Beckers J M, Dickson L, Joyce R S
Appl Opt. 1975 Sep 1;14(9):2061-6. doi: 10.1364/AO.14.002061.
We describe the properties of the Zeiss Universal Birefringent Filter and its optical and electronic interface with the Sacramento Peak Observatory'' vacuum telescope. The instrument permits observations of solar intensities, velocities, and/or magnetic fields in rapid succession in any Fraunhofer line in the 410-700-nm wavelength region with high spectral (0.004-0.013 nm) and high spatial (~1/3 sec of arc) resolution.
我们描述了蔡司通用双折射滤光片的特性及其与萨克拉门托峰天文台真空望远镜的光学和电子接口。该仪器能够在410 - 700纳米波长区域的任何夫琅禾费线中快速连续地观测太阳强度、速度和/或磁场，具有高光谱分辨率（0.004 - 0.013纳米）和高空间分辨率（约1/3角秒）。
