All-optical angular sensing based on holography multiplexing with spherical waves

An all-optical angular sensing system based on volume ho- lography is proposed and demonstrated, where a divergent spherical wave is the reference and reading beam for writing and testing, respec- tively. Under the paraxial condition, analysis shows that angular selectiv- ity is nearly independent of the distance between the hologram and the light source. By choosing an appropriate distance, the entire energy of the source (e.g., an LED) can be employed while maintaining the same resolution for precise angular sensing. © 2002 Society of Photo-Optical Instru- mentation Engineers. (DOI: 10.1117/1.1511748)