Vibration measurement device
    5.
    发明授权

    公开(公告)号:US12111266B2

    公开(公告)日:2024-10-08

    申请号:US17044571

    申请日:2018-12-13

    Abstract: A vibration measurement device 10 includes an excitation unit (signal generator 11 and vibrator 12) for exciting an elastic wave to an inspection target S, an illumination unit (wavelength stabilized laser beam source 13 and illumination light lens 14) for performing stroboscopic illumination to a measurement region of a surface of the inspection target S using a wavelength stabilized laser beam source 13, a displacement measurement unit (speckle-sharing interferometer 15) for collectively measuring a displacement of each point of the measurement region in the back-and-forth direction by speckle interferometry or speckle-sharing interferometer. By using the wavelength stabilized laser beam source 13, an interference image can be obtained even when the inspection target S has large surface irregularities.

    Fluorescence-Detected Mid-Infrared Photothermal Microscopy

    公开(公告)号:US20240328949A1

    公开(公告)日:2024-10-03

    申请号:US18286320

    申请日:2022-04-12

    Abstract: A method of selectively photothermally heating a sample in a fluorescence-detected mid-infrared photothermal microscopy is disclosed which includes energizing a sample with one or more modulated infrared (IR) beams sourced by a multichannel laser array, concurrently continuously illuminating the sample with a probe beam, thereby generating a fluorescence response signal, capturing the fluorescence response signal, processing the captured modulated fluorescence response signal into two IR absorption spectra corresponding to chemical properties of two components in the sample by scanning over each channel of the multichannel laser array, generating a binary mask associated with the two spectra, establishing a cost function based on the generated binary mask, optimizing the cost function by optimizing the binary mask, and selectively energizing channels of the multichannel laser array based on the optimized binary mask thereby maximizing discrimination between the two components.

    OPTICAL DEVICE, SPECTROSCOPIC DEVICE, AND SPECTROSCOPIC METHOD

    公开(公告)号:US20240319082A1

    公开(公告)日:2024-09-26

    申请号:US18611916

    申请日:2024-03-21

    Inventor: Kohei YAMADA

    CPC classification number: G01N21/31 G01B11/02 G01N2201/06113 G01N2201/0636

    Abstract: An optical device includes: an analysis optical system; and a length measurement optical system. The analysis optical system includes a moving mirror configured to reflect analysis light to add a first modulation signal to the analysis light, a gas cell with a gas that absorbs light of a predetermined wavelength sealed therein and configured to add a light absorption signal to the analysis light, and a first light receiving element configured to receive the analysis light including a sample-derived signal, the first modulation signal, and the light absorption signal. The length measurement optical system includes a second light source and obtains a displacement signal corresponding to a position of the moving mirror using laser light.

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