Preface

The 4th Photonics Meeting 2021 (PM21) is an annual event organized by the Optical Society of Malaysia (OSM) in celebrating UNESCO International Day of Light. In conjunction with Photonics Meeting 2021, The 2nd Webinar on Engineering Education 4.0: Lasers, Optics and Photonics Technology was organized by Universiti Teknologi MARA Cawangan Terengganu in a collaboration with Universitas Airlangga, Surabaya. This program is a high impact program which allow researchers and scientists to share advances in optical engineering and applications, nanotechnology, while exchanging scientific knowledge among participants. The program has gather experts in Lasers, Optics and Photonics field to contribute in delivering ideas and experiences to all participants involved. This was held on 15th and 16th September 2021 virtually due to Movement Control Order (MCO) by the government. It was host by Universiti Teknologi MARA, Dungun, Terengganu, Malaysia. The speakers have presented their work using Cisco Webex of maximum 10 minutes and 5 minutes of question and answer. This two-day event consists of a conference and a webinar that receives nearly 21 participants from the photonics and optics field. It has been successfully conducted without any difficulties. A compilation of articles that represent the significant results of the conference has been selected to publish in this volume. List of Images, Committee are available in this pdf.

Edible Optics

What materials can be used to make optical elements – that are transparent and mostly homogeneous -- but which are also edible? Think of this as an exercise in optical engineering with a very odd requirement. Optical designers are often bound by restrictions that require their materials to be transparent in certain regions of the spectrum, or are vacuum-qualified for use in space, or which must function at extreme ntemperatures. This is just a very different requirement. If it seems too outrageous, consider that there can be practical reasons for this requirement. Several edible optical devices have, in fact, already been designed and constructed.