1
Torgny Brogardh, Leif Stensland: Fiber optical measurement apparatus. ASEA Aktiebolag, Watson Cole Grindle & Watson, July 28, 1981: US04281245 (57 worldwide citation)

The invention relates to an optical measuring device for measuring physical magnitudes such as position, speed, acceleration, force, pressure, elongation, temperature, etc., comprising at least one optical fiber for conducting light between an electronic unit and a transducer forming an optical modu ...


2
Jan Bergstrom, Hans Bertilson, Torgny Brogardh, Anders Persson: Optical measuring device using optical fibers. ASEA Aktiebolag, Watson Cole Grindle & Watson, February 3, 1981: US04249076 (44 worldwide citation)

In an optical measuring device for measuring physical magnitudes a sensor is actuated by the physical magnitude to be measured. An optical signal generator and processor provides light signals to the sensor and processes optical output signals transmitted from the sensor. Optical fibers conduct ligh ...


3
Torgny Brogardh, Lars Sander: Fiber optical temperature measurement devices. Asea Aktiebolag, Watson Cole Grindle & Watson, February 2, 1982: US04313344 (39 worldwide citation)

The invention relates to a fiber optical temperature measuring device of the pyrometer type, comprising a transducer section and an electronic section, which are mutually interconnected by at least one optical fiber. The electronic section includes at least one light source and the light therefrom i ...


4
Morgan Adolfsson, Torgny Brogardh: Fiber optical devices for measuring physical phenomenon. ASEA Aktiebolag, Watson Cole Grindle & Watson, August 24, 1982: US04345482 (39 worldwide citation)

The invention relates to a fiber optical device for measuring physical magnitudes such as force, elongation, pressure, acceleration, temperature, etc., comprising a transducer unit and an electronic unit, in which the quantity to be measured is supplied to the transducer unit to affect the resonance ...


5
Torgny Brogardh, Christer Ovren: Device for simultaneous creation and detection of markings. ASEA Aktiebolag, Watson Cole Grindle & Watson, October 2, 1984: US04475240 (38 worldwide citation)

Device for simultaneous generation and detection of markings (e.g. handwriting) comprising at least one marking member and at least one optical sensor, which is arranged to sense at least one optical property of the surface on which the marking is being made, the marking member being arranged to cha ...


6
Torgny Brogardh: Apparatus for measuring pressure by absorption spectrum change. ASEA Aktiebolag, Watson Cole Grindle & Watson, May 26, 1981: US04270050 (36 worldwide citation)

A fiber optical measuring device for measuring physical magnitudes comprises a transducer having a body constituting an optical modulator. The optical properties of the modulator are dependent on the mechanical forces acting on the modulator. The optical property utilized is the pressure dependency ...


7
Torgny Brogardh, Christer Ovren: Fiber-optical measuring apparatus. ASEA Aktiebolag, Watson Cole Grindle & Watson, July 16, 1985: US04529875 (33 worldwide citation)

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 m ...


8
Torgny Brogardh, Olof Engstrom: Apparatus for measuring electrical or magnetic fields by absorption spectrum change. ASEA Aktiebolag, Watson Cole Grindle & Watson, October 26, 1982: US04356448 (29 worldwide citation)

A fiber optical measuring device for measuring a magnetic or electric field comprises an optical modulator influenced by the field. The optical properties of the modulator are dependent on the magnetic or electric field acting on the modulator. The optical property which is made use of is the field ...


9
Torgny Brogardh, Bertil Hok, Christer Ovren: Optical sensor having atomically localized luminescence centers. ASEA Aktiebolag, Watson Cole Grindle & Watson, February 11, 1986: US04569570 (29 worldwide citation)

An optical sensor for detecting changes in physical quantities such as temperature, position, force, level, pressure, flow, acceleration, magnetic or electrical field strength or mechanical deformation, includes a luminescent material built up of atomically localized luminescence centers, included a ...


10
Morgan Adolfsson, Torgny Brogardh, Sture Goransson, Christer Ovren: Fiber optical measuring device, employing a sensor material with a non-linear intensity response characteristic for measuring physical quantities. ASEA Aktiebolag, Watson Cole Grindle & Watson, February 5, 1985: US04498004 (28 worldwide citation)

The invention relates to a measuring device for measuring physical and/or chemical quantities, comprising a measuring transducer and an evaluating electronic unit interconnected by at least one light-conducting fiber, said evaluating electronic unit comprising one or more light sources for transmitt ...