EP2054751A1 - Apparatus for homogenizing light and laser apparatus for producing a linear intensity distribution in a work plane - Google Patents
Apparatus for homogenizing light and laser apparatus for producing a linear intensity distribution in a work planeInfo
- Publication number
- EP2054751A1 EP2054751A1 EP07764852A EP07764852A EP2054751A1 EP 2054751 A1 EP2054751 A1 EP 2054751A1 EP 07764852 A EP07764852 A EP 07764852A EP 07764852 A EP07764852 A EP 07764852A EP 2054751 A1 EP2054751 A1 EP 2054751A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser
- lenses
- intensity distribution
- light
- lens array
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0043—Inhomogeneous or irregular arrays, e.g. varying shape, size, height
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/005—Arrays characterized by the distribution or form of lenses arranged along a single direction only, e.g. lenticular sheets
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
- G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
Definitions
- the present invention relates to a device for homogenizing light according to the preamble of claim 1 and to a laser device for producing a linear intensity distribution in a working plane according to the preamble of claim 7.
- Homogenization of light have lens arrays in which a plurality, in particular all of the lenses are different from all other lenses in terms of aperture, focal length and possibly other parameters. By a particular random distribution of these different lenses in the array is a good
- WO 2005/085935 Another device for homogenization is known from WO 2005/085935.
- a plurality of biconvex cylindrical lenses are arranged side by side in a lens array, wherein each of the lenses is the same size and has the same focal length.
- a top hat Such an intensity distribution has, for example, very good homogeneity and very steep flanks.
- the falling flanks may have a defined pitch. This can in Homogenisierern according to the prior art by Defocusing can be achieved. However, the intensity profile generally deteriorates and is difficult to control.
- An application for this purpose are, for example, long, compound lines, as they are to be generated by the laser device mentioned above.
- long laser lines for example greater than 100 mm
- the distance is at least as long as the line is long. In industrial applications, this much space is often not available, especially for line lengths of more than one meter.
- a laser device of the type mentioned is known from US 6,717, 105 B1.
- the laser device described therein comprises a plurality of laser light sources, each associated with an optical means.
- the optical means each form laser beams with a linear intensity distribution from the laser light of the laser light sources, wherein these individual laser beams can be superimposed in a working plane to form a common line-shaped intensity distribution.
- the center distances of the lenses decrease or increase from the inside to the outside.
- the desired radiation characteristic of the homogenizer is realized by a variation of the center distance (pitch), in particular with a simultaneously constant focal length of the individual lenses of the lens array.
- the center distance pitch
- This principle is suitable for one-stage as well as two-stage homogenization, as well as for the use of a monolithic
- the core of the invention is thus a homogenizer, which generates a defined, trapezoidal angular distribution for one or two axes.
- the optical means of the laser device comprise a device according to the invention for homogenization.
- Fig. 1 is a perspective view of an inventive
- FIG. 2a shows a side view of a first embodiment of a device according to the invention for the homogenization of light
- FIG. 2b shows a side view of a second embodiment of a device according to the invention for the homogenization of light
- FIG. 4 shows an intensity distribution which can be achieved with a laser device according to the invention in arbitrary units.
- FIG. 1 The basic principle of a laser device according to the invention is shown in FIG.
- On display are seven laser modules 1 with similar, but not necessarily the same beam profile that illuminate a Optikmod ul.
- seven optical means 2 are included for beam shaping, each generating laser light 3 with an at least partially line-shaped intensity distribution.
- the special feature is that through the use of inventive
- the laser modules 1, which illuminate that Optikmod ul, can be easily replaced due to the vast independence of the optical module from the input beam.
- Fig. 2a shows a device according to the invention for
- the lenses 6 are formed as cylindrical lenses with cylinder axes in the Y direction. It can be clearly seen that the pitch P 1 , P 2 of the lenses 6 in the center of the lens array 5 is smaller than at the edge. This is achieved in that the width of the lenses 6 in the X direction (see coordinate system shown), in which they are arranged side by side, increases from the center outwards. Alternatively, there is a possibility that the center distance decreases from the center to the outside.
- the focal length of the lenses 6 is the same for all the lenses 6.
- the focal length f ⁇ of the rear refractive surfaces in the Z direction may correspond to the thickness of the lenses 6 in the Z direction or in the propagating direction of the homogenizing light.
- Fig. 2b shows a two-stage device according to the invention for the homogenization of light.
- This comprises two lens arrays 7, 8, each having a plurality of lenses 9, 1 0. Again, take the center distance P 1 , P 2 of the lenses 7, 8 from the center outwards. Alternatively, there is also the possibility that the center distance decreases from the center to the outside.
- the focal length of the lenses for all lenses 9 on the first lens array 7 and / or for all lenses 10 on the second lens array 8 is the same.
- the focal length fio of the Z-direction rear refractive surfaces may correspond to the distance of the lenses 9 to the lenses 10 in the Z direction.
- a plurality of cylindrical lenses with cylinder axes can then be arranged in the X direction, for example on the mutually facing sides of the lens arrays 7, 8 according to FIG. 2b.
- These cylindrical lenses can be a corresponding from the
- FIG. 3 shows that with such a device for homogenization, an intensity profile can be generated which has a central region of constant intensity and two edge regions with linearly decreasing intensity.
- a defined, trapezoidal angular distribution for one or two axes can be generated.
- This principle is suitable for one-stage as well as for a two-stage homogenization, as well as for the use of a monolithic homogenizer.
- FIG. 4 shows a simulation result for the laser device. Two lines of the laser light 3 with trapezoidal intensity distribution, each 190 mm in length, are combined to form a linear intensity distribution 4. The homogeneity thereby achieved is about 96% or about + 1-2%.
- flanks with constant slope of the intensity distribution of the individual lines of the laser light 3 can thus be superimposed optimally in the working plane to a linear intensity distribution 4.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006032657 | 2006-07-13 | ||
DE102006033069 | 2006-07-14 | ||
PCT/EP2007/005626 WO2008006460A1 (en) | 2006-07-13 | 2007-06-26 | Apparatus for homogenizing light and laser apparatus for producing a linear intensity distribution in a work plane |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2054751A1 true EP2054751A1 (en) | 2009-05-06 |
Family
ID=38521011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07764852A Withdrawn EP2054751A1 (en) | 2006-07-13 | 2007-06-26 | Apparatus for homogenizing light and laser apparatus for producing a linear intensity distribution in a work plane |
Country Status (5)
Country | Link |
---|---|
US (1) | US8395844B2 (en) |
EP (1) | EP2054751A1 (en) |
JP (1) | JP2009543143A (en) |
KR (1) | KR20090029748A (en) |
WO (1) | WO2008006460A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009021251A1 (en) | 2009-05-14 | 2010-11-18 | Limo Patentverwaltung Gmbh & Co. Kg | Device for shaping laser radiation and laser device with such a device |
US8946594B2 (en) * | 2011-11-04 | 2015-02-03 | Applied Materials, Inc. | Optical design for line generation using microlens array |
KR101815839B1 (en) | 2012-09-24 | 2018-01-08 | 리모 파텐트페어발퉁 게엠베하 운트 코. 카게 | Device for generating a linear intensity distribution of a laser beam in a working plane |
JP6175761B2 (en) * | 2012-12-03 | 2017-08-09 | セイコーエプソン株式会社 | Electro-optical device and electronic apparatus |
JP5884743B2 (en) * | 2013-01-30 | 2016-03-15 | ソニー株式会社 | Illumination device and display device |
US20180195693A1 (en) * | 2015-05-15 | 2018-07-12 | Sony Corporation | Light source device, illumination apparatus, and projector |
JP7311746B2 (en) * | 2019-01-31 | 2023-07-20 | 日亜化学工業株式会社 | Lens array and illumination optical device |
CN111505749B (en) * | 2019-01-31 | 2023-08-15 | 日亚化学工业株式会社 | Lens array and illumination optical device |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0424712A (en) * | 1990-05-15 | 1992-01-28 | Matsushita Electric Ind Co Ltd | Two-dimensional lens array and neural network circuit |
JP2788791B2 (en) * | 1991-01-08 | 1998-08-20 | 三菱電機株式会社 | Fly-eye lens device and illumination device including the fly-eye lens device |
JP2974099B2 (en) * | 1992-12-14 | 1999-11-08 | 株式会社日立製作所 | Transmission type liquid crystal panel and projection type liquid crystal display |
JPH10253916A (en) * | 1997-03-10 | 1998-09-25 | Semiconductor Energy Lab Co Ltd | Laser optical device |
JP2001056435A (en) | 1999-08-18 | 2001-02-27 | Mitsubishi Electric Corp | Projection type display device |
JP2002141301A (en) | 2000-11-02 | 2002-05-17 | Mitsubishi Electric Corp | Optical system for laser annealing and laser annealing apparatus using the same |
DE10136611C1 (en) * | 2001-07-23 | 2002-11-21 | Jenoptik Laserdiode Gmbh | Optical device, for laser light emitted by laser diode device, has collimation optical element and homogenizing element using multiple reflection of laser beam |
US6750423B2 (en) | 2001-10-25 | 2004-06-15 | Semiconductor Energy Laboratory Co., Ltd. | Laser irradiation method, laser irradiation apparatus, and method of manufacturing a semiconductor device |
TWI289896B (en) | 2001-11-09 | 2007-11-11 | Semiconductor Energy Lab | Laser irradiation apparatus, laser irradiation method, and method of manufacturing a semiconductor device |
US7113527B2 (en) | 2001-12-21 | 2006-09-26 | Semiconductor Energy Laboratory Co., Ltd. | Method and apparatus for laser irradiation and manufacturing method of semiconductor device |
US6984573B2 (en) | 2002-06-14 | 2006-01-10 | Semiconductor Energy Laboratory Co., Ltd. | Laser irradiation method and apparatus |
US6859326B2 (en) | 2002-09-20 | 2005-02-22 | Corning Incorporated | Random microlens array for optical beam shaping and homogenization |
US7186004B2 (en) | 2002-12-31 | 2007-03-06 | Karlton David Powell | Homogenizing optical sheet, method of manufacture, and illumination system |
EP3358501B1 (en) | 2003-07-18 | 2020-01-01 | Canon Kabushiki Kaisha | Image processing device, imaging device, image processing method |
CA2552731C (en) * | 2004-01-08 | 2010-06-29 | Yin S. Tang | Microlens arrays |
US6950239B2 (en) * | 2004-01-08 | 2005-09-27 | Tang Yin S | Method for making micro-lens array |
WO2005085935A1 (en) * | 2004-03-06 | 2005-09-15 | Hentze-Lissotschenko Gmbh & Co. Kg | Device for homogenizing light and arrangement for illuminating or focussing with said device |
US7422988B2 (en) | 2004-11-12 | 2008-09-09 | Applied Materials, Inc. | Rapid detection of imminent failure in laser thermal processing of a substrate |
KR20070090246A (en) | 2004-12-22 | 2007-09-05 | 칼 짜이스 레이저 옵틱스 게엠베하 | Optical illumination system for creating a line beam |
JP4665630B2 (en) * | 2005-07-05 | 2011-04-06 | 株式会社日立製作所 | Projection-type image display device and optical integrator |
-
2007
- 2007-06-26 JP JP2009518741A patent/JP2009543143A/en active Pending
- 2007-06-26 WO PCT/EP2007/005626 patent/WO2008006460A1/en active Application Filing
- 2007-06-26 US US12/373,432 patent/US8395844B2/en not_active Expired - Fee Related
- 2007-06-26 EP EP07764852A patent/EP2054751A1/en not_active Withdrawn
- 2007-06-26 KR KR1020087031886A patent/KR20090029748A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2008006460A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20110051253A1 (en) | 2011-03-03 |
KR20090029748A (en) | 2009-03-23 |
US8395844B2 (en) | 2013-03-12 |
WO2008006460A1 (en) | 2008-01-17 |
JP2009543143A (en) | 2009-12-03 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20090213 |
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Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: STEINBRUECK, TORSTEN Inventor name: SEBASTIAN, HEIKO Inventor name: BAYER, ANDREAS Inventor name: MITRA, THOMAS |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LIMO PATENTVERWALTUNG GMBH & CO. KG |
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DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LIMO PATENTVERWALTUNG GMBH & CO. KG |
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17Q | First examination report despatched |
Effective date: 20141125 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20150409 |