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公开(公告)号:WO1981002634A1
公开(公告)日:1981-09-17
申请号:PCT/GB1981000040
申请日:1981-03-11
Applicant: NAT RES DEV CORP , SASAKI I , PAYNE D , ADAMS M
Inventor: NAT RES DEV CORP
IPC: G01N21/41
CPC classification number: G01N21/412
Abstract: A method of sensing the optical deflection function of an approximately cylindrical object, such as an optical fibre preform, comprises illuminating the object with collimated light; focusing the transmitted light so that in the focal plane the distance of the light from the optical axis is linearly proportional to the angle through which light has been deviated by the object; optically modulating the focused light so that a property of the light varies as a function of said distance, and calculating the deflection function from the modulated light. The modulations may be spatial or temporal. The refractive index profile can also be calculated.
Abstract translation: 感测诸如光纤预制件的大致圆柱形物体的光学偏转函数的方法包括用准直光照射物体; 聚焦透射光,使得在焦平面中,光从光轴的距离与光被物体偏离的角度成线性比例; 对所聚焦的光进行光学调制,使得光的特性根据所述距离而变化,并从调制光计算偏转函数。 调制可能是空间或时间的。 还可以计算折射率分布。