Matches 1 - 47 out of 47


Match Document Document Title
US20140240715 Natural light interferometer  
Disclosed is a Natural Light Interferometer. The interferometer measures the amplitude and phase distribution of a coherent or incoherent electromagnetic signal, including natural light. In...
US20080165365 Optical-phase monitoring appratus and optical-phase monitoring method  
An optical-phase monitoring apparatus includes an optical switch, an optical-phase detecting circuit, and a display circuit. The optical switch multiplexes signal light and a control optical...
US20090097093 DOWNHOLE USES OF PRESSURE-TUNED SEMICONDUCTOR LIGHT SOURCES  
An instrument for use in a borehole, the instrument including a pressure tuned light source disposed in a housing adapted for insertion into the borehole.
US20110096335 HANDHELD INTERFEROMETER BASED WAVELENGTH METER  
A handheld wavelength meter that includes a housing that encloses a non-stable reference signal source, an interferometer with rotating retroreflectors, optical-electrical converters, a frequency...
US20120057170 DEMODULATION METHOD  
A demodulation method for a pseudo-heterodyne signal, wherein the pseudo-heterodyne signal has a phase-modulated carrier signal and the pseudo-heterodyne signal is digitally sampled. A...
US20090251706 VIBROMETER AND METHOD FOR OPTICALLY MEASURING AN OBJECT  
A vibrometer and a method for optically measuring oscillations at an object, including a radiation source for creating a source beam, a beam splitter to split the source beam into a measuring beam...
US20140268109 MULTIFUNCTION SOLID-STATE INSPECTION SYSTEM  
An inspection system includes optical components for operating the inspection system in an interference fringe imaging mode and a microscope imaging mode. The inspection system further includes at...
US20150159990 VARIABLE-FREQUENCY OPTICAL COMBS, HETERODYNE SENSOR, AND PROCESS FOR PERFORMING SPECTROSCOPY  
A comb source includes a continuous wave frequency source to provide a continuous wave radiation; a first modulator in optical communication with the continuous wave frequency source; a second...
US20090153839 PARTIAL COHERENCE INTERFEROMETER WITH MEASUREMENT AMBIGUITY RESOLUTION  
A partial coherence interferometer incorporates a focusing system for resolving measurement ambiguities. A focus-sensing beam is directed through a common objective with the measurement beam of...
US20080192260 Cascade type interferometric nonlinear optical imaging apparatus  
The present invention relates to a cascade type interferometric nonlinear optical imaging apparatus, and the imaging apparatus comprises a light source for generating Stokes beam having a desired...
US20090027686 Optical heterodyne fourier transform interferometer  
An interferometer and method for interferometric analysis are provided. The methodology includes generating first and second light beams from a light source, interacting the first light beam with...
US20150147063 INTERFEROMETER CONFIGURED FOR SIGNAL PROCESSING IN AN INTERFERENCE PATH  
An interferometer is provided that includes a first path and a second path. The first path is configured to propagate an electro-magnetic signal at a first wavelength. The second path is...
US20090021746 TOMOGRAPHY APPARATUS  
In a tomograpy apparatus: low-coherence laser light is split into measurement light and reference light; the frequency of the reference light is slightly shifted from the frequency of reflected...
US20100091265 Fiber optic sensor head and interferometric measuring system  
A fiber optic sensor head for detecting the shape or the distance of a test object has an optical fiber, in particular a glass fiber, for conducting and returning partial beams to and from the...
US20090046296 FIBER-OPTIC HETERODYNE IMAGING VIBROMETER  
A method and system for performing two-dimensional laser Doppler vibrometry (LDV) are disclosed. A high speed fiber optic heterodyne imaging vibrometer can be used for the imaging of high speed...
US20100245835 ULTRAFAST CHIRPED OPTICAL WAVEFORM RECORDER USING REFERENCED HETERODYNING AND A TIME MICROSCOPE  
A new technique for capturing both the amplitude and phase of an optical waveform is presented. This technique can capture signals with many THz of bandwidths in a single shot (e.g., temporal...
US20110235049 Wavefront Sensing Method and Apparatus  
Wavefront sensing apparatus comprises a beam splitter (106) for combining a wavefront to be characterised (105) with a frequency-shifted plane wavefront (111) and a bundle of optical fibres (112)...
US20080225269 SYSTEM AND METHOD FOR RATIOMETRIC NON-LINEAR COHERENT IMAGING  
The present invention includes a system and method for coherent imaging. The system of the present invention includes a light source adapted to provide coherent light to illuminate a sample...
US20100014096 OPTICAL SENSING SYSTEM AND OPTICAL DEVICES THEREFOR  
A sensing system comprises a light source having three or more distinct wavelengths for illuminating a plurality of distinct areas in a field of view, a sensor for measuring the reflectance of the...
US20080117427 OPTICAL TOMOGRAPH  
An optical tomograph is equipped with: a light source unit for emitting a plurality of light beams, the wavelengths of which are swept within different predetermined wavelength bands respectively...
US20100141956 DUAL BEAM HETERODYNE FOURIER DOMAIN OPTICAL COHERENCE TOMOGRAPHY  
The present invention relates to an apparatus and a method combining achromatic complex FDOCT signal reconstruction with a common path and dual beam configuration. The complex signal...
US20100068655 POSITION MEASURING MODULE, POSITION MEASURING APPARATUS, STAGE APPARATUS, EXPOSURE APPARATUS AND DEVICE MANUFACTURING METHOD  
A position measuring module includes a movement mirror provided on a movable member and having a reflecting surface along a first axis direction; detection-light units which are arranged for a...
US20090225326 CHARGED PARTICLE BEAM APPARATUS AND DISPLACEMENT DETECTING CIRCUIT  
An object of this invention is to provide a charged particle beam apparatus that can easily evaluate the stability of a position that is irradiated with a charged particle beam. To achieve the...
US20080297806 APPARATUS AND METHOD FOR CONTROLLING RANGING DEPTH IN OPTICAL FREQUENCY DOMAIN IMAGING  
Exemplary embodiments of an apparatus are provided. For example, the exemplary apparatus can include at least one first arrangement providing at least one first electro-magnetic radiation to a...
US20050078317 Synchronizing the filter wavelength of an optical filter with the wavelength of a swept local oscillator signal  
Ensuring that a tunable device, such as a tunable optical filter, accurately tracks the wavelength of a local oscillator signal involves generating at least one synchronization signal as the local...
US20090323061 Multi-color hetereodyne interferometric apparatus and method for sizing nanoparticles  
A nanoparticle sensor is capable of detecting and recognizing single nanoparticles in an aqueous environment. Such sensor may find applications in broad areas of science and technology, from the...
US20060061770 Heterodyning time resolution boosting method and system  
A method for enhancing the temporal resolving power of an optical signal recording system such as a streak camera or photodetector by sinusoidally modulating the illumination or light signal at a...
US20150085296 PHOTOACOUSTIC MICROSCOPE  
Provided is a photoacoustic microscope, including: an objective lens configured to collect excitation light into a specimen, the excitation light in a wavelength range that is absorbed by an...
US20100128279 SCANNING MICROSCOPE USING HETERODYNE INTERFEROMETER  
The present invention relates to a scanning microscope using a heterodyne interferometer, which can be used for mapping or imaging complex optical parameters such as physical structures and...
US20140253927 ACOUSTIC SIGNAL RECEIVING APPARATUS AND PHOTO-ACOUSTIC TOMOGRAPHY  
An acoustic signal receiving apparatus including: a Fabry-Perot sensor including a Fabry-Perot interferometer configured to convert an acoustic wave into a light intensity signal; a control unit...
US20070208237 METHOD OF USING A MICRO OPTICAL SENSOR DEVICE  
A method of using a sensor device for measuring a concentration of a substance within a sample includes inserting a tip portion of a sensor into a sample. The sensor has an optical transmission...
US20100253950 Carrier-Envelope Phase Shift Using Linear Media  
The carrier-envelope phase in a train of optical pulses is varied utilizing the dispersive properties of lossless plates while the total dispersion in transmission is maintained practically...
US20130258348 METHOD AND APPARATUS FOR MEASURING THE REFRACTIVE INDEX OF AIR BASED ON THE LASER SYNTHETIC WAVELENGTH INTERFEROMETRY  
The present invention discloses a method and an apparatus for measuring the refractive index of air based on the laser synthetic wavelength interferometry, wherein a laser synthetic wavelength...
US20130107276 DEVICE AND METHOD FOR INTERFEROMETRIC MEASURING OF AN OBJECT  
A device for the interferometric measuring of an object, including a light source to generate an emitted beam, a beam splitting device for splitting the emitted beam into a measuring beam and at...
US20130100458 MULTI-WAVELENGTH INTERFEROMETER, MEASUREMENT APPARATUS, AND MEASUREMENT METHOD  
A multi-wavelength interferometer includes a beam splitter configured to split plural light fluxes into a reference beam and a measurement beam, a frequency shifter configured to shift a frequency...
US20110096334 HETERODYNE INTERFEROMETER  
A heterodyne interferometer includes a light source, an optical system, and a signal generator including at least two light-receiving elements that respectively output a first signal and a second...
US20170125975 LASER DEVICE, INFORMATION ACQUISITION DEVICE, AND IMAGING SYSTEM  
One or more laser devices, one or more information acquisition devices, one or more imaging systems, and one or more methods for use with same are provided. Embodiments of wavelength-tunable type...
US20170074640 APPARATUS AND METHODS FOR ONE OR MORE WAVELENGTH SWEPT LASERS AND THE DETECTION OF SIGNALS THEREOF  
An optical instrument including at least a first and second wavelength swept vertical cavity laser (VCL) sources. The wavelength sweeping ranges spanned by the first and second VCL sources may...
US20160282190 TIME-MULTIPLEXED SPECTRALLY CONTROLLED INTERFEROMETRY  
A tunable light source having a temporal coherence length such that interference fringes are detected within the optical path difference of the interferometer is spectrally controlled to produce...
US20160282103 HETERODYNE SPECTRALLY CONTROLLED INTERFEROMETRY  
Heterodyne interferometry is combined with spectrally-controlled interferometry (SCI) to achieve the advantages of both. Phase shifts produced by SCI produce phase-shifted correlograms suitable...
US20160146590 Dual Wavelength Dual Interferometer with Combiner-Splitter  
The system includes a dual interferometer sub-system including a first and second channel. The system includes an illumination source. The illumination source includes a first laser source...
US20160061716 PHASE SEPARATION OBSERVATION METHOD, PHASE SEPARATION OBSERVATION APPARATUS, ANNEALING APPARATUS, AND PRODUCING METHOD FOR SUBSTRATE  
A phase separation observation method according to one embodiment includes determining a progress degree of phase separation of a self-assembly material layer. The progress degree is determined...
US20150338202 INTERFEROMETRIC APPARATUS AND SAMPLE CHARACTERISTIC DETERMINING APPARATUS USING SUCH APPARATUS  
An interferometer apparatus comprising: a short coherence length or broadband light source; a light director to direct light from the light source along a measurement path to a surface of a sample...
US20140307263 MEASURING APPARATUS AND ARTICLE MANUFACTURING METHOD  
Provided is a measuring apparatus that includes a heterodyne interferometer; a first detector configured to detect interference light between reference light and light to be detected, and output a...
US20130063728 MEASURING APPARATUS  
A measuring apparatus includes an optical frequency comb source configured to emit an optical frequency comb in which a plurality of frequency components are arranged at equal frequency intervals,...
US20120320381 MEASUREMENT APPARATUS AND MEASUREMENT METHOD  
A measurement apparatus obtains a reference signal from light modulated by a first frequency, obtains a measurement signal from light modulated by the first frequency and a second frequency, and...
US20110085173 Phase From Defocused Color Images  
Phase differences associated with a defocused wavefront can be determined from a single color image. The color image, which is a measurement of intensity as a function of wavelength, is used to...

Matches 1 - 47 out of 47