Methods Portable lensless microscope The portable lensless holographic microscope consists mainly of an LED, a pinhole, a CMOS sensor, a 3D-printed housing, and electronics (Fig. 1a). Light produced from a GaN-based LED passes through a pinhole providing a partially coherent light source. It ...
Some of these correction techniques include the use of a separate pilot laser position sensing beam monitored by a CCD line scanner, or the equivalent. Other correction methods include the use of galvanometer mirror systems to apply corrections. All of these methods of correction result in ...
While optical microscopy and other optics-based methods have been exploited in many domains of human activity, from scientific research to warfare, for many hundreds of years, the advent of microprocessors, modern computing, and molecular biology have given rise to an ever-accelerating development of...
Autofocus camera systems and methods United States Patent 9625673 Abstract: A method for focusing a miniature camera includes providing a current through a coil, moving a lens of a camera based on the current to adjust a focus of the camera, and limiting movement of the lens along an optical...
Autofocus methods based on laser illumination. Opt. Express 2023, 31, 29465–29479. [Google Scholar] [CrossRef] [PubMed] Zhang, X.; Fan, F.; Gheisari, M.; Srivastava, G. A Novel Auto-Focus Method for Image Processing Using Laser Triangulation. IEEE Access 2019, 7, 64837–64843. [...
Based on the sharpness curve of an image stack, the path-optimized search is designed to modify local extrema, so that the accurate fundus autofocus can be achieved. 2.1. Adaptive Focus Window To improve autofocus speed and accuracy, most IBAF methods select partial regions as the focus window...