介绍了由作者研制的光谱范围从３６５至１２０００ｎｍ的高精度光电自动折射仪的测量原理、主要误差源和仪器组成。用该仪器对包括红外材料锗在内的多种样品进行了测量，在小于２６００ｎｍ和大于２６００ｎｍ的波长范围内分别获得了优于±３×１０－６和±５×１０－５的折射率测量精度。 The measuring principle, main error source and instrument of high precision electro-optic refractor with spectral range from 365 to 12000nm were introduced. A wide variety of samples including germanium as an infrared material were measured using this instrument to obtain refractive index measurements superior to ± 3 × 10 -6 and ± 5 × 10 -5 in the wavelength range of less than 2600 nm and greater than 2600 nm, respectively Accuracy.