Patent ID: 9518847
Filing Date: 2016-12-13
CPC Classification: G01B,G01D

Claim Text:
1. A light guide sensor comprising: a light source; a light guide member elongated in a longitudinal direction, the light guide member comprising a core which guides light radiated from the light source, a cladding formed around the core, and at least one detecting portion; and a light receiving unit which receives the light that has been guided by the light guide member and has passed via the detecting portion, wherein the detecting portion having a first opening formed by removal of at least part of the cladding resulting in the cladding having a first thickness at the first opening in a thickness direction perpendicular to the longitudinal direction such that the cladding having the first thickness is sufficient so as to not transmit the light from the core, the detecting portion further having a second opening which is formed in the cladding having the first thickness and within a width of the first opening, the width being in a direction perpendicular to the thickness direction, the second opening one of exposing the core or resulting in a second thickness of the cladding sufficient so as to transmit the light from the core.