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Refractive‐reflective optical system for realizing an ultra‐thin rear projector
Author(s) -
Shikama Shinsuke,
Suzuki Hiroshi,
Endo Takao,
Teramoto Kohei
Publication year - 2003
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1824257
Subject(s) - optics , projector , materials science , gradient index optics , distortion (music) , reflection (computer programming) , lens (geology) , brightness , refractive index , eyepiece , total internal reflection , projection (relational algebra) , physics , optoelectronics , computer science , amplifier , cmos , algorithm , programming language
— This paper presents a new optical system used in an ultra‐thin rear projector with a 1500‐mm diagonal size and 260‐mm depth. A refractive‐reflective optical system was developed to achieve a large projection angle of 136° with a small optical distortion of 0.1%. The optics consists 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 was developed to attain good uniformity of brightness and color within the image area.