Cook R O, Hamm C W
Appl Opt. 1979 Oct 1;18(19):3230-41. doi: 10.1364/AO.18.003230.
Intrinsic performance limits of noncontacting fiber lever displacement measuring systems are quantitatively described. Generalized relationships linking displacement detection limit, frequency response, dynamic range, linearity, and working distance to fiber diameter, illumination irradiance and coupling angle, photodetector characteristics, and reflection and transmission losses were obtained by analysis and confirmed by measurement. Both procedures showed performance limits to be functions of the square root of the flux density coupled into the target-illuminating fiber(s) by the electroluminescent source. Displacement detection and bandwidth limits achievable with tungsten or LED sources were in the 2 x 10(-11) to 2 x 10(-12) [equation] and MHz, range respectively. A basis for optimizing levers for different applications and determination of intrinsic performance limits is provided.
对非接触式光纤杠杆位移测量系统的固有性能极限进行了定量描述。通过分析得出了将位移检测极限、频率响应、动态范围、线性度和工作距离与光纤直径、照明辐照度和耦合角、光电探测器特性以及反射和传输损耗联系起来的广义关系，并通过测量得到了证实。这两种方法都表明，性能极限是由电致发光源耦合到目标照明光纤中的通量密度平方根的函数。使用钨光源或发光二极管光源可实现的位移检测和带宽极限分别在2×10^(-11)[公式]和兆赫兹范围内。为针对不同应用优化杠杆以及确定固有性能极限提供了依据。
