CN201266249Y - Mechanical adjustable optical attenuator - Google Patents
Mechanical adjustable optical attenuator Download PDFInfo
- Publication number
- CN201266249Y CN201266249Y CNU2008201514604U CN200820151460U CN201266249Y CN 201266249 Y CN201266249 Y CN 201266249Y CN U2008201514604 U CNU2008201514604 U CN U2008201514604U CN 200820151460 U CN200820151460 U CN 200820151460U CN 201266249 Y CN201266249 Y CN 201266249Y
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- light
- face
- mechanical type
- type adjustable
- collimating apparatus
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Abstract
A mechanical adjustable optical attenuator comprises a shell, an input optical fiber collimator, an attenuation body, an output optical fiber collimator and a drive unit, wherein the input optical fiber collimator and the output optical fiber collimator are arranged in a sleeve which passes through the wall of the shell and is fixedly connected with the shell; an attenuation cavity is arranged between the input optical fiber collimator and the output optical fiber collimator; the drive unit comprises a drive and a connecting piece, and the shaft of the drive is perpendicular to the axis of the sleeve; a beam passes through the attenuation body and enters the output optical fiber collimator from the input optical fiber collimator; the orthogonal projection of the optical shielding side of the attenuation body, which is formed on a plane perpendicular to a beam, comprises a proximal base, a distal tip and an inner concave sideline arranged between the proximal base and the distal tip; and the optical shielding side is in a shaped thinning gradually from the proximal base to the distal tip. The attenuator adopts the attenuation body in the shape thinning gradually and with the periphery being inwards concave, attenuates the beam through adjusting the position of the optical shielding side corresponding to the beam, improves the attenuation precision and the attenuation speed and reduces the interference.
Description
Technical field:
The utility model relates to physical field, relates in particular to optical device, particularly a kind of mechanical type adjustable optical attenuator.
Background technology:
Adjustable optical attenuator is used to the light beam of decaying in optical fiber telecommunications system.The adjustable optical attenuator of light-keeping-off type can be realized the beam attenuation of Wavelength-independent, polarization insensitive, has higher reliability and repeatability.In addition, the attenuation range of light-keeping-off type attenuator is wide, makes also relatively easy.But light-keeping-off type attenuator volume is relatively large, and will obtain little machining tolerance and control that high-precision decay need be very fine.In U.S. Patent No. 6167185, people such as Smiley have introduced a kind of optical attenuator can keep light polarization when realizing beam attenuation.This optical attenuator has used the beam attenuation body during light beam in decay, the beam attenuation body has a wedge shape on the vertical plane of beam direction transversal section.People such as Smiley point out that this attenuator can keep its polarization state in very big attenuation range, but its attenuation accuracy is subjected to attenuator size and the restriction of regulating accuracy.
Summary of the invention:
The purpose of this utility model is to provide a kind of mechanical type adjustable optical attenuator, the technical matters that the decay body size that described this mechanical type adjustable optical attenuator will solve light-keeping-off type optical attenuator in the prior art is big, attenuation accuracy is subjected to decaying the body size restrictions.
This mechanical type adjustable optical attenuator of the present utility model is by housing, the input optical fibre collimating apparatus, the decay body, output optical fibre collimating apparatus and drive unit constitute, wherein, described input optical fibre collimating apparatus and the accurate device of output optical fibre are arranged in the sleeve pipe, described sleeve pipe passes the sidewall of described housing and fixedlys connected with housing, be provided with damping chamber between input optical fibre collimating apparatus and the output optical fibre collimating apparatus, described drive unit is made of driver and web member, the axle of described driver is perpendicular to the axis of sleeve pipe, described decay body is arranged in described damping chamber, the decay body is connected with driver by described web member, the face that is in the light of decay body is made of the indent sideline between nearly substrate and the sharp distal tip in the orthogonal projection on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus, and the described face that is in the light diminishes to described sharp distal tip gradually from described nearly substrate.
Further, the described face of being in the light is that a straight line with the light beam that sends perpendicular to the input optical fibre collimating apparatus is the part of the semi-cylindrical of central shaft, and the described face that is in the light is tapered to distal tip from described nearly substrate along its pairing attitude.
Further, each bar sideline orthogonal projection on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light comprises one section circular arc at least.
Further, each bar sideline orthogonal projection on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light is made of circular arc.
Further, two orthogonal projection of sideline on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light are two sections circular arcs with respect to described optical attenuation body cross central line symmetry, and described circular arc is an axis normal in the intersection on the face of cylinder at the face of cylinder of the central shaft on the face of cylinder at the described face place of being in the light and the described face place of being in the light.
Further, the light beam that sends of input optical fibre collimating apparatus and the described minimum incident angle between the face of being in the light are greater than 8 degree.
Further, the major part of the orthogonal projection of sideline on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus between the sharp distal tip of the described face that is in the light and the described nearly substrate is the curve of indent, the curve that is projected as convexity or evagination of the sideline part of close described nearly substrate.
Further, described nearly substrate has constant height, and the corresponding attitude greater than zero degree of described nearly substrate.
Further, any orthogonal projection of sideline on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light is a para-curve.
Further, each bar sideline of the described face that is in the light is being a hyperbolic curve perpendicular to the orthogonal projection on the plane of described light beam.
Further, described driver is a motor, and the output shaft of described motor is connected with the decay body by web member, and motor is arranged in the guide hole of housing, and impermeability is connected between the lateral wall of motor and the guide hole.
Further, impermeability connects between described sleeve pipe and the described housing.
Further, described decay body is a solid construction, and the outside surface of described decay body is the described face that is in the light.
Further, described decay body is that xsect is oval sleeve pipe, and the outside surface of described sleeve pipe is the described face that is in the light.
Principle of work of the present utility model is: meter case penetrates mounting hole, and clamping components inserts direction recess on the meter case at the rear side of instrument installing plate, and the instrument installing plate is clamped between the back up pad of the front end of meter case and clamping components.Step in the slide block side cooperates with the retaining block of retaining bar, can fixedly secure clamping components and meter case.By pushing the squeeze grip of slide block rear end, the retaining block of step in the slide block side and retaining bar can be broken away from, realize dismounting.
The utility model is compared with prior art, and its effect is actively with tangible.The utility model adopts the border indent and is the decay body of tapered shape in attenuator, light beam is decayed with respect to the position of light beam by the adjusting face that is in the light, and has improved decay its precision and rate of decay, and has reduced and disturb.
Description of drawings:
Fig. 1 is the synoptic diagram of an embodiment in optical system of mechanical type adjustable optical attenuator of the present utility model.
Fig. 2 is the structural representation of mechanical type adjustable optical attenuator of the present utility model.
Fig. 3 is the structural representation of the attenuation of the first kind body in the mechanical type adjustable optical attenuator of the present utility model.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the side view of Fig. 3.
Fig. 6 is another side view of Fig. 3.
Fig. 7 is that the attenuation of the second kind body in the mechanical type adjustable optical attenuator of the present utility model is in the position view that does not block light beam.
Fig. 8 is that the attenuation of the second kind body in the mechanical type adjustable optical attenuator of the present utility model is in the position view that part is blocked light beam.
Fig. 9 is that the attenuation of the second kind body in the mechanical type adjustable optical attenuator of the present utility model is in the position view that blocks light beam fully.
Figure 10 is the structural representation of the third decay body in the mechanical type adjustable optical attenuator of the present utility model.
Figure 11 is the vertical view of Figure 10.
Figure 12 is the side view of Figure 10.
Figure 13 is another side view of Figure 10.
Figure 14 is the vertical view of the 4th kind of decay body in the mechanical type adjustable optical attenuator of the present utility model.
Figure 15 is the vertical view of the 5th kind of decay body in the mechanical type adjustable optical attenuator of the present utility model.
Figure 16 is the vertical view of the 6th kind of decay body in the mechanical type adjustable optical attenuator of the present utility model.
Embodiment:
Embodiment 1:
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, wherein Fig. 3 is the schematic perspective view of optical attenuation body in the xyz rectangular coordinate system in the utility model, the utility model provides a kind of mechanical type adjustable optical attenuator, adopts to comprise a light source 12 and optical receiver 18 and mechanical type adjustable optical attenuator 20 in the optical system 10 of an embodiment of mechanical type adjustable optical attenuator 20 of the present utility model.A branch of light that light source 12 sends is transferred in the mechanical type adjustable optical attenuator 20 by optical fiber 14, and optical receiver 18 receives the light that transmission is come out from mechanical type adjustable optical attenuator 20 by output optical fibre 16.Mechanical type adjustable optical attenuator 20 is made of housing 22, input optical fibre collimating apparatus 261, decay body 32, output optical fibre collimating apparatus 262 and drive unit, input optical fibre collimating apparatus 261, output optical fibre collimating apparatus 262 have lens 281, lens 282 respectively, lens the 281, the 282nd, gradient-index lens, or any other lens.The light beam that light beam 50 between two collimating apparatuss will be attenuated exactly.Wherein, described input optical fibre collimating apparatus 261 and output optical fibre collimating apparatus 262 are arranged in the sleeve pipe 24, described sleeve pipe 24 passes the sidewall of described housing 22 and fixedlys connected with housing 22, be provided with damping chamber 30 between described input optical fibre collimating apparatus 261 and the output optical fibre collimating apparatus 262, described drive unit is made of driver 44 and web member 42, axle 40 the axis of described driver 44 perpendicular to described sleeve pipe 24, described decay body 32 is arranged in described damping chamber 30, described decay body 32 links to each other with described driver 44 by described web member 42, light beam 50 enters described output optical fibre collimating apparatus 262 from described input optical fibre collimating apparatus 261 through overdamping body 32, the face that is in the light 35 of described decay body 32 perpendicular to the orthogonal projection on the plane of described light beam 50 by nearly substrate 36, sharp distal tip 38 constitutes with indent sideline 37 between the two, and the described face 35 that is in the light is tapered shape from described nearly substrate 36 to described sharp distal tip 38.The face 35 that is in the light is made of light-proof material or light absorbent.
Further, it is the part of the semi-cylindrical 39 of central shaft with the straight line 46 perpendicular to described light beam 50 that the described face 35 that is in the light is one, and the described face 35 that is in the light is tapered shape from described nearly substrate 36 to distal tip 38 along its pairing attitude, and the ideal space angle of optical attenuation body 32 is 180 degree.
Further, in embodiment 1, each bar sideline 37 of the described face 35 that is in the light is being made of circular arc perpendicular to the orthogonal projection on the plane of described light beam 50.Two sidelines 37 of the described face 35 that is in the light perpendicular to the orthogonal projection on the plane of described light beam 50 are being two sections circular arcs with respect to described optical attenuation body cross central line symmetry, and described circular arc is an axis normal in the intersection on the face of cylinder 39 at the face of cylinder of the central shaft 46 on the face of cylinder 39 at described face 35 places of being in the light and described face 35 places of being in the light.Processing is convenient in this a kind of sideline 37 of decay body 32.
Further, described light beam 50 and the described minimum incident angle β that is in the light between the face 35 spend greater than 8, so that any reflected light 51 can not reach the light source place of incident beam 50.This moment, the distance of light beam 50 and 35 in the face of being in the light was an optimum value.
Further, described driver 44 is motors 44, the axle 40 of described motor 44 links to each other with described decay body 32 by described web member 42, described motor 44 is arranged in the guide hole 34 of described housing 22, is connected for impermeability between described motor 44 lateral walls and the described guide hole 34.
Further, connect for impermeability between described sleeve pipe 24 and the described housing 22.
Embodiment 2:
As Fig. 7, Fig. 8 and shown in Figure 9, the projection on the yz plane in 521,522,523 o'clock three continuous positions successively of decay body 132.Optical attenuation body 132 can rotate on position as shown in the figure continuously.Sideline 137 between the sharp distal tip 138 of the described face 135 that is in the light and the described nearly substrate 136 is being the curve of indent perpendicular to the major part of the orthogonal projection on the plane of described light beam 50, the curve that is projected as convexity or evagination of sideline 137 parts of close described nearly substrate 136, the sideline 137 of remainder is the circular arc of indent.
Embodiment 3:
As Figure 10, Figure 11, Figure 12 and shown in Figure 13, wherein Figure 10 is the schematic perspective view of optical attenuation body in the xyz rectangular coordinate system in the utility model, described nearly substrate 236 has constant height, and the certain attitude of described nearly substrate 236 correspondences.The face 235 that is in the light is the parts on the face of cylinder 239, and the axis 46 on the face of cylinder 239 is perpendicular to light beam 50, and the face 235 that is in the light is made of nearly substrate 236 and sharp distal tip 238.
Further, each bar sideline 237 of the described face 235 that is in the light is being a hyperbolic curve perpendicular to the orthogonal projection on the plane of described light beam 50, and the decay body 232 of this structure can improve rate of decay under the situation of having sacrificed attenuation accuracy.Sideline 237 also can be a para-curve perpendicular to the orthogonal projection on the plane of described light beam 50.
Embodiment 4:
As shown in figure 14, described decay body 332 is a solid construction, and the outside surface 335 of described decay body 332 is the described face 335 that is in the light.
Embodiment 5:
As shown in figure 15, described decay body 432 is that xsect is oval sleeve pipe 432, and the outside surface of described sleeve pipe 432 is the described face 435 that is in the light.
Embodiment 6:
As shown in figure 16, described decay body 532 is with respect to x axle and the asymmetrical a kind of structure of y axle.
Claims (14)
1. mechanical type adjustable optical attenuator, by housing, the input optical fibre collimating apparatus, the decay body, output optical fibre collimating apparatus and drive unit constitute, it is characterized in that: described input optical fibre collimating apparatus and the accurate device of output optical fibre are arranged in the sleeve pipe, described sleeve pipe passes the sidewall of described housing and fixedlys connected with housing, be provided with damping chamber between input optical fibre collimating apparatus and the output optical fibre collimating apparatus, described drive unit is made of driver and web member, the axle of described driver is perpendicular to the axis of sleeve pipe, described decay body is arranged in described damping chamber, the decay body is connected with driver by described web member, the face that is in the light of decay body is made of the indent sideline between nearly substrate and the sharp distal tip in the orthogonal projection on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus, and the described face that is in the light diminishes to described sharp distal tip gradually from described nearly substrate.
2. mechanical type adjustable optical attenuator as claimed in claim 1, it is characterized in that: the described face of being in the light is that a straight line with the light beam that sends perpendicular to the input optical fibre collimating apparatus is the part of the semi-cylindrical of central shaft, and the described face that is in the light is tapered to distal tip from described nearly substrate along its pairing attitude.
3. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: each bar sideline orthogonal projection on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light comprises one section circular arc at least.
4. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: each bar sideline orthogonal projection on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light is made of circular arc.
5. mechanical type adjustable optical attenuator as claimed in claim 1, it is characterized in that: two orthogonal projection of sideline on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light are two sections circular arcs with respect to described optical attenuation body cross central line symmetry, and described circular arc is an axis normal in the intersection on the face of cylinder at the face of cylinder of the central shaft on the face of cylinder at the described face place of being in the light and the described face place of being in the light.
6. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: light beam that the input optical fibre collimating apparatus is sent and the described minimum incident angle that is in the light between the face are spent greater than 8.
7. mechanical type adjustable optical attenuator as claimed in claim 1, it is characterized in that: the major part of the orthogonal projection of sideline on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus between the sharp distal tip of the described face that is in the light and the described nearly substrate is the curve of indent, the curve that is projected as convexity or evagination of the sideline part of close described nearly substrate.
8. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: described nearly substrate has constant height, and the corresponding attitude greater than zero degree of described nearly substrate.
9. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: any orthogonal projection of sideline on the plane of the light beam that sends perpendicular to the input optical fibre collimating apparatus of the described face that is in the light is a para-curve.
10. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: each bar sideline of the described face that is in the light is being a hyperbolic curve perpendicular to the orthogonal projection on the plane of described light beam.
11. mechanical type adjustable optical attenuator as claimed in claim 1, it is characterized in that: described driver is a motor, the output shaft of described motor is connected with the decay body by web member, and motor is arranged in the guide hole of housing, and impermeability is connected between the lateral wall of motor and the guide hole.
12. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: impermeability connects between described sleeve pipe and the described housing.
13. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: described decay body is a solid construction, and the outside surface of described decay body is the described face that is in the light.
14. mechanical type adjustable optical attenuator as claimed in claim 1 is characterized in that: described decay body is that xsect is oval sleeve pipe, and the outside surface of described sleeve pipe is the described face that is in the light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201514604U CN201266249Y (en) | 2008-07-31 | 2008-07-31 | Mechanical adjustable optical attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201514604U CN201266249Y (en) | 2008-07-31 | 2008-07-31 | Mechanical adjustable optical attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201266249Y true CN201266249Y (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201514604U Expired - Fee Related CN201266249Y (en) | 2008-07-31 | 2008-07-31 | Mechanical adjustable optical attenuator |
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| CN (1) | CN201266249Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102597836A (en) * | 2009-10-15 | 2012-07-18 | 康宁公司 | Coated optical fibers and related apparatuses, links, and methods for providing optical attenuation |
| CN104076452A (en) * | 2013-03-29 | 2014-10-01 | 曹晨 | Optical fiber controller |
| CN107238894A (en) * | 2017-07-17 | 2017-10-10 | 中国科学院上海光学精密机械研究所 | A kind of luminous power adjustable damping device |
| CN110794529A (en) * | 2020-01-06 | 2020-02-14 | 成都新易盛通信技术股份有限公司 | Optical assembly and system thereof |
-
2008
- 2008-07-31 CN CNU2008201514604U patent/CN201266249Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102597836A (en) * | 2009-10-15 | 2012-07-18 | 康宁公司 | Coated optical fibers and related apparatuses, links, and methods for providing optical attenuation |
| CN102597836B (en) * | 2009-10-15 | 2014-11-19 | 康宁公司 | Coated optical fibers and related apparatuses, links, and methods for providing optical attenuation |
| CN104076452A (en) * | 2013-03-29 | 2014-10-01 | 曹晨 | Optical fiber controller |
| CN107238894A (en) * | 2017-07-17 | 2017-10-10 | 中国科学院上海光学精密机械研究所 | A kind of luminous power adjustable damping device |
| CN110794529A (en) * | 2020-01-06 | 2020-02-14 | 成都新易盛通信技术股份有限公司 | Optical assembly and system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20120731 |