Sigma Koki Co., Ltd. is engages in the manufacture and sale of optical equipment parts and devices that are essential for basic research, development research, and applied research in the field of optical industrial technology, and provides services related to these products. It operates through the following segments: Component Parts and System Products. The Component Parts segment handles basic optical equipment, automated application, and thin film optic products. The System Products segment provides laser system products that include lens unit, laser processing systems, laser application products, micro-manipulation system, automatic system for microscopes, and commissioned custom-made products. The company was founded in April 1977 and is headquartered in Hidaka, Japan.