CN106199900A - A kind of combination mirror holder with hot focusing function - Google Patents
A kind of combination mirror holder with hot focusing function Download PDFInfo
- Publication number
- CN106199900A CN106199900A CN201610557177.0A CN201610557177A CN106199900A CN 106199900 A CN106199900 A CN 106199900A CN 201610557177 A CN201610557177 A CN 201610557177A CN 106199900 A CN106199900 A CN 106199900A
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- CN
- China
- Prior art keywords
- mirror holder
- heater
- hot
- focus adjusting
- focusing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
Abstract
The invention discloses a kind of combination mirror holder with hot focusing function, this combination mirror holder uses the mode of two combination of spectacle frames, and uniformly it is mounted with three hot focus adjusting mechanisms, the temperature of material is adjusted by the way of Active thermal control, regulated quantity is calculated by the concept of linear expansion coefficient, this mode both can make eyeglass move along a straight line along optical axis direction, the adjustment of eyeglass certain angle can be realized again, it is without complicated machine components and matching requirements accurately, simple and compact for structure, overall volume optimization.Additionally, also use two kinds of heaters to be adjusted simultaneously, the impact on hot focus adjusting mechanism degree of regulation of the thermal control precision can be eliminated.
Description
Technical field
The present invention relates to space camera focus adjustment technical field, particularly relate to a kind of combined lens with hot focusing function
Frame.
Background technology
In recent years, space technology development is very fast, and the application of space camera is more extensive, the core of space camera
Task is to obtain and provide the image of complete display.But, space camera, can be by delivery condition when launching and in orbit
The impact of (such as shock and vibration, acceleration overload etc.) and environmental condition (such as pressure, temperature, microgravity etc.), changing of these conditions
Change can make camera that out of focus in various degree occurs, thus causes the decline of image quality.In order to ensure the one-tenth picture element of space camera
Amount, makes camera that the change of environmental factors is had good adaptability, it is necessary to add focus adjusting mechanism in camera system, to repair
The most this out of focus, and the focusing amount of focus adjusting mechanism can be determined according to the requirement of environmental condition and control accuracy, it is therefore an objective to
Space camera is made to obtain the image of fine definition.
At present, the focusing mode of space camera has multiple, mainly by optical system, version, focusing accuracy and use
Environmental condition is determined.According to different focusing positions, focusing mode conventional at present can be divided three classes, be camera lens respectively
Focusing, reflecting mirror focusing and focal plane focusing mode.Lens focusing i.e. changes optical interval by the way of mobile optical lens,
Realize focusing；Reflecting mirror focusing i.e. realizes focusing by the mobile reflecting mirror acting light path effect of turning back in optical system, conventional
In the optical system longer in rear cut-off distance, focusing accuracy is higher；I.e. by mobile image forming medium, (focal plane or CCD feel in focal plane focusing
Bright finish) focus, it is commonly applied in the optical system of focal plane subassembly simple in construction, small volume.
It addition, according to focusing principle, it is also possible to focusing mode is divided into mechanical focusing and hot focusing mode, and wherein machinery is adjusted
Burnt mode is typically, by screw-nut or cam mechanism, the gyration of motor is converted to linear motion, by one is the most again
The reducing gear of row realizes accurate focusing, cam mechanism relatively simple for structure, and strong shock resistance is suitable for use as heavy loading mechanism
Direction of motion conversion, but the processing request of cam curve is higher, and the space requirement of cam mechanism and its reducing gear is the most relatively
Greatly；Although screw-nut mechanism simple in construction, motion is flexible, but impact resistance is poor, assembles loaded down with trivial details, assembly precision requirement
High.
At present, the research for camera heat focusing mode is less, and this mode refers to the temperature by adjusting structural elements
Degree, indirectly realizes adjusting the purpose of position of focal plane, but focusing sensitivity and precision depends on temperature control and Adjustment precision, right
The thermal control part of camera is had higher requirement.
Summary of the invention
It is an object of the invention to provide a kind of combination mirror holder with hot focusing function, i.e. by Active thermal control, (temperature is adjusted
Joint) mode make eyeglass move along a straight line vertically, be uniformly distributed at hot focus adjusting mechanism three, it is also possible to realize the certain angle of eyeglass
The adjustment of degree.
It is an object of the invention to be achieved through the following technical solutions:
A kind of combination mirror holder with hot focusing function, including: it is evenly distributed on three on circular configuration combination mirror holder
Hot focus adjusting mechanism (1), heat insulating mattress (2), support mirror holder (3), adjustment mirror holder (4), lens set (5) and some securing members (6)；Its
In:
One end that each hot focus adjusting mechanism (1) is connected with support mirror holder (3) is fixing end, by securing member (6) and support
Mirror holder (3) connects, and centre is provided with heat insulating mattress (2)；The other end of hot focus adjusting mechanism (1) is adjustable side, by securing member (6) and tune
Whole mirror holder (4) connects；Lens set (5) is installed in adjustment mirror holder (4)；Described adjustment mirror holder (4) is joined with supporting mirror holder (3) axis hole
Close, it is ensured that two mirror holder axialities reach predetermined value, and make adjustment mirror holder (4) in axial direction to move；
Make hot focus adjusting mechanism (1) elongate or shorten along optical axis direction by the way of Active thermal control, thus drive adjustment mirror
Frame (4) moves along optical axis direction with lens set (5), the final target realizing focusing.
Described hot focus adjusting mechanism (1) including: heater one, heater two, outer housing and trip bolt；Wherein:
The flange face side of described heater one is fixing with support mirror holder to be connected；
A part for described heater two gos deep into the inside to heater one from the flange face side of heater one, and passes through
Trip bolt is fixing to be connected, and the radial direction of heater one and heater two exists certain interval；
Described outer housing is arranged on the outside of heater one, and its height, less than regulation end face, passes through screw thread with heater one
Fixing connection.
Assuming that initial temperature is T, heater one has high linear expansion coefficient 1, and initial length is L1 vertically；Heater
Two have low linear expansion coefficient 2, and initial length is L2 vertically；
By the way of gluing heating plate at heater one periphery, the temperature of heater one is controlled at T1, T1 > T, Δ
T1=T1-T；In the same way the temperature of heater two is controlled at T2, T2 < T, Δ T2=T-T2；Δ T1 simultaneously > Δ T2；
Computing formula according to linear expansion coefficient=Δ L/ (L* Δ T), calculates heater one and heater two
Under Δ T1, Δ T2 variations in temperature, the stroke along optical axis direction is Δ L1, Δ L2 respectively, then the focussing distance regulating face is:
ΔL1-ΔL2；
Worked by three the hot focus adjusting mechanisms (1) being evenly distributed on circular configuration combination mirror holder, it is possible to realize simultaneously
Lens set (5) moves along a straight line along optical axis direction；If three the heat focusing that will be evenly distributed on circular configuration combination mirror holder
Mechanism (1) arranges different regulated quantitys, it is possible to realize the regulation of lens set (5) certain angle.
As seen from the above technical solution provided by the invention, use and heat tune is uniformly installed at two combination of spectacle frames three
The mode of focusing mechanism, can make eyeglass move along a straight line along optical axis direction, can realize the adjustment of eyeglass certain angle simultaneously；Its
In, hot focus adjusting mechanism can use two kinds of heaters to be adjusted simultaneously, can eliminate thermal control precision to focus adjusting mechanism regulation essence
The impact of degree.This mode is without complicated machine components and matching requirements accurately, and simple and compact for structure, overall volume is excellent
Change.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, required use in embodiment being described below
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for this
From the point of view of the those of ordinary skill in field, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
The structural representation of a kind of combination mirror holder with hot focusing function that Fig. 1 provides for the embodiment of the present invention；
The structural representation of the hot focus adjusting mechanism that Fig. 2 provides for the embodiment of the present invention；
The generalized section of the hot focus adjusting mechanism that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on this
Inventive embodiment, the every other enforcement that those of ordinary skill in the art are obtained under not making creative work premise
Example, broadly falls into protection scope of the present invention.
The structural representation of a kind of combination mirror holder with hot focusing function that Fig. 1 provides for the embodiment of the present invention.Such as Fig. 1
Shown in, it specifically includes that
It is evenly distributed on three hot focus adjusting mechanisms 1, heat insulating mattress 2 on circular configuration combination mirror holder, supports mirror holder 3, adjustment
Mirror holder 4, lens set 5 and some securing members 6；Wherein:
One end that each hot focus adjusting mechanism 1 is connected with support mirror holder 3 is fixing end, by securing member 6 with support mirror holder 3 even
Connecing, centre is provided with heat insulating mattress 2；The other end of hot focus adjusting mechanism 1 is adjustable side, is connected with adjusting mirror holder 4 by securing member 6；Mirror
Sheet group 5 is installed on adjustment mirror holder 4；Described adjustment mirror holder 4 and support mirror holder 3 shaft hole matching, it is ensured that two mirror holder axialities reach
To predetermined value, and adjustment mirror holder 4 is made in axial direction to move；
Make hot focus adjusting mechanism 1 elongate or shorten along optical axis direction by the way of Active thermal control, thus drive adjustment mirror holder 4
Move along optical axis direction with lens set 5, the final target realizing focusing.
As Figure 2-3, described hot focus adjusting mechanism 1 includes: heater one 1-1, heater two 1-2, outer housing 1-3 and tight
Gu screw 1-4；Wherein:
The flange face side of described heater one 1-1 is fixing with support mirror holder 3 to be connected；
A part of described heater two 1-2 is goed deep into heater one 1-1 from the flange face side of heater one 1-1
Portion, and connect by trip bolt 1-4 is fixing, additionally, the radial direction of heater one 1-1 and heater two 1-2 exists certain
Gap, prevents because adding thermal expansion and occurring locked；
Described outer housing 1-3 is arranged on the outside of heater one 1-1, and its height is less than regulation end face, with heater one 1-1
It is threadably secured connection, adds outer housing 1-3 and can reduce the external environment impact on heater two 1-2, increase heating simultaneously
The radiating surface of device one 1-1, accelerates mechanism's heat radiation.
The core of the combination mirror holder that the embodiment of the present invention is provided is to realize heat focusing function, and its focusing principle essence is profit
The phenomenon that due to the change of own temperature with the linear expansion coefficient of metal material, i.e. material can shrink or expand, utilizes material
Expect that this character just can change the temperature of material self by the way of Active thermal control, thus realize a direction top offset
Adjust.It should be noted that the difference due to metal material, linear expansion coefficient is the most different, its numerical value also with actual temperature and ginseng
Examine temperature relevant, but owing to the linear expansion coefficient of solid material trends towards constant more than Debye characteristic temperature, generally can be by
The linear expansion coefficient of solid material as temperature independent constant, this be also this mechanism realize heat focusing function important before
Carry.So according to the computing formula=Δ L/ (L* Δ T) of linear expansion coefficient, wherein, linear expansion coefficient is as material
Build-in attribute, usually a constant, Δ L is that the desired value of design, i.e. material are required along optical axis side under Δ T variations in temperature
To stroke, then by select suitable temperature controlling range Δ T, determine the original length L of material.
Assuming that initial temperature is T, heater one 1-1 has high linear expansion coefficient 1 (such as aluminium alloy), the most initially
A length of L1；Heater two 1-2 has low linear expansion coefficient 2 (such as invar), and initial length is L2 vertically；
By the way of gluing heating plate at heater one 1-1 periphery, the temperature of heater one 1-1 is controlled at T1, T1 >
T, Δ T1=T1-T；In the same way the temperature of heater two 1-2 is controlled at T2, T2 < T, Δ T2=T-T2；Δ T1 simultaneously
>ΔT2；
Computing formula according to linear expansion coefficient=Δ L/ (L* Δ T), can calculate heater one 1-1 and add
Hot device two 1-2 stroke along optical axis direction under Δ T1, Δ T2 variations in temperature is Δ L1, Δ L2 respectively, then regulate the tune in face
Defocus distance is: Δ L1-Δ L2；
As it has been described above, regulated by two kinds of heaters simultaneously, the impact on degree of regulation of the thermal control precision can be eliminated；With
Time, worked by three the hot focus adjusting mechanisms 1 being evenly distributed on circular configuration combination mirror holder, it is possible to realize lens set 5 simultaneously
Move along a straight line along optical axis direction；If additionally, three hot focus adjusting mechanisms 1 are respectively adopted different thermal control measures and control temperature
Degree, then can arrange different regulated quantitys by three hot focus adjusting mechanisms 1, thus realize the regulation of lens set (5) certain angle.
The such scheme that the embodiment of the present invention is provided, uses and uniformly installs hot focus adjusting mechanism at two combination of spectacle frames three
Mode, eyeglass can be made to move along a straight line along optical axis direction, the adjustment of eyeglass certain angle can be realized simultaneously；Wherein, heat
Focus adjusting mechanism can use two kinds of heaters to be adjusted simultaneously, can eliminate the thermal control precision shadow to focus adjusting mechanism degree of regulation
Ring.This mode is without complicated machine components and matching requirements accurately, simple and compact for structure, overall volume optimization.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be as the criterion.
Claims (3)
1. a combination mirror holder with hot focusing function, it is characterised in that including: be evenly distributed on circular configuration combination mirror holder
On three hot focus adjusting mechanisms (1), heat insulating mattress (2), support mirror holder (3), adjust mirror holder (4), lens set (5) and some fastenings
Part (6)；Wherein:
One end that each hot focus adjusting mechanism (1) is connected with support mirror holder (3) is fixing end, by securing member (6) and support mirror holder
(3) connecting, centre is provided with heat insulating mattress (2)；The other end of hot focus adjusting mechanism (1) is adjustable side, by securing member (6) and adjustment mirror
Frame (4) connects；Lens set (5) is installed in adjustment mirror holder (4)；Described adjustment mirror holder (4) and support mirror holder (3) shaft hole matching,
Guarantee that two mirror holder axialities reach predetermined value, and make adjustment mirror holder (4) in axial direction to move；
Make hot focus adjusting mechanism (1) elongate or shorten along optical axis direction by the way of Active thermal control, thus drive adjustment mirror holder (4)
Move along optical axis direction with lens set (5), the final target realizing focusing.
A kind of combination mirror holder with hot focusing function the most according to claim 1, it is characterised in that described hot focusing machine
Structure (1) including: heater one, heater two, outer housing and trip bolt；Wherein:
The flange face side of described heater one is fixing with support mirror holder to be connected；
A part for described heater two gos deep into the inside to heater one from the flange face side of heater one, and by fastening
Screw is fixing to be connected, and the radial direction of heater one and heater two exists certain interval；
Described outer housing is arranged on the outside of heater one, and its height, less than regulation end face, is threadably secured with heater one
Connect.
A kind of combination mirror holder with hot focusing function the most according to claim 1 and 2, it is characterised in that
Assuming that initial temperature is T, heater one has high linear expansion coefficient 1, and initial length is L1 vertically；Heater two has
Having low linear expansion coefficient 2, initial length is L2 vertically；
By the way of gluing heating plate at heater one periphery, the temperature of heater one is controlled at T1, T1 > T, Δ T1=
T1-T；In the same way the temperature of heater two is controlled at T2, T2 < T, Δ T2=T-T2；Δ T1 simultaneously > Δ T2；
Computing formula according to linear expansion coefficient=Δ L/ (L* Δ T), calculates heater one with heater two at Δ
Under T1, Δ T2 variations in temperature, the stroke along optical axis direction is Δ L1, Δ L2 respectively, then the focussing distance regulating face is: Δ L1-
ΔL2；
Worked by three the hot focus adjusting mechanisms (1) being evenly distributed on circular configuration combination mirror holder, it is possible to realize eyeglass simultaneously
Group (5) moves along a straight line along optical axis direction；If three hot focus adjusting mechanisms on circular configuration combination mirror holder will be evenly distributed on
(1) different regulated quantitys is set, it is possible to realize the regulation of lens set (5) certain angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610557177.0A CN106199900B (en) | 2016-07-14 | 2016-07-14 | A kind of combination mirror holder with hot focusing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610557177.0A CN106199900B (en) | 2016-07-14 | 2016-07-14 | A kind of combination mirror holder with hot focusing function |
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| CN106199900A true CN106199900A (en) | 2016-12-07 |
| CN106199900B CN106199900B (en) | 2019-07-09 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969754A (en) * | 2017-05-03 | 2017-07-21 | 中国科学院光电研究院 | A kind of thermal control focusing assistant resetting device and method |
| CN107765387A (en) * | 2017-11-23 | 2018-03-06 | 北京空间机电研究所 | Rotating fine-regulating device based on thermal deformation driving |
| CN109884802A (en) * | 2019-03-19 | 2019-06-14 | 中国科学院上海光学精密机械研究所 | A kind of temperature stability is high, the uniform adjustable Linear Laser device of hot spot |
| CN112925159A (en) * | 2021-02-03 | 2021-06-08 | 深圳市兄弟盟科技有限公司 | Projection device with improved focal length adjusting structure and control method thereof |
| CN113042126A (en) * | 2021-03-08 | 2021-06-29 | 中国科学院电工研究所 | Supporting leg device with oil bath for adjusting micro inclination of platform |
| US20210286150A1 (en) * | 2020-03-12 | 2021-09-16 | National Applied Research Laboratories | Optical system having secondary mirror focusing mechanism |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969754A (en) * | 2017-05-03 | 2017-07-21 | 中国科学院光电研究院 | A kind of thermal control focusing assistant resetting device and method |
| CN107765387A (en) * | 2017-11-23 | 2018-03-06 | 北京空间机电研究所 | Rotating fine-regulating device based on thermal deformation driving |
| CN107765387B (en) * | 2017-11-23 | 2020-08-14 | 北京空间机电研究所 | Rotary fine adjustment device based on thermal deformation driving |
| CN109884802A (en) * | 2019-03-19 | 2019-06-14 | 中国科学院上海光学精密机械研究所 | A kind of temperature stability is high, the uniform adjustable Linear Laser device of hot spot |
| US20210286150A1 (en) * | 2020-03-12 | 2021-09-16 | National Applied Research Laboratories | Optical system having secondary mirror focusing mechanism |
| CN112925159A (en) * | 2021-02-03 | 2021-06-08 | 深圳市兄弟盟科技有限公司 | Projection device with improved focal length adjusting structure and control method thereof |
| CN112925159B (en) * | 2021-02-03 | 2022-03-15 | 湛江市视杰技术发展有限公司 | Projection device with improved focal length adjusting structure and control method thereof |
| CN113042126A (en) * | 2021-03-08 | 2021-06-29 | 中国科学院电工研究所 | Supporting leg device with oil bath for adjusting micro inclination of platform |
| CN113042126B (en) * | 2021-03-08 | 2022-06-28 | 中国科学院电工研究所 | Supporting leg device with oil bath for adjusting micro inclination of platform |
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