EP 3655802 A1 20200527 - POLARISATION CONVERTER HAVING REFLECTIVE AXICON LENS
Title (en)
POLARISATION CONVERTER HAVING REFLECTIVE AXICON LENS
Title (de)
POLARISATIONSWANDLER MIT REFLEKTIVER AXIKONOPTIK
Title (fr)
TRANSFORMATEUR DE POLARISATION MUNI D'UN SYSTÈME OPTIQUE AXICON RÉFLÉCHISSANT
Publication
Application
Priority
- DE 102017116477 A 20170721
- EP 2018066188 W 20180619
Abstract (en)
[origin: WO2019015902A1] The invention relates to a polarisation converter (P) comprising a reflective axicon lens (1) as well as at least one half-shaft plate (5, 6). The reflective axicon lens (1) comprises a first hollow axicon (2) having a straight frustoconical recess (2.1) and a first inner axicon (3) arranged concentrically therein and relative to an optical axis (X), wherein the conical recess (2.1) and the inner axicon (3) have the same cone angle (β) and are provided with a polarisation-direction-dependently reflective coating (HR) on the spaced-apart casing surfaces (2.1, 3.1), and with an optically transparent retaining plate (4) arranged perpendicular to the optical axis (X) and having a first flat surface (4.1), on which the base surfaces (2.3, 3.3) of the axicons (2, 3) are arranged in a flush manner, wherein an inlet port (2.2) is arranged at the tip of the frustoconical recess (2.1), concentrically relative to the optical axis (X). The reflective coating (HR) is selected such that, with a beam (S) entering in a collimated manner relative to the optical axis (X), via at least one reflection on each casing surface (2.1, 3.1) of the axicons (2, 3), an overall phase difference of Δφ = N ・π + π/2 between the fast and the slow light propagation direction is brought about on the output side.
IPC 8 full level
G02B 5/00 (2006.01); B23K 26/064 (2014.01); G02B 5/30 (2006.01); G02B 27/09 (2006.01); G02B 27/28 (2006.01)
CPC (source: EP)
B23K 26/0643 (2013.01); B23K 26/0648 (2013.01); B23K 26/0652 (2013.01); B23K 26/082 (2015.10); B23K 26/21 (2015.10); B23K 26/38 (2013.01); B23K 26/703 (2015.10); G02B 5/001 (2013.01); G02B 5/3066 (2013.01); G02B 27/0927 (2013.01); G02B 27/0977 (2013.01); G02B 27/286 (2013.01)
Citation (search report)
See references of WO 2019015902A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019015902 A1 20190124; DE 102017116477 A1 20190124; DE 102017116477 B4 20210819; EP 3655802 A1 20200527
DOCDB simple family (application)
EP 2018066188 W 20180619; DE 102017116477 A 20170721; EP 18733825 A 20180619