LIGHTING APPARATUS AND LIGHT GUIDE

摘要

According to one embodiment, a lighting apparatus includes a light source which includes a light emitting surface, and a light guide provided to be coaxial with an axis which extends along a direction perpendicular to the light emitting surface. The light guide includes: an incident plane facing the light emitting surface; an outer circumferential surface configured to protrude in a direction extending away from the light source so as to surround the axis from an outer periphery of the incident surface and so as to totally reflect light from the light source which is made to enter the light guide from the incident surface; and a hollow part provided at a position distant in the axis direction from the incident surface. The hollow part includes a first light diffusing surface parallel to an axis along which the light totally reflected on the outer circumferential surface is led.

主权项

1. A lighting apparatus comprising:
a light source which comprises a semiconductor light emitting element and a light emitting surface configured to emit light; and a light guide member provided coaxially with an axis extending along a direction perpendicular to the light emitting surface, the light guide member configured to allow the light to penetrate, wherein the light guide member comprises
an incident plane facing the light emitting surface,an outer circumferential surface which is extended from an outer peripheral edge of the incident plane in a direction extending away from the light source so as to surround the axis, and is configured to totally reflect the light which is made to enter the light guide member from the incident plane, anda hollow part which is provided at a position distant from the incident plane along an axial direction, and comprises a first light diffusing surface parallel to the axis to which the light totally reflected on the outer circumferential surface is led.