公开(公告)号：US3329474A

公开(公告)日：1967-07-04

申请号：US32248463

申请日：1963-11-08

Applicant: IBM

Inventor： HARRIS THOMAS J ,  EUGENE SHAPIRO

IPC: G02F1/31 ,  G11C13/04

CPC classification number: G02F1/31 ,  G11C13/047

公开(公告)号：US3312957A

公开(公告)日：1967-04-04

申请号：US31885963

申请日：1963-10-25

Applicant: IBM

Inventor： HAROLD FLEISHER ,  HARRIS THOMAS J ,  EUGENE SHAPIRO

IPC: G11C11/22 ,  G11C13/04

CPC classification number: G11C13/047 ,  G11C11/22

公开(公告)号：US3182574A

公开(公告)日：1965-05-11

申请号：US26300263

申请日：1963-03-05

Applicant: IBM

Inventor： HAROLD FLEISHER ,  HARRIS THOMAS J ,  EUGENE SHAPIRO

IPC: G02F1/29

CPC classification number: G02F1/29

公开(公告)号：US3262122A

公开(公告)日：1966-07-19

申请号：US27723363

申请日：1963-05-01

Applicant: IBM

Inventor： HAROLD FLEISHER ,  HARRIS THOMAS J ,  EUGENE SHAPIRO

IPC: B23K26/00 ,  B23K26/06 ,  B23K26/12 ,  G02F1/29 ,  G03G5/022 ,  G06K1/12 ,  G11B7/003 ,  G11B7/085 ,  G11B11/03 ,  G11B11/105 ,  H04N5/76 ,  H04N5/82

CPC classification number: H04N5/82 ,  B23K26/064 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  B23K26/0846 ,  B23K26/1423 ,  B23K26/361 ,  B23K2203/42 ,  B23K2203/50 ,  G02F1/29 ,  G03G5/022 ,  G06K1/126 ,  G11B7/003 ,  G11B7/085 ,  G11B11/03 ,  G11B11/10502 ,  H04N5/76 ,  Y10S101/37 ,  Y10S430/146

Abstract: 1,026,317. Lasers. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 28, 1964 [May 1, 1963], No. 17489/64. Heading H3B. [Also in Divisions G2 and G5] Information is recorded on a thermoplastic surface by using a laser beam to heat the surface and cause local deformations in the surface. In Fig. 1, the beam from a laser 16 is split by a half-silvered mirror 20 and part of the beam is focused by a lens 26 on to the tape record 10 to melt its surface and thereby erase any information previously recorded. The other part of the beam is reflected by a mirror 28 through a variable focus lens 34 and a fixed focus lens 36 on to the tape which has previously been electrically charged by a unit 30. The lens 34 is adapted to focus or defocus the beam under the control of an information source 37, and when the beam is focused the record is heated sufficiently to cause local deformation of the surface under the influence of the electrostatic charge and surface tension. The laser 16 may be pulsed or continuous wave and may use calcium fluoride doped with divalent dysprosium, calcium tungstate doped with trivalent neodymium, ruby, or a gas such as helium, neon, argon, krypton or xenon, or a semi-conductor gallium arsenide diode.