Matches 151 - 200 out of 323 < 1 2 3 4 5 6 7 >
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5212586 Optical circulator having a simplified construction  
An optical circulator which includes a first birefringent plate for receiving an incident beam of light from a first port, a Faraday rotator, a polarization transforming device, and a second...
5204771 Optical circulator  
The optical circulator according to the present invention comprises three birefringent crystal plates 22, 23, and 24; reciprocal and non-reciprocal rotators 25 of the first group inserted between...
5202789 Optical system for preserving a state of polarization of light beam  
First and second beam splitters are arranged on the optical path of a light beam emerging from a recording surface, and such that the phases and amplitudes of the respective polarized light...
H001155 Optical isolator with improved stabiity  
An optical isolator is disclosed which comprises a Faraday rotator disposed between a pair of polarization selective elements (e.g., linear polarizers, birefringent wedges, birefringent plates,...
5161049 Optical isolator and method for preparing same  
An optical isolator according to the present invention comprises a first polarizer, a Faraday rotator and a second polarizer which are adhered to one another in this order and held in a cylindrical...
5153688 Method and device for controlling interference of electron waves by light in which a transverse magnetic wave is applied  
An electron wave interference device controlled by a light is disclosed. The electron wave interference device includes a first channel to propagate an electron wave, a second channel arranged with...
5152597 Magneto-optic readout using a polarization-preserving optical fiber  
Apparatus for reading out information magneto-optically recorded in a magnetic layer comprises a single, polarization-preserving optical fiber for transmitting plane-polarized readout radiation...
5151955 Optical isolator  
An optical isolator having three or four birefringent crystals and two magneto-optic elements is disposed between two light waveguides to prevent reverse-directed light from returning to the light...
5146361 Apparatus comprising a magneto-optic isolator utilizing a garnet layer  
Apparatus according to the invention comprises a magneto-optic isolator. The isolator comprises a magneto-optic member that comprises a single crystal substrate and a single crystal garnet layer on...
5128797 Non-mechanical optical path switching and its application to dual beam spectroscopy including gas filter correlation radiometry  
A non-mechanical optical switch is provided for alternately switching a monochromatic or quasi-monochromatic light beam along two optical paths. A polarizer polarizes light into a single, e.g.,...
5111330 Optical isolators employing wavelength tuning  
An improvement in a method of rotating the plane of polarization of polarized light in a Faraday rotator, having an optical element which includes a ferromagnetic material, which comprises varying...
5099357 Optical sensor  
An optical sensor excellent in reliability and mass producibility and low in cost, by forming a magnetic optical crystal, polarizer and analyzer monolithically on the same substrate.
5071253 Optical light beam position control system  
An optical light beam position control system utilizes Kerr cells and Lummer-Gehrcke plates to produce sets of optical phased linear arrays for beam positioning and beam monitoring. The system...
5050968 Optical shutter using magneto-optical materials  
Optical shutters having a magneto-optical material confined in a holding plate which allows a light to pass through the magneto-optical material. When the intensity of a magnetic field applied to...
5043231 Gadolinium-lutetium-gallium garnet crystal, process for its production and substrate for magneto-optical device made thereof  
A gadolinium-lutetium-gallium garnet crystal having the formula: (Gd 1 -x Lu x ) 3 (Gd y Lu z Ga 1 -y-z) z Ga 3 O 12 (I) wherein x, y and z...
5038103 Optical fiber magnetometer  
An optical fiber magnetometer having omnidirectional capability is disclo herein for measuring a total magnetic field independent of its physical orientation or the direction of the field or...
5005952 Polarization controller  
A polarization controller comprises at least one stack of nematic liquid crystal cells arranged such that radiation incident on the stack will pass through each cell in the stack in sequence....
4984875 Optical component and magnetic-field sensor using superposed single crystal elements having different optical properties  
An optical unit or an optical sensor through which a light beam is propagated in a predetermined direction, having an optical component which includes at least one first single crystal element each...
4981341 Apparatus comprising a magneto-optic isolator utilizing a garnet layer  
Apparatus according to the invention comprises magneto-optic isolator means that utilize a novel temperature compensation scheme. The scheme involves the use of a composite magneto-optic member...
4966445 Optical device using magnetic thin films and electric field means  
A magnetic apparatus includes a magnetic semiconductor thin film, a power source for generating an electric field, an electrode for supplying charge from the power source to the magnetic thin film,...
4947107 Magneto-optic current sensor  
A sensor (10) for sensing the magnitude of current flowing in a conductor (12) based upon the Faraday effect is disclosed. The invention utilizes a magneto-optic material having one or more layers...
4933794 Head for reading a magneto-optical data carrier  
Data is recorded on a magneto-optical carrier (5), the magnetization of which in each recorded area is capable of reflecting a polarized laser beam (28,31,33) with rotation of the plane of...
4932760 Magneto-optic garnet  
This invention provides a magneto-optic garnet grown by liquid phase epitaxy on a nonmagnetic garnet substrate and having a composition of the following formula (1) Ho x Tb y Bi 3 -x-y Fe 5 O...
4899222 Magneto-optic and fiber-optic digital print head  
SIGHT-MOD (tm) is a commercially available array of magneto-optic light modulators each of which can cause light to be transmitted or blocked in response to an electrical signal. By combining a...
4896103 Current measuring magnetic field sensor having magnetooptic element with its easy axis of magnetization at right angles to the magnetic field generated by the current  
The magnetic field sensor is described for sensing the magnetic field, which comprises a light source part, a magnetic field detection part which contains a magnetooptic element consisting of a...
4876144 Single crystal thin film  
It is disclosed that a Heusler alloy thin film having a structure of a single crystal is prepared by forming a Heusler alloy thin film having a magneto-optical effect and an MgAgAs type crystalline...
4856878 Magnetic configuration for Faraday rotators  
A Faraday rotator having an optical element and a donut magnet of length 1.0L for generating a magnetic field along the optical axis of the optical element in order to rotate a plane of...
4843232 Optic switch and speed sensor  
An electro-optic speed sensor for sensing the speed of rotation of a rotating sending unit which includes an optical switch transducer for sensing disturbances in a magnetic field caused by the...
4840464 Optical isolator employing a germanium-arsenic-selenium composition  
A Faraday rotator for rotating a plane of polarization of polarized light, said Faraday rotator having an optical element comprising a rod which is comprised of an optically transmitting...
4823083 Integrated head for the measurement of magnetic fields and method of making this head  
A magnetic field measuring head comprises the following elements integrated into one and the same substrate: a light source, a light guide insensitive to the magnetic field, a layer of magnetic...
4818080 Monolithic faraday optical switch  
A monolithic optical switch has one or more Faraday effect polarization rotation layers of bismuth doped gadolinium deposited on opposite sides of an optically inactive substrate. A non-magnetic...
4818881 High-sensitivity infrared polarimeter  
A sensitive infrared polarimeter that measures the amount of degree of rotation of the plane of polarization of plane polarized radiation after the radiation has passed through a wafer of cadmium...
4813774 Skewed rhombus ring laser gyro  
A ring laser gyro uses a nonplanar equilateral (skew rhombus) ring path. In the preferred embodiment, the mirrors used to produce such path are mounted on a supporting cube having passages cut in...
4812767 Optical apparatus using anomalously strong magneto-birefringence of magnetic fluid  
An anomalously strong magneto-optical effect of a magnetic fluid thin film is obtainable when an external magnetic field is applied in the perpendicular direction to the propagation of the light...
4810065 High-frequency light polarization modulator device  
In a high-frequency light polarization modulating device including a source of polarized light (SL), a generator (BOBI) of a periodic magnetic field (H p ) having a pulsation (ω) and a...
4804256 Faraday rotators using a movable optical element  
A Faraday rotator comprising an optical element having an optical axis, a means for generating a magnetic field along the optical axis of the optical element in order to rotate a plane of...
4731581 Measurement head for a magnetic field gradient vector measuring apparatus, an apparatus comprising such a head and a measurement process  
A measurement head for a magnetic field gradient vector measuring apparatus, comprising essentially a laser diode emitting two light beams aligned along the same axis. Two magnetic field measuring...
4714325 Magneto-optical printing head and method of grey-scale image generation using such a printing head  
Magneto-optical printing head for generating a grey-scale image on a recording substrate has a magneto-optical light-switching mask with light-switching elements which are switched...
4712880 Polarization rotation compensator and optical isolator using the same  
A polarization rotation compensator and an optical isolator using the same are described. The optical isolator comprises a first birefringent wedge plate; a polarization rotation compensator...
4712065 Magnetic field sensors, in particular optical fiber magnetometers  
In a fiber optic interferometric magnetic sensor or magnetic gradient detector a magnetic bias field is applied to a magnetically sensitized portion of an optical fiber by means which are driven by...
4697145 Measuring system and measuring cell for making magnetic field measurements  
A process and apparatus for measuring a magnetic field based on the Faraday effect rotation of a light beam passing through a ferrimagnetic coating subject to a magnetic field to be measured is...
4683421 Drift compensation technique for a magneto-optic current sensor  
Drift compensation for the output signal of a magneto-optic current measuring system is achieved through the use of two light emitting sources, each at different frequencies, to generate two...
4671621 Optical systems with antireciprocal polarization rotators  
An optical system, e.g., an optical fiber communication system or an optical mass storage device, which includes a linearly birefringent polarization rotator useful in an optical isolator or...
4650290 Magneto-optical device  
A magneto-optical device for varying the state of polarization of a reflected or transmitted light beam having a wavelength which lies in particular in the range between 0.6 and 0.9 microns. The...
4650289 Optical circulator  
An optical circulator comprising a first optical path and a second optical path formed between a first polarizer prism and a second polarizer prism, Faraday rotators interposed in the first and...
4641926 Polarizing element  
A polarizing element comprising a transparent flat plate having at least two parallel surfaces, a polarizing separate layer provided on a portion of one parallel surface of the transparent flat...
4613811 Faraday current sensor with fiber optic compensated by temperature, degradation, and linearity  
A magneto-optical current sensor for measuring current flowing through a conductor, characterized by at least two components. One component is parallel to the direction of current flow and is...
4612500 Temperature stabilized Faraday rotator current sensor by thermal mechanical means  
Apparatus for measuring current in a conductor characterized by a magneto-optical current sensor employing the Faraday effect to measure current in a high voltage transmission line. Polarized light...
4609257 Faraday rotator assembly  
A Faraday rotator assembly includes a Faraday rotator of an optically transparent magnetic material; a device for applying a first magnetic field to the Faraday rotator, which field saturates the...
4574281 Image display device  
An image displaying device uses a thermal head to selectively create a magnetization pattern on an endless belt magnetic recording medium according to a signal applied thereto by heating the...
Matches 151 - 200 out of 323 < 1 2 3 4 5 6 7 >