Abstract:
The present invention provides apparatuses and methods for sample analysis, such as tissue analysis, that integrate high wavenumber (HW) Raman spectroscopy for chemical composition analysis and optical coherence tomography (OCT) to provide depth and morphological information. The invention also provides side-viewing optical probes that are based on a single double clad optical fiber for performing the combined HW Raman spectroscopy and OCT. Intravascular catheter embodiments and related vascular diagnostic methods are also provided.
Abstract:
A terahertz spectrometer includes: a terahertz-wave generating element; an elliptical mirror; an optical lens configured to apply a terahertz wave generated by the terahertz-wave generating element, obliquely to a focusing plane of a first focus of the elliptical mirror; and a terahertz-wave detecting element arranged at a second focus of the elliptical mirror.
Abstract:
A sensor and method for remotely determining a presence of a particular substance based on spectral data of the particular substance is disclosed. The sensor includes a sampling module configured to detect radiation from a particular substance using an interferometer, wherein the sampling module includes a control module that is configured to guide and measure spacing of samples taken by the sampling module; a focal plane module configured to detect and convert an interference pattern produced by the interferometer into a series of digital samples; a reference spectra modification module configured to modify reference spectra by modifying according to the measured spacing of samples and an instrument line shape of the sampling module; an estimation module configured to receive the converted series of digital samples and transform the non-uniformly spaced digital samples into frequency space using band centers determined from reference spectra as modified by the instrument line shape of the sampling module; a comparison module configured to compare the transformed digital samples against a database of known chemical signatures; and a determination module configured to determine the presence of the particular substance based on the results of the comparison.
Abstract:
A color analysis system includes a plurality of light sources configured to illuminate a test patch. A sensor is configured to receive light from the plurality of light sources reflected from the test patch. A controller is configured to determine the color of the test patch in response to light received by the sensor reflected from the first light source, and adjust the color determination in response to light received by the sensor reflected from the first and second light sources.
Abstract:
A wavelength detecting apparatus capable of detecting the main wavelength of the light coming into an image capture apparatus and a focus detecting apparatus using the same are disclosed. The wavelength detecting apparatus may include a spectral unit which separates the incoming light according to the respective wavelengths, and may focus the separated light onto a sensor. The main wavelength can be determined based on the wavelength distribution sensed by the sensor. The determined wavelength can be used to further determine amount of adjustment to be made to the defocus amount to compensate for the chromatic aberration associated with the wavelength of the light illuminating the source.
Abstract:
A scanner device for measuring the color properties of a measured object pixel by pixel has a support surface for the measured object, a color measuring head, a drive unit for moving the color measuring head above the support surface in at least one dimension thereof and for adjusting the height of the color measuring head in the direction perpendicular to the support surface, as well as a measurement and drive control unit which activates the drive unit and co-operates with the color measuring head. It is also equipped with an electronic distance control system which adjusts the distance of the color measuring head above the measurement point in the direction perpendicular to the support surface to a desired measuring distance for every measurement point by means of the drive unit. The electronic distance control system works with measurement values generated by the color measuring head and distance values computed from them. The scanner device is suitable for running high-precision measurements on even the smallest measurement fields without contact and no separate measurement sensor is needed for the distance control system.
Abstract:
In apparatuses and methods for adjusting a distance to an object, or examining an object, by using terahertz radiation, a sensor portion and a distance changing portion are used. The sensor portion includes a generator for generating terahertz radiation, a transmission line for transmitting the terahertz radiation, and a detector for detecting the terahertz radiation transmitted through the transmission line. The distance changing portion is configured to change the distance between the object and the sensor portion. The distance is adjusted based on information of the terahertz radiation detected by the detector. The object is examined based on the information of the terahertz radiation detected by the detector, after the distance is adjusted based on the information of the terahertz radiation detected by the detector. Under a condition of the adjusted distance, leaking electromagnetic field of the terahertz radiation transmitted through the transmission line interacts with the object.
Abstract:
An optical microscope applies laser light to a sample through the an objective lens, detects reflected light reflected by the sample through the objective lens, changes a focal position of the laser light in an optical axis direction, extracts a focal position for spectrum measurement based on a detection result of the reflected light when the focal position of the laser light is changed, adjusts the focal position to coincide with the extracted focal position, separates outgoing light exiting from the sample by application of the laser light with the adjusted focal position from the laser light, and measures a spectrum of the outgoing light separated from the laser light with a spectroscope.
Abstract:
A miniaturized spectrometer/spectrophotometer system and methods are disclosed. A probe tip including one or more light sources and a plurality of light receivers is provided. A first spectrometer system receives light from a first set of the plurality of light receivers. A second spectrometer system receives light from a second set of the plurality of light receivers. A processor, wherein the processor receives data generated by the first spectrometer system and the second spectrometer system, wherein an optical measurement of a sample under test is produced based on the data generated by the first and second spectrometer systems.
Abstract:
An optical characteristic measuring apparatus of the invention is configured in such a manner that a specular reflection light component in reflection light from an object to be measured is received, and shake of the apparatus is detected based on the amount of the received light. The optical characteristic measuring apparatus having the above arrangement enables to precisely measure an optical characteristic of the object to be measured, without the need of providing a mechanical switch or a like device, and without depending on the shape of the object to be measured.