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7 records (took 0.022 seconds)

    1.
    发明专利
    未知

    公开(公告)号：IT8423214D0

    公开(公告)日：1984-10-18

    申请号：IT2321484

    申请日：1984-10-18

    Applicant: ESSILOR INT

    Inventor： MASSARD CHRISTIAN ,  PIERRE ALAIN ,  ROUMEGOUX JEAN LOUIS

    IPC: B24B9/14 ,  G02C13/00 ,  B24B

    Abstract: The peripheral edge of an ophthalmic lens is maintained in contact with a bevelling or grooving wheel while being rotated about an axis of the lens parallel to the axis of the bevelling wheel whereby a bevel or groove is formed in said peripheral edge. The ophthalmic lens is capable of relative axial displacement relative to said bevelling wheel. By way of a force or displacement sensor, the relative axial position of the ophthalmic lens with respect to the bevelling wheel can be made subject to the axial component of reaction forces generated between the lens and the bevelling wheel in their mutual contact zone.

    Colour blindness determn. by LED shade equivalence - using reference shade and shade synthesised by addition of primaries combined by signal mark-space ratio adjustment
    2.
    发明专利
    Colour blindness determn. by LED shade equivalence - using reference shade and shade synthesised by addition of primaries combined by signal mark-space ratio adjustment 未知

    公开(公告)号：FR2520604A1

    公开(公告)日：1983-08-05

    申请号：FR8201448

    申请日：1982-01-29

    Applicant: ESSILOR INT

    Inventor： MASSART CHRISTIAN ,  ROUMEGOUX JEAN LOUIS

    IPC: A61B3/06

    Abstract: The device determines the subjective equivalence of shades of two illuminated areas (2,3) of equal luminance. The shade of the first area (3) results from the addition in related amounts of complementary fluxes of two monochromatic primaries, defining the limits of an explored spectrum. The shade of the second area provides a monochromatic reference situated in a mid-zone of this explored spectrum. The areas are illuminated by LED's, each area being constituted by the emitting surface of one diode. The first area diode is adapted to emit one or the other primary respectively in response to two complementary rectangular pulse trains to form the ratio of fluxes resulting from regulation (5b) of the cyclic ratio of the pulse train. The emitting areas of the diodes are viewed through an eye-piece (1). The complementary pulse trains are produced by a generator comprising a clock (7), a cyclic counter (6) and a monostable (5) having two complementary outputs (5c,5d).

    7.
    发明专利
    未知

    公开(公告)号：IT1178579B

    公开(公告)日：1987-09-09

    申请号：IT2321484

    申请日：1984-10-18

    Applicant: ESSILOR INT

    Inventor： MASSARD CHRISTIAN ,  ALAIN PIERRE ,  ROUMEGOUX JEAN LOUIS

    IPC: B24B9/14 ,  G02C13/00 ,  B24B

    Abstract: The peripheral edge of an ophthalmic lens is maintained in contact with a bevelling or grooving wheel while being rotated about an axis of the lens parallel to the axis of the bevelling wheel whereby a bevel or groove is formed in said peripheral edge. The ophthalmic lens is capable of relative axial displacement relative to said bevelling wheel. By way of a force or displacement sensor, the relative axial position of the ophthalmic lens with respect to the bevelling wheel can be made subject to the axial component of reaction forces generated between the lens and the bevelling wheel in their mutual contact zone.

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