• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An improved optical system is disclosed for rapid, accurate spectral analysis of the reflectivity or transmissivity of samples. A concave holographic diffraction grating oscillated at high speed is utilized to provide a rapid scanning of monochromatic light through a spectrum of wavelengths. The grating is positively driven at very high speed by a unique cam drive structure comprising identically shaped conjugate cams. The rapid scan by the grating enables the reduction of noise error by averaging over a large number of cycles. It also reduces the measurement time and thus prevents sample heating by excessive exposure to light energy. A filter wheel having dark segments for drift correction is rotated in the optical path and is synchronous with the grating. Source optics is employed to optimally shape the light source for particular applications. The system optics further includes a unique arrangement of lenses, including cylindrical lenses, to obtain the best light source shape which results in maximum light throughput. Fiber optics are also employed and arranged to meet the optimum requirements of the system for light collection and transmission through portions of the optical system.
    公开号:SU961570A3
    申请号:SU782660851
    申请日:1978-08-16
    公开日:1982-09-23
    发明作者:Дж. Ланда Исаак
    申请人:Неотек Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    (54) SPEED SPECTRUM ANALYZER
    I
    This invention relates to spectral instrumentation.
    Spectrum analyzers containing narrow-band optical filters, alternately crossing the radiation of a wide-band light source fl, are known.
    However, this device does not provide sufficient accuracy.
    The closest technical solution is a device containing. u successively located along the beam source the light source, the optical system for filling the entrance slit with the source light, the entrance slit, the concave holographic diffraction grating, the exit into the entrance slit, the modulator, the optical system for designing the light radiation on the sample, the photosensitive device for detecting light radiation, as well as a device for communicating the oscillatory motion of the diffraction grating and a device for rotating the C 2 J modulator.
    However, this device is characterized by insufficient measurement accuracy. 26
    The purpose of the invention is to improve the accuracy of the analysis.
    权利要求:
    Claims (2)
    [1]
    This goal is achieved by the fact that in a high-speed spectrum analyzer containing an illumination source arranged sequentially, an optical system for filling the entrance slit with source light, an entrance slit, a concave holographic diffraction grating, an output slit, a modulator, an optical system for designing light radiation on a sample , a photosensitive device for detecting light radiation, as well as a device for communicating oscillatory motion to the grating and a device for rotating the modulator , the modulator is made in the form of a disk, which is a band-pass filter, the transmittance of which varies linearly with the angular position of the disk and contains at least one light-proof segment, and the device for rotating the modulator is synchronized with the device for communicating the oscillatory motion of the diffraction the grating in such a way that the extreme positions of the oscillating diffraction grating coincide in time with the placement in the network beam of the opaque segment of the modulator. FIG. I shows a speed spectrum analyzer for measuring reflection spectra; in fig. 2 shows a modification of a spectrum analyzer for measuring reflection spectra with a device for collecting radiation on fiber optics; in fig. 3 modifications of the spectrum analyzer for measuring transmission spectra on fiber optics; in fig. 4 - a variant of the modulator used in the device; in fig. 5 modification of the spectrum analyzer for measurement. reflection spectra with the installation of the sample between the source and the grating; in fig. 6 is a modification of a spectrum analyzer for measuring transmission spectra with sample placement between a source and a grating. The spectrum analyzer contains FIG. 1) radiation source 1, reflector 2, spherical lens 3, neutral filter 4, polarizer 5, cylindrical lens 6, entrance slit 7, concave holographic. diffraction grating 8, exit slit 9, modulator 1O, cylindrical lens 11. mirror mirror 12 Spherical lens 13. iris diaphragm 14. planar mirror 15, spherical lens 16 sample 17. photo receivers 18. Modification of the device (Fig. 2) contains a conical support element 19, optical fibers 2O, the ends of which are fixed in a conical support element, focusing optics 21. A modification of the device in FIG. 3, contains a diffusion reflector 22. Modulator 1O. shown in FIG. 4. is a band-pass filter, the transmittance of which in the segments 23 varies linearly with the angular position of the disk and the segments 24 are opaque. The modification of the spectrum analyzer in FIG. 5 and in is distinguished by the arrangement of the elements. The device works as follows. The radiation from source 1 is collected by a spherical lens 3 at the entrance slit 7. A cylindrical lens 6 ensures uniform filling of the entrance slit 7 and, therefore, the diffraction grating 8 If necessary, a neutral light filter 4 and a polarizer 5 can be placed in the luminous flux in a way. That image04 filament lamp is located directly next to the thread itself, thereby doubling the length or width of the filament. Passing the entrance slit 7, the radiation enters the concave holographic grating 8 and decomposes into a spectrum. The grating motion is synchronized with the rotation of the modulator 1O in such a way that the extreme positions of the oscillating diffraction grating coincide in time with the optic segment 24 placed in the light beam (Fig. 4) modulator of the torus. The design of monochromatic radiation on the sample is carried out using a cylindrical lens 11, spherical lenses 13 and 16, and flat mirrors 12 and 15. The iris diaphragm 14 cuts out a portion of the light beam with uniform intensity. Monochromatic radiation at each moment of time hits the sample 17, diffusely reflected and perceived by photodetectors 18. In the case of using fiber optics to collect radiation (Fig. 2), a conical supporting element 19 is used, in which the ends of the 2O optical fibers are fixed along the entire conical the surface of the element 19. Diffuse reflected radiation at. using optical fibers 20 and focusing optics 21 is assembled on a photodetector 18. When receiving reflection spectra using fiber optics (Fig. 3), the conical support element 19 contains a diffuse reflector 22, and sample 17 is installed directly in front of the conical support element 19. The sample lighting system and emission reset can be installed in front of the dispersing element. In this case (Fig. 5), the radiation from the source passes the lens 3. The iris diaphragm 14, the neutral filter 4, the flat mirror 15 and the spherical lens 16. hits the sample 17 placed on the conical support element 19. The radiation diffused from sample 17 using light guides 20, the second ends of which are assembled in the form of a rectangular slit, hits an oscillating concave holographic diffraction grating 8 and then passes the output slit 9 and the modulator 10. is directed to the photodetector. Elements are arranged in the same way when obtaining the sample transmission spectra (Fig. 6). 596 claims A high-speed spectrum analyzer comprising an illumination source arranged successively along the beam, an optical system for filling the entrance slit with source light, an entrance slit, a concave holographic diffraction grating, an output slit, a modulator, an optical system for projecting light radiation onto a sample, a light-sensitive device for light detection, as well as a device for communicating the oscillatory motion of the diffraction grating and a device for rotating the mode torus, wherein u and with the fact that s. the aim of analyzing the accuracy of the analysis, the modulator is made in the form of a disk, which is a band of 0 filter, the transmittance of which varies linearly depending on the angular position of the disk, and contains at least one lightproof segment, and the device for rotating the modulator is synchronized with a device for imparting oscillatory motion of the diffraction grating in such a way that the extreme positions of the oscillating diffraction grating coincide in time with the placement of an opaque in the light beam modulator segment. Sources of Information taken into account in the examination 1. US patent number 4O3797O, cl. GO1 J 3/48, 1977.
    [2]
    2. Tarasov KI Spectral devices. L., Mechanical Engineering, 1968,. with. 281 - 283.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU961570A3|1982-09-23|High-speed spectroanalyzer
    US4264205A|1981-04-28|Rapid scan spectral analysis system utilizing higher order spectral reflections of holographic diffraction gratings
    CA2018858C|1994-05-31|Optical read head for immunoassay instrument
    US4076421A|1978-02-28|Spectrophotometer with parallel sensing
    US2823577A|1958-02-18|Multiple slit spectrograph for direct reading spectrographic analysis
    CA2019015C|1996-02-06|Optical read system and immunoassay method
    KR20060025402A|2006-03-21|Optical system for multi-channel sample analyzer and analyzer employing the same
    SU1433425A3|1988-10-23|Grating monochromator
    EP0431368B1|1994-07-27|System to reduce wave shift error in spectrophotometer caused by hot spots in the light source
    JP3871415B2|2007-01-24|Spectral transmittance measuring device
    JPS57144446A|1982-09-07|Apparatus for spectrochemical analysis
    RU2176384C1|2001-11-27|Chart board photometer |
    SU521504A1|1976-07-15|Turbidometer-transparent number
    SU1366923A1|1988-01-15|Spectrofluorimeter
    SU1312511A1|1987-05-23|Gartman transducer
    CA1129692A|1982-08-17|Holographic diffraction grating system for rapid scan spectral analysis
    KR890001688B1|1989-05-13|Color-measuring spectrophotometer system for source
    JP2004093322A|2004-03-25|Analysis / measurement light source
    SU765668A1|1980-09-23|Multiplexor spectrometer
    JPH11508053A|1999-07-13|Analysis system
    SU211825A1|PHOTOELECTRIC DEVICE FOR RESEARCH
    Spruit1971|Sensitive quasi-continuous measurement of photo-induced transmission changes
    SU1456794A1|1989-02-07|Method of forming light spot on specimen in measurement of indicatrix of diffusion on goniophotometer
    RU1777054C|1992-11-23|Concentration meter
    SU361720A1|1974-04-15|In P
    同族专利:
    公开号 | 公开日
    GB2057162B|1982-10-13|
    FR2400695B1|1983-11-10|
    GB2057162A|1981-03-25|
    US4285596A|1981-08-25|
    CA1103074A|1981-06-16|
    JPS6331730B2|1988-06-27|
    JPS5443082A|1979-04-05|
    FR2400695A1|1979-03-16|
    GB2002921B|1982-05-26|
    GB2002921A|1979-02-28|
    HU182910B|1984-03-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE634758A|
    US2602368A|1950-09-13|1952-07-08|Gen Electric|Color matching apparatus|
    US2679013A|1950-09-13|1954-05-18|Gen Electric|Fourier curve analyzing and integrating apparatus|
    US3216313A|1961-06-23|1965-11-09|Bausch & Lomb|Monochromator of the type having a plane grating therein|
    US3090863A|1962-01-31|1963-05-21|Mcpherson Instr Corp|Monochromator adapted for use in the ultra-violet region|
    US3472595A|1965-06-15|1969-10-14|Shimadzu Corp|Diffraction grating spectrophotometer|
    JPS4318156Y1|1965-08-30|1968-07-26|
    US3447873A|1966-03-10|1969-06-03|Beckman Instruments Inc|Filter grating monochromator|
    US3563656A|1966-04-15|1971-02-16|Charles C Helms|Monochromator wavelength drives|
    JPS4532940Y1|1967-03-09|1970-12-15|
    US3578845A|1968-02-12|1971-05-18|Trw Inc|Holographic focusing diffraction gratings for spectroscopes and method of making same|
    US3614227A|1969-07-25|1971-10-19|Cary Instruments|Grating drive mechanism|
    US3836254A|1969-12-15|1974-09-17|Barringer Research Ltd|Optical correlator with optimized maximum and minimum correlation masks|
    US3765775A|1972-03-15|1973-10-16|Neotec Corp|Optical internal quality analyzer|
    US3861788A|1972-08-24|1975-01-21|Neotec Corp|Optical analyzer for agricultural products|
    US3885879A|1973-06-25|1975-05-27|Fisher Scientific Co|Dual beam spectrophotometer utilizing a spectral wedge and bifurcated fiber optic bundle|
    US3877818A|1974-01-28|1975-04-15|Us Agriculture|Photo-optical method for determining fat content in meat|
    JPS591971B2|1975-03-26|1984-01-14|Hitachi Ltd|
    US3999860A|1975-10-10|1976-12-28|International Business Machines Corporation|Apparatus for textile color analysis|
    US4068954A|1976-01-09|1978-01-17|Instruments S.A.|Monochromator having a concave holographic grating|
    US4030829A|1976-04-12|1977-06-21|Varian Associates|Keying waveform generator for spectrophotometer|
    US4070111A|1976-06-10|1978-01-24|Nicolas James Harrick|Rapid scan spectrophotometer|US4305662A|1980-04-21|1981-12-15|Leeman Labs, Inc.|Sample excitation situs enhancement apparatus for a spectrometer|
    DE3215879A1|1982-04-29|1983-11-03|Fa. Carl Zeiss, 7920 Heidenheim|DEVICE FOR SPECTRUM MEASUREMENT IN THE BLOOD RAIL|
    US4487504A|1982-09-01|1984-12-11|Pacific Scientific Instruments Company|Reflectance measuring instrument with integrating sphere|
    JPS5961723A|1982-10-01|1984-04-09|Matsushita Electric Ind Co Ltd|Light spectrum analyzer|
    US4540282A|1983-03-21|1985-09-10|Isaac Landa|Apparatus for optically analyzing a sample|
    US4565447A|1983-11-21|1986-01-21|Millipore Corporation|Photometric apparatus with multi-wavelength excitation|
    FR2581190B1|1985-04-25|1987-06-19|Elf France|INTERFEROMETRIC GAS DETECTOR|
    US4804266A|1985-07-26|1989-02-14|Barspec Ltd.|Continuously rotating grating rapid-scan spectrophotometer|
    US4883963A|1986-04-28|1989-11-28|Bran+Luebbe Gmbh|Optical analysis method and apparatus having programmable rapid random wavelength access|
    US5040889A|1986-05-30|1991-08-20|Pacific Scientific Company|Spectrometer with combined visible and ultraviolet sample illumination|
    US4752130A|1986-10-24|1988-06-21|The University Of Rochester|Optical systems utilizing a volume transmission diffraction element to provide wavelength tuning|
    US4830493A|1987-10-29|1989-05-16|Beckman Instruments, Inc.|UV scanning system for centrifuge|
    JPH0232803A|1988-07-21|1990-02-02|Shiro Tomita|Manufacture of decorative veneer|
    US5184193A|1989-01-04|1993-02-02|Guided Wave|Dual fiber optic spectrophotometer|
    US4997281A|1989-08-24|1991-03-05|Stark Edward W|Grating spectrometer|
    US5055684A|1989-12-06|1991-10-08|Nirsystems Incorporated|System to reduce wave shift error in spectrophotometer caused by hot spots in the light source|
    JPH0650814A|1990-01-30|1994-02-25|Seca Corp|Multispectral reflectometer|
    US5262840A|1990-01-30|1993-11-16|Sequa Corporation|Multispectral reflectometer|
    US5020909A|1990-03-02|1991-06-04|Landa Issac J|"In-line" spectral reference method for spectrometers|
    US5039855A|1990-03-05|1991-08-13|Bran+Luebbe Analyzing Technologies, Inc.|Dual beam acousto-optic tunable spectrometer|
    EP0551430A4|1990-10-03|1994-08-03|Abbott Laboratories|
    US5210590A|1992-02-18|1993-05-11|L. T. Industries, Inc.|Rapid scanning spectrographic analyzer|
    US5303028A|1992-08-24|1994-04-12|Eastman Kodak Company|Spectrometer apparatus for calibrating color imaging apparatus|
    US5589717A|1993-01-11|1996-12-31|Instruments Sa, Inc.|Compact spectrum analyzer module|
    WO1997025915A1|1996-01-16|1997-07-24|Diasense, Inc.|Methods and apparatus for non-invasive glucose sensing: spectrograph|
    US5652654A|1996-08-12|1997-07-29|Asimopoulos; George|Dual beam spectrophotometer|
    US6587196B1|2000-01-26|2003-07-01|Sensys Medical, Inc.|Oscillating mechanism driven monochromator|
    US6534768B1|2000-10-30|2003-03-18|Euro-Oeltique, S.A.|Hemispherical detector|
    US6862091B2|2001-04-11|2005-03-01|Inlight Solutions, Inc.|Illumination device and method for spectroscopic analysis|
    US6864490B1|2002-06-27|2005-03-08|James H. Underwood|Reflectometer device|
    US7483134B2|2005-02-10|2009-01-27|Unity Scientific, Llc|Scanning monochromator with direct drive grating|
    US20100052201A1|2008-03-03|2010-03-04|Microgreen Polymers, Inc.|Foamed cellular panels and related methods|
    US8436296B2|2009-11-06|2013-05-07|Precision Energy Services, Inc.|Filter wheel assembly for downhole spectroscopy|
    US8164050B2|2009-11-06|2012-04-24|Precision Energy Services, Inc.|Multi-channel source assembly for downhole spectroscopy|
    US8735803B2|2009-11-06|2014-05-27|Precision Energy Services, Inc|Multi-channel detector assembly for downhole spectroscopy|
    CN102269858A|2010-06-02|2011-12-07|北京智朗芯光科技有限公司|Automatic focusing system and automatic focusing method|
    US8411262B2|2010-09-30|2013-04-02|Precision Energy Services, Inc.|Downhole gas breakout sensor|
    US8542353B2|2010-09-30|2013-09-24|Precision Energy Services, Inc.|Refractive index sensor for fluid analysis|
    US8786855B2|2011-01-25|2014-07-22|Ocean Optics, Inc.|Shaped input apertures to improve resolution in grating spectrometers|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/825,155|US4285596A|1977-08-16|1977-08-16|Holographic diffraction grating system for rapid scan spectral analysis|
    [返回顶部]