摘要:
A method for determining optical properties of a sample material includes: determining a first intensity of light in a first polarization state that was reflected by the sample material; determining a second intensity of the light in a second polarization state that was reflected by the sample material; forming the ratio between the first intensity and the second intensity, or vice versa. Further, an apparatus for determining optical properties of a sample material, comprising at least one detector device for determining a first intensity of light in a first polarization state that was reflected by the sample material and for determining a second intensity of the light in a second polarization state that was reflected by the sample material and at least one computing unit for forming the ratio of the first intensity and the second intensity, or vice versa.
摘要:
The present invention relates to a method for building a shaped body by layer-wise solidification of photopolymerizable building material by means of stereolithography characterized in that the positioning of a blade with respect to a vat bottom is adjusted in such a manner that the resulting predetermined, uniform layer thickness is higher than the predefined layer thickness to be set by lowering a building platform, but does not exceed the predefined layer thickness by more than 50%.
摘要:
A photothermal interferometry apparatus and method for detecting a molecule in a sample, in particular for detecting a trace gas species, comprising: a Fabry-Perot interferometer with a first mirror, a second mirror and a first cavity for containing the sample extending between the first and the second mirror, a probe laser for passing a probe laser beam through the first cavity of the Fabry-Perot interferometer, an excitation laser for passing an excitation laser beam through the first cavity of the Fabry-Perot interferometer for exciting the molecule in the sample, and a photodetector unit for detecting the transmitted probe laser beam passed through the first cavity of the Fabry-Perot interferometer.
摘要:
The invention relates to a method and to a device for determining a material property, in particular the aging state or the aging resistance, of a bitumen material, comprising the steps: applying a substantially monochromatic first excitation radiation of a first excitation wavelength to the bitumen material; measuring the intensity of a first fluorescence radiation, excited by the first excitation radiation, at a measurement wavelength; applying a substantially monochromatic second excitation radiation of a first excitation wavelength to the bitumen material; measuring the intensity of a second fluorescence radiation, excited by the second excitation radiation, at the measurement wavelength; determining a first key figure for the material property of the bitumen material from the ratio between the intensity of the second fluorescence radiation to the intensity of the first fluorescence radiation.
摘要:
Radically polymerizable dental material, which contains at least one sulphonic acid ester of Formula 1: in which A is H, CN, an aromatic, cycloaliphatic, linear or branched aliphatic C1-C30-hydrocarbon radical or a combination thereof; X is COO— or —CON(R1)— or is absent; B is an aromatic, cycloaliphatic, linear or branched aliphatic C1-C30-hydrocarbon radical, or a combination thereof; R1 is hydrogen or an aromatic, cycloaliphatic, linear or branched aliphatic C1-C10-hydrocarbon radical; m is an integer from 1 to 6, n is an integer from 1 to 6 and p is an integer from 1 to 6; wherein m and p cannot simultaneously be greater than 1. The compounds of Formula 1 are active as chain transfer agents in radical polymerization.
摘要:
A spindle arrangement for a machine tool, comprising a spindle for driving a tool and at least one actuator for exciting vibration of the tool, characterized in that the spindle arrangement is provided with a compensation device for at least partly compensating the inertia forces produced by the vibration excitation in the spindle region.
摘要:
A heat storage system using sand as a solid heat storage medium has a fluidized bed heat exchanger (3) arranged between and separated from a storage tank (1) for cold sand and a storage tank (2) for hot sand by weirs (4, 5). The heat exchanger (3) is divided into a plurality of chambers (7) by weirs (6). The weirs (4, 5, 6) are arranged as a combination of overflow and underflow weirs. Fluidized sand is produced in the chambers (7) by a blower (14) positioned underneath the heat exchanger (3). Heat is transferred from a heat source to the sand fluidized and from the fluidized sand to a heat transport medium by transferring mechanisms (8, 9) in the chambers (7). The sand is redirected in a horizontal direction by horizontally acting blowers and/or installations (12) projecting into a respective chamber from a side.
摘要:
A floating platform is provided including the following: a covering element; at least three buoyant bodies, which are separated from each other, are fixedly mounted to the lower face of the covering element, are open toward the bottom, and are made of a gas-tight, pressure- and corrosion-resistant flexible material. The buoyant bodies enclose a closed hollow space when coming into contact with a liquid surface. At least one compressed-air generating device is also provided for generating an overpressure in the individual hollow spaces.
摘要:
An arrangement of floating platforms is provided, including (a) an anchored main platform and (b) one or more outer platforms, each of which being connected to the main platform by at least one connection element. One or more of the main and/or outer platforms are rotatable about a vertical axis by drive units which are fixed thereon. Marine engines having a propeller propulsion system are provided as drive units on the main platform and/or the outer platforms.