CN106291907A - A kind of Three Degree Of Freedom secondary mirror adjusting apparatus - Google Patents
A kind of Three Degree Of Freedom secondary mirror adjusting apparatus Download PDFInfo
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- CN106291907A CN106291907A CN201610871476.1A CN201610871476A CN106291907A CN 106291907 A CN106291907 A CN 106291907A CN 201610871476 A CN201610871476 A CN 201610871476A CN 106291907 A CN106291907 A CN 106291907A
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- secondary mirror
- lens barrel
- optical axis
- drive mechanism
- mirror holder
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
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- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of Three Degree Of Freedom secondary mirror adjusting apparatus, including being provided with the secondary mirror holder of secondary mirror eyeglass and being set in the lens barrel outside time mirror holder, during initial position, ensure that the centerline system optical axis of lens barrel overlaps with the centrage of secondary mirror eyeglass.It is also provided with at least two group drive mechanisms, so that secondary mirror holder moves along systematic optical axis direction in lens barrel and rotates around the axle being perpendicular to systematic optical axis.Control system controls the synchronization start and stop of all drive mechanisms, and secondary mirror holder moves and makes the centrage of secondary mirror eyeglass overlap with systematic optical axis all the time with control drive mechanism in rotation process.To sum up, the Three Degree Of Freedom adjusting apparatus in the application can improve the positioning precision during secondary mirror adjusts, and can guarantee that the accurate the most coaxial of axis and systematic optical axis when secondary mirror adjusts.
Description
Technical field
The present invention relates to the secondary mirror adjusting apparatus of a kind of heavy caliber Cassegrain optical system in photoelectric tracking technical field.
Background technology
At present, heavy-caliber optical system mainly uses Cassegrain telescope form, secondary mirror adjustment technology to be to affect photoelectricity
Follow the tracks of the key technology of systematic function.
The purpose that secondary mirror adjusts is to improve the image quality of optical system, in order in the case of energy accurate tracking different distance
The target of movement.At present, in Cassegrain optical system the adjustment of secondary mirror be mainly single-degree-of-freedom adjust mode, i.e. secondary mirror can only
Move along optical axis direction, and can not realize swinging.Single-degree-of-freedom adjusts mode simple in construction, easily realizes, but to optical system
Installation accuracy and eyeglass surface precision require higher.And, for heavy-caliber optical system, single-degree-of-freedom adjustment side
In formula, vibration and the heat effect of drive mechanism are relatively big on the impact of secondary mirror Adjustment precision, are in course of adjustment and easily cause secondary mirror axle
The skew of line is so that it is difficult to ensure that the exact position of secondary mirror and the axiality with systematic optical axis.Therefore, single-degree-of-freedom adjustment side
Formula is only applicable to small-bore optical system.
Therefore, how to provide a kind of multiple degrees of freedom secondary mirror adjusting apparatus, to improve the positioning precision during secondary mirror adjusts,
And can guarantee that the most coaxial of axis and systematic optical axis when secondary mirror adjusts, it is those skilled in the art's technology that solution is presently required
Problem.
Summary of the invention
In view of this, the invention provides a kind of Three Degree Of Freedom secondary mirror adjusting apparatus, during improving secondary mirror adjustment
Positioning precision and ensure the accurate the most coaxial of axis and systematic optical axis when secondary mirror adjusts.
For achieving the above object, the present invention provides following technical scheme:
A kind of Three Degree Of Freedom secondary mirror adjusting apparatus, comprising:
The secondary mirror holder of secondary mirror is installed；
It is set in the centrage weight of the lens barrel outside described mirror holder, the systematic optical axis of described lens barrel and described secondary mirror eyeglass
Close；
At least two group drive mechanisms arranged along the internal diameter of described lens barrel, all described drive mechanisms are along described lens barrel
The circumference in footpath is uniformly distributed, and described drive mechanism is for driving described mirror holder along the system light of described lens barrel in described lens barrel
The direction of axle is moved and is rotated around the direction being perpendicular to systematic optical axis；
The control system being connected with all of equal signal of described drive mechanism, described control system controls all of driver
The synchronization start and stop of structure, described mirror holder moves and controls described drive mechanism and make the centrage of described secondary mirror eyeglass in rotation process
All the time the systematic optical axis with described lens barrel overlaps.
Preferably, in above-mentioned Three Degree Of Freedom secondary mirror adjusting apparatus, described secondary mirror eyeglass is arranged on described by connector
On secondary mirror holder, and the centrage of described secondary mirror eyeglass overlaps with the centrage of described mirror holder.
Preferably, in above-mentioned Three Degree Of Freedom secondary mirror adjusting apparatus, all of described drive mechanism all includes:
The final drive shaft being rotatably connected with the internal diameter of described lens barrel and counter drive shaft, the axis of described power transmission shaft is with described
The centerline system optical axis of lens barrel is parallel；
For the drive mechanism driving described mirror holder to move and rotate；
For supporting the supporting mechanism of described mirror holder.
Preferably, in above-mentioned Three Degree Of Freedom secondary mirror adjusting apparatus, described control system includes:
It is arranged on described mirror holder and for feeding back described mirror holder displacement and the displacement transducer of rotational angle；
For receiving the controller of the signal that all of institute displacement sensors sends, when described controller obtains any one
Individual institute displacement sensors starts to control other all of described drive mechanisms during the signal moving and rotating and is synchronized with the movement.
Preferably, in above-mentioned Three Degree Of Freedom secondary mirror adjusting apparatus, institute's displacement sensors is set on described mirror holder.
Preferably, in above-mentioned Three Degree Of Freedom secondary mirror adjusting apparatus, described control system also includes for controlling all of
The drive mechanism of described drive mechanism synchronizes the driver of start and stop, and described driver receives the signal that described controller sends, with
Realize the distance that all of institute displacement sensors moves identical with the angle of rotation.
Preferably, in above-mentioned Three Degree Of Freedom secondary mirror adjusting apparatus, described drive mechanism is two groups, and along described lens barrel
Systematic optical axis be arranged symmetrically with.
Understand via above-mentioned technical scheme, the invention discloses a kind of Three Degree Of Freedom secondary mirror adjusting apparatus, including installing
There is the secondary mirror holder of secondary mirror eyeglass and be set in the lens barrel outside time mirror holder, during initial position, ensureing that the systematic optical axis of lens barrel is with secondary
The centrage of mirror eyeglass overlaps.Additionally, be also provided with at least two group drive mechanisms, so that secondary mirror holder along lens barrel is in lens barrel
The direction of system optical axis is moved and is rotated around the axle being perpendicular to systematic optical axis.In order to ensure drive mechanism movement during driving
Distance is identical with the angle of rotation, is also provided with control system.Control system controls the synchronization start and stop of all of drive mechanism, secondary
Mirror holder moves and makes the centrage of secondary mirror eyeglass overlap with the systematic optical axis of lens barrel all the time with control drive mechanism in rotation process.This
By drive mechanism is set at least two groups in application, and all of drive mechanism is along uniform point of the circumference of the internal diameter of lens barrel
Cloth, so that when control system controls drive mechanism startup, the drive that all of drive mechanism circumferentially synchronizes time mirror holder moves
Move and rotate, it is ensured that the centrage of secondary mirror eyeglass overlaps with the systematic optical axis of lens barrel.To sum up, the Three Degree Of Freedom in the application adjusts
Device can improve the positioning precision during secondary mirror adjusts, and can guarantee that axis and systematic optical axis when secondary mirror adjusts the most together
Axle.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
The lens barrel of the Three Degree Of Freedom secondary mirror adjusting apparatus that Fig. 1 provides for the embodiment of the present invention and the structural representation of secondary mirror；
Fig. 2 is the structural representation of the Three Degree Of Freedom secondary mirror adjusting apparatus that the embodiment of the present invention is passed through.
Detailed description of the invention
The core of the present invention is to provide a kind of Three Degree Of Freedom secondary mirror adjusting apparatus, to improve the location during secondary mirror adjusts
Precision, it is ensured that when secondary mirror adjusts, axis and systematic optical axis is accurate the most coaxial.
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
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As depicted in figs. 1 and 2, the invention discloses a kind of Three Degree Of Freedom secondary mirror adjusting apparatus, including being provided with secondary mirror mirror
The secondary mirror holder 2 of sheet 1 and be set in the lens barrel 3 outside time mirror holder 2, ensures systematic optical axis (the application of lens barrel 3 during initial position
In the centrage that systematic optical axis is lens barrel 3 of lens barrel 3) overlap with the centrage of secondary mirror eyeglass 1.Additionally, be also provided with at least
Two groups of drive mechanisms, so that secondary mirror holder 2 direction (z direction) of centerline system optical axis along lens barrel 3 in lens barrel 3 is mobile,
And/or rotate around being perpendicular to systematic optical axis.In order to ensure displacement and the angle of rotation of drive mechanism movement during driving
Identical, it is also provided with control system.Control system controls the synchronization start and stop of all of drive mechanism, and secondary mirror holder 2 moves and rotates
During control drive mechanism make the centrage of secondary mirror eyeglass 1 all the time with the centerline system optical axis coincidence of lens barrel 3.The application
In by drive mechanism being set at least two groups, and all of drive mechanism is uniformly distributed along the circumference of the internal diameter of lens barrel 3,
So that when control system controls drive mechanism startup, the drive that all of drive mechanism circumferentially synchronizes time mirror holder 2 moves
And rotation, it is ensured that the centrage of secondary mirror eyeglass 1 and the centerline system optical axis coincidence of lens barrel 3.To sum up, three in the application are certainly
The positioning precision during secondary mirror adjusts can be improved, it is ensured that when secondary mirror adjusts, axis and systematic optical axis is accurate by degree adjusting apparatus
Coaxially.
Concrete, secondary mirror eyeglass 1 is arranged on time mirror holder 2 by connector 5, and the centrage of secondary mirror eyeglass 1 is with secondary
The centrage of mirror holder 2 overlaps.In practice, the centrage of secondary mirror eyeglass 1 overlaps with the centrage of time mirror holder 2, and needs to protect
The centrage of card secondary mirror eyeglass 1 overlaps with systematic optical axis.Therefore, as long as operating process ensures time mirror holder 2 and both lens barrels 3
Centrage overlaps.In view of foregoing description, the core in the application is to be in course of adjustment and ensures the movement of time mirror holder 2 not
Can offset.
In further embodiment, all of drive mechanism all include drive mechanism 6, final drive shaft 7, counter drive shaft 8 with
And supporting mechanism 4.Wherein, on final drive shaft 7 and the rotating internal diameter being arranged on lens barrel 3 of counter drive shaft 8.Specifically, main biography
Moving axis 7 and counter drive shaft 8 can be installed by resilient mount, and this resilient mount is fixed on the inwall of lens barrel 3, and leads
Power transmission shaft 7 and counter drive shaft 8 pass through in the rotating installing hole being arranged on resilient mount of bearing with certain eccentric throw.For
Realize mechanization and drive drive axis, be provided with the drive mechanism 6 being connected with power transmission shaft, by the driving of drive mechanism 6,
Making power transmission shaft motion thus drive time mirror holder 2 to move and rotate, above-mentioned supporting mechanism 4 supports the movement of time mirror holder 2 and turns
Dynamic stability.
Control system disclosed herein also includes displacement transducer 9 and controller 10.Wherein, displacement transducer 9 is solid
Dingan County is contained on time mirror holder 2, and displacement transducer 9 is used for feeding back distance and the angle of rotation that time mirror holder 2 moves, and by feedback
Result is sent to controller 10.This controller 10 is able to receive that the signal that all of displacement transducer 9 sends, and is obtaining arbitrarily
One displacement transducer 9 starts to control other all of drive mechanisms 6 during the signal moving or rotating and is synchronized with the movement, owing to controlling
Device 10 is able to receive that the signal that all of displacement transducer 9 sends, and therefore, can realize all of drive mechanism 6 and be synchronized with the movement, and
Ensure that the angle of distance that all of displacement transducer 9 moves or rotation is identical.The application is the centrage with secondary mirror holder 2 and mirror
When the centerline system optical axis of cylinder 3 is initial, coincidence is set for background.
Additionally, control system disclosed herein also includes opening for the drive mechanism 6 controlling all of drive mechanism
The driver 11 stopped, this driver 11 receives the signal that controller 10 sends, with realize that all of displacement transducer 9 moves away from
From identical with the angle rotated.Owing to driver 11 drives all of drive mechanism 6 to synchronize start and stop so that power transmission shaft move away from
From the most identical with the angle rotated, it is ensured that secondary mirror holder 2 is stable mobile.
Drive mechanism can be set to two groups by specific embodiment, and these two groups of drive mechanisms are along the center of lens barrel 3
Wire system optical axis is arranged symmetrically with.
After optical system alignment completes, the initial value of record both sides displacement transducer 9 respectively.Adjust in work, the most real
Time gather the location feedback value of both sides displacement transducer 9, according to high-precise synchronization closed loop control algorithm, drive symmetrical both sides to drive
Mechanism 6 works, and drives time mirror holder 2 to move along a straight line in the z-direction by the way of both sides final drive shaft 7 is with synchronous translational traveling,
Drive time mirror holder 2 to rotate around y-axis by both sides counter drive shaft 8, and rotated around x-axis by dynamic mirror holder 2 of unilateral motor driven belts,
Thus the Three Degree Of Freedom high accuracy realizing secondary mirror adjusts.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (6)
1. a Three Degree Of Freedom secondary mirror adjusting apparatus, it is characterised in that including:
The secondary mirror holder (2) of secondary mirror eyeglass (1) is installed；
It is set in the lens barrel (3) in described mirror holder (2) outside, the systematic optical axis of described lens barrel (3) and described secondary mirror eyeglass (1)
Centrage overlaps；
At least two group drive mechanisms arranged along the internal diameter of described lens barrel (3), all described drive mechanisms are along described lens barrel (3)
The circumference of internal diameter is uniformly distributed, and described drive mechanism is used for driving described mirror holder (2) along described lens barrel in described lens barrel (3)
(3) direction of systematic optical axis is moved or/and rotate around the direction being perpendicular to systematic optical axis；
The control system being connected with all of equal signal of described drive mechanism, described control system controls all of drive mechanism
Synchronizing start and stop, described mirror holder (2) is moved and is controlled described drive mechanism in rotation process and make the center of described secondary mirror eyeglass (1)
Line systematic optical axis with described lens barrel (3) all the time overlaps.
Three Degree Of Freedom secondary mirror adjusting apparatus the most according to claim 1, it is characterised in that described secondary mirror eyeglass (1) is passed through
Connector (5) is arranged on described mirror holder (2), and in the centrage of described secondary mirror eyeglass (1) and described mirror holder (2)
Heart line overlaps.
Three Degree Of Freedom secondary mirror adjusting apparatus the most according to claim 1, it is characterised in that all of described drive mechanism is equal
Including:
The final drive shaft (7) being rotatably connected with the internal diameter of described lens barrel (3) and counter drive shaft (8), the axis of described power transmission shaft
Parallel with the systematic optical axis of described lens barrel (3)；
The drive mechanism (6) being connected with described power transmission shaft；
For supporting the supporting mechanism (4) of described mirror holder (2).
Three Degree Of Freedom secondary mirror adjusting apparatus the most according to claim 3, it is characterised in that described control system includes:
It is arranged on described mirror holder (2) above and to be used for feeding back described mirror holder (2) displacement and the displacement sensing of rotational angle
Device (9)；
For receiving the controller (10) of the signal that all of institute's displacement sensors (9) sends, when described controller (10) obtains
Take any one of displacement transducer (9) to start to control other all of described drive mechanisms during the signal moving or rotating
(6) it is synchronized with the movement.
Three Degree Of Freedom secondary mirror adjusting apparatus the most according to claim 4, it is characterised in that described control system also includes using
Synchronize the driver (11) of start and stop in the drive mechanism (6) controlling all of described drive mechanism, described driver (11) receives
The signal that described controller (10) sends, to realize distance and the angle of rotation of displacement sensors (9) movement of all of institute
Identical.
6. according to the Three Degree Of Freedom secondary mirror adjusting apparatus described in any one of claim 1-5, it is characterised in that described drive mechanism
It is two groups, and is arranged symmetrically with along the centerline system optical axis of described lens barrel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610871476.1A CN106291907B (en) | 2016-09-30 | 2016-09-30 | A kind of Three Degree Of Freedom secondary mirror adjusting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610871476.1A CN106291907B (en) | 2016-09-30 | 2016-09-30 | A kind of Three Degree Of Freedom secondary mirror adjusting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106291907A true CN106291907A (en) | 2017-01-04 |
| CN106291907B CN106291907B (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610871476.1A Expired - Fee Related CN106291907B (en) | 2016-09-30 | 2016-09-30 | A kind of Three Degree Of Freedom secondary mirror adjusting apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112645A (en) * | 2019-05-30 | 2019-08-09 | 中国科学院长春光学精密机械与物理研究所 | A kind of automatic regulating system and method for laser resonator resonant reflec-tors |
| CN114296211A (en) * | 2021-12-30 | 2022-04-08 | 中国科学院长春光学精密机械与物理研究所 | High-precision secondary mirror repeated positioning device |
| CN114624853A (en) * | 2022-04-04 | 2022-06-14 | 中国科学院长春光学精密机械与物理研究所 | Dynamic adjusting device for pose of secondary mirror of large-caliber telescope |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114296211A (en) * | 2021-12-30 | 2022-04-08 | 中国科学院长春光学精密机械与物理研究所 | High-precision secondary mirror repeated positioning device |
| CN114624853A (en) * | 2022-04-04 | 2022-06-14 | 中国科学院长春光学精密机械与物理研究所 | Dynamic adjusting device for pose of secondary mirror of large-caliber telescope |
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| Publication number | Publication date |
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| CN106291907B (en) | 2018-10-19 |
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Granted publication date: 20181019 Termination date: 20200930 |