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7391013 |
Scanning beam device with detector assembly
The present invention provides scanning beam devices that have one or more detectors positioned within a housing of the device. The detector(s) may be disposed anywhere within the housing to...
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7375889 |
Apparatus and method for controlling polarization in an optical communications medium
A method for resetting a polarization controller includes determining that the phase magnitude is associated with a first range of phase angles and generating a first control signal having a first...
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7373059 |
Compact, single chip-based, entangled polarization-state photon sources and methods for generating photons in entangled polarization states
Various embodiments of the present invention are directed to compact systems for generating polarization-entangled photons. In one embodiment of the present invention, a polarization...
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7369234 |
Method of performing optical measurement on a sample
The invention relates to a method of performing an optical measurement on a sample, such as an ellipticity measurement. The sample is irradiated with a polarized irradiation beam and a return beam...
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7361884 |
Polarization independent optical isolator and optical transmitting/receiving apparatus
A polarization independent optical isolator includes: a first birefringent plate that divides the receiver light from the optical transmission path into normal light and abnormal light to output...
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7358470 |
Optical pickup
An optical pickup with a reflective coating device is provided, including a laser diode (LD), an optical element, and a photo detector integrated circuit (PDIC). The LD emits 1-3 lights with...
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7335874 |
Method and apparatus for generating a circularly polarized illumination beam
A method and apparatus for illuminating a subject with deep UV light and detecting 2-dimensional image information, e.g., a transmission image, fluorescence image, reflected light image, etc. The...
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7335873 |
Light condensing method and light condenser as well as near-field optical microscope and storage device formed by applying the same
A light-condensing method of irradiating light whose electric field vectors show two or more than two different directions onto a member having apertures arranged at least at two positions and...
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7330259 |
Optical measurements of patterned articles
A method and system are presented for use in measuring/inspecting a patterned article. Optical measurements are applied to a measurement site on the article by illuminating the measurement site...
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7312924 |
Polarizing multiplexer and methods for intra-oral scanning
A polarizing multiplexer includes a first arm with a first beam splitter to receive a first unpolarized light from an object and a first retarder coupled to the first beam splitter to generate a...
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7304294 |
Reflective encoder with reduced background noise
An encoder having a code scale and an emitter detector module is disclosed. The code scale includes alternating reflective and opaque stripes. The emitter-detector module includes a light source...
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7301649 |
System for scatterometric measurements and applications
Instead of constructing a full multi-dimensional look-up-table as a model to find the critical dimension or other parameters in scatterometry, regression or other optimized estimation methods are...
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7301163 |
Lateral shift measurement using an optical technique
Alignment of layers during manufacture of a multi-layer sample is controlled by applying optical measurements to a measurement site in the sample. The measurement site includes two diffractive...
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7301138 |
Method and apparatus for dual polarization imaging
An imaging system and method for dual polarization imaging is provided. In one implementation, an imaging system includes a field stop located at a first image plane for limiting an incident light...
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7291829 |
Light intensity detector
A polarization separating element such as a beam splitter receives a first light of a first polarization plane. The polarization separating element derives out of the first light a second light of...
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7285767 |
Methods and apparatus for inspecting an object
A method for inspecting an object using a structured light measurement system that includes a light source and an imaging sensor. The method includes emitting light from the light source,...
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7282695 |
Active search sensor and a method of detection using non-specular reflections
It has been found that target optics produce non-specular, augmented optical returns when interrogated by a laser pulse. This non-specular radiation is detected by an active laser search system...
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7268875 |
Method and apparatus for optically measuring absolute displacement
A method and apparatus using two sets of polarized light detection systems are disclosed for optically measuring absolute displacement. In the first detection system a step motor is controlled to...
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7268342 |
Determination of optical properties of a device under test in both directions in transmission and in reflection
A method and a measurement setup for determination of optical properties of a device under test in both directions in transmission and in reflection, includes a coding device distinguishably coding...
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7262380 |
Determination of characteristics of material
A system for automatically inspecting matter for varying composition comprises one or more detection stations through which one or more streams of matter are advanced and particular materials...
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7259844 |
High throughput darkfield/brightfield wafer inspection system using advanced optical techniques
The broadband brightfield/darkfield wafer inspection system provided receives broadband brightfield illumination information via a defect detector, which signals for initiation of darkfield...
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7253901 |
Laser-based cleaning device for film analysis tool
A system for analyzing a thin film uses an energy beam, such as a laser beam, to remove a portion of a contaminant layer formed on the thin film surface. This cleaning operation removes only enough...
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7220978 |
System and method for detecting defects in semiconductor wafers
A system and method for detecting defects in semiconductor wafers in a rapid non-destructive manner. Defects in semiconductor wafers can include micropipes and screw dislocations, stress...
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7220954 |
Quantum state transfer between matter and light
Disclosed are apparatus and methods that provide for a coherent quantum state transfer of information from a two-level atomic system (matter) to a single photon (light). Entanglement between a...
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7211812 |
Entangled photon pair generating apparatus
An entangled photon pair generating apparatus has a first definite polarization photon pair generating apparatus for generating a first definite polarization photon pair beam according to an...
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7209232 |
Device for ellipsometric two-dimensional display of a sample, display method and ellipsometric measurement method with spatial resolution
A device for ellipsometric two-dimensional display of a sample placed in an incident medium, observed between an analyser and a polarizer intersected by convergent light reflection, wherein the...
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7202951 |
Laser-based cleaning device for film analysis tool
A system for analyzing a thin film uses an energy beam, such as a laser beam, to remove a portion of a contaminant layer formed on the thin film surface. This cleaning operation removes only enough...
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7189961 |
Scanning beam device with detector assembly
The present invention provides scanning beam devices that have one or more detectors positioned within a housing of the device. The detector(s) may be disposed anywhere within the housing to...
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7186968 |
Polarization sensitive solid state image sensor including integrated photodetector and polarizing assembly and associated methods
A polarization sensitive solid state image sensor includes an integrated photodetector and polarizing assembly. The polarizing assembly is formed directly on an upper dielectric surface of the...
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7180051 |
Polarization state detecting system, light source, and exposure apparatus
A polarization state detecting system includes a first dividing device for dividing incident light into two light beams having the same polarization state as that of the incident light, a detector...
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7164145 |
Measuring fiber orientation by detecting dispersion of polarized light
An image-based technique that measures the orientation of fibers in a moving web of nonwoven material. At least four light spots on one side of the web are illuminated essentially simultaneously...
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7157687 |
Optical devices with folded optical path designs
Optical devices with folded optical paths to reduce size of optical devices and optical elements in the optical devices. The folded optical paths operate by manipulating optical polarization of...
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7151632 |
Apparatus for production of an inhomogeneously polarized optical beam for use in illumination and a method thereof
An apparatus for producing an inhomogeneously polarized optical beam from a homogeneously polarized input optical beam includes a first phase shifter, a second phase shifter, and one or more...
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7148468 |
Mirror angle measurement and servo control apparatus for holographic digital data storage system
A mirror angle measurement and a servo control apparatus for a Holographic Digital Data Storage (HDDS) system is disclosed. The mirror angle measurement apparatus includes a first mirror having a...
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7126106 |
Quantum computer and quantum computation method
Quantum computer includes optical systems arranged in series each of the plurality of optical systems includes first half-wave plate, first polarizing beam splitter, first switching mirror, first...
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7122817 |
Lateral shift measurement using an optical technique
Alignment of layers during manufacture of a multi-layer sample is controlled by applying optical measurements to a measurement site in the sample. The measurement site includes two diffractive...
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7115858 |
Apparatus and method for the measurement of diffracting structures
A normal incidence reflectometer includes a rotatable analyzer/polarizer, which permits measurement of a diffracting structure. Relative rotation of the analyzer/polarizer with respect to the...
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7110114 |
System and method for enhancing confocal reflectance images of tissue specimens
A confocal scanning microscope system ( 10 ) using cross polarization effects and an enhancement agent (acetic acid) to enhance confocal microscope reflectance images of the nuclei of BCCs (basal...
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7102120 |
Optical module with built-in wavelength locker
An optical module comprises a splitting element that splits light outputted from a light source; a first monitoring means that detects the intensity of light split by the splitting element; a...
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7098442 |
Thin micropolarizing filter, and a method for making it
A polarizing filter includes a portion with a filtering layer having a plurality of openings extending therethrough, where this portion has a maximum physical thickness in a radiation travel...
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7084976 |
Concentration measuring instrument
To measure the concentration of an optically active substance in a solution without contacting the solution, the concentration measuring apparatus of the present invention includes: a light source...
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7081613 |
Retroreflective photoelectric sensor
A retroreflective photoelectric sensor has a light-emitting optical system having a light-emitting element and a first polarizer and serving to transmit light from the light-emitting element...
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7078674 |
Optical pickup device emitting linear polarized light with a 45 degree phase difference
The present invention relates to an optical device which includes a first laser diode, a beam splitter, a first objective lens, a photo-detector, a second laser diode, a wedged plate beam splitter,...
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7075055 |
Measuring device
Provided is a measuring device which has a focusing unit for focusing light flux from a light source and irradiating it to a magnetic substance to be measured, a half-turn asymmetric element acting...
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7067795 |
Methods and systems for dynamic control of polarization of an optical signal
Techniques and systems for dynamically controlling polarization of an optical signal by using various feedback controls, and by combining both feed-forward and feedback controls. Various dynamic...
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7057792 |
Optical sensor unit for measuring current and voltage of high frequency
An optical sensor unit, free from electrical noise, includes a sensor case which has both lateral sides having high frequency connectors mounted thereon, and a metallic plate mounted inside the...
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7045766 |
Retroreflective photoelectric sensor
A retroreflective photoelectric sensor may be of a biaxial type or of a coaxial type. A sensor of the biaxial type includes a light-emitting optical system having a light-emitting element, a first...
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7041959 |
System and method for monitoring the performance of dense wavelength division multiplexing optical communications systems
A system and method for monitoring all the characteristic parameters of a DWDM communication system is implemented with two variants. Firstly, this is achieved by means of a specific grating...
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7035009 |
Apparatus and method for controlling polarization in an optical communications medium
An exemplary polarization controller includes a first optical element having a first optical axis and configured to receive light having a first phase, a second optical element having a second...
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7015456 |
Exposure apparatus that acquires information regarding a polarization state of light from a light source
A polarization state detecting system includes a first dividing device for dividing incident light into two light beams having the same polarization state as the incident light, a detector for...
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