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    2.
    发明专利
    未知

    公开(公告)号：ITTO910492D0

    公开(公告)日：1991-06-28

    申请号：ITTO910492

    申请日：1991-06-28

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GRECO GIORGIO ,  TALLONE LUIGI

    IPC: G01J3/12 ,  G01J3/26

    Abstract: The radiation to be analysed is sent onto an interference filter (6) which selects different portions of the radiation spectrum in correspondence with different incidence angles. The intensity values of the radiation outgoing from the element (6) are stored by a measuring and data processing unit (9) which processes such values with the transfer function of the element to obtain the information on the spectrum.

    3.
    发明专利
    未知

    公开(公告)号：IT1184100B

    公开(公告)日：1987-10-22

    申请号：IT6737885

    申请日：1985-04-23

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GRECO GIORGIO

    IPC: G01J4/04 ,  G01N21/21 ,  G01J

    Abstract: A static interferometric ellipsometer, wherein a source (3) generates a coherent light-beam with two monochromatic radiations at slightly different frequencies. A first photodetector (6) generates a first beat between the two radiations, to be used as reference. A second photodetector (9) generates a second beat between the two radiations, after they have been polarized in perpendicular planes and separated so that one of them is reflected onto the photodetector (9) by the sample under test (1,2). A measuring and computing system (11) determines the optical properties of said sample starting from the intensity of the second beat and from the relative phase between the two beats.

    4.
    发明专利
    未知

    公开(公告)号：IT8667871D0

    公开(公告)日：1986-11-24

    申请号：IT6787186

    申请日：1986-11-24

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GRECO GIORGIO

    IPC: G01K11/00 ,  G01J5/08 ,  G01J5/10 ,  G01K11/12 ,  G01K11/32 ,  G01K

    Abstract: The distributed temperature sensor employs an optical fibre (1) as sensing element located in an ambient or near a body of which the temperature is to be monitored or measured. A source (3) of light pulses sends into the fibre pulses of predetermined duration. The backscattered radiation is collected for each pulse and the frequency spectrum variations in the backscattered radiation with respect to the incident radiation are analyzed. A computing means obtains the temperature from said variations. The source (3) and the spectrum variation analyzing means (9) are part of an optical time domain reflectometer which allows the temperature information to be associated with the information on the position of the backscattering point along the fibre.

    6.
    发明专利
    未知

    公开(公告)号：IT1196798B

    公开(公告)日：1988-11-25

    申请号：IT6787186

    申请日：1986-11-24

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GRECO GIORGIO

    IPC: G01K11/00 ,  G01J5/08 ,  G01J5/10 ,  G01K11/12 ,  G01K11/32 ,  G01K

    Abstract: The distributed temperature sensor employs an optical fibre (1) as sensing element located in an ambient or near a body of which the temperature is to be monitored or measured. A source (3) of light pulses sends into the fibre pulses of predetermined duration. The backscattered radiation is collected for each pulse and the frequency spectrum variations in the backscattered radiation with respect to the incident radiation are analyzed. A computing means obtains the temperature from said variations. The source (3) and the spectrum variation analyzing means (9) are part of an optical time domain reflectometer which allows the temperature information to be associated with the information on the position of the backscattering point along the fibre.

    8.
    发明专利
    未知

    公开(公告)号：ITTO20000417A1

    公开(公告)日：2001-11-04

    申请号：ITTO20000417

    申请日：2000-05-04

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GRECO GIORGIO

    IPC: G01S1/58 ,  G01S1/70 ,  G01S1/82 ,  G01S5/00 ,  G01S5/02 ,  G01S5/16 ,  G01S5/18 ,  H04W64/00

    Abstract: First (1) and a second (2) sources of radiation located in two points of a given space are used. The sources (1, 2) create angular scanning of the space with first and second radiations respectively. The first and the second radiation have a respective characteristic which varies on the basis of the position reached in the scanning movement. Therefore in correspondence with every point in the space (S) the first and the second radiation have a respective pair of values for said characteristic which univocally identifies the position of said point in the context of said space (S). The position of the point in the context of said space (S) is therefore identified by said pair of values.

    Optical spectroscopy system
    9.
    发明专利
    Optical spectroscopy system 未知

    公开(公告)号：IT1241210B

    公开(公告)日：1993-12-29

    申请号：IT6731490

    申请日：1990-04-27

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GRECO GIORGIO

    IPC: G01J20060101 ,  G01J

    Abstract: Optical spectroscopy system in which a pulse of radiation being analysed is sent to a diffraction element 2 that has increased chromatic dispersion characteristics in time, and information is obtained concerning the spectrum of the radiation from the temporary widening of the pulse. Figure 2.

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