Photorefractive glass article
Photorefractive holographic interference novelty filter
Photorefractive limiting quadratic processor
Photorefractive square law converter
Photorefractive system and process for its use
Photorefractive systems and methods
Photorefractive systems and methods
Photorefractive two-beam coupling nonlinear joint transform corr
Photorestrictive device controller and control method therefor
Photoselective absorbing filter and color display equipped...
Photosensitive electrochromic device
Photostable self-erasing electrochromic device
Photostrictive device
Photostructured imaging display panels
Phototaking lens system
Phototaking optical system and optical device
Photovoltaic powering and control system for electrochromic wind
Physically compact variable optical delay element having wide ad
Piano MEMS with hidden hinge
Pick-up apparatus for digital storage medium