Abstract:
The invention relates to a high-pressure discharge lamp having a discharge vessel (10) sealed at both ends, a filling which can be ionized and is enclosed in the discharge area (106) of the discharge vessel (10), and electrodes (11, 12) which extend into the discharge area (106), in order to produce a gas discharge, with the discharge vessel (10) having an electrically conductive coating (107) which is designed as a starting aid and is arranged at least in the boundary area (109) between the discharge area (106) and a first sealed end (102) of the discharge vessel (10).
Abstract:
The invention relates to spectrometer measuring heads (12) for analysing characteristic variables of liquid, pasty or solid substances for optical spectrometer systems. Said measuring heads are characterised, in particular, by their long-term stability, low maintenance and simple production. A rotationally mounted mirror (I) and at least one source of optical radiation (2) or a device for uncoupling optical radiation are arranged in a housing (6) in such a manner that the optical radiation is incident, by orientating the rotationally mounted mirror either on a reference body (3) in the housing or on the substance (14) that is to be analysed via a window (7) of the housing. The mirror is mechanically coupled to a drive (4) or a bending beam and as a flexing resonator in the housing. At least one fibre optic light guide (5) is arranged in the housing in such a manner that at least one part of the optical radiation reflected or transmitted by the surface either of the reference body or of the substance that is to be analysed is injected into the fibre optic light guide. Advantageously, the source of optical radiation in the spectrometer measuring head is integrated as an illuminant making it possible to illuminate the substance or the reference body with low losses.
Abstract:
The invention relates to a method and a device for operation of ah high pressure discharge lamp with a low-frequency current of alternating polarity, whereby the high pressure discharge lamp is operated during a start phase at a higher power than the rated power thereof. According to the invention, the high pressure discharge lamp is provided with a current, at least during the start phase, with a commutation time of less than or equal to 40 microseconds.
Abstract:
The invention relates to a sensitive system for detecting chemical and/or physical state changes, preferably inside packages, of small sample volumes or a high-viscosity medium containing substances or the mixtures thereof. The aim of said invention is to make it possible to check at a low cost the state of said substances or the mixtures thereof or of different media. For this purpose, the inventive sensitive system is designed in such a way that a membrane or a sensitive film (1) is arrangeable on or in an element (3) which is interchangeably connectable to a cannula (2), thereby making it possible to introduce the element (3) and the cannula (2) into a measurable medium and to form an optical connection with an optical sensor system (4).
Abstract:
The invention relates to a device for measuring light-activated fluorescence of at least one coating that contains a fluorescent material, and its use for measuring fluid materials which cause fluorescence-quenching in at least one of the fluorescent coatings. To activate the fluorescence, at least one first light wave-guide is directed onto at least one coating applied to a support and the fluorescent light is directed at a detector by means of at least one-second light wave-guide, in order to determine the intensity of the fluorescent light. The end faces of the different fluorescent light wave guides are then arranged to have overlapping entry and/or exit cones and/or be of a shape substantially identical to the at least one coating containing a fluorescent material, in such a way that an accurate measurement of the fluorescence intensity can be attained, and that the light source(s), light wave guides and the detector(s) are lodged in a measuring head.
Abstract:
A spectrometer measuring head has a pivotally mounted mirror (1) and at least one source of optical radiation (2) or a device for uncoupling optical radiation are arranged in a housing (6) in such a manner that the optical radiation is incident, by orientating the mirror either on a reference body (3) in the housing or on the substance (14) that is to be analyzed via a window (7) of the housing. The mirror is mechanically coupled to a drive (4) or to a flexing resonator in the housing.
Abstract:
The invention relates to a high-pressure discharge lamp having a discharge vessel (10) sealed at both ends, a filling which can be ionized and is enclosed in the discharge area (106) of the discharge vessel (10), and electrodes (11, 12) which extend into the discharge area (106), in order to produce a gas discharge, with the discharge vessel (10) having an electrically conductive coating (107) which is designed as a starting aid and is arranged at least in the boundary area (109) between the discharge area (106) and a first sealed end (102) of the discharge vessel (10).
Abstract:
Method of manufacturing a sensitive single-layer system for optically detecting a concentration of an analyte, such as, for example, oxygen, the analyte being capable of investigation in liquid or gaseous aggregate condition or in a dissolved condition, by adsorption, luminescence or luminescence quenching of an indicator sensitive to the analyte, which is preferably permanently immobilized in the optical beam path. The sensitive single-layer system achieves a reproducible and extremely short response behavior. Indicators are adsorbed on a filler material and thereafter a mixture is produced with a matrix material permeable to the analyte to be detected. Then, under the action of pressure, the mixture is extruded onto a substrate, the layer thickness being formed in dependence on the applied pressure used. The applied sensitive layer is polymerized, polycondensed or hardened and the layer is also homogenized by swelling in a fluorescence indicator solution.
Abstract:
The invention relates to a device for measuring light-activated fluorescence of at least one coating that contains a fluorescent material, and its use for measuring fluid materials which cause fluorescence-quenching in at least one of the fluorescent coatings. To activate the fluorescence, at least one first light wave-guide is directed onto at least one coating applied to a support and the fluorescent light is directed at a detector by means of at least one-second light wave-guide, in order to determine the intensity of the fluorescent light. The end faces of the different fluorescent light wave guides are then arranged to have overlapping entry and/or exit cones and/or be of a shape substantially identical to the at least one coating containing a fluorescent material, in such a way that an accurate measurement of the fluorescence intensity can be attained, and that the light source(s), light wave guides and the detector(s) are lodged in a measuring head.
Abstract:
The proposed fibre-optic sensor is based on surface plasmon resonance and consists of a monomode fibre with multiple angled facets at its end face and suitable coatings. A first partial face is preferably metal-coated, a second is provided with a conventional detection layer, and the angle between the two partial surface is 30.degree., 45.degree. or 90.degree..