Abstract:
A method and apparatus for supplying light beams for integrated CARS and multiphoton microscopy, and an integrated CARS and multiphoton microscopy system and method. The method for supplying light beams for integrated CARS and multiphoton microscopy comprises the steps of generating a femtosecond pump beam; optionally generating a femtosecond Stokes beam using a portion of the pump beam; spectrally filtering the Stokes beam, the pump beam, or both such that the filtered beams are in a picosecond range or a femtosecond range depending on a desired microscopy operation mode; and supplying the filtered Stokes beam, pump beam, or both to a scanning microscope.
Abstract:
A system for near-infrared autofluorescence measurement of a subject, the system comprising: a light source configured to emit an excitation light at near-infrared; a medium configured for delivering the excitation light to the subject; and a processing section for processing an autofluorescence signal from the subject at near-infrared resulting from the excitation light impinging upon the subject so as to analyze the subject. For example, the processing section comprises a spectrometer for detecting the autofluorescence signal at near-infrared to analyze the subject. As another example, the processing section comprises an image sensor for generating an image based on the autofluorescence signal.
Abstract:
A method and system for performing tissue measurements. The system comprising: an endoscope for providing illumination light and for acquiring detected light from the tissue; and optical means for directing a portion of the detected light to a spectrometer and another portion of the detected light to an image capturing means.
Abstract:
Characterizing, identifying, or diagnosing the type and/or nature of a sample or a tissue such as an abnormal growth using a Raman spectrum includes analyzing distinct spectral subintervals within the Raman spectrum in two distinct wavelength ranges, such as FP and HW wavelength ranges, to identify a match with one or more reference markers in one or both wavelength ranges; and from the match characterizing, identifying, or diagnosing the type and/or nature of the sample or tissue. FP and HW Raman spectra can be detected or acquired simultaneously using a single diffraction grating.
Abstract:
A probe head for a diagnostic instrument using Raman spectroscopy for tissue measurements, the probe head comprising; a transmission optical fiber, a plurality of collection optical fibers, and a lens to transmit light from the transmission optical fiber to a test site, wherein the ends of the collection optical fibers are beveled or angled. The beveled surfaces can face towards or away from the end of the transmission fiber. Optical elements are used to gather and filter light scattered from tissue, and analysed to identify abnormal tissue.
Abstract:
A method and system for obtaining biomedical data for diagnosis purposes, the method comprising: irradiating a tissue sample with a source of radiation;receiving a spectra collected from the tissue sample as a result of irradiation of the tissue sample from a spectrograph; delivering radiation to the sample and collecting and returning the spectra to the spectrograph via a pressure sensitive probe; measuring the pressure exerted by the probe on the tissue sample using a pressure sensor; adjusting the pressure to be at a predetermined value when the spectra is collected using a pressure adjustment module.
Abstract:
A diagnostic instrument comprises a monochromatic light source, transmission means to transmit light from the light source to a test site, collection means to transmit scattered light from the test site, and spectral analysis apparatus to receive light from the collection means, the spectral analysis apparatus comprising a diffraction grating having a first grating element and a second grating element, wherein the first grating element diffracts light within a first wavelength range and the second grating element diffracts light within a second wavelength range, the spectral analysis apparatus further comprising a light-sensing apparatus, the first grating element arranged to diffract light onto a first area of the light-sensing apparatus and the second grating element arranged to diffract light onto a second area of the light-sensing apparatus.
Abstract:
The invention provides a probe (1) for measuring spectra of a target (21) within a bio-matter (2), comprising an optical structure (11) having a lens portion (111), and a communication line (12) conjoined to the optical structure (11). The optical structure (11) of the probe (1) has its exposed end tapered for forming the lens portion (111) that converges light incoming from the communication line (12) towards the target (21), and converges scattered light incoming from the target (21) towards the communication line (12). A system (3) that incorporates the probe (1), and a method of using the system (3), are further provided.
Abstract:
A stimulated Raman scattering tomography system includes means for generating a first input light beam, means for generating a second input light beam, an objective, a condenser and a detector. The first input light beam is phase-modulated while the second input light beam is amplitude-modulated. The objective is configured to direct the first and second input light beams onto a sample. The condenser is configured to collect an output light beam from the sample. The is detector configured to detect at least a portion of the output light beam corresponding to the first input light beam. The system further includes means for forming a depth-resolved image of the sample from the detected portion of the output light beam.
Abstract:
Disclosed is a lock-in detection free Raman imaging method of determining a stimulated Raman scattering (SRS) signal. The method comprises receiving imaging sensor data representative of a line-scan SRS signal with first and second scattering states; calculating a first scattering value based on a difference between a first intensity value of the imaging sensor data corresponding to the first scattering state and a second intensity value of the imaging sensor data corresponding to the second scattering state; and determining the line-scan SRS signal based on the calculated first scattering value.