Patent ID: 7519243
Filing Date: 2009-04-14
Classification: G02B

Abstract:
1. A substrate comprising a substrate body adapted for interconnecting optical elements, wherein the substrate body is comprised of: an electrical wiring layer disposed on a first substrate body surface in such a manner as to be capable of electrically connecting a first optical element mounted above the side of the first substrate body surface; and an optical transmission path, which propagates lights being transmitted and received between said first optical element and a second optical element which is disposed on the side of a second substrate body surface, wherein the substrate body is a flexible wiring sheet, and wherein the optical transmission path is constituted by a lead-through path, which leads through said first substrate body surface and said second substrate body surface; wherein said first surface of the substrate body in said substrate body is set to be the surface defined in the width direction and length direction of said substrate body, while the second substrate body surface in said substrate body is configured as the back surface of said first substrate body surface in said substrate body, and further said optical transmission path is configured in such a manner as to provide a communication or connection between said first and second substrate body surfaces in the thickness direction of said substrate body, and wherein in the case where said first optical element is arranged such that an optical component disposed at said first optical element faces the first substrate body surface, there is provided a spacing setting mechanism for providing a spacing between said optical component and the substrate body.