Opt Express. 2023 Apr 24;31(9):13837-13850. doi: 10.1364/OE.489326.
We proposed a digital-optical co-design that can effectively improve the image quality of refractive-diffractive hybrid imaging systems over a wide ambient temperature range. Diffraction theory was used to establish the degradation model and blind deconvolution image recovery algorithm was used to perform recovery for simulated images. The peak signal-to-noise ratio (PSNR) and structural similarity (SSIM) were used to evaluate the algorithm performance. A cooled athermalization dual-band infrared optical system with a double-layer diffractive optical element (DLDOE) was designed, and the results show an overall improvement for both PSNR and SSIM overall the whole ambient temperature range. This demonstrates the effectiveness of the proposed method for the image quality improvement of hybrid optical systems.
我们提出了一种数字-光学协同设计，可以有效地提高宽环境温度范围内折射-衍射混合成像系统的图像质量。我们使用衍射理论建立了退化模型，并使用盲反卷积图像恢复算法对模拟图像进行恢复。我们使用峰值信噪比 (PSNR) 和结构相似性 (SSIM) 来评估算法性能。设计了一个具有双层衍射光学元件 (DLDOE) 的冷却无热化双波段红外光学系统，结果表明在整个环境温度范围内，PSNR 和 SSIM 都得到了整体提高。这证明了该方法对混合光学系统图像质量改善的有效性。
