| 摘要 |
PURPOSE:To use a lens in common for a transmission optical system and an observing optical system, to simplify the entire constitution and to make the entire system small in size by adopting the constituting such that a light beam is reflected in parallel with an optical axis of the light beam and the resulting light is observed together with an observing light. CONSTITUTION:A corner cube prism 9 is arranged in the front face of a lens 4 and a half mirror 21 is arranged between the lens 4 and a laser light source 3. Thus, the light beam LA1 radiated from the laser light source 3 passes through the half mirror 21 and is sent to a transmission object via the lens 4, part is reflected in the corner cube prism 9 and looped back in parallel with the optical axis of the light beam LA1. Moreover, the half mirror 21 of an optical space transmitter 20 reflects the loopback light beam LA5 looped back in the corner cube prism 9 together with an observing light LA6 coming from the transmission object side and is led to an eye contact lens 22. The lens 22 constitutes a telescope of Kepler type together with the lens 4 observing the transmission object. |
