Zobrazeno 1 - 10
of 138
pro vyhledávání: '"Claas Falldorf"'
Publikováno v:
Frontiers in Photonics, Vol 5 (2024)
Externí odkaz:
https://doaj.org/article/f402198693064aee8e3ae060275da4d0
Publikováno v:
Frontiers in Photonics, Vol 5 (2024)
We explore the principles, implementation details, and performance characteristics of a lensless multi-spectral digital holographic sensor and demonstrate its potential for quality assurance in semiconductor manufacturing. The method is based on capt
Externí odkaz:
https://doaj.org/article/69217a92f97b489b9addf8ac8250a6e4
Publikováno v:
Sensors, Vol 24, Iss 10, p 3072 (2024)
We have recently demonstrated that the 3D shape of micro-parts can be measured using LED illumination based on speckle contrast evaluation in the recently developed SPICE profilometry (shape measurements based on imaging with spatially partially cohe
Externí odkaz:
https://doaj.org/article/eef90c7ea853474888c48ffa4a414de0
Autor:
Ulf Schnars, Claas Falldorf
Publikováno v:
Light: Advanced Manufacturing, Vol 3, Pp 1-8 (2022)
The viewing direction in Digital Holography can be varied if different parts of a hologram are reconstructed. In this article parallax limitations are discussed using the phase space formalism. An equation for the parallax angle is derived with this
Externí odkaz:
https://doaj.org/article/86a62561364c49fba64ef8857d690dc2
Publikováno v:
Applied Sciences, Vol 11, Iss 22, p 10533 (2021)
Optical metrology is a key element for many areas of modern production. Preferably, measurements should take place within the production line (in-process) and keep pace with production speed, even if the parts have a complex geometry or are difficult
Externí odkaz:
https://doaj.org/article/a34c22c9ddcc479a8fd8868f05e108ac
Publikováno v:
Photonics, Vol 8, Iss 7, p 247 (2021)
In this paper, we present a multicolor display via referenceless phase holography (RELPH). RELPH permits the display of full optical wave fields (amplitude and phase) using two liquid crystal phase-only spatial light modulators in a Michelson-interfe
Externí odkaz:
https://doaj.org/article/ca70d5e83ed34fc0b4e53a5fa974d5f3
Publikováno v:
Applied Sciences, Vol 9, Iss 18, p 3862 (2019)
We present a novel concept and first experimental results of a new type of 3D display, which is based on the synthesis of spherical waves. The setup comprises a lens array (LA) with apertures in the millimeter range and a liquid crystal display (LCD)
Externí odkaz:
https://doaj.org/article/1a66df07a1ac4e1bb13a12b31c00c859
Autor:
Ralf B. Bergmann, Andreas Fischer, Carsten Bockelmann, Armin Dekorsy, Alberto Garcia-Ortiz, Claas Falldorf
Publikováno v:
tm - Technisches Messen. 89:397-412
The coherence function offers new possibilities for optical metrology that are not available with conventional wave field sensing. Its measurement involves a spatio-temporal sampling of the wave fields modulated by the object under investigation. Tem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0eceb7a3d33b7e704e0b005a1b1df36
https://doi.org/10.1515/teme-2022-0048
https://doi.org/10.1515/teme-2022-0048
Publikováno v:
tm - Technisches Messen. 89:430-437
To determine step heights between a few nanometers and several micrometers, we present a statistical evaluation procedure which overcomes the limitations of the unambiguity range of conventional multi-wavelength interferometry. The experimental setup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cc2302dc5d2593b049d7dd8317c858c
https://doi.org/10.1515/teme-2021-0139
https://doi.org/10.1515/teme-2021-0139
Publikováno v:
Optics express. 30(26)
Today’s 3D dynamic holographic display techniques suffer from severe limitations due to an available number of pixels that is several orders of magnitude lower than required by conventional approaches. We introduce a solution to this problem by int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a568000c9587708abb6793b30cef6829
https://pubmed.ncbi.nlm.nih.gov/36558680
https://pubmed.ncbi.nlm.nih.gov/36558680