Patent ID: 7470051
Filing Date: 2008-12-30
Classification: G02B,H01L

Abstract:
1. An optical device which guides illuminating light from a light source, comprising: a columnar light-guiding unit including an incidence face which the illuminating light from the light source is incident upon, an emission face which emits the illuminating light and has a larger area than the incidence face, and a reflection face which guides rays of the illuminating light which is incident from the incidence face to the emission face while bringing the rays to total internal reflection; and a holder which secures the columnar light-guiding unit in position for the light source, wherein the columnar light-guiding unit and the holder are connected together in a single piece only on the reflection face on the emission face side of the columnar light-guiding unit, and the holder includes a connector for connecting to the light source, the connector being disposed further to the incidence face side than the emission face side.