Abstract:
PROBLEM TO BE SOLVED: To improve the S/N ratio of spectrum.SOLUTION: A spectrometer includes: integrating means for integrating M pieces of spectral data of the number N of data points obtained by repeating the same measurement M times or time domain data S1(d1-dN)-SM(d1-dN); correlation calculating means for calculating correlation between each of sets S1(dN)-SM(dN) of data points of the same ordinal number dn, included in the M pieces of the spectral data or the time domain data S1(d1-dN)-SM(d1-dN), and thereby obtain correlation data C(c1-cN) representing the strength of the correlation concerning the data points of each of the ordinal number; and calculating means for calculating the product of spectrum which is obtained by integration of the number N of the data points obtained by the correlation calculating means or expected spectra or time domain data Sav(d1-dN) with the correlation data C(c1-cN).
Abstract:
PROBLEM TO BE SOLVED: To provide an optical characteristic measuring apparatus and method capable of performing in environments where wide variations in fluctuation and temperature are encountered and regardless of the type of an object to be measured, that a measurement frequency range is wide, and that the measurement accuracy is high. SOLUTION: The optical characteristic measuring apparatus 10 comprises a non-linear optical crystal 2 which generates a pair of photons A, B and emits the photon A to an optical element 4, an optical delay circuit 6 which change the optical path difference between the photon A and the photon B, a beam splitter 5 which allows the photons A, B to transmit and reflects, mixes the reflected component of the photon A and the transmitted component of the photon B to be guided to a photon detector 7A, and mixes the transmitted component of the photon A and the reflected component of the photon B to be guided to a photon detector 7B, a coincidence counter 8 which measures the frequency of coincidence photon detection by the photon detectors 7A, 7B as a coincidence measurement ratio, and an analyzer 9 which determines a change in the coincidence measurement ratio with respect to a change in the optical path difference from the measured coincidence measurement ratio and calculates the wavelength dependence of the optical property of the optical element 4 on the basis of a value of a dip part in the change in the coincidence measurement ratio. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To quickly measure bonding of an active compound to a substrate of substance with high accuracy by measuring the transition of a reference active compound from a bonded state to the substrate in a sample to a free diffused state by a Raman correlation spectrometry. SOLUTION: The transition of at least one kind of reference active compound in a sample from a bonded state to a substrate disposed in the sample, to a free diffused state is measured by a Raman correlation spectrometry, that is, a laser 3 is coupled in the form of converging on extremely small volume in the sample by an image focusing optical system of a microscope 1. Obtained Raman light is optically separated from laser beams by a filter 5. A diffraction grating spectrometer 8 of high light transmittance spectrally separates Raman light, and an optical image focusing system 9 guarantees detection in a high sensitive detector 10 of a selected Raman band. An electric signal from the detector 10 is sent to a collimator 11 and signal-processed to determine the autocorrelation function.
Abstract:
PROBLEM TO BE SOLVED: To provide a fluorescent correlation spectroscopically analyzing method and device with a small observation space volume as required, which is simple and movable to allow observation in an area, hard to approach. SOLUTION: In a fluorescent correlation spectroscopically analyzing method and device to allow the observation of drift velocity, diffusion coefficient and volume shrinkage, excited light emitted from a light source 1 is guided to a fiber coupler 3 via the first optical fiber wave guide 2 and then to specimen 6 via the second optical fiber wave guide 4 and fluorescent light emitted from specimen particles is guided to the fiber coupler 3 via the second optical fiber wave guide 4 and then to a detector 10 via the third optical fiber wave guide 8.
Abstract:
PURPOSE: To detect the presence of an ink with a different absorption spectrum characteristic by applying rays with at least two different wavelengths while including ink absorption wavelength and detecting the reflection rays. CONSTITUTION: N LEDs(light emitting diodes) 1 generate a corresponding number of rays with different wavelengths while one portion corresponds to the inside of visible rays, one portion corresponds to the outside of the visible rays, and one corresponds to the absorption band of ink and apply them to a document 2. A sequence generator 5 generates each modulation signal that is supplied to each LED 1 and each LED 1 generates modulated light beams. A detector 3 receives rays reflected from the document and the output signal is supplied in parallel to a multiplication circuit 6 where a modulation signal from the sequence generator 5 that corresponds to the related LED 1 is supplied. Further, an output signal from a multiplier 6 is supplied to a microprocessor 9 via an integral circuit 8 and an output signal related to ink is calculated and is outputted to an output device 10.
Abstract:
PURPOSE:To obtain high sensitivity by using a nonlinear optical material with an electrode which detects an overlap part of light as a nonlinear optical material, eliminating the need for phase matching, an obtaining a signal directly as an electric signal. CONSTITUTION:A light beam 1 to be measured is split into two by a beam splitter 2, one is reflected by a mirror 5, and the other is delayed by an optical delay part 3 and then superposed again by a beam mixer 4. This is converged by a lens 6 on the nonlinear material 10 with the electrode. A voltage with depends upon the intensity of the incident light is induced, so this is amplified by an FET preamplifier 7 and a voltage amplifier 8 and its time mean value is calculated by an integrator 9 and inputted to an X-Y recorder 11 as long-axis data. Here, the lateral axis is assigned to an optical delay quantity and a sweep is made to obtain the autocorrelation function of light pulses. Consequently, the need for position matching eliminated and the signal is obtained directly as the electric signal. Thus, the high sensitivity is obtained.