Britain's oldest man, Henry Allingham, has received an unusual honor. He was invited to sit for a holographic portrait, which was unveiled by the Duchess of Gloucester to mark his 110th birthday. Holographic artist and portrait specialist Robert Munday, whose company Spatial Imaging is based in Richmond, England, invited Allingham to sit for a portrait in December 2005. The hologram master was made using a 10 J pulsed ruby laser; a 75 mW HeNe laser was used to transfer the master to a reflection hologram. "We used our conventional pulsed-laser portrait camera. It took a day to build the camera and 30 minutes to record the portrait," notes Munday. "Exposures with the pulse are 30 ns. It then took several days to make the reflection hologram copies."
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