Abstract:
Provided are an imaging unit 104 that uses a light emitted from a second beam splitter 202 of a microscope 2 that can use an exciting light and an observation light, which is a light including a wavelength other than that of the exciting light, as a light source by switching there between and is provided with the second beam splitter 202 to image images of the same observation region of the microscope 2 in situations where the exciting light and the observation light are used as the light source and an output unit 106 that overlaps, synthesizes, and outputs the images imaged by the imaging unit 104 respectively using the exciting light and the observation light as the light source.
Abstract:
The invention provides a method for chemical signature resolved detection of a concealed object within a system. The method includes irradiating the system at a plurality of positions with aplurality of electromagnetic radiation of specific wavelength; capturing a certain component of the scattered electromagnetic radiation from the object at a plurality of locations along various 3D planes around the system; obtaining a plurality of profiles from the captured component of the scattered electromagnetic radiation; filtering the profiles to obtain a chemical signature specific to the object; and resolving the chemical signatures to detect the concealed object, wherein, the step of detection includes determination of the shape, size and location of the object.
Abstract:
The present disclosure provides for a Raman probes and methods of imaging including a Raman probe. The Raman probes include a Raman detection system configured to illuminate an area of a subject or a sample with a light source and to receive Raman scattered light energy from the area. The Raman probe can include a proximity sensor system and a fluorescent imaging system. A method of imaging introduces a Raman probe to a subject. Fluorescent light is detected from an area of the subject, which guides the Raman probe to the area. The Raman probe is positioned at a target distance from the area using the proximity sensor system, and by exposing the area to a light beam from the Raman detection system. The light beam, Raman scattered light energy, is scattered by a Raman agent associated with the area. Raman scattered light is detected using the Raman imaging device.
Abstract:
The invention provides methods and apparatus comprising a multi-wavelength laser source that uses a single unfocused pulse of a low intensity but high power laser over a large sample area to collect Raman scattered collimated light, which is then Rayleigh filtered and focused using a singlet lens into a stacked fiber bundle connected to a customized spectrograph, which separates the individual spectra from the scattered wavelengths using a hybrid diffraction grating for collection onto spectra-specific sections of an array photodetector to measure spectral intensity and thereby identify one or more compounds in the sample.
Abstract:
A spectrograph as disclosed includes a housing, wherein a wall of the housing includes first, second and third openings, an entrance slit located at the first opening and configured to direct light along a first light path portion in the interior of the housing, a dispersive element located at the second opening and configured to receive light from the entrance slit along the first light path portion and direct light along a second light path portion in the interior of the housing, a detector located at the third opening and configured to receive light from the dispersive element along the second light path portion. The detector can include first and second groups of light-sensitive regions. A cover can be positioned to separate the first group of light-sensitive regions from the light path, the second group of light-sensitive regions being exposed to the light path.
Abstract:
A side-looking optical probe for a Raman spectroscopy system is provided. The probe includes: a base for mounting the probe to an optical assembly of the system; and a prism mounted to the base, the prism configured for receiving signal light from a sample and providing the signal light to the system. A method of fabrication and a spectrometer are provided.
Abstract:
A novel device, method and systems disclosed managing the thermal challenges of LIBS laser components and a spectrometer in a handheld structure as well the use of simplified light signal collection which includes a bare fiber optic to collect the emitted light in close proximity to (or in contact with) the test material. In one example embodiment of the handheld LIBS device, a burst pulse frequency is 4 kHz is used resulting in a time between pulses of about 250 μs which is a factor of 10 above that of other devices in the prior art. In a related embodiment, an active Q-switched laser module is used along with a compact spectrometer module using a transmission grating to improve LIBS measurement while substantially reducing the size of the handheld analyzer.
Abstract:
A first location comprising an unknown material may be scanned using SWIR hyperspectral imaging in a dual polarization configuration. Surveying may also be applied to thereby determine whether or not a human is present. This surveying may be achieved my assessing LWIR data, data acquired from motion sensors, and combinations thereof. If no human is present, a second location may be interrogated using Raman spectroscopic techniques to thereby obtain a Raman data set representative of the region of interest. This Raman data set may be assessed to associate an unknown material with a known material. This assessment may be achieved by comparing the Raman data set to one or more reference data sets in a reference database, where each reference data set is associated with a known material.
Abstract:
Systems, methods, and apparatuses of elastic light scattering spectroscopy and low-coherence enhanced backscattering spectroscopy are described here. An apparatus couple-able to a light source and a target object, to facilitate light transmission between the light source and the target object, the apparatus comprises: a probe to emit incident light that is partially coherent obtained from the light source onto the target object and to receive interacted light, the interacted light to be backscattered light from illumination of the incident light on the target object, the probe comprising: a delivery channel having at least one delivery optical fiber with a distal end portion couple-able to the light source and a proximal end portion suited to couple the incident light to the target object, a collection channel having a first collection optical fiber suited to collect substantially co-polarized backscattered light and a second collection optical fiber suited to collect substantially cross-polarized backscattered light.
Abstract:
A light guide may include a light stop part that is formed at a first end of an optical fiber, the light stop part stopping a light that is incident at a second end of the optical fiber and is transmitted through the optical fiber, and a slit part that is formed in the light stop part, the slit part being configured to pass the light that is incident at the second end of the optical fiber and is transmitted through the optical fiber.