Optical member with prisms

摘要

An illuminating apparatus includes a light source and an optical member that controls light distribution of light emitted from the light source in a forward direction. A plurality of prisms extending in one direction are provided on one principal surface of the optical member in regions on both sides when divided at a virtual plane that includes a reference axis. The plurality of prisms include reflecting prisms that reflect light from a light source that is disposed virtually on the reference axis and emit this light from the optical member. The light source is disposed such that its optical axis is shifted in one direction relative to the reference axis.

主权项

1. An optical member that controls distribution of light forwardly emitted from at least one light source, wherein
a plurality of prisms extending in one direction are provided on at least one among two principal surfaces of the optical member in regions on both sides when divided at a virtual plane that includes a reference axis of the optical member, the plurality of prisms include reflecting prisms that reflect light from a light source that is disposed virtually so as to include an optical axis on the virtual plane that includes the reference axis and emit the light from the optical member, and the optical member is arranged relative to the light source allowing that the optical axis of the light source is shifted to a region on one side when divided at the virtual plane that includes the reference axis.