Optical member with prisms
AssigneeMinebea Co., Ltd.
InventorRyohei Takayama
Life of this patent
Estimating the term…
Abstract
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.
Claims8
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.
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 divided 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,
- each of the divided regions is arranged in a direction orthogonal to the one direction that the prisms extend, and the divided regions define one region and an other region, and
- the one region and the other region each have a width different from each other.
Dependencies are inferred from the claim text.