公开(公告)号：JPH08322839A

公开(公告)日：1996-12-10

申请号：JP28439395

申请日：1995-10-06

Applicant: ADVANCED TECH LAB

Inventor： MIHAIRU SUTAROSUTA ,  DEIBITSUDO RAUNDOHIRU ,  DEIBITSUDO RUSUTO ,  KURIFUOODO AARU KOORII

IPC: G01B17/00 ,  A61B8/00 ,  G01B17/06 ,  G01N29/06 ,  G01S7/52 ,  G01S15/89

Abstract: PROBLEM TO BE SOLVED: To prevent generation of false image without decreasing frame speed by transmitting along direction of a first and a second beams locating at the two transverse ends of an image field, and then transmitting along beam direction adjacent to the inner side of the transverse direction of the first and the second beams to continuously scan the image field. SOLUTION: Timing of converter array 30 is controlled by a emitter-receiver controller 60, scanning sequence is started by scanning in the order of beam direction 1 and beam direction 2 of two beams locating at two sides of a center line 12 of a sector 10. After scanning the beam direction 2 at right side of the sector, the beam direction 3 at left side of the beam 1 is scanned, and continuously, beam direction 4 at right side of the beam 2 is scanned. The scanning sequence moves from the center of the sector toward the outside of the transverse direction and goes ahead from one side to other side of the sector and returns back. The each beam direction is equally scanned with 2PR1 intervals from a spaced adjacency passing through the whole image.