Patent ID: 7869133

Claim:
An optical system for transforming a non-circular laser beam from a laser to a polarized differently-shaped laser symmetric beam, comprising: a first optical component comprising a first input surface for receiving a laser beam and a first exit surface through which the laser beam is emitted; and a second optical component comprising a second input surface aligned to receive the laser beam emitted from the first optical component and a second exit surface through which the laser beam is emitted, wherein the first and second optical components are structured to transform a lateral dimension of the laser beam as it propagates through the first and second optical components so that the shape of the output laser beam emitted from the second optical component is more circularly symmetrical than the input laser beam, wherein at least one of the input and output surfaces of the first or second optical components is coated with a polarization selective coating, and wherein the configuration of the first optical component, the second optical component, and the polarization selective coating produce a polarization ratio of about 100:1 or higher for the output laser beam exiting the second optical component.