Optical dome is an important component in submersibles, it has wide-angle and can be protective of the deep-sea camera. YT Optics can provide maximum optical dome diameter is increased from 124mm to 300mm. it is hemisphere dome and have a big space inside optical domes. It can provide a safe space of 300 square centimeters underwater with 6000m deep. This means that the domes can protected a larger camera, sensing and exploration applications from harsh liquid.