CN107167812A - A kind of optical telemetry system of autocollimation - Google Patents
A kind of optical telemetry system of autocollimation Download PDFInfo
- Publication number
- CN107167812A CN107167812A CN201710520837.2A CN201710520837A CN107167812A CN 107167812 A CN107167812 A CN 107167812A CN 201710520837 A CN201710520837 A CN 201710520837A CN 107167812 A CN107167812 A CN 107167812A
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- lens
- voltage
- laser
- beam splitter
- telemetry system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention belongs to optical telemetry technical field, more particularly to a kind of optical telemetry system, including the collimation lens and echo collection system in front of measurement laser, voltage-controlled zoom lens are coaxially arranged with front of the collimation lens, with being provided with beam splitter in front of voltage-controlled zoom lens coaxial direction, aiming laser device is provided with below beam splitter, reference gas chamber and reference detector are provided with above beam splitter, the visible laser part that aiming laser device is sent enters reference gas chamber and reference detector after being transmitted through beam splitter, the visible laser part that aiming laser device is sent is overlapped after being reflected through beam splitter with the measurement laser of the transmission beam splitter of measurement laser, output window is located in front of beam splitter.
Description
Technical field
The invention belongs to optical telemetry technical field, more particularly to a kind of optical telemetry system.
Background technology
Optical telemetry technology based on laser is generally used for ranging, positioning.Due to passing through propagated, echo-signal carries frequency
The abundant information such as rate, phase, amplitude, by advanced Weak Signal Processing technology, can obtain the information on propagation path,
And then realize the purpose of remote sensing remote measurement.Such as absorption of the medium ingredients to some wave band in path, modulated optical absorption spectra can be passed through
The concentration of this kind of medium of technology inverting, so as to realize remote measurement.Again such as, certain vibration source on path enters to light wave CF signal
Passive modulation is gone, the information of vibration source can be recovered by demodulation, so as to realize the carry out sound wave spy broken through to vibration source
The distance of survey and region limitation, realize the distance based on optical detection and the expansion in region.
In order to realize highly sensitive detection, it is necessary to improve the collection efficiency and intensity of echo light.So, optical telemetry system
Outgoing beam be required for being collimated, with ensure ranging, positioning accuracy.At present, the laser beam that in the market is used
Alignment method, can be summarized as simple lens method, compound lens method, gradual index lenses method, liquid lens method, bounce technique and diffraction
Method etc..Simple lens method collimating effect is poor in the above method, gradual index lenses method, liquid lens method, bounce technique and diffraction approach
Structure is again excessively complicated, and only compound lens method can both ensure the collimating effect of certain precision at present, while avoiding excessively multiple
Miscellaneous structure.
Notification number 202748542, it is entitled《A kind of collimated system of semiconductor laser collimation》One in
State's utility model patent discloses a kind of collimated system of semiconductor laser collimation, coaxial and set in the same direction using two panels
The meniscus lens put, can improve capacity usage ratio height, reduction aberration, and the angle of divergence is smaller, belongs to the one of compound lens method
Kind, but this method lacks environmental suitability, the especially reflection in face of different structure and distance in actual use at present
, it is necessary to adjust position and the spacing of lens manually during target, its stability is poor, short life, it is impossible to convenient regulation as needed
Hot spot at target.
The content of the invention
There is provided a kind of optical telemetry system of autocollimation in order to make up the deficiencies in the prior art by the present invention.
In order to achieve the above object, the technical solution adopted by the present invention is：A kind of optical telemetry system of autocollimation, bag
The collimation lens and echo collection system in front of measurement laser are included, is coaxially arranged with front of the collimation lens voltage-controlled
Zoom lens, are provided with aiming laser device, beam splitter with being provided with front of voltage-controlled zoom lens coaxial direction below beam splitter, beam splitter
Top is provided with reference gas chamber and reference detector, and the measurement laser part that measurement laser is sent enters after being reflected through beam splitter
Reference gas chamber and reference detector, visible laser that aiming laser device an is sent part reflected through beam splitter after with measurement laser
Transmission beam splitter measurement laser overlap, output window be located at beam splitter in front of.
Preferably：
The measurement laser, collimation lens and voltage-controlled zoom lens are fixed in a sleeve.
The distance of the measurement laser and collimation lens is more than the focal length of collimation lens.
The voltage-controlled zoom lens are filled with polymer point in voltage-controlled liquid zoom lens, voltage-controlled liquid zoom lens
Dispersion liquid is brilliant.
The exit direction of the beam splitter and measurement laser is in 45° angle.
The collimation lens is non-spherical lens.
The focal-distance tuning range of the voltage-controlled zoom lens is 50-120mm.
When the focal-distance tuning range of above-mentioned voltage-controlled zoom lens is between 50-120mm, the collimation lens with it is voltage-controlled
The spacing of zoom lens is preferably 100-240mm, more preferred, the spacing of collimation lens and voltage-controlled zoom lens is 115mm.
The echo collection system includes receiving lens, light cone shape device, optical filter and signal sensor, wherein receiving lens
For Large Aperture Lenses, more preferred, the Large Aperture Lenses are infrared Fresnel Lenses.
Beneficial effects of the present invention are：
（1）Collimating structure is simple, and only two panels lens are constituted, and compared with the mechanical compound lens adjusted manually, stability is good, the longevity
Life length；
（2）Automation regulation, controls voltage-controlled zoom lens focus adjustment to collimate, quick and precisely using electric signal；
（3）Lens are voltage-controlled variable focus lens, and focal length variations make the spot size after collimation processing adjustable, for different distance,
Different detection faces, it is most strong to be quickly and easily adjusted to the optical signal that suitable hot spot receives signal sensor,
Blind area is reduced, increases detection range, realizes multi-environment, long-range detection.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
In figure：1 measurement laser, 2 collimation lenses, 3 echo collection systems, 31 receiving lens, 32 light cone shape devices, 33 filter
Piece, 34 signal sensors, 4 voltage-controlled zoom lens, 5 sleeves, 6 beam splitters, 7 aiming laser devices, 8 reference gas chambers, 9 with reference to detection
Device, 10 output windows, 11 aided detection targets.
Embodiment
Below, the present invention is specifically described by exemplary embodiment.It should be appreciated, however, that not entering one
In the case of step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiment
In.
In the description of the invention, it is necessary to explanation, the instruction such as term " interior ", " outer ", " on ", " under ", "front", "rear"
Orientation or position relationship be based on position relationship shown in the drawings, be for only for ease of description the present invention and simplify description, and
It is not instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore
It is not considered as limiting the invention.The element can independent or multiple element be integrally assembled.
The optical telemetry system of the autocollimation of the present embodiment includes measurement laser 1, is put in the front of measurement laser 1
Collimation lens 2 is equipped with, to realize making full use of for luminous energy, and the collimation that measurement laser 1 sends light beam, the present embodiment is taken into account
It is preferred that the distance of measurement laser 1 and collimation lens 2 is slightly larger than one times of focal length of collimation lens 2, to reduce ray aberration, it is accurate
Straight lens 2 are preferably non-spherical lens.Voltage-controlled zoom lens 4 are coaxially arranged with the front of collimation lens 2, here voltage-controlled zoom
Lens 4 refer to the lens that focal length is controlled to adjust by voltage, and this kind of voltage-controlled zoom lens 4 belong to existing device, are mainly used in
The imaging system of camera, realizes the imaging of different depths of focus or the depth of field, is all the receiving terminal for concentrating on optical signal, for voltage-controlled zoom
Voltage control principle and circuit of lens 4 etc. are repeated no more here, belong to prior art.It is preferred that, the voltage-controlled change of the present embodiment
Focus lens 4 are voltage-controlled liquid zoom lens, and this voltage-controlled liquid zoom lens is interior filled with PDLC, and this
The focal-distance tuning range of the voltage-controlled zoom lens 4 of embodiment is between 50-120mm, and regulation voltage can complete focal length in 20ms
Change regulation.According to the symmetry principle of light, minimum light of the laser sent when measurement laser 1 after collimation lens 2
When spot is located at voltage-controlled 4 focal point of zoom lens, good collimating effect, collimation lens 2 and voltage-controlled zoom lens 4 can be obtained
The two focus length that distance is set to voltage-controlled zoom lens 4 is optimal, voltage-controlled zoom lens 4 focal-distance tuning range in 50-120mm
Between when, the spacing of collimation lens 2 and voltage-controlled zoom lens 4 is preferably 100-240mm, and by lot of experiments, the present embodiment is more
Plus preferably, the spacing of collimation lens 2 and voltage-controlled zoom lens 4 is optimal for 115mm, can take into account collimation and optical efficiency.
Although adjustment the distance between collimation lens 2 and voltage-controlled zoom lens 4 are conducive to the collimation of shoot laser, consider
To the mechanical stability of optical instrument, between two lens, distance, which arbitrarily changes, can make it that whole telemetry system stability is poor, the life-span
It is short, it is infeasible in practice, therefore be the stability for the system that further enhances, it is described as the preferred scheme of the present embodiment
Measurement laser 1, collimation lens 2 and voltage-controlled zoom lens 4 are fixed in a sleeve 5.
It is wherein above-mentioned：
Measure laser 1：For producing measurement laser；
Collimation lens 2：For the measurement laser of generation tentatively to be collimated；
Voltage-controlled zoom lens 4：For further the measurement laser of generation to be collimated；
Sleeve 5：For fixation measuring laser 1, collimation lens 2 and voltage-controlled zoom lens 4.
Above-mentioned measurement laser 1, collimation lens 2, voltage-controlled zoom lens 4 and sleeve 5 have collectively constituted oneself of the present embodiment
Dynamic colimated light system.
Beam splitter 6 is additionally provided with front of the voltage-controlled coaxial direction of zoom lens 4, beam splitter 6 is semi-transparent semi-reflecting lens, Ke Yiman
The beam splitting of the bigger two-beam of sufficient wavelength difference and conjunction beam, beam splitter 6 is preferably beam splitting dichroic mirror 6.Below beam splitter 6 also
Provided with aiming laser device 7, the top of beam splitter 6 is provided with reference gas chamber 8 and reference detector 9, the part that measurement laser 1 is sent
Light enters reference gas chamber 8 and reference detector 9 after being reflected through beam splitter 6, the visible laser part warp that aiming laser device 7 is sent
The part measurement laser of transmission beam splitter 6 after the reflection of beam splitter 6 with measuring laser 1 is overlapped, and output window 10, which is located at, to be divided
The front of beam mirror 6.The present embodiment is so that the exit direction of beam splitter 6 and measurement laser 1 is in 45° angle as an example, as shown in Figure 1, but
Not limited to this, the exit direction angle of beam splitter 6 and measurement laser 1 is any, as long as meeting above-mentioned condition.
It is wherein above-mentioned：
Beam splitter 6：For being split and closing beam by the laser for measuring laser 1 and the outgoing of aiming laser device 7；
Aiming laser device 7：Send aiming laser；
Reference gas chamber 8：For providing the status checkout of laser and providing feedback information for drive control；
Reference detector 9：For ensureing that the measurement normal work of laser 1, there is provided reference signal, calculates result more accurate.
Because the laser of most of measurement outgoing of laser 1 are non-visible light, therefore for convenience of visually seeing measurement laser
Whether beat in the suitable measuring surface of aided detection target 11, whether the angle reflected suitable etc., there is provided aiming laser
Device 7, the visible laser that aiming laser device 7 is sent is divided into two beams by beam splitter 6, along former direction after a branch of transmission through beam splitter 6
Propagate, and converge conjunction beam with the part reflected through beam splitter 6 the measurement laser of measurement laser 1, close and enter top ginseng after beam
Air chamber 8 and reference detector 9 are examined, the part measurement laser into reference gas chamber 8 and reference detector 9 swashs for providing measurement
The status checkout of light device 1 and provide feedback information for drive control, whether is display measurement laser 1 normal work；Another Shu Ze
The part measurement laser of transmission beam splitter 6 after being reflected through beam splitter 6 with measuring laser 1 is overlapped, and is realized to invisible
The tracking of laser is measured, facilitates human eye to judge the situation that measurement laser is beaten in aided detection target 11.Need exist for explanation
It is that aided detection target 11 is not the target of detection, but auxiliary is realized from telemetry system to aided detection target 11
Whole path on optical signalling and the detection as the gas content information entrained by it, it and non-invention telemetry system
This body structure, is occurred in the accompanying drawings for the function of explanation telemetry system of the present invention.
Echo collection system 3 includes receiving lens 31, light cone shape device 32, optical filter 33 and signal sensor 34, wherein connecing
Receiving lens 31 is used to receive the light of the reflection of aided detection target 11 and enters line convergence to this light, and the light through overconvergence is got to
On the signal sensor 34 of the back of receiving lens 31, light ray energy and spectral information are obtained；Optical filter 33 is used for wiping out background light；
Optical taper type device, which is used to converge, collects the ripple signal that aided detection target 11 is reflected；Signal sensor 34, which is used to receive to measure, to swash
Light device 1 sends and passed through the light that the process aided detection target 11 of specific light path is reflected back, and above-mentioned device is laser telemetry system
Echo collection system 3 often uses device in system, to be said here be the present invention to the existing improvements introduced of echo collection system 3 it
Place, is theed improvement is that：The reception that act as of receiving lens 31 measures the light that the reflected face of laser 1 is reflected, therefore
The size of receiving lens 31, which have impact on, can receive how much light, it is necessary to set suitable receiving lens 31 to complete light
Recovery, it is contemplated that actual conditions and instrument requirements, receiving lens 31 are preferably Large Aperture Lenses, and Large Aperture Lenses are anti-to receive
The lens of light are penetrated, play a part of converging light, the measurement laser sent reflects by aided detection target 11 and then by big
Bore lens are converged, then receive the light after convergence by signal sensor 34.In order to reduce volume and weight, the present embodiment is more
It is preferred that the infrared Fresnel Lenses of use be used as Large Aperture Lenses.
The present invention is to realize the autocollimation of light, and from voltage-controlled zoom lens 4, focal length can realize change in 50-120mm
Jiao, when measuring the testee of different distance, can adjust the focal length of voltage-controlled zoom lens 4, the collimating effect of light is more closed
It is suitable, the focal length of voltage-controlled zoom lens 4 is adjusted, makes the reflected light that receiving lens 31 are received at most, signal sensor 34 is received
Optical signal it is most strong, it is ensured that the light after being collimated in suitable distance range can reach use requirement, and make light
Utilization ratio reaches highest.
The optical telemetry system of the autocollimation of the present embodiment, for uniform planar aided detection target 11, when auxiliary is visited
When surveying target 11 close to vertical optical axis, light incoming position is first determined, incident angle is finely tuned, according to reflecting surface and colimated light system
The distance of position, adjusts the focal length of voltage-controlled zoom lens 4, the spot size of receiving terminal is received thoroughly apart from upper all matchings any
The aperture of mirror 31, reaches optimal collection efficiency.
For the irregular reflection interface of aided detection target 11, the reflectivity of aided detection target 11 is not single value, and
It is a curved surface distribution function.According to different targets, it is first determined incident distance, incident light is then finely tuned by aiming laser
Position of the spot in aided detection target 11, while according to the signal output of signal sensor 34 as feedback, determining voltage-controlled change
The pinpointed focus of focus lens 4, control light spot received size makes optical efficiency reach maximum, improves collection efficiency.
One kind of embodiment described above, simply more preferably embodiment of the invention, those skilled in the art
The usual variations and alternatives that member is carried out in the range of technical solution of the present invention all should be comprising within the scope of the present invention.
Claims (10)
1. a kind of optical telemetry system of autocollimation, including positioned at measurement laser（1）The collimation lens in front（2）And echo
Collection system（3）, it is characterised in that：The collimation lens（2）Front be coaxially arranged with voltage-controlled zoom lens（4）, it is and voltage-controlled
Zoom lens（4）Beam splitter is provided with front of coaxial direction（6）, beam splitter（6）Lower section is provided with aiming laser device（7）, beam splitter（6）
Top is provided with reference gas chamber（8）And reference detector（9）, measure laser（1）The measurement laser part sent is through beam splitter
（6）Enter reference gas chamber after reflection（8）And reference detector（9）, aiming laser device（7）The visible laser part sent is through dividing
Shu Jing（6）With measurement laser after reflection（1）Transmission beam splitter（6）Measurement laser overlap, output window（10）Positioned at point
Shu Jing（6）Front.
2. the optical telemetry system of autocollimation according to claim 1, it is characterised in that：The measurement laser（1）、
Collimation lens（2）With voltage-controlled zoom lens（4）It is fixed on a sleeve（5）It is interior.
3. the optical telemetry system of autocollimation according to claim 1, it is characterised in that：The measurement laser（1）
With collimation lens（2）Distance be more than collimation lens（2）Focal length.
4. the optical telemetry system of autocollimation according to claim 1, it is characterised in that：The voltage-controlled zoom lens
（4）For voltage-controlled liquid zoom lens, filled with PDLC in liquid zoom lens.
5. the optical telemetry system of autocollimation according to claim 1, it is characterised in that：The beam splitter（6）With survey
Measure laser（1）Exit direction be in 45° angle.
6. the optical telemetry system of autocollimation according to claim 1, it is characterised in that：The collimation lens（2）For
Non-spherical lens.
7. the optical telemetry system of the autocollimation according to claim any one of 1-6, it is characterised in that：The voltage-controlled change
Focus lens（4）Focal length be 50-120mm.
8. the optical telemetry system of autocollimation according to claim 7, it is characterised in that：The collimation lens（2）With
Voltage-controlled zoom lens（4）Spacing be 100-240mm.
9. the optical telemetry system of autocollimation according to claim 1, it is characterised in that：The echo collection system
（3）Including receiving lens（31）, light cone shape device（32）, optical filter（33）And signal sensor（34）, wherein receiving lens（31）
For Large Aperture Lenses.
10. the optical telemetry system of autocollimation according to claim 9, it is characterised in that：The Large Aperture Lenses are
Infrared Fresnel Lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710520837.2A CN107167812A (en) | 2017-06-30 | 2017-06-30 | A kind of optical telemetry system of autocollimation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710520837.2A CN107167812A (en) | 2017-06-30 | 2017-06-30 | A kind of optical telemetry system of autocollimation |
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| Publication Number | Publication Date |
|---|---|
| CN107167812A true CN107167812A (en) | 2017-09-15 |
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ID=59828096
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710520837.2A Withdrawn CN107167812A (en) | 2017-06-30 | 2017-06-30 | A kind of optical telemetry system of autocollimation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579529A (en) * | 2020-04-17 | 2020-08-25 | 汕头大学医学院 | Dynamic pre-detection testing device and method based on laser remote sensing |
| CN111929796A (en) * | 2020-08-19 | 2020-11-13 | 青岛澳瑞德电子有限公司 | Light path adjusting structure with variable light spots |
-
2017
- 2017-06-30 CN CN201710520837.2A patent/CN107167812A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579529A (en) * | 2020-04-17 | 2020-08-25 | 汕头大学医学院 | Dynamic pre-detection testing device and method based on laser remote sensing |
| CN111929796A (en) * | 2020-08-19 | 2020-11-13 | 青岛澳瑞德电子有限公司 | Light path adjusting structure with variable light spots |
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Address after: 266580 Qingdao Changjiang Road, Huangdao District, Shandong, No. 66 Applicant after: CHINA University OF PETROLEUM (EAST CHINA) Address before: 257100 north two road, Dongying City, Dongying, Shandong Province, No. 271 Applicant before: CHINA University OF PETROLEUM (EAST CHINA) |
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