There are large demands to monitor the atmosphere in the closed space (hall, factory and so on), to check vegetation
remotely and to detect hazardous gases such as explosive gas and bio terror from explosion-proof distance. On the
contrary, traditional lidars have blind area, it is hard to monitor the atmosphere and the gas in the near range. In this study,
optical designs and concrete developments for the atmosphere monitoring and the certain gas detection in near range
were accomplished. Unique optical designs are introduced and their practical setups are explained.