An x-ray telescope has a tubular housing subdivided into M number of radial segments each having a detector for detecting x-rays and an optic module for focussing x-rays onto the detector. The optic modules have polycapillary fibers assembled in subunit layers and asymmetrically arranged about an optical axis. The polycapillary fibers follow a natural cubic spline path to maximize transmission. The polycapillary fibers selectably collimated and decollimated to provide a predetermined field- of-view. A Fourier grid assembly is disposed in front of the optic modules and has M pairs of entrance and exit grids each aligned with a respective one of the optic modules. The pairs of entrance and exit grids have spaced apart bars with a bar spacing period such that N number of the bar spacing periods at the entrance grid subtends the predetermined field-of-view of the polycapillary fibers where N is an integer and is different for each of the pairs of entrance and exit grids. The pairs of grids are phased apart by 1/8 of the bar spacing period. The Fourier grid assembly is rotatably mount to provide incremental alignment with the optic modules thus permitting simultaneous measurement of polarimetry and imaging data.
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