Provided is a gas detection device that is compact and can perform accurate measurement. The gas detection device includes a light-emitting section (10), a light-receiving section (20), and a light-guiding section (30) that guides light from the light-emitting section (10) to the light-receiving section (20). The light-guiding section (30) includes a mirror (50) and has a shape of part of at least one spheroid. The mirror (50) is provided at a position of or in proximity to a first focal point of the spheroid. The light-emitting section (10) and the light-receiving section (20) are each provided at a position of or in proximity to a focal point of the spheroid that is not the first focal point. The light-emitting section (10) and the light-receiving section (20) are arranged in parallel to a major axis direction of the spheroid.

The invention relates to a test cell for mixing a liquid. The test cell comprises an interior space for receiving the liquid and a running rail, which is formed in the interior space, for a ball, wherein the running rail is formed by two projections which project into the interior space from opposite side walls of the test cell. According to the invention, the running rail has a straight section and is deflected upward at both ends. In the test cell according to the invention, a high filling level can be achieved with a low quantity of liquid, this being advantageous for optical measurements. The invention also relates to a measuring method using the test cell.

The present invention belongs to the technical field of trace gas detection, and relates to a multi-cavity semi-open resonant photoacoustic cell and a multi-gas simultaneous measurement system. The photoacoustic cell includes multiple resonant cavities. Each resonant cavity has a unique length and a unique resonant frequency, so each resonant cavity corresponds to one to-be-measured gas. A sensitive diaphragm of an acoustic sensor is fixed on one end face of the photoacoustic cell. Photoacoustic signals of different frequencies generated in the resonant cavities act on the sensitive diaphragm of the acoustic sensor, causing the sensitive diaphragm of the acoustic sensor to vibrate periodically. Concentration information of multiple to-be-measured gases can be obtained by analyzing the vibration of the sensitive diaphragm of the acoustic sensor.

The invention relates to a container for a sample. In order to improve an optical or spectroscopic examination of a sample stored in the container, a container is proposed, comprising a bottom portion, a container axis being oriented perpendicularly to the bottom portion; a first wall portion, said first wall portion adjoining the bottom portion; and a second wall portion, said second wall portion adjoining said first wall portion, and wherein the second wall portion is inclined by at least 20° with respect to the container axis.

A cuvette in which a fluorescent enzymatic reaction can be carried out that is for analyzing a sample includes at least one vertical wall and a bottom. The cuvette is made of a transparent or translucent material and a portion of the cuvette is partially covered on the outside with a sleeve including an inner coating made of retro-reflective material that is in contact with the cuvette.

The invention provides a combination of a sample container and energy dispersion device, and method of manufacture. Among possible applications is construction of compact spectrometers optimized for a single use. The sample container includes diffraction gratings such that, when the container is illuminated with collimated light and observed with optics focused at infinity, one obtains an optical spectrum useful for identifying and measuring the concentration of specimens placed in the container, applicable for chemical analysis and for screening fluids for chemical or biological analysis. The invention further provides methods to fabricate a combination of a sample container and energy dispersion device, wherein one such method utilizes an inflatable bladder and temperature-controlled templates to emboss gratings on both outside and inside faces of a given cuvette.

A reaction vessel for testing includes a reaction cup, a sample holder and a cover. The sample holder is contained in the reaction cup and/or the cover. The reaction cup has a first cavity, and the sample holder has a collection portion. The cover is for covering an opening of the first cavity. A packaging bag and a piercing member are contained in the reaction cup and/or the cover; the packaging bag has a second cavity for receiving external second reagent and a diaphragm for covering an opening of the second cavity; the piercing member is for piercing the diaphragm in order to mix a second reagent with a first reagent and a test sample. The reagent used for testing can be prepared according to the required time and sequence and reacted with the test sample.

An optical device for a biological or chemical sensor includes: an absorption cavity configured to receive a biological or chemical medium; an injection waveguide to inject an analysis light beam into the absorption cavity; and an extraction waveguide to extract a measurement light beam, corresponding to the analysis light beam after transit through the absorption cavity. The absorption cavity has a shape of a right cylinder with an elliptical base. One end of the injection waveguide is placed at a first focus of the ellipse and one and of the extraction waveguide is placed at a second focus of the ellipse. A core of the injection waveguide and a core of the extraction waveguide each have a tip-shaped end, with a constant height in a plane parallel to the generatrix of the right cylinder and a tip-shaped cross section in planes parallel to the base of the right cylinder.

According to some aspects, a microfluidic device is provided, comprising a sample holding chamber; and at least one flow path connected to the sample holding chamber configured to supply liquid into the sample holding chamber, wherein the sample holding chamber includes a first inner surface; and a light irradiation region intersecting the first inner surface and configured to receive light from outside of the sample holding chamber to irradiate liquid inside the sample holding chamber, wherein the first inner surface includes at least one recess shaped so as to contain gas bubbles present within the liquid, and wherein the at least one recess is located outside of the light irradiation region.

The drive device includes a guide element defining a guide track, the guide element being configured to receive and guide a cuvettes strip in translation along the guide track, and a drive belt configured to displace the cuvettes strip in translation along the guide track when the cuvettes strip is received in the guide element. The drive belt is disposed below the guide track and is configured to cooperate with lower portions of the cuvettes of the cuvettes strip when the cuvettes strip is received in the guide element.