Abstract: An apparatus for inspecting an integrated circuit is an apparatus for inspecting an integrated circuit having a semiconductor substrate and a circuit portion formed on a front face a side of the semiconductor substrate. The apparatus comprises a light generation unit for generating light L for irradiating the integrated circuit, a wavelength width adjustment unit, for adjusting the wavelength width of the light irradiating the integrated circuit, an irradiation position adjustment unit for adjusting the irradiation position of the light irradiating the integrated circuit, and a light detection unit for detecting the light from the integrated circuit when the light from the light generation unit irradiates the circuit portion through a rear face of the semiconductor substrate.

Abstract: The present disclosure is generally directed to a strain sensor, system and method of fabrication and use that includes an optical fiber, an optical signal generator that transmits an optical signal through the optical fiber, at least two photonic crystal slabs within the optical fiber separated by a first segment of optical fiber, a photo-detector that detects a reflected optical signal from the at least two photonic crystal slabs, and a processor that computes a mechanical strain over the first segment of optical fiber based on the reflected optical signal detected by the photo-detector.

Abstract: A method for the acquisition (AU) of a spectrally resolved, two-dimensional image by means of Fourier transform (FT) spectroscopy or Fourier transform infrared (FTIR) spectroscopy, is characterized in that, during multiple passes (D1-D4) of an optical path difference (OG) between two partial rays (14a, 14b) over an identical range (IB), different subsets of detector elements (22) of an array detector (5) are read out and the signals of the read-out detector elements (22) of the multiple passes (D1-D4) are Fourier transformed and combined to form the spectrally resolved image. A method is thereby provided for the acquisition of two-dimensional, spectrally resolved images, in which the influence of vibrations on the measurement is reduced, and which is less affected by the movement of objects to the resolved spectrally.

Abstract: An optical tracking device that is capable of operation on both glossy and diffuse surfaces includes at least one housing, at least one light source, and at least one sensor. The light source emits light toward a surface on which the housing is moved and the sensor receives the light emitted by the light source after it is reflected off of the surface. The light source is oriented such that the angle of incidence of the emitted light corresponds to Brewster's angle. The sensor may be also oriented such that the angle of reflection of the reflected light corresponds to Brewster's angle. The light emitted by the light source may be polarized to increase the p-polarization of the emitted light and/or the light received by the sensor may be filtered to block s-polarized portions of the reflected light.

Abstract: An optically corrective microprobe for white light interferometry is disclosed. In white light interferometry which uses different spectral ranges, the dispersion-induced dependency of optical path differences on the wavelength between measurement light bundle and reference light bundle is compensated by an efficient, easily miniaturized arrangement. A reference beamsplitter with partially reflecting filters in at least two different spectral ranges for generating at least two transmitted measurement light bundles and associated reflected reference light bundles of nonoverlapping spectral ranges is arranged between the light output surface of the light-conducting fiber and the focusing optics.

Abstract: A conveying apparatus for conveying an object, the object having at least a non-opaque portion, including a light source, an optical detector and a backing measurement apparatus, the light source for illuminating the object, the optical detector for acquiring information at least relating to at least one chromatic characteristic of the non-opaque portion, the backing measurement apparatus including a backing material, a backing support and a plurality of rollers, the backing material exhibiting at least one of determined chromatic characteristics and determined optical characteristics, the backing support for supporting the backing material, the plurality of rollers for rolling the backing material over the backing support, wherein light emitted by the light source optically interacts with the backing material consistently through the non-opaque portion.

Abstract: Provided is an optical measuring device capable of easily improving accuracy in measurement of a measurement object. Light is projected from a light projecting unit into a measurement space. Light passing through the measurement space is directed toward a first image sensor through a first optical system, and directed toward a second image sensor through a second optical system. Within the measurement space, a position of a first focus of the first optical system and a position of a second focus of the second optical system in an X direction are different from each other. Whether the measurement object is positioned at the first focus, on a side of the first focus closer to the light projecting unit, or on a side of the first focus away from the light projecting unit is determined based on the signals outputted from the first and the second image sensor.

Abstract: An optical coherence tomography imaging system includes a Fourier domain optical coherence tomography sensor system, a signal processing system configured to communicate with the Fourier domain optical coherence tomography sensor system to receive detection signals therefrom and to provide imaging signals, and an image display system configured to communicate with the signal processing system to receive the imaging signals. The signal processing system includes a parallel processor configured to calculate structure information and Doppler information from the detection signals in real time such that the imaging signals provide a real time display of combined structure and flow of an object under observation.

Abstract: Tunable light source systems and methods with wavelength reference capability are disclosed. A method includes reference filtering a portion of a tunable light beam while the tunable center wavelength ?C is tuned over a range by adjusting a wavelength tuning parameter x. The method also includes detecting the reference-filtered tunable light beam and generating therefrom at least one detected light spectrum as a function of the tunable center wavelength ?C. The method further includes determining a reference wavelength tuning parameter xCR corresponding to a reference tunable center wavelength ?CR based on a maximum value of the at least one detected light spectrum.

Abstract: A signal amplifier is provided via a triple Mach-Zehnder interferometer (MZI) apparatus for determining intensity distribution at either a first port or a second port by a photon from a source. The first and second ports correspond to respective first and second directions. The MZI apparatus includes four beam-splitters disposed co-linearly in parallel between the source and the ports, six parallel mirrors, and first and second path projectors. Three of these mirrors are displaced along the first direction from the beam-splitters, while the remaining mirrors are displaced along the second direction. The path projectors conduct weak measurement of a photon occupation number and are disposed between the second beam-splitter and an adjacent downstream mirror. The output port is disposed beyond the fourth beam-splitter in the first direction. The intensity distribution at the output port is positive in response to one of the first measurement being positive and the second measurement being negative.

Abstract: An optical fiber coil including an optical fiber having a first end and a second end, the optical fiber including first, second, third and fourth segments, wherein the first segment is contiguous with the second segment, the second segment is contiguous with the third segment, and the third segment is contiguous with the fourth segment, and plural substantially planar layers stacked along a coil axis, the layers including a first planer layer formed from the first segment, a second planar layer formed from the second segment, a third planar layer formed from the third segment, and a fourth planar layer formed from the fourth segment, wherein the fourth planar layer is positioned between the first planar layer and the second planar layer, and wherein the second planer layer is positioned between the third planer layer and the fourth planar layer.

Abstract: An interferometric system includes a polarization separation element (10), a first polarization conversion element (11), a Mach-Zehnder interferometer (2) including a first (4) and second (5) arms connected to one another by a first (6) and second (7) ends in order for a first and second beams (20, 21) having the same polarization to pass through the interferometer in a reciprocal manner in opposite directions of propagation, respectively, so as to form a first and second interferometric beam (22, 23), a second polarization conversion element (11) for obtaining an interferometric beam (24), the polarization of which is converted, a polarization-combining element (10), and a detection element (8) suitable for detecting an output beam (25).

Abstract: Swept source designs that eliminate or significantly reduce artifacts in optical coherence tomography are presented. One embodiment of the present invention is a source design that frequency shifts the coherence revival interference signal to a frequency larger than the A/D detection bandwidth or the post-processing bandwidth. In another embodiment, the introduced frequency shift is large enough to introduce a Doppler shift of the modes of the laser, which causes a blurring of the comb function, and thus eliminates or reduces mode hopping. In another embodiment, adjusting the cavity optical path length prior to data acquisition depending on the given optical layout configuration to reduce or eliminate coherence revival artifacts is described.

Abstract: A method to assess perspiration reduction of a composition comprising obtaining an amount of water in stratum corneum in a first area of skin on an individual using confocal Raman spectroscopy, applying a composition to the first area of skin on the individual, having the individual perform an activity to cause the individual to perspire, and obtaining an amount of water in stratum corneum in the first area of skin on the individual after the activity using confocal Raman spectroscopy.

Abstract: An optical imaging device which receives an optical collimated input beam, the device having a pair of axicon lenses through which a beam is directed to generate a collimated ring beam, wherein the ring beam is scattered from a substance to generate a return beam, and to bypass a reflector that redirects the return beam to prevent the return beam from interfering with the input beam; and a detector which detects an image projected by the return beam.

Abstract: An arrangement and a method are provided for robust interferometry for detecting distance, depth, profile, form, undulation, flatness deviation and/or roughness or the optical path length in or on technical or biological objects, including in layered form, or else for optical coherence tomography (OCT), with a source of electromagnetic radiation and with an interferometer, in particular also in the form of an interference microscope, having an object beam path and having a reference beam path, in which an end reflector is arranged, and a line-scan detector for detecting electromagnetic radiation in the form of at least one spatial interferogram.

Abstract: An apparatus for detecting gas concentrations includes a coded filter to oscillate proximate a resonant frequency. A photo detector is positioned below the coded filter such that the coded filter selectively blocks light that is directed at the photo detector. Optics are positioned to project spectral information on to the coded filter. A processor analyzes a signal received from the photo detector. The processor is adapted to weight a harmonic attic signal.

Abstract: A device for detecting gas concentrations includes a movable coded filter. An optical element is positioned to receive gas filtered light and spectrally separate the gas filtered light. A photo detector is positioned to receive the spectrally separated light through slits in the moveable coded filter to provide an AC signal representative of a selected gas.

Abstract: Disclosed is a system for aligning a collimator tube with an alignment ring used to hold a film or sensor aligned with the collimator tube. The disclosed alignment system includes a light source, a light detector, and a reflective surface, where, when the collimator and alignment ring are aligned, light emitted from the light source reflects off the reflective surface and is received by the light detector.

Abstract: Provided is a detection optical system that is provided with a dispersed-light detection function and that can increase the amount of detected light by enhancing the diffraction efficiency. A detection optical system is employed which includes a transmissive VPH diffraction grating that disperses fluorescence from a specimen into a plurality of wavelength bands; a rotating mechanism that rotates the VPH diffraction grating about an axial line that is perpendicular to an incident optical axis of the fluorescence from the specimen and an emission optical axis from the VPH diffraction grating; a light detection portion that detects the fluorescence from the specimen that has been dispersed by the VPH diffraction grating; and a correcting portion that corrects an incident position on the light detection portion in accordance with a displacement of the optical axis caused by the rotation of the VPH diffraction grating in synchronization with the rotating mechanism.