CN1052956A - Line focusing system of cylindrical lenses array - Google Patents
Line focusing system of cylindrical lenses array Download PDFInfo
- Publication number
- CN1052956A CN1052956A CN 89109605 CN89109605A CN1052956A CN 1052956 A CN1052956 A CN 1052956A CN 89109605 CN89109605 CN 89109605 CN 89109605 A CN89109605 A CN 89109605A CN 1052956 A CN1052956 A CN 1052956A
- Authority
- CN
- China
- Prior art keywords
- cylindrical lens
- focusing system
- line
- laser
- lens
- 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.)
- Pending
Links
Images
Landscapes
- Laser Beam Processing (AREA)
- Lenses (AREA)
Abstract
The present invention is a kind of line focusing system of cylindrical lenses array, be by same widths d more than two, the same focal length fc, the unit cylindrical lens symmetrical parallel of strip is arranged, the cylindrical lens array that the side gummed forms and a convergent lens are formed, using focusing system of the present invention can obtain thin and grow, light distribution is even, the light focal line that power density is higher, can be used for x-ray laser, the research of X ray plasma, LASER HEAT TREATMENT and extreme physical condition are greater than the high temperature of 1070K with greater than 106 atmospheric hyperbars) the research of substance characteristics.
Description
The present invention is a kind of line focusing system that belongs to optics and laser technology field.It can become beam convergence thin and grow (high aspect ratio), and light distribution is even, and the focal line that rectilinearity is good is particularly suitable for the research of x-ray laser, also be applicable to LASER HEAT TREATMENT and extremely physical condition (greater than 10
7The high temperature of ° K is greater than 10
6Atmospheric hyperbar) research of state of matter.
This class laser rays focusing system, international used at present, mainly contain two kinds: a kind of is to be combined by single-column face lens and a convergent lens, and the place can obtain focal line in the convergent lens focus, connects square smooth hurdle in placing and can obtain the uniform laser focal line of light distribution in light path.For example, that use in the x-ray laser research of U.S. Lorentz lorentz lev More National Laboratory is exactly (the L.G Sappala of this system, Laser Program Annual Report 84 Lawrence Livermore Nafional Laboratory P2-47,48,51).Another kind is to combine with off-axis spherical mirror and a convergent lens.The same light hurdle of a squarish of must placing in light path is to obtain the uniform laser focal line of light distribution.This system is Britain's Rutherford experiment chamber invention and uses (I.N Ross et al JPhys.ESci Instrum Vol 18 1985 P169-172 and Appl Opt Vol 26 No9 P1585-1586).
Above-mentioned two kinds of laser rays focusing systems have a common shortcoming, and that is exactly to connect square smooth hurdle in order to obtain the uniform focal line of light distribution in all must placing in light path, and square smooth hurdle will fall the laser energy that (or claiming to lose) quilt more than 30% is assembled by shelves.Because the laser beam cross section of being assembled generally all is circular, and the light intensity of any point will be decided by on the incident beam perpendicular to the light intensity summation on the corresponding line of focal line length direction on the laser focal line.Therefore, the center section light intensity of focal line length direction is more intense, and near the light intensity that weaken gradually focal line two end points on two limits is zero.In order to make the focal line light distribution even, the method that just must take to insert square smooth hurdle is fallen the uneven part in four limits with shelves.The laser energy of this part that the quilt shelves fall accounts for 30%, and this is very unfortunate.In addition, if the space distribution of light intensity is uneven (more intense as usually said central light strength in the incident laser area of beam, and the gaussian shaped profile that weakens to the edge gradually), also still can not get the uniform laser focal line of light distribution even add square smooth hurdle so.
Its purpose of line focusing system of the present invention is exactly shortcoming and the difficulty in order to overcome said system, invented a kind of both can the generation and carefully grown (high aspect ratio), light distribution is uniform, high-quality laser focal line, can not lose the line focusing system of the laser energy of being assembled again, i.e. line focusing system of cylindrical lenses array.
System of the present invention is with polylith (more than 2) same widths d, the same focal length fc, the unit cylindrical lens symmetry of strip be arranged in parallel a cylindrical lens array that the side gummed forms and a convergent lens composition.Its structural representation is in Fig. 1.Array behind the polylith cylindrical lens gummed can be worn into circle, is equipped with glass circle frame, and the diameter of array can be a bit larger tham by the diameter of convergent beam.When the cross section is incided on the cylindrical lens array of proper alignment for circular light beam, all meet length requirement but the uneven smooth focal line of light distribution with one of convergent lens generation through every block length strip element cylindrical lens.Because the unit cylindrical lens is a symmetric offset spread, though for any one unit cylindrical lens and its light distribution of the formed focal line of convergent lens is uneven, but it is strong and weak on the contrary in the inhomogeneous light distribution of the light focal line that is produced with symmetrical another unit cylindrical lens of this unit cylindrical mirror, both superpose, and the back is mutual to be compensated, and becomes light distribution focal line relatively uniformly.The focal line that all unit cylindrical lens and convergent lenses are produced on the cylindrical lenses array is all in the stack of the focus place of convergent lens like this, its light distribution of focal line after the stack compensates mutually, on average, become one at last and carefully grow, light distribution is desirable light focal line uniformly.Its light path synoptic diagram as shown in Figure 2.
In the line focusing system of cylindrical lenses array of the present invention, the width of each cell stripes cylindrical lens, focal length can design definite as requested.Their mutual relationship is:
L= (D·f)/(n·fc)
Wherein, L: the focal line length of requirement.
D: the bore of the laser beam of being assembled.
F: the focal length of convergent lens.
f
c: the focal length of unit cylindrical lens.
N: the unit cylindrical lens piece number of array.
In general, D, f are known, and L proposes according to experiment or request for utilization, and n should select according to the numerical value of L and D, and the width of unit cylindrical lens should be greater than focal line length usually.I.e. (D/n)＞L, n＞2 wherein, the number of n is big more, and the homogeneity of focal line is good more, but that n is difficult for selecting is too big, otherwise processing difficulty relatively.After n determines, f
cJust can in the hope of, the width D/n of unit cylindrical lens also can in the hope of.If be processed into plano-concave or plano-convex cylindrical lens, cylindrical lens radius-of-curvature recessed or convex surface in unit is about f so
c/ α.Can certainly be processed into concave-concave, the cylindrical lens of forms such as biconvex.
Advantage of the present invention is:
(1) line focusing system of the present invention is because the stack of adopting the polylith cylindrical lens to produce many focal lines, thereby obtains the uniform focal line of light distribution.And make full use of by all light in the convergent beam bore.Thereby do not lose the energy of the incident light of being assembled.
(2) because many focal lines stack average, therefore line focusing system of the present invention reduces greatly to the requirement of the spatial light intensity distributing homogeneity of the light beam assembled.Even under the obvious uneven situation of light beam light intensity space distribution, can obtain the evenly focal line of distribution of light intensity equally.
(3) under same output laser energy, owing to native system fully uses by the convergent laser energy, so the focal line that produces has higher linear power density.
(4) line focusing system of the present invention can reduce by the convergent laser apparatus cost, and this is the direct economy effect of drawing owing to above-mentioned advantage, saves energy, and bottom line can be saved 30% luminous energy.
(5) line focusing system of the present invention can be used for the research of x-ray laser, X ray plasma.Laser Heat Treating in China application and extreme physical condition are (greater than 107 ° of K superhigh temperature, greater than 10
6Atmospheric superelevation air pressure) research of substance characteristics etc.
Description of drawings:
Fig. 1, the cylindrical lens array structural representation
Wherein: 1-cylindrical lens array glass frame.
2-unit cylindrical lens
3-unit cylindrical lens side gummed seam.
Fig. 2, line focusing system of cylindrical lenses array is assembled index path.2-A is the top view sectional view.
2-B is a side cutaway view.
Wherein: 4-is by the converging light light beam.
5-6 unit cylindrical lens array
The 6-convergent lens
7-converges at the incident light focal line at lens focus place.
Fig. 3, the comparison of the focal line curve of light distribution of 6 unit cylindrical lenses array systems and single cylindrical lens system
Wherein, curve 8 is focal line light distribution that single cylindrical lens system produces, and its light distribution is very inhomogeneous.
Curve 9 is light distribution of 6 unit cylindrical lens array focal lines that system produces.
Its light distribution is that the unevenness of light distribution is less than 5% uniformly.
Ordinate I is a relative light intensity numerical value.
Abscissa L is by the distance and position of the focal line length direction of converging light, and unit is mm.
Most preferred embodiment: line focusing system of cylindrical lenses array is given full play to its advantage in the x-ray laser experimental study.
(1) the line focusing system laser focusing light beam of forming with the array of 6 unit plano-concave cylindrical lenses and convergent lens (Fig. 1, Fig. 2).At incoming laser beam bore D=180mm, unit plano-concave cylindrical lens width d=D/6=30mm, concave curvature radius R=260mm, focal distance f
c=520mm, under the condition of the focal distance f=340mm of convergent lens, laser focal line length L=20mm that this system produces, width is about 0.1mm.
The light distribution of focal line as shown in Figure 3, more single cylindrical lens system and 6 focal line curves of light distribution that unit cylindrical lens array system is produced.Obviously, the focal line light distribution of cylindrical lenses array system evenly has obvious superiority.
(2) high power laser light focal line irradiation germanium (Ge) flat target that is produced with 6 unit line focusing system of cylindrical lenses array of the present invention obtains 19.6nm, 23.2nm, 23.6nm, the output of the soft x-ray laser of 24.7nm and 28.6nm wavelength.
Same system produces long high power laser light focal line irradiation silicon (Si) flat target of 20mm, obtains 8.73nm in the world first, the output of the soft x-ray laser of 8.89nm wavelength.
These results prove absolutely the effect that the even power density Gao Suoneng of laser focal line light distribution that this focusing system produces brings.
Claims (3)
1, a kind of line focusing system of cylindrical lenses array, formed by cylindrical lens and convergent lens, it is characterized in that cylindrical lens is by the same widths d more than two, the same curvature radius R, the unit cylindrical lens symmetrical parallel of strip is arranged, the cylindrical lens array that the side gummed forms, its parameter coincidence formula:
L= (D·f)/(n·fc)
L-is a focal line length in the formula, the laser beam bore that D-is assembled,
The focal length of f-convergent lens, the focal length of fc-unit cylindrical lens,
N-is the number of unit cylindrical lens.
2, a kind of line focusing system of cylindrical lenses array according to claim 1 is characterized in that the unit cylindrical lens is plano-concave, plano-convex or concave-concave or lenticular.
3, a kind of line focusing system of cylindrical lenses array according to claim 1 and 2 is characterized in that number n＞2 of unit cylindrical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89109605 CN1052956A (en) | 1989-12-25 | 1989-12-25 | Line focusing system of cylindrical lenses array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89109605 CN1052956A (en) | 1989-12-25 | 1989-12-25 | Line focusing system of cylindrical lenses array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1052956A true CN1052956A (en) | 1991-07-10 |
Family
ID=4858088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89109605 Pending CN1052956A (en) | 1989-12-25 | 1989-12-25 | Line focusing system of cylindrical lenses array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1052956A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0843836B1 (en) * | 1995-08-11 | 1999-06-16 | Société de production et de recherches appliquées | Optical device for homogenising a laser beam |
| CN103336366A (en) * | 2013-06-06 | 2013-10-02 | 西北大学 | Device capable of generating uniform linear laser beams based on high-numerical aperture cylindrical lens focusing |
| CN104766555A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Emergency exit indication board |
| CN104766557A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Emergency exit indication board |
| CN104763963A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Emergency exit indicator light |
| CN104766556A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Indicator light for emergency exit |
-
1989
- 1989-12-25 CN CN 89109605 patent/CN1052956A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0843836B1 (en) * | 1995-08-11 | 1999-06-16 | Société de production et de recherches appliquées | Optical device for homogenising a laser beam |
| CN103336366A (en) * | 2013-06-06 | 2013-10-02 | 西北大学 | Device capable of generating uniform linear laser beams based on high-numerical aperture cylindrical lens focusing |
| CN103336366B (en) * | 2013-06-06 | 2016-04-20 | 西北大学 | The device of uniform line laser beam is produced based on high-NA post lens focus |
| CN104766555A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Emergency exit indication board |
| CN104766557A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Emergency exit indication board |
| CN104763963A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Emergency exit indicator light |
| CN104766556A (en) * | 2014-01-03 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Indicator light for emergency exit |
| CN104766555B (en) * | 2014-01-03 | 2019-10-15 | 深圳市海洋王照明工程有限公司 | Emergency exit sign board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0169872B1 (en) | A laser processing apparatus | |
| KR101842421B1 (en) | Device for applying laser radiation and device for reproducing a linear light distribution | |
| CN1223061C (en) | Laser system | |
| CN1540390A (en) | Light beam eneving device, laser irradiator and mfg. method of semiconductor device | |
| TWI832116B (en) | Device for homogenizing laser light and arrangement of a plurality of such devices | |
| CN101464563B (en) | Device for shaping laser radiation | |
| CN1052956A (en) | Line focusing system of cylindrical lenses array | |
| CN114764156B (en) | Infrared all-dielectric orthogonal cylindrical superlens | |
| CN111487782A (en) | Transmission type shaping mirror group for forming uniform light spots | |
| CN1103059C (en) | Line beam shaping device | |
| CN1934486A (en) | Optical device for generating a beam, especially a laser beam | |
| CN207965371U (en) | A kind of adjustable delustring of Transflective width is dizzy to homogenize optical system | |
| CN101458395A (en) | Light beam shaper by refractometry for two-dimension laminate light source | |
| CN1189669A (en) | Optical system for shaping beam and optical pickup employing the same | |
| CN1033342C (en) | Uniform line focusing optical system with continuously adjustable focal line length | |
| CN1211790A (en) | CD unit | |
| CN108427205A (en) | A kind of adjustable delustring of Transflective width is dizzy to homogenize optical system | |
| KR20210144982A (en) | Lazer device | |
| CN2397509Y (en) | Line Beam Shaper | |
| US5991082A (en) | Lens system with multiple focal lines | |
| CN218675358U (en) | Dodging rod and medical multi-wavelength laser system | |
| CN211956013U (en) | Transmission type shaping mirror group for forming uniform light spots | |
| CN1834709A (en) | High-power semiconductor laser array beam collimation system | |
| JPS58106503A (en) | Refractive index distribution type lens barrel and its manufacture | |
| JPH06196780A (en) | Interface module for horizontal direction energy input to dye laser module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |