Photocopying – Contact printing – Light boxes
Patent
1990-05-29
1991-05-14
Ullah, Akm
Photocopying
Contact printing
Light boxes
355 1, G02B 608, G02B 2700
Patent
active
050150669
ABSTRACT:
In a preferred embodiment of the present invention there is provided a substrate having formed therein a plurality of optical waveguides. The waveguides are formed in a fanned out pattern with each alternate waveguide having a different width. At the fanned out ends of each of the waveguides there is coupled an optical fiber for transmitting light to the optical waveguide. In another embodiment of the invention, a substrate block is formed of glass, plastic, or X-cut LiNbO.sub.3 material and each waveguide in LiNbO.sub.3 is formed by diffusing strips of Ti or other suitable optical waveguide material into the substrate in a desired fan pattern and by forming an overcoat with a material, such as MgO for LiNbO.sub.3, which has an index of refraction that causes the output beam to be symmetrically formed. In yet another embodiment of the invention each of the optical waveguides is formed with a narrow width portion and a wide width portion with the narrow width portions of each of the waveguides being adjacent the wide width portions of a neighboring waveguide.
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Dugas Edward
Eastman Kodak Company
Ullah Akm
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