EP1894050A1 - Beleuchtungsvorrichtung, insbesondere für mikroskope - Google Patents
Beleuchtungsvorrichtung, insbesondere für mikroskopeInfo
- Publication number
- EP1894050A1 EP1894050A1 EP06754496A EP06754496A EP1894050A1 EP 1894050 A1 EP1894050 A1 EP 1894050A1 EP 06754496 A EP06754496 A EP 06754496A EP 06754496 A EP06754496 A EP 06754496A EP 1894050 A1 EP1894050 A1 EP 1894050A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- individual light
- light sources
- lighting device
- source
- illumination
- 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- Withdrawn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
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
Definitions
- the present invention relates to a controllable microscope illumination within a microscope system, with which all in contrast microscopy contrasting can be realized.
- high-pressure lamps and halogen lamps are used as conventional microscope illuminators. Due to the lack of controllability in terms of brightness and color temperature / color additional optical components, such as filters, attenuators, etc. are necessary for the control of the output signal of the light source. Another important feature is the given geometry of the light sources used, which usually requires an additional optics for shaping the light beam. Although all contrasting methods can be realized in microscopy by means of these light sources, the effort required for this is usually considerable.
- An illumination device for flexible design of the illumination structures customary for microscopes is described in US Pat. No. 4,852,985 A.
- Semiconductor light sources such as, for example, LEDs arranged in two dimensions, are used as the illumination source.
- the realization of the various lighting structures is carried out by targeted activation of the required LEDs.
- a device for adjusting the brightness may be present.
- the area light source can also be designed by the two-dimensional arrangement of LEDs that emit different colors, such as red, green and blue (RGB). In order to produce the most uniform possible color impression in the object plane without color fringes, the arrangement of the individual colors on the array is of great importance.
- RGB red, green and blue
- US 4,852,985 A describes a variant of this defined arrangement of LEDs for a 3-color array.
- a ground glass is required, which is placed in front of the surface light source.
- the disadvantage of the LED-based RGB illumination for microscopy according to the prior art is that the spectral distribution does not cover the entire visual range, but this is necessary for the color-accurate representation of microscopic samples.
- US Pat. No. 6,369,939 B1 likewise describes a lighting device for a microscope, which provides for the use of LEDs.
- two light sources are arranged in the illumination beam path to achieve an optimized geometric light flux, wherein the second light source is located in a central bore of the collector lens.
- the light of the first light source is focused via lenses and collector lenses in the object plane.
- This type of illumination is used for small field and large aperture lenses.
- the second light source illuminates the object plane according to the Köhler principle with a parallel beam.
- This type of illumination is used for large field and small aperture lenses.
- one or the other light source is used to illuminate the object plane.
- the disadvantage of this solution is that the second light source is limited in its size and thus intensity.
- a transmitted-light illumination unit for microscopes in which a transparent microscope stage is illuminated from below, is described in DE 199 19 096 A1.
- the lighting unit consisting of one or more LEDs is designed such that it can be arranged both in the aperture diaphragm plane and in front of a Köhler illumination optics.
- suitable scattering means are arranged in front of the LEDs.
- Incident light illumination for microscopes in which a ring carrier oriented around the optical axis is present for accommodating illuminants, is described in EP 1 150 154 B1.
- Light-emitting semiconductor diodes (LEDs) which are arranged in a plurality of concentric ring rows in the ring carrier, are also used here as illumination means.
- the main beam direction of the LEDs are directed towards the optical axis, with the longitudinal axes of the LEDs of a row of rings intersecting at or near the optical axis (system axis).
- the preferably designed as white light diodes LEDs are controllable in groups and adjustable in their brightness. With the incident light illumination described, dynamic lighting variants can also be realized.
- the epi-illumination device is in this case integrated into a stereoscopic surgical microscope, wherein the light generated by at least one LED is imaged coaxially to the microscope beam path via the main objective or an additional illumination optics in the object field.
- Both variants according to the Köhler principle and according to the non-Köhler principle can be realized, wherein white light LEDs or combinations of different colored LEDs, such as red-green-blue combination can be used.
- WO 2004/086 117 A1 also describes an arrangement for illuminating objects with light of different wavelengths, which provides for the use of LED light sources.
- a rotatable receiving device is in this case provided with holders for receiving at least one LED. By rotating the recording device different LEDs are positioned in front of a light exit opening. Again, both white light LEDs or combinations of different colored LEDs, such as red-green-blue combination can be used.
- US Pat. No. 5,489,771 A describes an LED light standard for photographic and video microscopy. In this calibration system, the intensity of a compact LED light source is controlled by a detector.
- a diffuser arranged in front of the LED light source ensures, in addition to ensuring high light homogeneity, that part of the light radiation falls on the laterally arranged detector and can be evaluated.
- the light intensities generated can be set very precisely in this standard light source which can be used for calibration, in that the energy supplied to the LEDs can be constantly adjusted to the detector via the control circuit.
- the compact LED light source preferably consists of differently colored LEDs (RGG or RGB), which can be controlled individually. By selective control of the LEDs and the use of bandpass filters monochromatic light can be generated. The generation of pulse-modulated light requires that the camera and / or video camera be synchronized accordingly.
- the present invention has for its object an electronically switchable, adjustable in brightness, optionally different colors or additively the color white with all components of the white light performing, over the illuminated field homogeneous lighting device to provide.
- the intensity should be so great that all the contrasting methods that are essential in microscopy are possible with the illumination device.
- the illumination device in particular for microscopes, consists in this case of a plurality of individually controllable light-emitting semiconductor diodes (LED) which can be regulated in their brightness, and illumination optics which are arranged in or near the illumination beam path of the microscope. Turblendenebene is arranged.
- the light cones of the LEDs used have small opening angles and are in the form of unit cells, which fill a carrier surface over the entire surface, homogeneously.
- illumination variants can be generated for all the contrasting techniques that are essential in microscopy.
- FIG. 1a the unit cells and a LED array for 4 colors
- FIG. 1 b the unit cells and a LED array for 5 colors
- FIG. 1c the unit cells and a LED array for 6 colors
- FIG. 2a shows an arrangement of a unit cell for 4 sources and the corresponding microlens array
- FIG. 2b shows the arrangement with microlens array according to FIG. 2a in the illumination beam path of a microscope
- Figure 3 the beam path for a three-dimensional LED array with the corresponding intensity distribution in the object plane
- Figure 4 the beam path for a two-dimensional LED array with the corresponding intensity distribution in the object plane.
- the illumination device in particular for microscopes, consists of a plurality of individual light sources which can be regulated in their brightness, wherein these individual light sources are designed in the form of unit cells and form a luminous area by periodic arrangement.
- the luminous surface formed by the individual light sources may have a flat, conical, convex or concave shape.
- the individual light sources receiving support surface is preferably mirrored.
- the unit cell describes the smallest at least 2-dimensional arrangement of light sources from which an at least 2-dimensional surface can be filled by periodic arrangement.
- the unit cells consist of a compact arrangement of more than three, preferably four to six individual light sources with at least two different colors. In special cases, single light sources of the same color can also be used.
- the unit cells must be as compact as possible and as close as possible to the surface. The goal here is that the color impression even with increasing magnification, d. H. diminishing, considered object field, always the same remains and that the luminance is sufficient even for high magnifications.
- the unit cell consists of a compact arrangement of four to six different color radiating, individual light sources in which each individual light sources only exists once
- unit cells from a compact arrangement of four to six, emitting different colors To use single light sources where each single light source is duplicated.
- the larger unit cell consists essentially of two "small" unit cells, one of these unit cells having a mirrored arrangement of the individual light sources.
- FIG. 1a shows the unit cells A and A 'as well as the filled luminous areas for four individual light sources 1, 2, 3 and 4, which preferably emit light of different color. In a particular embodiment can in each case emit two individual light sources 1, 3 and 2, 4 light of the same color.
- FIG. 1b shows the unit cells B and B 'as well as the filled luminous areas for five individual light sources 1, 2, 3, 4 and 5, the unit cells C and C and the filled luminous areas for six individual light sources 1, 2, 3, 4 are shown in FIG. 1c , 5 and 6 are shown.
- FIGS. 1a to 1c are intended to show how the individual light sources radiating different colors are to be arranged in a unit cell in order to achieve illumination of the object plane which is as homogeneous as possible in terms of color and intensity.
- FIGS. 1a to 1c show theoretical arrangements for unit cells and filled luminous areas
- FIG. 2a shows a real, as dense arrangement as possible, a unit cell A consisting of four individual light sources, wherein each individual light source 1, 2, 3 and 4 is preceded by an imaging optic , Corresponding microlenses 7, which are designed as a microlens array 10 and are arranged in front of the unit cell A, serve as imaging optics.
- FIG. 2 b shows the arrangement of the unit cell A with microlens array 10 according to FIG. 2 a in the illumination beam path of a microscope and is intended to illustrate the mode of action of a microlens array 10 serving as imaging optics.
- the individual light sources are in the form of the source surfaces 8 produced by them whose images 9 are magnified by the microlens array 10.
- the images 9 of the source surface 8 generated by the individual light sources are magnified by the microlens array 10 so that the images 9 touch the source surfaces 8 of adjacent individual light sources.
- at least one individual light source is decentered with respect to the optical axis 12 of the imaging optics. This can ensure that the touching images 9 of the swelling surfaces 8 form a closed surface. Any existing gaps 11 can thus be closed.
- microlens arrays which are ideally located in or near a conjugate field diaphragm plane, serve primarily for homogenization
- imaging optics which are arranged directly in front of the individual light sources have a completely different mode of action. Through this, an enlarged image whose source surface is first generated in each case for each individual light source. Ideally, these swelling surfaces should touch and thus ideally increase the effective fill factor from well below 1 to 1. In this case, the fill factor is the ratio of luminous area to carrier area.
- the source surfaces 8 generated by the individual light sources are enlarged by the microlens array 10 and supplied to the illumination beam path of the microscope by suitable imaging optics 13.
- a further advantageous embodiment results if one or more individual light sources are sufficiently deconvolved that their images of the source surfaces completely overlap with the images of the source surfaces of adjacent individual light sources.
- colors can be mixed and even white light generated.
- one or a plurality of lenses, diffractive optics, gradient index lenses or mirrors are used as imaging optics.
- imaging optics particularly advantageous is the use of microlens arrays with aspherical lenses that can be made of plastic.
- small-area light sources are used as individual light sources, with which a high fill factor can be achieved.
- the aberrations of the highly decentered elements in the front part of the arrangement must be mastered and compensated, otherwise these elements hardly contribute to the gain in intensity.
- a suitable decentering of the respective microlens to the source is used, which maintains or compensates for these aberrations depending on the source location.
- the limits of the microlenses should have the lowest possible azimuthal differences, because these in turn lead to differently recorded apertures in the different azimuths, which likewise results in field inhomogeneity.
- the individual lenses are preferably hexagonal and not square-shaped.
- the focal length of the microlens, the limiting diameter or the edge length of the limiting hexagon of the microlens, the swelling distance and the swelling surface size must be matched to one another in such a way that the widest possible field homogeneity occurs. This has the consequence of being on homogenizing elements in the beam path, such. As the lens, can be dispensed with and the arrangement works extremely efficient.
- FIG. 3 shows the beam path for a three-dimensional LED array with the corresponding intensity distribution in the object plane.
- FIG. 4 shows the beam path for a two-dimensional LED array with the intensity distribution in the object plane.
- the lighting device has to achieve the most homogeneous possible illumination of the object level via additional optical elements.
- additional optical elements preferably diffractive optical elements (DOE), preferably microlens arrays are used. These are ideally located in or near a conjugate field diaphragm and are primarily homogenizing.
- DOE diffractive optical elements
- illumination variants can be generated for all the contrasting methods that are essential in microscopy.
- the used LED lighting is electronically switchable, adjustable in brightness and it provides all the colors.
- the lighting device is more durable and cheaper and the beam path is more compact and less expensive than is the case with conventional microscope illuminations. LEDs have a long life and are very robust and insensitive. lent to shocks.
- the spatial light distribution and the color temperature are adjustable. With LEDs, a highly efficient conversion of electrical energy into electromagnetic radiation in the desired spectral range, with a reduced heat load of the device is possible.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microscoopes, Condenser (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005029119A DE102005029119A1 (de) | 2005-06-23 | 2005-06-23 | Beleuchtungsvorrichtung, insbesondere für Mikroskope |
PCT/EP2006/006001 WO2006136406A1 (de) | 2005-06-23 | 2006-06-22 | Beleuchtungsvorrichtung, insbesondere für mikroskope |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1894050A1 true EP1894050A1 (de) | 2008-03-05 |
Family
ID=36942639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06754496A Withdrawn EP1894050A1 (de) | 2005-06-23 | 2006-06-22 | Beleuchtungsvorrichtung, insbesondere für mikroskope |
Country Status (4)
Country | Link |
---|---|
US (1) | US8125709B2 (de) |
EP (1) | EP1894050A1 (de) |
DE (1) | DE102005029119A1 (de) |
WO (1) | WO2006136406A1 (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007049626A1 (de) | 2007-10-12 | 2009-04-16 | Jenoptik Laser, Optik, Systeme Gmbh | Verfahren und Vorrichtung zur Beleuchtung einer optischen Abbildungseinrichtung |
DE102008031930B4 (de) * | 2008-07-08 | 2014-09-25 | Rüdiger Lanz | Beleuchtungsvorrichtung mit Mikro-Linsenarray |
DE102008040947B4 (de) * | 2008-08-01 | 2014-02-06 | Sirona Dental Systems Gmbh | 3D-Dentalkamera zur Erfassung von Oberflächenstrukturen eines Messobjekts mittels Triangulation |
DE102009005839A1 (de) * | 2009-01-21 | 2010-07-22 | Carl Zeiss Surgical Gmbh | Lichtquelle für ein optisches Beobachtungsgerät |
DE102009026555B4 (de) * | 2009-05-28 | 2016-03-24 | Leica Instruments (Singapore) Pte. Ltd. | Auflicht-Beleuchtungseinrichtung für ein Mikroskop |
DE102009058805A1 (de) * | 2009-12-18 | 2011-06-22 | Giesecke & Devrient GmbH, 81677 | Spektralsensor zur Prüfung von Wertdokumenten |
DE102009058807A1 (de) * | 2009-12-18 | 2011-06-22 | Giesecke & Devrient GmbH, 81677 | Sensor zur Prüfung von Wertdokumenten |
DE102009058804A1 (de) * | 2009-12-18 | 2011-06-22 | Giesecke & Devrient GmbH, 81677 | Sensor zur Prüfung von Wertdokumenten |
EP2542879A1 (de) * | 2010-03-02 | 2013-01-09 | Koninklijke Philips Electronics N.V. | Optische untersuchungen mit gesteuertem eingangslicht |
DE102012213819A1 (de) | 2012-08-03 | 2014-05-22 | Leica Microsystems (Schweiz) Ag | Verwendung einer Flächenlichtquelle zur Auflichtbeleuchtung in einem Mikroskop |
DE102012213826A1 (de) * | 2012-08-03 | 2014-06-12 | Leica Microsystems (Schweiz) Ag | Verwendung einer gerichteten Flächenlichtquelle zur Auflichtbeleuchtung in einem Mikroskop |
US20150085359A1 (en) * | 2013-09-20 | 2015-03-26 | L.J. Technology, Llc | Microscope super-resolution illumination source |
DE102014212373A1 (de) | 2014-06-26 | 2015-12-31 | Carl Zeiss Meditec Ag | Beleuchtungsvorrichtung für ein optisches Beobachtungsgerät |
US10502942B2 (en) | 2015-06-12 | 2019-12-10 | Techshot, Inc. | Integrated illuminator and condenser for microscopes |
JP2017224461A (ja) * | 2016-06-15 | 2017-12-21 | 国立研究開発法人産業技術総合研究所 | 光照射装置及びこの光照射装置に用いられる光ファイバ路 |
DE102016015870A1 (de) | 2016-09-06 | 2019-04-04 | Stiftung Caesar Center Of Advanced European Studies And Research | LED-Beleuchtungsmodul für ein Mikroskop |
DE102016116621A1 (de) * | 2016-09-06 | 2019-04-18 | Stiftung Caesar Center Of Advanced European Studies And Research | LED-Beleuchtungsmodul für ein Mikroskop |
DE102016124612A1 (de) * | 2016-12-16 | 2018-06-21 | Carl Zeiss Microscopy Gmbh | Segmentierte Optik für ein Beleuchtungsmodul zur winkelselektiven Beleuchtung |
CN106990519B (zh) * | 2017-05-12 | 2024-09-24 | 中国科学院苏州生物医学工程技术研究所 | 结构光照明显微成像系统 |
CN111427142A (zh) * | 2019-01-09 | 2020-07-17 | 卡尔蔡司显微镜有限责任公司 | 用于显微镜设备的照明模块及相关控制方法和显微镜设备 |
GB2621825A (en) * | 2022-08-22 | 2024-02-28 | Stratec Se | LED illumination for medical applications with adjustable colour spectrum |
Family Cites Families (20)
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US4211586A (en) * | 1977-09-21 | 1980-07-08 | International Business Machines Corporation | Method of fabricating multicolor light emitting diode array utilizing stepped graded epitaxial layers |
JPH07122694B2 (ja) * | 1986-10-16 | 1995-12-25 | オリンパス光学工業株式会社 | 顕微鏡用照明装置 |
US4826269A (en) * | 1987-10-16 | 1989-05-02 | Spectra Diode Laboratories, Inc. | Diode laser arrangement forming bright image |
US4893223A (en) * | 1989-01-10 | 1990-01-09 | Northern Telecom Limited | Illumination devices for inspection systems |
US5168351A (en) * | 1990-05-16 | 1992-12-01 | North American Philips Corporation | Short focal length video color projector employing dichroic mirror block |
US5309277A (en) * | 1992-06-19 | 1994-05-03 | Zygo Corporation | High intensity illuminator |
US5489771A (en) * | 1993-10-15 | 1996-02-06 | University Of Virginia Patent Foundation | LED light standard for photo- and videomicroscopy |
JP3704833B2 (ja) * | 1996-09-26 | 2005-10-12 | ソニー株式会社 | 対物レンズ及び記録再生装置 |
DE19845603C2 (de) * | 1998-10-05 | 2000-08-17 | Leica Microsystems | Beleuchtungseinrichtung für ein Mikroskop |
DE19919096A1 (de) | 1999-04-27 | 2000-11-02 | Zeiss Carl Jena Gmbh | Durchlicht-Beleuchtungseinrichtung für Mikroskope |
WO2001069584A1 (fr) * | 2000-03-14 | 2001-09-20 | Mitsubishi Denki Kabushiki Kaisha | Afficheur d'image et procede d'affichage d'image |
EP1150154B1 (de) | 2000-04-26 | 2003-03-26 | COBRA electronic GmbH | Anordnung und Verfahren zur ringförmigen Beleuchtung, insbesondere zur Auflichtbeleuchtung bei Mikroskopen |
JP3889992B2 (ja) * | 2002-05-17 | 2007-03-07 | 株式会社ミツトヨ | リング照明装置 |
JP2004004169A (ja) * | 2002-05-30 | 2004-01-08 | Nikon Corp | 顕微鏡照明装置及び顕微鏡装置 |
US6825930B2 (en) * | 2002-06-04 | 2004-11-30 | Cambridge Research And Instrumentation, Inc. | Multispectral imaging system |
EP1403695A1 (de) * | 2002-09-24 | 2004-03-31 | Agfa-Gevaert AG | Vorrichtung zum Aufbelichten einer Vorlage mittels einer Vielzahl homogenisierter und überlagerter Punktlichtquellen |
JP4332016B2 (ja) * | 2003-03-20 | 2009-09-16 | 株式会社リコー | プラスチック積層体の製造方法 |
DE10314125B4 (de) | 2003-03-28 | 2005-02-24 | Carl Zeiss Jena Gmbh | Anordnung zur Beleuchtung von Objekten mit Licht unterschiedlicher Wellenlänge |
JP2005017905A (ja) * | 2003-06-27 | 2005-01-20 | Olympus Corp | 実体顕微鏡 |
DE10339619A1 (de) | 2003-08-28 | 2005-03-24 | Leica Microsystems (Schweiz) Ag | Stereomikroskop mit integrierter Auflicht-Beleuchtungseinrichtung |
-
2005
- 2005-06-23 DE DE102005029119A patent/DE102005029119A1/de not_active Withdrawn
-
2006
- 2006-06-22 EP EP06754496A patent/EP1894050A1/de not_active Withdrawn
- 2006-06-22 US US11/887,462 patent/US8125709B2/en not_active Expired - Fee Related
- 2006-06-22 WO PCT/EP2006/006001 patent/WO2006136406A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2006136406A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006136406A1 (de) | 2006-12-28 |
US8125709B2 (en) | 2012-02-28 |
US20090224694A1 (en) | 2009-09-10 |
DE102005029119A1 (de) | 2006-12-28 |
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