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    • 3. 发明申请
    • POSITIONING SYSTEM AND METHOD
    • WO2023067344A1
    • 2023-04-27
    • PCT/GB2022/052676
    • 2022-10-20
    • FOCAL POINT POSITIONING LTD.
    • FARAGHER, RamseyCROCKETT, Robert MarkDUFFETT-SMITH, Peter
    • G01S19/22G01S19/26G01S19/29G01S19/47
    • A method, performed in a positioning system, is disclosed. The method comprises: providing a local signal; receiving, at a receiver, a signal from a remote source in a first direction that is a straight line direction from the remote source to the receiver; measuring or assuming a movement of the receiver at a first rate; generating a motion-compensated correlation signal at a second rate that is lower than the first rate, wherein providing the motion-compensated correlation signal comprises correlating the local signal with the received signal and providing motion compensation of at least one of the local signal, the received signal, and the result of the correlation, based on the measured or assumed movement of the receiver in the first direction; obtaining, from the measured or assumed movement of the receiver, a first data set at the first rate that is indicative of the frequency shift or the change in the unambiguous phase of the received signal caused by the relative movement between the receiver and the remote source in the first direction; obtaining, from the motion- compensated correlation signal, a second data set at the second rate that is indicative of the frequency shift or the change in the unambiguous phase of the received signal caused by the relative movement between the receiver and the remote source in the first direction; and generating a processing output at a processing rate that is higher than the second rate based on the first data set and the second data set, whereby the processing output is indicative of the frequency shift or the change in the unambiguous phase of the received signal caused by the relative movement between the receiver and the remote source in the first direction. A corresponding position system is also disclosed.
    • 10. 发明申请
    • IMPROVED NAVIGATION FOR ELECTRON MICROSCOPY
    • WO2023002226A1
    • 2023-01-26
    • PCT/GB2022/051946
    • 2022-07-25
    • OXFORD INSTRUMENTS NANOTECHNOLOGY TOOLS LIMITED
    • STATHAM, PeterPINARD, Philippe
    • H01J37/22H01J37/26H01J37/28G01N23/2252
    • A method for analyzing a specimen in a microscope is described. The method comprises: acquiring a series of compound image frames using a first detector and a second detector, different from the first detector and displaying the series of compound image frames in real-time on a visual display, wherein the visual display is updated to show each compound image frame in sequence. Acquiring a compound image frame comprises: causing a charged particle beam to traverse a region of a specimen, the region corresponding to a configured field of view of the microscope, wherein: when a mode parameter has a first value, the traversal of the beam is along a first traversal path on the region and is according to a first set of traversal conditions, and when the mode parameter has a second value, the traversal of the beam is along a second traversal path on the region and is according to a second set of traversal conditions, wherein a first total time required for the beam to traverse the entire first traversal path according to a first set of traversal conditions is less than a second total time required for the beam to traverse the entire second traversal path according to the second set of traversal conditions; monitoring a first set of resulting particles generated within the specimen at a first plurality of locations within the region using the first detector so as to obtain a first image frame, the first image frame comprising a plurality of pixels corresponding to, and having values derived from the monitored particles generated at, the first plurality of locations, monitoring a second set of resulting particles generated within the specimen at a second plurality of locations within the region using the second detector, so as to obtain a second image frame, the second image frame comprising a plurality of pixels corresponding to, and having respective sets of values derived from the monitored particles generated at, the second plurality of locations, and combining the first image frame and the second image frame so as to produce the compound image frame, such that the compound image frame provides data derived from particles generated at the first and second pluralities of locations within the region and monitored by each of the first detector and the second detector.