CN102879905A - Device for observing azimuth conversion of light spots and beam shaping method - Google Patents
Device for observing azimuth conversion of light spots and beam shaping method Download PDFInfo
- Publication number
- CN102879905A CN102879905A CN2012103401669A CN201210340166A CN102879905A CN 102879905 A CN102879905 A CN 102879905A CN 2012103401669 A CN2012103401669 A CN 2012103401669A CN 201210340166 A CN201210340166 A CN 201210340166A CN 102879905 A CN102879905 A CN 102879905A
- Authority
- CN
- China
- Prior art keywords
- hot spot
- shading
- observing
- hole
- bearing change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention provides a device for observing the azimuth conversion of light spots. The device is characterized by comprising a light-transmission body, wherein a plurality of light-shading holes are formed in the light-transmission body and form an asymmetric pattern. The invention also provides a beam shaping method based on the device for observing the azimuth conversion of the light spots. By the invention, an azimuth conversion relation between output light spots of a complicated laser (or a laser system) and initial light spots can be conveniently, quickly and accurately obtained. Moreover, by the invention, beam spatial shaping can be conveniently realized.
Description
Technical field
The present invention relates to photoelectron and laser technology field, specifically, the present invention relates to a kind of device and beam shaping method for observing the hot spot bearing change.
Background technology
Numerous optical elements such as rotor, wave plate, total reflective mirror is often arranged in the large complicated laser instrument, and these elements can make hot spot overturn, rotate.Describe for convenient, the present invention is with the upset of hot spot, the bearing change that rotation is called hot spot.At present, also the not auxiliary device of observing the bearing change of this hot spot generally can only directly be observed output facula and initial hot spot, infers that then output facula is with respect to the bearing change relation of initial hot spot.Yet the shape of hot spot is symmetrical often, for this type of hot spot, is difficult to draw its bearing change relation by direct observation.Fig. 1 shows an example of initial hot spot and output facula, and wherein left hand view is the initial hot spot that enters laser instrument, and right part of flg is the output facula that CCD collects in the laser instrument outlet, obviously, in this example, by direct observation, be difficult to see what kind of bearing change has occured glossing up.
So, current in the urgent need to a kind of method that can make the more simple servicing unit of observation hot spot bearing change and observe accordingly the hot spot bearing change.
Summary of the invention
One of purpose of the present invention provides a kind of can making and observes the convenient servicing unit of hot spot bearing change.
Two of purpose of the present invention provides a kind of beam shaping method of the device based on being used for observation hot spot bearing change.
According to an aspect of the present invention, the invention provides a kind of device for observing the hot spot bearing change, comprise light penetrating object, have a plurality of shadings hole in the described light penetrating object, and described a plurality of shadings hole forms asymmetric pattern.
Wherein, have four shading holes in the described light penetrating object, wherein three shading holes are in respectively the position of the different directions in another shading hole, and the distance in described three shading holes and another shading hole is different.
Wherein, in described four shading holes, the second shading hole is in the right positions in the first shading hole, and the 3rd shading hole is in the lower position in the first shading hole, and the 4th shading hole is in the diagonal position in the first shading hole.
Wherein, the distance in described the second shading hole and the first shading hole significantly is different from the distance in the 3rd shading hole and the first shading hole.
Wherein, the edge of the photic zone of described light penetrating object and shading circular hole has transitional zone, and the transmitance of light is become not saturating gradually in this transitional zone by full impregnated.
Wherein, the edge of photic zone and shading circular hole has the described light penetrating object of transitional zone by the LCD space light modulator realization that writes gray level image.
Wherein, described device for observing the hot spot bearing change also comprises the polarizer, left-handed 45 ° of rotors, 45 ° of rotors of dextrorotation and the analyzer that sets gradually along light path, described LCD space light modulator is arranged between left-handed 45 ° of rotors and 45 ° of rotors of dextrorotation, the orthogonal thereto placement of the described polarizer and analyzer.
Wherein, described device for observing the hot spot bearing change also comprises the polarizer, two 1/2nd slides and the analyzers that set gradually along light path, described LCD space light modulator is arranged between two described 1/2nd slides, the orthogonal thereto placement of the described polarizer and analyzer.
Wherein, the described polarizer is polarization splitting prism or polaroid.
According to a further aspect in the invention, the invention provides a kind of beam shaping method of the device based on being used for observation hot spot bearing change, comprise the following steps:
1) utilizes described device for observing the hot spot bearing change, obtain output facula with respect to the bearing change relation of initial hot spot;
2) adjust each regional intensity distributions of initial hot spot, so that corresponding the change occurs the light intensity in zone corresponding to output facula, thereby realize the spacing shaping of light beam.
Compared with prior art, the present invention has following technique effect:
1, the present invention can draw the output facula of complex laser (or laser system) easily and fast, exactly with respect to the bearing change relation of initial hot spot.
2, the present invention can realize spatial beam shaping, and shaping effect is good, speed is fast, mode of operation is easy.
Description of drawings
Fig. 1 shows an example of initial hot spot and output facula;
Fig. 2 shows the floor map of the device that is used for observation hot spot bearing change of one embodiment of the invention;
Fig. 3 (a) to (h) shows and makes initial hot spot by the synoptic diagram of the various situations of gained output facula behind the diaphragm of Fig. 2;
Fig. 4 shows the synoptic diagram of output facula elongated situation on a dimension;
Fig. 5 shows the synoptic diagram that shading bore edges place has transitional zone in the one embodiment of the invention;
The edge that Fig. 6 shows a shading circular hole among the present invention has the light path synoptic diagram of implementation of device that is used for observing the hot spot bearing change of transitional zone;
Fig. 7 shows the asymmetric pattern that the shading hole in a preferred embodiment of the invention forms.
Embodiment
Below in conjunction with drawings and Examples the present invention is done further description.
Fig. 2 shows the floor map of the device that is used for observation hot spot bearing change of one embodiment of the invention, and as shown in Figure 2, this device is a square light penetrating object on the whole, has four shading circular holes in this light penetrating object, forms a diaphragm.Concrete, as shown in Figure 2, the length of side of square diaphragm is L, the first circular hole 1 center of circle to two is faced the limit and (two is faced two limits that the limit refers to the close described circular hole of square light penetrating object, hereinafter repeat no more) distance H=L/4, the second circular hole 2 is in the right positions of the first circular hole 1, and the second circular hole 2 centers of circle to the first circular hole 1 center of circle apart from K=L/2, distance H=the L/4 on limit is faced in the second circular hole 2 centers of circle to two, the 4th circular hole 4 is at the diagonal position of the first circular hole 1, and the distance that the limit is faced in the 4th circular hole 4 centers of circle to two also is H, and the 3rd circular hole 3 is in the lower position of the first circular hole 1, and the 3rd circular hole 3 centers of circle are K/2 to the distance in the first circular hole 1 center of circle.Can find out, the second circular hole 2, the 3rd circular hole 3, the 4th circular hole 4 lay respectively at the position of the different directions of the first circular hole 1, and the distance of the second circular hole 2, the 3rd circular hole 3, the 4th circular hole 4 and the first circular hole 1 is different, and these four circular holes just can form an asymmetric pattern like this.Make initial hot spot by this diaphragm, four blackspots corresponding to described the first circular hole 1, the second circular hole 2, the 3rd circular hole 3, the 4th circular hole 4 will appear in the output facula of gained, according to these four directions that blackspot is indicated, can draw output facula with respect to the bearing change relation of initial hot spot.
Fig. 3 (a) to (h) shows and makes initial hot spot by the synoptic diagram of the various situations of gained output facula behind the diaphragm of Fig. 2.Usually, make initial hot spot by the diaphragm of Fig. 2, through large complicated laser instrument, collect output facula by CCD again.Mainly there are eight kinds of situations in this output facula, wherein, the output facula synoptic diagram of conversion does not occur in Fig. 3 (a) for the hot spot orientation, Fig. 3 (b) is turn clockwise 90 ° output facula synoptic diagram of hot spot, Fig. 3 (c) is turn clockwise 180 ° output facula synoptic diagram of hot spot, Fig. 3 (d) is rotated counterclockwise 90 ° output facula synoptic diagram for hot spot, the output facula synoptic diagram of Fig. 3 (e) for overturning about hot spot, the output facula synoptic diagram that Fig. 3 (f) spins upside down for hot spot, Fig. 3 (g) is turn clockwise again 90 ° output facula synoptic diagram of upset about hot spot, and Fig. 3 (h) be the output facula synoptic diagram of another mistake hour hands half-twist of overturning about hot spot.Understand easily, belong among Fig. 3 (a) to (h) which kind of as long as judge output facula, can draw easily and fast, exactly output facula with respect to the bearing change relation of initial hot spot.
Hot spot output facula elongated situation on a dimension occurs, as shown in Figure 4 sometimes after large complicated laser instrument middle and long distance transmission.In above-described embodiment, because there is marked difference in the first circular hole 1 center of circle to the distance in the distance in the second circular hole 2 centers of circle and three circular holes, 3 centers of circle, the first circular hole 1 center of circle to the, therefore, even if hot spot is elongated on a dimension, still can judge to the aspect relation (namely distinguishing easily the first circular hole 1 to second circular hole 2 and the first circular hole 1 to the 3rd circular hole 3 these both directions) of four blackspots in the output facula, thereby observe rapidly and accurately the hot spot orientation what conversion occur.Certainly, in another embodiment, also a circular hole can be between the first circular hole 1 and the second circular hole 2, increased, the first circular hole 1 to second circular hole 2 and the first circular hole 1 to the 3rd circular hole 3 these both directions can be distinguished equally like this.
Need to prove, in other embodiments, as long as the first circular hole 1 center of circle is distinct with the distance in three circular holes, 3 centers of circle, the first circular hole 1 center of circle to the to the distance in the second circular hole 2 centers of circle, in the indeformable situation of output facula, also can reach the effect of accurate observation hot spot bearing change.
In a preferred embodiment, the edge of the photic zone of described light penetrating object and shading circular hole has transitional zone, in this transitional zone the transmitance of light become by full impregnated gradually not saturating, as shown in Figure 5.So that the edge of shading circular hole is softened, can suppress or avoid hot spot inside diffraction fringe to occur like this, thereby so that output facula be convenient to observation more.On specific implementation, described light penetrating object can be realized by LCD space light modulator, can realize easily the transitional zone of its shading circular hole edge by write image in LCD space light modulator.In addition, the length of side of diaphragm, the radius of circular hole can arbitrarily be revised efficiently according to the size of launching spot.
The edge that Fig. 6 illustrates a shading circular hole has the light path synoptic diagram of implementation of device that is used for observing the hot spot bearing change of transitional zone.With reference to figure 6, the device that should be used for observe the hot spot bearing change comprise that the polarization splitting prism 1(that sets gradually along light path was Polarization Cube Beamsplitter, was abbreviated as PBS), left-handed 45 ° of rotors 2, LCD space light modulator 3,45 ° of rotors 4 of dextrorotation and polarization splitting prism 5.Wherein, can form easily the light penetrating object that wherein has a plurality of shadings hole by in LCD space light modulator 3, writing image, and described a plurality of shadings hole forms asymmetric pattern.Among this embodiment, first PBS plays the effect (understand easily, PBS also can replace with polaroid) of the polarizer, and it makes polarisation of light attitude level.Left-handed 45 ° of rotors can make the long axis of liquid crystal molecule of polarisation of light attitude and LCD space light modulator at 45 ° left-handed 45 ° of the light of polarization state level like this, thereby make the Modulation and Amplitude Modulation of LCD space light modulator reach maximum.Polarization state was rotated 90 ° when the left-handed 45 ° light of polarization state passed through LCD space light modulator, by 45 ° of rotors of dextrorotation polarization state was transferred to vertically again, played at last the effect of analyzer by the polarization splitting prism 5(of vertical placement) outgoing.Can find out that from above-described embodiment the polarising means (device is vertical with analyzer partially namely) of pair of orthogonal will be arranged before and after the LCD space light modulator.Can be a pair of PBS, also can be a pair of polaroid.The polarising means of front has been responsible for partially, horizontal polarization attitude process, and the polarising means of back is responsible for analyzing, vertical polarization attitude process.In addition, according to another preferred embodiment of the invention, above-mentioned left-handed 45 ° of rotors and 45 ° of rotors of dextrorotation also can replace with two 1/2nd wave plates, and the line polarisation of incident and the optical axis included angle of 1/2nd wave plates are 22.5 °, can play equally the effect that makes 45 ° of polarisation of light attitude rotations.
In addition, it is square to one skilled in the art will readily appreciate that among the present invention that light penetrating object is not limited to, and the shading hole also is not limited to circle (for example can for square).And the number in shading hole and position grouping also can be different from above-described embodiment, as long as a plurality of shadings hole forms asymmetric pattern, can reach auxiliary purpose of observing hot spot bearing change relation.
In a preferred embodiment, described asymmetric pattern need satisfy following requirement: the virgin state of this pattern, turn clockwise 90 °, turn clockwise 180 °, be rotated counterclockwise 90 °, about overturn, spin upside down, about upset turn clockwise again 90 °, about eight kinds of states such as upset another mistake hour hands half-twist different, for example Fig. 2, pattern shown in Figure 7.Can help like this observing and judge more exactly hot spot bearing change relation.
According to another embodiment of the present invention, also provide a kind of beam shaping method based on above-mentioned device for observing the hot spot bearing change.For ease of understanding, in conjunction with Fig. 1 beam shaping is described first.With reference to figure 1, can find out from the right figure of Fig. 1, four angles of output facula brighter (and the bright degree in four angles is also different with the zone), and zone line is darker, just need to carry out spacing shaping to light beam if expect the uniform hot spot of whole regional luminance.If draw the bearing change relation of institute's output facula that initial hot spot and CCD collect, namely can be by changing the intensity distributions of initial hot spot, control the regional dimmed of the high local corresponding initial hot spot of the upper brightness of CCD, thereby reach the purpose of light beam being carried out spacing shaping.
In conjunction with the preamble analysis, the beam shaping method of present embodiment comprises the following steps:
1) utilizes described device for observing the hot spot bearing change, obtain output facula with respect to the bearing change relation of initial hot spot;
2) adjust each regional intensity distributions of initial hot spot, so that corresponding the change occurs the light intensity in zone corresponding to output facula, thereby realize the spacing shaping of light beam.
In addition, the beam shaping method of present embodiment can cooperate other beam shaping method to use, and with the method for present embodiment output beam is done first preliminary shaping, with other beam shaping method light beam is done further spacing shaping again, can reach good effect.
Compare with existing beam shaping technology, the present invention has following technique effect.
1, shaping effect is good; Effect after the shaping is weighed with the beam modulation near field degree, the mean value of the maximal value of beam modulation near field degree=collection hot spot gray scale/collection hot spot gray scale.The beam modulation near field degree can reach about 1.2 after adopting shaping of the present invention, and general shaping technique beam modulation near field degree is about 1.4.
2, shaping speed is fast;
3, shaping mode of operation is simple.
At last, the above embodiments only are used for illustrating the present invention, and it should not be construed is that protection scope of the present invention is carried out any restriction.And, it will be apparent to those skilled in the art that do not breaking away under above-described embodiment spirit and the principle, the various equivalent variation that above-described embodiment is carried out, modification and in the text not the various improvement of description all within the protection domain of this patent.
Claims (10)
1. a device that is used for observing the hot spot bearing change is characterized in that, comprises light penetrating object, have a plurality of shadings hole in the described light penetrating object, and described a plurality of shadings hole forms asymmetric pattern.
2. the device for observing the hot spot bearing change according to claim 1, it is characterized in that, have four shading holes in the described light penetrating object, wherein three shading holes are in respectively the position of the different directions in another shading hole, and the distance in described three shading holes and another shading hole is different.
3. the device for observing the hot spot bearing change according to claim 2, it is characterized in that, in described four shading holes, the second shading hole is in the right positions in the first shading hole, the 3rd shading hole is in the lower position in the first shading hole, and the 4th shading hole is in the diagonal position in the first shading hole.
4. the device for observing the hot spot bearing change according to claim 3 is characterized in that the distance in described the second shading hole and the first shading hole significantly is different from the distance in the 3rd shading hole and the first shading hole.
5. each described device for observing the hot spot bearing change in 4 according to claim 1 is characterized in that the edge of the photic zone of described light penetrating object and shading circular hole has transitional zone, and the transmitance of light is become not saturating gradually in this transitional zone by full impregnated.
6. the device for observing the hot spot bearing change according to claim 5 is characterized in that, described light penetrating object is realized by the LCD space light modulator that writes gray level image.
7. the device for observing the hot spot bearing change according to claim 6, it is characterized in that, described device for observing the hot spot bearing change also comprises the polarizer, left-handed 45 ° of rotors, 45 ° of rotors of dextrorotation and the analyzer that sets gradually along light path, described LCD space light modulator is arranged between left-handed 45 ° of rotors and 45 ° of rotors of dextrorotation, the orthogonal thereto placement of the described polarizer and analyzer.
8. the device for observing the hot spot bearing change according to claim 6, it is characterized in that, described device for observing the hot spot bearing change also comprises the polarizer, two 1/2nd slides and the analyzers that set gradually along light path, described LCD space light modulator is arranged between two described 1/2nd slides, the orthogonal thereto placement of the described polarizer and analyzer.
9. according to claim 7 or the device of 8 described intercepting hot spots, it is characterized in that the described polarizer is polarization splitting prism or polaroid.
10. the beam shaping method based on each described device for observing the hot spot bearing change in the claim 1 to 4 is characterized in that, comprises the following steps:
1) utilizes described device for observing the hot spot bearing change, obtain output facula with respect to the bearing change relation of initial hot spot;
2) adjust each regional intensity distributions of initial hot spot, so that corresponding the change occurs the light intensity in zone corresponding to output facula, thereby realize the spacing shaping of light beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210340166.9A CN102879905B (en) | 2012-09-13 | 2012-09-13 | A kind of device for observing hot spot bearing change and beam shaping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210340166.9A CN102879905B (en) | 2012-09-13 | 2012-09-13 | A kind of device for observing hot spot bearing change and beam shaping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102879905A true CN102879905A (en) | 2013-01-16 |
| CN102879905B CN102879905B (en) | 2015-10-28 |
Family
ID=47481288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210340166.9A Expired - Fee Related CN102879905B (en) | 2012-09-13 | 2012-09-13 | A kind of device for observing hot spot bearing change and beam shaping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102879905B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192537A (en) * | 2017-04-25 | 2017-09-22 | 中国科学院光电研究院 | The verification method and system of a kind of diffraction optical element laser shaping effect |
| CN113376755A (en) * | 2021-04-29 | 2021-09-10 | 中国电子科技集团公司第十四研究所 | Device and method for adjusting optical fiber collimator of multi-path optical fiber rotary connector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3519992A (en) * | 1966-08-10 | 1970-07-07 | North American Rockwell | Photointerpretation system |
| CN101403822A (en) * | 2007-10-01 | 2009-04-08 | 奥林巴斯株式会社 | Regulating device, laser processing device, regulating method and program |
| CN102566095A (en) * | 2011-09-15 | 2012-07-11 | 北京国科世纪激光技术有限公司 | Method and system for measuring gamma curves of liquid crystal spatial light modulator |
| CN102601519A (en) * | 2011-01-18 | 2012-07-25 | 奥林巴斯株式会社 | Adjustment apparatus, laser machining apparatus, and adjustment method |
-
2012
- 2012-09-13 CN CN201210340166.9A patent/CN102879905B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3519992A (en) * | 1966-08-10 | 1970-07-07 | North American Rockwell | Photointerpretation system |
| CN101403822A (en) * | 2007-10-01 | 2009-04-08 | 奥林巴斯株式会社 | Regulating device, laser processing device, regulating method and program |
| CN102601519A (en) * | 2011-01-18 | 2012-07-25 | 奥林巴斯株式会社 | Adjustment apparatus, laser machining apparatus, and adjustment method |
| CN102566095A (en) * | 2011-09-15 | 2012-07-11 | 北京国科世纪激光技术有限公司 | Method and system for measuring gamma curves of liquid crystal spatial light modulator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192537A (en) * | 2017-04-25 | 2017-09-22 | 中国科学院光电研究院 | The verification method and system of a kind of diffraction optical element laser shaping effect |
| CN113376755A (en) * | 2021-04-29 | 2021-09-10 | 中国电子科技集团公司第十四研究所 | Device and method for adjusting optical fiber collimator of multi-path optical fiber rotary connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102879905B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8804121B2 (en) | Cell observation device and cell observation method | |
| US20170242231A1 (en) | Structured illumination optical system and structured illumination microscope device | |
| CN101361648A (en) | Visual target displaying device | |
| Greaves et al. | A submillimetre imaging polarimeter at the James Clerk Maxwell Telescope | |
| CN108303020A (en) | A kind of digital hologram and the united binary channels phase-shifting phase measurement microscope of differential interference | |
| CN106462017B (en) | Achromatism phase-modulator and optical device | |
| CN104641264A (en) | Brightness enhancement film with substantially non-imaging embedded diffuser | |
| CN110044931B (en) | Detection apparatus for curved surface glass surface and internal defect | |
| CN102830498A (en) | Dynamic large-view-field small-distortion star simulator optical system | |
| CN103414911A (en) | Method and device for naked eye three-dimensional display luminance uniformity evaluation | |
| CN102879905B (en) | A kind of device for observing hot spot bearing change and beam shaping method | |
| CN104813215A (en) | Confocal microscope | |
| CN102955282B (en) | Liquid crystal display device with a light guide plate | |
| US20050152030A1 (en) | Orientation independent differential interference contrast microscopy technique and device | |
| CN202133823U (en) | Dynamic large field small distortion star simulator optical system | |
| US7046436B2 (en) | Arrangement and method for polarization-optical interference contrast | |
| EP3006987A1 (en) | Optical element having polarization dependence on incident light, for varying focused light pattern | |
| CN104197961B (en) | Star simulator based on bifocal optical system | |
| CN105261272A (en) | Refractometer teaching model | |
| CN101952770A (en) | Backlight unit and liquid crystal display device | |
| CN105158214B (en) | A kind of function adhesive plaster membrane permeability tester and its method of testing | |
| TWI677705B (en) | Shearing interference microscope using Salvator as a shear element | |
| CN108195567B (en) | A kind of quality detection device and detection method of sunglasses functional sheet | |
| CN102869971A (en) | Device for demonstrating and testing the efficacy of an antireflection treatment of an ophthalmic lens | |
| CN105700209A (en) | Method and device for measuring liquid crystal azimuth angle of liquid crystal panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20200913 |