公开(公告)号：CA1205300A

公开(公告)日：1986-06-03

申请号：CA428972

申请日：1983-05-26

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  HOEK BERTIL ,  OVREN CHRISTER

IPC: G01R33/032 ,  G01B11/16 ,  G01D5/26 ,  G01D5/353 ,  G01D21/00 ,  G01K11/32 ,  G01R15/24 ,  G02B6/00 ,  G02B6/02 ,  G01N21/64

Abstract: A fiber optical sensor for detecting a change in a physical quantity which comprises a body of a solid, and substantially optically transparent bonding material, the bonding material determining the mechanical properties of said body. At least 1% by weight of atomically localized liminescent centers are included as a solution in the bonding material, these centers substantially determining the luminescent properties of said body.

公开(公告)号：DE3173291D1

公开(公告)日：1986-02-06

申请号：DE3173291

申请日：1981-06-15

Applicant: ASEA AB

Inventor： ADOLFSSON MORGAN ,  BROGARDH TORGNY ,  OVREN CHRISTER

IPC: G01M11/00 ,  G02B6/00 ,  G08C23/04 ,  H01L31/12 ,  H04B10/00 ,  H04B10/43 ,  H04B9/00

公开(公告)号：CA1199197A

公开(公告)日：1986-01-14

申请号：CA425040

申请日：1983-03-31

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  HOEK BERTIL ,  OVREN CHRISTER

IPC: G01B11/00 ,  G01D5/26 ,  G01D5/353 ,  G01J1/58 ,  G01L1/24 ,  G02B6/00 ,  G01N21/64

Abstract: A fiber optical luminescence measuring system for measuring a change in a physical quantity employs a transmitter/receiver unit and a sensor unit for the physical quantity optically linked by at least one optical fiber. The sensor unit is arranged to emit luminescent light with at least two different decay time constants, where the quotient between the intensities of emitted luminescent light having the different decay times corresponds to a measure of the quantity to be measured.

公开(公告)号：FR2491206B1

公开(公告)日：1985-12-06

申请号：FR8118115

申请日：1981-09-25

Applicant: ASEA AB

Inventor： BROGARD TORGNY ,  OVREN CHRISTER

IPC: G01J5/08 ,  G01J5/58 ,  G01K11/20 ,  G01L1/00 ,  G01L1/24 ,  G01L11/02 ,  H01L31/10 ,  H01L31/14 ,  G01D5/26 ,  G01K11/00

Abstract: A sensor element adaptable for measurement of a physical parameter formed of a crystalline material and emitting luminescent spectra upon excitation by light spectra and the influence of said physical parameter. A first layer emitting luminescent spectra is formed of a semiconductor material containing dopant providing shallow energy levels and recombination centers with a concentration between 1015 to 1018 cm-3, and sandwiched between second and third layers of semiconductor material having low absorption for light excitation of the first layer, and the respective lattice constants of the second and third layers being substantially coincidental with the lattice constant of the first layer. The sensor element is formed of GaAs for the substrate and AlGaAs for the semiconductor layers, with appropriate variation in the concentration Al, Ga, and As for the various layers. Generally, the energy band gap of the layers sandwiching the luminescent emitting layer are higher than that of the emitting layer. In a modified embodiment, GaAs is used as the luminescence emitting layer with covering semiconductor layers of AlGaAs, with appropriate variation in the concentration of Al, Ga and As. In a further modification an additional semiconductor layer of AlGaAs is sandwiched between the active semiconductor layer and a non-active semiconductor layer to reduce or eliminate a shift in the wavelength emission of the sensor element.

公开(公告)号：DE3377590D1

公开(公告)日：1988-09-08

申请号：DE3377590

申请日：1983-05-19

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  HOK BERTIL ,  OVREN CHRISTER

IPC: G01P15/093 ,  G01B11/00 ,  G01D5/26 ,  G01D5/30 ,  G01D5/353 ,  G02B6/00

Abstract: A fiber optical measuring device for measuring dynamic movements between a boundary surface of an optical fiber and a boundary surface of a movement-sensing body. The optical fiber is adapted to transmit optical energy to and from the boundary surfaces and at least one of the boundary surfaces includes a photo-luminescent material, the optical energy reflected from the boundary surface of the body being dependent on the relative position between the two boundary surfaces.

公开(公告)号：CA1221556A

公开(公告)日：1987-05-12

申请号：CA450211

申请日：1984-03-22

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  HOEK BERTIL ,  OVREN CHRISTER

IPC: G01D5/347 ,  G01D5/26 ,  G02B6/42 ,  G01N21/17

Abstract: A fiber-optic measuring device for measuring physical quantities, comprising a transducer unit and an electronic unit which are interconnected by means of at least one optic fiber. The measuring device is characterized in that the transducer unit comprises at least two photoluminescent elements, of which at least one is positioned in the ray path of light from the fiber, at least partly behind another element. The physical quantities to be measured are arranged to influence the light transmission between the photo-luminescent elements. The electronic unit includes at least two light sources having different emission spectra which are so chosen in relation to the absorption and transmission spectra of the photo-lumin-escent elements that one light source is arranged to excite substantially one of the photo-luminescent elements whereas the other light sources at least partly excite the other element or elements.

公开(公告)号：CA1218725A

公开(公告)日：1987-03-03

申请号：CA428971

申请日：1983-05-26

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  HOEK BERTIL ,  OVREN CHRISTER

IPC: G01P15/093 ,  G01B11/00 ,  G01D5/26 ,  G01D5/30 ,  G01D5/353

Abstract: A fiber optical measuring device for measuring dynamic movements between a boundary surface of an optical fiber and a boundary surface of a movement-sensing body. The optical fiber is adapted to transmit optical energy to and from the boundary surfaces and at least one of the boundary surfaces includes a photo-luminescent material, the optical energy reflected from the boundary surface of the body being dependent on the relative position between the two boundary surfaces.

公开(公告)号：CA1191901A

公开(公告)日：1985-08-13

申请号：CA411370

申请日：1982-09-14

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  OVREN CHRISTER

IPC: G01B11/00 ,  G01D5/26 ,  G01D5/353 ,  G01R15/24 ,  G01R33/032 ,  G08C23/04 ,  G01R19/00

Abstract: A fiber-optical measuring apparatus for measuring magnetic fields, current, position, and various mechanical quantities consists of a transducer connected to a measuring electronic unit via at least one optical fiber, and the transducer comprises a magneto-optical modulator with a domain-producing magnetic material. The transducer is provided with at least two optical filters, of which at least one filter is positioned in the ray path on one side of the magneto-optical modulator and at least one other filter is positioned in the ray path on the opposite side of the modulator.

公开(公告)号：CA1188397A

公开(公告)日：1985-06-04

申请号：CA386818

申请日：1981-09-28

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  OVREN CHRISTER

IPC: G01J5/08 ,  G01J5/58 ,  G01K11/20 ,  G01L1/00 ,  G01L1/24 ,  G01L11/02 ,  H01L31/10 ,  H01L31/14 ,  G01D5/26 ,  G02F1/015

Abstract: The invention relates to a sensor element formed of a crystalline material and which emits reproducible luminescence spectra in response to excitation light spectra. Such a sensor element comprises a first layer of semiconductor material emitting the reproducible luminescence spectra upon excitation by the excitation light spectra and doped with materials providing shallow energy levels and recombination centers. This first layer has a dopant concentration between 1015 to 1018/cm3. The sensor element further comprises at least second and third layers of semiconductor material surrounding the first layer and having low absorption for the excitation light and luminescent light of this first layer. The second and third semiconductor layers have respective lattice constants substantially coinciding with that of the first layer and each semiconductor layer has a same type of majority charge carriers.

公开(公告)号：GB2108760A

公开(公告)日：1983-05-18

申请号：GB8231208

申请日：1982-11-01

Applicant: ASEA AB

Inventor： BROGARDH TORGNY ,  OVREN CHRISTER

IPC: H01L31/10 ,  H01L31/0352 ,  H01L31/102 ,  H01L31/02

Abstract: In a semiconductor photodetector formed as a monolithic structure comprising regions (30, 31, 32) having mutually differing light absorption properties, an absorbing region (30) and a photoresponsive portion (31, 32) are separated by a diffusion barrier (30.5) in the form of a zone, layer or boundary surface constituting a bar to diffusion of minority charge carriers. The photoresponsive portion may comprise a P-N junction, Schottky diode or MOS structure, and the absorbing region (30) may be a filter region.