Abstract:
A high pressure optical flow cell system suitable for use in a real time optical particle monitoring system. The system is modular, with at least two housings joined together with removable mechanical attachment devices. Inlet and outlet passageways introduce and remove high pressure fluid into a flow cavity located between adjacent housing faces. An o-ring or other compliant member seal is provided between the faces to prevent leaks of the high pressure fluid. At least one optical window is provided with a substantially planar face flush with the flow cavity surface. An optical assembly maintains the face of the optical window flush with the flow cavity surface over a wide range of temperatures and pressures. A system and method for maintaining the face of the optical window flush with the flow cavity surface over a wide range of temperatures and pressures.
Abstract:
A flow analyzer includes a flow body having a single-piece construction. The flow body includes a flow path extending through the flow body along a flow direction between opposing inlet and outlet ports and an enclosed wiring conduit extending substantially transverse to the flow direction between a first side of the flow body and a second side of the flow body. The enclosed wiring conduit is isolated from the flow path. An illumination unit is disposed on the first side of the flow body and configured to illuminate fluid within the flow path. An observation unit is disposed on the second side of the flow body and configured to visually observe the fluid within the flow path.
Abstract:
A method for detecting and counting particles suspended in fluids, such as bacteria suspended in urine, utilizing dynamic features of the suspended particles and employing light scattering measurements. The disclosed method is suitable for determining the susceptibility of bacteria to antibiotics. A cuvette for detecting bacteria in fluids, which is especially suited for the light scattering measurements, is provided.
Abstract:
Optical mirror elements (10) having a diffusive backing, methods for making such optical mirror elements, and devices incorporating such optical mirror elements. The optical mirror element (10) typically includes a first, reflective surface (15), and a second surface (30) having uneven or granular features, wherein light passing through the first surface is diffusely reflected by the uneven or granular features of the second surface. The optical mirror elements are particularly well suited for use in Herriott Cell arrangements in gas analyzers.
Abstract:
The invention relates to a self-cleaning window (3,4), in particular for spectroscopic measurement cells, process probes or chemical reactors, and to the use of these windows (3,4). The window (3,4) has an electrically conductive and transparent electrode (3,4) or consists of such an electrode (3,4). Undesirable deposits on the window (3,4) can be avoided or removed by applying an electrical voltage between the transparent electrode (3) and a further electrode (4) in the presence of a conductive liquid (6) which wets the electrodes. The invention also relates to an apparatus for optical measurements, in particular for optical spectroscopy, having a self-cleaning window (3,4). In addition, the invention relates to a method for removing or avoiding undesirable deposits from/on the window (3,4) according to the invention.
Abstract:
A cuvette capable of suppressing the complication of the structure of each part of an analyzer and enabling the stirring of a specimen in a short time. The cuvette comprises a first body part positioned on a bottom part side, having inner and outer surfaces of circular shape in horizontal cross section, and receiving a measuring beam and a second body part positioned on an opening side, having an inner surface of non-circular shape in horizontal cross section and an outer surface of circular shape in horizontal cross section.
Abstract:
The present invention concerns a disposable microcuvette for spectrophotometeric determination of haemoglobin in undiluted whole blood, characterised in that the cavity includes a dried, non hygroscopic hemolysing agent or a combination thereof provided that the cavity is essentially free from azide and nitrite.
Abstract:
Disclosed is a device for optically coupling a first optical element (12) to a second optical element (11; 30). Said device comprises: a first optical element (12) with a first radiation penetration surface (121); a second optical element (11; 30) with a second radiation penetration surface (32) located across from the first radiation penetration surface (121); and a chamber which is delimited by the first and second radiation penetration surface (121, 32) and a circumferentially closed sidewall (21) that connects the first and second radiation penetration surface (121, 32). The circumferentially closed sidewall (21) defines a first sector in the first radiation penetration surface and a second sector in the second radiation penetration surface, the area of the first sector being smaller than the area of the first radiation penetration surface (121) and the area of the second sector being smaller than the area of the second radiation penetration surface (32). The inventive device further comprises a feeding conduit (15a) to the chamber for delivering index-adjusting liquid, and a discharge conduit (15b) from the chamber for evacuating index-adjusting liquid or gas from the chamber.