Patent ID: 6122106
Filing Date: 2000-09-19
Classification: G01S,G02B

Abstract:
An opto-mechanical system comprising:a Galilean telescope beam expander including a large-aperture objective lens and a negative lens defining an associated optical axis, for receiving a large-aperture beam and first and second small aperture beams; anda beamsplitter for separating said large-aperture beam from said optical axis after said large-aperture beam has entered said objective lens and has exited from said negative lens,wherein said large aperture beam has a first wavelength and propagates in an in-coming direction along said optical axis;said first small-aperture beam has said first wavelength and propagates in an out-going direction opposite to said incoming direction, such that said first small-aperture beam is displaced from said optical axis and is transmitted from the negative lens to the objective lens through a first peripheral portion of said Galilean telescope beam expander; andsaid second small-aperture beam has a second wavelength different from said first wavelength and also propagates in said out-going direction, such that the second small-aperture beam is displaced from said optical axis and from said first small-aperture beam and is transmitted through a second peripheral portion of said Galilean telescope beam expander remote from said first peripheral portion; andwherein a respective external portion of each said small-aperture beam out-going from said large-aperture objective lens are both essentially parallel to an external portion of said large-aperture beam incoming to said objective lens.