Patent ID: 7722193

Claim:
A light source apparatus for an optical projecting system, the light source apparatus having a first optical axis and a second optical axis perpendicular to the first optical axis, the light source apparatus comprising: a first light source, disposed on the first optical axis, for emitting a first upper light and a first lower light parallel to the first optical axis; a second light-guiding device, disposed below the first optical axis, for guiding the first lower light to be a first reflected lower light opposite to the direction of the first lower light; a third light-guiding device, disposed on the first optical axis and near the first light source, for guiding the first reflected lower light to be a first reflected upper light substantially overlapping the first upper light; a first light-guiding device, disposed at an intersection point of the first optical axis and the second optical axis opposite to the second light-guiding device and above the first optical axis, for guiding the first upper light and the first reflected upper light further traveling in a direction parallel to the second optical axis; a second light source, disposed on the first optical axis and opposite to the first light source, for emitting a second upper light and a second lower light parallel to the first optical axis; a fifth light-guiding device, disposed above the first optical axis, for guiding the second upper light to be a second reflected upper light opposite to the direction of the second upper light; a sixth light-guiding device, disposed on the first optical axis and near the second light source, for guiding the second reflected upper light to be a second reflected lower light substantially overlapping the second lower light; and a fourth light-guiding device, disposed at the intersection point of the first optical axis and the second optical axis opposite to the fifth light-guiding device and below the first optical axis, for guiding the second lower light and the second reflected lower light further traveling in a direction parallel to the second optical axis, wherein the first light-guiding device and the fourth light-guiding device are crosswise disposed through middle portions thereof.