Abstract:
This disclosure relates to a method for measuring the concentrations of sugars in liquids by the use of near infrared as well as an apparatus for practicing said method. The method comprises a step wherein the absorption spectrum of the sugar under investigation existing at a first depth relatively close to the surface in a sample (15) is computed by using relatively weak power of near infrared, a step wherein the absorption spectrum of the sugar under investigation existing at a relatively deep second depth in the sample (15) is computed by using relatively strong power of infrared, and a step wherein the concentration of the sugar under investigation in the sample (15) is determined by computing the absorption spectrum of the sugar at a different depth between said first and second depths on the basis of the results of measurement in said first and second steps. The wavelengths for the use for said absorption spectrum are selected from anyone of wavelength bands of 950-1,150 nm, 1,150-1,300 nm, and 1,300-1,450 nm. Since, according to this method, wavelengths which are shorter and closer to the visible region than in the prior art are used, the method enables the measuring light beams to penetrate deeper in a living tissue and makes it possible to measure the concentrations of sugars existing in a deeper region non-invasively.
Abstract:
PROBLEM TO BE SOLVED: To provide an image sensor and an imaging apparatus suitable for obtaining both of an image having a high frame rate and that having high image quality when capturing a one-frame image, and to provide a state inspection system having the imaging apparatus. SOLUTION: The state inspection system 1 comprises: the imaging apparatus 100 for reading a pixel signal N times nondestructively from each pixel at a frame rate N times larger than the standard and generating standard picked-up image data corresponding to a standard exposure time based on the read pixel signal and high-speed picked-up image data corresponding to first to N-th subframe periods each, where a standard frame period is divided into N according to N reads; a lighting system 200 for lighting an object to be inspected; and an information processor 400 that controls the quantity of light in the lighting system 200 based on the standard picked-up image data, detects tint and texture in the object to be inspected, and detects the shape and movement of the object to be inspected based on the high-speed picked-up image data. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
본 발명은 최급경사 알고리즘을 이용한 비전시스템의 컬러 조명 제어방법에 관한 것으로서, 더욱 상세하게는 카메라 영상을 그레이 레벨에서 분석하여 최대 선명도(sharpness)를 갖는 지점을 미분에 기반한 최급경사(steepest descent) 알고리즘을 적용함으로써 최적 조명 조건을 최단 시간에 자동으로 설정하는 방법에 관한 것이다. 본 발명의 실시예에 따른 최급경사 알고리즘을 이용한 비전시스템의 컬러 조명 제어방법은, 카메라에 입사된 검사 대상물 이미지로부터 디지털 이미지를 획득하여 그레이 레벨 이미지로 변환하는 단계와, 상기 그레이 레벨 이미지의 선명도를 연산하는 단계와, 상기 선명도와 구동 전압 관계를 이용하여 -선명도와 비용 함수 관계를 정의하는 단계와, 상기 조명의 다음 구동 전압을 비용 함수의 미분을 이용해 계산하고, 상기 구동 전압 계산에 필요한 수렴 계수를 연산하며, 연산 오차를 계산하는 최급경사 연산 단계와, 상기 구동 전압에 대한 경계조건을 판별하는 단계 및 상기 단계를 종료조건이 만족할 때까지 반복하는 단계를 포함하여 구성된다.
Abstract:
본 발명에 따르면 테라헤르츠파를 이용하여 그래핀의 산화, 환원 영역을 빠른 시간 내에 정확하게 탐지하여 전도성을 측정할 수 있어 그래핀 전도성 검사 시간을 줄일 수 있다. 또한, 그래핀에 산화 영역이 존재하면 바로 전자기파를 조사하여 환원시킴으로서 전도성을 높여 수리 시간을 최소화할 수 있다.
Abstract:
According to the present invention, oxidized and reduced regions of graphene can be accurately detected in a short time using a terahertz wave so as to measure the conductivity of graphene, and thus the time required to test the conductivity of graphene can be reduced. In addition, when an oxidized region exists in graphene, the oxidized region can be immediately reduced by irradiating an electromagnetic wave thereto so as to increase the conductivity of graphene and thus minimize the time required to restore graphene.
Abstract:
A LIBS analyzer and method includes a laser configured to produce a plasma on a sample at a focal point on the sample and a spectrometer responsive to radiation emitted from the plasma and configured to produce an output spectrum. A detector is positioned to detect low intensity pre-firing radiation produced by the laser and reflected off the sample from the focal point. The intensity of the low intensity pre-firing radiation is compared to a predetermined minimum and the laser pump sequence is halted if the intensity of the low intensity pre-firing radiation is less than the predetermined minimum.
Abstract:
A LIBS analyzer and method includes a laser configured to produce a plasma on a sample at a focal point on the sample and a spectrometer responsive to radiation emitted from the plasma and configured to produce an output spectrum. A detector is positioned to detect low intensity pre-firing radiation produced by the laser and reflected off the sample from the focal point. The intensity of the low intensity pre-firing radiation is compared to a predetermined minimum and the laser pump sequence is halted if the intensity of the low intensity pre-firing radiation is less than the predetermined minimum.
Abstract:
A LIBS analysis method and apparatus wherein multiple laser firings in a burst mode are produced to clean a location on the sample. Subsequently. for data collection, pumping the laser produces one or more analysis laser firings and when such a laser firing is detected, the laser pumping stops and the method includes initiating a delay period of time after which the spectrometer is triggered to begin analysis of the resulting plasma produced on the sample.
Abstract:
An apparatus of measuring a small scale property of a sheet, the apparatus includes: a first light source for illuminating the sheet moving with respect to the illumination; a detector for forming a total intensity of reflection of the light illuminating the moving sheet by each detection; a detected dimension of the reflection on the sheet in the direction of the movement being limited the same as or shorter than a lowest acceptable spatial resolution of the measurement; a duration of each detection being equal to or shorter than the lowest acceptable spatial resolution divided by a speed of the moving sheet; and a processing unit for forming information about a small scale variation of gloss of the sheet on the basis of the detections by the detector.