用于天基成像的菲涅耳干涉仪阵列：试验台结果
Fresnel interferometric arrays for space-based imaging: testbed results
摘要：
本文介绍了菲涅耳干涉阵列实验台的实验结果。这种成像器的新概念涉及薄箔的衍射聚焦，其中数千个穿孔子孔径形成与菲涅耳波带片相关的图案。这种阵列是用于空间的，作为一种实现高角分辨率和高动态范围观测的轻质大孔径的方法。由于衍射聚焦的色度是由放置在靠近阵列的焦平面的小型衍射消色差器校正的。这里给出的实验室测试结果是用8厘米边长的正交阵列获得的，在600 nm波长处产生23米的焦距。主阵和聚焦光学系统是在我们实验室设计和组装的。这个系统形成一个消色差的图像。各种形状，大小，动态范围和强度的测试目标已被成像。我们提出的第一个图像，实现的动态范围，和角分辨率。
英文摘要：
This paper presents the results of a Fresnel Interferometric Array testbed. This new concept of imager involves diffraction focussing by a thin foil, in which many thousands of punched subapertures form a pattern related to a Fresnel zone plate. This kind of array is intended for use in space, as a way to realizing lightweight large apertures for high angular resolution and high dynamic range observations. The chromaticity due to diffraction focussing is corrected by a small diffractive achromatizer placed close to the focal plane of the array. The laboratory test results presented here are obtained with an 8 centimeter side orthogonal array, yielding a 23 meter focal length at 600 nm wavelength. The primary array and the focal optics have been designed and assembled in our lab. This system forms an achromatic image. Test targets of various shapes, sizes, dynamic ranges and intensities have been imaged. We present the first images, the achieved dynamic range, and the angular resolution.
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