Devices and methods for determining a level of FFI in a lens tissue

    公开(公告)号:US12109046B2

    公开(公告)日:2024-10-08

    申请号:US17336419

    申请日:2021-06-02

    Abstract: A method is provided that includes discriminating an autofluorescence (AF) response of a lens tissue of an eye due to a current level of 2-(2-furoyl)-4(5)-furanyl-1H-imidazole (FFI) in the lens tissue by interrogating a lens tissue of an eye along a visual axis of the eye by activating an illuminator for a select time to produce interrogating irradiation having a peak wavelength of 425 nm to 460 nm, the illuminator comprising at least one light source and a focal lens positioned with respect to the light source. The method also includes obtaining at least one image of the autofluorescence response of the lens tissue from a detector, the detector including a digital camera unit, analyzing the at least one image to determine a total autofluorescence index of the lens tissue, and determining a current level of FFI in the lens tissue based, at least in part, on the total autofluorescence index.

    MEASUREMENT OF DISSOLVED OXYGEN USING OPTICAL RADIATION INDUCED LUMINESCENCE

    公开(公告)号:US20240192130A1

    公开(公告)日:2024-06-13

    申请号:US18222893

    申请日:2023-07-17

    Abstract: Methods and apparatus for analyzing optical measurements to determine whether a liquid includes dissolved oxygen, to determine a predicted concentration of the dissolved oxygen in the liquid, and/or to determine additional or alternative feature(s) related to dissolved oxygen in the liquid. An optical source can be controlled to emit optical radiation into a container that contains the liquid. The optical source can be located outside of the container, and the optical radiation includes (e.g., is restricted to) radiation that conforms to a dissolved oxygen absorption band. The optical radiation can be pulsed or can be periodically intensity modulated. A photodetector, located outside of the container but in optical communication with the interior of the container, can generate the optical measurements used in the analysis.

    Virus detection system
    9.
    发明授权

    公开(公告)号:US11891671B1

    公开(公告)日:2024-02-06

    申请号:US17210832

    申请日:2021-03-24

    Applicant: A9.com, Inc.

    Abstract: Systems for testing for a target virus include an analysis device and a sample cartridge. A system for detecting a target virus includes a cartridge and an analysis device. A biological sample is inserted into the cartridge. The cartridge includes reagents and other liquids for processing the biological sample. The cartridge is inserted into the analysis device. The analysis device interacts with the cartridge to complete testing of the biological sample for the presence of the target virus.

    OPTICAL SENSOR FOR REMOTE TEMPERATURE MEASUREMENTS

    公开(公告)号:US20230395408A1

    公开(公告)日:2023-12-07

    申请号:US18321432

    申请日:2023-05-22

    Abstract: Aspects of the present disclosure provide a sensor for remote temperature measurement. For example, the sensor can include a light source configured to form an illumination beam, focusing optics configured to direct the illumination beam from the light source onto a semiconductor sample at an illuminated spot thereof, for exciting bandgap photoluminescence (PL) light in the semiconductor sample, collection optics configured to collect the bandgap PL light excited from the semiconductor sample, at least one optical detector configured to measure spectral intensities of the bandgap PL light in a vicinity of a semiconductor bandgap wavelength of the semiconductor sample, and transmission optics configured to transmit the bandgap PL light from the collection optics to the at least one optical detector.

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