According to an example aspect of the present invention, there is provided a system for protecting an optical system, the system comprising a hollow first part having at least one first opening, a hollow second part arranged at least partially within the first part, and a coupling section configured to be coupled to the optical system, wherein the system is configured to guide at least a part of an incoming air flow from the at least one first opening along a flow channel between an inner surface of the first part and an outer surface of the second part.

The present invention discloses a chemiluminescence immunoassay analyzer, including a rotating disc assembly for carrying and thermal insulation of capillary tubes, an air-blowing assembly for removing residual liquid from the capillary tubes, a detection assembly for detecting the number of luminescent photons in the capillary tubes, and a bottom plate for installing the rotating disc assembly, the air-blowing assembly, and the detection assembly. The present invention further includes a charging and recycling system and a sample feeding assembly, wherein the charging and recycling system includes a fixed seat, a capillary tube push-out device, a storage device, a first driving device, and a waste liquid recycling device; the capillary tube push-out device is used for pushing capillary tubes out of the storage device and squeezing out reagents stored in the storage device; the storage device is used for storing the reagents and providing the coated capillary tubes.

An apparatus for checking mechanical parts such as tools on machine tools employs optical devices for emitting and receiving a light beam, for example a laser beam, along a checking direction, and sensors for detecting variations in the features of such a light beam. A protection device (15) for at least one of the optical devices comprises a support element (21,22) with an inner seat (20), communication conduits (18,26,34) aligned along the checking direction and a shutter (44) movable, in the internal seat, from a rest position to an operative position of the apparatus. The shutter comprises a transversal through hole (60) which is arranged along the checking direction in the operative position, aligned with the communication conduits to allow the light beam to pass through. A movable closure element (55), for example a small sphere or ball, is arranged in a transversal hollow (54) of the shutter and is pushed by a spring towards the outside of the transversal hollow. In the rest position of the apparatus, the transversal hollow is arranged along the checking direction and the movable closing element partially protrudes and cooperates with a gasket at the inlet of one of the communication conduits, to prevent the entry of foreign material and fluids into the optical device.

An extractive gas analyser system includes a supply channel, a measuring channel connected thereto between first and second ends, an analysing unit comprising an optical arrangement for analysing gaseous material in the measuring channel, which optical arrangement comprises first and second optical units arranged respectively at first and second ends of the measuring channel, a barrier arrangement near each end of the measuring channel and comprising a barrier gas inlet and outlet arranged in opposing manner across said measuring channel, each in connection with a gas source and provided with a nozzle opening directed toward the opposing outlet, said barrier arrangement arranged to provide pressurized gas creating a barrier gas curtain between the barrier gas inlet and outlet to force least a part of the gaseous material from the supply channel into the measuring channel and out through the outlet and thereby separate the gaseous material from said optical units.

The present invention discloses a chemiluminescence immunoassay analyzer, including a rotating disc assembly for carrying and thermal insulation of capillary tubes, an air-blowing assembly for removing residual liquid from the capillary tubes, a detection assembly for detecting the number of luminescent photons in the capillary tubes, and a bottom plate for installing the rotating disc assembly, the air-blowing assembly, and the detection assembly. The present invention further includes a charging and recycling system and a sample feeding assembly, wherein the charging and recycling system includes a fixed seat, a capillary tube push-out device, a storage device, a first driving device, and a waste liquid recycling device; the capillary tube push-out device is used for pushing capillary tubes out of the storage device and squeezing out reagents stored in the storage device; the storage device is used for storing the reagents and providing the coated capillary tubes.

An inspection system (1) includes: a probe (12) that is hollow, extends in a rod shape along a center axis (11), and rotates around the center axis; an optical system (30) that, through the probe, supplies laser light for inspection purposes along the center axis and receives reflected light from a surface of an inspection target that has returned along the center axis; an optical element (50) that, through an opening at a front end of the probe, emits the laser light for inspection purposes toward the inspection target with respect to the center axis and guides the reflected light in the direction of the center axis; and a gas supplying system (80) that discharges gas (89) from the opening through the probe.

A method for removing a foreign substance according to an embodiment includes: a step of preparing a Fabry-Perot interference filter in which a gap is formed between a portion of a first laminate at least including a first mirror portion and a portion of a second laminate at least including a second mirror portion facing each other so that a distance between the first mirror portion and the second mirror portion facing each other varies by an electrostatic force; a step of detecting a foreign substance adhering to a surface of the second laminate; and a step of blowing air in which an airflow peak position is adjusted on the basis of a position of the detected foreign substance onto the surface of the second laminate and thereby removing the foreign substance from the surface of the second laminate.

A fire extinguishing agent concentration measuring system having a first window, a second window positioned relative to the first window thereby defining a sensing volume between the first window and the second window, and a structure positioned relative to the first window and the second window configured to cause fluid flowing into the sensing volume from an environment within which the fire extinguishing agent concentration measuring system is placed to swirl within the sensing volume.

The present invention provides a welding seam tracking sensor, which belongs to the technical field of sensors, and alleviates the problem of detection performance reduction of a sensor. The welding seam tracking sensor comprises a sensor housing, a protection cover and a protection sheet; the protection cover is mounted on the bottom of the sensor housing, an air inlet is provided on the upper surface of the protection cover, and a blowing hole is provided on the bottom of the sensor housing. The air inlet and the blowing hole is closely connected; there is a visual hole and a laser hole in the bottom of the protection cover, a transverse slot is formed inside the protection cover, a socket is opened on the side wall of the protection cover, the protection sheet is inserted into the slot through the socket.

The invention refers to an optical measurement apparatus (10) with an optical device (18,20,22) and a liquid sample vessel (12) for measuring an optical parameter of a liquid sample (13) in the liquid sample vessel (12), comprising a drying circuit circulating drying air for venting the sample vessel (12), wherein the drying circuit comprises a mechanical water stop means (100) in the course of the drying circuit, the water stop means (100) comprising a conduit body (102) with a water-absorbing swelling element (120) arranged within the conduit body (102). The water stop means is simple and inexpensive and reliably protects all elements downstream of the water stop means from a water ingress upstream of the water