公开(公告)号：US20190235230A1

公开(公告)日：2019-08-01

申请号：US16259017

申请日：2019-01-28

Applicant: The Governors of the University of Alberta

Inventor： Roger ZEMP ,  Zhenhao LI ,  Afshin Kashani ILKHECHI

IPC: G02B26/08 ,  B81B3/00 ,  B81B7/02

CPC classification number: G02B26/0833 ,  B81B3/0083 ,  B81B3/0086 ,  B81B7/02 ,  B81B2201/042 ,  B81B2203/0127 ,  B81B2203/0315 ,  B81B2203/04

Abstract: An optical system has a first electrode, and an optical element suspended above the first electrode. The optical element is flexible and comprises a second electrode. An optical element support rigidly supports an outer perimeter of the optical element above the first electrode. A voltage source applies a potential difference between the first electrode and the second electrode, the potential difference causing the optical element to flex and adjust a focal zone of the optical element. An optical source generates a beam. A lens focuses the beam to a lens focal zone in which the beam has a beam width, the beam at the beam width being incident on the optical element.

公开(公告)号：US20200069289A1

公开(公告)日：2020-03-05

申请号：US16122825

申请日：2018-09-05

Applicant: The Governors of the University of Alberta

Inventor： Roger ZEMP ,  Tarek KADDOURA ,  David EGOLF

IPC: A61B8/00 ,  G01N29/34 ,  G01S15/89

Abstract: An ultrasound imaging system for imaging a sample has an array of ultrasound transducers, a transmitter for driving the array of ultrasound transducers, a receiver that receives ultrasonic reflections from the sample, and a processor that generates an image of the sample based on a set of sub-image capture events, each sub-image capture event comprising received ultrasonic reflections. For each sub-image capture event, the transmitter transmits a sequence of transmit events from the ultrasound transducers. Each transmit event comprises a plurality of distinct waveforms directed toward separate focal zones on the sample. The sequence of transmit events comprises a sequence of distinct waveforms directed toward each focal zone. The cross-correlation level of the distinct waveforms in each transmit event is low, and the sequence of distinct waveforms is complementary.

公开(公告)号：US20180164418A1

公开(公告)日：2018-06-14

申请号：US15792422

申请日：2017-10-24

Applicant: The Governors of the University of Alberta

Inventor： Roger ZEMP ,  Christopher CEROICI

IPC: G01S7/52 ,  A61B8/00 ,  B06B1/06 ,  A61B8/08

CPC classification number: G01S7/52025 ,  A61B8/4477 ,  A61B8/4488 ,  A61B8/4494 ,  A61B8/5207 ,  B06B1/0207 ,  B06B1/0292 ,  B06B1/0622 ,  B06B1/0662 ,  G01S7/5202 ,  G01S7/52046 ,  G01S7/52079 ,  G01S7/52085 ,  G01S15/8925 ,  G01S15/8993 ,  G01S15/8997

Abstract: A method of ultrasonically imaging an object includes providing a 2D array of bias-sensitive ultrasound transducer elements. Each ultrasound transducer element has first and second electrodes on first and second sides of the ultrasound transducer connected in plural first and second electrode strips. The plural first electrode strips are oriented at an angle to the plural second electrode strips. A biasing pattern is applied to a plurality of the second electrode strips and generating a series of transmit events in one or more first electrode strips. Return pulses are detected by measuring received signals from biased second electrode strips. For the series of transmit events, the second electrode strips are biased according to sequential biasing patterns of voltages that correspond to rows or columns of an invertible matrix. The measured received signals are processed to generate an image of the object.