论文标题
二分性过滤器的Mueller矩阵图揭示了极化畸变
Mueller matrix maps of dichroic filters reveal polarization aberrations
论文作者
论文摘要
仪表设计人员使用二科制过滤器将视场分为不同的光学路径，以同时测量不同的光谱带。量化二分色素的极化畸变与预测下游的入射极化状态有关，这可能会影响衍射有限系统的性能。一个重要的应用是系外行星成像冠状动脉的前视。在这项工作中，使用旋转减速器Mueller矩阵成像偏光仪测量了Edmund＃69-205 650 nm滚动二分法的极化特性。比较该商业二分色的极化特性在正常情况下和45 $^{\ Circ} $入射角。由于未观察到极化畸变，因此正常的发病率测量值验证了仪器校准。在680 nm和45 $^{\ Circ} $的传输测量结果产生2.9 rad幅度的延迟和0.95扭曲。有效地，在630 nm的情况下，二分性能是带有水平快速轴的$λ$/4波板。
Dichroic filters are used by instrument designers to split a field of view into different optical paths for simultaneous measurement of different spectral bands. Quantifying the polarization aberrations of a dichroic is relevant for predicting the incident polarization states downstream, which could affect the performance of diffraction limited systems. One important application is the fore-optics of exoplanet imaging coronagraphs. In this work, the polarization properties of the Edmund #69-205 650 nm roll-off dichroic are measured using a rotating retarder Mueller matrix imaging polarimeter. The polarization properties of this commercial dichroic are compared at normal and 45$^{\circ}$ angle of incidence. The normal incidence measurements verify the instrument calibration since no polarization aberrations were observed. Transmission measurements at 680 nm and 45$^{\circ}$ yield a 2.9 rad magnitude of retardance and 0.95 diattenuation. Effectively, at 630 nm the dichroic is a $λ$/4 waveplate with a horizontal fast-axis.
