EP1897095A2 - Diaphragme destine a un dispositif de reproduction d'images - Google Patents

Diaphragme destine a un dispositif de reproduction d'images

Info

Publication number
EP1897095A2
EP1897095A2 EP06777369A EP06777369A EP1897095A2 EP 1897095 A2 EP1897095 A2 EP 1897095A2 EP 06777369 A EP06777369 A EP 06777369A EP 06777369 A EP06777369 A EP 06777369A EP 1897095 A2 EP1897095 A2 EP 1897095A2
Authority
EP
European Patent Office
Prior art keywords
radiation
aperture
partially
gap
curved outer
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Withdrawn
Application number
EP06777369A
Other languages
German (de)
English (en)
Inventor
Heinz-Jürgen KNISCHEK
Uwe Ewert
Kurt Osterloh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bundesanstalt fuer Materialforschung und Pruefung
Original Assignee
Bundesanstalt fuer Materialforschung und Pruefung
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bundesanstalt fuer Materialforschung und Pruefung filed Critical Bundesanstalt fuer Materialforschung und Pruefung
Publication of EP1897095A2 publication Critical patent/EP1897095A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K2207/00—Particular details of imaging devices or methods using ionizing electromagnetic radiation such as X-rays or gamma rays

Definitions

  • the invention relates to a diaphragm, in particular for an imaging device, according to the preamble of claim 1.
  • the radiation source can be, for example, the effective focal spot on the anode of an x-ray tube or surface-distributed radiating material.
  • the latter can be radioactive waste distributed over a room in a collecting bin, whereby alleged discrepancies between declaration and actual content must be clarified.
  • Further examples of radiation sources whose shape one wishes to image are deposits with uranium-containing ores or nuclear facilities, in which it is often not only of importance to determine the nature of the radiation, but also to determine the spatial structure of the radiation sources. In addition to the sources mentioned, which generate the high-energy radiation directly, there are also those which generate these by X-ray or gamma backscattering.
  • the thickness of the material for the pinhole diaphragm must be large, that is to say in relation to the half-value thickness of the intensity of the radiation used for imaging. Therefore, the achievable image quality is essentially due to aperture diameter and Material thickness and density determined. Often, therefore, one obtains at best a shadow image of the actual pinhole, wherein the pinhole, which is to serve for imaging, becomes a collimator due to the wall thickness, which allows only a straight-line radiation beam to pass. Therefore, the aperture in the hole cameras is often trumpet-shaped with the narrow spot to the radiation source designed so as not to lose the imaging properties completely.
  • DE 690 01 117 discloses a device for detecting radiation sources in real time.
  • the device comprises a collimator which is delimited by a wall in the form of a double cone, the double cone being formed from two cones of the same opening angle, which are set opposite each other at the vertex.
  • the vertex forms the pinhole of the resulting camera.
  • DD 240 091 proposes a rotating diaphragm system consisting of several hollow cones arranged concentrically around the optical axis. Each hollow cone consists of half of the respective radiation strongly or weakly absorbing material, the hollow halves are inserted into each other so that always hollow cone halves of different materials adjoin one another.
  • a slit aperture acts as the opening of a pinhole camera. Due to the relative movement of the slit diaphragm to the detector comes from different Points of the test object scattered radiation on the detector. The relative position of the slit diaphragm specifies the depth of the test object from which secondary radiation from a detector is detected.
  • a solution for expanding the field of view in a pinhole camera is known from DE 196 03 212, in which the core of the camera has a cylindrical borehole crystal, which is terminated by a pinhole collimator, which is conically arched in the region of the borehole. In the center of the collimator is an aperture. Depending on the shape of the collimator, the field of view has an opening angle of up to approximately 120 °.
  • the object of the invention is to specify an aperture for a pinhole camera which does not rely on a mechanically moving solution and which can be combined with virtually any material layer. thickness can be realized without losing its imaging properties.
  • the object is achieved by means of a diaphragm, in particular for an imaging device, with the features mentioned in claim 1.
  • the region which absorbs the radiation to a small extent may be filled with a suitable material which absorbs the relevant radiation less than the two bodies which comprise the diaphragm, the material being in the form of a separate material. may be present installment or a coating applied to at least one of the outer surfaces coating.
  • a gap is also to be understood as meaning a region which absorbs the radiation with little absorption and is filled with material.
  • the description of the surface contour is based on a three-dimensional Cartesian coordinate system whose origin lies on the first curved outer surface without restricting the generality (compare FIG. 2a).
  • the mode of operation of the diaphragm can be explained by considering a beam with a directional vector (1, y s , z s ), ie a beam which propagates in the direction of the positive optical axis x.
  • a beam with a directional vector (1, y s , z s ) ie a beam which propagates in the direction of the positive optical axis x.
  • f (y ) tan a. If f (y) is a monotonically increasing or decreasing function, it is only possible to see through the resulting gap in a straight direction at one point. In other places, the radiation is absorbed more strongly.
  • the gap has a substantially constant gap width h (y) in a direction parallel to the optical axis x.
  • gap width h (y) is chosen so that said Is constant, beams of equal intensity are imaged with the same imaging quality.
  • C and n are constants.
  • the width of the gap is variable.
  • the imaging properties of the diaphragm can be adapted to different situations, in particular to different intensities of the investigated radiation sources.
  • a particularly symmetrical arrangement is obtained when the two absorbent bodies are cuboidal.
  • the gap appears at an angle of 45 ° when the depth b of the cuboid in the direction of the optical axis is 2 / C.
  • the diaphragm fulfills the ideal hole camera principle only for beam bundles whose direction vectors lie in the xz plane
  • the two absorbing bodies are arranged rotatable about the optical axis x, so that the gap can be rotated.
  • multiple images of an object can be made, each containing a line for which there are ideal imaging properties.
  • the building material for the diaphragm all materials are in question, which are able to absorb the radiation emitted by the radiation source effectively.
  • these are heavy metals with a high atomic number, for example copper or tungsten.
  • plastics with a high hydrogen content for example polyethylene, are suitable.
  • the relative distance between the two bodies at least partially absorbing the radiation by a rotational movement of at least one coupled to at least one of the body threaded rod is variable.
  • the relative distance can be varied by a rotational movement of a plurality of threaded rods, wherein on all threaded rods gears are mounted on which a link chain is arranged, through which the threaded rods are synchronously rotatable.
  • Figure 1 is an imaging device with a diaphragm according to the invention
  • FIG. 2 a shows an absorption element with a Cartesian coordinate system drawn in
  • FIG. 2b shows a Cartesian coordinate system with a drawn direction vector in the xz plane
  • Figure 4 is an exploded view of an inventive
  • Figures show an aperture according to the invention from two viewing
  • FIG. 6 shows an aperture according to the invention with a tilted gap
  • FIG. 7 shows an absorption element from a multiplicity of viewing angles
  • FIG. 8 shows an aperture according to the invention from a multiplicity of viewing angles
  • FIG. 9 shows radiation passing through a slit for a multiplicity of viewing angles
  • FIG. 10 shows an aperture according to the invention in a shielding wall
  • Figure 14 (schematically) a second test arrangement
  • Figures a figure / reconstruction of the test body 18 a, b, c and
  • Figures a control mechanism for the adjustment of the 19a, b, c gap width of the diaphragm according to the invention.
  • FIG. 1 illustrates the hole camera principle on an imaging device 200.
  • High-energy radiation 12 in particular X-ray or gamma radiation
  • a radiation source 10 for example a test body.
  • the radiation 12 strikes a diaphragm 100, by which it is limited and along an optical axis x to the hole Camera principle is directed to an imaging area 14.
  • the imaging region 14 is typically a projection surface on which an image of the test body 10 is generated.
  • a receiving unit 16 which is sensitive to the radiation 12, in particular a detector or a camera.
  • the diaphragm 100 comprises two absorption elements 18, 26.
  • a first absorption element 18 is shown in FIG. 2a. It has a first curved outer surface 20 whose surface contour is not shown in Figure 2a to illustrate the orientation of the underlying for their mathematical description Cartesian coordinate system. The position of the Cartesian coordinate system is chosen so that its origin lies on the first curved outer surface 20, without limiting the generality. The x-axis coincides with the optical axis.
  • the absorption element 18 is a parallelepiped, with respect to the coordinate system symmetrical body of suitable absorbent material (width a, depth b). For hard radiation this is a heavy metal with the highest possible density, for example copper or tungsten.
  • beam paths 22a, b are shown
  • ll represents, which run parallel to the side edges 24a, b of the absorption element 18.
  • the beam paths 22a, b correspond to direction vectors (1, 0, + aC / 2).
  • direction vectors (1, 0, z) for which - aC / 2 ⁇ z ⁇ aC / 2, there is exactly one parallel edge on the curved outer surface 20.
  • direction vector with non-vanishing y-component For example, the corresponding lines on the outer surface 20 are not linear.
  • Figure 4 shows an exploded view of the diaphragm according to the invention with the absorption elements 18, 26 with complementary outer surfaces 20, 28.
  • the absorption elements 18, 26 are arranged such that between them a narrow gap with the gap width h is formed.
  • the resulting aperture can be integrated into a shielding wall of shielding elements 30.
  • FIGS. 5a, b show the gap 32 between the absorption elements 18 and 26 for two viewing angles. Depending on the viewing direction, a view through the gap 32 in a straight direction is only possible at one point. In the respective direction thereby appears a parallelogram-shaped passage opening 34.
  • the cleavage direction can optionally be aligned horizontally (FIG. 5) or vertically (FIG. 6). On the basis of a second image with such rotated aperture, distances to the object can be estimated on the basis of large-area contours and, if necessary, measured.
  • FIG. 7 shows the absorption element 18 with a curved outer surface 20 for a multiplicity of viewing angles.
  • Center of Figure 7 corresponds to a direction vector (1, 0, 0) parallel to the optical axis. From this, the y-component of the directional vector of the viewing angle changes linearly in the horizontal direction, the z-component in the vertical direction.
  • FIG. 8 shows, for the same viewing angles as in FIG. 7, the absorption elements 18, 20, the gap 32 emerging therebetween and the passage opening 34 dependent on the viewing angle.
  • the trapezoidal passage opening shifts 34 laterally and while maintaining their shape and size (middle column in Figure 8).
  • the passage opening 34 decreases. The ideal hole camera principle is thus fulfilled for those points of the radiation source 10 which lie in the x-z plane.
  • FIG. 9 shows a simulation of the radiation 12 absorbed by the diaphragm 10 and the resulting imaging point 36, which is generated by a point in the radiation source 10 in the imaging region 14 (same viewing angle as in FIG. 8).
  • the shape of the imaging points 36 are similar in the middle column of FIG. 9, whereas with increasing deviation from the ideal hole camera principle, the imaging points 36 become blurred and weaker.
  • FIG. 10 shows an aperture 100 according to the invention, which is integrated in a shielding wall 30.
  • a holder of the aperture 100 in the shielding wall 30 must not allow additional beam passage on the outer sides of the two absorption elements 18, 26 allow and must on the other hand provide a firm grip to keep the once set gap width h constant.
  • FIG. 11 shows an aperture 100 according to the invention, which is integrated in a tower of lead bricks 38, which is bounded laterally by two lateral lead plates 40.
  • An X-ray flash tube 42 can be reciprocated laterally at a fixed height on a stand 44 (FIG. 12).
  • On the side facing away from the X-ray flash tube 42 of the aperture 100 is a not shown here sensitive selenium flat detector is arranged. Results of test series are reproduced in FIG. 13, both with raised aperture 100 (FIGS. 13a and c, corresponding to an orientation according to FIG. 6) and in a laterally oriented orientation (FIG. 13b, corresponding to an orientation according to FIG. 5).
  • FIG. 13d all test results are superimposed in summary.
  • FIG. 13a and c were taken at different distances from the X-ray flash tube 42 (1.4 m and 0.9 m), and the distortion angle through the curved gap 32 thus has a small difference.
  • the image of the point-shaped source 42 with horizontal aperture arrangement lie on a horizontal plane.
  • the intensity of the laterally located points is relatively strong compared to the central point.
  • the number of emitted flashes would have to be increased many times over in the lateral recordings. This is not the case when the diaphragm is placed vertically (FIGS. 13a and c).
  • FIG. 14 schematically shows a second test arrangement.
  • a continuously radiating, powerful x-ray tube 46 generates radiation, which is hidden by an all-round shield, here a lead wall with window 48.
  • the radiation passing through the window of the lead wall 48 falls on an aluminum plate as a scatter filter 50.
  • the actual test object 10, here a lead brick with characteristic contours, is between the scatter filter 50 and the diaphragm 100 according to the invention, which is integrated in a shielding wall 30 made of lead, arranged.
  • a detector 16 on the projection surface 14 is a storage disk in a cassette.
  • FIGS. 15, 16 and 17 show different views of the second test arrangement with and without stray filter 50.
  • the main axis of the diaphragm 100 is set horizontally.
  • the image of the test object 10 on the storage disk 16 is reproduced in FIG. 18a.
  • the image is distorted by the imaging mechanism with the help of the curved gap 32.
  • the degree of distortion can be determined by means of straight-line structures. If such straight-line structures are lacking, they can be determined by two images with apertures 100 rotated by 90 ° and a correlation of the respective image. Such a correlation image is shown in FIG. 18b. The closer the test object 10 is positioned to the aperture 100, the stronger the distortion.
  • An equalized image is shown in FIG.
  • Figures 19a, b and c show a control mechanism for adjusting the gap width of the invention
  • FIG. 19a side view
  • FIG. 19b cross section from above
  • FIG. 19c cross section from below
  • the aperture 100 with the inside curved gap 32, which consists of the two absorption elements 18, 26 is held by four laterally mounted, each with a threaded hole perforated brackets 52 in position.
  • the lower absorption element 18 is firmly anchored, while the upper absorption element 26 is movably mounted.
  • the four brackets 52 (only the front pairs are shown in FIG. 19 a) are connected by four threaded rods 54.
  • a gear 56 is arranged on each of the threaded rods 54.
  • the four gears 56 are connected via a link chain 58, whereby all four threaded rods 54 can only be rotated synchronously. By this arrangement, tilting of the two absorption elements 18, 26 are avoided.
  • the adjustment movements are controlled by a first, larger gear 60, which is firmly anchored on one of the four threaded rods 54 and by a second, smaller gear 62 is movable, which is accessible from outside the entire apparatus.
  • the second gear 62 is held by a bracket 64 which is fixedly connected to the lower absorption element 18.
  • additional shielding screens 66 are arranged in the edge regions of the overall apparatus.
  • inner screw supports 68 are arranged transversely to the main radiation direction. Connecting surfaces 70 between the individual parts are inclined, ie not parallel to the main beam direction.
  • the adjustment mechanism is designed so that it fits into the shape of a lead strip, as it is used for the construction of a shielding wall (see Figure 11).
  • Receiver / detector / camera 18 (first) absorbent body / absorption element

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Measurement Of Radiation (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Diaphragms For Cameras (AREA)

Abstract

L'invention concerne un diaphragme (100) notamment destiné à un dispositif de reproduction d'images (200), conçu pour limiter un rayonnement haute énergie (12) issu d'une source de rayonnement (10), et orienter celui-ci le long d'un axe optique x selon le principe de la chambre noire à sténopé, vers une zone de reproduction (14). Le diaphragme selon l'invention (100) est caractérisé en ce qu'il comporte un premier corps (18) absorbant au moins partiellement le rayonnement (12), présentant une première surface extérieure courbe (20) dont le contour de surface obéit au moins partiellement à la fonction de type z(x,y) = f(y)*x + n, et un deuxième corps (26) absorbant au moins partiellement le rayonnement (12), présentant une deuxième surface extérieure courbe (28) dont le contour de surface est au moins partiellement complémentaire au contour de la surface courbe (20) du premier corps absorbant (18). Selon l'invention, les deux corps absorbants (18, 26) sont ou peuvent être positionnés de telle manière qu'une fente ou une zone absorbant peu le rayonnement est créée entre les deux surfaces extérieures courbes (20, 28).
EP06777369A 2005-06-20 2006-06-20 Diaphragme destine a un dispositif de reproduction d'images Withdrawn EP1897095A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510029674 DE102005029674B4 (de) 2005-06-20 2005-06-20 Blende für eine bildgebende Einrichtung
PCT/EP2006/063330 WO2006136545A2 (fr) 2005-06-20 2006-06-20 Diaphragme destine a un dispositif de reproduction d'images

Publications (1)

Publication Number Publication Date
EP1897095A2 true EP1897095A2 (fr) 2008-03-12

Family

ID=37507864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06777369A Withdrawn EP1897095A2 (fr) 2005-06-20 2006-06-20 Diaphragme destine a un dispositif de reproduction d'images

Country Status (3)

Country Link
EP (1) EP1897095A2 (fr)
DE (1) DE102005029674B4 (fr)
WO (1) WO2006136545A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007057261B3 (de) * 2007-11-26 2009-08-06 BAM Bundesanstalt für Materialforschung und -prüfung Vorrichtung und Verfahren zur Herstellung von Schlitzblenden
DE102008025109B4 (de) 2008-05-22 2010-06-17 BAM Bundesanstalt für Materialforschung und -prüfung Blende für eine bildgebende Einrichtung
DE102009021750B4 (de) 2009-05-12 2013-01-17 BAM Bundesanstalt für Materialforschung und -prüfung Schwenkbar bewegliche Schlitzblendenvorrichtung
ATE545935T1 (de) 2009-12-08 2012-03-15 Bam Bundesanstalt Matforschung Asymmetrische schlitzblende sowie vorrichtung und verfahren zur herstellung derselben
EP2482288B1 (fr) 2011-02-01 2013-09-04 BAM Bundesanstalt für Materialforschung und -prüfung Dispositif d'imagerie modulaire pour rayonnement hautement énergétique doté d'un diaphragme à fente en forme de surfaces réglées
WO2014008275A1 (fr) * 2012-07-05 2014-01-09 American Science And Engineering, Inc. Collimateur à angle variable
DE102014103833B3 (de) * 2014-03-20 2015-07-09 Bundesrepublik Deutschland, Vertreten Durch Den Bundesminister Für Wirtschaft Und Energie, Dieser Vertreten Durch Den Präsidenten Der Bundesanstalt Für Materialforschung Und -Prüfung (Bam) Schlitzblende für Anwendungen in der Radiographie
DE102015008272A1 (de) 2015-06-18 2016-12-22 Kurt Osterloh Schlitzblendensystem für bildgebende Verfahren mit harter Strahlung
GB2559500B (en) 2015-09-10 2022-02-23 American Science & Eng Inc Backscatter characterization using interlinearly adaptive electromagnetic x-ray scanning
US11193898B1 (en) 2020-06-01 2021-12-07 American Science And Engineering, Inc. Systems and methods for controlling image contrast in an X-ray system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0276337A1 (fr) * 1987-01-24 1988-08-03 Dr.-Ing. Rudolf Hell GmbH Arrangement de diaphragmes pour le balayage optoélectronique des documents
EP0280375A1 (fr) * 1987-02-27 1988-08-31 Stichting voor de Technische Wetenschappen Microdiaphragme continûment variable
JPH09159935A (ja) * 1995-12-12 1997-06-20 Olympus Optical Co Ltd 可変ピンホール機構
EP1403674A2 (fr) * 2002-09-24 2004-03-31 Carl Zeiss Jena Gmbh Trou d'epingle reglable
WO2004104648A1 (fr) * 2003-05-22 2004-12-02 Carl-Zeiss Jena Gmbh Stenope reglable, en particulier pour un microscope a balayage laser

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275831A (en) 1963-05-16 1966-09-27 Industrial Nucleonics Corp Radiation beam shutter collimator
US4129784A (en) * 1974-06-14 1978-12-12 Siemens Aktiengesellschaft Gamma camera
DD240091A1 (de) * 1985-08-07 1986-10-15 Akad Wissenschaften Ddr Lochkamera fuer enrgiereiche quantenstrahlung
FR2652909B1 (fr) * 1989-10-11 1992-03-27 Commissariat Energie Atomique Dispositif de localisation en temps reel de sources de rayonnement.
FR2653896B1 (fr) * 1989-11-02 1992-01-03 Informatek Sopha Medical Ste N Gamma camera equipee d'un cone stenope pour une acquisition de type photographique.
DE4000507A1 (de) * 1990-01-10 1991-07-11 Philips Patentverwaltung Anordnung zur untersuchung eines pruefobjekts mit gamma- oder roentgenstrahlung
DE19603212C1 (de) 1996-01-30 1997-05-07 Karlsruhe Forschzent Gamma-Kamera
US6175615B1 (en) 1999-04-12 2001-01-16 General Electric Company Radiation imager collimator
AT410148B (de) * 2000-03-29 2003-02-25 Laggner Peter Dr Rotationssymmetrisches kollimationssystem für die röntgenstreuung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0276337A1 (fr) * 1987-01-24 1988-08-03 Dr.-Ing. Rudolf Hell GmbH Arrangement de diaphragmes pour le balayage optoélectronique des documents
EP0280375A1 (fr) * 1987-02-27 1988-08-31 Stichting voor de Technische Wetenschappen Microdiaphragme continûment variable
JPH09159935A (ja) * 1995-12-12 1997-06-20 Olympus Optical Co Ltd 可変ピンホール機構
EP1403674A2 (fr) * 2002-09-24 2004-03-31 Carl Zeiss Jena Gmbh Trou d'epingle reglable
WO2004104648A1 (fr) * 2003-05-22 2004-12-02 Carl-Zeiss Jena Gmbh Stenope reglable, en particulier pour un microscope a balayage laser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006136545A2 *

Also Published As

Publication number Publication date
DE102005029674B4 (de) 2008-08-21
DE102005029674A1 (de) 2006-12-28
WO2006136545A2 (fr) 2006-12-28
WO2006136545A3 (fr) 2007-04-12

Similar Documents

Publication Publication Date Title
DE69218808T2 (de) Röntgenuntersuchungsapparat
EP3177114B1 (fr) Procédé d'ajustement de la face primaire d'un diffractomètre à rayons x
EP2175456A2 (fr) Instrument d'analyse de rayons X doté d'une fenêtre d'ouverture mobile
DE69938096T2 (de) Strahlstreuungsmessvorrichtung mit Nachweis der durchgehenden Strahlenenergie
DE102013112736A1 (de) Verfahren und Vorrichtung zur Untersuchung von Proben
DE102005029674B4 (de) Blende für eine bildgebende Einrichtung
EP1772874B1 (fr) Diaphragme orienté vers le foyer
DE68916168T2 (de) Verfahren und Vorrichtung zur Analyse einer Oberfläche.
DE102008025109B4 (de) Blende für eine bildgebende Einrichtung
DE112007000422B4 (de) Röntgenstrahlkonvergenzelement und Röntgenbestrahlungsvorrichtung
DE2723431A1 (de) Vorrichtung fuer tomographie
DE10125454B4 (de) Gerät zur Röntgenanalyse mit einem Mehrschichtspiegel und einem Ausgangskollimator
DE102019210204A1 (de) Verfahren zum Korrigieren von Streustrahlung in einem Computertomographen und Computertomograph
DE102009021750B4 (de) Schwenkbar bewegliche Schlitzblendenvorrichtung
WO2021094591A1 (fr) Système d'imagerie à optique géométrique
EP2482288B1 (fr) Dispositif d'imagerie modulaire pour rayonnement hautement énergétique doté d'un diaphragme à fente en forme de surfaces réglées
EP0418587B1 (fr) Dispositif pour déterminer une dose de rayonnement d'un dosimètre en verre fluorescent
EP2333786B1 (fr) Diaphragme à fente asymétrique ainsi que dispositif et procédé de sa fabrication
DE1901666A1 (de) Verfahren fuer Kristalltopographie und Vorrichtung zur Durchfuehrung dieses Verfahrens
DE1902628B2 (de) Röntgenkamera für die Röntgenstrahlen-Beugungsanalyse von pulverförmigen Substanzen
DE102016101988A1 (de) Röntgenanalysator, Vorrichtung und Verfahren zur Röntgenabsorptionsspektroskopie
DE2003753A1 (de) Blendenanordnung zur Begrenzung eines Roentgenstrahlenbuendels
DE1597425B2 (de) Vorrichtung fuer koerperschichtaufnahmen
DE102013222209A1 (de) Blendensystem für eine Strahlenquelle sowie Vorrichtung und Verfahren zum Aufnehmen eines Projektionsbilds und zum Bestimmen einer Relativposition zwischen einer Strahlenquelle und einem Strahlendetektor
DE4137673A1 (de) Reflektometer

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 20071220

AK Designated contracting states

Kind code of ref document: A2

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 NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: EWERT, UWE

Inventor name: OSTERLOH, KURT

Inventor name: KNISCHEK, HEINZ-JUERGEN

17Q First examination report despatched

Effective date: 20080513

DAX Request for extension of the european patent (deleted)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: KNISCHEK, HEINZ-JUERGEN

Inventor name: DR. RER. NAT. OSTERLOH, KURT

Inventor name: EWERT, UWE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

18D Application deemed to be withdrawn

Effective date: 20120731