论文标题
高光谱摄像机中薄膜滤清器阵列的渐晕优势
A vignetting advantage for thin-film filter arrays in hyperspectral cameras
论文作者
论文摘要
相机镜片中的渐晕通常被视为要避免的东西。但是，对于具有薄膜干扰过滤器的光谱摄像机，我们认为渐晕可能是一个优势。当被聚焦光照射时，干扰过滤器的带宽随着主要射线角的增加而增加，从而导致光谱的位置依赖性平滑。我们表明，渐晕可用于减少平滑并保留重要的光谱特征。此外，我们证明，通过在镜头上添加其他渐晕，可以在整个场景中更加一致。这使得在光谱摄像头设计过程中成为有用的参数。
Vignetting in camera lenses is generally seen as something to avoid. For spectral cameras with thin-film interference filters, however, we argue that vignetting can be an advantage. When illuminated by focused light, the bandwidth of interference filters increases with the chief-ray angle, causing position-dependent smoothing of the spectra. We show that vignetting can be used to reduce smoothing and preserve important spectral features. Furthermore, we demonstrate that by adding additional vignetting to a lens, measurements can be made more consistent across the scene. This makes vignetting a useful parameter during spectral camera design.
