Compensate microscope group fixture；
Described zoom microscope group fixture clamps described zoom microscope group (3), arranges the second guide pin, described second guide pin thereon
It is embedded in described second cam curve (71)；
Described compensation microscope group fixture, for clamping described compensation microscope group microscope group (4), arranges the 3rd guide pin thereon, and described the
Three guide pins are embedded in described 3rd cam curve (72)；
Wherein, compensate cam canister (7) by rotating described zoom, described second guide pin and the 3rd guide pin are respectively along institute
State the second cam curve (71) and described second cam curve (72) motion, described zoom microscope group fixture and compensation microscope group fixture divide
Not Dai Dong zoom microscope group (3) and compensate microscope group (4) in unidirectional zooming procedure along optical axis direction single-way linkage.
5. limited remote conjugate distance optical focal distance setting system according to claim 1 it is characterised in that
The focal power adjusting object distance microscope group (2) is on the occasion of it includes tune object distance gluing microscope group (21) of positive light coke and positive light coke
Tune object distance simple lens (22)；And/or
The focal power of zoom microscope group (3) is negative value, and it includes the zoom simple lens (31) of negative power and the zoom of negative power
Glued microscope group (32)；And/or
The focal power compensating microscope group (4) is negative value, and it is compensation gluing microscope group (41) of negative power；And/or
The focal power fixing microscope group (5) afterwards is on the occasion of it includes the rear of positive light coke and fixes the first simple lens (51), positive light coke
Rear fix the first glued microscope group (52), negative power rear fix the second simple lens (53), the rear of positive light coke fixes the 3rd
Simple lens (54) and the rear of positive light coke fix the second glued microscope group (55).
6. limited remote conjugate distance optical focal distance setting system according to claim 5 it is characterised in that
Tune object distance gluing microscope group (21) of described positive light coke includes tune object distance gluing front lens (211) of negative power and positive light
Tune object distance gluing rear lenses (212) of focal power；And/or
Zoom gluing microscope group (32) of described negative power includes zoom gluing front lens (321) and the positive light coke of negative power
Zoom gluing rear lenses (322)；And/or
Compensation gluing microscope group (41) of described negative power includes compensation gluing front lens (411) and the positive light coke of negative power
Compensation gluing rear lenses (412)；And/or
Rear first the rear of glued microscope group (52) inclusion positive light coke of fixing of described positive light coke fixes the first glued front lens
And the rear of negative power fixes the first glued rear lenses (522) (521)；And/or
Rear second gluing microscope group (55) of fixing of described positive light coke fixes the second glued front lens (551) by the rear of negative power
Rear with positive light coke fixes the second glued rear lenses (552).
7. limited remote conjugate distance optical focal distance setting system according to claim 6 is it is characterised in that above-mentioned each balsaming lens group
In, glued front lens is the glass material of little Abbe number, and glued rear lenses are the glass material of big Abbe number, and both Abbe numbers are poor
Value is all higher than 25.
8. limited remote conjugate distance optical focal distance setting system according to claim 1 is it is characterised in that described tune object distance microscope group
(2) focal length f2For 96mm～122mm, the focal length f of zoom microscope group (3)3For -25mm～-32mm, compensate the focal length f of microscope group (4)4
For -25mm～-42mm, fix the focal length f of microscope group (5) afterwards5For 24mm～32mm.
9. limited remote conjugate distance optical focal distance setting system according to claim 5 is it is characterised in that described tune object distance microscope group
(2) focal length f2For 106mm, the focal length f of zoom microscope group (3)3For -29.5mm, compensate the focal length f of microscope group (4)4For -32.5mm,
Fix the focal length f of microscope group (5) afterwards5For 27.9mm.
10. limited remote conjugate distance optical focal distance setting system according to claim 1 is it is characterised in that the scope of described object distance
It is 340mm～380mm.
11. limited remote conjugate distance optical focal distance setting systems according to claim 1 are it is characterised in that also include：
Imageing sensor, is arranged at described image planes position, for receiving imaging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610929892.2A CN106405804A (en) | 2016-10-31 | 2016-10-31 | Object distance adjustable finite distance conjugate distance optical zoom system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610929892.2A CN106405804A (en) | 2016-10-31 | 2016-10-31 | Object distance adjustable finite distance conjugate distance optical zoom system |
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| CN108917915A (en) * | 2018-07-19 | 2018-11-30 | 安徽大学 | A kind of laser of visualization focusing is from mixed signal sound detection method and system |
| CN110441234A (en) * | 2019-08-08 | 2019-11-12 | 上海御微半导体技术有限公司 | A kind of zoom cylinder mirror, defect detecting device and defect inspection method |
| CN113208559A (en) * | 2021-05-18 | 2021-08-06 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field non-mydriatic wide refraction compensation eye fundus imaging optical system |
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