公开(公告)号：US3792928A

公开(公告)日：1974-02-19

申请号：US3792928D

申请日：1972-02-28

申请人： SCHLUMBERGER COMPTEURS

发明人： POILLEUX J

IPC分类号： G01B11/02 ,  G02B6/04 ,  G01C3/08

CPC分类号： G01B11/026

摘要： According to an illustrative embodiment of the invention, a technique is described for producing signals varying as a function of the distance of a surface relative to a reference face, comprising transmitting a beam of coherent light to an admitting end of a fiber optic bundle to transmit light to a reflecting surface opposite an emitting end of the bundle. A fiber optic receiver bundle having at least one receiving end for picking up light reflected by the surface is provided for transmitting a flux of reflected light to produce a signal related to this relative distance by a linear relationship over a certain range of variation of such distance. Such range may be varied by varying the angle of incidence of the coherent light beam on the admitting end. The receiving end may be transversely separated from the emitting end by an amount selected in accordance with a desired angle of incidence and a predetermined range. For the purpose of measuring the thickness of transparent bodies as measured by the distance between an outer and an inner face thereof opposite the emitting end, first and second respective receiving ends are provided such that light reflected by the inner face cannot be picked up by the first receiving end and vice-versa. A simple technique for determining the effects of variations of reflectivity of a light reflecting surface is also disclosed.

摘要翻译： 根据本发明的说明性实施例，描述了一种用于产生作为表面相对于参考面的距离变化的信号的技术，包括将相干光束传输到光纤束的允许端以传输 光到与束发射端相对的反射表面。 提供具有用于拾取由表面反射的光的至少一个接收端的光纤接收器束，用于传输反射光束，以在这种距离的一定变化范围上产生与该相对距离有关的信号线性关系 。 可以通过改变入射端上的相干光束的入射角来改变这种范围。 接收端可以根据期望的入射角度和预定范围而从发射端横向分开一定量。 为了测量通过其与发射端相对的外表面和内表面之间的距离测量的透明体的厚度，设置第一和第二相应的接收端，使得由内表面反射的光不能被 首先接收端，反之亦然。 还公开了用于确定光反射表面的反射率的变化的影响的简单技术。