Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-09-13
2005-09-13
Palmer, Phan T. H. (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C385S034000, C385S036000
Reexamination Certificate
active
06944375
ABSTRACT:
The invention relates to a technique of providing illumination light having an even intensity, in order to make intensity of three illumination light with a simple structure. A second optical waveguide having a second incidence plane for second color light and a third optical waveguide having a third incidence plane for third color light are joined to a first optical waveguide having a first incidence plane for first optical light and an emergence plane opposed to the first incidence plane. A first dichroic filter that reflects the first color light and the third color light and transmits the second color light is formed on a joint surface between the first optical waveguide and the second waveguide. A second dichroic filter that reflects the first color light and the second color light and transmits the third color light is formed on a joint surface between the first optical waveguide and the third waveguide.
REFERENCES:
patent: 2005/0018308 (2005-01-01), Cassarly et al.
patent: A 2000-56410 (2000-02-01), None
patent: 2000-194275 (2000-07-01), None
patent: A 2002-189263 (2002-07-01), None
Sakata Hidefumi
Takeda Takashi
Oliff & Berridg,e PLC
Palmer Phan T. H.
Seiko Epson Corporation
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