可調式兆赫消色差波片以及兆赫消色差範圍調整方法

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

105122124

專利證號

I 592717

專利獲證名稱

可調式兆赫消色差波片以及兆赫消色差範圍調整方法

專利所屬機關 (申請機關)

國立清華大學

獲證日期

2017/07/21

技術說明

一種可調式兆赫消色差波片包括至少三片相位延遲片以及調整裝置。至少三片相位延遲片沿第一方向依序排列，並且用以提供在兆赫波段中的消色差範圍，以使減少通過可調式兆赫消色差波片的兆赫波在消色差範圍中的色差。至少三片相位延遲片分別包括液晶盒。調整裝置用以調整液晶盒的液晶分子指向角度，以對應改變至少三片相位延遲片在兆赫波段的雙折射率。通過可調式兆赫消色差波片的兆赫波在消色差範圍中具有相同的相位延遲，並且在兆赫波段中的消色差範圍依據至少三片相位延遲片的雙折射率來決定。另外，一種兆赫消色差範圍調整方法亦被提出。 The invention provides a tunable terahertz achromatic wave plate. The tunable terahertz achromatic wave plate includes at least three phase retarders and a tuning device. The at least three phase retarders are sequentially arranged according along a first direction, and configured to provide an achromatic range in the terahertz band, so as to reduce a chromatic aberration of a terahertz wave through the tunable terahertz achromatic wave plate in the achromatic range. The at least three phase retarders respectively include a liquid crystal cell. The tuning device is configured to tune a liquid crystal orientation angle of the liquid crystal cell, so that a birefringence of the at least three phase retarders in the terahertz band is changed correspondingly. The terahertz wave has same phase retardation in the achromatic range. The achromatic range in the terahertz band is determined according to the birefringence of the at least three phase retarders.

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03-5715131-62219

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