Optical waveguides – Noncyclindrical or nonplanar shaped waveguide
Reexamination Certificate
2007-01-09
2007-01-09
Lee, John D. (Department: 2874)
Optical waveguides
Noncyclindrical or nonplanar shaped waveguide
C385S901000, C362S615000, C362S628000
Reexamination Certificate
active
10958998
ABSTRACT:
In a front light equipped with a light source and a transparent plate emitting light from a light emitting surface which is situated at the reverse side against an observation side surface by conducting light from the light source, the reflection preventive patterns comprising the minute unevennesses30for prevention of reflection are formed on the light emitting surface. When a wavelength of visible light with the shortest wavelength among light which is emitted from the light source24is λmin, the refractive index of the transparent plate is n1and the refractive index of air is n0, the period p of the minute unevennesses30satisfies the following equation. p<λmin/(n0+n1). Thereby, it can be prevented that the diffracted light is emitted from the reflection preventive patterns (light emitting surface) of the transparent plate.
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Aoyama Shigeru
Funamoto Akihiro
Matsui Yuki
Lee John D.
Omron Corporation
Osaka University
Osha & Liang LLP
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