433 results about "Optical testing" patented technology

A method of detecting at least one analyte in extra-cellular spaces includes the step of inserting a microprobe through the stratum corneum toward the stratum basale of the skin of a subject into extra-cellular spaces containing interstitial fluid having at least one analyte to be detected, said microprobe having a diameter at its tip no larger than approximately 10-50 microns. The method further includes optically testing for a predetermined analyte in the extra-cellular space adjacent the distal end of the microprobe without drawing a sample of the interstitial fluid. Preferably the microprobe body includes a sensor layer covering the distal optical tip of the microprobe body, the sensor layer being adapted to interact with a predetermined analyte to be detected in the interstitial fluid, and an optical detector responsive to interaction of the sensor layer with the predetermined analyte to signal detection of said predetermined analyte.

An instrument and method for optical testing of an eyeglass lens, including progressive addition lenses, to obtain image quality measurements includes an illumination system for presenting a beam of light to a test lens, a test lens positioning system for rotating the test lens so that different areas on the lens are illuminated, a zoom lens for focusing the beam at a constant effective focal length, a detection system for recording and measuring image quality of the test lens, and an alignment boom for conveying the zoom lens and the detection system such that the optical axis remains aligned with the beam existing the test lens. The instrument is fully automated and capable of obtaining measurements of the power, astigmatism, prism and modulation transfer function at various locations on the surface of the lens.

The invention provides a full-screen color correction method for an LED display and an implementation system thereof, wherein the system comprises a correcting computer, a camera, an optical tester, an integrating sphere, a display control computer, an LED controller and a scanning control panel, wherein the camera and the optical tester respectively carry out parameter sampling on the partitions and full screen of the LED display, and after correction of brightness and chromaticity on the pixel level and the module level of the partitions and the full screen on the correcting computer, the corrected data are transmitted to the scanning control panel of the LED display and stored. The full-screen color correction method and the implementation system thereof of the invention realize full-screen color correction of the LED display, and overcome the defect that after LED modules are corrected one by one by a conventional discrete correction method, when the time, environment and operation are inconsistent, individual LED modules have brightness or chromatic aberration observable by naked eyes, thereby improving the correction quality and correction efficiency.

A system and method are provided for determining intravenous blood levels of a target compound contained in a blood vessel of a patient. The method includes the operation of detecting concentrations of the target compound within a patient's blood using a sensor device configured to optically test blood at a location within the blood vessel. Another operation is calculating a measured amount of a therapeutic compound to administer into the patient's bloodstream based on the concentrations of the target compound in the blood. The measured amount of therapeutic compound may then be pumped through the catheter into the patient's blood.

A method of making a display includes providing a display substrate having a plurality of control electrodes in a display area; locating a plurality of chiplets responsive to a controller to provide current to the control electrodes, each chiplet having a separate substrate, at least one pixel connection pad electrically connected to a control electrode, and one or more test light emitters formed in the chiplet responsive to the current provided on the control electrodes to emit light; controlling the chiplets to pass current through one or more of the test light emitters formed in the chiplet to emit light; detecting the light emitted by the test light emitters to determine faulty chiplets or chiplet interconnections; replacing or repairing the faulty chiplets or chiplet interconnections; and forming an organic light emitting diode over the substrate in the display area connected to the control electrodes.

The invention relates to a tension-compression and fatigue loading testing machine based on a laser confocal microscope, and in particular provides a loading testing machine applicable to a laser confocal microscope platform. The testing machine comprises a fixed base plate, a tension-compression loading device driven by a motor, a fatigue loading device driven by a piezoelectric ceramic, a force sensor, a holding device, a phase-shifting device and the like. The testing machine can perform tension-compression and fatigue loading tests on a typical sample and a film of a metal or non-metal material under macroscopic scale uniaxial stress, and designs the phase-shifting device for an optical testing method for improving the test accuracy and the automation degree. The testing machine has a compact structure, and a test piece is abutted on the lower bottom surface of the testing machine so that the loading under the laser confocal microscope platform can be achieved; besides, the testing machine uses the microscope to collect loading images, and process the images by an optical method to obtain mechanical parameters of a test piece material. The testing machine has the advantages of high system measurement sensitivity, reliable result and wide application range.

An automatic test system of LED comprises operation control desk, PLC and system host including LED test device, data processing device and communication interface. The said LED test device is featured as using parameter test device of electrical property to test LED current and voltage, using brake current device to test diode brake current and using light spectrum device to test LED optical parameters.

The invention consists of pulsed laser and light receiving converter. The pulsed laser is used to emit laser pulse with constant optical power. The light receiving converter comprises optical-electrical converter, amplifying circuit used to amplify the electrical signal above and the A / D converter used to convert the electrical signal into digital signal. The amplifying circuit above comprises at least two amplifying stages and stage switch used to complete segmented amplification of dynamic range.

Disclosed is an alginate hard capsule disintegrable at different positions in gastrointestinal tract. Processing steps include preparing glue solution, glue solution dipping, solidifying, drying, drawing out, cutting, fastening, optical testing and sterilizing of glue solution and capsule filling. The glue solution is prepared by dissolving univalent alginate, plasticizer and pore former in water, wherein the pore former is a polymer film-forming material, glycerin and sorbitol serve as the plasticizer; the solidifying is that dipped gel solution is made into alginate gel capsule by means of ionic cross-linking or acidulating, wherein solidifying solution is multivalent metal ion water solution or acid solution; and finally active ingredients and disintegrating accelerator are filled in hard capsule shells to obtain finished products, wherein the disintegrating accelerator is a substance which can be in precipitation reaction or complexation with multivalent metal ions. The alginate hard capsule is widely applied to different disintegrating environments in the gastrointestinal tract and disintegrable in vivo at different speeds to release the active ingredients and has the advantages of high hydrothermal stability, simple preparation method and low cost.

The invention relates to a generation device and generation method of a fractional-order perfect vortex beam. The device comprises a continuous wave laser; a light reflecting mirror is arranged at the advancing direction of a light beam emitted by the continuous wave laser; a pinhole filter, a convex lens I, a polarizer and a beam splitting cube are arranged at the advancing direction of a light beam reflected by the light reflecting mirror; a reflection spatial light modulator is arranged at the advancing direction of a light beam reflected by the beam splitting cube; a light beam reflected by the reflection spatial light modulator passes through the beam splitting cube; and an analyzer, a small-hole diaphragm, a convex lens II and a CCD camera are arranged at the advancing direction of the light beam that passes through the beam splitting cube. The generation method includes the following steps that: a computer is utilized to generate a light intensity pattern containing a cone lens transmittance function and fractional-order vortex beam and plane wave interference, and the light intensity pattern is written into the reflection spatial light modulator; and the power source of the continuous wave laser is switched on, and light is reflected in the device, and the reflected light is collimated, diffracted and reproduced, so that the fractional-order perfect vortex beam can be generated. With the generation device and generation method of the invention adopted, parameter real-time, online and free adjustable and controllable fractional-order perfect vortex beams can be realized. The generation device and generation method can be widely applied to fields such as particle optical manipulation and optical testing.

The invention discloses a single focal plane high-precision testing method for optical wavefront of an optical imaging system, relates to the technical field of optical testing, solves the problems that exit pupil amplitudes are not distributed uniformly and calculation errors are introduced by fast Fourier transform in the conventional phase retrieval algorithm, and provides the scheme for eliminating the influence of vibration in the process of image acquisition on detection accuracy. The method comprises the following steps of: establishing a detection platform of the optical imaging system; detecting the position of the focal plane of a lens to be detected by using a detection device in the detection platform and acquiring an out-of-focus stellar image of the lens to be detected by the detection device; selecting effective data according to the acquired out-of-focus stellar image and calculating a pupil function of an optical system; and extracting the phase of the acquired pupil function to obtain the optical wavefront of the optical imaging system. The pupil function of the optical system is calculated by a Zernike multinomial, an extended Nijboer-Zernike multinomial, and a generalized inverse matrix. The single focal plane high-precision testing method is low in cost, and high in accuracy and is suitable for manufacturing enterprises, scientific research and detection units of the optical imaging system.

An apparatus for fiber optic testing is presented. In one exemplary embodiment, the apparatus may comprise a plurality of fiber optic connectors for coupling to one or more fiber optic cables, one or more photodetectors operatively connected to the plurality of fiber optic connectors, an optical power measurement module operatively connected to the one or more photodetectors, a display for displaying information received from the optical power measurement module, and one or more user controls for accepting user input.

An apparatus and method for performing surface microscopy of an optical device uses an optical fiber taper including a microsphere endpoint as a near field probe. A transmission fiber is disposed adjacent to the microsphere so as to evanescently couple an optical test signal into the microsphere. A series of extremely narrow whispering gallery mode (WGM) resonances are created within the microsphere, with an associated electromagnetic field radiating outward therefrom. The microsphere probe may then be moved over the surface of an optical device being analyzed (or the device translated underneath the microsphere), where any abnormalities in the surface (such as defects, scratches and the like) will perturb the electromagnetic field pattern and be reflected in changes in the measured output power from the microsphere.

The present invention provides an inspection system for inspecting a surface of an optical specimen. The inspection system includes an optical testing device having a main body and an optical axis. The optical testing device includes an optical imaging system housed in the main body. The optical imaging system includes imaging components for acquiring a microscope visual image and for acquiring at least one interference fringe image of the surface of the optical specimen. The optical testing device also includes a translational mechanism housed in the main body and configured to allow linear movement of the optical imaging system and to prevent off-axis movement of the optical imaging system.

An embodiment of the invention provides a transparent display device testing method and a device and relates to the field of display device testing. By means of the transparent display device testing method, optical testing of transparent display devices can be performed, and product performances of a transparent display device to be tested can be objectively and truly reflected. The transparent display device testing device comprises an optical measurement device and a reference substance, the optical measurement device is located on one side of the transparent display device to be tested, the reference substance is located on the other side of the transparent display device to be tested, the brightness of the transparent display device to be tested is adjustable, the optical measurement device measures display effects of the reference substance through the transparent display device to be tested, and the brightness of the transparent display device to be tested is set to be different. The transparent display device testing method and the device are suitable for measuring the transparent display devices.

The invention discloses a penetrance type filling test piece to test cam and using method, which is characterized by the following: setting the surface of the test piece as cell; arranging several concentric circles on the background; arranging digital scale on crosswise and diagonal direction; setting the center of positioning point as the center of concentric circle. This invention can finish above two optical experiments one time.

Methods and apparatuses for non-optical testing of imaging devices having an array of pixels are provided. One or more pixels are tested by setting the photoconversion device and / or a floating diffusion region to a known voltage level that is different from that used to operate the pixel during non-test operation. The pixel is then sampled and compared to an expected value.

An image sensor test pattern provides time efficient optical testing of CMOS image senors at a single luminous intensity. These test patterns include at least first and second arrays of pixels having different light-accumulating characteristics. The different light-accumulating characteristics may be achieved multiple different ways. In some cases, the photodiodes in the first array of pixels are larger than photodiodes in the second array of pixels. In other cases, the photodiodes in the first array of pixels have open holes of a first size and the photodiodes in the second array of pixels have open holes of a second size less than the first size. In still other cases, the photodiodes in the first array of pixels have colors filters of a first density (or first thickness) and the photodiodes in the second array of pixels have color filters of a second density (or second thickness) less than the first density (or first thickness).

The invention discloses a multi-channel intelligent optical testing device which comprises a light source, a light source control circuit, a wavelength calibration monitoring module and an optical switch which are sequentially connected. One output end of the optical switch is sequentially connected with a polarization controller, a 2*2 shunt and a 1*N optical splitter. One output end of the 2*2 shunt is connected with a first optical power detector, and one input end of the 2*2 shunt is connected with a second optical power detector. The other output end of the optical switch is connected with an N*N shunt, and output ends of the N*N shunt are connected with array optical power detectors in a one-to-one correspondence mode. The light source control circuit, the wavelength calibration monitoring module, the optical switch, the polarization controller, the first optical power detector, the second optical power detector and the array optical power detectors are connected with a control unit. The testing device can test optical indexes of a multi-channel module.

The invention provides a dynamic multi-star star chart simulator based on a digital micromirror device (DMD) and a simulation method thereof. The simulator consists of a data processing unit, a DMD driving and processing unit, a DMD unit, a camera lens unit and a color wheel unit; the data processing unit is connected with the DMD driving and processing unit and the color wheel unit respectively; the DMD driving and processing unit is connected with the DMD unit; and the DMD unit is connected with the camera lens unit and the color wheel unit respectively. The simulation method is divided into an open loop mode and a closed loop mode; the open loop mode comprises optical testing, circuit testing and algorithm testing of a star sensor; and the closed loop mode comprises system algorithm testing and task running. By adopting an all-digital reflective projection technology, a grey level of an image is improved, the image noise disappears, the picture quality is stable, and the digital image is very precise.

An optical fiber network test method of an optical frequency domain reflectometer, which is to use the optical testing apparatus and method of the prevent invention to combine the characters of filtering, reflecting and transmission of light of the wave reflecting unit, applying on any optical fiber test or point-to-point or point-to-multipoint optical fiber network. Thus, the optical fiber testing apprartus and method is constructed, and the goals of achieving the optical fiber network test method of the optical frequency domain reflectometer or confirming simultaneously the position of the barrier router and the barrier optical fiber connection point / end point / start point can be accomplished.

The invention discloses a method for eliminating axial distance error between an object and a CCD through a self-focusing iterative algorithm. The method comprises the following steps: establishing anaxial distance error model through a Fresnel diffraction theory, and calculating axial distance through measurement of resolution of amplitude of a restored object, that is, in the laminated imagingprocess, transmitting reconstructed images to axial-distance-different planes through Fresnel diffraction integral and calculating a Tamura coefficient at each plane, the Tamura coefficients being resolution evaluation indexes, and when the Tamura coefficient reaches a maximum value, the generated restored image being clearest; and serving the axial distance corresponding to the place as a new axial distance for the next iteration, and repeating the process until the axial distance converges, and thus accurate axial distance is obtained. The method is good in correction effect for the axial distance errors in the laminated imaging process, is fast in operation speed and is high in image restoration resolution; and the method can be applied to the field of biological microscopy and opticaltest and the like.

Methods and apparatuses for non-optical testing of imaging devices having an array of pixels are provided. One or more pixels are tested by setting the photoconversion device and / or a floating diffusion region to a known voltage level that is different from that used to operate the pixel during non-test operation. The pixel is then sampled and compared to an expected value.

A method for detecting at least one analyte in a body fluid is disclosed comprising performing an optical measurement, wherein at least one test chemical is contacts the body fluid. The test chemical is an optical test chemical adapted to perform at least one detection reaction, wherein at least one optically detectable property is changed due to the detection reaction to provide at least one optical measurement value. At least one impedance measurement is generated wherein at least one alternating electrical signal is applied to the body fluid via the impedance measurement electrodes and at least one answer signal is recorded, and at least one impedance measurement value is generated. At least one evaluation step is performed wherein at least one evaluation algorithm is used, and the optical measurement value and the impedance measurement value are used for determining a concentration of the analyte in the body fluid.

The invention discloses an LED display screen field testing apparatus comprising a pneumatic lifting rod, an air pump, an optical testing device, a reference platform, a fixing pedestal, a portable power supply, a computer, and a three-dimensional rotary holder. The pneumatic lifting rod is vertically installed on the fixing pedestal and is driven by the air pump to stretch and retract. The reference platform is horizontally installed on the top of the pneumatic lifting rod. The three-dimensional rotary holder is installed on the reference platform and is driven by a driving device to perform three-dimensional rotation. The optical testing device is installed on the three-dimensional rotary holder. The computer is used for acquiring and displaying images captured by the optical testing device in real time. By controlling the pneumatic lifting rod to ascend and descend and controlling the three-dimensional rotary holder to perform three-dimensional rotation, the optical testing device is driven to freely ascend, descend, and three-dimensionally rotate. The portable power supply supplies power to the air pump, the optical testing device, the computer, and the driving device. The testing apparatus and testing method have advantages of high testing accuracy, good environment suitability, convenient installation and transport, and high automation degree.

Embodiments herein describe techniques for testing or aligning optical components (205, 225) in a photonic chip (200) using a grating coupler (220). In one embodiment, the photonic chip (200) may include an edge coupler (205) and a grating coupler (220) for optically coupling the photonic chip to external fiber optic cables (920). The edge coupler (205) may be disposed on a side or edge of the photonic chip while the grating coupler (220) is located on a top or side of the photonic chip. During fabrication, the edge coupler (205) may be inaccessible. Instead of using the edge coupler (205) totest the photonic chip, a testing apparatus (805) can use the grating coupler (220) along with a splitter (215) to transfer optical test signals between an optical component in the photonic chip (e.g., a modulator or detector) and a test probe (505) optically coupled to the grating coupler (220).