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1. (WO2017149275) CO-ALIGNING LATERALLY DISPLACED RADIATION BEAMS

Pub. No.:    WO/2017/149275    International Application No.:    PCT/GB2017/050462
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Feb 24 00:59:59 CET 2017
IPC: G02B 6/293
G02B 19/00
G02B 27/10
Applicants: BAE SYSTEMS PLC
Inventors: BLANCHARD, Paul, Michael
STACEY, Craig Daniel
Title: CO-ALIGNING LATERALLY DISPLACED RADIATION BEAMS
Abstract:
Apparatus and method are disclosed for co-aligning laterally displaced radiation beams from respective radiation source outputs, each beam comprising a number of spectral components. The apparatus comprises a collimating element for receiving each of said radiation beams with respective lateral displacements and a combining element for receiving each of said radiation beams passed by said collimating element for co-aligning the radiation beams. The apparatus further comprises a diffraction assembly disposed in an optical path between the output of at least one radiation source and the collimating element, for spatially separating the radiation beam output by said at least one radiation source into the constituent spectral components of radiation prior to passing the radiation to the collimating element.