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Design of Infrared Diffractive Telescope imaging optical systems

机译:红外衍射望远镜成像光学系统设计

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Diffractive telescope is an updated imaging technology, it differs from conventional refractive and reflective imaging system, which is based on the principle of diffraction image. It has great potential for developing the larger aperture and lightweight telescope. However, one of the great challenges of design this optical system is that the diffractive optical element focuses on different wavelengths of light at different point in space, thereby distorting the color characteristics of image. In this paper, we designs a long-wavelength infrared diffractive telescope imaging system with flat surface Fresnel lens and cancels the infrared optical system chromatic aberration by another flat surface Fresnel lens, achieving broadband light(from 8 μ m-12 μ m) to a common focus with 4.6° field of view. At last, the diffuse spot size and MTF function provide diffractive-limited performance.
机译:衍射望远镜是一种更新的成像技术,它与传统的折射和反射成像系统不同,后者基于衍射图像的原理。它具有开发更大口径和重量轻的望远镜的巨大潜力。然而,设计该光学系统的最大挑战之一是衍射光学元件聚焦在空间中不同点的不同波长的光上,从而使图像的色彩特性失真。在本文中,我们设计了具有平面菲涅尔透镜的长波长红外衍射望远镜成像系统,并通过另一个平面菲涅尔透镜消除了红外光学系统的色差,从而实现了从8μm至12μm的宽带光。具有4.6°视场的共同焦点。最后,漫射点大小和MTF函数提供了衍射极限性能。

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