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公开(公告)号：US5265479A
公开(公告)日：1993-11-30
申请号：US954406
申请日：1992-09-29
申请人： Alan J. Cook , Stephen D. Hawker
发明人： Alan J. Cook , Stephen D. Hawker
CPC分类号： G01L1/103 , G01D5/268 , G01L9/0011
摘要： An optically driven microresonator sensor comprising a sensor member having a vibratory bridge onto which a light beam is directed at a non-zero angle relative to a normal to said bridge, the light beam causing the bridge to oscillate at its resonant frequency, in use, in the direction of said normal, between a first position, where most of the incident light is reflected by the bridge to a light intensity measuring system, and a second position, where most of the incident light is not intercepted by said bridge, so that the reflected incident light sensed by said light intensity measuring system is reduced, the resonant frequency of oscillation of the bridge thus determined from said system, being dependent upon the nature of an applied force, such as stress, exerted on the sensor member.
摘要翻译： 一种光学驱动的微谐振器传感器，包括具有振动桥的传感器构件，光束相对于所述桥的法线指向非零角度，所述光束在使用中以其谐振频率摆动， 在所述法线的方向上，大多数入射光被桥梁反射到第一位置与光强度测量系统之间，以及第二位置，其中大部分入射光不被所述桥接器截取，使得 由所述光强测量系统感测到的反射入射光减少，由此从所述系统确定的桥的振荡的谐振频率取决于施加在传感器构件上的施加的力（例如应力）的性质。
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2.发明授权
公开(公告)号：US5418361A
公开(公告)日：1995-05-23
申请号：US204754
申请日：1994-03-02
摘要： An optical displacement sensor suitable for use in drowned environments where the refractive index of a medium in the optical path may vary, comprises a light source emitting first to fourth wavelengths. The first and second wavelengths are within the infrared region of the spectrum, whereas the third and fourth wavelengths are in the visible region of the spectrum. A zone plate focuses the first and second wavelengths to respective positions substantially at the extremes of movement of a reflective element whose position is to be measured. The zone plate also focuses the third and fourth wavelengths to respective positions. A cold mirror is interposed between the zone plate and the reflective element and is arranged to transmit the first and second wavelengths and to reflect the third and fourth wavelengths. The ratio of the intensities of the light reflected from the cold mirror gives information about the refractive index of the medium in the optical path. This information can be used to correct the measurement of the position of the reflective element which is determined by the ratio of reflected intensities of the first and second wavelengths.
摘要翻译： 适用于光路中的介质的折射率可能变化的淹没环境中的光学位移传感器包括发射第一至第四波长的光源。 第一和第二波长在光谱的红外区域内，而第三和第四波长在光谱的可见光区域。 区域板将第一和第二波长聚焦到基本上位于要测量其位置的反射元件的运动极限的相应位置上。 区域板还将第三和第四波长聚焦到相应的位置。 冷镜被插入在区域板和反射元件之间，并被布置成透射第一和第二波长并反射第三和第四波长。 从冷镜反射的光的强度的比率给出关于光路中的介质的折射率的信息。 该信息可以用于校正由第一和第二波长的反射强度的比率确定的反射元件的位置的测量。
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公开(公告)号：US5473156A
公开(公告)日：1995-12-05
申请号：US225377
申请日：1994-04-08
CPC分类号： G01D5/268
摘要： An optical displacement sensor comprises first and second optical fibers which transmit light to and receive light reflected from first and second fixed reflectors. A third optical fiber transmits light to and receives light reflected from a moving reflector on the end of a core which moves in response to the displacement to be measured. The intensities of the light reflected to the fibers allows the displacement to be determined with immunity from variations such as in transmissivity and refractive index of a medium between the fibers and the reflectors.
摘要翻译： 光学位移传感器包括第一和第二光纤，其将光透射并接收从第一和第二固定反射器反射的光。 第三光纤将光反射到被测量的位移而移动的光的一端移动的反射器上的光和光， 反射到纤维的光的强度允许通过纤维和反射体之间的介质的透射率和折射率等变化的抗扰度来确定位移。
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