CN103267497B - Based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle - Google Patents
Based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle Download PDFInfo
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- CN103267497B CN103267497B CN201310194313.0A CN201310194313A CN103267497B CN 103267497 B CN103267497 B CN 103267497B CN 201310194313 A CN201310194313 A CN 201310194313A CN 103267497 B CN103267497 B CN 103267497B
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Abstract
Based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle, belong to sensory field of optic fibre.Solve existing fiber collimating apparatus cannot measure-the problem of the angle of fiber spinning collimating apparatus mechanical axis and optical axis.Its method: plane mirror is adjusted to the maximum P of power that light power meter receives light signal
max, repeatedly regulate position angle or the angle of pitch of plane mirror, and adopt light power meter to measure each luminous power P
i; Calculate P
i/ P
maxvalue, draw P
i/ P
maxwith the change curve of optical fiber collimator optical axis and plane mirror normal angle; Again adjusting plane mirror makes the mechanical axis of optical fiber collimator perpendicular to plane mirror, measures luminous power P now, rated output ratio P/P
max, in described change curve, find ratio P/P
maxcorresponding optical fiber collimator optical axis and the angle of plane mirror normal, this angle is mechanical axis and optical axis included angle.The present invention is applicable to the measurement of fiber spinning collimating apparatus mechanical axis and optical axis included angle.
Description
Technical field
The invention belongs to sensory field of optic fibre, be specifically related to the measuring method of fiber spinning collimating apparatus mechanical axis and optical axis included angle.
Background technology
Optical fiber collimator is the optical fibre device that development in recent years is got up, and its effect collimates the light of fiber exit, and reduce the angle of divergence of light beam, the light beam launched by optical fiber collimator is about 0.25 degree.When optical fiber sensing technology is applied on slewing, slewing can not be followed due to testing apparatus and rotate together, therefore need the noncontact optical transport realized between optical fiber and optical fiber.In order to reduce noncontact optical transmission loss, need to use the light of optical fiber collimator to fiber exit to collimate.An optical fiber collimator is fixed on slewing, composition fiber spinning collimating apparatus.Noncontact optical transmission loss between optical fiber collimator to optical fiber collimator depends on the size of fiber spinning collimating apparatus optical axis and mechanical axis angle, and angle is larger, and loss is larger, therefore needs the optical axis of fiber spinning collimating apparatus and mechanical axis to be adjusted to coaxial.The method of debugging optical axis coaxial with mechanical axis can use autocollimatic method usually, the method needs adjustable plane mirror to be fixed on slewing, and need by external light source by plane mirror and rotating machinery shaft Uprightness adjusting, and cannot the angle of measuring fiber rotary collimator mechanical axis and optical axis.
Summary of the invention
The present invention cannot the problem of angle of measuring optical fiber rotary collimator mechanical axis and optical axis in order to solve existing fiber collimating apparatus, proposes the measuring method of fiber spinning collimating apparatus mechanical axis based on coupling fiber and optical axis included angle.
Of the present invention based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle, the method comprises the fiber spinning collimating apparatus based on coupling fiber, and this fiber spinning collimating apparatus comprises light power meter (1), laser instrument (2), optical fiber (3), No. two optical fiber (4), photo-coupler (5), No. three optical fiber (6), mechanical rotary device (7), two groups of adjusting bolts (8) and optical fiber collimators (9);
The laser signal output terminal of described laser instrument (2) connects one end of an optical fiber (3), the other end of an optical fiber (3) connects the laser signal input end of photo-coupler (5), the laser signal input end of described light power meter (1) connects one end of No. two optical fiber (4), the other end of No. two optical fiber (4) connects a laser signal output terminal of photo-coupler (5), the laser signal input/output terminal of described photo-coupler (5) connects one end of No. three optical fiber (6), described mechanical rotary device (7) comprises bearing and rotating head (7-3), described bearing comprises fixed part (7-1) and movable part (7-2), described rotating head (7-3) is cylindrical shape, this rotating head (7-3) is positioned at bearing side vertically, and this rotating head (7-3) and coaxial bearing are arranged, one end of this rotating head (7-3) is fixedly connected with the movable part (7-2) of bearing, the barrel of described rotating head (7-3) is arranged 2 groups of adjusting bolts, often organize adjusting bolt (8) and comprise 4 adjusting bolts (8), the axis of these 4 adjusting bolts (8) is positioned at same plane and intersects at the axis of bearing, the axis angle of any two adjacent adjusting bolts (8) is 90 degree, the spiro rod length of every root adjusting bolt (8) is equal to the radius of rotating head, described optical fiber collimator (9) is embedded in rotating head, and fixed by two groups of adjusting bolts (8), optical fiber collimator (9) is coaxial with rotating head, the other end of No. three optical fiber (6) is connected with rotating head (7-3) one end with optical fiber collimator (9) through bearing,
Based on the mechanical axis of fiber spinning collimating apparatus of coupling fiber and the measuring method of the angle of optical axis, the concrete steps of the method are:
Step one, laser emitting direction at optical fiber collimator, distance optical fiber collimator L place arranges a plane mirror, wherein, and 1mm≤L≤5mm, open laser instrument (2), rotate rotating head (7-3) until detect light power meter to receive this light signal;
Step 2, regulate the position angle of plane mirror and the angle of pitch until the power of laser signal that receives of light power meter is maximum, now the optical axis of optical fiber collimator (9) is vertical with plane mirror, the maximal value P of recording optical power
max, and record α 1 and the angle of pitch β 1 of now plane mirror;
Step 3, the position angle regulating separately plane mirror to a direction or angle of pitch N time, position angle after each adjustment or the angle of pitch are the optical axis of optical fiber collimator and the angle of plane mirror normal, step-length is regulated to be 1-2 μ rad, N be more than or equal to 100 positive integer, utilize power meter (1) to measure and each regulate the luminous power P that plane mirror is corresponding
i; Calculate P
i/ P
maxvalue, draw the ratio P of light power meter (1) luminous power that receives and luminous power maximal value in conjunction with the method for numerical interpolation according to surveyed data
i/ P
maxwith the change curve of optical fiber collimator optical axis and plane mirror normal angle;
Step 4, rotating head (7-3) is revolved turnback, regulate the position angle of plane mirror and the angle of pitch until the power of laser signal that receives of light power meter (1) is maximum, now the optical axis of optical fiber collimator (9) is again vertical with plane mirror; The azimuth angle alpha 2 that record plane mirror regulates and angle of pitch β 2;
Step 5, step 4 obtain the azimuthal basis of level crossing on, the position angle regulating plane mirror is (α 1-α 2)/2, on the basis of the level crossing angle of pitch of step 4 acquisition, the angle of pitch regulating plane mirror is (β 1-β 2)/2, and now the mechanical axis of optical fiber collimator is vertical with plane mirror; Now the optical axis of optical fiber collimator is equal with the angle of plane mirror normal with optical fiber collimator optical axis with the angle of mechanical axis, records the luminous power P that now light power meter (1) records;
Luminous power P and the P that step 6, calculation procedure five light power meter (1) record
maxratio P/P
max, the luminous power that receives of light power meter (1) of drawing in step 3 and the ratio P of luminous power maximal value
i/ P
maxratio P/P is found with in the change curve of optical fiber collimator optical axis and plane mirror normal angle
maxcorresponding optical fiber collimator optical axis and the angle of plane mirror normal, this angle is mechanical axis and optical axis included angle.
The method of the invention is compared with existing autocollimatic method, without the need to additional light source, using planar catoptron coordinates with light power meter and can realize the debugging of mechanical axis and light shaft coaxle, and can realize the measurement of the angle to fine rotary collimator mechanical axis and optical axis.
Accompanying drawing explanation
Fig. 1 is the optical axis of the fiber spinning collimating apparatus based on coupling fiber described in embodiment one step 2 and the angle of plane mirror when being Φ, based on the structural representation of the fiber spinning collimating apparatus of coupling fiber;
Fig. 2 be the optical axis of the fiber spinning collimating apparatus based on coupling fiber described in embodiment one step 2 vertical with plane mirror time, based on the structural representation of the fiber spinning collimating apparatus of coupling fiber;
Fig. 3 is the ratio P of drafting light power meter received optical power described in embodiment one step 3 and luminous power maximal value
i/ P
maxwith the change curve of optical fiber collimator optical axis and plane mirror normal angle;
Fig. 4 be optical axis and the plane mirror of the fiber spinning collimating apparatus based on coupling fiber described in embodiment one step 5 again vertical time, based on the fiber spinning collimator structure schematic diagram of coupling fiber;
Fig. 5 be the mechanical axis of optical fiber collimator described in embodiment one step 6 vertical with plane mirror time, based on the structural representation of the fiber spinning collimating apparatus of coupling fiber.
Embodiment one: composition graphs 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 illustrates present embodiment, based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle described in present embodiment, the method comprises light power meter (1), laser instrument (2), optical fiber (3), No. two optical fiber (4), photo-coupler (5), No. three optical fiber (6), mechanical rotary device (7), two groups of adjusting bolts (8) and optical fiber collimators (9);
The laser signal output terminal of described laser instrument (2) connects one end of an optical fiber (3), the other end of an optical fiber (3) connects the laser signal input end of photo-coupler (5), the laser signal input end of described light power meter (1) connects one end of No. two optical fiber (4), the other end of No. two optical fiber (4) connects a laser signal output terminal of photo-coupler (5), the laser signal input/output terminal of described photo-coupler (5) connects one end of No. three optical fiber (6), described mechanical rotary device (7) comprises bearing and rotating head (7-3), described bearing comprises fixed part (7-1) and movable part (7-2), described rotating head (7-3) is cylindrical shape, this rotating head (7-3) is positioned at bearing side vertically, and this rotating head (7-3) and coaxial bearing are arranged, one end of this rotating head (7-3) is fixedly connected with the movable part (7-2) of bearing, the barrel of described rotating head (7-3) is arranged 2 groups of adjusting bolts, often organize adjusting bolt (8) and comprise 4 adjusting bolts (8), the axis of these 4 adjusting bolts (8) is positioned at same plane and intersects at the axis of bearing, the axis angle of any two adjacent adjusting bolts (8) is 90 degree, the spiro rod length of every root adjusting bolt (8) is equal to the radius of rotating head, described optical fiber collimator (9) is embedded in rotating head, and fixed by two groups of adjusting bolts (8), optical fiber collimator (9) is coaxial with rotating head, the other end of No. three optical fiber (6) is connected with rotating head (7-3) one end with optical fiber collimator (9) through bearing,
Based on the mechanical axis of fiber spinning collimating apparatus of coupling fiber and the measuring method of the angle of optical axis, the concrete steps of the method are:
Step one, laser emitting direction at optical fiber collimator, distance optical fiber collimator L place arranges a plane mirror, wherein, and 1mm≤L≤5mm, open laser instrument (2), rotate rotating head (7-3) until detect light power meter to receive this light signal;
Step 2, regulate the position angle of plane mirror and the angle of pitch until the power of laser signal that receives of light power meter is maximum, now the optical axis of optical fiber collimator (9) is vertical with plane mirror, the maximal value P of recording optical power
max, and record α 1 and the angle of pitch β 1 of now plane mirror;
Step 3, the position angle regulating separately plane mirror or angle of pitch N time, position angle after each adjustment or the angle of pitch are the optical axis of optical fiber collimator and the angle of plane mirror normal, step-length is regulated to be 1-2 μ radM μ rad, N be more than or equal to 100 positive integer, utilize power meter (1) to measure and each regulate the luminous power P that plane mirror is corresponding
i; Calculate P
i/ P
maxvalue, draw the ratio P of light power meter (1) luminous power that receives and luminous power maximal value in conjunction with the method for numerical interpolation according to surveyed data
i/ P
maxwith the change curve of optical fiber collimator optical axis and plane mirror normal angle;
Step 4, rotating head (7-3) is revolved turnback, regulate the position angle of plane mirror and the angle of pitch until the power of laser signal that receives of light power meter (1) is maximum, now the optical axis of optical fiber collimator (9) is again vertical with plane mirror; The azimuth angle alpha 2 that record plane mirror regulates and angle of pitch β 2;
Step 5, step 4 obtain the azimuthal basis of level crossing on, the position angle regulating plane mirror is (α 1-α 2)/2, on the basis of the level crossing angle of pitch of step 4 acquisition, the angle of pitch regulating plane mirror is (β 1-β 2)/2, and now the mechanical axis of optical fiber collimator is vertical with plane mirror; Now the optical axis of optical fiber collimator is equal with the angle of plane mirror normal with optical fiber collimator optical axis with the angle of mechanical axis, records the luminous power P that now light power meter (1) records;
Luminous power P and the P that step 6, calculation procedure five light power meter (1) record
maxratio P/P
max, the luminous power that receives of light power meter (1) of drawing in step 3 and the ratio P of luminous power maximal value
i/ P
maxratio P/P is found with in the change curve of optical fiber collimator optical axis and plane mirror normal angle
maxcorresponding optical fiber collimator optical axis and the angle of plane mirror normal, this angle is mechanical axis and optical axis included angle.
Embodiment two: present embodiment be to described in embodiment one based on the mechanical axis of fiber spinning collimating apparatus of coupling fiber and the measuring method of the angle of optical axis, the L=3mm described in step one.
Embodiment three: present embodiment be to described in embodiment one based on the mechanical axis of fiber spinning collimating apparatus of coupling fiber and the measuring method of the angle of optical axis, the value of the N described in step 3 is 100.
Claims (3)
1. based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle, the method comprises the fiber spinning collimating apparatus based on coupling fiber, and this fiber spinning collimating apparatus comprises light power meter (1), laser instrument (2), optical fiber (3), No. two optical fiber (4), photo-coupler (5), No. three optical fiber (6), mechanical rotary device (7), two groups of adjusting bolts (8) and optical fiber collimators (9);
The laser signal output terminal of described laser instrument (2) connects one end of an optical fiber (3), the other end of an optical fiber (3) connects the laser signal input end of photo-coupler (5), the laser signal input end of described light power meter (1) connects one end of No. two optical fiber (4), the other end of No. two optical fiber (4) connects a laser signal output terminal of photo-coupler (5), another laser signal output terminal of described photo-coupler (5) connects one end of No. three optical fiber (6), described mechanical rotary device (7) comprises bearing and rotating head (7-3), described bearing comprises fixed part (7-1) and movable part (7-2), described rotating head (7-3) is cylindrical shape, this rotating head (7-3) is positioned at bearing side vertically, and this rotating head (7-3) and coaxial bearing are arranged, one end of this rotating head (7-3) is fixedly connected with the movable part (7-2) of bearing, the barrel of described rotating head (7-3) is arranged 2 groups of adjusting bolts, often organize adjusting bolt (8) and comprise 4 adjusting bolts (8), the axis of these 4 adjusting bolts (8) is positioned at same plane and intersects at the axis of bearing, the axis angle of any two adjacent adjusting bolts (8) is 90 degree, the spiro rod length of every root adjusting bolt (8) is equal to the radius of rotating head, described optical fiber collimator (9) is embedded in rotating head, and fixed by two groups of adjusting bolts (8), optical fiber collimator (9) is coaxial with rotating head, the other end of No. three optical fiber (6) is connected with rotating head (7-3) one end with optical fiber collimator (9) through bearing,
It is characterized in that, based on the mechanical axis of fiber spinning collimating apparatus of coupling fiber and the measuring method of the angle of optical axis, the concrete steps of the method are:
Step one, laser emitting direction at optical fiber collimator, distance optical fiber collimator L place arranges a plane mirror, and wherein, 1mm≤L≤5mm, opens laser instrument (2), rotates rotating head (7-3) until detect light power meter to receive this light signal;
Step 2, regulate the position angle of plane mirror and the angle of pitch until the power of laser signal that receives of light power meter is maximum, now the optical axis of optical fiber collimator (9) is vertical with plane mirror, the maximal value of recording optical power
, and record azimuth angle alpha 1 and the angle of pitch β 1 of now plane mirror;
Step 3, the position angle regulating separately plane mirror or angle of pitch N time, position angle after each adjustment or the angle of pitch are the optical axis of optical fiber collimator and the angle Φ of plane mirror normal, step-length is regulated to be 1-2 μ rad, N be more than or equal to 100 positive integer, utilize power meter (1) to measure and each regulate the luminous power that plane mirror is corresponding
; Calculate
/
value, draw the ratio of light power meter (1) luminous power that receives and luminous power maximal value in conjunction with the method for numerical interpolation according to surveyed data
/
with the change curve of optical fiber collimator optical axis and plane mirror normal angle;
Step 4, rotating head (7-3) is revolved turnback, regulate the position angle of plane mirror and the angle of pitch until the power of laser signal that receives of light power meter (1) is maximum, now the optical axis of optical fiber collimator (9) is again vertical with plane mirror; The azimuth angle alpha 2 that record plane mirror regulates and angle of pitch β 2;
Step 5, step 4 obtain the azimuthal basis of level crossing on, the position angle regulating plane mirror is (α 1-α 2)/2, on the basis of the level crossing angle of pitch of step 4 acquisition, the angle of pitch regulating plane mirror is (β 1-β 2)/2, and now the mechanical axis of optical fiber collimator is vertical with plane mirror; Now the optical axis of optical fiber collimator is equal with the angle of plane mirror normal with optical fiber collimator optical axis with the angle of mechanical axis, records the luminous power P that now light power meter (1) records;
The luminous power P that step 6, calculation procedure five light power meter (1) record with
ratio P/
, the luminous power that receives of light power meter (1) of drawing in step 3 and the ratio P of luminous power maximal value
i/ P
maxratio P/P is found with in the change curve of optical fiber collimator optical axis and plane mirror normal angle
maxcorresponding optical fiber collimator optical axis and the angle of plane mirror normal, this angle is mechanical axis and optical axis included angle.
2. according to claim 1ly to it is characterized in that based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle, in step one, L=3mm.
3. according to claim 1ly it is characterized in that based on the fiber spinning collimating apparatus mechanical axis of coupling fiber and the measuring method of optical axis included angle, in step 3, the value of N is 100.
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| CN108802841B (en) * | 2018-06-20 | 2020-02-07 | 中国计量科学研究院 | Light path adjusting device and method and gravity meter |
| CN112230342A (en) * | 2020-11-06 | 2021-01-15 | 飞秒光电科技(西安)有限公司 | High return loss coaxial collimator and assembling process thereof |
| CN116990982B (en) * | 2023-09-26 | 2023-12-15 | 中国科学院长春光学精密机械与物理研究所 | Space optical transmission device for laser communication and adjustment method |
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| US5659645A (en) * | 1994-05-13 | 1997-08-19 | Mitsubishi Cable Industries, Ltd. | Collimator with adjusting mechanism for improved alignment between optical fiber and lens |
| US6263133B1 (en) * | 1999-03-29 | 2001-07-17 | Scimed Life Systems, Inc. | Optical focusing, collimating and coupling systems for use with single mode optical fiber |
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| JP4911519B2 (en) * | 2007-08-09 | 2012-04-04 | Ｆｄｋ株式会社 | Reflective variable optical attenuator |
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|---|---|---|---|---|
| US5659645A (en) * | 1994-05-13 | 1997-08-19 | Mitsubishi Cable Industries, Ltd. | Collimator with adjusting mechanism for improved alignment between optical fiber and lens |
| US6263133B1 (en) * | 1999-03-29 | 2001-07-17 | Scimed Life Systems, Inc. | Optical focusing, collimating and coupling systems for use with single mode optical fiber |
| CN1434340A (en) * | 2002-01-25 | 2003-08-06 | 台达电子工业股份有限公司 | Optical fibre collimator and making method thereof |
| CN101078615A (en) * | 2007-06-22 | 2007-11-28 | 哈尔滨工业大学 | Precision determination method for angle between optical axis and mechanical axis of optical system |
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