•PACS Series Core technology of OMRON optical devices is Precisely Arrayed and Combined Solutions Structure, named as PACS structure. PACS's key element is micro-lens-array (MLA). OMRON optical devices have series of optical switch and CWDM Mux/Demux to be used PACS structure. All these devices are installed lens fiber array with MLA Adaptation of PACS structure is realized low cost and mass-production innovatively > Advantages of PACS structure •Reduction of parts number by using arrayed solutions •Collective alignment with man-hour reduction •Parts cost reduction by using individual technology •Progressive of the equipment standardization with same architecture > Features of PACS optical devices •Dramatically low cost •Super small-sized •PACS structure Cutting costs by using a lens replication process,providing customizable solutions by using a free shape lens,and reducing overall size by using a 250μm pitch are Omron's key advantages.Our new nano-technology polymer has enabled us to develop a higher performance Micro Lens Array.   • High Performance : More advanced by Nano-Technology Adding nano-sized powder to polymer,we have achieved an extremely low coefficient of linear expancion(5x10-5mm/ºc)while keeping very high transparency.The technology enabled us to use high performance AR coatings which pass damp heat tests.We achieved 0.3dB insertion loss and 50dB return loss facing lens to lens. SPICA is a new manufacturing technology for optical waveguide, which is a key device for optical communications, using replication technology which was formerty difficult to apply.SPICA technology means that unique optical waveguide replication technology, based on stacked integration technology, to realize all optical communication devices, and to achieve practical performance levels.This achieves dramatically lower costs.   • Replication prosess flow   • Core shape and output profile