公开(公告)号：US3625619A

公开(公告)日：1971-12-07

申请号：US3625619D

申请日：1970-03-27

Applicant: AGA AB

Inventor： SCHOLDSTROM KARL OTTO RAGNAR

IPC: G01N21/41 ,  G01N21/46

CPC classification number: G01N21/41

Abstract: Modulated light containing components of two different wavelengths is transmitted over a path and the modulation phase difference at the receiving end of the path is determined. A common optical modulator is used for demodulating both of the received light components in order to minimize differences in phase between these two components.

公开(公告)号：US3656828A

公开(公告)日：1972-04-18

申请号：US3656828D

申请日：1969-12-17

Applicant: AGA AB

Inventor： SCHOLDSTROM KARL OTTO RAGNAR

IPC: F21K99/00 ,  F21S8/00 ,  G01S1/02 ,  G01S1/70 ,  G02B26/04 ,  G02B26/08 ,  G08G9/00 ,  G02B17/00

CPC classification number: G08G9/00 ,  G01S1/02 ,  G01S1/70 ,  G02B26/04 ,  G02B26/0816

Abstract: A pair of oppositely directed beams of light are rotated about an axis. The direction of the beams has a small deviation from a plane normal to the axis, whereby flashes of equal strength from both beams are produced in the normal plane at twice the frequency of revolution, thereby indicating the normal plane to a viewer. In similar manner, a line may be indicated by making a beam rotate about an axis having a small deviation from that of the beam.

Abstract translation: 一对相对定向的光束绕轴线旋转。 光束的方向与垂直于轴线的平面有很小的偏差，从而在正常平面上以两倍的旋转频率产生来自两个光束的相等强度的闪光，从而指示观察者的正常平面。