Patent ID: 6426838
Filing Date: 2002-07-30
Classification: G02B,G06K

Abstract:
A multifocal optical element comprising:a light source; and an optical element having a first optical surface and a second optical surface, said first optical surface having a polarization coating thereon reflecting a first polarization of light and transmitting a second polarization of light from said light source, said second optical surface intersecting said second polarization of light transmitting through said first optical surface, wherein said second optical surface has a reflective portion to reflect a portion of said second polarization of light back through said first optical surface and a non-reflective portion that does not reflect said second polarization of light that is not reflected by said reflective portion; wherein said first optical surface and said second optical surface have different reflective properties to create different beams, wherein said first optical surface reflects said first polarization of light with different optical power than said second optical surface reflecting said second polarization of light.