Vettenburg Tom, Harvey Andrew R
School of Physics and Astronomy, University of St Andrews, Fife, UK.
Appl Opt. 2013 Jun 10;52(17):3931-6. doi: 10.1364/AO.52.003931.
Reflective imaging systems are typically limited to small field angles in order to avoid overly large obscurations or off-axis aberrations. Reflective optics are often preferred in astronomy due to the associated lower weight and cost, as well as the absence of chromatic aberrations. Although these advantages are compelling, off-axis aberrations typically limit the field of view to a few degrees, while many imaging applications require a considerably larger useful field of view. A hybrid optical-digital design could alleviate the issues associated with wide-field reflective optics by exploiting the larger design freedom inherent in such systems. In this paper we demonstrate how a holistic design approach can enable reflective imaging systems with a consistently sharp image across a wide field of view.
反射成像系统通常限于小视场角，以避免过大的遮拦或离轴像差。由于相关的较低重量和成本以及不存在色差，反射光学器件在天文学中通常更受青睐。尽管这些优点很有吸引力，但离轴像差通常将视场限制在几度以内，而许多成像应用需要相当大的有用视场。混合光学 - 数字设计可以通过利用此类系统固有的更大设计自由度来缓解与宽视场反射光学器件相关的问题。在本文中，我们展示了一种整体设计方法如何能够使反射成像系统在宽视场上具有始终清晰的图像。
