CN106199900B - 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
- CN106199900B CN106199900B CN201610557177.0A CN201610557177A CN106199900B CN 106199900 B CN106199900 B CN 106199900B CN 201610557177 A CN201610557177 A CN 201610557177A CN 106199900 B CN106199900 B CN 106199900B
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- heater
- mirror holder
- hot
- focus adjusting
- adjustment
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Eyeglasses (AREA)
Abstract
The invention discloses a kind of combination mirror holders with hot focusing function, the combination mirror holder is by the way of two combination of spectacle frame, and uniformly it is mounted with three hot focus adjusting mechanisms, the temperature of material is adjusted by way of Active thermal control, regulated quantity is calculated by the concept of linear expansion coefficient, this mode can both make eyeglass move along a straight line along optical axis direction, the adjustment of eyeglass certain angle may be implemented again, it is without complicated machine components and accurately matching requirements, it is simple and compact for structure, overall volume optimization.In addition, being also adjusted simultaneously using two kinds of heaters, influence of the thermal control precision to hot focus adjusting mechanism degree of regulation can be eliminated.
Description
Technical field
The present invention relates to space camera focus adjustment technical field more particularly to a kind of combined lens with hot focusing function
Frame.
Background technique
In recent years, space technology development is very fast, also more and more extensive, the core of space camera of application of space camera
Task is to obtain and provide the image of complete display.However, will receive delivery condition when space camera is in transmitting and in orbit
The influence of (such as shock and vibration, acceleration overload) and environmental condition (such as pressure, temperature, microgravity), these conditions change
Change can make camera that different degrees of defocus occur, so as to cause the decline of image quality.In order to guarantee space camera at image quality
Amount makes camera have good adaptability to the variation of environmental factor, it is necessary to focus adjusting mechanism be added, in camera system to repair
Just this defocus, and the focusing amount of focus adjusting mechanism can be determined according to the requirement of environmental condition and control precision, it is therefore an objective to
Space camera is set to obtain image high-definition.
Currently, there are many focusing modes of space camera, mainly by optical system, structure type, focusing accuracy and use
Environmental condition is determined.According to different focusing positions, currently used focusing mode can be divided into three classes, be camera lens respectively
Focusing, reflecting mirror focusing and focal plane focusing mode.Lens focusing changes optical interval by way of mobile optical lens,
Realize focusing；Reflecting mirror focusing realizes focusing by the mobile reflecting mirror for acting optical path of turning back in optical system, commonly uses
In, the higher optical system of focusing accuracy longer in rear cut-off distance；Focal plane focusing passes through mobile image forming medium (focal plane or CCD sense
Smooth surface) focus, be commonly applied to focal plane subassembly structure is simple, in optical system of small volume.
In addition, focusing mode can also be divided into mechanical focusing and hot focusing mode according to focusing principle, wherein mechanical adjust
Burnt mode is usually that the rotary motion of motor is converted to linear motion by screw-nut or cam mechanism, then passes through a system again
The deceleration mechanisms of column realizes accurate focusing, cam mechanism it is relatively simple for structure, 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 deceleration mechanism also compared with
Greatly；Although screw-nut mechanism structure is simple, flexibly, impact resistance is poor for movement, assembles cumbersome, assembly precision requirement
It is high.
Currently, the research for camera heat focusing mode is less, the temperature that this mode refers to by adjusting structural elements
Degree, the next purpose for realizing adjustment position of focal plane indirectly, but focusing sensitivity and precision depend on temperature control and Adjustment precision, right
More stringent requirements are proposed for the thermal control part of camera.
Summary of the invention
The object of the present invention is to provide a kind of combination mirror holders with hot focusing function, that is, pass through Active thermal control (temperature tune
Section) mode so that eyeglass is moved along a straight line along axial direction, be uniformly distributed at hot focus adjusting mechanism three, can also realize the certain angle of eyeglass
The adjustment of degree.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of combination mirror holder with hot focusing function, comprising: three be evenly distributed 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 several fasteners (6)；Its
In:
One end that each hot focus adjusting mechanism (1) connect with support mirror holder (3) is fixing end, passes through fastener (6) and support
Mirror holder (3) connection, centre are equipped with heat insulating mattress (2)；The other end of hot focus adjusting mechanism (1) is adjustable side, by fastener (6) and is adjusted
Whole mirror holder (4) connection；Lens set (5) is installed in adjustment mirror holder (4)；The adjustment mirror holder (4) is matched with support mirror holder (3) axis hole
It closes, it is ensured that two mirror holder concentricities reach predetermined value, and move adjustment mirror holder (4) can in axial direction；
Elongate or shorten hot focus adjusting mechanism (1) along optical axis direction, to drive adjustment mirror
Frame (4) is moved with lens set (5) along optical axis direction, the final target for realizing focusing.
The hot focus adjusting mechanism (1) includes: heater one, heater two, outer cover and fastening screw；Wherein:
The flange face side of the heater one is fixedly connected with support mirror holder；
A part of the heater two is goed deep into from the flange face side of heater one to the inside of heater one, and passes through
Fastening screw is fixedly connected, and there are certain intervals for the radial direction of heater one and heater two；
The outside of heater one is arranged in the outer cover, its height passes through screw thread with heater one lower than end face is adjusted
It is fixedly connected.
Assuming that initial temperature is T, heater one has high linear expansion coefficient ɑ 1, is L1 along axial initial length；Heater
Two have low linear expansion coefficient ɑ 2, are L2 along axial initial length；
By the way that the temperature of heater one is controlled in T1, T1 > T, Δ in such a way that one periphery of heater glues heating sheet
T1=T1-T；The temperature of heater two is controlled in T2, T2 < T, Δ T2=T-T2 in the same way；Δ T1 > Δ T2 simultaneously；
According to the calculation formula of linear expansion coefficient ɑ=Δ L/ (L* Δ T), to calculate heater one and heater two
Stroke under Δ T1, Δ T2 temperature change along optical axis direction is Δ L1, Δ L2 respectively, then adjusts the focussing distance in face are as follows:
ΔL1-ΔL2；
It is worked at the same time, be can be realized by three hot focus adjusting mechanisms (1) being evenly distributed on circular configuration combination mirror holder
Lens set (5) moves along a straight line along optical axis direction；If the three heat focusing that will be evenly distributed on circular configuration combination mirror holder
Different regulated quantitys is arranged in mechanism (1), can be realized the adjusting of lens set (5) certain angle.
As seen from the above technical solution provided by the invention, using uniformly installation heat is adjusted at two combination of spectacle frame and three
The mode of focusing mechanism can make eyeglass move along a straight line along optical axis direction, while can realize the adjustment of eyeglass certain angle；Its
In, hot focus adjusting mechanism can be adjusted simultaneously using two kinds of heaters, can be eliminated thermal control precision and be adjusted essence to focus adjusting mechanism
The influence of degree.This mode is without complicated machine components and accurately matching requirements, and simple and compact for structure, overall volume is excellent
Change.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of combination mirror holder with hot focusing function provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of hot focus adjusting mechanism provided in an embodiment of the present invention；
Fig. 3 is the diagrammatic cross-section of hot focus adjusting mechanism provided in an embodiment of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
Fig. 1 is a kind of structural schematic diagram of combination mirror holder with hot focusing function provided in an embodiment of the present invention.Such as Fig. 1
It is shown, it specifically includes that
Three hot focus adjusting mechanisms 1, heat insulating mattress 2, the support mirror holder 3, adjustment being evenly distributed on circular configuration combination mirror holder
Mirror holder 4, lens set 5 and several fasteners 6；Wherein:
One end that each hot focus adjusting mechanism 1 is connect with support mirror holder 3 is fixing end, is connected by fastener 6 and support mirror holder 3
It connects, centre is equipped with heat insulating mattress 2；The other end of hot focus adjusting mechanism 1 is adjustable side, is connect by fastener 6 with adjustment mirror holder 4；Mirror
Piece group 5 is installed on adjustment mirror holder 4；The adjustment mirror holder 4 and support 3 shaft hole matching of mirror holder, it is ensured that two mirror holder concentricities reach
To predetermined value, and move adjustment mirror holder 4 in axial direction；
Elongate or shorten hot focus adjusting mechanism 1 along optical axis direction, to drive adjustment mirror holder 4
It is moved with lens set 5 along optical axis direction, the final target for realizing focusing.
As Figure 2-3, the hot focus adjusting mechanism 1 includes: one 1-1 of heater, two 1-2 of heater, outer cover 1-3 and tight
Gu screw 1-4；Wherein:
The flange face side of one 1-1 of heater is fixedly connected with support mirror holder 3；
A part of two 1-2 of heater is goed deep into from the flange face side of one 1-1 of heater to one 1-1 of heater
Portion, and be fixedly connected by fastening screw 1-4, in addition, the radial direction of one 1-1 of heater and two 1-2 of heater exists centainly
Gap prevents because heating expansion occurs to lock；
The outside of one 1-1 of heater is arranged in the outer cover 1-3, its height is lower than end face is adjusted, with one 1-1 of heater
It is threadably secured connection, addition outer cover 1-3 can reduce influence of the external environment to two 1-2 of heater, while increase heating
The radiating surface of one 1-1 of device accelerates mechanism heat dissipation.
The core of combination mirror holder provided by the embodiment of the present invention is to realize hot focusing function, and focusing principle essence is benefit
With the linear expansion coefficient of metal material, i.e., the phenomenon that material can be shunk or be expanded due to the change of own temperature, utilize material
Expect that this property can change the temperature of material itself by way of Active thermal control, to realize what one party shifted up
Adjustment.It should be noted that due to metal material difference, linear expansion coefficient is also different, numerical value also with actual temperature and ginseng
Examine that temperature is related, but since the linear expansion coefficient of solid material is intended to constant more than Debye characteristic temperature, it usually can will
The linear expansion coefficient of solid material as temperature independent constant, this be also the mechanism realize hot focusing function it is important before
It mentions.So according to the calculation formula of linear expansion coefficient ɑ=Δ L/ (L* Δ T), wherein linear expansion coefficient ɑ is as material
Build-in attribute, usually a constant, Δ L are the target value of design, i.e., material is required along optical axis side under Δ T temperature change
To stroke, then by selecting suitable temperature controlling range Δ T, to determine the original length L of material.
Assuming that initial temperature is T, one 1-1 of heater has high linear expansion coefficient ɑ 1 (such as aluminium alloy), along axial initial
Length is L1；Two 1-2 of heater has low linear expansion coefficient ɑ 2 (such as invar), is L2 along axial initial length；
In such a way that one 1-1 periphery of heater glues heating sheet by the control of the temperature of one 1-1 of heater in T1, T1 >
T, Δ T1=T1-T；The temperature of two 1-2 of heater is controlled in T2, T2 < T, Δ T2=T-T2 in the same way；Δ T1 simultaneously
>ΔT2；
According to the calculation formula of linear expansion coefficient ɑ=Δ L/ (L* Δ T), one 1-1 of heater can be calculated and added
Hot two 1-2 of device is Δ L1, Δ L2 respectively along the stroke of optical axis direction under Δ T1, Δ T2 temperature change, then adjusts the tune in face
Defocus distance are as follows: Δ L1- Δ L2；
As described above, adjusting simultaneously by two kinds of heaters, influence of the thermal control precision to degree of regulation can be eliminated；Together
When, it is worked at the same time by three hot focus adjusting mechanisms 1 being evenly distributed on circular configuration combination mirror holder, can be realized lens set 5
It moves along a straight line along optical axis direction；In addition, if different thermal control measure and control temperature is respectively adopted in three hot focus adjusting mechanisms 1
Degree, then can be arranged different regulated quantitys for three hot focus adjusting mechanisms 1, to realize the adjusting of lens set (5) certain angle.
Above scheme provided by the embodiment of the present invention, using two combination of spectacle frame and three at hot focus adjusting mechanism is uniformly installed
Mode, eyeglass can be made to move along a straight line along optical axis direction, while can realize the adjustment of eyeglass certain angle；Wherein, hot
Focus adjusting mechanism can be adjusted simultaneously using two kinds of heaters, can eliminate thermal control precision to the shadow of focus adjusting mechanism degree of regulation
It rings.This mode is without complicated machine components and accurately matching requirements, simple and compact for structure, overall volume optimization.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (2)
1. a kind of combination mirror holder with hot focusing function characterized by comprising be evenly distributed on circular configuration combination mirror holder
On three hot focus adjusting mechanisms (1), heat insulating mattress (2), support mirror holder (3), adjustment mirror holder (4), lens set (5) and several fastenings
Part (6)；Wherein:
One end that each hot focus adjusting mechanism (1) connect with support mirror holder (3) is fixing end, passes through fastener (6) and support mirror holder
(3) it connects, centre is equipped with heat insulating mattress (2)；The other end of hot focus adjusting mechanism (1) is adjustable side, passes through fastener (6) and adjustment mirror
Frame (4) connection；Lens set (5) is installed in adjustment mirror holder (4)；The adjustment mirror holder (4) and support mirror holder (3) shaft hole matching,
Ensure that two mirror holder concentricities reach predetermined value, and move adjustment mirror holder (4) can in axial direction；
Elongate or shorten hot focus adjusting mechanism (1) along optical axis direction, to drive adjustment mirror holder (4)
It is moved with lens set (5) along optical axis direction, the final target for realizing focusing；
The hot focus adjusting mechanism (1) includes: heater one, heater two, outer cover and fastening screw；Wherein:
The flange face side of the heater one is fixedly connected with support mirror holder；
A part of the heater two is goed deep into from the flange face side of heater one to the inside of heater one, and passes through fastening
Screw is fixedly connected, and there are certain intervals for the radial direction of heater one and heater two；
The outside of heater one is arranged in the outer cover, its height is threadably secured lower than end face is adjusted with heater one
Connection.
2. a kind of combination mirror holder with hot focusing function according to claim 1, which is characterized in that
Assuming that initial temperature is T, heater one has high linear expansion coefficient ɑ 1, is L1 along axial initial length；Heater two has
There is low linear expansion coefficient ɑ 2, is L2 along axial initial length；
By the way that the temperature of heater one is controlled in T1, T1 > T, Δ T1=in such a way that one periphery of heater glues heating sheet
T1-T；The temperature of heater two is controlled in T2, T2 < T, Δ T2=T-T2 in the same way；Δ T1 > Δ T2 simultaneously；
According to the calculation formula of linear expansion coefficient ɑ=Δ L/ (L* Δ T), to calculate heater one and heater two in Δ
Stroke under T1, Δ T2 temperature change along optical axis direction is Δ L1, Δ L2 respectively, then adjusts the focussing distance in face are as follows: Δ L1-
ΔL2；
It is worked at the same time by three hot focus adjusting mechanisms (1) being evenly distributed on circular configuration combination mirror holder, can be realized eyeglass
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, can be realized the adjusting 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 |
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| 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 CN106199900A (en) | 2016-12-07 |
| CN106199900B true CN106199900B (en) | 2019-07-09 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969754B (en) * | 2017-05-03 | 2020-08-11 | 中国科学院光电研究院 | Thermal control focusing auxiliary assembly and adjustment device and method |
| 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 |
| CN109884802B (en) * | 2019-03-19 | 2021-01-01 | 中国科学院上海光学精密机械研究所 | Linear laser with high temperature stability and uniform and adjustable light spots |
| TWI730666B (en) * | 2020-03-12 | 2021-06-11 | 財團法人國家實驗研究院 | The optical system having a secondary mirror focusing mechanism |
| 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 |
| 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 |
| CN115826322A (en) * | 2022-12-07 | 2023-03-21 | 中国科学院西安光学精密机械研究所 | Structure and method for temperature focusing of long-focus camera |
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| CN103064165A (en) * | 2012-12-25 | 2013-04-24 | 彭中 | Adjusting device for verticality and separation distance between shot and imaging chip |
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