CN103592766B - A kind of optical module for strengthening laser brightness and high-frequency pulsed lasers light source - Google Patents
A kind of optical module for strengthening laser brightness and high-frequency pulsed lasers light source Download PDFInfo
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- CN103592766B CN103592766B CN201310514065.3A CN201310514065A CN103592766B CN 103592766 B CN103592766 B CN 103592766B CN 201310514065 A CN201310514065 A CN 201310514065A CN 103592766 B CN103592766 B CN 103592766B
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Abstract
The invention discloses a kind of optical module for strengthening laser brightness and high-frequency pulsed lasers light source; Optical module comprises for multi-path laser light being synthesized a branch of prism group, be used for the laser after closing bundle to be converted to the set of cylindrical lenses of sheet laser and be used for sheet laser to carry out the catoptron chamber that multiple reflections makes laser brightness strengthen.High-frequency pulsed lasers 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; When all laser instruments simultaneously stimulated luminescence, then the laser brightness sent can be made sharply to strengthen, when laser instrument sends laser successively in turn, then the laser work that sends can be made a very high frequency.Structure of the present invention is simple, controls simple, and it is high that the composite pulse of multiple laser instrument 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.
Description
Technical field
The invention belongs to technical field of laser illumination, more specifically, relating to a kind of optical module for strengthening laser brightness and high-frequency pulsed lasers light source.
Background technology
In fields of measurement, the light source of high brightness is often needed to provide 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, in order to camera synchronization, require that the output frequency of pulse laser is also very high, improve the output frequency of laser and but result in laser instrument monopulse to export energy on the low side, and then camera exposure is not enough, camera is brought to adopt figure unintelligible or do not collect the problem of image.
Summary of the invention
For above defect or the Improvement requirement of prior art, the invention provides a kind of high-frequency pulsed lasers light source, solving laser instrument monopulse in prior art thus, to export 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.
Sheet laser is carried out the catoptron chamber that multiple reflections makes laser brightness strengthen by the set of cylindrical lenses and being used for that the invention provides a kind of optical module for strengthening laser brightness, comprising for multi-path laser light being synthesized a branch of prism group, be used for the laser after closing bundle to be converted to sheet laser.
Further, the described prism group striped mirror that comprises the placement at 45 ° with surface level and the polarization coupling original paper that is arranged on the emitting light path of striped mirror.
Further, described striped mirror is the flat board that surface is alternately coated with reflectance coating and anti-reflection film, and light is by whole transmission after incidence a face of described striped mirror, and light is all reflected after the another side incidence of described striped mirror.
Further, described set of cylindrical lenses comprises the condenser lens be successively set in light path, biconcave lens, plano-convex lens and biconvex lens.
Present invention also offers a kind of high-frequency pulsed lasers light source, comprise 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 first laser array comprises n the laser instrument be arranged in order in the horizontal direction, first striped mirror group comprises n and is arranged in order in the horizontal direction and the striped mirror placed from the horizontal by 45° angle, the laser that n laser instrument exports 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 that n laser instrument exports; N be more than or equal to 2 integer; Described second laser group comprises m the laser instrument be vertically arranged in order, second striped mirror group comprise m to be vertically arranged in order and with vertical direction angle at 45 ° place striped mirror, the laser that m laser instrument exports 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 that m laser instrument exports; M be more than or equal to 2 integer; The laser of n curb horizontal direction is as a road incident light of polarization coupling original paper, 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 incident for two-way combiner successively by formation sheet laser after described collimation lens set, light-conducting arm, condenser lens and cylindrical mirror group, and described laser forms high-frequency pulsed lasers after the multiple reflections of described catoptron chamber.
Further, described set of cylindrical lenses comprises the condenser lens be successively set in light path, biconcave lens, plano-convex lens and biconvex lens.
It is simple that high-frequency pulsed lasers light source provided by the invention has structure, controls simple feature, and it is high that the composite pulse of multiple laser instrument 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 pulsed lasers light source that the embodiment of the present invention provides;
Fig. 2 is the composition schematic diagram of the high-frequency pulsed lasers light source central column face mirror group that the embodiment of the present invention provides; Wherein (a) is side view, and (b) is vertical view;
The Energy transmission sequential chart of each laser instrument in the high-frequency pulsed lasers light source that Fig. 3 embodiment of the present invention provides;
The Energy transmission sequential chart of 3 laser instruments in the high-frequency pulsed lasers 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 clearly understand, 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, be not intended to limit the present invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
Sheet laser is carried out the catoptron chamber that multiple reflections makes laser brightness strengthen by the set of cylindrical lenses and being used for that the invention discloses a kind of optical module for strengthening laser brightness, comprising for multi-path laser light being synthesized a branch of prism group, be used for the laser after closing bundle to be converted to sheet laser.
This optical module being used for strengthening laser brightness is for by the prism group be made up of striped mirror and polarization coupling original paper a branch of for the synthesis of multi-path laser light, the laser closed after bundle becomes sheet laser after one group of cylindrical lens, sheet laser laser brightness after the cavity multiple reflections that multiple catoptron forms is enhanced, thus realizes the effect that high brightness irradiates target.
It is simple that this optical module being used for strengthening laser brightness has structure, controls simple feature, and it is high that the composite pulse of multiple laser instrument 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, the prism group striped mirror that comprises the placement at 45 ° with surface level and the polarization coupling original paper that is arranged on the emitting light path of striped mirror.Striped mirror is the flat board that surface is alternately coated with reflectance coating and anti-reflection film, and light is by whole transmission after incidence a face of described striped mirror, and light is all reflected after the another side incidence of described striped mirror.
Set of cylindrical lenses comprises the condenser lens be successively set in light path, biconcave lens, plano-convex lens and biconvex lens.
As shown in Figure 1, present invention also offers a kind of high-frequency pulsed lasers light source, 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 first laser array comprises n the laser instrument be arranged in order in the horizontal direction, first striped mirror group comprises n and is arranged in order in the horizontal direction and the striped mirror placed from the horizontal by 45° angle, the laser that n laser instrument exports 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 that n laser instrument exports; N be more than or equal to 2 integer; Described second laser group comprises m the laser instrument be vertically arranged in order, second striped mirror group comprise m to be vertically arranged in order and with vertical direction angle at 45 ° place striped mirror, the laser that m laser instrument exports 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 that m laser instrument exports; M be more than or equal to 2 integer; The laser of n curb horizontal direction is as a road incident light of polarization coupling original paper 10, 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 incident for two-way combiner successively by formation sheet laser after described collimation lens set 4, light-conducting arm 5, condenser lens 6 and cylindrical mirror group 7, and described laser forms high-frequency pulsed lasers after the multiple reflections of described catoptron chamber 8.
The present invention can reach the sharp combiner exported by multiple laser instrument by this device, thus improves the effect of the laser unit output energy of pulse; By adopting the structure of multiple reflection mirror, further enhancing the intensity of illumination of laser; By controlling the output timing of laser pulse energy, the pulse energy that can realize exporting after multi-laser closes bundle is synchronous with the time shutter of high speed camera, the object that when reaching camera exposure, Laser output energy is maximum.
In order to the high-frequency pulsed lasers light source that the further description embodiment of the present invention provides, now explain technical scheme of the present invention by reference to the accompanying drawings as follows:
As shown in Figure 1, incoherent Laser synthesizing scheme is adopted.Main thought is by forming the incoherent laser in unified direction after the program by the laser of the different directions sent of multiple laser instrument.
Multiple laser instrument 1 forms A respectively, B two groups (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 from a face incident all through, reflect completely from the incidence of another side, placement at 45 ° with surface level, " laser array A " laser below can through striped mirror, with top after the laser that striped mirror reflects converges by next striped mirror, thus make one group of laser arrangement become row, and can 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 90-degree rotation, and reflected by laser polarization conjunction bundle original paper 10, condenser lens 6 is led by light-conducting arm 5 together with the laser of " solid state laser group A " through collimation lens set 4, through cylindrical mirror group 7 formation sheet laser, sheet laser is after the multiple reflections in catoptron chamber 8, pulse energy strengthens further.Thus realizing the effect that high brightness irradiates cavity internal object, in the cavity of catoptron composition, 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, camera lens this face vertical of high speed camera 9 is installed.
The formation of sheet laser as shown in Figure 2, laser after condenser lens focuses on 6 is collimated into arrangement laser row more closely, then by the set of cylindrical lenses formation sheet laser of biconcave lens II, plano-convex lens III and biconvex lens IV composition through condenser lens I again.
As shown in Figure 3, C0 is the exposure time series figure of camera, C1 to Cn is the exposure time series figure of n pulsed laser, in order to ensure that the time that laser lighting flash of light occurs and collected by camera image occur simultaneously, namely under good lighting environment, image acquisition is carried out, sequential control is exactly ensure can there be maximum intensity of illumination when camera exposure, namely n pulsed laser triggers at the same time and sends laser, under the control of time schedule controller, ensure the time shutter of camera and the Energy transmission time synchronized of pulse laser.Like this in the application of particle image velocimetry, better picture can be collected, analyze the speed obtained more accurate.
When laser pulse energy is very high, single laser instrument cannot realize very high frequency, and namely high speed camera does not have laser lighting when gathering picture.The present invention provides a kind of thinking of synthesizing high-frequency pulsed lasers by the control of time synchronized.Namely multiple laser instrument throws light in turn, and it is all have the whole visual field of the illuminated with laser light of enough energy that high speed camera is exposed at every turn.As shown in Figure 4, C0 is the exposure time series of camera, excite according to sequential chart C1 during first time exposure, namely laser instrument 1 sends laser lighting, second time exposure excites according to sequential chart C2, and namely laser instrument 2 sends laser lighting, the like, after n laser instrument (being 3 laser instruments in figure) all sends a laser, first laser instrument has pumped into enough energy and can send superlaser again.
Above content is the further description done the present invention 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; some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. one kind for strengthening the optical module of laser brightness, it is characterized in that, comprise for multi-path laser light being synthesized a branch of prism group, be used for the laser beam after closing bundle to be converted to the catoptron chamber that sheet laser is carried out multiple reflections laser brightness is strengthened by the set of cylindrical lenses and being used for of sheet laser;
The striped mirror that described prism group comprises the placement at 45 ° with surface level and the polarization coupling original paper be arranged on the emitting light path of striped mirror;
Described striped mirror is the flat board that surface is alternately coated with reflectance coating and anti-reflection film, and light is by whole transmission after incidence a face of described striped mirror, and light is all reflected after the another side incidence of described striped mirror.
2. optical module as claimed in claim 1, it is characterized in that, described set of cylindrical lenses comprises the condenser lens be successively set in light path, biconcave lens, plano-convex lens and biconvex lens.
3. a high-frequency pulsed lasers light source, it is characterized in that, comprise the first laser array, second laser group, the first striped mirror group, the second striped mirror group, 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 first laser array comprises n the laser instrument be arranged in order in the horizontal direction, first striped mirror group comprises n and is arranged in order in the horizontal direction and the striped mirror placed from the horizontal by 45° angle, the laser that n laser instrument exports 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 that n laser instrument exports; N be more than or equal to 2 integer;
Described second laser group comprises m the laser instrument be vertically arranged in order, second striped mirror group comprise m to be vertically arranged in order and with vertical direction angle at 45 ° place striped mirror, the laser that m laser instrument exports 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 that m laser instrument exports; M be more than or equal to 2 integer;
The laser of n curb horizontal direction is as a road incident light of polarization coupling original paper (10), 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) by the emergent light after incident for two-way combiner successively by described collimation lens set (4), light-conducting arm (5), condenser lens (6) and set of cylindrical lenses (7) formation sheet laser afterwards, described laser forms high-frequency pulsed lasers after described catoptron chamber (8) multiple reflections.
4. high-frequency pulsed lasers light source as claimed in claim 3, it is characterized in that, described set of cylindrical lenses (7) comprises the condenser lens be successively set in light path, biconcave lens, plano-convex lens and biconvex lens.
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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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| 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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| CN103592766B true CN103592766B (en) | 2016-01-13 |
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| 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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| 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 |
| CN101854030A (en) * | 2010-05-04 | 2010-10-06 | 长春德信光电技术有限公司 | Laser light source device of high-power semiconductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH118430A (en) * | 1997-04-25 | 1999-01-12 | Nikon Corp | Laser device and projection aligner and pulse laser oscillation method |
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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 |
| CN101854030A (en) * | 2010-05-04 | 2010-10-06 | 长春德信光电技术有限公司 | Laser light source device of high-power semiconductor |
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