公开(公告)号：US3514183A

公开(公告)日：1970-05-26

申请号：US3514183D

申请日：1967-11-06

Applicant: IBM

Inventor： RABEDEAU MELBOURNE E

IPC: G02B26/02 ,  G02F1/28

CPC classification number: G02B26/02

公开(公告)号：US3510658A

公开(公告)日：1970-05-05

申请号：US3510658D

申请日：1967-11-06

Applicant: IBM

Inventor： RABEDEAU MELBOURNE E

IPC: G11B7/0033 ,  G11B7/09 ,  G11B7/24 ,  G11B11/105 ,  G01J1/36 ,  G01J1/20

CPC classification number: G11B7/0033 ,  G11B7/0938 ,  G11B7/24 ,  G11B11/10576 ,  G11B11/10584

公开(公告)号：US3556638A

公开(公告)日：1971-01-19

申请号：US3556638D

申请日：1968-06-05

Applicant: IBM

Inventor： BANKS WILLARD K ,  RABEDEAU MELBOURNE E

IPC: G02B26/02 ,  G02B26/08 ,  G02F1/34

CPC classification number: G02B26/02 ,  G02B26/0883

Abstract: A LIGHT DEFLECTOR COMPRISING TWO LIGHT TRANSPARENT MEMBERS HAVING ADJACENT SURFACES WHEREIN THE SECOND MEMBER IS MOVABLE INTO AND OUT OF OPTICAL CONTACT WITH THE FIRST. LIGHT BEING PASSED THROUGH THE FIRST MEMBER IS INTERCEPTED BY THE MEMBER''S SURFACE TO BE REFLECTED BY THE PRINCIPLE OF TOTAL INTERNAL REFLECTION WHEN THE SECOND MEMBER IS NOT IN CONTACT WITH THE FIRST. WITH THE SURFACES IN CONTACT, THE LIGHT WILL PASS ON INTO THE SECOND MEMBER AND BE REFLECTED ALONG A SEPARATE PATH FROM THE FIRST PATH. THIS INVENTION DEALS WITH MEANS FOR CONTROLLING THE POSITION OF THE SECOND MEMBER FOR REGULATING THE PATH OF THE BEAM.

公开(公告)号：US3590249A

公开(公告)日：1971-06-29

申请号：US3590249D

申请日：1968-10-02

Applicant: IBM

Inventor： RABEDEAU MELBOURNE E

IPC: G11B11/105 ,  G11C13/06 ,  H04B10/06 ,  H04B9/00

CPC classification number: H04B10/60 ,  G11B11/10515 ,  G11C13/06

Abstract: A read system for optically detecting data written on a memory element wherein a light beam is modulated by areas of the memory element and such modulation is detected for reading the data. The invention involves a parallel directed beam, not modulated by the data but utilized for subtracting background noise from the read beam.