CN208421374U - A kind of electronic continuous zoom lens - Google Patents
A kind of electronic continuous zoom lens Download PDFInfo
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- CN208421374U CN208421374U CN201820738846.9U CN201820738846U CN208421374U CN 208421374 U CN208421374 U CN 208421374U CN 201820738846 U CN201820738846 U CN 201820738846U CN 208421374 U CN208421374 U CN 208421374U
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- microscope group
- mover
- fixed
- body tube
- zoom
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Abstract
The utility model provides a kind of electronic continuous zoom lens comprising body tube, preceding fixed microscope group, zoom microscope group, compensation microscope group, rear fixed microscope group and the cylindrical linear being fixed on the body tube；The cylindrical linear include by stator, the first mover and the second mover that are arranged in parallel and do not contact with each other；Fixed microscope group and rear fixed microscope group zoom microscope group are fixed on the interior intracavitary of the body tube before described；The zoom microscope group is fixed on first mover, and the compensation microscope group is fixed on second mover, and fixed microscope group, zoom microscope group, compensation microscope group, rear fixed microscope group are set in sequence before described.The electronic continuous zoom lens of the utility model are compared with traditional zoom camera lens, eliminate the transmission links such as cam, gear, bearer ring, guide pin, zoom microscope group and compensation microscope group are directly driven using linear motor mode, avoids and repeats zoom precision, service life problem caused by fretting wear.
Description
Technical field
The utility model belongs to the optical lens technology field for radiographic measurement instrument, more particularly to a kind of electronic continuous
Zoom camera lens.
Background technique
In mechanical processing process, the geometric dimension measurement of components is indispensable important link.Image measurer
It is widely applied geometric dimension measuring device, measured piece is placed on the table, using image system to measured size feature
It is focused and takes pictures, the measurement of geometric dimension is completed through image procossing.Optical lens is the core component of image measurer, light
Learning image quality directly decides measurement accuracy.To adapt to different measurement demands, the optical lens of image measurer mostly uses change
Times camera lens, also known as zoom lens.The characteristics of zoom camera lens be focal length can consecutive variations in a certain range, and image planes position is always
It remains stationary, image quality keeps good.The structure of typical zoom camera lens as shown in Figure 1, wherein a is preceding fixed microscope group, effect be to
System provides fixed picture；B is zoom microscope group, is moved between preceding fixed microscope group a and rear fixed microscope group d, effect is to change light
Learn enlargement ratio；C is compensation microscope group, makees nonlinear motion by certain curvilinear path, effect is compensation zoom microscope group in zoom
Generated image planes are mobile in the process；D fixes microscope group after being, the picture for that will compensate microscope group is converted into the last real image of system,
And the synthesis focal length value of system, equipment aperture diaphragm are adjusted, guarantee that the relative aperture of the system in zoom movement is constant, before compensation
(a is the remaining difference of preceding fixed microscope group, zoom microscope group b and compensation microscope group c) to 3 microscope groups, reaches whole system image quality
To optimum state.
Existing zoom camera lens generallys use cam structure, as [Qiao Jian, Cao Lihua, Cui Shuan wait zoom mirror to document
Header structure design and focal length export analysis Application Optics .2010,31 (4) in real time], cam mechanism is to realize to be rotated by motor to transport
The executing agency that turn turns to zoom, compensation microscope group is moved along optical axis direction.Cam mechanism is mainly with the cam with gear, bearing
The composition such as ring, guide rail, guide pin, locking nut.When the rotation of motor driven cam, zoom microscope group is passed motion to by guide pin
With compensation microscope group.Under the guidance of guide rail, zoom is converted by the rotary motion of cam, compensates microscope group along the straight line of optical axis direction
It is mobile.
Due to using cam drive mechanical structure, the main problem of current zoom camera lens is cam path, bearer ring, main branch
The design, processing, matching requirements for supportting the key parts such as lens barrel are high, since mechanical wear causes zoom repeatable accuracy, service life
It is not high.
Utility model content
The purpose of this utility model is to provide a kind of fretting wear for avoiding components, improves zoom repeatable accuracy and make
With the electronic continuous zoom lens in service life.
The utility model provides a kind of electronic continuous zoom lens comprising body tube, preceding fixed microscope group, zoom microscope group,
Compensation microscope group, rear fixed microscope group and the cylindrical linear being fixed on the body tube；The cylindrical linear
Including by stator, the first mover and the second mover that are arranged in parallel and do not contact with each other；The preceding fixed microscope group and rear fixed mirror
Group zoom microscope group is fixed on the interior intracavitary of the body tube；The zoom microscope group is fixed on first mover, the compensation
Microscope group is fixed on second mover, and fixed microscope group, zoom microscope group, compensation microscope group, rear fixed microscope group are set in sequence before described.
It preferably, further include the first connecting plate and the second connecting plate, the zoom microscope group is fixed on by the first connecting plate
On first mover, the compensation microscope group is fixed on the second mover by the second connecting plate.
Preferably, the body tube offers the first gap and the second gap, and the first connecting plate passes through the first gap along main
The axis direction of lens barrel is mobile, and the second connecting plate passes through the second gap and moves along the axis direction of body tube.
It preferably, further include the first mounting base and the second mounting base, the cylindrical linear passes through the first mounting base
It is fixed on body tube with the second mounting base.
Preferably, the outer wall of the body tube is equipped between outer land terrace, and the cylindrical linear is mounted between outer land terrace
On.
Preferably, fixed microscope group, rear fixed microscope group and stator before the body tube is fixed.
Preferably, the inner cavity of the body tube is equipped with foreground terrace and backstage terrace, before fixed microscope group is mounted on before described
On step surface, fixed microscope group is mounted on the terrace of backstage after described.
Preferably, the stator include stator cylinder, in stator cylinder and multiple permanent magnets for being spaced substantially equidistant with
And the magnetic yoke between two adjacent permanent magnets.
Preferably, first mover includes the first mover shell and the first mover winding, and the second mover includes second
Mover shell and the second mover winding.
Preferably, consistent first linear hall element of two parameters and the second linear Hall are installed on first mover
Element also installs the consistent third linear Hall element of two parameters and the 4th linear hall element, First Line on the second mover
Property Hall element and the second linear hall element between be spaced each other half of pole span, third linear Hall element and the 4th it is linear suddenly
It is also spaced half of pole span each other between your element.
The electronic continuous zoom lens of the utility model compared with traditional zoom camera lens, eliminate cam, gear, bearer ring,
The transmission links such as guide pin directly drive zoom microscope group and compensation microscope group using linear motor mode, and avoiding fretting wear causes
Repetition zoom precision, service life problem；The utility model simplifies zoom camera lens internal structure, and it is difficult to reduce camera lens assembly
Degree, improves zoom repeatable accuracy and service life, improves zoom speed.
Detailed description of the invention
Fig. 1 is the schematic diagram of existing zoom camera lens；
Fig. 2 is the structural schematic diagram of the electronic continuous zoom lens of the utility model；
Fig. 3 is the structural schematic diagram of the cylindrical linear of electronic continuous zoom lens shown in Fig. 2.
Figure number explanation:
11- body tube, microscope group, 13- zoom microscope group are fixed before 12-, and 14- compensates microscope group, fixes microscope group, 21- first after 15-
Mounting base, the second mounting base of 25-, 22- stator, the first mover of 23-, the second mover of 24-, the first connecting plate of 3-, the connection of 4- second
Plate, 221- stator cylinder, 222- permanent magnet, 223- magnetic yoke, 233- the first mover shell, 243- the second mover shell, 234-
One mover winding, 244- the second mover winding, the Hall switch of the first mover of 231-, the Hall switch of the second mover of 232-,
The Hall switch of 241- third mover, the Hall switch of 242 the 4th movers.
Specific embodiment
The utility model provides a kind of electronic continuous zoom lens, as shown in Fig. 2, electronic continuous zoom lens include primary mirror
Cylinder 11, preceding fixed microscope group 12, zoom microscope group 13, compensation microscope group 14, rear fixed microscope group 15, cylindrical linear 2, by cylinder type
Linear motor 2 is fixed on the first mounting base 21 and the second mounting base 25, the first connecting plate 3, the second connecting plate 4 on body tube 11
And motor driven systems, wherein preceding fixed microscope group 12, zoom microscope group 13, compensation microscope group 14 and rear fixed microscope group 15 are sequentially set
It sets；Cylindrical linear 2 includes by stator 22, the first mover 23 and the second mover 24.First mover 23 and the second mover 24
It is arranged in parallel and does not contact with each other.First mover 23 and the second mover 24 are arranged in parallel and do not contact with each other, and zoom microscope group 13 is logical
It crosses the first connecting plate 3 to be fixed on the first mover 23, the first mover 23 drives zoom microscope group 13 to move；Microscope group 14 is compensated by the
Two connecting plates 4 are fixed on the second mover 24, and the second mover 24 driving compensation microscope group 14 moves, and by motion controller, (figure is not
Show) so that the first mover 23 and the second mover 24 is respectively driven zoom microscope group 13 and compensation 14 self-movement of microscope group, realize electronic company
The change of continuous zoom lens ratio.
Cylindrical linear 2 is fixed on body tube 11 by the first mounting base 21 and the second mounting base 25, and makes the
The direction of motion of one mover 23 and the second mover 24 is parallel with the axis of body tube 11.
First mover 23 and the second mover 24 are in contactless state, zoom mirror by electromagnetic force between stator 22 respectively
Group 13 and compensation microscope group 14 are directly driven by the first mover 23 and the second mover 24 respectively, each components inside entire zoom camera lens
Between there is no any friction, therefore the long service life of electronic continuous zoom lens, zoom repeatability are high, zoom speed is fast.
Body tube 11 is used as mirror head outer shell, fixed microscope group 12, rear fixed microscope group 15 and stator 22 before fixed.
Stator 22 is fixed on body tube 11, and stator 22 supports and drive the first mover 23 and the second mover 24 to move.
Motor driven systems (not shown) is powered to cylindrical linear 2, controls the first mover 23 and the second mover 24
Movement.
Wherein, the inner cavity of body tube 11 is equipped with foreground terrace 111 and backstage terrace 112, and foreground terrace 111 is for positioning peace
Fixed microscope group 12, backstage terrace 111 fix microscope group 15 after possessing location and installation before dress.
The outer wall of body tube 11 is equipped between outer land terrace 113, and between outer land terrace 113 is used for location and installation cylindrical linear 2.
First mover 23 and the second mover 24 are arranged in parallel and do not contact with each other, and zoom microscope group 13 is fixed on the by the first connecting plate 3
On one mover 23, compensation microscope group 14 is fixed on the second mover 24 by the second connecting plate 4.
Body tube 11 offers the first gap 114 and the second gap 115, and the first connecting plate 3 passes through the first gap 114 along master
The axis direction of lens barrel 11 is mobile, and the second connecting plate 4 passes through the second gap 115 and moves along the axis direction of body tube 11.
As shown in figure 3, stator 22 include stator cylinder 221, in stator cylinder 221 and be spaced substantially equidistant it is multiple forever
Magnet 222 and the magnetic yoke 223 between two adjacent permanent magnets 222.First mover 23 include the first mover shell 233 with
And the first mover winding 234, the second mover 24 include the second mover shell 243 and the second mover winding 244.
The magnetizing direction of the stator 22 of cylindrical linear 2 is axial.The winding of first mover 23 and the second mover 24
234,244 be 2 phase windings, and mover pole span is equal with 222 pole span of stator permanent magnet.
When the alternating current for passing to 90 ° of two-phase phase difference in mover winding 234,244, alternating current will generate in air gap
Axial travelling-magnetic-field, the magnetic field interaction with permanent magnet 222 push the first mover 23 and the second mover 24 to do axial straight line
Movement.Consistent first linear hall element 231 of two parameters and the second linear hall element 232 are installed on first mover 23,
The consistent third linear Hall element 241 of two parameters and the 4th linear hall element 242 be also installed on second mover 24, first
Half of pole span, third linear Hall element 241 are spaced each other between linear hall element 231 and the second linear hall element 232
And the 4th be also spaced half of pole span between linear hall element 242 each other.
Hall element 231,232,241,242 both faces towards the axle center of stator cylinder 221, makes the magnetic field radial component in air gap
As the induced magnetic field of Hall element, perpendicular to the magnetic field induction face of Hall element.When mover moves along a straight line along axis stator,
The output voltage of Hall element is just/cosine signal by change in displacement, it may be assumed that
ua=umsinθ
ub=umcosθ
Wherein, ua、ubRespectively the first Hall element a and the second Hall element b (or third Hall element and the 4th Hall
Element) voltage output, umWhen for maximum flux density, the output voltage of Hall element, θ is the electrical angle of a certain winding.
By the processing to two-way Hall element signal, the absolute position signal of mover is obtained, i.e.,
θ=arctan (ua/ub),ua>=0 and ub≥0；
θ=arctan (ua/ub)+180, ub≥0；
θ=arctan (ua/ub)+360, ua≤ 0 and ub≥0。
The present embodiment is using cylindrical linear, and in other embodiments, cylindrical linear can be used flat
Template or U-shaped linear motor substitution.
The present embodiment examines rotor position using Hall element, in other embodiments, grating scale or magnetic grid also can be used
Ruler examines rotor position.
The electronic continuous zoom lens of the utility model compared with traditional zoom camera lens, eliminate cam, gear, bearer ring,
The transmission links such as guide pin directly drive zoom microscope group and compensation microscope group using linear motor mode, and avoiding fretting wear causes
Repetition zoom precision, service life problem.
The utility model simplifies zoom camera lens internal structure, reduces camera lens assembly difficulty, improves zoom and repeats essence
Degree and service life, improve zoom speed.
Preferred embodiments of the present invention are described in detail above, but the utility model is not limited to above-mentioned implementation
Detail in mode can carry out the technical solution of the utility model in the range of the technology design of the utility model
A variety of equivalents, these equivalents belong to the protection scope of the utility model.
Claims (10)
1. a kind of electronic continuous zoom lens, which is characterized in that it includes body tube, preceding fixed microscope group, zoom microscope group, compensating glass
Group, rear fixed microscope group and the cylindrical linear being fixed on the body tube；The cylindrical linear include by
Stator, the first mover and the second mover for being arranged in parallel and not contacting with each other；Fixed microscope group and rear fixed microscope group zoom before described
Microscope group is fixed on the interior intracavitary of the body tube；The zoom microscope group is fixed on first mover, and the compensation microscope group is solid
It is scheduled on second mover, fixed microscope group, zoom microscope group, compensation microscope group, rear fixed microscope group are set in sequence before described.
2. electronic continuous zoom lens according to claim 1, it is characterised in that: further include that the first connecting plate and second connect
Fishplate bar, the zoom microscope group are fixed on the first mover by the first connecting plate, and the compensation microscope group is solid by the second connecting plate
It is scheduled on the second mover.
3. electronic continuous zoom lens according to claim 2, it is characterised in that: the body tube offers the first gap
With the second gap, the first connecting plate passes through the first gap and moves along the axis direction of body tube, and the second connecting plate passes through second and slits
The axis direction of opening's edge body tube is mobile.
4. electronic continuous zoom lens according to claim 1, it is characterised in that: further include the first mounting base and the second peace
Seat is filled, the cylindrical linear is fixed on body tube by the first mounting base and the second mounting base.
5. electronic continuous zoom lens according to claim 1, it is characterised in that: the outer wall of the body tube is equipped between outer land
Terrace, the cylindrical linear are mounted between outer land terrace.
6. electronic continuous zoom lens according to claim 1, it is characterised in that: fixed mirror before the body tube is fixed
Group, rear fixed microscope group and stator.
7. electronic continuous zoom lens according to claim 1, it is characterised in that: the inner cavity of the body tube is equipped with foreground
Terrace and backstage terrace, fixed microscope group is mounted on the terrace of foreground before described, and fixed microscope group is mounted on the terrace of backstage after described.
8. electronic continuous zoom lens according to claim 1, it is characterised in that: the stator includes stator cylinder, position
In in stator cylinder and the multiple permanent magnets being spaced substantially equidistant and the magnetic yoke between two adjacent permanent magnets.
9. electronic continuous zoom lens according to claim 1, it is characterised in that: first mover includes the first mover
Shell and the first mover winding, the second mover include the second mover shell and the second mover winding.
10. electronic continuous zoom lens according to claim 1, it is characterised in that: install two on first mover
Consistent first linear hall element of parameter and the second linear hall element also install two parameters consistent on the second mover
Three linear hall elements and the 4th linear hall element, between the first linear hall element and the second linear hall element to each other
It is also spaced half of pole span each other between half of pole span, third linear Hall element and the 4th linear hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820738846.9U CN208421374U (en) | 2018-05-17 | 2018-05-17 | A kind of electronic continuous zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820738846.9U CN208421374U (en) | 2018-05-17 | 2018-05-17 | A kind of electronic continuous zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208421374U true CN208421374U (en) | 2019-01-22 |
Family
ID=65115873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820738846.9U Active CN208421374U (en) | 2018-05-17 | 2018-05-17 | A kind of electronic continuous zoom lens |
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| Country | Link |
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| CN (1) | CN208421374U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627945A (en) * | 2018-05-17 | 2018-10-09 | 苏州天准科技股份有限公司 | A kind of electronic continuous zoom lens |
| CN112361983A (en) * | 2020-11-09 | 2021-02-12 | 中科院南京天文仪器有限公司 | Zoom compensator optical system for aspheric surface detection |
-
2018
- 2018-05-17 CN CN201820738846.9U patent/CN208421374U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627945A (en) * | 2018-05-17 | 2018-10-09 | 苏州天准科技股份有限公司 | A kind of electronic continuous zoom lens |
| CN112361983A (en) * | 2020-11-09 | 2021-02-12 | 中科院南京天文仪器有限公司 | Zoom compensator optical system for aspheric surface detection |
| CN112361983B (en) * | 2020-11-09 | 2022-04-08 | 中科院南京天文仪器有限公司 | Zoom compensator optical system for aspheric surface detection |
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