We describe a new instrument capable of high-precision (10⁻⁵) polarimetric observations simultaneously in three passbands (BVR). The instrument utilizes electron-multiplying charge-coupled device (EM CCD) cameras for high efficiency and fast image readout. The key features of the Double Image Polarimeter—Ultra Fast (DIPol-UF) are: (i) the optical design with high throughput and inherent stability; (ii) great versatility, which makes the instrument optimally suitable for observations of bright and faint targets; and (iii) a control system, which allows the use of the polarimeter remotely. Examples are given of the first results obtained from high signal-to-noise observations of bright nearby stars and of fainter sources such as X-ray binaries in their quiescent states.

我们描述了一种能够在三个通带（BVR）中同时进行高精度（10 ^-5）极化观测的新仪器。该仪器利用电子倍增电荷耦合器件（EM CCD）相机来实现高效率和快速的图像读取。双图像旋光仪超快（DIPol-UF）的主要特点是：（i）具有高通量和固有稳定性的光学设计；（ii）多功能性强，使该仪器最适合观察明亮和微弱的目标；（iii）控制系统，可远程使用旋光仪。举例说明了从明亮的附近恒星和较暗的源（例如处于静止状态的X射线双星）的高信噪比观测获得的第一个结果。