公开(公告)号：DE1472145A1

公开(公告)日：1971-09-16

申请号：DE1472145

申请日：1965-09-17

Applicant: IBM

Inventor： BRASLAU NORMAN ,  AUDUBON HARDY WILTON

IPC: B41B21/28 ,  G02B17/00 ,  G09G3/04 ,  G02B7/18

Abstract: 1,103,249. Optical apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. Aug. 18, 1965 [Dec. 17, 1964], No. 35380/65. Heading G2J. Optical apparatus comprising a plurality of mirrors arranged to form multiple images on each mirror of an object by multiple reflections therebetween, is provided with means for reintroducing an emerging image to the system of mirrors to form further different multiple images on the mirrors by multiple reflections therebetween. In the embodiment of Fig. 1, two spherical concave mirrors 4, 6 of equal radius are arranged side by side to reflect alternately an image on to a third spherical, concave mirror 2 of the same radius. The centre of curvature of the mirror 2 lies between the mirrors 4, 6 while the centres of curvature of mirrors 4, 6 lie on the mirror 2. A light-source 8 is imaged adjacent the mirror 2 and this image is reflected by the mirror 4 to form an image on the mirror 2. Further alternate reflections occur at the mirrors 4, 6 after each reflection at the mirror 2 until an image is produced by the mirror 6 outside the area of the mirror 2. This image is arranged to coincide with a selected part of a character mask 32 on adjustment of either or both mirrors 4, 6. The means for reinserting the emerging image into the mirror system comprises a field lens 38 and a spherical mirror 40 which produce a real image of the selected character of the mask 32 adjacent the mirror 2. It follows that, after further multiple reflections between the mirrors, a second emerging image is formed adjacent the mirror 2, the position of which is independent of the position, of the character chosen on the mask 32. The character selection may be effected by means of an electro-optical deflector in combination with a flat mirror and an associated lens which replace one of the mirrors 4, 6.

公开(公告)号：DE1934455A1

公开(公告)日：1970-01-22

申请号：DE1934455

申请日：1969-07-08

Applicant: IBM

Inventor： BRASLAU NORMAN

IPC: G11C11/39 ,  H01L47/00 ,  H03K3/02 ,  G11C11/36

Abstract: 1,252,814. Bulk effect semi-conductor circuits. INTERNATIONAL BUSINESS MACHINES CORP. 8 April, 1969 [15 July, 1968], No. 17996/69. Heading H3T. [Also in Division G4] In apparatus including a body 10 of bulk effect material having a velocity field characteristic V(E) with sufficient negative differential mobility to satisfy the condition: where # is the average conductivity of the material, a voltage source B applies a D.C. electric field E b to the body which is less than the threshold field necessary to nucleate a high field domain in the body and a source of R.F. signals applies an R.F. field E R.F. to the body, the R.F. field having an angular frequency # such that # G