公开(公告)号：DE2653900A1

公开(公告)日：1977-07-07

申请号：DE2653900

申请日：1976-11-27

Applicant: IBM

Inventor： BEASTROM RALPH EMIL ,  BOWEN ARLEN JOHN ,  KELLER RONALD JAMES ,  NUTT DAVID GEORGE

IPC: G06K7/10 ,  G06K7/14

Abstract: A document card reader including a row of light sources transmitting light through a corresponding series of column-like cavities within a pair of members between which a document card with punched openings therethrough may move and a convex lens placed so as to receive light transmitted through the document card openings and transmit the light from all of the openings to a photodetector positioned at substantially the focal point of the lens.

公开(公告)号：CH600440A5

公开(公告)日：1978-06-15

申请号：CH1580776

申请日：1976-12-16

Applicant: IBM

Inventor： BEASTROM RALPH EMIL ,  BOWEN ARLEN JOHN ,  KELLER RONALD JAMES ,  NUTT DAVID GEORGE

IPC: G06K7/10

Abstract: A document card reader including a row of light sources transmitting light through a corresponding series of column-like cavities within a pair of members between which a document card with punched openings therethrough may move and a convex lens placed so as to receive light transmitted through the document card openings and transmit the light from all of the openings to a photodetector positioned at substantially the focal point of the lens.