Abstract:
A microscopy imaging system is disclosed that includes a light source system, a spectral shaper, a modulator system, an optics system, an optical detector and a processor. The light source system is for providing a first train of pulses and a second train of pulses. The spectral shaper is for spectrally modifying an optical property of at least some frequency components of the broadband range of frequency components such that the broadband range of frequency components is shaped producing a shaped first train of pulses to specifically probe a spectral feature of interest from a sample, and to reduce information from features that are not of interest from the sample. The modulator system is for modulating a property of at least one of the shaped first train of pulses and the second train of pulses at a modulation frequency. The optical detector is for detecting an integrated intensity of substantially all optical frequency components of a train of pulses of interest transmitted or reflected through the common focal volume. The processor is for detecting a modulation at the modulation frequency of the integrated intensity of substantially all of the optical frequency components of the train of pulses of interest due to the non-linear interaction of the shaped first train of pulses with the second train of pulses as modulated in the common focal volume, and for providing an output signal for a pixel of an image for the microscopy imaging system.
Abstract:
This invention discloses a laser induced breakdown spectroscopy (LIBS) apparatus based on a high repetition rate pulsed laser. The laser produces a train of laser pulses at a high repetition rate in the kHz or even higher range. When the laser beam hits the sample, it generates several thousands of micro-plasmas per second. Synchronized miniature CCD array optical spectrometer modules collect the LIBS signal from these micro-plasmas. By adjusting the integration time of the spectrometer to cover a plurality of periods of the laser pulse train, the spectrometer integrates the LIBS signal produced by this plurality of laser pulses. Hence the intensity of the obtained LIBS spectrum can be greatly improved to increase the signal-to-noise ratio (SNR) and lower the limit of detection (LOD). In addition, the influence of pulse to pulse variation of the laser is minimized since the obtained LIBS spectrum is the spectrum of a plurality of micro-plasmas produced by a plurality of laser pulses. The high repetition rate laser also makes it possible for fast scanning the laser beam over the sample surface such that an average spectrum of the sample is collected to overcome the sample non-uniformity issue or for performing spectral imaging of the sample by correlating the obtained LIBS spectrum with the position of the scanning laser beam.
Abstract:
A seed sorter system is operable to sort seeds based on one or more characteristics of the seeds. The system includes a seed loading station operable to isolate individual seeds from a plurality of seeds and load the isolated seeds into a seed tray, an imaging and analysis subsystem operable to collect image data of at least a top portion and a bottom portion of each of the seeds in the seed tray and determine one or more characteristics of each of the seeds, a seed off-load and sort station operable to remove the seeds from the seed tray and sort the seeds to desired receptacles based on the determined one or more characteristics of the seeds, and a seed transport operable to move the seed tray between the seed loading station, the imaging and analysis subsystem, and the seed off-load and sort station.
Abstract:
A biological optical measurement instrument includes a single temperature sensor that detects a radiation temperature from a plurality of light emitting elements that emit light of a predetermined wavelength, and an absorption coefficient correcting unit that corrects an absorption coefficient value of a notable substance inside the object on the basis of the radiation temperature detected by the temperature sensor, referring to data indicating a correspondence relationship between a temperature obtained in advance for each emitted light of the plurality of light emitting elements and an absorption coefficient value that varies according to the temperature.
Abstract:
A spectroscopy system includes an array of quantum cascade lasers (QCLs) that emits an array of non-coincident laser beams. A lens array coupled to the QCL array substantially collimates the laser beams, which propagate along parallel optical axes towards a sample. The beams remain substantially collimated over the lens array's working distance, but may diverge when propagating over longer distances. The collimated, parallel beams may be directed to/through the sample, which may be within a sample cell, flow cell, multipass spectroscopic absorption cell, or other suitable holder. Alternatively, the beams may be focused to a point on, near, or within the target using a telescope or other suitable optical element(s). When focused, however, the beams remain non-coincident; they simply intersect at the focal point. The target transmits, reflects, and/or scatters this incident light to a detector, which transduces the detected radiation into an electrical signal representative of the target's absorption or emission spectrum.
Abstract:
Systems and methods for extracting topographic information from inspected objects to identify defects in the inspected objects. A part to be inspected is illuminated with at least two different colors emitted from an illuminator providing a gradient of light consisting of the at least two different colors. A single color image of the illuminated part to be inspected is acquired, providing a color-coded topographic mapping of the part to be inspected due, at least in part, to the gradient of light. Topographic monochrome views of the part to be inspected may be generated from the single color image. Each view of the topographic monochrome views may enhance a different type of feature or defect present in the part to be inspected which can be analyzed and detected.
Abstract:
An optical system having an optical sensor with an ultra-short FP cavity, and a low-resolution optical interrogation system coupled to the optical sensor and operational to send light signals and receive light signals to and from the optical sensor is disclosed. The optical system may operate in a wavelength range including the visible and near-infrared range. Methods of interrogating optical sensors are provided, as are numerous other aspects.
Abstract:
A spectroscopy system and method includes illuminating a target with a wideband light pulse that includes an entire testing wavelength spectrum. The light pulse is transformed with a dispersive medium to introduce a frequency-based time delay to the light pulse after the light pulse has interacted with a target. The dispersed light pulse is converted to a time-domain electrical signal with a photodiode. The time-domain electrical signal is converted into a spectral profile of the target.
Abstract:
A color measuring apparatus includes a measurement assembly which includes at least one illumination assembly for applying substantially parallel illumination light to a measurement spot of a measurement object and a pick-up assembly for capturing the measurement light radiated back from the measurement spot in an observation direction and for converting the same into corresponding electrical signals. The illumination assembly includes at least two illumination subassemblies which illuminate the measurement spot from different illumination sub-directions near a first preset nominal illumination direction, each with preferably parallel illumination light. By the illumination from different illumination sub-directions slightly deviating from the nominal illumination direction, angular errors of the illumination assembly can be compensated for in a simple manner.
Abstract:
A portable spectrometer device includes an illumination source for directing at a sample, and a tapered light pipe (TLP) for capturing light interacting with the sample at a first focal ratio and for delivering the light at a second focal ratio lower than the first focal ratio. A linearly variable filter (LVF) separates the captured light into a spectrum of constituent wavelength signals; and a detector array, including a plurality of pixels, each of the plurality of pixels disposed to receive at least a portion of a plurality of the constituent wavelength signals provides a power reading for each constituent wavelength. Preferably, the TLP is lensed at one end, and recessed in a protective boot with stepped inner walls. The gap between the TLP and LVF is minimized to further enhance resolution and robustness.