Correction of dichroic mirror-induced PSF distortion in STED microscopy. Issue 12 (12th July 2018)

• Record Type: Journal Article
• Authors: Li, Yanghui; Zhou, Hui; Liu, Xiaoyu; Xia, Chengliang; Wang, Le
• Is Part Of: Journal of modern optics. Volume 65:Issue 12(2018)
• Page Start: 1424
• Page End: 1430
• Publication Date: 2018-07-12
• Subjects: Super-resolution -- fluorescence microscopy -- interference coatings; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2018.1442508
• Languages: English
• ISSNs: 0950-0340

Abstract

Abstract: Due to its spectral transmission/reflection properties, dichroic mirror (DM) is widely applied in nearly all microscopes to separate and combine beams with diverse wavelengths. However, its potential distortion effects to the point-spread function (PSF) have been ignored to a large extent. Here, we built a mathematical model to quantify these effects. Specifically, we focus on STED microscopy, whose performance is extremely sensitive to the systematic deficiencies. Both excitation and depletion beams are analysed, and the peak intensity and the shape of the effective PSF are calculated accordingly. More importantly, the strategy to compensate the DM-induced PSF distortion is also given in this paper.