CN103592766A - Optical module for improving brightness of lasers and high-frequency pulse laser source - Google Patents
Optical module for improving brightness of lasers and high-frequency pulse laser source Download PDFInfo
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- CN103592766A CN103592766A CN201310514065.3A CN201310514065A CN103592766A CN 103592766 A CN103592766 A CN 103592766A CN 201310514065 A CN201310514065 A CN 201310514065A CN 103592766 A CN103592766 A CN 103592766A
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Abstract
The invention discloses an optical module for improving brightness of lasers and a high-frequency pulse laser source. The optical module comprises a prism set, a cylindrical lens set and a reflector cavity. The prism set is used for combining a plurality of paths of laser rays into one beam. The cylindrical lens set is used for converting the lasers on which beam combining is conducted into sheet lasers. The reflector mirror is used for reflecting the sheet lasers multiple times to improve brightness of lasers. The high-frequency pulse laser source comprises a first laser device set, a second laser device set, a first stripe mirror set, a second stripe mirror set, a polarization beam combining original, a half wave plate, a collimating lens set, a laser guide arm, a focusing lens, a cylindrical lens set and a reflector mirror. When all the laser devices are motivated to emit the lasers at the same time, brightness of the emitted lasers can be suddenly improved, when the laser devices sequentially emit the lasers in turn, and then the emitted lasers can work at high frequency. The optical module for improving brightness of the lasers is simple in structure, easy to control, and high in laser pulse output frequency and brightness through combined pulses of the multiple laser devices, and can be applied to a lighting source of a high-speed camera.
Description
Technical field
The invention belongs to laser lighting technical field, more specifically, relate to a kind of for strengthening optical module and the high-frequency impulse LASER Light Source of laser brightness.
Background technology
In fields of measurement, the light source that often needs high brightness provides illumination for high speed camera, because pulse laser peak value of pulse output energy is large, output frequency is high, can with the advantages such as camera exposure time synchronized, often become the first-selection of illumination, but measure occasion in some hypervelocitys, camera to adopt figure frame per second very high, for with camera synchronization, require the output frequency of pulse laser also very high, the output frequency that improves laser has but caused laser instrument monopulse output energy on the low side, and then camera exposure is not enough, bring camera to adopt figure unintelligible or do not collect the problem of image.
Summary of the invention
Above defect or Improvement requirement for prior art, the invention provides a kind of high-frequency impulse LASER Light Source, solve thus in prior art laser instrument monopulse output energy on the low side, and then camera exposure is not enough, brings camera to adopt figure unintelligible or do not collect the technical matters of image.
The invention provides a kind ofly for strengthening the optical module of laser brightness, comprise for by the synthetic a branch of prism group of multi-path laser light, for the laser closing after bundle is converted to the set of cylindrical lenses of sheet laser and the catoptron chamber that laser brightness is strengthened for sheet laser being carried out to multiple reflections.
Further, described prism group comprises with the striped mirror of surface level placement at 45 ° and is arranged at the polarization coupling original paper on the emitting light path of striped mirror.
Further, described striped mirror is the surperficial flat board that is alternately coated with reflectance coating and anti-reflection film, and light is all transmissions of quilt after incident from a face of described striped mirror, and light is all reflected from the another side incident of described striped mirror.
Further, described set of cylindrical lenses comprises condenser lens, biconcave lens, plano-convex lens and the biconvex lens being successively set in light path.
The present invention also provides a kind of high-frequency impulse LASER Light Source, comprises the first laser array, second laser group, first group of striped mirror, second group of striped mirror, polarization coupling original paper, half-wave plate, collimation lens set, light-conducting arm, condenser lens, set of cylindrical lenses and catoptron chamber; Described the first laser array comprises the laser instrument that n along continuous straight runs is arranged in order, the first striped mirror group comprises the striped mirror that n along continuous straight runs is arranged in order and place from the horizontal by 45° angle, the laser of n laser instrument output is respectively as the incident light of n striped mirror, the emergent light of previous striped mirror through after the transmission of a striped mirror, the laser of laser outgoing n curb horizontal direction after n striped mirror of n laser instrument output; N is more than or equal to 2 integer; Described second laser group comprises m the laser instrument being vertically arranged in order, the second striped mirror group comprise that m is vertically arranged in order and with vertical direction angle at 45 ° place striped mirror, the laser of m laser instrument output is respectively as the incident light of m striped mirror, the emergent light of previous striped mirror through after the transmission of a striped mirror, the laser of laser outgoing m curb vertical direction after m striped mirror of m laser instrument output; M is more than or equal to 2 integer; The laser of n curb horizontal direction is as polarization coupling original paper Yi road incident light, the laser of m curb vertical direction after the 90-degree rotation of half-wave plate polarization direction as another road incident light of described polarization coupling original paper, polarization coupling original paper is by the emergent light after two-way incident combiner successively by forming sheet laser after described collimation lens set, light-conducting arm, condenser lens and cylindrical mirror group, and described laser forms high-frequency impulse laser after the multiple reflections of described catoptron chamber.
Further, described set of cylindrical lenses comprises condenser lens, biconcave lens, plano-convex lens and the biconvex lens being successively set in light path.
High-frequency impulse LASER Light Source provided by the invention has simple in structure, controls simple feature, and it is high that the composite pulse of a plurality of laser instruments makes it have laser pulse output frequency, and the advantage that brightness is large can be applicable to the lighting source of high speed camera.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high-frequency impulse LASER Light Source that provides of the embodiment of the present invention;
Fig. 2 is the composition schematic diagram of the high-frequency impulse LASER Light Source central column face mirror group that provides of the embodiment of the present invention; Wherein (a) is side view, is (b) vertical view;
The energy output timing diagram of each laser instrument in the high-frequency impulse LASER Light Source that Fig. 3 embodiment of the present invention provides;
The energy output timing diagram of 3 laser instruments in the high-frequency impulse LASER Light Source that Fig. 4 embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can not combine mutually as long as do not form each other conflict.
The invention discloses a kind ofly for strengthening the optical module of laser brightness, comprise for by the synthetic a branch of prism group of multi-path laser light, for the laser closing after bundle is converted to the set of cylindrical lenses of sheet laser and the catoptron chamber that laser brightness is strengthened for sheet laser being carried out to multiple reflections.
Should be for the optical module that strengthens laser brightness for by the synthetic a branch of prism group being formed by striped mirror and polarization coupling original paper of multi-path laser light, the laser closing after bundle becomes sheet laser after one group of cylindrical lens, after the cavity multiple reflections that sheet laser forms through a plurality of catoptrons, laser brightness is enhanced, thereby realizes the effect that high brightness irradiates target.
Should have simple in structurely for strengthening the optical module of laser brightness, and control simple feature, it is high that the composite pulse of a plurality of laser instruments makes it have laser pulse output frequency, and the advantage that brightness is large can be applicable to the lighting source of high speed camera.
Wherein, prism group comprises with the striped mirror of surface level placement at 45 ° and is arranged at the polarization coupling original paper on the emitting light path of striped mirror.Striped mirror is the surperficial flat board that is alternately coated with reflectance coating and anti-reflection film, and light is all transmissions of quilt after incident from a face of described striped mirror, and light is all reflected from the another side incident of described striped mirror.
Set of cylindrical lenses comprises condenser lens, biconcave lens, plano-convex lens and the biconvex lens being successively set in light path.
As shown in Figure 1, the present invention also provides a kind of high-frequency impulse LASER Light Source, comprises the first laser array, second laser group, first group of striped mirror, second group of striped mirror, polarization coupling original paper 10, half-wave plate 3, collimation lens set 4, light-conducting arm 5, condenser lens 6, set of cylindrical lenses 7 and catoptron chamber 8; Described the first laser array comprises the laser instrument that n along continuous straight runs is arranged in order, the first striped mirror group comprises the striped mirror that n along continuous straight runs is arranged in order and place from the horizontal by 45° angle, the laser of n laser instrument output is respectively as the incident light of n striped mirror, the emergent light of previous striped mirror through after the transmission of a striped mirror, the laser of laser outgoing n curb horizontal direction after n striped mirror of n laser instrument output; N is more than or equal to 2 integer; Described second laser group comprises m the laser instrument being vertically arranged in order, the second striped mirror group comprise that m is vertically arranged in order and with vertical direction angle at 45 ° place striped mirror, the laser of m laser instrument output is respectively as the incident light of m striped mirror, the emergent light of previous striped mirror through after the transmission of a striped mirror, the laser of laser outgoing m curb vertical direction after m striped mirror of m laser instrument output; M is more than or equal to 2 integer; The laser of n curb horizontal direction is as polarization coupling original paper 10 mono-road incident light, the laser of m curb vertical direction after half-wave plate 3 polarization direction 90-degree rotations as another road incident light of described polarization coupling original paper 10, polarization coupling original paper 10 is by the emergent light after two-way incident combiner successively by described collimation lens set 4, light-conducting arm 5, condenser lens 6 and the rear formation sheet of cylindrical mirror group 7 laser, and described laser forms high-frequency impulse laser after 8 multiple reflections of described catoptron chamber.
The present invention can reach the sharp combiner of a plurality of laser instrument outputs by this device, thereby improves the effect of laser unit pulse output energy; By adopting the structure of multiple reflection mirror, further strengthened the intensity of illumination of laser; By controlling the output timing of laser pulse energy, can realize multi-laser and close the pulse energy of output after bundle and synchronize with the time shutter of high speed camera, the object of Laser output energy maximum while reaching camera exposure.
High-frequency impulse LASER Light Source for the further description embodiment of the present invention provides, now explains technical scheme of the present invention as follows by reference to the accompanying drawings:
As shown in Figure 1, adopt incoherent laser synthetic schemes.Main thought is by forming the incoherent laser of unified direction after this scheme by the laser of the different directions sending of a plurality of laser instruments.
A plurality of laser instruments 1 form respectively A, two groups of B (laser array A and laser array B), striped mirror 2 is the flat board that surface reflection film and anti-reflection film replace, light can all see through from a face in incident, from the incident of another side, reflect completely, with surface level placement at 45 °, " laser array A " laser below can see through striped mirror, after converging, the laser of striped mirror reflection passes through next striped mirror with top, thereby make one group of laser be arranged in row, and can see through polarization coupling original paper 10, in like manner " laser array B " laser also can be arranged in row, through half-wave plate 3 rear polarizer direction rotation 90 degree, and close 10 reflections of bundle original paper by laser polarization, with together with the laser of " solid state laser group A " through collimation lens set 4 and lead condenser lens 6 by light-conducting arm 5, through cylindrical mirror group 7, form sheet laser, sheet laser is after the multiple reflections in catoptron chamber 8, pulse energy further strengthens.Thereby realize the effect that high brightness irradiates cavity internal object, in the cavity that catoptron forms, six faces have at least one side transparent, so that camera photographs the situation in catoptron chamber; Adopt figure for high speed camera 9, if figure cavity is transparent area perpendicular to the one side of surface level, vertical this face of camera lens of high speed camera 9 is installed.
The formation of sheet laser as shown in Figure 2, the laser focusing on after 6 through condenser lens is collimated into arrangement laser row more closely through condenser lens I again, and the set of cylindrical lenses then consisting of biconcave lens II, plano-convex lens III and biconvex lens IV forms sheet laser.
As shown in Figure 3, C0 is the exposure time series figure of camera, C1 is the exposure time series figure of n pulsed laser to Cn, in order to guarantee that time and collected by camera image that laser lighting flash of light occurs occur simultaneously, well under lighting environment, carrying out image acquisition, sequential control is exactly to guarantee can there be maximum intensity of illumination in camera exposure, be that n pulsed laser triggers at the same time and send laser, under the control of time schedule controller, the assurance time shutter of camera and the energy output time of pulse laser are synchronizeed.In the application of particle image velocimetry, can collect better picture like this, analyze the speed obtaining more accurate.
When laser pulse energy is very high, single laser instrument cannot be realized very high frequency, and high speed camera does not have laser lighting when gathering picture.The present invention provides a kind of thinking of synthetic high-frequency impulse laser by the control of time synchronized.Be that a plurality of laser instruments throw light in turn, making the each exposure of high speed camera is all to have the whole visual field of the illuminated with laser light of enough energy.As shown in Figure 4, C0 is the exposure time series of camera, while exposing for the first time, according to sequential chart C1, excite, be that laser instrument 1 sends laser lighting, exposure is to excite according to sequential chart C2 for the second time, and laser instrument 2 sends laser lighting, the like, when n laser instrument (being 3 laser instruments in figure) all sends after a laser, first laser instrument has pumped into enough energy can send superlaser again.
Above content is the further description of the present invention being done in conjunction with concrete embodiment; can not assert that specific embodiment of the invention is confined to these explanations; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. one kind for strengthening the optical module of laser brightness, it is characterized in that, comprise for by the synthetic a branch of prism group of multi-path laser light, for the laser beam of closing after bundle is converted to the set of cylindrical lenses of sheet laser and the catoptron chamber that laser brightness is strengthened for sheet laser being carried out to multiple reflections.
2. optical module as claimed in claim 1, is characterized in that, described prism group comprises with the striped mirror of surface level placement at 45 ° and is arranged at the polarization coupling original paper on the emitting light path of striped mirror.
3. optical module as claimed in claim 2, it is characterized in that, described striped mirror is the surperficial flat board that is alternately coated with reflectance coating and anti-reflection film, and light is all transmissions of quilt after incident from a face of described striped mirror, and light is all reflected from the another side incident of described striped mirror.
4. optical module as claimed in claim 1, is characterized in that, described set of cylindrical lenses comprises condenser lens, biconcave lens, plano-convex lens and the biconvex lens being successively set in light path.
5. a high-frequency impulse LASER Light Source, it is characterized in that, comprise the first laser array, second laser group, first group of striped mirror, second group of striped mirror, polarization coupling original paper (10), half-wave plate (3), collimation lens set (4), light-conducting arm (5), condenser lens (6), set of cylindrical lenses (7) and catoptron chamber (8);
Described the first laser array comprises the laser instrument that n along continuous straight runs is arranged in order, the first striped mirror group comprises the striped mirror that n along continuous straight runs is arranged in order and place from the horizontal by 45° angle, the laser of n laser instrument output is respectively as the incident light of n striped mirror, the emergent light of previous striped mirror through after the transmission of a striped mirror, the laser of laser outgoing n curb horizontal direction after n striped mirror of n laser instrument output; N is more than or equal to 2 integer;
Described second laser group comprises m the laser instrument being vertically arranged in order, the second striped mirror group comprise that m is vertically arranged in order and with vertical direction angle at 45 ° place striped mirror, the laser of m laser instrument output is respectively as the incident light of m striped mirror, the emergent light of previous striped mirror through after the transmission of a striped mirror, the laser of laser outgoing m curb vertical direction after m striped mirror of m laser instrument output; M is more than or equal to 2 integer;
The laser of n curb horizontal direction is as polarization coupling original paper (10) Yi road incident light, the laser of m curb vertical direction after the 90-degree rotation of half-wave plate (3) polarization direction as another road incident light of described polarization coupling original paper (10), polarization coupling original paper (10) is by the emergent light after two-way incident combiner successively by forming sheet laser after described collimation lens set (4), light-conducting arm (5), condenser lens (6) and cylindrical mirror group (7), described laser forms high-frequency impulse laser after the multiple reflections of described catoptron chamber (8).
6. high-frequency impulse LASER Light Source as claimed in claim 5, is characterized in that, described set of cylindrical lenses (7) comprises condenser lens, biconcave lens, plano-convex lens and the biconvex lens being successively set in light path.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310514065.3A CN103592766B (en) | 2013-10-28 | 2013-10-28 | A kind of optical module for strengthening laser brightness and high-frequency pulsed lasers light source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310514065.3A CN103592766B (en) | 2013-10-28 | 2013-10-28 | A kind of optical module for strengthening laser brightness and high-frequency pulsed lasers light source |
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| CN103592766A true CN103592766A (en) | 2014-02-19 |
| CN103592766B CN103592766B (en) | 2016-01-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186391A (en) * | 2015-08-13 | 2015-12-23 | 苏州大学 | Hybrid wavelength laser wire-stripping method and wire-stripping apparatus of wire sheaths |
| CN110547762A (en) * | 2018-05-30 | 2019-12-10 | 深圳英美达医疗技术有限公司 | Photoacoustic imaging system and imaging method thereof |
| CN113369721A (en) * | 2021-07-07 | 2021-09-10 | 广东原点智能技术有限公司 | Double-laser processing system and method |
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| CN1125304A (en) * | 1994-12-07 | 1996-06-26 | 葛晓勤 | Light source for plane parallel light |
| JPH118430A (en) * | 1997-04-25 | 1999-01-12 | Nikon Corp | Laser device and projection aligner and pulse laser oscillation method |
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2013
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Patent Citations (4)
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| US5361275A (en) * | 1992-09-03 | 1994-11-01 | Deutsche Forschungsanstalt Fuer Luftund Raumfahrt E.V. | Apparatus for removing material from a target |
| CN1125304A (en) * | 1994-12-07 | 1996-06-26 | 葛晓勤 | Light source for plane parallel light |
| JPH118430A (en) * | 1997-04-25 | 1999-01-12 | Nikon Corp | Laser device and projection aligner and pulse laser oscillation method |
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Non-Patent Citations (1)
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| 尧舜等: "基于偏振藕合的千瓦级半导体激光加工系统", 《激光杂志》, vol. 29, no. 5, 31 December 2008 (2008-12-31), pages 58 - 59 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186391A (en) * | 2015-08-13 | 2015-12-23 | 苏州大学 | Hybrid wavelength laser wire-stripping method and wire-stripping apparatus of wire sheaths |
| CN110547762A (en) * | 2018-05-30 | 2019-12-10 | 深圳英美达医疗技术有限公司 | Photoacoustic imaging system and imaging method thereof |
| CN113369721A (en) * | 2021-07-07 | 2021-09-10 | 广东原点智能技术有限公司 | Double-laser processing system and method |
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| CN103592766B (en) | 2016-01-13 |
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