Patent ID: 9664909
Date: 2017-05-30
CPC Classifications: G02B

Claim:
1. A device comprising: a first optical element monolithically formed from a single piece of material as a first substantially triangular prism having two triangular planar sides, a first planar surface, a second planar surface, and a third curved surface, wherein the second planar surface is opposite a first angle formed by the first planar surface and the third curved surface; and a second optical element formed as a second substantially triangular prism and having two triangular planar sides, a first planar surface, a second planar surface, and a third planar surface, wherein the second planar surface of the second optical element is opposite a second angle formed by the first planar surface and the third planar surface of the second optical element; wherein the device is configured such that a substantial portion of the first optical element second planar surface is held closely adjacent or in contact with a substantial portion of second optical element second planar surface to both transmit and reflect an optical beam, and such that, in a plane parallel to the first optical triangular planar sides and parallel to the second optical element triangular planar sides, the device has a substantially quadrilateral cross section.