Abstract:
A fluid detector includes a coupler. The coupler includes a hollow tube, an optical fiber, and a jacket. A fluid delivery device includes a fluid output end and a fluid recovery end. The fluid output end is connected to a first input end of the hollow tube. The fluid recovery end is connected to a first output end of the hollow tube. An optical signal generator inputs an optical signal to a second input end of the optical fiber. A detection module includes an optical sensor, a database, and a processor. The optical sensor detects the optical signal outputted by the second output end and generates a sensing datum. The processor is electrically connected to the optical sensor and the database. The processor compares a characteristic value of the sensing datum with characteristic values of sample data stored in the database and generates a detection data.
Abstract:
Devices and methods for performing frequency domain (FD) fluorescence lifetime spectroscopy are provided. The devices include a modulated light source, a focusing optical fiber, a detecting optical fiber, and a detector. The methods include focusing sinusoidal modulated incident light from a light source on a biological sample containing a protein, detecting a range of wavelengths of sinusoidal modulated fluorescent light emitted from the protein, determining a phase shift for the modulated fluorescent light, determining an amplitude modulation of the modulated fluorescent light, and determining a fluorescence lifetime of the protein.
Abstract:
A method for measuring a value change of a parameter at the sensing area of an optical sensor element. The method includes the steps:changing the value of the parameter thereby detecting the position and position change of a first signal peak within the detection window of a detector as well as thereby detecting the position and the eventual position change of a second signal peak within the detection window of the detector, and correlating the position detections of first and second signal peak and correlating the position change detections of first and second signal peak and attributing a value and/or a value change to the correlated detections
Abstract:
An in-situ on-line detection device and detection method for a long-distance metallurgical liquid metal component. The detection device comprises a front-end high-temperature resistant probe (18), a middle-end optical sensing device (19) and a back-end control platform (24), wherein the head of the front-end high-temperature resistant probe (18) is placed in a liquid metal (22), the tail thereof is coaxially connected to the middle-end optical sensing device (19), and an optical window (15) is arranged in the connection position; and the middle-end optical sensing device (19) is connected to the hack-end control platform (24) through a signal line (25). The detection device and detection method can provide a timely and valid message for quality control and a melting end, so that the detection time is greatly shortened, the detection distance can he adjusted extensively, the measurement result is accurate, and it can he achieved to measure components that are difficult to measure such as C, S, P, etc.
Abstract:
A mercury detection system that includes a flow cell having a mercury sensor, a light source and a light detector is provided. The mercury sensor includes a transparent substrate and a submonolayer of mercury absorbing nanoparticles, e.g., gold nanoparticles, on a surface of the substrate. Methods of determining whether mercury is present in a sample using the mercury sensors are also provided. The subject mercury detection systems and methods find use in a variety of different applications, including mercury detecting applications.
Abstract:
There is disclosed a distributed optical fiber sensor arranged to deliver probe light pulses of different wavelengths into corresponding different sensing optical fibers, and to determine one or more parameters as functions of position along each of the sensing fibers from detected backscattered light of each corresponding wavelength. In another arrangement, the different wavelengths are directed in different corresponding directions around a loop of sensing optical fiber.
Abstract:
A method of determining a parameter of a wafer is disclosed. Light is propagated through a waveguide disposed in the wafer. A first measurement of optical power is obtained at a first optical tap coupled to the waveguide and a second measurement of optical power is obtained at a second optical tap coupled to the waveguide using a photodetector placed at a selected location with respect to the wafer. A difference in optical power is determined between the first optical tap and the second optical tap from the first measurement and the second measurement. The parameter of the wafer is determined from the determined difference in optical power.
Abstract:
A method of determining a parameter of a wafer is disclosed. Light is propagated through a waveguide disposed in the wafer. A first measurement of optical power is obtained at a first optical tap coupled to the waveguide and a second measurement of optical power is obtained at a second optical tap coupled to the waveguide using a photodetector placed at a selected location with respect to the wafer. A difference in optical power is determined between the first optical tap and the second optical tap from the first measurement and the second measurement. The parameter of the wafer is determined from the determined difference in optical power.
Abstract:
An apparatus (01) configured for identifying numbers for layers having objects thereon within a container (02), the objects being accommodated in the container and arranged in layers. the apparatus comprising: an optical fiber sensor (10) configured for sensing existence of the objects within a sensing scope; a support frame (20) configured for carrying the optical fiber sensor (10); a guide rail (60) configured for defining a moving direction of the support frame (20); a motor (40) and driving mechanism (30) configured for driving the optical fiber sensor to move along the guide rail; and a controller (50) connected with the optical fiber sensor (10) and the motor (40), wherein the controller (50) is at least configured for obtaining the numbers for the layers having objects thereon according to a moving distance of the support frame (20), in the case that the existence of the objects is sensed by the optical fiber sensor (10). In the case of a smaller spacing between the layers in the container (02), the apparatus (01) can accurately obtaining the number for the layer in which an object locates, so that a robot arm can take out the object placed at this layer directly. The object is a display panel.