Patent ID: 6575582
Filing Date: 2003-06-10
Classification: F21V,G03B

Abstract:
An illumination device, comprising:a light source; and a first optical unit arranged to direct light from said light source to an object, wherein said first optical unit has a lens part disposed a middle portion of said first optical unit and having such an optical power that each of both lens surfaces thereof has a positive refractive power to cause diverging light from said light source to exit in a light-collected state, and reflective surfaces disposed on both sides of said lens part and arranged to reflect light from said light source toward the object, and wherein said first optical unit further has exit surfaces disposed on both sides of said lens part and arranged to cause the light reflected by said reflective surfaces to exit, the light caused to exit being in the light-collected state, and wherein said first optical unit further has a plurality of convex lens surfaces provided on the object side of the light ejection surface of said first optical unit other than the lens part.