TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Multiwavelength surface contouring from phase-coded diffraction patterns

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoUnconventional Optical Imaging 2018. Strasbourg, France
KustantajaSPIE
Vuosikerta10677
ISBN (painettu)978-1-5106-1880-0
DOI - pysyväislinkit
TilaJulkaistu - 1 tammikuuta 2018
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaUnconventional Optical Imaging -
Kesto: 1 tammikuuta 2000 → …

Julkaisusarja

NimiProceedings of SPIE - The International Society for Optical Engineering
Vuosikerta10677
ISSN (elektroninen)0277-786X

Conference

ConferenceUnconventional Optical Imaging
Ajanjakso1/01/00 → …

Tiivistelmä

We propose a new algorithm for absolute phase retrieval from multiwavelength noisy phase coded diffraction patterns in the task of surface contouring. A lensless optical setup is considered with a set of successive single wavelength experiments. The phase masks are applied for modulation of the multiwavelength object wavefronts. The algorithm uses the forward and backward propagation for coherent light beams and sparsely encoding wavefronts which leads to the complex-domain block-matching 3D filtering. The key-element of the algorithm is an original aggregation of the multiwavelength object wavefronts for high-dynamic-range profile measurement. Numerical experiments demonstrate that the developed approach leads to the effective solutions explicitly using the sparsity for noise suppression and high-accuracy object profile reconstruction.