Laser Transmitting and Receiving Lens Optics.
DEPARTMENT OF THE NAVY WASHINGTON D C
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The patent describes an optical system using a concentric Bouwers lens having in the converging beam another lens to create parallel light paths to the concentric point of the Bouwers lens. At such concentric point, a mirror directs the light to the side. Upon reversal of the light paths, a parallel light beam or laser enters the system from the side, through the assembly to a target, and then back to the starting point where it is detected.
- Lasers and Masers