Laser Measurement Apparatus Having a Removable and Replaceable Beam Dump

    公开(公告)号:US20230228622A1

    公开(公告)日:2023-07-20

    申请号:US17576059

    申请日:2022-01-14

    CPC classification number: G01J1/4257 G01J1/0271 G01J1/0407 G01J1/0403

    Abstract: The present application discloses an apparatus configured to measure characteristics of high power beams of laser energy used in material processing. In one embodiment, the apparatus includes a housing having a first compartment and a second compartment separated from each other to reduce the transfer of thermal energy between them. Optical modules having optical sensors configured to measure characteristics of the high power beam are mounted in the first compartment. An optical window operative to allow a significant portion of the beam to propagate therethrough is mounted in an intermediate housing member separating the first and second compartments. A removable and replaceable beam dump configured to absorb most of the high power beam is positioned in the second compartment. The removability/replaceability of the beam dump enables operation of the apparatus without active cooling of the beam dump assembly, simplifying the apparatus and protecting the optical sensors in the first compartment.

    LENS FOR USE IN A DETECTOR
    45.
    发明申请

    公开(公告)号:US20230134884A1

    公开(公告)日:2023-05-04

    申请号:US17918454

    申请日:2021-04-19

    Abstract: A lens (200) for detecting light waves (110) is provided. The lens comprises a first part (210) configured to receive light waves, wherein the first part (210) has the form of a spherical cap of a first sphere with a first radius. The lens also comprises a second part (220) in the form of a spherical segment of a second sphere (220) with a second radius. The radius of the second sphere is equal to or larger than the radius of the first sphere, and the centers of the first and second spheres coincide in a point on the optical axis of the lens (200). In a base side that faces away from the first part (210), the second part (220) comprises a plurality of concentric sections 230), each having a first surface (230a) that faces away from the optical axis of the lens (200) and that has the form of a spherical zone of a third sphere with a center coinciding with the centers of the first and second spheres. The lens (200) is configured to focus light waves from different angles of incidence onto a common focal plane.

    OPTICAL LENS ASSEMBLY AND OPTICAL MEASUREMENT METHOD

    公开(公告)号:US20230124939A1

    公开(公告)日:2023-04-20

    申请号:US17959443

    申请日:2022-10-04

    Abstract: An optical lens assembly is adapted for receiving a light beam that is emitted by an object, and includes a lens unit and a sleeve unit. The lens unit includes a casing that has a light-incident side adapted for receiving the light beam. The sleeve unit surrounds the light-incident side of the casing, and defines a light-receiving space that is adapted for the light beam to pass through so that propagation of the light beam is unaffected by disturbance caused by movement of air. An optical measurement method includes steps of: a) providing a lens unit, a sleeve unit, and an object that is for emitting a light beam; and b) operating the lens unit so that the light beam is received by the lens unit.

    OPTICAL DEVICE ALLOWING THE ANGULAR EMISSION PATTERN OF A LIGHT SOURCE OF FINITE AREA TO BE RAPIDLY MEASURED

    公开(公告)号:US20230117589A1

    公开(公告)日:2023-04-20

    申请号:US17905223

    申请日:2021-02-25

    Applicant: ELDIM

    Inventor: Thierry Leroux

    Abstract: A device allowing the angular emission pattern of a source to be measured without mechanical movement comprises, in succession, along its optical axis: a first objective, called the Fourier objective, arranged to form a Fourier surface each point of which corresponds to one direction of observation of the object; a diffuser used in transmission and placed on the Fourier surface; a substance of optical density placed upstream of the diffuser and arranged to attenuate the light backscattered toward the Fourier objective and the areal source; and a video photometer located downstream of the plane of the diffuser and arranged to image the surface of the diffuser.

    Image sensor structure
    49.
    发明授权

    公开(公告)号:US11610928B2

    公开(公告)日:2023-03-21

    申请号:US17119909

    申请日:2020-12-11

    Applicant: Illumina, Inc.

    Abstract: An example image sensor structure includes an image layer. The image layer includes an array of light detectors disposed therein. A device stack is disposed over the image layer. An array of light guides is disposed in the device stack. Each light guide is associated with at least one light detector of the array of light detectors. A passivation stack is disposed over the device stack. The passivation stack includes a bottom surface in direct contact with a top surface of the light guides. An array of nanowells is disposed in a top layer of the passivation stack. Each nanowell is associated with a light guide of the array of light guides. A crosstalk blocking metal structure is disposed in the passivation stack. The crosstalk blocking metal structure reduces crosstalk within the passivation stack.

    Methods and devices for evaluating performance of a diode laser

    公开(公告)号:US11609176B2

    公开(公告)日:2023-03-21

    申请号:US17318608

    申请日:2021-05-12

    Abstract: Methods for evaluating performance a diode laser are provided. In embodiments, methods include receiving a laser beam profile of a diode laser, determining first, second and third laser beam widths at first, second and third laser intensities, respectively, for the laser beam profile, computing a first ratio between the second and third laser beam widths, computing a second ratio between the first and second laser beam widths, evaluating laser performance based on the first and second ratios, and outputting a determination regarding the suitability of the laser for use in a flow cytometry setting. Devices for practicing the subject methods are also provided, and include first and second stages configured to receive a diode laser and beam profiler, respectively. Aspects of the invention further include flow cytometers incorporating a diode laser that has been evaluated by the subject method.

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