折射望远镜，    Galilean望远镜 Galilean Refracting Telescopes

气体再生设备，气体填充设备    Gas Recyclers and Gas Handling Equipment

激光用气体    Gases for Lasers

光学用气体    Gases for Optical Application

通信用(长波长)    Ge和III-V族检光模组 Long-wavelength Decector Modules for Communication

棱镜 Glan-Thomson Prisms    Glan-Thomson

玻璃，玻璃/陶瓷面镜    Glass and Glass-Ceramic Mirrors

玻璃产生机    Glass Generators

玻璃激光    Glass Lasers

光泽度计    Grossmeters

Nd:YA    G激光(半导体激光激发) Nd:YAG (LD Pumped) Lasers

YA    G激光加工机(半导体图案处理曝光用) YAG Laser Processing Equipment for Semiconductor Lithorgraphy