Voss A, Plass W, Giesen A
Appl Opt. 1994 Dec 20;33(36):8370-4. doi: 10.1364/AO.33.008370.
We present a simple method to determine precisely the specular reflectance of optical components. The absence of transmissive elements in this method makes a wide spectral range available. High accuracy and precision are achieved with a fast, periodic change between the reference beam and the probe beam. Special efforts were made to eliminate inhomogeneities of beam intensity and detector sensitivity. With our experimental setup we obtain a precision of ±3 × 10(-4) at the wavelength of 10.6 µm and ±3 × 10(-5) at 1.06 µm for a single-bounce-measuring setup.
我们提出了一种精确测定光学元件镜面反射率的简单方法。该方法中不存在透射元件，从而可实现较宽的光谱范围。通过在参考光束和探测光束之间进行快速、周期性的切换，可实现高精度和高准确度。我们还特别努力消除了光束强度和探测器灵敏度的不均匀性。利用我们的实验装置，对于单次反射测量装置，在波长10.6 µm处可达到±3×10(-4)的精度，在1.06 µm处可达到±3×10(-5)的精度。
