2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers (2009)
Wirth, C., Schmidt, O., Tsybin, I., Schreiber, T., Peschel, T., Brückner, F., ...
We report on beam combining of four narrow-linewidth fiber amplifier chains, running at different wavelengths and each delivering 500 W optical output power. The main amplifier stage consists of a...
Novel construction of a deformable mirror for laser beam shaping (2009)
Bruchmann, C., Eberhardt, R., Beckert, E., Peschel, T., Gramens, S., Gebhardt, S.E., ...
This paper reports on a novel construction of a deformable mirror for laser beam shaping. The deformable mirror is actuated by screen-printed thick film piezoceramic unimorphs based on lead zirconate...
Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers (2009)
Schreiber, T., Wirth, C., Schmidt, O., Andersen, T.V., Tsybin, I., Böhme, S., ...
We review the technique of incoherent beam combining and show experimentally the combination of four continuous wave fiber amplifiers to an average power of 2 kW and four pulsed 2 ns fiber amplifiers...
Average power of 1.1 kW from spectrally combined, fiber-amplified, nanosecond-pulsed sources (2009)
Schmidt, O., Wirth, C., Tsybin, I., Schreiber, T., Eberhardt, R., Limpert, J., ...
We report on spectral combination of four high repetition rate 5 ns pulsed Yb-doped fiber amplifiers at 1 mu m wavelength. The output beam is spatially and temporally superposed by use of an...
Aspheric lens array machining and replication (2009)
Scheiding, S., Steinkopf, R., Gebhardt, A., Dannberg, P., Risse, S., Eberhardt, R., ...
The present paper describes different approaches for the machining of aspheric lens arrays. Both, Single Point Diamond Turning and micro milling are discussed. A subsequent replication process with...
Lens array manufacturing using a driven diamond tool on an ultra precision lathe (2009)
Scheiding, S., Steinkopf, R., Kolbmüller, A., Risse, S., Eberhardt, R., Tünnermann, A.
The integration of a high spced spindic onto an Ultra Precision (UP) lathe gives the ability to manufacture aspheric lens arrays with high form accuracy, bw roughness and a precise pitch control in...
Laser splicing of end caps: Process requirements in high-power laser applications (2009)
Böhme, S., Beckert, E., Eberhardt, R., Tünnermann, A.
High power fiber laser assemblies require monolithic joining technologies for low loss, mechanically stable and reliable spliced component interconnection. In contrast to conventional heat sources...
Solderjet bumping for the assembly of optical fibers (2009)
Burkhardt, T., Kamm, A., Beckert, E., Eberhardt, R., Buchmann, F., Tünnermann, A.
Further miniaturization of 3D-integrated hybrid optical systems on smart system platforms requires a fast and flexible joining technology that overcomes limitations of standard bonding processes in...
Parametric investigation of solder bumping for assembly of optical (2009)
Burkhardt, T., Hornaff, M., Beckert, E., Eberhardt, R., Tünnermann, A.
Laser based solder bumping is a highly flexible and fast approach for flux-free soldering of micro-optical components in complex 3D geometries with localized and time restricted energy input. Solder...
Fabrication and characterization of a monolithic piezoelectric actuator for fiber coupling (2008)
Bruchmann, C., Höfer, B., Schreiber, P., Eberhardt, R., Buss, W., Peschel, T., ...
PZT thick-films are printed on an Al2O3-substrate, generating a cantilever monomorph. A task of positioning with two degrees of freedom is successfully fulfilled. It is realized by two parallel...
Schenk, C., Buschmann, S., Risse, S., Eberhardt, R., Tünnermann, A.
This paper presents an analytic model for the calculation of circular high-vacuum compatible gas-bearing pads with arbitrary feedings. The algorithms afford the reliable dimensioning of load-bearing...
Novel TMA telescope based on ultra precise metal mirrors (2008)
Risse, S., Gebhardt, A., Damm, C., Peschel, T., Stöckl, W., Feigl, T., ...
Modem telescopes for space applications use complex optical elements like aspheres or freeforms. For the multispectral pushbroom scanner for spaceborne Earth remote sensing the Jena-Optonik GmbH has...
Fasern richtig präparieren (2008)
Wirth, C., Schreiber, T., Eberhardt, R., Eschrich, T., Böhme, S., Tünnermann, A.
Beckert, E., Burkhardt, T., Eberhardt, R., Tünnermann, A.
For microoptics and microsystem assembly, solder bumping is introduced as a flexible and high precise joining alternative to adhesive bonding, especially if adhesives limit the system performance in...
Preparation, joining and packaging concepts for high power fiber lasers (2008)
Eschrich, T., Wirth, C., Böhme, S., Schreiber, T., Eberhardt, R., Tünnermann, A.
We report on preparation, joining and packaging of photonic crystal fibers for high power applications. Fusion splices of air-clad fibers with losses down to 0.03dB and a transmitted pump power of...
1 kW narrow-linewidth fiber amplifier for spectral beam combining (2008)
Wirth, C.S.O., Tsybin, I., Schreiber, T., Eberhardt, R., Limpert, J., Tünnermann, A.
We report on a narrow linewidth fiber amplifier system emitting a total output power of 1 kW. Limiting nonlinear effects like stimulated Raman and Brillouin scattering as well as self-phase...
Metal mirrors with excellent figure and roughness (2008)
Steinkopf, R., Gebhardt, A., Scheiding, S., Rohde, M., Stenzel, O., Gliech, S., ...
An outstanding technique in point of ultra-precision as well as economical production of mirrors is Single Point Diamond Turning (SPDT). The unique properties of the diamonds are used to get optical...
Light weight structural elements with functional surfaces (2008)
Scheiding, S., Risse, S., Peschel, T., Damm, C., Müller, S., Eberhardt, R.
Joining procedures for a high precision assembly of micro-optical systems (2007)
Mohaupt, M., Beckert, E., Eberhardt, R., Banse, H., Tünnermann, A.
Joining of micro-optical systems is an important step during the manufacturing process, especially when miniaturisation, high precision, long term stability and an automatic production are required....
The rising power of fiber lasers and amplifiers (2007)
Limpert, J., Roser, F., Klingebiel, S., Schreiber, T., Wirth, C., Peschel, T., ...
The first rare-earth-doped fiber lasers were operated in the early 1960s, and produced a few milliwatts at a wavelength around 1 mu m [1], 12]. Since the beginning of the decade, an enormous increase...
Montage von Mikrooptiken für mobile DVD Laufwerke (2007)
Mohaupt, M., Beckert, E., Eberhardt, R., Tünnermann, A., Knittel, J., Steegmueller, U., ...
Optoelectronics system integration by soldering on ceramic PCB (2007)
Beckert, E., Mohaupt, M., Eberhardt, R., Tünnermann, A., Buchmann, F.
Soldering is a promising joining technology to overcome the limitations of standard adhesive bonding in optics. This paper introduces a flexible and fast technology to apply and reflow different...
Application of PZT thick-films on adjusting purposes in micro-optical systems (2007)
Bruchmann, C., Höfer, B., Schreiber, P, Eberhardt, R., Buss, W., Peschel, T., ...
A PZT thick-film is printed on an Al2O3-Substrate, generating a cantilever monomorph. A task of positioning with two degrees of freedom is successfully fulfilled. It is realized by two parallel...
Verfahren zum Laser-gestuetzten Bonden, derart gebondete Substrate und deren Verwendung (2007)
Tünnermann, A., Eberhardt, R., Kalkowski, G., Nolte, S.
DE 102007008540 A1 UPAB: 20080906 NOVELTY - Method for laser-supported bonding of substrates comprises connecting two substrates by indirect contact and strengthening the connection between the...
Verfahren zur Reinigung von Oberflaechen sowie Verwendung des Verfahrens (2007)
Mueller, S., Eberhardt, R., Rohde, M.
DE 102007037903 A1 UPAB: 20090311 NOVELTY - The method for cleaning surface of precision processing aluminum containing component, comprises treating the component with a cleaning agent with a pH...
Krauss, M., Leopoldsberger, G., Kalkowski, G., Eberhardt, R., Tünnermann, A., Jahnke, C., ...
DE 102007060784 A1 UPAB: 20090702 NOVELTY - Joining of two or more components that are made of glass, ceramic and/or glass ceramic by using a water glass-joining solution having sodium-, potassium-...
Continuous glucose monitoring using the SCGM1 system in postcardiothoracic surgery patients (2006)
Plank, J, Schaller, R, Ellmerer, M, Koller, D, Eberhardt, R, Köhler, G, ...
No abstract available.
3-D overlay assembly of mechanical components with sub-micron accuracy (2006)
Mohaupt, M., Eberhardt, R., Beckert, E., Damm, C., Peschel, T., Tünnermann, A.
The assembly of complex and high precise mechanical devices often requires the all nment of functional elements in a sub-micron range. But during the manufacturing of stacks the used alignment...
Thermo-optical behavior of rare-earth-doped low-NA fibers in high power operation (2006)
Hädrich, S., Schreiber, T., Pertsch, T., Limpert, J., Peschel, T., Eberhardt, R., ...
The influence of the internal temperature gradient in rare-earth-doped lownumerical-aperture fibers on modal properties is analyzed for step-index and photonic crystal fibers. We provide guidelines...
Micro-optics soldering on multifunctional system platforms (2006)
Beckert, E., Banse, H., Eberhardt, R., Tünnermann, A.
Laser beam soldering as a longterm and temperature stable joining alternative to adhesive bonding for optoelectronical systems is introduced. Using a solder alloy that can be processed fluxless (e.g....
Assembly of an aperture plate system for projection mask-less lithography (2006)
Mohaupt, M., Eberhardt, R., Damm, C., Peschel, T., Tünnermann, A., Haugeneder, E., ...
Mask-less lithography becomes more and more important to reduce cycle time and lithography costs for device prototyping and small batch ASIC manufacturing. A European consortium is developing an...
Spectral beam combining of fiber lasers (2006)
Röser, F., Klingebiel, S., Liem, A., Schreiber, T., Höfer, S., Limpert, J., ...
The different concepts of combining fiber lasers for power-scaling are discussed. We report on three combined fibers with an output power of 100 W. Several proposals are made for further power...
Produktion von Mikrooptischen Bauteilen und Systemen: Status und Perspektiven (2006)
Eberhardt, R., Beckert, E., Buss, W., Karthe, W., Mauroner, O., Notni, G., ...
Demonstrators: A vital step forward for projection mask-less lithography (PML2) (2005)
Brandstätter, C., Haugeneder, E., Elster, T., Heinitz, J., Fortagne, O., ...
Beckert, E., Damm, C., Eberhardt, R., Schreiber, P.
WO2005039259 A UPAB: 20050613 NOVELTY - The optical holder (6) has the total volume of its spatial structure divided into at least two individual layer volumes and a stack of at least two individual...
Ebene Keramiksubstrate für den Aufbau hybrid-optischer multifunktionaler Systeme (2005)
Beckert, E., Eberhardt, R., Wippermann, F.
Optische Baugruppen sind zunehmend durch Miniaturisierung und die notwendige Integration elektronischer, thermischer und aktorischer Funktionalität gekennzeichnet. Im Beitrag wird eine Technologie...
Systemintegration optoelektronischer Baugruppen auf keramischen Substraten (2005)
Beckert, E., Eberhardt, R., Wippermann, F.
Der Beitrag stellt ein auf ebenen Keramiksubstraten basierendes Aufbaukonzept für optoelektronische Systeme vor, das die Integration von Optik, Elektronik und Baulementen der Siziliummikromechanik...
Laserstrahllöten - Technologie zum Aufbau optischer Systeme (2005)
Banse, H., Eberhardt, R., Beckert, E.
Basierend auf der Entwicklung eines haftfesten Lotschichtsystems werden hybride optische Systeme durch eine Laserstrahllötechnologie aufgebaut. Durch eine flussmittelfreie Prozessführung mit...
Laser beam soldering - a new assembly technology for microoptical systems (2005)
Banse, H., Beckert, E., Eberhardt, R., Stöckl, W., Vogel, J.
Based on the development of an adhering and solderable layer system microoptical subsystems are joined by laser beam soldering. Fluxless processing with AuSn - solder (80/20 weight%) results in...
Verbundbauteil und Verfahren zur Herstellung eines Verbundbauteiles (2004)
Stoeckl, W., Feigl, T., Banse, H., Eberhardt, R., Kaiser, N.
DE 10240355 A UPAB: 20040421 NOVELTY - Composite component comprises bodies joined together by a solder connection free from a fluxing agent. A thin layer system consisting of a titanium adhesion...
Elektrostatisches Fixierelement und Verfahren zu seiner Herstellung (2004)
Kalkowski, G., Banse, H., Eberhardt, R., Stoeckl, W.
DE 10330901 A UPAB: 20040331 NOVELTY - Electrostatic fixing element comprises a dielectric upper part (1) and a body (4) connected to each other in an interlocking manner. An electrically conducting...
Assembly of optical fibers (2003)
Mohaupt, M., Eberhardt, R, Beckert, E., Banse, H., Siebenhaar, C., Guyenot, V.
Laser beam soldering - a joining technologies for optical assemblies (2003)
Banse, H., Beckert, E., Eberhardt, R., Stöckel, W.
Based on the development of an adhering and solderable layer system microoptical systems are joined by laser beam soldering. Fluxless processing with AuSn solder (80/20 weight%) results in joints...
Integration of optics electronics and mechanics on miniaturized platforms (2003)
Beckert, E., Damm, C., Eberhardt, R., Schreiber, P.
The paper describes a concept that utilizes structured planar substrates based on low temperature confired ceramics (LTCC) as a platform for miniaturized, free space, two-dimensional optical systems...
VORRICHTUNG UND VERFAHREN ZUM EINFUEHREN VON BIEGEELASTISCHEN FASERN IN LOECHER (2003)
Olbricht, K., Schuster, M., Kalkowski, G., Harnisch, G., Eberhardt, R., Mohaupt, M.
WO 200252326 A UPAB: 20020903 NOVELTY - The fiber is held by the first gripper and movably guided, and is held by at lest one other gripper at a distance apart from the first gripper, to compensate...
Naumann,Renate, Alexander-Weber,C., Eberhardt,R., Giera,J., Spitzer,P.
Routine pH measurements are carried out with pH meter-glass electrode assemblies. In most cases the glass and reference electrodes are thereby fashioned into a single probe, the so- called...
Naumann, Renate, Alexander-Weber, C., Eberhardt, R., Giera, J., Spitzer, P.
Routine pH measurements are carried out with pH meter-glass electrode assemblies. In most cases the glass and reference electrodes are thereby fashioned into a single probe, the so- called...
Handling of microoptical components for microassembly (2002)
Beckert, E., Mohaupt, M., Harnisch, G., Eberhardt, R.
Technical challenges and directions for microoptical and optoelectronical packaging include the development of special handling tools for manual and automated assembly stations. These tools not only...
Reference plate manufacturing process for the ion projection lithography pattern lock system (2001)
Letzkus, F., Butschke, J., Irmscher, M., Reuter, C., Springer, R., Eder, S., ...
The 4 × Ion Projection Lithography (IPL), which is designed to reach sub 70-nm feature sizes is a promising technology for the Next Generation Lithography (NGL). An important feature of IPL is the...
Montagelösungen für hybride Mikrosysteme (2000)
Mikrosysteme sind häufig aus mehreren Komponenten und unterschiedlichen Materialien aufgebaut. Für die Montage sind definierte Schnittstellen gefragt, die sich schnell umrüsten lassen. Die...
Hybrid Integration of Microoptical Systems - Step by Step to Wafer Scale Integration (2000)
Karthe, W., Eberhardt, R., Scheller, T.
Miniaturizing in optics is more and more of interest for many fields of application. First of all smaller and more light-weight devices are needed in medicine e. g. for minimalinvasive diagnostics...
Hybrid assembly of microoptical systems (2000)
Eberhardt, R., Mohaupt, M., Scheller, T.
During the last years micro-optical and opto-electronic systems are in instrumentation and represent a huge potential for miniaturised systems. In these terms different kinds of microlenses and...
Montagelösungen für hybride Mikrosysteme. (2000)
F&M: Feinwerktechnik, Mikrotechnik, Messtechnik, 108(2000) S.40-44
Montage mikrooptischer Systeme. Abschlussbericht Verbundprojekt 1996-1999 (1999)
Eberhardt, R., Scheller, T., Döring, M., Lenhard, K., Kopp, H.
Positionier- und Justierverfahren fuer automatisierte Montage mikrooptischer Systeme (1999)
Eine Voraussetzung fuer eine progressive Weiterentwicklung der Mikrosystemtechnik und deren Produkte ist die Faehigkeit zum Aufbau von komplexen hybriden Systemen. Dieser Forderung liegt die...
Montage mikrooptischer Systeme (1999)
Eberhardt, R., Scheller, T., Döring, M., Lenhard, K., Kopp, H.
At the present time most conventional microassembly systems are viewed as not being able to fulfil the important requirements of microassembly tasks. Especially achieving a positioning accuracy of...
High-speed industrial color and position sensors (1999)
Frank, M., Kaiser, N., Buss, W., Eberhardt, R., Fritzsch, U., Kriegel, B., ...
High-speed sensors have been developed for industrial color and position analysis. These sensors consist of Si-PIN- diodes covered by miniaturized RGB-interference filters, a micro-lens array, an...
Conventional Micromachining for Microassembly Applications (1999)
Eberhardt, R, Gebhardt, A., Scheller T.
There is a growing demand for improvements in microassembly technology, especially in the area of high precision positioning. By observing the specific requirements of the micro world a spectrum of...
Guyenot, V., Eberhardt, R., Paliege, A., Paliege, R., Koehler, G.
Sintered Al2O3 parts are soldered with glass solder or with ceramic foil. The special techniques of soldering and welding used for making complex vacuum-tight parts of CO2 laser power transmitters...
A force sensing system detecting adhesive thickness during microassembly processes (1998)
Scheller, T., Juhasz, J., Eberhardt, R.
Typically, optical assembly components are bonded by adhesives with a refraction index adapted to the component material. To realise proper function of the microoptical system calculations of an...
Automatisierte Montage microoptischer Baugruppen (1998)
Eberhardt, R., Bauer, J., Juhasz, J.
Integrating microoptical systems in technical devices is more and more increasing leading to high numbers of pieces. Due to this automated methods handling, alignment and assembly have to be...
Automated assembly of microoptical subassemblies (1998)
Eberhardt, R., Juhasz, J., Bauer, J.
Microoptical and integrated optical systems are increasingly integrated into devices produced in higher batch sizes. On the one hand, conventional optical components are replaced by miniaturized...
Automated assembly of microoptical components (1998)
Eberhardt, R., Scheller, T., Tittelbach, G., Guyenot, V.
In the field of microsystem technologies one future trend is recognized. Manufacturing microsystems monolithically is becoming less reasonable and practicable with increasing applications and...
Automated assembly of microcomponents support by a 3D-inspection system (1998)
Eberhardt, R., Scheller, T., Döring, M., Lenhardt, K., Kopp, H.
At the present time most conventional microassembly systems are viewed as not being able to fulfil the important requirements of microassembly tasks. Especially achieving a positioning accuracy of...
Löbbecke, S., Eberhardt, R., Krause, H.
The variable polarity and solvent strength of supercrit. (su) CO2 was investigated by solvatochromic indicators based on empirical solvent polarity scale ET(30) of Dimroth and Reichardt to det. the...
Eberhardt, R., Löbbecke, S., Neidhardt, B., Reichardt, C.
By using the neg. solvatochromic betaine dyes I (R = H, CMe3) the UV/VIS-spectroscopically derived empirical solvent polarity parameter ET(30) for supercrit. CO2 was detd. in the temp. and pressure...
Klassifizierung der Bauteile der Mikrosystemtechnik (1997)
Ähnlich der Feinwerktechnik oder der Mikroelektronik ist eine notwendige Voraussetzung für die kostengünstige Fertigung von hybrid integrierten Mikrosystemen, daß Teilefamilien der Werkstücke...
Entwicklung eines modularen Mikromontagesystems zum Fügen mikrooptischer Komponenten (1997)
Scheller, T., Eberhardt, R., Tittelbach, G., Damm, C.
Für die Montage hybrider Mikrosysteme sind Fertigungseinrichtungen erforderlich, die die Positionierung der Bauteile mit hoher Genauigkeit realisieren, und gleichzeitig empfindliche Bauteile mit...
Assembly of microoptical elements by adhesive bonding (1997)
Eberhardt, R., Scheller, T., Tittelbach, G., Guyenot, V.
Hybrid microsystems are composed of various microcomponents which have often been manufactured by diverse techniques. In contrast to monolithically manufactured microsystems, production involves a...
Assembling of micro-optical components (1997)
Tittelbach, G., Eberhardt, R., Guyenot, V.
In future most microoptical components will be applied as hybrid integrated systems. The manufacturing of beam shaping optics consisting of two or more microoptical components in a hybrid microsystem...
New results of adhesion technology for assembly of microoptical components (1996)
Eberhardt, R., Tittelbach, G., Guyenot, V.
By the increasing applications of microoptical components in microsystems it is fundamental prerequisite for the manufacturing in small and medium-sized business to develop automatic assembly...
New edge-blackening techniques for refractive optical elements (1996)
Eberhardt, R., Gebhardt, A., Weber, A., Risse, S., Guyenot, V.
There is a trend in the optical industry to automate the edge-blackening of optical components. The goal of edge-blackening is to coat the areas outside the functional region of optical components,...
Mounting, cementing and handling of micro-optical elements (1996)
Guyenot, V., Eberhardt, R., Risse, S., Tittelbach, G.
The greatest hinderence to wider applications of micro-optics is the inefficience of the mounting process. Currently there are attempts to remedy this through transferring the know-how from the...
Lindner, H., Eberhardt, R., Herold, V., Bürger, S., Schubert, J.
In den letzten Jahren wurden eine Vielzahl von Alternativverfahren zur Therapie der symptomatischen Prostatahyperplasie propagiert. Problematisch ist und bleibt die Behandlung von...
Handling and mounting of microoptical components (1996)
Guyenot, V., Eberhardt, R., Tittelbach, G., Risse, S.
The manufacturing of beam shaping optics consisting of two or more microoptical components in a hybrid microsystem places high demands on the assembling process for positioning accuracy making a...
Aufbau- und Verbindungstechnik von mikrooptischen Komponenten (1996)
Guyenot, V., Eberhardt, R., Tittelbach, G.
Das größte Hindernis für weitere Applikationen von Mikrooptiken (MO) ist die Uneffektivität des Montageprozesses der Aufbau- und Verbindungstechnik (AVO. Know-how aus verwandten Gebieten wie der...
Assembling mikrooptischer Komponenten = Klassische Optikmontage? (1996)
Guyenot, V., Eberhardt, R., Tittelbach, G., Gebhardt, A.
Zweifellos gibt es gravierende Unterschiede zwischen Mikrooptiken (M0) und klassischen Optiksystemen. Es stellt sich die Frage, kann das Know-how der anzuwendenden Montageverfahren der Optik oder der...
Streulicht passe. Neue Verfahren zum Randschwärzen optischer Bauteile (1995)
Eberhardt, R., Gebhardt, A., Weber, C., Risse, S., Guyenot, V.
In der deutschen optischen Industrie gibt es ein hohes Bestreben, das Randschwärzen von optischen Bauteilen zu automatisieren. Stand der Technik ist der manuelle Auftrag schnelltrocknender...
Neue Verfahren zum Randschwärzen von optischen Bauteilen (1995)
Eberhardt, R., Gebhardt, A., Weber, C., Risse, S., Guyenot, V.
In der deutschen optischen Industrie gibt es ein hohes Bestreben, das Randschwärzen von optischen Bauteilen zu automatisieren. Stand der Technik ist der manuelle Auftrag schnelltrocknender...
Aufbau- und Verbindungstechnik mikrooptischer Systeme (1995)
Guyenot, V., Eberhardt, R., Tittelbach, G.
Das größte Hindernis für weitere Applikationen von Mikrooptiken (MO) ist die Uneffektivität des Montageprozesses der Aufbau- und Verbindungstechnik (AVT). Know-how aus verwandten Gebieten wie der...
Aerostatic linear guide made of high performance ceramics by joining (1995)
Eberhardt, R., Guyenot, V., Risse, S.
The aim of the work was the development of a high performance aerostatic guide which combines the advantages of the aerostatic lubrication with the properties of ceramics. It will be shown the...
Adhesive bonding of microoptical components (1995)
Eberhardt, R., Tittelbach, G., Guyenot, V.
Hybrid microsystems are composed of various micro-components which even may have been manufactured by diverse techniques. In contrast to monolithically manufactured microsystems assembly plays a...
On-line monitoring of an animal cell culture with multi-channel flow injection analysis. (1994)
Spohn, U., Eberhardt, R., Gaetgens, J., Biselli, M., Wandrey, C., ...
Joining of ceramics by glass solder (1994)
The joining of ceramics components can be performed by different methods. The joining by commercial metal solders requires an extensive technical metaillization of the joined surfaces well in...
Drossel fuer Gasfuehrungen und Gaslager (1994)
Guyenot, V., Huebner, G., Eberhardt, R., Risse, S.
The invention relates to a restrictor for gas ducts and gas-lubricated bearings which operate according to the principle of restricting gas supply by means of the restrictor-specific flow resistance....
Treatment of chronic stable angina with carvedilol in comparison with nifedipine s. r. (1991)
VAN DOES, R.DER, EBERHARDT, R., DERR, I., EHMER, B., RUDORF, J., ÜBERBACHER, H. J.
Carvedilol 25 mg b. d. was compared with nifedipine s. r. 20 mg b. d. for subchronic treatment of patients with chronic stable angina. After washout and placebo run-in, 163 patients were randomly and...