Color image sensor and a production method of an optical waveguide array for use therein

A color image sensor comprising:

• a white light source radiating white light on an original;
• a microlens array for condensing light emitted from said white light source and reflected from the original;
• an optical waveguide array having a plurality of waveguides which transmit the condensed light which has been focused by said microlens array;
• and
• a photoelectric converting device which receives light transmitted through the plurality of waveguides and converts the light into electric signals,
• said optical waveguide array having a laminated structure made up of three waveguide layers, each waveguide layer having a different core substance of three kinds for creating three types of waveguides which allow light to form three independent color beams that cover the complete range of colors.

A color image sensor comprising:

• a white light source radiating white light on an original;
• a microlens array for focusing light emitted from said white light source and reflected from the original;
• an optical waveguide array having a plurality of waveguides which transmit the light which has been focused by said microlens array;
• and
• a photoelectric converting device which receives light transmitted through the plurality of waveguides and converts the light into electric signals,
• said optical waveguide array having a laminated structure made up of three layers of waveguides and clad layers over the waveguides, each clad layer having a different clad substance for creating three kinds of waveguides which allow light to form three independent color beams that cover the complete range of colors.