CN102749186A - Method for automatically measuring focal length of laser - Google Patents
Method for automatically measuring focal length of laser Download PDFInfo
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- CN102749186A CN102749186A CN2012102411381A CN201210241138A CN102749186A CN 102749186 A CN102749186 A CN 102749186A CN 2012102411381 A CN2012102411381 A CN 2012102411381A CN 201210241138 A CN201210241138 A CN 201210241138A CN 102749186 A CN102749186 A CN 102749186A
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Abstract
The invention discloses a method for automatically measuring the focal length of a laser. The method adopts a laser detector to automatically detect a normalized coupling efficiency value so as to obtain the focal length of the laser, thereby realizing the focus detection automation.
Description
Technical field
The present invention relates to optical communication field, particularly a kind of method of automatic Laser Measurement device focal length.
Background technology
Optical fiber communication has high bandwidth, long distance, the characteristics of safe transmission; The link different continents have been widely used, backbone network in the country, Metropolitan Area Network (MAN) in the city; Up to Access Network, Fiber to the home, and the application of optical fiber communication has been deep into the various aspects that we work and live.
Optical fiber communication is to be laser signal through laser instrument with the electrical information conversion of signals, is coupled to transmit in the optical fiber again.The light beam coupling of laser instrument in optical fiber, is mainly realized that with manual shift this is because the focus of the laser that laser instrument sends has certain discrete type now; Generally be distributed in the hundreds of micrometer range, earlier laser coupled to be gone into optical fiber, each laser all will carry out x in the rectangular coordinate system; Y; Z, the adjusting of three directions could make the light beam of laser instrument be coupled in the optical fiber to greatest extent and propagate.Because fiber cores has only 9 microns, be accurately so far forth, so the process of coupling wastes time and energy.The coupling of the optical fiber of most of laser all is to rely on manually-operated to realize that efficiency is low in the world now, and the consistance of quality also is difficult to control.
Therefore, need a kind of new technical scheme to address the above problem.
Summary of the invention
To above-mentioned existing in prior technology problem and shortage, the purpose of this invention is to provide a kind of method of the focal length of Laser Measurement device automatically.
For realizing above-mentioned purpose, the method for the automatic Laser Measurement device of the present invention focal length can adopt following technical scheme:
A kind of method of automatic Laser Measurement device focal length; Stationary installation and mobile device are provided; With laser instrument and laser detector be individually fixed in make on stationary installation and the mobile device the relative laser instrument of laser detector near or away from; Laser detector along straight line near or during away from laser instrument; The normalization coupling efficiency value that laser detector detects changes, and the normalization coupling efficiency value that detects when promptly departing from the laser instrument focus descends, and is maximum in the normalization coupling efficiency value that along is surveyed; Laser detector obtains the normalization coupling efficiency value curve of symmetry gradually away from laser instrument, normalization coupling efficiency value curve that certainly should symmetry obtains the focal length that symmetric points are laser instrument.
Preferably, establish said laser detector along straight line near or be the Z axle in the rectangular coordinate system away from the direction of laser instrument, obtain the focal length of laser instrument after, be adjusted at the coordinate of this focal length X axle and Y axle in rectangular coordinate system and obtain laser instrument Coupling point accurately.
Preferably, said laser instrument is fixed on the stationary installation, and laser detector is fixed on the mobile device.Otherwise, also can being fixed on the stationary installation by said laser detector, laser instrument is fixed on the mobile device.
Preferably, laser detector with near laser focus, through laser focus, do motion away from the straight line of laser focus away from laser instrument.
Preferably, the laser instrument that uses two known focal lengths reduces the error that each measurement is produced as calibration.Correcting laser preferably is positioned at the outside of measured laser device, the calibration best results.
Preferably, once can measure many laser instruments.
Preferably, every survey curve and two kinds of correcting lasers when this measure with known curve ratio, carry out data fitting, obtain the accurate focal length value of measured laser device
The present invention is compared with prior art: adopt laser detector to survey normalization coupling efficiency value automatically and obtain the focal length of laser instrument, realize that focal length surveys robotization.
Description of drawings
Fig. 1 is the structural drawing of measurement mechanism in the method for the automatic Laser Measurement device of the present invention focal length.
The normalization coupling efficiency value curve map of Fig. 2 for obtaining in the method for the automatic Laser Measurement device of the present invention focal length.
Embodiment
Below in conjunction with accompanying drawing and embodiment; Further illustrate the present invention; Should understand following embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Please combine shown in Figure 1; The present invention discloses a kind of method of automatic Laser Measurement device focal length; The implementation of this method is: stationary installation 20 and mobile device 30 are provided, with laser instrument 1 and laser detector (not shown) be individually fixed in make on stationary installation 20 and the mobile device 30 the relative laser instrument 1 of laser detector near or away from.In this embodiment; Be that laser instrument 1 is fixed on the stationary installation 20; And laser detector 2 is fixed on the mobile device 30; Also can be in other modes, laser instrument 1 is fixed on the mobile device 30 and laser detector is fixed on the stationary installation 20, can reach equally make the relative laser instrument 1 of laser detector near or away from effect.In this embodiment, but mobile device 30 comprises the Mobile Slide 31 that straight line moves and is fixed in the laser detector bracing frame 32 on the Mobile Slide 31.Please combine shown in Figure 2; Laser detector 2 along straight line near or during away from laser instrument 1; The normalization coupling efficiency value that laser detector detects changes; The normalization coupling efficiency value that detects when promptly departing from the focus of laser instrument 1 descends, and is maximum in the normalization coupling efficiency value that along is surveyed, and laser detector obtains the normalization coupling efficiency value curve of symmetry gradually away from laser instrument 1; Obtain the focal length that symmetric points are laser instrument 1 from this symmetrical normalization coupling efficiency value curve, thereby can access the focal length of laser instrument 1.In the method, laser detector with near laser focus, through laser focus, do motion away from the straight line of laser focus away from laser instrument, thereby the normalization coupling efficiency value that obtains is the para-curve of a symmetry.Here, establish said laser detector along straight line near or be the Z axle in the rectangular coordinate system away from the direction of laser instrument, obtain the focal length of laser instrument after, be adjusted at the coordinate of this focal length X axle and Y axle in rectangular coordinate system and obtain laser instrument Coupling point accurately.
In this embodiment; Can be through in using 10 microns stepping accuracy slide block as mobile device; 100 microns laser detector is realized the design and the machining precision that can realize easily on the machining reaching laser focal measurement result preferably through computed in software.
In this embodiment, laser detector be chosen as 50 microns laser detectors to 1000 micron diameter photosurfaces, also can use multimode optical fiber as coupling probe, light transmission is come out, carry out the photodetection conversion again.
Because the error of Machine Design, and the error of use location repeatedly, perhaps move and depart from the error that the error brought etc. all can cause the focal length measurement result; Be placed with canonical reference respectively at laser instrument and detector two ends among the present invention, the laser instrument of known focal length can be one; Perhaps several; In each the measurement, gather their detective curve simultaneously, in calculating, compare, proofread and correct with known typical curve.Like this can be so that the focal length value of measured laser device is measured more accurate.
Claims (7)
1. the method for an automatic Laser Measurement device focal length; It is characterized in that: stationary installation and mobile device are provided; With laser instrument and laser detector be individually fixed in make on stationary installation and the mobile device the relative laser instrument of laser detector near or away from; Laser detector along straight line near or during away from laser instrument; The normalization coupling efficiency value that laser detector detects changes, and the normalization coupling efficiency value that detects when promptly departing from the laser instrument focus descends, and is maximum in the normalization coupling efficiency value that along is surveyed; Laser detector obtains the normalization coupling efficiency value curve of symmetry gradually away from laser instrument, normalization coupling efficiency value curve that certainly should symmetry obtains the focal length that symmetric points are laser instrument.
2. the method for an automatic Laser Measurement device focal length as claimed in claim 1; It is characterized in that: establish said laser detector along straight line near or be the Z axle in the rectangular coordinate system away from the direction of laser instrument; After obtaining the focal length of laser instrument, be adjusted at the coordinate of this focal length X axle and Y axle in rectangular coordinate system and obtain laser instrument Coupling point accurately.
3. the method for an automatic Laser Measurement device focal length according to claim 1 or claim 2, it is characterized in that: said laser instrument is fixed on the stationary installation, and laser detector is fixed on the mobile device; Otherwise, also can being fixed on the stationary installation by said laser detector, laser instrument is fixed on the mobile device.
4. the method for an automatic Laser Measurement device focal length according to claim 1 or claim 2 is characterized in that: laser detector is with near laser focus, through laser focus, do the motion away from laser instrument away from the straight line of laser focus.
5. the method for an automatic Laser Measurement device focal length according to claim 1 or claim 2 is characterized in that: the laser instrument that uses two known focal lengths reduces the error that each measurement is produced as calibration; Correcting laser preferably is positioned at the outside of measured laser device, the calibration best results.
6. the method for an automatic Laser Measurement device focal length according to claim 1 or claim 2 is characterized in that: once can measure many laser instruments.
7. the method for an automatic Laser Measurement device focal length according to claim 1 or claim 2 is characterized in that: every survey curve and two kinds of correcting lasers when this measure with known curve ratio, carry out data fitting, obtain the accurate focal length value of measured laser device.
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| CN2012102411381A CN102749186A (en) | 2012-07-12 | 2012-07-12 | Method for automatically measuring focal length of laser |
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| CN2012102411381A CN102749186A (en) | 2012-07-12 | 2012-07-12 | Method for automatically measuring focal length of laser |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964810A (en) * | 2015-06-16 | 2015-10-07 | 苏州佳世达光电有限公司 | Light source detection system and method |
| CN106353071A (en) * | 2016-08-18 | 2017-01-25 | 宁波舜宇智能科技有限公司 | The device used to adjust laser and this device adjustment and the method to adjust laser with this device |
| CN106444267A (en) * | 2016-10-08 | 2017-02-22 | 深圳市金立通信设备有限公司 | Laser focusing test device |
| CN107389313A (en) * | 2017-07-14 | 2017-11-24 | 重庆航伟光电科技有限公司 | Laser focus Auto-Test System |
| CN109580189A (en) * | 2019-01-22 | 2019-04-05 | 中国科学院福建物质结构研究所 | Automatic focal length measuring equipment and its measurement method for laser diode |
| CN112345210A (en) * | 2020-10-30 | 2021-02-09 | 中国科学院长春光学精密机械与物理研究所 | Method for detecting focal length of laser |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290264A (en) * | 2008-04-25 | 2008-10-22 | 北京星光影视设备科技股份有限公司 | Lens laser focus-measuring device |
| CN102360105A (en) * | 2011-10-28 | 2012-02-22 | 江苏奥雷光电有限公司 | Method for improving coupling stability of optical active device |
-
2012
- 2012-07-12 CN CN2012102411381A patent/CN102749186A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290264A (en) * | 2008-04-25 | 2008-10-22 | 北京星光影视设备科技股份有限公司 | Lens laser focus-measuring device |
| CN102360105A (en) * | 2011-10-28 | 2012-02-22 | 江苏奥雷光电有限公司 | Method for improving coupling stability of optical active device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964810A (en) * | 2015-06-16 | 2015-10-07 | 苏州佳世达光电有限公司 | Light source detection system and method |
| CN104964810B (en) * | 2015-06-16 | 2017-07-25 | 苏州佳世达光电有限公司 | light source detecting system and method |
| CN106353071A (en) * | 2016-08-18 | 2017-01-25 | 宁波舜宇智能科技有限公司 | The device used to adjust laser and this device adjustment and the method to adjust laser with this device |
| CN106353071B (en) * | 2016-08-18 | 2019-09-17 | 宁波舜宇智能科技有限公司 | Method for adjusting the device of laser and adjusting the device and adjust laser using the device |
| CN106444267A (en) * | 2016-10-08 | 2017-02-22 | 深圳市金立通信设备有限公司 | Laser focusing test device |
| CN106444267B (en) * | 2016-10-08 | 2019-05-14 | 深圳市金立通信设备有限公司 | A kind of laser focusing test device |
| CN107389313A (en) * | 2017-07-14 | 2017-11-24 | 重庆航伟光电科技有限公司 | Laser focus Auto-Test System |
| CN107389313B (en) * | 2017-07-14 | 2019-02-22 | 重庆航伟光电科技有限公司 | Laser focus Auto-Test System |
| CN109580189A (en) * | 2019-01-22 | 2019-04-05 | 中国科学院福建物质结构研究所 | Automatic focal length measuring equipment and its measurement method for laser diode |
| CN112345210A (en) * | 2020-10-30 | 2021-02-09 | 中国科学院长春光学精密机械与物理研究所 | Method for detecting focal length of laser |
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Application publication date: 20121024 |