Illumination apparatus and image-taking apparatus
AssigneeCanon Kabushiki Kaisha
InventorNobuhisa Kojima
Life of this patent
Estimating the term…
Abstract
An illumination apparatus having a structure which can make the inside of the apparatus hard to be seen from the outside without deterioration of light distribution, and is applicable to illumination apparatuses having an optical member utilizing total reflection. The illumination apparatus comprises a light-emitting tube extending in a first direction; and an optical member including an entrance portion where a luminous flux from the light-emitting tube enters and an exit portion where the luminous flux exits. The exit portion includes a plurality of surfaces arranged in a second direction orthogonal to the first direction, the surfaces being orthogonal or inclined with respect to the optical axis direction, and located at different positions in the optical axis direction.
Claims7
An illumination apparatus comprising:
- a light-emitting tube which extends in a first direction;
- and
- an optical member which includes an entrance portion where a luminous flux from the light-emitting tube enters and an exit portion where the luminous flux exits,
- wherein the exit portion includes a plurality of surfaces which are arranged in a second direction orthogonal to the first direction, the surfaces being orthogonal or inclined with respect to the optical axis direction of the illumination apparatus, and located at different positions in the optical axis direction.
Dependencies are inferred from the claim text.