Open AccessCommon-path interferometer with diffractive lens
Author(s) -
Henna Elfström,
Anni Lehmuskero,
Toni Saastamoinen,
Markku Kuittinen,
Pasi Vahimaa
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.003847
Subject(s) - optics , interferometry , lens (geology) , diffraction efficiency , diffraction , optical path , millimeter , optical path length , beam (structure) , physics , materials science
We introduce a novel common-path interferometric measurement setup for optical quality testing. The setup is based on an optimized diffractive lens which produces two diffraction orders with equal efficiency and thus forms two interfering beams without any beam splitting or mirror alignments. The fabrication steps of the diffractive element are presented and the testing of the setup with injection molded millimeter scale lenses is briefly discussed.