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63 records (took 0.036 seconds)

    1.
    发明专利
    未知

    公开(公告)号：ITTO950189A1

    公开(公告)日：1996-09-14

    申请号：ITTO950189

    申请日：1995-03-14

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： COCITO GIUSEPPE

    IPC: B29D23/00 ,  B29K23/00 ,  G02B6/44 ,  H02G1/06 ,  H02G1/08 ,  H02G9/06

    Abstract: A duct for housing cables for underground telecommunications networks comprises one or more tubular elements (1) of a first plastic material, having helical ribs (2a, 2b; 3) on their inner surface. The ribs may also be formed as inserts into the material of the tubular element (1).

    2.
    发明专利
    未知

    公开(公告)号：DE672628T1

    公开(公告)日：1996-05-02

    申请号：DE95103595

    申请日：1995-03-13

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BRAGLIA MARCO ,  COCITO GIUSEPPE

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03C13/04

    Abstract: Fluoride glass optical fibres are fabricated by minimizing the number of high-temperature operations. A tube comprising an external layer of a first fluoride glass of composition suitable to form the cladding of the fibre and an internal layer of a second fluoride glass of composition suitable to form the core of the fibre is prepared from a melt by a conventional rotational casting technique. Then, the internal layer is thinned by means of chemical etching at ambient temperature until the attainment of a ratio between the volumes of the two layers that corresponds to the ratio between the core and cladding diameters required for a single mode fibre, and the resulting tube is drawn.

    3.
    发明专利
    未知

    公开(公告)号：IT1247764B

    公开(公告)日：1994-12-30

    申请号：IT6781490

    申请日：1990-10-22

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： COCITO GIUSEPPE ,  GREGO GIORGIO

    IPC: G01J9/04 ,  G01N21/41 ,  G01N

    Abstract: The system uses a monochromatic radiation source (1) and an acousto-optic modulator (2), which is driven by a periodically variable frequency. The modulator emits a first beam having the same wavelength as the source and a second beam, whose wavelength and emission direction vary with the modulating frequency. After the second beam has been collimated, radiations of both beams are sent towards the component under test and an electrical signal with varying frequency is generated representative of the beat between such radiations at the output from the component. A spectral analysis of the beat signal is carried out, and the refractive index value is derived from the position taken by the various frequencies of the beat signal on a detection plane.

    6.
    发明专利
    未知

    公开(公告)号：IT1195120B

    公开(公告)日：1988-10-12

    申请号：IT6762886

    申请日：1986-08-04

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BIELLI PAOLO ,  BRESCIANI DANIELE ,  CONTU SALVATORE ,  COCITO GIUSEPPE

    IPC: B25J19/02 ,  H01Q15/00 ,  H01Q15/14 ,  H01Q

    Abstract: A method of manufacturing dichroic antenna structures, which makes use of projector mounted on the mobile arm of a computer-controlled machine to project the shape of selective antenna elements on the surface of an insulating layer, clad with a metallic layer covered in turn with a photographic emulsion. Development and chemical etching of the exceeding conductive parts are then carried out.

    8.
    发明专利
    未知

    公开(公告)号：IT1191998B

    公开(公告)日：1988-03-31

    申请号：IT6729086

    申请日：1986-04-10

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： COCITO GIUSEPPE

    IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  G02F

    Abstract: The process employs solid-state halides heated at high temperature, under pressure conditions necessary to their vaporization, and obtains their condensation to solid state on the internal surface of a glass tube, which, after collapsing, forms the preform.

    10.
    发明专利
    未知

    公开(公告)号：IT1072041B

    公开(公告)日：1985-04-10

    申请号：IT6980676

    申请日：1976-11-25

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： COCITO GIUSEPPE

    IPC: G02B6/24 ,  G02B6/44 ,  H01B11/00 ,  H01B

    Abstract: One or more optical fibers, forming part of a cable for the transmission of luminous signals, are divided into sheathed sections spliced together inside a junction box having opposite walls provided with a pair of nipples in which the incoming and outgoing cable portions are resiliently clamped. Between these nipples the two sections of each fiber, partly stripped of their sheaths, are bent into a loop along which they are joined together by a sleeve. Adjacent fiber loops of the same cable can be separated within the box by interposed sheets. The loops not only relieve stresses on the bared fiber ends but also facilitate the equalization of ray paths in a multifiber optical cable.

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