Abstract

We fabricated an emergency illumination panel by stacking two translucent pictures, one of which was painted with ink and the other with phosphors. When the panel was illuminated by backlight or room light, only the ink-printed picture was visible to the human eye and only the phosphorescent picture was visible in darkness. A two-way mirror was inserted between the two pictures both to prevent superimposition of the two images and to enhance phosphorescence. This phosphorescent emergency sign acted as an illuminator independently of electric power sources and provided sufficient brightness for reading newspaper headlines.

© 2004 Optical Society of America

Full-color illumination that needs no electric power

Mitsunori Saito, Naoki Adachi, and Hiroyasu Kondo
Opt. Express 15(4) 1621-1626 (2007)

Design and fabrication of an integrated polarized light guide for liquid-crystal-display illumination

Ko-Wei Chien and Han-Ping D. Shieh
Appl. Opt. 43(9) 1830-1834 (2004)

Bright afterglow illuminator made of phosphorescent material and fluorescent fibers

Mitsunori Saito and Kazuya Yamamoto
Appl. Opt. 39(24) 4366-4371 (2000)

High-Definition Imaging System Based on Spatial Light Modulators with Light-Scattering Mode

Hiroshi Kikuchi, Takanori Fujii, Masahiro Kawakita, Yoshiyuki Hirano, Hideo Fujikake, Fumio Sato, and Kuniharu Takizawa
Appl. Opt. 43(1) 132-142 (2004)

Laser-line-driven phosphor-converted extended white light source with uniform illumination

Atul Kumar Dubey, Mayank Gupta, Virendra Kumar, and Dalip Singh Mehta
Appl. Opt. 58(9) 2402-2407 (2019)