Mas Adrien, Druart Guillaume, De La Barrière Florence
Opt Express. 2020 Nov 9;28(23):35216-35230. doi: 10.1364/OE.408442.
Multi-view architectures using lens arrays can bring interesting features like 3D or multispectral imagery over single aperture cameras. Combined with super-resolution algorithms, multi-view designs are a way to miniaturize cameras while maintaining their resolution. These optical designs can be adapted for thermal infrared imagery and can thus answer the size, weight and power (SWAP) challenge with advanced imagery functions. However, in this spectral range, the choice of an uncooled microbolometer detector imposes a high numerical aperture for the system which increases the size of the optics and makes difficult a multi-channel arrangement combined with a single focal plane array (FPA). In this paper, we theoretically investigate several asymmetric or decentered multi-view designs that allow both a high aperture for the optical channels and the use of a single FPA for the sub-images. Ray-traced designs will illustrate this study and their image quality will be checked with modulation transfer functions (MTF) for different field points.
使用透镜阵列的多视图架构可以带来诸如单孔径相机上的三维或多光谱成像等有趣特性。与超分辨率算法相结合，多视图设计是一种在保持分辨率的同时使相机小型化的方法。这些光学设计可适用于热红外成像，从而凭借先进的成像功能应对尺寸、重量和功率（SWAP）挑战。然而，在这个光谱范围内，选择非制冷微测辐射热计探测器会给系统带来高数值孔径，这会增加光学元件的尺寸，并使得难以将多通道布置与单个焦平面阵列（FPA）相结合。在本文中，我们从理论上研究了几种不对称或偏心的多视图设计，这些设计既允许光学通道具有高孔径，又允许对子图像使用单个FPA。光线追迹设计将说明这项研究，并将使用不同视场点的调制传递函数（MTF）来检查其图像质量。
