Patent ID: 8238029
Filing Date: 2012-08-07
Classification: G02B,H04N

Abstract:
1. An apparatus, comprising: a dichroic optic having a first side, a second side opposite to the first side, and a third side nonparallel to the first side and nonparallel to the second side, wherein the second side has an optical filter, wherein each of a light beam having a first wavelength, a light beam having a second wavelength and a light beam having a third wavelength enter, exit or reflect from the dichroic optic from at least one of the first or second sides, and only exit from the third side, and wherein prior to incidence on the dichroic optic each of the light beams having the first, second or third wavelengths are non-collinear with each other; wherein the light beam having the first wavelength and the light beam having the second wavelength are substantially collinear in a first internal beam within the dichroic optic; wherein the optical filter has a response capable of transmitting a first portion of the light beam having the first wavelength and a first portion of the light beam having the second wavelength, while reflecting second portions of the light beams having the first and second wavelengths, and reflecting a first portion of the light beam having the third wavelength, while transmitting a second portion of the light beam having the third wavelength; wherein the first portion of the light beam having the first wavelength, the first portion of the light beam having the second wavelength, and the first portion of the light beam having the third wavelength are combined in a substantially collinear manner while emanating from the dichroic optic at the optical filter; and wherein the second portions of the light beams having first, second, and third wavelengths are substantially collinear in a second internal beam that exits the dichroic optic at the third side as a pickoff beam.