Quantitative Optical Phase Imaging Techniques: Non-Interference-Based Basics and Working Principle

Non-interference-based quantitative optical phase imaging is an imperative tool that has been gaining a lot of attention in recent years as it provides high throughput, real-time data and data handling with less complexity, and cost-effectiveness. It also provides 3D information through phase retrieval with high-resolution imaging of transparent samples without labelling, employing computational methods. Some of the methods include iterative algorithms, the transport of intensity equation, differential phase contrast method, etc. This chapter discusses the non-interference-based quantitative phase imaging methods, principles of operation, and pros and cons in the field of biomedical imaging.