Title :
Refractive-reflective optical system for realizing ultra-thin rear projector
Author :
Shikama, Shinsuke ; Suzuki, Hiroshi ; Endo, Takao ; Teramoto, Kohei
Author_Institution :
Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kamakura, Japan
Abstract :
The paper presents a new optical system used in an ultra-thin rear projector with 1500 mm diagonal size and 260 mm depth. A refractive-reflective optical system was developed to achieve a large projection angle of 136 degrees and a small optical distortion of 0.1%. The optics consist of a convex aspherical mirror and a refractive lens. In addition, a new Fresnel screen composed of hybrid blades of refractive-TIR (total internal reflection) elements has been developed to attain good uniformity of brightness and color within the image area.
Keywords :
Fresnel diffraction; aspherical optics; colour displays; large screen displays; lenses; mirrors; optical projectors; screens (display); 1500 mm; 260 mm; Fresnel screen; brightness; color; convex aspherical mirror; hybrid blades; optical distortion; refractive lens; refractive-TIR elements; refractive-reflective optical system; total internal reflection elements; ultra-thin rear projector; Engines; Lenses; Lighting; Mirrors; Optical design; Optical distortion; Optical filters; Optical mixing; Optical refraction; Stimulated emission;
Conference_Titel :
Consumer Electronics, 2003. ICCE. 2003 IEEE International Conference on
Print_ISBN :
0-7803-7721-4
DOI :
10.1109/ICCE.2003.1218999
