| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emitting device which greatly effectively utilizes a light emitted from an LED element and especially a light emitting device for emitting a low-NA signal light usable for optical communications. SOLUTION: The light emitting device mounts a light emitting diode element sideways and emits a light from this diode element to outside via an optical guide surrounded with a reflective surface. The optical guide has a shape tapered from the outside to the light emitting diode element, the diode element is preferably housed in the optical guide, and the optical guide is preferably filled with a light-permeable body which preferably has a hardness of JIS (A type) 70 degrees or less and a refractive index within a range of 1.30-1.60 and is preferably one kind selected among silicone resins, acrylic resins, epoxy resins, elastomer resins and their derivatives. |
