Illumination device
AssigneeNikon Corporation
InventorsAtsushi Kawahara, Osamu Inoue
Life of this patent
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Abstract
An illumination device for an image input device includes a cylindrical light guiding unit, a board having a plurality of light emitting diode elements, a connection member connecting the light guiding unit with the board and a terminal reflection member formed at one end of the light guiding unit. A surface of the light guiding unit has a scattering reflection member extending linearly along the axial direction of the light guiding unit. A cylindrical reflection member is spaced around the light guiding unit and a linear space is provided in the reflection member along the axial direction of the guiding unit.
Claims10
A lighting device comprising:
- a main light guiding unit formed by a rod-shaped transparent member defining an axial direction;
- a sub-light guiding unit connected to an outer perimeter of the main light guiding unit and extending tangentially from the main light guiding unit;
- a linear-shaped light scattering unit provided along the axial direction of main light guiding unit;
- and
- a light source linearly parallel to the axial direction of the main light guiding unit and facing the sub-light guiding unit.
An illumination device comprising:
- a cylindrical light guiding unit;
- a light source having a plurality of light emitting devices;
- a connecting device provided between the light guiding unit and the light source for guiding light to the light guiding unit;
- a light scattering reflection member extending linearly along an axial direction of the cylindrical light guiding unit;
- and
- a space extending linearly along the axial direction of the light guiding unit to allow light to pass, wherein the connecting device comprises a guiding unit connected to an outer perimeter of the cylindrical light guiding unit and extending from the cylindrical light guiding unit in a direction perpendicular to an axial direction of the light guiding unit.
Dependencies are inferred from the claim text.