Patent ID: 6075913
Filing Date: 2000-06-13
Classification: G02B

Abstract:
An optical element for transferring an optical signal from an entrance region, external to the optical unit, to an exit region, also external to the optical unit, comprising:a first transmitting surface;a second transmitting surface not coplanar with the first transmitting surface;a first surface substantially perpendicular to the first transmitting surface and connecting the first and second transmitting surfaces, a first portion of said first surface being substantially reflective, and a second portion of said first surface being selected from the group consisting of: substantially reflective and less-than-substantially reflective;a second surface substantially perpendicular to the first transmitting surface and connecting the first and second transmitting surfaces, a first portion of said second surface being substantially reflective, and a second portion of said second surface being selected from the group consisting of: substantially reflective and less-than-substantially reflective; anda shaped reflecting surface adjoining the first and second transmitting surfaces.