Abstract: Disclosed is a system and method for interrogating a photo-responsive material, such as for authentication purposes, utilizing a light source to illuminate a photo-responsive material, a detector to capture an emission from the photo-responsive material, and a processor to receive a response from the detector while the photo-responsive material is being illuminated after a maximum response has been received, then measuring a change in the received response.

Abstract: Input light comprising an optical signal associated with a spectrum of at least a portion of the input light is received into an interferometer. Data comprising an image is provided using a detector array comprising detection elements. Output light is received from the interferometer into a set of one or more optical elements, which provide an optical interference pattern associated with an intensity of at least a portion of the output light that is distributed over a set of detection elements. Detection of the optical signal is stabilized based at least in part on the data using a control system comprising: a light-control module that controls a first feedback loop that stabilizes the portion of the output light; and/or a temperature-control module that controls a second feedback loop that stabilizes a temperature sensed by at least one temperature sensor within a thermal environment associated with the interferometer.

Abstract: A system includes a plurality of modular subassemblies and a plate; wherein each modular subassembly comprises an enclosure and a plurality of optical components aligned to the enclosure, and each enclosure comprises a plurality of mounting structures; and wherein each modular subassembly is mechanically coupled to the plate by attachment of a mounting structure of the modular subassembly directly to a corresponding mounting structure located on the plate, such that by mechanically coupling each modular subassembly to the plate using the mounting structure of the modular subassembly and the corresponding mounting structure on the plate, adjacent modular subassemblies are aligned to each other upon such attachment, and wherein two of the modular subassemblies mechanically coupled to the plate are also attached to each other by mechanically coupling an alignment structure on one of the two modular subassemblies to a respective alignment structure on the other of the two modular subassemblies.

Abstract: A combining light emitted from a measurement point of an object to be measured into one parallel light beam by combining optical system; dividing, by phase shifter, parallel light beam emitted from combining optical system into first and second light beam, emitting first and second light beam toward light-receiving face while providing an optical path length difference between the first and second light beam, and causing the first and second light beam to planarly enter the light-receiving face so that at least a part of an incident region of first light beam on the light-receiving face and at least a part of an incident region of second light beam overlap with each other; and obtaining an interferogram at measurement point based on intensity distribution of light in a region where an incident region of the first and second light beam on light-receiving face overlap, and acquiring spectrum by Fourier-transforming interferogram.

Abstract: Disclosed is a process for determining a plurality of color quality indicators for controlling the color of a coating. Colorimetric coordinates of a color reference and the coating are ascertained for a plurality of coated surface elements using a spectrophotometer at a number of measurement geometries and a number of light sources. For each measurement geometry and each light source, color differences are calculated from the colorimetric coordinates of the color reference and the coating of the plurality of coated surface elements. The respective colorimetric coordinates are normalized with one weighting factor. Each of the plurality of color quality indicators is determined by means of a mapping, of functional values onto a scale value of a predetermined scale. The functional values are determined in each case for the number of measurement geometries and the number of light sources by means of a mathematical relationship.

Abstract: An apparatus for dental imaging comprises a light source for generating light, an optics system for focusing the light, and a light-guiding part having an entrance face and an exit face. The light source, the optics system and the light-guiding part are arranged such that the light passes through the optics system, enters the light-guiding part via the entrance face, and exits the light-guiding part via the exit face. The optics system is configured such that, upon entering the light-guiding part, an outermost chief ray of the light with respect to an optical axis of the optics system is divergent to the optical axis and an outermost marginal ray of the light with respect to the optical axis is parallel or divergent to the optical axis.

Abstract: A method of spectroscopically assessing the chemical composition of a bubble while the bubble constrains a gas within the interior of the bubble by passing light passing through the bubble and comparing properties of the light before and after the light has passed through the bubble. The bubble is located, preferably compressed between a first plate and a second plate providing a compressed bubble with relatively flat first polar end wall portion adjacent the first plate in a relatively flat second polar end wall portion adjacent a second plate and directing the light to pass through the bubble via the first and second polar end wall portions.

Abstract: A measurement arrangement for measuring diffusely reflected light and specularly includes a measurement light source for generating measurement light, an optical receiver for receiving measurement light, and a first mirror for reflecting the measurement light emerging from the measurement light source. The measurement arrangement additionally comprises a second mirror for reflecting diffusely reflected measurement light to the optical receiver. A settable third mirror is also provided, which in a first position is aligned for directing the measurement light that was directed onto a sample by the first mirror and specularly reflected by the sample to the optical receiver. The third mirror in a second position releases a beam path between the second mirror and the optical receiver, so that the measurement light directed onto the sample by the first mirror and diffusely reflected by the sample to the second mirror is directed to the optical receiver by the second mirror.

Abstract: A device includes a filter that enhances a beam profile of a received pulsed laser; a first optical element to direct the pulsed laser as a reference wave towards an optical sensor; an open cavity positioned between the first optical element and the optical sensor. The open cavity receives an aerosol particle, which enters the open cavity from any direction. The reference wave illuminates the aerosol particle. An illuminated particle generates and directs an object wave towards the optical sensor. A pixel array is connected to the optical sensor. The pixel array receives the reference wave and the object wave. The optical sensor creates a contrast hologram comprising an interference pattern of the illuminated particle. A processor creates an image of the illuminated particle based on the contrast hologram.

Abstract: An interferometer device includes an interferometer unit with at least two mirrors disposed in parallel, wherein at least one of the mirrors is actuatable parallel to the other mirror and a first distance between the two mirrors is alterable. The interferometer device further includes at least one deflection mirror disposed downstream of the interferometer unit in a light transmission direction of light from the interferometer unit and a detector device, onto which the light is able to be aligned by the deflection mirror. The detector device includes at least two differently sensitive detection regions for transmitted wavelengths or wavelength ranges of the light, which detection regions are spatially separated from one another and able to be irradiated separately by the deflection mirror.

Abstract: A standard reference material interface for a Raman probe includes a locator including a housing having a first end and a second end, the first end including an attachment portion configured to mate with an attachment portion of the Raman probe. The locator defines a central axis that intersects the first end and the second end. The standard reference material interface also includes a hermetically sealed standard reference material enclosure positioned at the second end of the housing and enclosing a standard reference material. An optical port is positioned within the housing between the Raman probe and the standard reference material relative to the central axis. The optical port includes a window.

Abstract: A method has been developed to improve the stability of a color measurement system that measures reflectances using matrix-transformation method. The transformation matrix can be obtained by training with a raw measurement matrix and a master reflectance matrix. The raw measurement matrix can be stacked with one or more of its variations, with each variation being some random noise added onto a part or the whole original raw signal matrix. The same number of master reflectance matrices are also stacked to match the size and sample ordering of the raw measurement matrix. The resulting transformation matrix will be more stable and less sensitive to the measurement noise.

Abstract: An improved vehicle surface scanning system for assessing the damaged surfaces of a vehicle with resulting estimates of repair costs. A mobile scanning booth is assembled in an open-ended tunnel-like rig having a plurality of reflective panels positioned along opposite sides and across the roof of the booth to serve as deflection screens. A plurality of scanner modules are mounted in fixed positions about opposite ends of the booth and positioned to face the interior of the booth. Wheels provide controlled locomotion/movement of the scanning booth over the vehicle. The scanner modules use a combined hybrid methodology of active stereo 3D reconstruction and deflectometry to acquire data measurements along the surfaces of the vehicle incrementally as the booth is moved. The incremental measurement data acquired during the mobile scanning is processed and furthermore combined to produce accurate reports of the damage surfaces and estimates of associated repair costs.

Abstract: The present disclosure relates to systems and methods that facilitate light detection and ranging operations. An example transmit block includes at least one substrate with a plurality of angled facets. The plurality of angled facets provides a corresponding plurality of elevation angles. A set of angle differences between adjacent elevation angles includes at least two different angle difference values. A plurality of light-emitter devices is configured to emit light into an environment along the plurality of elevation angles toward respective target locations so as to provide a desired resolution and/or a respective elevation angle. The present disclosure also relates to adjusting shot power and a shot schedule based on the desired resolution and/or a respective elevation angle.

Abstract: An adaptive focusing system including an optics module, an optics module height positioner (OMHP), a position sensor operative to generate a position output indicating a height of the optics module, a predictive height estimator operative to generate an estimated height value of a sample at each site of a plurality of sites, and generate a desired optics module height output for each of the sites, a regulator operative to generate, at least partially based on the desired optics module height output and a known height of the optics module, a sequence of optics module height control instructions for the plurality of sites, a driver operative to provide a sequence of control outputs to the OMHP and a model predictive controller (MPC) operative to monitor differences between a reported height of the optics module and an MPC-expected height of the optics module, thereby to generate system amelioration values.

Abstract: A fluid measuring apparatus is provided with: an irradiating device configured to irradiate a fluid with light; a light receiving device configured to receive light scattered by the fluid; a detecting device configured to detect a backflow of the fluid on the basis of a received light signal of the light receiving device; and a calculating device configured to calculate estimated concentration information indicating a concentration of the fluid, on the basis of a detection result of the detecting device and the received light signal of the light receiving device. By this, even if the backflow temporarily occurs in the fluid, the fluid concentration can be accurately measured.

Abstract: An integrated fiber interferometry interrogator for generating superimposed waves is disclosed. The system is optimized for efficiency and vibration attenuation. The system comprises an optical light source for generating a first signal, a first signal splitter which splits the first signal into a reference signal and an interrogation signal, optical modulators for modulating the signals, a fiber coupler connected to a fiber under test, an isolator, a circulator with a plurality of connections for directing the signals, a signal mixer for mixing the signals into superimposed waves, and photo diodes for receiving the superimposed waves.

Abstract: The optical scanning device includes a swingable reflector; a blocking unit that is provided in the reflector to move in linkage with the reflector; and a sensor unit that includes at least a first sensor unit and a second sensor unit, wherein each of the first and second sensor units includes an output unit, which is a light generator or an electromagnetic wave generator configured to output a detection target and a detection unit, which is a light receiver or an electromagnetic wave receiver configured to detect the detection target. The output unit is at a position that faces the detection unit. When the reflector is in a predetermined swing angle range, the blocking plate blocks a path of the detection target between the output unit and the detection unit.

Abstract: Disclosed herein are a diagnostic method using laser induced breakdown spectrum analysis and a diagnostic device for performing the same. The diagnostic device may include a laser projection module projecting a pulsed laser to a specimen, a light receiving module receiving a light generated by a plasma ablation induced at the specimen by the pulsed laser, a spectral member receiving and dividing the light generated by the plasma ablation; a sensor array including a plurality of sensors arranged to receive the divided light for each wavelength, and a controller obtaining spectrum data of the light generated by the plasma ablation from a specific exposure period, and determining whether or not the specimen is diseased based on the spectrum data of the light generated by the plasma ablation.

Abstract: Systems and methods of using the same for functional fluorescence imaging of live cells in suspension with isotropic three dimensional (3D) diffraction-limited spatial resolution are disclosed. The method-live cell computed tomography (LCCT)-involves the acquisition of a series of two dimensional (2D) pseudo-projection images from different perspectives of the cell that rotates around an axis that is perpendicular to the optical axis of the imaging system. The volumetric image of the cell is then tomographically reconstructed.