Patent ID: 6894852
Filing Date: 2005-05-17
Classification: G02B

Abstract:
1. An optical device for a plane image input device, characterized in that: the optical device is associated with an illuminating source of the plane image input device and the optical device comprises a body which includes an incident end and an emergent end, wherein a light beam emitted by the illuminating source enters the body via the incident end, undergoes a total reflection, and emerges from the emergent end; wherein the body includes the incident end, the emergent end, a first reflector, a second reflector, a third reflector, a fourth reflector, a first junction surface, and a second junction surface; the first reflector coupled to the incident end, the first reflector connected to the first junction surface at an angle of 135 degrees, the first junction surface connected with the emergent end, the second reflector connected to the emergent end, the second reflector coupled to the third reflector at an angle of 90 degrees, the second junction surface connected to each of the third reflector and to the fourth reflector at an angle of 135 degrees, and the fourth reflector connected to the incident end.