Patent ID: 7307787
Filing Date: 2007-12-11
Classification: G02B

Abstract:
1. A beam splitting prism, having an incident end face and an outgoing end face being orthogonal to or parallel to each other, the beam splitting prism comprising; a plurality of transparent mediums combined to be bonded such that a plurality of bonded surfaces are tilted at 45° relative to a propagating direction of a beam propagating inside the beam splitting prism, and including at least two pairs of bonded surfaces whose normal directions are orthogonal to each other, a beam splitting optical element positioned at least between one pair of the two pairs of bonded surfaces, and including a splitting surface splitting an incident beam into a transmission beam and a reflection beam reflecting a part of the incident beam at 90°, and a reflecting optical element positioned at least between another pair of the two pairs of bonded surfaces whose normal direction is orthogonal to that of the bonded surfaces in which the beam splitting optical element exists, and including a reflecting surface which reflects at least a part of the beam split by the beam splitting optical element at 90°, whereby a beam incident from the incident end face is outputted from the outgoing end face in the form of a plurality of split output beams.