Patent ID: 9167121
Filing Date: 2015-10-20
Classification: F21K,F21V,G02B,G03B,H04N

Abstract:
1. A lighting unit, comprising: a light source in which light-emitting elements are positioned in an array in a main scanning direction; a parabolic mirror that projects light emitted from the light source on an illumination region of an illuminated item; and a housing that houses or supports the light source and the parabolic mirror; wherein the parabolic mirror forms a shape in which a cylindrical paraboloid having curvature with respect to a sub-scanning direction has been clipped by an axial plane that is perpendicular to a vertex of the cylindrical paraboloid in the main scanning direction; and the light source is positioned such that a center or an edge of the light-emitting elements is caused to match a focal position of the cylindrical paraboloid, a central axis in the light-emitting direction of the light-emitting elements being perpendicular to the axial plane.