CN113933957A - Non-magnetic optical mirror bracket for cold atom detection - Google Patents
Non-magnetic optical mirror bracket for cold atom detection Download PDFInfo
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- CN113933957A CN113933957A CN202111538835.9A CN202111538835A CN113933957A CN 113933957 A CN113933957 A CN 113933957A CN 202111538835 A CN202111538835 A CN 202111538835A CN 113933957 A CN113933957 A CN 113933957A
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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
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/1821—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors for rotating or oscillating mirrors
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Abstract
The utility model provides a no magnetism optical lens frame for cold atom is surveyed, is provided with 1 at least optical lens frame on the mount pad, optical lens frame has the Y direction swivel mount for X direction swivel mount internal rotation hookup, and Y direction swivel mount center processing has the lens mounting hole, and the side of X direction swivel mount is provided with first worm, is provided with the first worm wheel with first worm engaged with on the Y direction swivel mount, and the central axis of Y direction swivel mount lens mounting hole is perpendicular with the central axis of first worm wheel, and the central axis of first worm wheel is the axis of rotation of Y direction swivel mount, and X direction swivel mount top is provided with the second worm, and the fixed setting of second worm wheel with second worm engaged with is on the mount pad, and the central axis of second worm wheel is the axis of rotation of X direction swivel mount. The invention has the characteristics of simple structure, convenient adjustment and small volume, and is very suitable for the occasions with the requirement on stray magnetic fields below hundreds of nT magnitude.
Description
Technical Field
The invention belongs to the technical field of optical elements, and particularly relates to a non-magnetic optical mirror bracket for cold atom detection.
Background
With the development and maturity of cold atom related technology, the precision of the high-precision cold atom fountain clock, cold atom gravimeter and other devices utilizing the cold atom interference technology at present exceeds that of the traditional atomic clock and gravimeter. Cold atom interferometric gyroscopes, while having many problems with distance engineering, still have significant accuracy advantages over traditional gyroscopes.
The signal detection of the above-mentioned devices generally employs a fluorescence detection method. The fluorescence detection method generally refers to that fluorescence emitted by interaction of detection light and cold radicals is converged on a photoelectric detector through a lens group in a fluorescence collection lens barrel, and is converted into an electric signal through a subsequent low-noise photoelectric conversion circuit of the photoelectric detector, so that a signal required by the device is generated, and therefore, the detection efficiency is a very important index for fluorescence detection. The fluorescence detection process is specifically described below by taking a cold atom fountain clock as an example.
The fluorescence detection of the cold atomic clock generally adopts dual-energy level detection. Two standing waves at a certain distance are required to be formed in the vertical direction of a space in the double-energy-level detection mode, each standing wave meets a cold atomic group falling vertically and is excited to emit fluorescence, the fluorescence signals are collected by a fluorescence collecting lens barrel corresponding to the fluorescence collecting lens barrel and are converted into voltage signals, the voltage signals represent the number of atoms at the atomic energy level, and finally the signals required by a cold atomic clock are determined by utilizing the atomic number proportional relation of two atomic energy levels. Fig. 1 is a diagram of a cold atomic clock detection principle, wherein a dotted line represents a falling direction of a cold atomic group, a solid line represents a detection light direction emitted by a detection light collimating lens barrel and a reflection light direction of a reflector, an emergent light and a reflection light form a standing wave field required for detection, and a fluorescence collecting lens barrel is arranged in a direction perpendicular to a paper surface.
The detection efficiency is a very important index for the fluorescence detection of the cold atomic clock. An important factor affecting the efficiency of fluorescence detection is the stray field induced by the detection device (including the probe light collimating lens, the fluorescence collecting lens and the mirror mount), the lower the stray field, the better. For the detection area of the cold atomic clock, the stray magnetic field introduced by the detection device is required to be less than several hundred nT. The detection light collimating lens barrel, the fluorescence collecting lens barrel and the detection area body in the existing detection device are made of weak magnetic materials such as titanium alloy and aluminum, but a commercial reflector frame is generally adopted as a mirror frame assembled with a reflector. Adjusting screws and springs are generally adopted in the adjusting structure of the commercial mirror holder in the two-dimensional direction, as shown in fig. 2, the stray magnetic field introduced by the adjusting structure is in several uT orders, and as the reflecting mirror holder is generally close to the main body of the detection area, the stray magnetic field in the order has a larger influence on the detection efficiency, and further influences the detection accuracy. Although weak magnetic materials can be used for producing corresponding springs, the application of the springs is directly influenced by overhigh cost or poor effect of the springs.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a nonmagnetic optical lens bracket for cold atom detection, which has the advantages of reasonable design, simple structure, high precision and convenient adjustment.
The technical scheme for solving the technical problems is as follows: a non-magnetic optical lens bracket for cold atom detection, at least 1 non-magnetic optical lens bracket is arranged on a non-magnetic mounting seat, the optical lens bracket is a Y-direction rotating bracket which is rotationally connected with the X-direction rotating bracket, a lens mounting hole is processed at the center of the Y-direction rotating bracket, a first worm is arranged on the side surface of the X-direction rotating frame, a first worm wheel meshed with the first worm is arranged on the Y-direction rotating frame, the central axis of the lens mounting hole of the Y-direction rotating frame is vertical to the central axis of the first worm wheel, the central axis of the first worm wheel is the rotation axis of the Y-direction rotating frame, the top of the X-direction rotating frame is provided with a second worm, and a second worm wheel meshed with the second worm is fixedly arranged on the mounting seat, and the central axis of the second worm wheel is the rotation axis of the X-direction rotating frame.
As a preferred technical scheme, a connecting shaft is arranged between the second worm wheel and the mounting seat, the connecting shaft and the second worm wheel are connected into a whole, a first damping ring is sleeved on the connecting shaft, and the first damping ring is located between the mounting seat 1 and the X-direction rotating frame.
As a preferred technical scheme, the X-direction rotating frame is an inverted U-shaped body, countersunk holes are symmetrically processed in two side walls of the X-direction rotating frame, an auxiliary rotating connecting piece fixedly connected with the Y-direction rotating frame is installed in the countersunk hole in one side in a matched mode, and a first worm wheel fixedly connected with the Y-direction rotating frame is installed in the countersunk hole in the other side in a matched mode.
As a preferred technical scheme, a second damping ring is further installed in the countersunk hole where the auxiliary rotating connecting piece is located; the first worm and the second worm are both cylindrical worms.
Preferably, the modulus m of the first worm is 0.3, and the number of heads Z is1The pressure angle alpha is 1, the pressure angle alpha is 20 degrees, the reference circle diameter is 4-8 mm, and the transmission ratio is 60; the second worm is the same as the first worm.
As a preferable technical solution, the end portions of the first worm and the second worm are provided with adjusting hand wheels.
As a preferable technical solution, the mounting seat, the X-direction rotating frame, the Y-direction rotating frame, the first worm wheel, the second worm, and the second worm wheel are made of aluminum alloy or titanium alloy.
The invention has the following beneficial effects:
the invention adopts the matching use of two worm drive mechanisms to realize the angle adjustment of the spectacle frame for mounting the lenses in the two-dimensional direction, abandons the traditional adjusting screw and spring structure, is made of nonmagnetic materials, introduces stray magnetic field of about 100nT, is lower than that of the traditional commercial spectacle frame by more than 1 magnitude, has the characteristics of simple structure, convenient adjustment and small volume, and is very suitable for being used in occasions requiring the stray magnetic field to be less than hundreds of nT magnitude.
Drawings
FIG. 1 is a diagram of the cold atomic clock detection principle.
Figure 2 is a schematic view of a commercial frame construction.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is a top view of the first optical frame 2 of fig. 3.
Fig. 5 is a sectional view a-a of fig. 4.
Fig. 6 is a sectional view B-B of fig. 4.
Wherein: a mounting base 1; a first optical frame 2; a second optical frame 3; an X-direction rotating frame 2-1; a connecting shaft 2-2; a first damping ring 2-3; a first hand wheel 2-4; 2-5 of a second hand wheel; 2-6 of a Y-direction rotating frame; a first worm 2-7; a first worm gear 2-8; auxiliary rotating connecting pieces 2-9; 2-10 parts of a second damping ring; a second worm gear 2-11; a second worm 2-12.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and examples, but the present invention is not limited to the embodiments described below.
In fig. 3 to 6, a nonmagnetic optical frame for cold atom detection in this embodiment is formed by connecting an installation base 1, a first optical frame 2, and a second optical frame 3, the installation base 1 is made of aluminum alloy or titanium alloy, the nonmagnetic first optical frame 2 is installed at the top of the installation base 1, the nonmagnetic second optical frame 3 is symmetrically installed at the bottom of the installation base, the first optical frame 2 and the second optical frame 3 have the same structure, the first optical lens is an X-direction rotating frame 2-1 which is rotationally connected with a Y-direction rotating frame 2-6, a lens installation hole is processed at the center of the Y-direction rotating frame 2-6, the X-direction rotating frame 2-1 is an inverted U-shaped body, a left countersunk hole and a right countersunk hole are symmetrically processed on the left side wall and the right side wall of the X-direction rotating frame 2-1, and an auxiliary rotating connecting piece 2-9 is installed in the left countersunk hole in a matching manner, the auxiliary rotary connecting piece 2-9 is fixedly connected with the Y-direction rotating frame 2-6 through a threaded fastener, a second damping ring 2-10 is arranged between the auxiliary rotary connecting piece 2-9 and the inner plane of the left countersunk hole, the second damping ring 2-10 is used for damping in the Y-direction rotary adjusting process to improve the adjusting precision, a first worm mounting hole communicated with the right countersunk hole is machined in the right side wall of the X-direction rotating frame 2-1 and positioned above the right countersunk hole, a first worm 2-7 is arranged in the first worm mounting hole, the modulus m of the first worm 2-7 is 0.3, and the number of heads Z is11, a pressure angle alpha is 20 degrees, the diameter of a reference circle is 6mm, 4mm or 8mm, the transmission ratio is 60, a first worm wheel 2-8 fixedly connected with a Y-direction rotating frame 2-6 through a threaded fastener is arranged in a right countersunk hole in a matching manner, the first worm wheel 2-8 is meshed with a first worm 2-7, and the central axis of the first worm wheel 2-8 isThe central axis of the lens mounting hole of the Y-direction rotating frame 2-6 is vertical to the central axis, the central axis of the first worm wheel 2-8 is the rotation axis of the Y-direction rotating frame 2-6, the end part of the first worm 2-7 is fixedly provided with a first hand wheel 2-4, the first hand wheel 2-4 is rotated, the first worm 2-7 rotates to drive the first worm wheel 2-8 to rotate, and the Y-direction rotating frame 2-6 rotates along with the rotation of the first worm wheel 2-8 due to the fixed connection of the first worm wheel 2-8 and the Y-direction rotating frame 2-6, so that the rotation angle of the Y-direction rotating frame 2-6 in the Y direction is adjusted; the top of an X-direction rotating frame 2-1 is provided with a first countersunk hole and a second worm mounting hole, the second worm mounting hole is communicated with the first countersunk hole, a connecting shaft 2-2 and a second worm wheel 2-11 are connected into a whole and are mounted in the first countersunk hole, a second worm 2-12 meshed with the second worm wheel 2-11 is mounted in the second worm mounting hole, the structure of the second worm 2-12 is the same as that of the first worm 2-7, the end part of the second worm 2-12 is provided with a second hand wheel 2-5, a first damping ring 2-3 is sleeved on the connecting shaft 2-2, the first damping ring 2-3 is positioned between the mounting seat 1 and the X-direction rotating frame 2-1, the connecting shaft 2-3 is used for providing certain damping in the X-direction rotation adjustment process and improving the adjustment precision, the first damping ring 2-2 is fixedly mounted on the mounting seat 1 through a threaded fastener, the central axis of the second worm wheel 2-11 is the rotation axis of the X-direction rotating frame 2-1, the second worm 2-12 rotates around the second worm wheel 2-11 while self-transmitting by rotating the second hand wheel 2-5, the Y-direction rotating frame 2-6 is installed on the X-direction rotating frame 2-1 because the second worm 2-12 is installed on the X-direction rotating frame 2-1, the X-direction rotating frame 2-1 and the Y-direction rotating frame 2-6 rotate around the central axis of the second worm wheel 2-11 in the X direction at the same time, thereby adjusting the rotation angle of the Y-direction rotating frame 2-6 in the X direction; in the embodiment, the X-direction rotating frame 2-1, the Y-direction rotating frame 2-6, the first worm 2-7, the first worm wheel 2-8, the second worm 2-12, the second worm wheel 2-11, the connecting shaft 2-2 and the auxiliary rotating connecting piece 2-9 are made of aluminum alloy or titanium alloy, the second damping ring 2-10 and the first damping ring 2-3 are made of polytetrafluoroethylene, and a stray magnetic field introduced by the nonmagnetic optical mirror bracket for cold atom detection is about 100 nT.
Claims (8)
1. A nonmagnetic optical frame for cold atom detection, characterized in that: at least 1 nonmagnetic optical lens frame is arranged on a nonmagnetic mounting seat (1), the optical lens frame is rotationally connected with a Y-direction rotating frame (2-6) in an X-direction rotating frame (2-1), a lens mounting hole is processed in the center of the Y-direction rotating frame (2-6), a first worm (2-7) is arranged on the side surface of the X-direction rotating frame (2-1), a first worm wheel (2-8) meshed with the first worm (2-7) is arranged on the Y-direction rotating frame (2-6), the central axis of the lens mounting hole of the Y-direction rotating frame (2-6) is vertical to the central axis of the first worm wheel (2-8), and the central axis of the first worm wheel (2-8) is the rotation axis of the Y-direction rotating frame (2-6), the top of the X-direction rotating frame (2-1) is provided with a second worm (2-12), a second worm wheel (2-11) meshed with the second worm (2-12) is fixedly arranged on the mounting base (1), and the central axis of the second worm wheel (2-11) is the rotation axis of the X-direction rotating frame (2-1).
2. A nonmagnetic optical frame for cold atom detection as recited in claim 1, wherein: a connecting shaft (2-2) is arranged between the second worm wheel (2-11) and the mounting seat (1), the connecting shaft (2-2) and the second worm wheel (2-11) are connected into a whole, a first damping ring (2-3) is sleeved on the connecting shaft (2-2), and the first damping ring (2-3) is located between the mounting seat (1) and the X-direction rotating frame (2-1).
3. A nonmagnetic optical frame for cold atom detection as recited in claim 1, wherein: the X-direction rotating frame (2-1) is an inverted U-shaped body, countersunk holes are symmetrically processed in two side walls of the X-direction rotating frame (2-1), an auxiliary rotating connecting piece (2-9) fixedly connected with the Y-direction rotating frame (2-6) is installed in the countersunk hole in one side in a matched mode, and a first worm wheel (2-8) fixedly connected with the Y-direction rotating frame (2-6) is installed in the countersunk hole in the other side in a matched mode.
4. A nonmagnetic optical frame for cold atom detection as recited in claim 3, wherein: and a second damping ring (2-10) is also arranged in the countersunk hole where the auxiliary rotating connecting piece (2-9) is positioned.
5. A nonmagnetic optical frame for cold atom detection as recited in claim 1, wherein: the first worm (2-7) and the second worm (2-12) are both cylindrical worms.
6. The non-magnetic optical mount for cold atom detection of claim 5, wherein: the modulus m of the first worm (2-7) is 0.3, and the number of heads Z1The pressure angle alpha is 1, the pressure angle alpha is 20 degrees, the reference circle diameter is 4-8 mm, and the transmission ratio is 60; the second worm (2-12) is the same as the first worm (2-7).
7. A nonmagnetic optical frame for cold atom detection as recited in claim 1, wherein: the end parts of the first worm (2-7) and the second worm (2-12) are provided with adjusting hand wheels.
8. A nonmagnetic optical frame for cold atom detection as recited in claim 1, wherein: the mounting seat (1), the X-direction rotating frame (2-1), the Y-direction rotating frame (2-6), the first worm (2-7), the first worm wheel (2-8), the second worm (2-12) and the second worm wheel (2-11) are made of aluminum alloy or titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538835.9A CN113933957B (en) | 2021-12-16 | 2021-12-16 | Non-magnetic optical mirror bracket for cold atom detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538835.9A CN113933957B (en) | 2021-12-16 | 2021-12-16 | Non-magnetic optical mirror bracket for cold atom detection |
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| Publication Number | Publication Date |
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| CN113933957A true CN113933957A (en) | 2022-01-14 |
| CN113933957B CN113933957B (en) | 2022-03-08 |
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| CN202111538835.9A Active CN113933957B (en) | 2021-12-16 | 2021-12-16 | Non-magnetic optical mirror bracket for cold atom detection |
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Citations (7)
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| US20090272887A1 (en) * | 2008-05-01 | 2009-11-05 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Single-Shot Spatially-Resolved Imaging Magnetometry using Ultracold Atoms |
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| CN211653276U (en) * | 2019-09-18 | 2020-10-09 | 上海视疆科学仪器有限公司 | Full-automatic shearing vector adjusting mechanism for shearing speckles |
| CN211907945U (en) * | 2020-04-23 | 2020-11-10 | 无锡迈微光电科技有限公司 | Stabilizing device for realizing two-dimensional angle continuous adjustment of reflector |
| US20200386906A1 (en) * | 2017-12-15 | 2020-12-10 | The University Of Birmingham | Gravity gradiometer |
| CN213691472U (en) * | 2020-10-19 | 2021-07-13 | 中国科学院国家授时中心 | Magnetic field compensation coil bracket for atomic fountain clock magneto-optical trap |
-
2021
- 2021-12-16 CN CN202111538835.9A patent/CN113933957B/en active Active
Patent Citations (7)
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| US20090272887A1 (en) * | 2008-05-01 | 2009-11-05 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Single-Shot Spatially-Resolved Imaging Magnetometry using Ultracold Atoms |
| CN103558197A (en) * | 2013-11-05 | 2014-02-05 | 北京航空航天大学 | Cold atom number detecting device |
| US20200386906A1 (en) * | 2017-12-15 | 2020-12-10 | The University Of Birmingham | Gravity gradiometer |
| CN211653276U (en) * | 2019-09-18 | 2020-10-09 | 上海视疆科学仪器有限公司 | Full-automatic shearing vector adjusting mechanism for shearing speckles |
| CN111239653A (en) * | 2020-02-10 | 2020-06-05 | 致真精密仪器(青岛)有限公司 | Magnetic imaging device and imaging method based on diamond NV color center and Kerr effect |
| CN211907945U (en) * | 2020-04-23 | 2020-11-10 | 无锡迈微光电科技有限公司 | Stabilizing device for realizing two-dimensional angle continuous adjustment of reflector |
| CN213691472U (en) * | 2020-10-19 | 2021-07-13 | 中国科学院国家授时中心 | Magnetic field compensation coil bracket for atomic fountain clock magneto-optical trap |
Non-Patent Citations (2)
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| P.ROSENBUSCH: "《Reflection of cold atoms by a cobalt single crystal》", 《APPLIED PHYSICS B-LASERS AND OPTICS》 * |
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