Positron scattering and channeling experiments require high quality (low emittance) beams. A new electrostatic Optics system for extracting positrons from a moderator is presented, The system features improved efficiency of focusing and beam transport of moderated positrons emitted with angular spreads up to +/- 30 degrees, with good phase space characteristics. The presented optics also provides a high degree of freedom in controlling exit beam trajectories. The system has been installed in the LLNL Pelletron accelerator and showed great enhancement on the beam quality. On the detection side, Image plates were used to measure the angular distributions of positrons transmitted through the gold crystals. The measurements demonstrate the advantages of image plates as quantitative position sensitive detectors for positrons.