Patent ID: 7166322
Filing Date: 2007-01-23
Classification: B29D,G02B

Abstract:
1. A method of producing an optical waveguide including a core including at least one column-shaped part, and a clad which has a refractive index lower than that of the core and with which the circumference of the core is covered, the method comprising: putting a first curable resin solution capable of being cured by a light beam with a certain wavelength in a desired vessel; irradiating the first curable resin solution with the light beam to cure a part of the first curable resin solution to thereby form the core including the at least one column-shaped part; taking a portion of an uncured part of the first curable resin solution out of the vessel after the formation of the core having a desired shape; filling the vessel containing the core formed as the cured part of the first curable resin solution with a second curable resin solution different in at least composition from the first curable resin solution and having mutual solubility for the first curable resin solution so that another portion of the uncured part of the first curable resin solution remaining in the vessel is dissolved in the second curable resin solution; and curing the another portion of the uncured part of the first curable resin solution and the second curable resin solution, wherein: each of the first and second curable resin solutions has a coefficient of viscosity not higher than 1500 mPa·s; and the difference between a solubility parameter of the first curable resin solution and a solubility parameter of the second curable resin solution is not larger than 4.4 MPa