Optical waveguides – Directional optical modulation within an optical waveguide – Acousto-optic
Patent
1996-05-28
1997-10-14
Ngo, John
Optical waveguides
Directional optical modulation within an optical waveguide
Acousto-optic
385 10, G02B 610
Patent
active
056779704
ABSTRACT:
An optical scanning device of the thin film waveguide type, which has a scanning speed and excellent scanning accuracy that can be used in a laser beam printer, a digital copier, a facsimile apparatus or the like, and an image forming apparatus using the optical scanning device are disclosed. The optical scanning device comprising: a thin film waveguide; a light source for emitting a plurality of laser beams to the thin film waveguide; a comb-like electrode for exciting a surface acoustic wave for deflecting the laser beams in the thin film waveguide; and a plurality of emitting means for emitting the deflected laser beams to an outside of the thin film waveguide, the emitting means being equal in number to the laser beams is disclosed. In an embodiment, the plurality of emitting means are located at the same position in a traveling direction of the incident laser beams, and have different emittance angles. In another embodiment, the plurality of emitting means are located at different positions in a traveling direction of the incident laser beams, and have the same emittance angle.
REFERENCES:
patent: 3919669 (1975-11-01), Hartemann
patent: 4929042 (1990-05-01), Hatori et al.
patent: 4941722 (1990-07-01), Hatori
IEEE Transactions on Circuits and Systems, vol. CAS-20, No. 12, Dec. 1979, "Guided-Wave Acoustooptic Bragg Modulators for Wide-Band Integrated Optic Communications and Signal Processing", Chen. S. TSAI, pp. 1072-1098.
Technical Report of the Institute of Electronics, Information and Communication Engineers, OGE85-177 (1986), Nobuharu Nozaki et al., pp. 43-48.
Technical Report of the Institute of Electronics, Information and Communication Engineers, OGE88-139 (1989), Masami Hatori et al., pp. 9-15.
Fuji Xerox
Ngo John
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