摘要:
A system for imaging high speed moving objects, for example, using a scanning beam and beam delivery optics with fast signal processing. It can allow for vocal fold imaging at up to or exceeding approximately 1000 frames per second with grayscale resolution as high as about 100 micrometers or higher and up to about a 12.4 mm square or larger viewing area. The invention can provide imaging of vocal fold vibration that correlates completely with a synchronously-acquired acoustic voice signal. This can enable physicians, voice therapists and research scientists to understand the consequences of abnormal laryngeal dynamics, rather than being limited to simply observing the dynamics. Further, the application of laser technology will allow for accurate measurements of dimension. This can objectify examination findings and treatment outcomes measurement, helping to overcome the serious limitations of current perceptual-based judgments.
摘要:
A system is disclosed for detecting a nonlinear coherent field induced in a sample. The system includes optics, a modulation system, and a detector system. The optics are for directing a first electromagnetic field at a first frequency ω1 and a second electromagnetic field at a second frequency ω2 toward a focal volume such that a difference frequency ω1–ω2 is resonant with a vibrational frequency of a sample in the focal volume. The modulation system is for modulating the difference frequency ω1–ω2 such that the difference frequency ω1–ω2 is tuned in and out of the vibrational frequency of the sample of at a modulation frequency. The detector system is for detecting an optical field that is generated through non-linear interaction of ω1 and ω2 and the sample responsive to the modulation frequency.
摘要:
A system is disclosed for detecting a nonlinear coherent field induced in a sample. The system includes optics, a modulation system, and a detector system. The optics are for directing a first electromagnetic field at a first frequency ω1 and a second electromagnetic field at a second frequency ω2 toward a focal volume such that a difference frequency ω1−ω2 is resonant with a vibrational frequency of a sample in the focal volume. The modulation system is for modulating the difference frequency ω1−ω2 such that the difference frequency ω1−ω2 is tuned in and out of the vibrational frequency of the sample at a modulation frequency. The detector system is for detecting an optical field that is generated through non-linear interaction of ω1 and ω2 and the sample responsive to the modulation frequency.
摘要:
A system is disclosed for detecting a signal field from a sample volume. The system includes a source system and an optical fiber system. The source system provides a first electromagnetic field at a first frequency and a second electromagnetic field at a second frequency that is different from the first frequency. The optical fiber system includes at least one optical fiber for guiding the first and second electromagnetic fields to the sample volume to generate coherent radiation characteristic of molecular vibrations by non-linear interaction of the first and second fields with the sample volume. The optical fiber system also receives the signal field resulting from the coherent radiation, and guides the signal field to a detector.
摘要:
A system is disclosed for detecting a signal field from a sample volume. The system includes a source system and an optical fiber system. The source system provides a first electromagnetic field at a first frequency and a second electromagnetic field at a second frequency that is different from the first frequency. The optical fiber system includes at least one optical fiber for guiding the first and second electromagnetic fields to the sample volume to generate coherent radiation characteristic of molecular vibrations by non-linear interaction of the first and second fields with the sample volume. The optical fiber system also receives the signal field resulting from the coherent radiation, and guides the signal field to a detector.