Interesting posters from SPIE Optical Engineering + Applications San Diego, CA, 2011

1. Na variability and LGS elongation: impact on wavefront error, Katharine J. Jones, WBAO Consultant Group (United States). . . . . . . . . . . . . . . . . . . .[8149-14]
2. MT_RAYOR: a versatile raytracing tool for x-ray telescopes, Niels Jørgen S.
   
   Westergaard, Technical Univ. of Denmark (Denmark) . . . . . . . . . . . . . [8147-64] <---- this simulator is actually written on Yorick
3. A hardware implementation of nonlinear correlation filters, Saul Martinez-
   
   Diaz, Hugo Castañeda Giron, Instituto Tecnológico de La Paz (Mexico)[8135-49] <--- the poster actually is about morphological filtres implemented in hardware.
4. Development of the visual encryption device using higher-order
   
   birefringence, Hiroyuki Kowa, Takanori Murana, Kentaro Iwami, Norihiro
   
   Umeda, Tokyo Univ. of Agriculture and Technology (Japan); Mitsuo Tsukiji,
   
   Uniopt Co. Ltd. (Japan); Atsuo Takayanagi, Tokyo Univ. of Agriculture and
   
   Technology (Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [8134-32]
5. Enhancement of the accuracy of the astronomical measurements carried
   
   on the wide-field astronomical image data, Martin Rerábek, Petr Páta, Czech
   
   Technical Univ. in Prague (Czech Republic) . . . . . . . . . . . . . . . . . . . . . [8135-58]
6. Astronomical telescope with holographic primary objective, Thomas D.
   
   Ditto, 3DeWitt LLC (United States) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [8146-40]
7. Calibration of the AVHRR near-infrared (0.86 μm) channel at the Dome
   
   C site, Sirish Uprety, Changyong Cao, National Oceanic and Atmospheric
   
   Administration (United States). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [8153-74]