关键词: 激光技术, 延迟器, 全内反射角 , 光谱特性, 消色差

Abstract: Based on the total-reflection phase transformation theory of phase retardation, spectral characterization of the phase retardation varying with refractive index is analyzed, by means of the Fresnel rhomb. The result indicates that in the designed center of the wavelength, the retarder is not only confined within the low dispersive medium, but high-index material with higher dispersion can also obtain good achromatism, and at the same time the bigger angle of total reflection can improve achromatism of the phase retarder. So the theoretical basis is provided for optimizing achromatism of the rhomb-type retarder and the material selecting scope can be extended.

Key words: total internal reflection angle , spectral characterization, achromatism, phase retarder, laser technique