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一种基于经典的光子漫射理论的混杂、反射型的光学传感器已被设计了。该传感器可连续地测量全血中的血红蛋白含量(Hb)和氧饱和度(Os)。该样品传感器包型一个发光二极管(LED)及安装在单片基座上的光敏芯片,并装在一个表面复盖一层干净的环氧树脂的盒子里。LED发射的波长为665及795nm。血红蛋白含量的采集是通过波长为795nm的光反射的,该波长非常近似于isosbestic所发射的805nm的波长。在评价血红蛋白含量和氧饱和度时,将传统的双重波长率法作了一些修改:即增加一个常数C,并将其命名为R795-(R665+C),以此来排除红细胞压积变化的影响,在R795与R665处是相应于665与795nm的反射,常数C取决于传感器的几何形状和血液的生理特性。这种传感器曾用于测量山羊、小牛和人,全血的红细胞压积在20～45％的范围。此种修改比率的方法
A hybrid, reflective optical sensor based on classical photon diffusion theory has been designed. The sensor continuously measures hemoglobin content (Hb) and oxygen saturation (Os) in whole blood. The sample sensor package consists of a light-emitting diode (LED) and a photosensitive chip mounted on a monolithic base and housed in a box covered with a clear epoxy resin. LEDs emit at wavelengths of 665 and 795 nm. The collection of hemoglobin content is reflected by light with a wavelength of 795 nm, which is very similar to the wavelength of 805 nm emitted by the isosbestic. In the evaluation of hemoglobin content and oxygen saturation, the traditional double-wavelength method made some changes: to add a constant C, and named R795- (R665 + C), in order to rule out changes in hematocrit The effect, at R795 and R665, corresponds to a reflection of 665 and 795 nm, the constant C depends on the geometry of the sensor and the physiological characteristics of the blood. This sensor has been used to measure goats, calves and humans, whole blood hematocrit in the range of 20 to 45%. This method of changing the ratio