公开(公告)号：DE2111438A1

公开(公告)日：1971-09-23

申请号：DE2111438

申请日：1971-03-10

Applicant: THOMSON CSF

Inventor： CHARLES DANIEL

IPC: H01J31/12 ,  H01J29/02

Abstract: The present invention relates to a cathode-ray tube designed for point display.

公开(公告)号：DE2517178A1

公开(公告)日：1975-10-30

申请号：DE2517178

申请日：1975-04-18

Applicant: THOMSON CSF

Inventor： CHARLES DANIEL ,  GUYOT LUCIEN ,  REBOUL JEAN PHILIPPE ,  MOIROUD GUY

IPC: G01S7/52 ,  G01H3/12 ,  G01S15/89 ,  H01J29/45 ,  H01J31/495 ,  G03X

Abstract: A target for ultrasonic camera comprising, applied to a substrate, a pyroelectric retina covered, in the present example, with a layer which absorbs incident ultrasonic waves; the temperature rise due to said absorption produces in the retina a charge relief read out by means which depend upon the selected device, for example an electron beam as in the case of the known pyroelectric targets.