Li Yifeng, Li Pangyue, Zheng Xinyan, Liu Huachen, Zhao Yiran, Sun Xueping, Liu Weiguo, Zhou Shun
School of Optoelectronic Engineering, Xi'an Technological University, Xi'an 710021, China.
Micromachines (Basel). 2024 Sep 21;15(9):1166. doi: 10.3390/mi15091166.
Light field cameras are unsuitable for further acquisition of high-quality images due to their small depth of field, insufficient spatial resolution, and poor imaging quality. To address these issues, we proposed a novel four-focal-square microlens and light field system. A square aspheric microlens array with four orthogonal focal lengths was designed, in which the aperture of a single lens was 100 μm. The square arrangement improves pixel utilization, the four focal lengths increase the depth of field, and the aspheric improves image quality. The simulations demonstrate pixel utilization rates exceeding 90%, depth-of-field ranges 6.57 times that of a single focal length, and image quality is significantly improved. We have provided a potential solution for improving the depth of field and image quality of the light field imaging system.
由于光场相机景深小、空间分辨率不足且成像质量差，因此不适合进一步采集高质量图像。为了解决这些问题，我们提出了一种新型的四焦距方形微透镜和光场系统。设计了一种具有四个正交焦距的方形非球面微透镜阵列，其中单个透镜的孔径为100μm。方形排列提高了像素利用率，四个焦距增加了景深，非球面则提高了图像质量。模拟结果表明，像素利用率超过90%，景深范围是单焦距的6.57倍，图像质量得到显著提高。我们为改善光场成像系统的景深和图像质量提供了一种潜在的解决方案。
