CN212846141U - Power attenuation device - Google Patents
Power attenuation device Download PDFInfo
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- CN212846141U CN212846141U CN202021104583.XU CN202021104583U CN212846141U CN 212846141 U CN212846141 U CN 212846141U CN 202021104583 U CN202021104583 U CN 202021104583U CN 212846141 U CN212846141 U CN 212846141U
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Abstract
The utility model provides a power attenuation device, include: the device comprises a base, a first turntable assembly, a second turntable assembly, a first attenuation assembly, a second attenuation assembly and an adjusting mechanism; the adjusting mechanism is in transmission connection with the first rotary disc assembly and the second rotary disc assembly respectively, and drives the first rotary disc assembly and the second rotary disc assembly to rotate in the same direction or in the opposite direction simultaneously, so that the first attenuation assembly and the second attenuation assembly rotate in the same direction or in the opposite direction by the same angle. By implementing the scheme, the whole set of the laser has the advantages of simple and compact structure, convenience in operation, high adjustment precision, high resolution and wide adjustment range, and can adapt to linear polarization and elliptical polarization lasers; the whole structure does not need lubricant and can meet the requirement of higher laser light path cleanliness.
Description
Technical Field
The utility model relates to a laser beam splitting field especially indicates a power attenuation device.
Background
There are two polarization states of laser light, one is linear polarization and one is elliptical polarization. It is common at present that for linearly polarized laser, a laser beam passes through a half-wave plate, and when the half-wave plate rotates by an angle theta around a center as an axis, the linear polarization direction of the laser beam rotates by an angle 2 theta. Then, the laser beam is incident on the polarization splitting plate at a certain incident angle. When the laser beam enters the polarization beam splitter, the laser beam can be decomposed into two directions of p polarization and s polarization, and according to the coating property of the polarization beam splitter, p polarized light is basically transmitted completely (Tp is more than 99%) and s polarized light is basically reflected completely (Rs is more than 99%). The structure is only suitable for linearly polarized laser and cannot realize the spectral power adjustment of the elliptically polarized laser. In addition, the structure enables the realization of laser light splitting to require a front part structure and a rear part structure to be arranged on a laser propagation path, a front manual or electric half wave plate rotating structure and a rear polarization light splitting plate fixing structure, and the whole structure is large in size and not beneficial to the miniaturization of a light path. The manual half-wave plate rotating structure or the half-wave plate bracket is directly rotated to rotate around the axis in the limiting structure, but the mode has poor precision and is too sensitive, so that the manual half-wave plate rotating structure is difficult to control by hand feeling adjustment and has high operation difficulty. Or the worm and gear structure is used for realizing the rotation of the half wave plate with higher precision through the reduction ratio, but the structure usually needs lubricant to normally operate, and the laser light path needs to avoid the hidden trouble of possible light path pollution caused by grease-like or oily lubricant, particularly the ultraviolet laser light path, so the application is limited.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a power attenuation device is provided, aiming at solving the problems that the whole structure has larger size, and the miniaturization is not facilitated, and the design and operation difficulty is large.
In order to solve the technical problem, the utility model discloses a technical scheme be: there is provided a power attenuation apparatus comprising: the device comprises a base, a first turntable assembly, a second turntable assembly, a first attenuation assembly, a second attenuation assembly and an adjusting mechanism;
the first rotary disc assembly and the second rotary disc assembly are rotatably arranged on the base and are close to two ends of the base, and the first rotary disc assembly and the second rotary disc assembly are symmetrically arranged; the first attenuation component is arranged on the first turntable component, and the second attenuation component is arranged on the second turntable component; the adjusting mechanism is arranged in the middle of the base and is in transmission connection with the first rotating disc assembly and the second rotating disc assembly respectively, and the adjusting mechanism drives the first rotating disc assembly and the second rotating disc assembly to rotate in the same direction or in the opposite direction simultaneously so that the first attenuation assembly and the second attenuation assembly rotate in the same direction or in the opposite direction by the same angle.
The adjusting mechanism comprises a rotating shifting fork, an adjusting screw, a first support and a second support, the first support and the second support are arranged on two sides of the base respectively, the adjusting screw penetrates through the first support and the second support, the adjusting screw is in threaded connection with the first support and the second support respectively, the shifting fork is in threaded connection with the adjusting screw, the shifting fork is located between the first support and the second support, and the shifting fork can be rotated to drive the first turntable assembly and the second turntable assembly simultaneously.
The rotating shifting fork is provided with a first driving shaft and a second driving shaft, and one side of the first rotating disc component, which is close to the rotating shifting fork, is provided with a first long pin hole in sliding fit with the first driving shaft; and one side of the second turntable assembly, which is close to the rotating shifting fork, is provided with a second long pin hole in sliding fit with a second driving shaft.
The base is provided with a linear slide rail parallel to the adjusting screw rod, and one side of the rotary shifting fork close to the linear slide rail is provided with a guide rail slide block in sliding fit with the linear slide rail.
The adjusting mechanism further comprises an elastic piece, the elastic piece is sleeved on the adjusting screw rod, one end of the elastic piece is abutted to the rotating shifting fork, and the other end of the elastic piece is abutted to the second support.
Wherein, the elastic component is a spring.
The first rotating disc assembly and the second rotating disc assembly respectively comprise a rotating disc, a rotating shaft and an angular contact bearing, one end of the rotating shaft is fixedly connected with the rotating disc, the other end of the rotating shaft penetrates through the angular contact bearing and is fixedly connected with the angular contact bearing, and the angular contact bearing is fixed on the base.
The first rotating disc assembly and the second rotating disc assembly further comprise shaft end gaskets, and the shaft end gaskets are sleeved on one ends of the rotating shafts penetrating out of the angular contact bearings in a threaded mode.
The first attenuation assembly and the second attenuation assembly respectively comprise an attenuation mirror bracket and attenuation lenses, the attenuation mirror bracket is fixed on the rotary table, and the attenuation lenses are arranged on the attenuation mirror bracket.
The first attenuation component and the second attenuation component further comprise lens pressing plates, and the lens pressing plates are arranged on the attenuation spectacle frame to be in compression joint with the attenuation lenses.
The beneficial effects of the utility model reside in that: the adjusting mechanism is in transmission connection with the first rotary disc assembly and the second rotary disc assembly respectively, and drives the first rotary disc assembly and the second rotary disc assembly to rotate in the same direction or in the opposite direction simultaneously, so that the first attenuation assembly and the second attenuation assembly rotate in the same direction or in the opposite direction by the same angle. The whole structure has the advantages of simplicity, compactness, convenient operation, high adjustment precision, high resolution ratio and wide adjustment range, and can adapt to linear polarization and elliptical polarization lasers.
Drawings
The following detailed description of the specific structure of the present invention with reference to the accompanying drawings
Fig. 1 is a perspective view of a power attenuator according to the present invention;
fig. 2 is a perspective view of another view angle of the power attenuation apparatus of the present invention;
fig. 3 is a front view structural diagram of the power attenuation apparatus of the present invention;
fig. 4 is a top view structural diagram of the power attenuation apparatus of the present invention;
fig. 5 is a bottom view of the power attenuation apparatus of the present invention;
fig. 6 is a sectional structural view of the power attenuator of the present invention;
fig. 7 is a sectional view of the power attenuator of the present invention in a B-B configuration;
fig. 8 is a C-C sectional structural view of the power attenuator of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1 to 3, in the present embodiment, the power attenuation apparatus includes a base 1, a first turntable assembly 3, a second turntable assembly 4, a first attenuation assembly 5, a second attenuation assembly 6, and an adjusting mechanism 2;
the first rotary disc component 3 and the second rotary disc component 4 are both rotatably arranged on the base 1 and are arranged close to two ends of the base 1, and the first rotary disc component 3 and the second rotary disc component 4 are symmetrically arranged; the first attenuation component 5 is arranged on the first rotating disc component 3, and the second attenuation component 6 is arranged on the second rotating disc component 4; the adjusting mechanism 2 is arranged in the middle of the base 1, the adjusting mechanism 2 is in transmission connection with the first rotary disc assembly 3 and the second rotary disc assembly 4 respectively, and the adjusting mechanism 2 drives the first rotary disc assembly 3 and the second rotary disc assembly 4 to rotate in the same direction or in the opposite direction simultaneously, so that the first attenuation assembly 5 and the second attenuation assembly 6 rotate in the same direction or in the opposite direction by the same angle. In fact, the adjusting mechanism 2 drives the first turntable assembly 3 and the second turntable assembly 4 to rotate simultaneously, so as to drive the first attenuation assembly 5 and the second attenuation assembly 6 to rotate, thereby realizing that the whole structure does not need lubricant and can meet the requirement of higher laser path cleanliness, and meanwhile, the whole structure is simple and compact, high in adjusting precision, high in resolution ratio and wide in adjusting range and can meet the requirements of linear polarization and elliptical polarization lasers. And the first attenuation component and the second attenuation component rotate, laser is incident on one of the attenuation components to generate offset, the offset generated by the laser passes through the other attenuation component and rotates by the same offset, and the offset caused by one of the attenuation components is compensated by the other attenuation component, so that the position of a light beam does not change along with the adjustment of the power of the attenuation device.
Specifically, adjustment mechanism 2 includes rotation shift fork 25, adjusting screw 21, first support 23 and second support 24 set up respectively in the both sides of base 1, adjusting screw 21 wears to locate on first support 23 and second support 24, and adjusting screw 21 respectively with first support 23 and 24 threaded connection of second support, rotation shift fork 25 and adjusting screw 21 threaded connection, and rotate shift fork 25 and be located between first support 23 and the second support 24, it can drive first carousel subassembly 3 and second carousel subassembly 4 rotation simultaneously to rotate shift fork 25. In the embodiment, the adjusting screw 21 drives the rotary shifting fork 25 to axially displace along the adjusting screw 21 through the fine-pitch thread transmission, and the adjustment accuracy is improved through the application of the thread transmission; the rotary shifting fork 25 drives the two turntable assemblies to simultaneously and symmetrically rotate.
Specifically, referring to fig. 1 to 8, a first driving shaft 29 and a second driving shaft 28 are disposed on the rotating fork 25, and a first long pin hole slidably engaged with the first driving shaft 29 is disposed on one side of the first rotating disc assembly 3 close to the rotating fork 25; one side of the second rotary table component 4 close to the rotating shifting fork 25 is provided with a second long pin hole in sliding fit with a second driving shaft 28. When the rotary shifting fork 25 and the adjusting screw 21 move axially, the long pin holes on the two turntable assemblies are matched with the driving shaft to rotate along with the long pin holes, so that the attenuation assemblies fixed on the turntable assemblies are driven to rotate. The fit clearance of the driving shaft and the pin hole is small, and the positive and negative adjustment error is smaller.
Specifically, a linear slide rail 27 parallel to the adjusting screw 21 is arranged on the base 1, and a guide rail slide block 26 in sliding fit with the linear slide rail is arranged on one side of the rotary shifting fork 25 close to the linear slide rail 27. The guide rail slide block 26 is matched with the linear guide rail 27 to control the displacement linearity of the shifting fork.
Specifically, the adjusting mechanism 2 further includes an elastic member 22, the elastic member 22 is sleeved on the adjusting screw 21, one end of the elastic member 22 abuts against the rotating fork 25, and the other end of the elastic member 22 abuts against the second support 24. The elastic member 22 is compressed between the second seat 24 and the rotary fork 25, and eliminates the thread fit clearance of the adjusting screw 21 and the rotary fork 25. Further, the elastic member 22 is a spring.
Specifically, the first turntable assembly 3 and the second turntable assembly 4 each include a turntable 30, a rotating shaft 31 and an angular contact bearing 32, one end of the rotating shaft 31 is fixedly connected to the turntable 30, the other end of the rotating shaft 31 penetrates through the angular contact bearing 32 and is fixedly connected to the angular contact bearing 32, and the angular contact bearing 32 is fixed to the base 1. The angular contact bearing 32 positions the rotating shaft 31 and allows the rotating shaft to rotate; the shaft 31 provides a rotational support for the turntable 30.
Specifically, the first and second turntable assemblies 3 and 4 further include a shaft end gasket 33, and the shaft end gasket 33 is sleeved on and screwed to one end of the rotating shaft penetrating through the angular contact bearing 32. The shaft end gasket 33 fixes and pre-tightens the angular contact bearing 32 to prevent the turntable from rotating and axially moving within the range of the fit clearance due to external force.
Specifically, each of the first attenuation module 5 and the second attenuation module 6 includes an attenuation frame (51, 61) and an attenuation lens (52, 62), the attenuation frame (51, 61) is fixed on the turntable 30, and the attenuation lens (52, 62) is disposed on the attenuation frame (51, 61). The turntable 30 rotates to change the angle of the attenuating lenses (52, 62), and the offset of the laser beam caused by one attenuating lens (52, 62) is compensated by the other attenuating lens (52, 62).
Specifically, the first attenuation module 5 and the second attenuation module 6 further comprise lens pressure plates (53, 63), and the lens pressure plates (53, 63) are arranged on the attenuation lens frames (51, 61) so as to press and connect the attenuation lenses (52, 62). The attenuating lenses (52, 62) are fixed to the attenuating frame (51, 61) by means of lens pressure plates (53, 63) so that the positions of the attenuating lenses are not changed.
In the embodiment, the base 1 is a main body of the whole adjustable power attenuator and provides the whole installation reference of the adjustable power attenuator and the relative position reference of each part; by utilizing the characteristics that the attenuation lenses (52 and 62) rotate and the reflectivity of the attenuation lenses changes along with the incident angle of laser, the power regulation and the compensation of the influence of laser refraction on a laser propagation path are realized through the two attenuation lenses (52 and 62) which rotate symmetrically at the front and the back, namely, the laser is reflected and transmitted in different proportions by regulating the angle of the first attenuation lens, then the offset of the laser beam is compensated back through the second attenuation lens which rotates relatively and has the same thickness and the same refractive index, and the attenuation mirror frame is disassembled and arranged on the turntable assembly. Preferably, the bottom of the attenuation mirror bracket is provided with a screw hole, the screw hole and the rotary disc assembly are provided with threaded holes which are arranged oppositely, the rotary disc assembly and the attenuation assembly are fixed together through the screw, and the attenuation mirror bracket is integrally rectangular.
In this embodiment, adjusting screw and rotation shift fork screw-thread fit realize rotating shift fork linear displacement through the screw thread transmission, rotate the shift fork and will rotate the linear motion conversion of shift fork into the rotary motion of carousel through the drive shaft to realize the reduction lens on the carousel and rotate. Meanwhile, the application of the thread transmission simply realizes higher adjustment resolution. Because the two driving shafts and the two rotating discs are symmetrically arranged, when the shifting fork is rotated to move, the two rotating discs are driven to simultaneously and symmetrically rotate, so that the second attenuation lens can enable the transmitted laser to deviate the same displacement along the direction opposite to the direction of laser beam deviation caused by the first attenuation lens, and finally the effect that the emergent laser beam does not shift along with the adjustment of the adjustable power attenuator is formed. The whole set of the laser has the advantages of simple and compact structure, high adjustment precision, high resolution, wide adjustment range and capability of eliminating the influence of play on the adjustment precision and simultaneously adapting to linear polarization laser and elliptical polarization laser. The characteristics that the reflectivity of the attenuation lens changes along with the incident angle of laser are utilized, the influence of power regulation and compensation laser refraction on a laser propagation path is realized through the two attenuation lenses which are symmetrically rotated simultaneously in the front and back, and the two turnplates are driven to symmetrically rotate simultaneously by utilizing the matching of the driving shafts of the two linear motions and the long pin holes arranged on the turnplates through the threaded transmission. The whole structure does not need lubricant and can meet the requirement of higher laser light path cleanliness.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A power attenuation apparatus, comprising: the device comprises a base, a first turntable assembly, a second turntable assembly, a first attenuation assembly, a second attenuation assembly and an adjusting mechanism;
the first rotary disc assembly and the second rotary disc assembly are rotatably arranged on the base and are close to two ends of the base, and the first rotary disc assembly and the second rotary disc assembly are symmetrically arranged; the first attenuation component is arranged on the first turntable component, and the second attenuation component is arranged on the second turntable component; the adjusting mechanism is arranged in the middle of the base and is in transmission connection with the first rotating disc assembly and the second rotating disc assembly respectively, and the adjusting mechanism drives the first rotating disc assembly and the second rotating disc assembly to rotate in the same direction or in the opposite direction simultaneously so that the first attenuation assembly and the second attenuation assembly rotate in the same direction or in the opposite direction by the same angle.
2. The power attenuation device according to claim 1, wherein the adjusting mechanism includes a rotary fork, an adjusting screw, a first support and a second support, the first support and the second support are respectively disposed on two sides of the base, the adjusting screw is disposed through the first support and the second support, the adjusting screw is respectively in threaded connection with the first support and the second support, the rotary fork is in threaded connection with the adjusting screw, and the rotary fork is disposed between the first support and the second support, and the rotary fork can simultaneously drive the first turntable assembly and the second turntable assembly to rotate.
3. The power attenuation device as claimed in claim 2, wherein the rotary fork has a first driving shaft and a second driving shaft, and the first turntable assembly has a first elongated pin hole slidably engaged with the first driving shaft on a side thereof adjacent to the rotary fork; and one side of the second turntable assembly, which is close to the rotating shifting fork, is provided with a second long pin hole in sliding fit with a second driving shaft.
4. The power attenuation device according to claim 3, wherein the base is provided with a linear rail parallel to the adjusting screw, and a side of the rotary fork adjacent to the linear rail is provided with a guide rail slider slidably engaged with the linear rail.
5. The power attenuation apparatus of claim 3, wherein the adjustment mechanism further comprises an elastic member, the elastic member is sleeved on the adjustment screw, one end of the elastic member abuts against the rotary fork, and the other end of the elastic member abuts against the second support.
6. The power attenuation apparatus of claim 5, wherein the resilient member is a spring.
7. The power attenuation apparatus according to claim 1, wherein the first and second turntable assemblies each comprise a turntable, a rotating shaft and an angular contact bearing, one end of the rotating shaft is fixedly connected to the turntable, the other end of the rotating shaft penetrates through the angular contact bearing and is fixedly connected to the angular contact bearing, and the angular contact bearing is fixed to the base.
8. The power attenuation apparatus of claim 7, wherein the first and second disk assemblies further comprise a shaft end spacer, and the shaft end spacer is sleeved on and screwed with one end of the rotating shaft penetrating out of the angular contact bearing.
9. The power attenuation apparatus of claim 7, wherein the first attenuation module and the second attenuation module each comprise an attenuation frame secured to the turntable and an attenuation lens disposed on the attenuation frame.
10. The power attenuation apparatus of claim 9, wherein the first attenuation module and the second attenuation module further comprise a lens pressure plate disposed on the attenuating frame for pressing the attenuating lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021104583.XU CN212846141U (en) | 2020-06-15 | 2020-06-15 | Power attenuation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021104583.XU CN212846141U (en) | 2020-06-15 | 2020-06-15 | Power attenuation device |
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| Publication Number | Publication Date |
|---|---|
| CN212846141U true CN212846141U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021104583.XU Active CN212846141U (en) | 2020-06-15 | 2020-06-15 | Power attenuation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113741024A (en) * | 2021-08-11 | 2021-12-03 | 中国工程物理研究院应用电子学研究所 | Split type continuous variable density attenuator device and working method thereof |
-
2020
- 2020-06-15 CN CN202021104583.XU patent/CN212846141U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113741024A (en) * | 2021-08-11 | 2021-12-03 | 中国工程物理研究院应用电子学研究所 | Split type continuous variable density attenuator device and working method thereof |
| CN113741024B (en) * | 2021-08-11 | 2023-03-28 | 中国工程物理研究院应用电子学研究所 | Split type continuous variable density attenuator device and working method thereof |
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