System and method for molecule sensing using evanescent light coupling approach

    公开(公告)号:US09921164B2

    公开(公告)日:2018-03-20

    申请号:US15418350

    申请日:2017-01-27

    Inventor: Tao Lu

    Abstract: A system and a method for optical sensing of single molecule or molecules in various concentrations are provided. The optical sensor system comprises a first fiber, a second fiber, a light source and a detection device. The first fiber and the second fiber are fused together to form an optical coupler. The first fiber serves as the passageway for the analyte, while the second fiber serves as the waveguide for the light that will interact with the said analyte. One end of the second fiber is connected to the light source (e.g. laser), and the opposite end is connected to the detection device (e.g. spectrometer). The analyte is introduced into the first fiber through one of its ends, and is allowed to flow through inside the hollow core of the said first fiber. When light is delivered through the input end of the second fiber, the evanescent light is formed in the optical coupler and is allowed to interact with the analyte in the first fiber. One scenario in this analyte-light interaction results in, for example, the generation of Raman emission that is used as the probing signal. The spectrum of the Raman emission is analyzed by the detection device to determine the presence of target molecule.

    FOOD INTEGRITY PROBE HEAD
    87.
    发明申请

    公开(公告)号:US20170328770A1

    公开(公告)日:2017-11-16

    申请号:US15592274

    申请日:2017-05-11

    Abstract: A food integrity probe design comprising two illumination fiber rings, allowing for two different simultaneous measurements wherein the inner illumination ring generates a surface reflectance signal on the central detection fibers and the outer illumination ring allows for an additional interactance measurement, probing deeper into the sample than the surface reflectance alone while partially eliminating specular reflection, which reduces the signal quality, through the addition of a ring-shaped diffusor onto the inner illumination ring is disclosed.

    System and Method for Confocal Raman-Spectroscopic Measurements of Biological Samples

    公开(公告)号:US20170176320A1

    公开(公告)日:2017-06-22

    申请号:US15379546

    申请日:2016-12-15

    Abstract: The invention relates to a system (1) for confocal Raman-spectroscopic measurements, comprising at least the following components: a sample chamber (10), wherein said sample chamber (10) is configured to house a sample (2) in a closed chamber volume (12) of the sample chamber (10), an excitation light source (3), an objective lens (4), configured to focus excitation light (32) of the excitation light source (3) through a ceiling portion (11) of the sample chamber (10) in a focal volume (31) in the chamber volume (12) and to collect inelastically scattered light (33) stemming from the focal volume (31), a confocal detection arrangement (20), comprising means for a confocal detection (22, 23) of a Raman signal comprised in the inelastically scattered light (33) from the focal volume (31), and a detector (21) that is configured to detect and to record said Raman signal, wherein the distance (5) between the ceiling portion (11) of the sample chamber (10) and the focal volume (31) is greater than one millimetre during operation of the system (1).

Patent Agency Ranking