Automatic high order aberrations correction for digital holographic microscopy based on orthonormal polynomials fitting over irregular shaped aperture. (22nd March 2019)

• Record Type: Journal Article
• Authors: Yang, Zhongming; Liu, Zhaojun; He, Weilin; Dou, Jiantai; Liu, Xin; Zuo, Chao
• Is Part Of: Journal of optics. Volume 21:Number 4(2019)
• Publication Date: 2019-03-22
• Subjects: digital holography -- aberration compensation -- interference microscopy -- phase measurement; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/ab0e63
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: We propose an automatic high-order aberration correction method for digital holographic microscopy based on orthonormal polynomial fitting over an irregular-shaped aperture. The corner detection technique is used to detect the specimen-free area for orthonormal polynomials over an irregular-shaped aperture. The high-order aberration correction method is completely automatic and requires only a single hologram. Experiments showed that in aberration correction, both lower-order phase curvatures and high-order aberrations could be corrected without requiring extra devices. Numerical simulations show that the proposed method provides more accurate high-order aberration correction than aberration correction methods based on least squares fitting with standard polynomials. Experimental results demonstrate the feasibility of using the proposed method for analyzing human macrophage cells.