An apparatus for testing a flexible screen. The apparatus for testing a flexible screen includes a slide rail, a reel, a clamping module and a drive module. The reel is fixed to one end of the slide rail. The axial direction of the reel is perpendicular to the extension direction of the slide rail. The flexible screen includes a first end and a second end which are disposed opposite to each other. The reel is configured to fix the first end of the flexible screen and rotate to drive the flexible screen to fit to the reel and coil around the reel. The clamping module is configured to clamp the second end of the flexible screen. The reel is further configured to rotate to drive, through the flexible screen, the clamping module to slide along the slide rail towards the reel.

An apparatus for testing a flexible screen. The apparatus for testing a flexible screen includes a slide rail, a reel, a clamping module and a drive module. The reel is fixed to one end of the slide rail. The axial direction of the reel is perpendicular to the extension direction of the slide rail. The flexible screen includes a first end and a second end which are disposed opposite to each other. The reel is configured to fix the first end of the flexible screen and rotate to drive the flexible screen to fit to the reel and coil around the reel. The clamping module is configured to clamp the second end of the flexible screen. The reel is further configured to rotate to drive, through the flexible screen, the clamping module to slide along the slide rail towards the reel.

A method for monitoring the structural health of a structure that supports guided propagation modes of elastic waves, includes the following steps: a) acquiring an ambient noise propagating through the structure by means of at least one pair of non-collocated elastic-wave sensors; b) estimating a function representative of an impulse response of the structure for elastic propagation between the constituent sensors of said pair; c) extracting at least one dispersion curve of the elastic propagation through the structure by time-frequency analysis of this function representative of an impulse response; and d) estimating at least one parameter indicative of a mechanical property of a constituent material of the structure from the dispersion curve obtained in step c). A system for implementing such a method is also provided.

A method for determining the shape of an optical waveguide (1) having a plurality of fiber Bragg gratings (15) includes the following steps: coupling light (20) of a light source (2) into the optical waveguide (1), coupling the reflected light out of the optical waveguide (1), determining a spectrum (35) of the reflected light by measuring the intensity (I) versus the wavelength (1), the spectrum (35) being fed to a self-learning neural network (4) and the shape of the optical waveguide (1) being determined by the neural network. A device for determining the shape of an optical waveguide (1) may be used in a catheter or an endoscope or a biopsy needle or an aerodynamic profiled element. A device for producing training data for a neural network to implement the above is also contemplated.

The present disclosure relates to a polarity test system and method used for MPO optical cables, and provides a polarity test system used for MPO optical cables, where the MPO optical cable comprises a first end-face, a second end-face and a plurality of optical fibers extended between the first end-face and the second end-face, with each optical fiber comprising a first end arranged at the first end-face and a second end arranged at the second end-face. The system comprises: a light source, configured to irradiate the first end-face of the MPO optical cable so that the light transmitted from the light source enters the optical fibers from the first end of the optical fibers and leaves the optical fibers from the second end of the optical fibers; a baffle, set between the light source and the first end-face that can move relative to the first end-face to block the first end of one or a plurality of optical fibers, and configured to change the nature of light received by the optical fibers which first end is blocked by the baffle; and a detection device, configured to detect the light output by the second end of each optical fiber as the baffle moves relative to the first end-face.

A method and an apparatus for detecting bending stiffness and a method for testing a display panel. The method for detecting bending stiffness includes: arranging an object to be tested on a reference surface to make a stationary portion and a rotating portion of the object to be tested attached to the reference surface, the stationary portion and the rotating portion being connected to each other; driving the rotating portion to bend from the reference surface toward the stationary portion, and acquiring a rotation angle between the rotating portion and the reference surface; acquiring a bending force received by the rotating portion when the rotating portion is bent from the reference surface toward the stationary portion; and determining bending stiffness of the object to be tested on the basis of the bending force and the rotation angle.

An inspection tool for allowing visual inspection of an end face of a fiber optic ferrule. The inspection tool includes a passage for allowing a camera to view the end face. The inspection tool also includes light directing structure for first directing ferrule illumination light axially along the inspection tool, and then reflecting the axial light across the end face of the fiber optic ferrule.

An optical test system and corresponding method disclosed herein provides highly accurate test data for both sides of a lens simultaneously and efficiently to analyze the surface topography and/or geometric parameters of a lens or lens system. More particularly, the optical test system and corresponding method moves the lens in test plane to align a plurality of points of a test pattern on a lens surface with a vertical axis while probes aligned with the vertical axis and on opposing sides of the lens simultaneously collect wavelength-specific data for both lens surfaces. The optical test system uses the collected wavelength-specific data to produce a surface topography and/or the associated lens geometric parameters for each lens surface.

An apparatus for locating a measurand anomaly, such as a hot-spot, along an optical waveguide is provided having: an optical waveguide, a light source configured to transmit light along the waveguide and a plurality of sensors provided along the waveguide. Each sensor is configured to reflect a portion of light propagating along the waveguide at a respective sensor wavelength corresponding to a measurand. The plurality of sensors is configured into one or more sets according to their sensor wavelengths, each set comprising a plurality of sensors with respective sensor wavelengths, wherein the sensors are configured such that the sensor wavelength for each sensor in a respective set is substantially equal when the measurand experienced by each of the sensors in that set is equal. The apparatus further includes a detector configured to monitor the light reflected by the sensors, and a control system.

The systems and methods disclosed herein are used to estimate the insertion loss of an anticipated optical connection between a first optical connector having least one first optical fiber and a second optical connector having at least one second optical fiber. The method includes extracting first connector information stored on the first optical connector to obtain extracted first connector information and extracting second connector information stored on the second optical connector to obtain extracted second connector information. The estimated insertion loss of the anticipated optical connection between the first optical connector and the second optical connector is calculated using the extracted first connector information and the extracted second connector information. The total estimated insertion loss of a fiber link that includes one or more such optical connections can be used to qualify the fiber link without having to directly measure the fiber link insertion loss.