公开(公告)号：US3872348A

公开(公告)日：1975-03-18

申请号：US37064273

申请日：1973-06-18

Applicant: CROSFIELD ELECTRONICS LTD

Inventor： ASTLEY EDWARD T

IPC: H01J31/02 ,  B41B19/01 ,  B41J2/435 ,  G06K15/12 ,  G09G1/00 ,  G09G1/10 ,  H04N17/04 ,  H01J29/70

CPC classification number: B41B19/01 ,  G09G1/00 ,  G09G1/10

Abstract: To deflect a light spot over a grating until it reaches a predetermined grating line, the beam is initially given a consistent starting point by deflecting it until its intersection with a grating line, or auxiliary line preceding the grating, is sensed and using the detection of this intersection to position the beam a fraction of the grating pitch away from the grating line; the beam is then deflected over the required integral multiple of the grating pitch, leaving the beam between two grating lines, and the beam is then progressively deflected until its intersection with the required grating line is detected.

Abstract translation: 为了将光点偏转到光栅上直至其到达预定的光栅线，光束首先通过偏转来给出一致的起始点，直到其与感光栅之前的光栅线或辅助线相交，并且使用检测 该交叉点将光束的一部分光栅距离光栅线定位; 然后将光束偏转在光栅间距的所需整数倍上，将光束留在两个光栅线之间，然后光束逐渐偏转，直到检测到与所需光栅线的相交。

公开(公告)号：US3439176A

公开(公告)日：1969-04-15

申请号：US3439176D

申请日：1966-02-21

Applicant: CROSFIELD ELECTRONICS LTD

Inventor： ASTLEY EDWARD T ,  KING DANIEL L ,  GOLD DANIEL

IPC: B41F13/02 ,  B65H23/04 ,  G01N21/30

CPC classification number: B41F13/025 ,  B65H23/046

公开(公告)号：US3529521A

公开(公告)日：1970-09-22

申请号：US3529521D

申请日：1967-06-30

Applicant: CROSFIELD ELECTRONICS LTD

Inventor： ASTLEY EDWARD T

IPC: B41B17/10 ,  B41B19/01 ,  B41B27/28 ,  B41B19/00

CPC classification number: B41B17/10 ,  B41B19/01 ,  B41B27/28