WO2005103795A1 - Vorrichtung und verfahren zur optischen strahlhomogenisierung - Google Patents
Vorrichtung und verfahren zur optischen strahlhomogenisierung Download PDFInfo
- Publication number
- WO2005103795A1 WO2005103795A1 PCT/EP2005/003751 EP2005003751W WO2005103795A1 WO 2005103795 A1 WO2005103795 A1 WO 2005103795A1 EP 2005003751 W EP2005003751 W EP 2005003751W WO 2005103795 A1 WO2005103795 A1 WO 2005103795A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- elements
- lens elements
- section
- cross
- lens
- Prior art date
Links
- 238000000265 homogenisation Methods 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 15
- 230000000694 effects Effects 0.000 claims abstract description 10
- 230000000295 complement effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 5
- 238000003491 array Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
-
- 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
-
- 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
-
- 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
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
-
- 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
- G02B27/0905—Dividing and/or superposing multiple light beams
-
- 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
- G02B27/0961—Lens arrays
-
- 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
- G02B27/0966—Cylindrical lenses
-
- 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
- G02B27/0977—Reflective elements
- G02B27/0983—Reflective elements being curved
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/10—Mirrors with curved faces
Definitions
- a device and a method of the type mentioned at the outset are known from US Pat. No. 6,239,913 B1.
- the device described therein has a transparent substrate, in which arrays of cylindrical lenses are arranged both on a light entry surface and on a light exit surface.
- the arrays of cylindrical lenses have mutually perpendicular cylindrical axes.
- the individual cylindrical lenses can have a spherical or else an aspherical cross-section of the second order.
- collimated laser radiation is guided through the device and, following the device, brought together into a working plane by means of a converging lens serving as a Fourier lens.
- the light refracted by the individual cylindrical lens elements becomes superimposed in the working plane by means of the Fourier lens in such a way that the original laser radiation is homogenized.
- the lens elements or the mirror elements each have one in their edge regions Have curvature that diffraction-related effects are reduced.
- the effects to be avoided are predominantly effects which are similar to edge diffraction effects, whereby such edge diffraction effects can be changed, in particular smeared, by the change in the edge region according to the invention, in particular such that the intensity fluctuation of the light distribution which has passed through a single lens element or that of an individual mirror element reflected light distribution can be greatly reduced.
- Devices according to the invention are suitable for a wide spectral range from the far infrared to the X-ray range.
- the use of mirror elements instead of lens elements has proven to be extremely useful.
- optically functional interface for example two or four.
- the lens or mirror elements of all or only individual optically functional interfaces can then be changed such that a better homogenization of the light is achieved.
- the method according to claim 8 is characterized by the following method steps: a device for optical beam homogenization with at least one optically functional interface and a plurality of lens elements or mirror elements on the optically functional interface is produced; the light distribution of light passing through a single one of the plurality of lens elements or light reflected by a single one of the plurality of mirror elements is determined; a structure that is complementary to the determined light distribution is applied to each of the lens elements or the mirror elements.
- the structure applied has a greater amplitude in the edge regions of the lens elements or the mirror elements than in the central region of the lens elements or the mirror elements.
- the lens elements or mirror elements produced in the first method step can have a regular cross-section, in particular a spherical or aspherical cross-section of the second order.
- the lens elements or mirror elements produced in the first method step can thus be produced using simple means.
- the complementary structure applied to the lenses or mirrors after determination of the light distribution can be adapted with the corresponding manufacturing outlay exactly to the diffraction-related disturbance of the light distribution to be expected such that the light passing through a device for homogenization with such a structure has a very uniform light distribution after passing through or has a very uniform light distribution after reflection on the device when using corresponding mirror elements.
- FIG. 1 a shows a schematic side view of a device according to the invention
- FIG. 3 schematically shows the light distribution of light which has passed through a lens element of the device according to the invention
- FIG. 4 shows the cross section of a single convex lens element of a device according to the invention in comparison to a single lens element according to the prior art
- FIG. 5 shows a detailed view of the edge region of the cross section of the lens element of the device according to the invention according to FIG. 4;
- FIG. 6 shows the cross section of a further embodiment of a concave lens element of a device according to the invention
- Fig. 7 is a detailed view of the cross section according to FIG. 1 showing the edge of the lens element. 6;
- FIG. 8 schematically shows the light distribution of light that has passed through the lens element according to FIG. 6.
- the invention is described below using the example of lens elements through which light to be homogenized passes.
- the mirror elements that can also be used according to the invention for homogenization can be designed similarly or exactly like the lens elements, with the difference that they are at least partially reflective for the wavelength of the light to be homogenized.
- the lens elements described below could be provided with a corresponding reflective coating.
- the light to be homogenized can then be reflected, for example, at the individual mirror elements at an angle other than zero.
- Cartesian coordinate systems are shown for better clarification of the device according to the invention.
- FIGS. 1 a and 1 b schematically show an exemplary embodiment of a device according to the invention for optical beam homogenization.
- FIGS. 1 a and 1 b show a substrate 1 made of a transparent material with an entry surface 2 and an exit surface 3 for light.
- a large number of lens elements 4 arranged parallel to one another are provided on the entrance surface 2 and are designed as cylindrical lenses.
- the cylinder axes of these cylindrical lenses extend in the Y direction.
- a plurality of lens elements 5 are also arranged on the exit surface 3 are also designed as parallel and spaced-apart cylindrical lenses.
- the cylinder axes of the lens element 5 extend in the X direction and are thus aligned perpendicular to the cylinder axes of the lens elements 4.
- the crossed lens elements 4, 5 designed as cylindrical lenses, when light passes through the entrance surface 2 and the exit surface 3, the light rays that have passed are refracted both in the X direction and in the Y direction, so that the lens elements 4, 5 are in their Interaction has a similar effect as a large number of spherical lens elements.
- the lens or mirror elements arranged next to one another can alternately be concave and convex on one or each of the optically functional interfaces in order to avoid losses in the transition region between individual lens or mirror elements.
- FIGS. 1 a and 1 b the expansion of the lens element in the Z direction is plotted (see FIGS. 1 a and 1 b).
- the abscissa of the graphic according to FIG. 4 shows the X coordinate of the lens element in millimeters, the 0 being arranged in the center of the cross section of the lens element.
- the graph according to FIG. 4 shows that the deviation of the cross section 7 of the lens element of the device according to the invention from the parabolic cross section 6 according to the prior art becomes noticeable for X values dietaryirri -0.4 mm or> 0.4 mm.
- FIG. 7 shows a second embodiment of a lens element 4, 5 of a device according to the invention.
- FIG. 7 in particular shows that this embodiment also has a sharp increase in curvature in its edge region.
- 8 shows the light distribution of light that has passed through such a lens element 4, 5 in intensity as a function of the exit angle. The light distribution shows hardly noticeable fluctuations in intensity for different exit angles, which can also be attributed here to the special shape of the lens element 4, 5 in its edge region.
- essentially regularly structured lenses with, for example, second-order Ashary cross-section can be used.
- a fine, in particular wavy or sinusoidal structure is impressed on all the lens elements here.
- the periodicity of this structure is smaller, in particular small compared to the periodicity with which the individual lens elements 4, 5 are arranged side by side on the entrance surface 2 or the exit surface 3.
- a structure is applied to the individual lens elements 4, 5 that is complementary to a disturbance, as is shown, for example, in FIG. 2.
- a substrate is provided with lens elements which have a regular cross section, such as a spherical or an aspherical cross section of the second order exhibit.
- the light distribution of light passing through such a lens element is determined.
- Such a light distribution could, for example, correspond to the light distribution according to FIG. 2.
- either the already existing lens elements are changed in such a way that they have a structure that is complementary to the disturbance shown, for example, in FIG. 2, or else new lens elements are generated in a new substrate or in the same substrate, ie they have a cross section, the one with, for example, Fig. 2 complementary structure is provided.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007509910A JP4875609B2 (ja) | 2004-04-26 | 2005-04-09 | 光ビーム均一化のための装置および方法 |
EP05716566A EP1743204A1 (de) | 2004-04-26 | 2005-04-09 | Vorrichtung und verfahren zur optischen strahlhomogenisierung |
KR1020067022114A KR101282582B1 (ko) | 2004-04-26 | 2005-04-09 | 광 빔 균일화 장치 및 방법 |
US11/589,270 US20070127131A1 (en) | 2004-04-26 | 2006-10-26 | Device and method for homogenizing optical beams |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004020250A DE102004020250A1 (de) | 2004-04-26 | 2004-04-26 | Vorrichtung und Verfahren zur optischen Strahlhomogenisierung |
DE102004020250.8 | 2004-04-26 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/589,270 Continuation US20070127131A1 (en) | 2004-04-26 | 2006-10-26 | Device and method for homogenizing optical beams |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005103795A1 true WO2005103795A1 (de) | 2005-11-03 |
Family
ID=34963661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/003751 WO2005103795A1 (de) | 2004-04-26 | 2005-04-09 | Vorrichtung und verfahren zur optischen strahlhomogenisierung |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070127131A1 (de) |
EP (1) | EP1743204A1 (de) |
JP (1) | JP4875609B2 (de) |
KR (1) | KR101282582B1 (de) |
CN (1) | CN100465698C (de) |
DE (1) | DE102004020250A1 (de) |
WO (1) | WO2005103795A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2101201A1 (de) * | 2008-02-21 | 2009-09-16 | LIMO Patentverwaltung GmbH & Co. KG | Vorrichtung zur Aufteilung eines Lichtstrahls |
WO2012095422A3 (de) * | 2011-01-10 | 2012-09-07 | Limo Patentverwaltung Gmbh & Co. Kg | Vorrichtung zur umwandlung des profils einer laserstrahlung in laserstrahlung mit einer rotationssymmetrischen intensitätsverteilung |
WO2014053562A1 (en) * | 2012-10-04 | 2014-04-10 | Lemoptix Sa | An optical assembly |
EP3059630A1 (de) * | 2015-02-19 | 2016-08-24 | VITRONIC Dr.-Ing. Stein Bildverarbeitungssysteme GmbH | Beleuchtungseinheit für Codelesegeräte |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2008087008A1 (de) * | 2007-01-15 | 2008-07-24 | Limo Patentverwaltung Gmbh & Co. Kg | Vorrichtung zur formung eines lichtstrahls |
DE102008027231B4 (de) * | 2008-06-06 | 2016-03-03 | Limo Patentverwaltung Gmbh & Co. Kg | Vorrichtung zur Strahlformung |
KR101606792B1 (ko) * | 2009-06-16 | 2016-03-28 | 엘지전자 주식회사 | 투사 표시 장치 |
CN102454939A (zh) * | 2010-10-30 | 2012-05-16 | 东莞市松毅电子有限公司 | 一种区域光源匀光透镜组 |
CN102590899A (zh) * | 2011-01-04 | 2012-07-18 | 三炬富工业股份有限公司 | 均光透镜 |
EP2812147A1 (de) * | 2012-02-10 | 2014-12-17 | LIMO Patentverwaltung GmbH & Co. KG | Vorrichtung zur laserbearbeitung einer oberfläche eines werkstücks oder zur nachbehandlung einer beschichtung auf der aussenseite oder der innenseite eines werkstücks |
DE102012205790B4 (de) * | 2012-04-10 | 2015-02-05 | Carl Zeiss Smt Gmbh | Vorrichtung zur Homogenisierung von Laserstrahlung sowie Verfahren zu ihrer Herstellung |
CN203069871U (zh) * | 2012-11-13 | 2013-07-17 | 深圳市华星光电技术有限公司 | 聚光装置及修补机 |
DE102013102553B4 (de) | 2013-03-13 | 2020-12-03 | LIMO GmbH | Vorrichtung zur Homogenisierung von Laserstrahlung |
GB2512323B (en) * | 2013-03-26 | 2017-11-01 | Wellburn Daniel | Laser beam intensity profile modulator for top hat beams |
CN106016177A (zh) * | 2016-05-20 | 2016-10-12 | 深圳磊明科技有限公司 | 一种波纹板透镜及照明装置 |
NL2017493B1 (en) * | 2016-09-19 | 2018-03-27 | Kulicke & Soffa Liteq B V | Optical beam homogenizer based on a lens array |
DE102017217145A1 (de) * | 2017-09-27 | 2019-03-28 | Trumpf Laser Gmbh | Lasersystem und Verfahren zur Erzeugung eines Top-Hat- angenäherten Strahlprofils |
WO2019182073A1 (ja) * | 2018-03-20 | 2019-09-26 | Agc株式会社 | ホモジェナイザ、照明光学系および照明装置 |
CN113296277A (zh) * | 2020-02-24 | 2021-08-24 | 宁波激智科技股份有限公司 | 一种准直膜、及一种减干涉准直膜及其制备方法 |
AT524205B1 (de) * | 2021-01-07 | 2022-04-15 | Lenhardt Jakob | Spiegelvorrichtung |
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Publication number | Priority date | Publication date | Assignee | Title |
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US6239913B1 (en) | 1997-03-10 | 2001-05-29 | Semiconductor Energy Laboratory Co., Ltd. | Laser optical apparatus |
WO2003016963A2 (de) | 2001-08-17 | 2003-02-27 | Hentze-Lissotschenko Patentverwaltungs Gmbh & Co. Kg | Anordnung und vorrichtung zur optischen strahlhomogenisierung |
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US4078854A (en) * | 1971-10-05 | 1978-03-14 | Canon Kabushiki Kaisha | Stereo imaging system |
AU553164B2 (en) * | 1980-10-31 | 1986-07-03 | Allergan Humphrey | Objective refractor for the eye |
US4733944A (en) * | 1986-01-24 | 1988-03-29 | Xmr, Inc. | Optical beam integration system |
CN1033342C (zh) * | 1993-12-21 | 1996-11-20 | 中国科学院上海光学精密机械研究所 | 焦线长度连续可调的均匀线聚焦光学系统 |
DE19915000C2 (de) * | 1999-04-01 | 2002-05-08 | Microlas Lasersystem Gmbh | Vorrichtung und Verfahren zum Steuern der Intensitätsverteilung eines Laserstrahls |
CN2456011Y (zh) * | 2000-12-08 | 2001-10-24 | 中国科学院长春光学精密机械与物理研究所 | 均匀高效小相对孔径的照明光学系统 |
JP2002182003A (ja) * | 2000-12-14 | 2002-06-26 | Canon Inc | 反射防止機能素子、光学素子、光学系および光学機器 |
GB2390327B (en) * | 2002-07-01 | 2005-11-16 | Essilor Int | Process for making a mold piece having a main curved surface bearing a utilitary microstructure |
US6859326B2 (en) * | 2002-09-20 | 2005-02-22 | Corning Incorporated | Random microlens array for optical beam shaping and homogenization |
-
2004
- 2004-04-26 DE DE102004020250A patent/DE102004020250A1/de not_active Withdrawn
-
2005
- 2005-04-09 KR KR1020067022114A patent/KR101282582B1/ko active IP Right Grant
- 2005-04-09 JP JP2007509910A patent/JP4875609B2/ja active Active
- 2005-04-09 WO PCT/EP2005/003751 patent/WO2005103795A1/de not_active Application Discontinuation
- 2005-04-09 CN CNB2005800131435A patent/CN100465698C/zh active Active
- 2005-04-09 EP EP05716566A patent/EP1743204A1/de not_active Withdrawn
-
2006
- 2006-10-26 US US11/589,270 patent/US20070127131A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6239913B1 (en) | 1997-03-10 | 2001-05-29 | Semiconductor Energy Laboratory Co., Ltd. | Laser optical apparatus |
WO2003016963A2 (de) | 2001-08-17 | 2003-02-27 | Hentze-Lissotschenko Patentverwaltungs Gmbh & Co. Kg | Anordnung und vorrichtung zur optischen strahlhomogenisierung |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2101201A1 (de) * | 2008-02-21 | 2009-09-16 | LIMO Patentverwaltung GmbH & Co. KG | Vorrichtung zur Aufteilung eines Lichtstrahls |
US8587868B2 (en) | 2008-02-21 | 2013-11-19 | Limo Patentverwaltung Gmbh & Co. Kg | Device for splitting a light beam |
WO2012095422A3 (de) * | 2011-01-10 | 2012-09-07 | Limo Patentverwaltung Gmbh & Co. Kg | Vorrichtung zur umwandlung des profils einer laserstrahlung in laserstrahlung mit einer rotationssymmetrischen intensitätsverteilung |
WO2014053562A1 (en) * | 2012-10-04 | 2014-04-10 | Lemoptix Sa | An optical assembly |
US10502870B2 (en) | 2012-10-04 | 2019-12-10 | North Inc. | Optical assembly |
EP3059630A1 (de) * | 2015-02-19 | 2016-08-24 | VITRONIC Dr.-Ing. Stein Bildverarbeitungssysteme GmbH | Beleuchtungseinheit für Codelesegeräte |
US10174907B2 (en) | 2015-02-19 | 2019-01-08 | Vitronic Dr.-Ing. Stein Bildverarbeitungssysteme Gmbh | Lighting device for a code reader |
Also Published As
Publication number | Publication date |
---|---|
CN100465698C (zh) | 2009-03-04 |
US20070127131A1 (en) | 2007-06-07 |
DE102004020250A1 (de) | 2005-11-10 |
KR20070018918A (ko) | 2007-02-14 |
JP4875609B2 (ja) | 2012-02-15 |
CN1947053A (zh) | 2007-04-11 |
EP1743204A1 (de) | 2007-01-17 |
KR101282582B1 (ko) | 2013-07-04 |
JP2007534991A (ja) | 2007-11-29 |
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