公开(公告)号：WO2002059643A2

公开(公告)日：2002-08-01

申请号：PCT/CA2002/000076

申请日：2002-01-23

Applicant: OTI OPHTHALMIC TECHNOLOGIES INC.

Inventor： DUNNE, Shane ,  CHARLES, Steven

IPC: G01S15/89

CPC classification number: G02B26/101 ,  A61B5/0062 ,  A61B5/0064 ,  A61B5/0066 ,  A61B8/4281 ,  A61B8/4461 ,  A61B8/483 ,  B06B1/04 ,  G01S7/521 ,  G01S15/8947 ,  G02B7/1821 ,  G10K11/004 ,  G10K11/355

Abstract: A scanning device, typically ultrasonic, can make a volumetric scan of a conical scanning field. A transducer having a permanent magnet at its back end is gimbal mounted in a housing. Behind the permanent magnet is a hemispheric electromagnet coil assembly having at least two wound electromagnet coils. The coils are energized in turn with an alternating current signal, with the signal applied to any coil being out of phase with the signal applied to any other coil by 180°/n, where n is the number of coils in the hemispheric electromagnet coil assembly. Volumetric scanning is possible by periodically modulating the magnitude or frequency of the signals applied to the coils.

Abstract translation: 扫描装置（通常为超声波）可以对锥形扫描场进行体积扫描。 在其后端具有永磁体的换能器被安装在壳体中。 在永磁体后面是具有至少两个缠绕的电磁体线圈的半球形电磁体线圈组件。 线圈通过交流信号依次通电，施加于任何线圈的信号与施加于任何其他线圈的信号相位相差180°/ n，其中n是半球形电磁线圈组件中线圈的数量 。 通过定期调节施加到线圈的信号的幅度或频率，可以进行体积扫描。