Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Jan Liesener"'
Publikováno v:
Optics Communications. 233:161-166
The performance of an optical system depends on its aberrations. One way to reduce aberrations is a careful a priori optimization of the lens design. For a given system the introduction of a compensation hologram can lead to a perfect system. For thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c57d2c0f8b8163846be136368deb7306
https://doi.org/10.1016/j.optcom.2004.01.029
https://doi.org/10.1016/j.optcom.2004.01.029
Publikováno v:
Optics Communications. 185:77-82
Optical tweezers are capable of trapping microscopic particles by photon momentum transfer. The use of dynamic computer-generated holograms for beam shaping allows a high flexibility in terms of trap characteristics and features. We use a liquid crys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::432573ab4668d0e9d49cf9f419c61bb5
https://doi.org/10.1016/s0030-4018(00)00990-1
https://doi.org/10.1016/s0030-4018(00)00990-1
Publikováno v:
Fringe 2009 ISBN: 9783642030505
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25200555f06a300823b23715abf784c1
https://doi.org/10.1007/978-3-642-03051-2_40
https://doi.org/10.1007/978-3-642-03051-2_40
Publikováno v:
SPIE Proceedings.
A new interferometric technique for the measurement of aspheric elements based on multiple test beams is presented. By means of an array of sources (Point Source Array) an aspheric surface is illuminated under different angles which allow the measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::535bc720ef72ddf3baff545af8196f52
https://doi.org/10.1117/12.727898
https://doi.org/10.1117/12.727898
Autor:
Jan Liesener, Wolfgang Osten
Publikováno v:
Fringe 2005 ISBN: 3540260374
With the given micromirror array several wavefront optimization methods could be applied that enabled a greatly improved fiber coupling efficiency. The improvement was especially significant for the piston type MMA.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5cf9b43e0f97518415b97d091c23555b
https://doi.org/10.1007/3-540-29303-5_17
https://doi.org/10.1007/3-540-29303-5_17
Publikováno v:
Eighth International Symposium on Laser Metrology.
Active and adaptive optics are becoming more important in the field of beam shaping and wave front analysis. One of the main reasons for the progress and recent activities in active optics is the availability of new active elements like deformable mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c17bb0ba4593d1c1f2745aa9f69dadb
https://doi.org/10.1117/12.611626
https://doi.org/10.1117/12.611626
Publikováno v:
SPIE Proceedings.
Micro Mirror Arrays (MMAs) offer the potential of a high spatial and temporal resolution technology for wavefront control applications. In this paper a new Micro-Electro-Mechanical-System (MEMS) based MMA type is investigated. As opposed to most othe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d7674675c6fa7bd8921aa6f52659a3a
https://doi.org/10.1117/12.558679
https://doi.org/10.1117/12.558679
Autor:
Jan Liesener, Hans J. Tiziani
Publikováno v:
SPIE Proceedings.
Interferometric testing of optical surfaces is problematic when strong asphericities are present. The spatial frequencies of the interference fringes exceed the detector resolution where the slope difference between test beam and reference beam is to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8805243248a9499a41084b68d9f621ae
https://doi.org/10.1117/12.513399
https://doi.org/10.1117/12.513399
Publikováno v:
Optical Information Systems.
Spatial light modulators are of growing interest not only for optical correlators but also for new optical measurement and processing methods. We present different applications of dynamic phase holograms based on liquid crystal elements in the field
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c92b8dff462503cbdd76ae4dd23c5826
https://doi.org/10.1117/12.501511
https://doi.org/10.1117/12.501511
Publikováno v:
SPIE Proceedings.
We present a new type of Shack-Hartmann sensor. Replacing the static microlens array in a Shack-Hartmann sensor by a liquid crystal display results in a greater measurement flexibility. The liquid-crystal display in the adaptive Shack-Hartmann Sensor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af023316c1025f7d3a1047537c747f76
https://doi.org/10.1117/12.499543
https://doi.org/10.1117/12.499543