The synergistic fusion of optical technologies and mechatronics leads to the promising domain of Optomechatronics. Some of the common optical devices such as cameras, microscopes, optical mouse, optical disc drives, DMD and LCD projection systems, laser printers, are only a few examples of the long list of devices where the interdisciplinary field of optomechatronics pervades. The International Symposium on Optomechatronic Technology attempts to bring together researchers, professionals and academicians associated with Optomechatronics or its constituent subdomains such as optics and photonics on a common platform conducive to formal and informal academic interaction. The 20th edition of International Symposium on Optomechatronic Technology (ISOT 2019) will be a three day conference jointly organized by University of Calcutta and Goa University and will be held in the campus of Goa University. ISOT 2019 will comprise of plenary, invited, and contributory oral and poster sessions. All contributory submissions will be peer reviewed. Interactive sessions to foster networking and formation of well focused collaborations among research groups and Industry sessions are also envisaged.