Abstract: The invention provides a method for homogenized coherent excitation of a sample for determining molecular structure. The method includes selecting a monochromatic coherent light, homogenizing the monochromatic coherent light; irradiating the sample with the homogenized monochromatic light; collecting the Raman scattered light to obtain a profile and analyzing the profile to obtain chemical specific signature of the sample. The invention also provides a method for obtaining two dimensional imaging of a sample using irradiation of large sample area by homogenized monochromatic light without compromise in spatial resolution. A system for homogenized coherent excitation of a sample for determining molecular structure is also provided.

Abstract: An optical technique for voltage contrast imaging of the active electronic properties of semiconductors, including semiconductor surfaces, periodic structures, and electrically active defects, is disclosed. A pump laser beam is used to produce a modulated photovoltage in a semiconductor sample and a second probe laser beam is used to detect synchronous changes in the reflectance of the sample, resulting in a non-contact voltage contrast imaging capability. Exemplary optical configurations enabling high-throughput voltage contrast inspection of electrically active defects are discussed.

Abstract: Optically computed phase imaging systems and methods are provided. An example system includes an interferometer configured to output 3D spatial-spectral data of a sample including an interferometric signal and an optical computation assembly having a spatial light modulator configured to modulate the 3D spatial-spectral data with a modulation pattern. The modulation pattern modulates the interferometric signal along a spectral dimension to select a depth to obtain a sample signal at the selected depth and modulates the interferometric signal along a first spatial dimension to create a waveform to facilitate phase extraction. The system further includes a detector configured to detect 2D spatial data of the sample. The system further includes a processor coupled to a memory, the processor configured to process the 2D spatial data to extract phase information of the sample.

Abstract: Implementations disclosed describe, among other things, a system and a method of scanning a substrate with a beam of light and detecting for each of a set of locations of the substrate, a respective one of a set of intensity values associated with a beam of light reflected from (or transmitted through) the substrate. The detected intensity values are used to determine a profile of a thickness of the substrate.

Abstract: A temporal magnification spectrometer includes a dual-chirp comb source, a signal leg, a local oscillator leg, an optical detector, and a temporal magnification analyzer. The dual-chirp comb source produces optical carrier laser light. A signal comb having signal linearly chirped waveforms interacts with a sample to produce a transmitted signal comb. The local oscillator leg produces a local oscillator comb having local oscillator linearly chirped waveforms. The optical detector receives the transmitted signal and local oscillator combs and produces an RF domain signal. The analyzer receives and Fourier transforms the RF domain signal to produce an RF comb, which is sampled to produce sampled RF comb lines, which are normalized to produce temporally magnified sample frequency domain data. Intermediate sample temporal data are normalized to produce a steady-state sample spectral response.

Abstract: A readout circuit for an amplitude modulating sensor includes a first and second wavelength light source; an optical coupler coupled to receive a first light signal from the first wavelength light source and a second light signal from the second wavelength light source; a frequency selector that allows for the first light signal to pass to the amplitude modulating sensor; and a detector system coupled to the optical coupler to receive the first light signal and the second light signal after the first light signal is modulated by the amplitude modulating sensor and independently detect the two signals. The detector system generates electronic signals representing the modulated first light signal and the second light signal and removes a common mode signal of the modulated first light signal and the second light signal, removing common mode noise or attenuation in the modulated first light signal.

Abstract: Embodiments of the present invention relate to apparatus and methods for dual comb spectroscopy with deterministic stepping and scanning of temporal pulse offset. In one embodiment, the present invention relates to a novel dual-comb spectroscopy including mode locked robust Er-combs and digital phase-locking electronics for step scanning between the two frequency combs and applicable to any phase-locked dual-comb system. The tight phase control of the DCS source allows for the control of temporal offset between the two comb pulses during measurements.

Abstract: A multifunctional ranging telescope includes a main body, a wind direction and wind speed sensing device, a display device and a power source. The wind direction and wind speed sensing device is movably connected to the main body and includes a sensing element. When the wind direction and wind speed sensing device moves to a sensing position, the sensing element is located outside the main body. The display device is located on a surface of the main body and electrically connected to the wind direction and wind speed sensing device to display a wind direction and wind speed information. The power source is configured to supply power to the wind direction and wind speed sensing device and the display device.

Abstract: In an embodiment, an apparatus includes a meta-optics lens having a point spread function. The meta-optics lens is configured to receive light associated with a scene and output transformed light. At least one value of at least one mathematical property of the transformed light is dependent upon a set of wavelengths associated with the transformed light. The apparatus further includes a processor configured to receive a representation of the transformed light. The processor is further configured to determine the at least one value of the at least one mathematical property of the transformed light using the representation of the transformed light. The processor is further configured to determine spectrum information associated with the scene based on the at least one value and the point spread function.

Abstract: A crossbeam for measuring deformation velocities of a surface of a material under a dynamic load includes a crossbeam body, a first type of velocimeter and a second type of velocimeter-mounted on the crossbeam body. The crossbeam body is mounted on a measurement carrier. The measurement carrier is configured to move along the surface of the material and apply a dynamic load to the surface. The first type of velocimeter is configured to measure the vertically resilient deformation velocity of the surface behind an action force of the dynamic load. The second type of velocimeter is configured to measure the vertical downward deformation velocity of the surface in front of the action force of the dynamic load. The vertically resilient deformation velocity and the vertically downward deformation velocity of the surface can be simultaneously and quickly obtained by the first and second types of velocimeters.

Abstract: Disclosed herein are methods, devices, modules, and systems which may be employed for accurate targeting of objects. A method of point-to-point targeting may be implemented by systems with two or more sensors to locate an object and coordinate a handoff between the two or more sensors. These methods, devices, modules, and systems may be used for automated crop cultivation or maintenance. Devices disclosed herein may be configured to locate, identify, and autonomously target a weed with a beam, such as a laser beam, which may burn or irradiate the weed. The methods, devices, modules, and systems may be used for agricultural crop management or for at-home weed control.

Abstract: The single-use disposable spectrophotometer described herein can measure one or more blood chemistry analytes from a drop of whole blood. A passive filtration system takes whole blood and delivers plasma along with a dissolved reporter molecule to one or more spectrophotometers which can operate with narrow band optical spectrum centered on an optical detection frequency. The spectrophotometer detects the changes in absorption of the plasma as a result of a chemistry reaction to determine the concentration or activity of one or more analytes.

Abstract: To provide a light source device for a fiber optic gyroscope capable of broadening the bandwidth of the laser light and improving stability of a scale factor. A light source device for a fiber optic gyroscope configured to drive a fiber optic gyroscope includes: a laser light source 10, a stabilizing part 20, and a bandwidth broadening part 30. The laser light source 10 emits a laser light of a predetermined frequency. The stabilizing part 20 stabilizes the predetermined frequency of the laser light emitted from the laser light source 10. The bandwidth broadening part 30 makes the laser light stabilized by the stabilizing part 20 into a light having a continuous broadband spectrum.

Abstract: To accurately measure chromaticity and turbidity while achieving downsizing and employing a turbidity measurement method based on water quality standards of each country, an optical measurement includes a cell that accommodates a liquid sample, a transmitted light measurement light source that irradiates the liquid sample in the cell with light for transmittance, a scattered light measurement light source that irradiates the liquid sample in the cell with light for scattering, a photodetector that detects light from both sources, and a reflection mirror that reflects the light for transmittance in the cell to cause the light for transmittance to be directed to the photodetector. The scattered light measurement light source emits the light for scattering toward a post-reflection optical path of the light for transmittance reflected by the reflection mirror and directed to the photodetector so that the light for scattering intersects the post-reflection optical path at a predetermined angle.

Abstract: The present invention addresses to a multidirectional dynamic phase shifting interferometry (DPSI) shearography and interferometry sensor. The present invention uses a configuration with three fixed prisms, or a single fixed three-facet optical prism constructed so as to achieve the same effect as three prisms and thus simultaneously obtain three images with phase shifting. The present invention also encompasses a method of inspection and measurement of vibration modes using said sensor.

Abstract: An adjuster performs simultaneous irradiation of M laser beams to an atomic beam, where M is a predetermined integer satisfying 3?M. The course of each of the M laser beams intersects with an approach path of the atomic beam. A component, in a direction perpendicular to the approach path of the atomic beam, of the sum of radiation pressure vectors that the M laser beams respectively have is non-zero. A component, in a direction of the approach path of the atomic beam, of the sum of the radiation pressure vectors that the M laser beams respectively have is negative for atoms having speeds greater than the predetermined speed, and positive for the atoms having speeds smaller than the predetermined speed.

Abstract: A system comprises a faceted structure imaging assembly and a faceted structure image analyzer. Signature information of the gemstone is obtained and compared to stored signature information. The signature information includes angular spectrum information generated by the imaging assembly while a colored light pattern is reflected onto the gemstone. The signature information uniquely identifies the gemstone and indicates whether an entity was the source of the gemstone. The signature information comparison involves comparing an angular spectrum image obtained by the imaging assembly to stored angular spectrum images. In one example, the system compares the obtained signature information to stored signature information to validate a source of the gemstone. In another example, the system obtains signature information of the gemstone and forwards the signature information to a remote validation system.

Abstract: A micro light emitting device inspection apparatus adapted to inspect a plurality of micro light emitting devices is provided. The micro light emitting device inspection apparatus includes a carrier stage, a light guide module and a detective module. The carrier stage is configured to hold the micro light emitting devices. The light guide module has a plurality of optical fibers. Each of the optical fibers has a light receiving surface and a light emitting surface away from each other. The at least one light beam is received by the light receiving surface of each optical fiber and exits through the light emitting surface of the optical fiber. The detective module is configured to receive and detect the at least one light beam from the light emitting surface of each optical fiber, thereby obtaining at least one optical property.

Abstract: A micro-displacement measurement system having a picometer scale resolution and a measurement method. The measurement system comprises a probe module, a demodulation optical path module, a static lock-in amplification module, an upper computer module, and a micro-displacement drive module. The probe module comprises a measurement FBG sensor, a matching FBG sensor, a precision stainless steel needle tube, and an external support; the demodulation optical path module comprises an ASE broadband light source, a first circulator, a second circulator, and an InGaAs photodetector; the upper computer module comprises a data acquisition card and a computer; and the micro-displacement drive module comprises a piezoelectric ceramic nano-positioner, a piezoelectric ceramic driver, a three-dimensional precision micro-motion platform.

Abstract: The present disclosure provides a method for detecting light leakage of a screen, a method for detecting ambient light, and an apparatus for detecting ambient light. The method for detecting light leakage of a screen includes: acquiring display parameters of a screen, the display parameters including: a brightness value of the screen and grayscale values of respective pixel points within a preset display region of the screen; inputting the display parameters into a pre-trained neural network model, to process the display parameters using the neural network model, to obtain light leakage values corresponding to the respective pixel points; and obtaining a light leakage value of the screen based on the light leakage values corresponding to the respective pixel points. Based on the above technical solutions, the light leakage value of the screen can be accurately and reliably determined.