Thales Research & Technology, 1 Avenue Augustin Fresnel, 91767 Palaiseau CEDEX, France.
Opt Lett. 2009 Oct 1;34(19):2970-2. doi: 10.1364/OL.34.002970.
We consider optimization of hybrid imaging systems including a phase mask for enhancing the depth of field and a digital deconvolution step. We propose an image quality criterion that takes into account the variability of the system's point-spread function along the expected defocus range and the noise enhancement induced by deconvolution. Considering the classical cubic phase mask as an example, we show that the optimization of this criterion may lead to filter parameters that are significantly different from those usually proposed to ensure the strict invariance of the PSF.
我们考虑了包括相位掩模在内的混合成像系统的优化，以增强景深和数字反卷积步骤。我们提出了一个图像质量标准，该标准考虑了系统点扩散函数在预期离焦范围内的可变性以及反卷积引起的噪声增强。以经典的立方相位掩模为例，我们表明，该标准的优化可能会导致滤波器参数与通常为确保 PSF 的严格不变性而提出的参数有很大的不同。
