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7619207 |
Lithographic apparatus and device manufacturing method
The present invention relates to a method for calibrating a grating of an encoder measurement system between two adjacent calibrated locations, the method includes moving one of a sensor object...
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7538312 |
Method for determining the position of a first moving component relatively to a second component and device for applying said method
A method for determining the position of one of two components in relative motion with respect to each other, using optical means, comprises:
directing at least one light beam emitted by a...
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7476843 |
Method for determining the position of a first moving component relative to a second component and device for applying said method
A method for determining the position of one of two components in relative motion with respect to each other, using optical means, comprises:
directing at least one light beam emitted by a...
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7263870 |
Gauge calibration method
The instrument panel gauge assembly includes an applique having gauge graphics printed thereon and a needle pointer for a gauge assembly positioned adjacent thereto. A transparent chaplet is formed...
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7232989 |
Transverse optical accelerator and generalized optical vortices
A method and system for generating modulated optical vortices. Optical vortices can be used for a variety of applications, such as applying controlled torque or controlled force patterns to objects...
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7109473 |
Transverse optical accelerator and generalized optical vortices
A method and system for generating modulated optical vortices. Optical vortices can be used for a variety of applications, such as applying controlled torque or controlled force patterns to objects...
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6867411 |
Optically rebalanced accelerometer
An optical accelerometer for detecting an acceleration of a proof mass includes a source of optical radiation for generating a pair of beams of output radiation. The pair of beams of optical...
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6741184 |
Pointer position detection using light emitting diodes
An apparatus and method sensing the absolute position of a gauge. A pointer having a predefined rotation with a circular travel pattern. At least one light emitting diode that generates an optical...
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6495820 |
Sensor apparatus and method for sensing angular rotation of an object using light reflected off a rotor and bifurcation compensation
An apparatus ( 100 ) for sensing angular rotation includes a rotor ( 102 ) that is rotatable about an axis ( 104 ). The rotor ( 102 ) has an outer periphery (e.g., cylindrical outer sidewall 106 )...
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6157311 |
Portable electro-magnetic radiation sensor warning device
A portable, compact, freestanding sensor housing is configured to be stably and removably affixed relative to a metering device having a movable indicator element. The housing includes a...
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6087959 |
Optically coupled gas meter
A gas meter using optical communication. The meter includes a shaft that is rotated by a flow of gas, a first sensor for sensing a first rotational angle of the shaft, a second sensor for sensing a...
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5698847 |
Optical-modulation-type sensor and process instrumentation apparatus employing the same
An optical-modulation-type sensor comprises an input condenser lens for collecting light from a light source, a polarizer for linearly polarizing the light from the input condenser lens, a...
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5532479 |
Temperature, pressure, vibration or humidity sensor based on reflected light from a bimetallic, plastic or dehumidifying material
A multi-function sensor using a semiconductor laser capable of sensing a value of a measurement object such as temperature, humidity, pressure or vibration on the basis of a variation in the...
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5528936 |
Optoelectronic spatial acceleration sensor
An acceleration sensor device capable of a variant response to acceleration(s) as they may occur in all directions in any axis. The sensor may further discriminate, filter, or target a specific...
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5428446 |
Measurement instrument with interferometer and method
A ball bar gage for obtaining the accuracy of numerical control machines and the like including telescoping means integrated with an interferometer and the method of measuring the distances between...
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5426297 |
Multiplexed Bragg grating sensors
A measurement system for fiber sensors includes a broadband light source 11 providing continuous light which is launched into a fiber 20 having a plurality (or string) of Bragg grating sensors 24,...
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5311014 |
Optical transducer for measuring pressure
Differential displacement is optically detected by independent movement of either a collimated light source or a dual element photosensitive detector. Relative movement between the detector or...
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5303921 |
Jammed shuffle detector
The present invention provides a floating jammed shuffle detector for use in a card shuffling machine. The detector has a body with a card contacting portion and a sensor interactive portion. A...
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4927226 |
Multiplexer for high power CW lasers
Apparatus for multiplexing a coherent high power CW laser beam has a mirror mounted on a galvanometer to interrupt the laser beam and another mirror mounted on another galvanometer to deflect the...
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4777360 |
Umbra/penumbra detector
A device which monitors the characteristics of an image cast upon a radiation sensitive substrate. This includes a shadow casting object or mask and at least one source of radiation disposed above...
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4697077 |
Vane encoder assembly for adjusting an optical encoder in a data storage device
Accurate gap adjustments in an optical encoder used in a magnetic disk drive are achieved within a vane encoder assembly which incorporates a four-bar linkage. The optical encoder includes a fixed...
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4636637 |
Method and apparatus for detecting motion through a transparent enclosure, with spurious information detecting and compensating means
An electro-optical encoder is disclosed of the type used for reading utility meters. The encoder includes at least one light source for directing light onto the edge of the rotating disk of the...
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4634859 |
Optical encoder with two photosensors
An optical encoder for indicating revolutions of a shaft includes two phototransistors positioned to be energized concurrently by light from a light source, a barrier rotated by the shaft to shade...
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4631539 |
Digital pointer position detector
A mechanical dial indicating gauge or meter that, without mechanical loading, optoelectronically detects and encodes the pointer position as a digital signal by use of a technique of distributed...
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4626682 |
Angle measuring device
An improved angle measuring device in which rotational irregularity in the form of two cycles or more per rotational cycle of the motor driving device is compensated for completely. A period of...
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4609817 |
Optical shaft position sensor
An optical sensor for determining the position of a rotating shaft, comprised of a first and second light deflecting means, a light sensing means, and a means for providing a source of light. The...
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4571995 |
Digital readout indicator of oxygen usage, pressure and flow
A digital readout and display adapted for use with a tank of oxygen under pressure provides pressure regulation, discerning of the pressure in the tank and consumption of the oxygen. A small...
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4550316 |
Stylus mouse
A mouse comprises a housing for sliding movement on a nonspecific work surface, and a stylus depending from the housing and contacting the work surface. The stylus bends and vibrates during...
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4417238 |
Alarm modification for meteorological instrument
An alarm modification kit for adding an electrical alarm signal feature to a mechanical recording type meterorological instrument. The kit includes a counterbalanced shutter arm adapted to be...
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4331867 |
Photoconductive instrument
The invention is directed to an instrument control apparatus capable of regulating the flow of electric current by detecting relative movement between an indicator and a control zone. A light...
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4300548 |
System for detecting position of gauge pointer
A system is disclosed for detecting the position of the pointer of a gauge. The system includes a stationary light source which is positioned adjacent the pointer. A lens receives the light from...
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4286151 |
Device for guiding the displacement of a vehicle and in particular an agricultural machine
The device comprises in a preferred embodiment, on one hand, an orienting system comprising a compass provided with two reflecting faces angularly offset 180°, an orientable optical system for...
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4275393 |
Method and apparatus for sensing pressure
A pressure sensing device has a light source, and an optical sensor for externally sensing a predetermined change in the pressure within a sealed system which has a conventional gauge. Illumination...
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4255655 |
Temperature sensing switch with an optical sensor
A temperature sensing switch is disclosed which has a needle moving in response to the temperature within a translucent case. On the outside of this case are mounted one or a plurality of movable...
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4107661 |
Electrooptic meter pointer position detector
A device is provided for a meter having an indicator, e.g. a pointer, and which detects the presence or absence of the meter pointer at one or more set points or between two set points. The device...
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4087684 |
Fiber optics proportional control system
A fiber optic feedback control system for controlling a motor having an output for driving a condition controlling device, is disclosed which comprises a fiber optic having a first flared end, a...
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3938890 |
Torque transducer utilizing differential optical sensing
Torque stress on a stationary or rotating shaft is measured in a contactless fashion utilizing differential optical sensing means. A pair of light-controlling discs are attached to opposite ends of...
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3901605 |
Apparatus for measuring angular position
The angular position or the angle of deflection of a gauge pointer is measured by a cathode ray tube having a light spot moving at a fixed speed in a circular pattern, and a light detector with the...
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3862416 |
PRESSURE INDICATOR AND SWITCH
A pressure indicator and light sensitive electric switch device comprising a controlling magnetic helix device carrying a pressure indicating arm, the position of which is controlled by a magnet...
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3857032 |
OPTICAL COURSE DATUM HEADING SELECTION TRANSDUCER
An optical transducer in an avionics system which includes a compass card for indicating aircraft heading has a disc with a cam surface thereon that is rotated by a shaft connected compass card....
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3590261 |
OPTOELECTRIC TRANSDUCERS WHICH UTILIZE A SINGLE LIGHT SOURCE TO PRODUCE BOTH ANALOG AND DIGITAL OUTPUTS
A transducer which measures the change of a measured physical variable such as temperature or pressure, etc. by means of a mechanically actuable element such as a bourdon tube. The mechanically...
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3513708 |
ALTITUDE INDICATING AND REPORTING SYSTEM
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3512006 |
AUTOMATIC RECORDERS FOR PRECISION GONIOMETERS OR LENGTH MEASURING INSTRUMENTS EMPLOYING COARSE AND FINE SCALES
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3502894 |
ANGLE MEASURING PHOTOELECTRIC TRANSDUCER WITH TWO PHOTOCELLS AND ELECTROLUMINESCENT SOURCE OF LIGHT
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3490295 |
SPEED SENSING DEVICE HAVING POSITIONALLY ADJUSTABLE SWITCH ELEMENTS
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3446979 |
FLOW INDICATOR FOR DIVIDED SOLID MATERIAL PROVIDED WITH INDICIA RESPONSIVE PHOTOELECTRIC MEANS
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3446981 |
PHOTOELECTRIC SYSTEM FOR DETECTING METER POINTER POSITION
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3441740 |
INDICATING METER RELAY WITH PHOTOELECTRIC MEANS FOR SENSING THE OVERLAPPING OF INDICATING POINTER OVER SET POINTER
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3431422 |
WEIGHING SYSTEM INCLUDING OPTICALLY ACTUATED ADJUSTABLE SET POINT CONTROL CIRCUIT HAVING SWITCH FOR SELECTING RESET MODE
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3425280 |
ELECTRONIC INSTRUMENT FOR MEASURING FLUID FLOW PAST FLUID PRESSURE SENSING MEANS
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