131results about "Material analysis by optical means" patented technology

Systems and techniques for an optical scanning microscope and/or other appropriate imaging system includes components for scanning and collecting focused images of a tissue sample and/or other object disposed on a slide. The focusing system described herein provides for determining best focus for each snapshot as a snapshot is captured, which may be referred to as “on-the-fly focusing.” The devices and techniques provided herein lead to significant reductions in the time required for forming a digital image of an area in a pathology slide and provide for the creation of high quality digital images of a specimen at high throughput.

The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions.

Techniques for monitoring the quality (e.g., optical and mechanical properties) in optical waveguides (e.g., photonic crystal fibers) are disclosed. Additionally, techniques for detecting and localizing defects in the waveguides are also described. Pulses of light are launched into one end of an optical waveguide. The amount of light scattered out of the same end of the waveguide (i.e., a backscattered or reflected signal) is monitored at certain wavelengths specific to the spectral characteristics of the waveguide. Transmission characteristics and defect localization can be determined from the backscattered signal.

An optical scanning apparatus includes light sources, an aperture having, and coupling lenses. Numbers of the light sources and the coupling lenses are equal to each other and the apparatus satisfies an inequality 12.7 <(D×β₀×m₀×xdpi)/(2×NA) <38.1 and an equation β₀=(β₊−β₋)/(n−1), wherein D represents a width of the slit of the aperture, β₀represents a beam open angle, mo represents a total lateral magnification ratio, dpi represents a number of dots per inch, NA represents a numerical aperture, β₊ represents a positive open angle, β₋ represents a negative open angle, and n represents the number. Further, an image forming apparatus using this optical scanning apparatus and an image forming method are provided.

Various pipe inspection systems include a camera head operatively connected to the distal end of a push-cable. Images may be automatically captured at predetermined distances of travel, or may be automatically captured based on the output signals from the auto-focus, auto-exposure and/or auto-white balance engines indicating, for example, that the camera motion within the pipe is substantially zero. Images may be captured in an automatic mode at predetermined intervals as the camera head travels within the pipe or in an override mode initiated by operator command. The system may include a data transmission circuit that transmits data between a plurality of nodes at a frequency that does not substantially interfere with a normal base band video transmission frequency.

An optical biosensor pixel for detecting the amount of light that is generated by the biosensing process and a biosensor array architecture that includes such biosensor pixels. The optical biosensor pixel includes a photodiode configured to convert an incident photon flux into a current. Additionally, the optical biosensor pixel includes an optical filter configured to select specific wavelengths and/or photon flux angles to reach the photodiode from a biological sample. The biosensor pixel further includes a trans-impedance amplifier coupled to the photodiode, where the trans-impedance amplifier is configured to convert the current into a voltage signal. Additionally, the biosensor pixel includes a 1-bit comparator coupled to the trans-impedance amplifier and a 1-bit digital-to-analog converter coupled to the 1-bit comparator, where the 1-bit digital-to-analog converter injects different levels of charge into an input of the trans-impedance amplifier at each cycle based on an output of the 1-bit comparator.

An opto-electronic converter includes a plurality of light-receiving elements configured to convert light of different colors into analog signals, each of the analog signals representing a pixel, an amplifier unit configured to amplify the analog signals, into which the light is converted by the light-receiving elements, in each pixel group, the pixel group including a plurality of the light-receiving elements, the plurality of light-receiving elements converting light of different colors, and a gain switch unit configured to switch, for each of the light-receiving elements included in the pixel group, a gain of the amplifier unit to a gain determined in advance depending on a color of the light converted by the light-receiving element.

A large convoluted space, such as a multi-story concourse of an airport is isolated and a chemical or biological agent in the concourse is deactivated. A plurality of deactivation gas sources (100) introduce a deactivation gas at multiple points along the concourse. Fans (66, 106) circulate the deactivation gas, sensors (110) sense concentrations of the deactivation gas at numerous points around the concourse and exhaust fans (66) exhaust air, spent deactivation gas, and some deactivation gas. A control processor (84) controls the generators, the circulation fans, and the exhaust fans in accordance with the gas concentrations sensed by the sensors to increase and decrease deactivation gas concentration in selected subregions of the concourse by increasing or decreasing generation, increasing or decreasing exhausting, or altering flow patterns among subregions.

In accordance with the present approach, a dark current is measured for one or more detector elements and used to determine a gain or gain compensation for the respective detector elements. In certain embodiments, the dark current is used to determine a temperature for the respective detector element and the temperature is used to determine the gain or gain compensation. In other embodiments, the dark current is used to calculate the gain or gain compensation for the respective detector element without calculating an intermediate temperature value, such as via the use of a transfer function.

The invention discloses a stacking glass bottle detection method based on machine vision and a transporter based on the method. The detection method comprises the following steps: firstly, obtaining a bottle mouth image sent into a bottle collecting zone via a conveyor belt; then, performing image processing on the obtained bottle mouth graph so as to indentify whether the glass bottle in the current bottle collecting zone has abnormal situation or not; and if yes, giving an alarm. The transporter comprises a glass bottle conveyor belt, a travelling crane provided with a gasbag-type grappling fixture lifting gear and a fastening frame, a camera and a stand column rack, wherein the bottle collecting zone is directly below the fastening frame and is connected with the conveyor belt; a longitudinal guide rail and a horizontal guide rail which can move along the longitudinal guide rail are arranged in the bottle collecting zone; the camera used for collecting glass bottle images in the bottle collecting zone is arranged on the horizontal guide rail; and the lens of the camera is downwards vertical to the bottle collecting zone and is connected with a computer for processing images. The invention is easy to apply, has high degree of automation, high efficiency and wide industrial application prospect.

There is provided an optical member comprising: a first optical layer having: a first main face formed with a concave section having a concave curved surface, and a plurality of convex ridges having concave curved surfaces provided in concentric circular fashion around said concave section; and a second main face formed with: a convex section having a convex curved surface that is provided facing the concave section and constituting a second main face facing the first main face; and a plurality of convex ridges having convex curved surfaces provided facing the plurality of convex ridges having the concave curved surface, provided in concentric circular fashion around the convex section; and a second optical layer provided on the first main face of the first optical layer; and a third optical layer provided on the second main face of the first optical layer; wherein the refractive index of the first optical layer is higher than the refractive index of the second optical layer and is higher than the refractive index of the third optical layer.

Thermographic imaging equipment is incorporated directly into cabinets housing electrical switchgear to provide for dedicated, nearly continuous monitoring of the contained equipment. A mechanical scanning technique may allow low-cost sensors to provide essentially continuous thermographic monitoring. Dedicated thermal imaging equipment allows automatic analysis through predefined temperature threshold maps.

A catadioptric projection objective for microlithography has at least one curved mirror that is deformable and adjusting elements that can deform the deformable mirror. The adjusting elements are matched to given image errors and their correction. The invention is suitable for astigmatism, fourfold wavefront-deformations due to lens heating, compaction, and the like.

A photoacoustic imaging apparatus includes a detector that outputs detection signals by detecting acoustic waves generated at surfaces and an inner portion of a sample by irradiating the sample with light; and a signal processing unit that generates image data using the detection signal. The signal processing unit calculates an average sound speed in the inner portion of the sample by using the detection signal of the acoustic wave generated at the surface of the sample and propagated through the inner portion of the sample, and generates the image data using the average sound speed and the detection signal of the acoustic wave generated at the inner portion of the sample.

A method for analyzing formation fluid in a subterranean formation is disclosed, wherein the method includes the steps of: adding a scavenger compound to an analytical reagent to form a reagent solution; collecting an amount of formation fluid into a formation tester, wherein the formation tester includes at least one fluids analyzer comprising at least one probe, at least one flow line, at least one reagent container, and at least one spectral analyzer, wherein the fluids analyzer is configured such that the collected formation fluid is fed through the at least one flow line to the at least one spectral analyzer; mixing an amount of the collected formation fluid with an amount of the reagent solution to form a mixture; and analyzing the mixture downhole.

The present invention provides a method for determining arc discharge as well as failure of mechanical vibration and abnormal displacement in power equipment using acoustic energy feature. Here, acoustic energy feature is firstly introduced to realize real-time, online inspection of failure in power equipment, enabling qualitative determination of discharge as well as mechanical vibration and abnormal displacement, so as to improve early warning before damage. Two factors, in which one is early detection of discharge, and the other is early detection of mechanical vibration and abnormal displacement, are considered. When abnormality of any one of these factors is emerged, it is demonstrated that hidden trouble is presented. Here, acoustic energy feature is used to perform real-time, online monitoring. Due to reliable diagnosis and strong interference resistance provided by sound source signals, the operating condition in which the equipment is situated may be reflected clearly, avoiding damage to electric power grid.

In an infrared detection sensor according to the present invention, all material constituting an upper portion of a sensing electrode in a supporting arm region is removed so that a supporting arm has low thermal conductivity. As a result, thermal conductivity of the infrared sensor structure is reduced, and the infrared detection sensor has excellent sensitivity.

The present invention relates to a flow cytometer, comprising a light source, a light beam shaping module for collimating and converging a light beam emitted from the light source so that the light beam irradiates samples to be detected, a sample generation unit, which comprises a gas-liquid transmission controlling module and a flow chamber that are interconnected, and a signal processing unit, for collecting, photoelectrically converting and analyzing the scattered beam emitted from the flow chamber. The light beam shaping module comprises a first cylindrical lens and a second cylindrical lens for respectively converging the light beams in two directions. In the present invention, the spot converged at the cell-interrogation zone of the flow chamber is flattened to avoid instability of the fluid which in turn leads to instability of the excited optical signal, and consequently the stability and reliability of the system are improved.

A method and apparatus for recalibrating a liquid lens. In one embodiment, a lens holder is provided to adjust the focal length of the lens as a function of temperature. In another embodiment, a recalibration circuit including a second lens of similar characteristics to the imaging lens is used to determine an appropriate focus. In other embodiments, an open loop calibration process is used.

A periodic defect detecting device comprises a sensor (4), small area selecting means (72, 74), an evaluation index calculating means (76), set value varying means (73, 75), and a period determination means (77). The small area selecting means (76) determines positions of small areas, the area lengths of which are smaller than that of an area, so that distance intervals between adjacent small areas are all equal, in the direction of arrangement of periodic defects, and selects signals corresponding to the positions of the plurality of small areas from the sensor output. The evaluation index calculating means (76) calculates the evaluation index of the mutual similarity of the signal patterns between the plurality of signals selected by the small area selecting means. The set value varying means (73, 75) vary the positions and distance intervals of the small areas to repeat the operation processing of the small area selecting means and the evaluation index calculating means. The period determination means (77) determines the distance intervals as periods when the evaluation index is higher than a preset value. A periodic defect detecting method comprises a signal input step, a small area selecting step, an evaluation index calculating step, a set value varying step, and a period determination step.

The invention relates to the technical field of workpiece appearance inspection, in particular to a mobile phone appearance inspection system which comprises a conveying system and an appearance datacollecting device. The conveying system comprises a conveying device and a carrier. The carrier is placed on the conveying device for carrying a product to be inspected. The conveying device comprisesan upstream conveying unit, a middle conveying unit and a downstream conveying unit. The middle conveying unit comprises an upper conveying device and a lower conveying device, and the upstream conveying unit and the downstream conveying unit can move up or down to the height of the upper conveying device and the lower conveying device. The appearance data collecting device comprises a surface inspection module, a line scanning module, a corner inspection module, a side inspection module and an arc surface inspection module. The line scanning module, the angle inspection module, the arc surface inspection module and the side inspection module are distributed around the surface inspection module, and the angle inspection module is located between the line scanning module and the side inspection module. The mobile phone appearance inspection system can improve the inspection efficiency and is beneficial to industrial production.

The invention discloses a high-precision detection method for SBS (styrene butadiene styrene) contents in SBS modified asphalt. The high-precision detection method includes the steps: preparing various SBS modified asphalt with the known SBS contents; respectively testing an infrared spectrum based on Fourier transformation for the SBS modified asphalt, calculating a specific value A of a characteristic absorption peak area A1 of an SBS modifying agent in the SBS modified asphalt and the sum of the characteristic absorption peak area A1 of the SBS modifying agent and a characteristic absorption peak area A2 of base asphalt, and building a standard curve equation of A values of the SBS modified asphalt corresponding to the SBS contents; testing the SBS modified asphalt to be detected by the aid of the infrared spectrum based on Fourier transformation, calculating corresponding A values, and substituting the corresponding A values into the standard curve equation to obtain the SBS contents in the SBS modified asphalt to be tested. The high-precision detection method has the advantages that the detection method is simple, the influence of the thickness of a modifying asphalt test sample on a test result is eliminated by the aid of the specific value of the characteristic absorption peak areas, section between characteristic absorption peak areas of an original creation infrared spectrum is selected, and the SBS contents in the SBS modified asphalt are rapidly and precisely detected.