Invention Grant
- Patent Title: Segmented birefringent chromatic beam shaping device
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Application No.: US16430948Application Date: 2019-06-04
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Publication No.: US11294109B2Publication Date: 2022-04-05
- Inventor: Johann Engelhardt
- Applicant: Deutsches Krebsforschungszentrum
- Applicant Address: DE Heidelberg
- Assignee: Deutsches Krebsforschungszentrum
- Current Assignee: Deutsches Krebsforschungszentrum
- Current Assignee Address: DE Heidelberg
- Agency: Thomas | Horstemeyer, LLP
- Priority: EP16202295 20161205
- Main IPC: G02B5/18
- IPC: G02B5/18 ; G02B27/10 ; G02B5/30 ; G02B21/00 ; G01N21/64

Abstract:
A segmented birefringent chromatic beam shaping device comprises at least three birefringent chromatic segments arranged side by side in a pupil of the beam shaping device. The birefringent chromatic segments are essentially nλ waveplates at a first design wavelength. At a second design wavelength, the birefringent chromatic segments are essentially (m+1/2)λ waveplates. Each of the birefringent chromatic segments comprises a stack of birefringent elements including at least three chromatic birefringent elements. Orientations of fast axes of each pair of directly consecutive chromatic birefringent elements of each of the birefringent chromatic segments differ by at least 5 deg. The at least three birefringent chromatic segments comprise same sequences of materials, thicknesses and orientations of their birefringent elements so that they only differ is their orientations in the pupil.
Public/Granted literature
- US20190302331A1 SEGMENTED BIREFRINGENT CHROMATIC BEAM SHAPING DEVICE Public/Granted day:2019-10-03
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