Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Theis Faber Quist Iversen"'
Publikováno v:
Hu, Q, Rodrigo, P J, Iversen, T F Q & Pedersen, C 2014, Impact of primary aberrations on coherent lidar performance . in Proceedings of SPIE . vol. 8992, 89920T, SPIE-International Society for Optical Engineering, Proceedings of SPIE-The International Society for Optical Engineering, SPIE Photonics West : Photonic Instrumentation Engineering, San Francisco, California, United States, 01/02/2014 . https://doi.org/10.1117/12.2037179
In this work we investigate the performance of a monostatic coherent lidar system in which the transmit beam is under the influence of primary phase aberrations: spherical aberration (SA) and astigmatism. The experimental investigation is realized by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bade36c448d54bd88c7fb6d7e779da8
https://doi.org/10.1117/12.2037179
https://doi.org/10.1117/12.2037179
Publikováno v:
Rodrigo, P J, Iversen, T F Q, Hu, Q & Pedersen, C 2014, ' Diode laser lidar wind velocity sensor using a liquid-crystal retarder for non-mechanical beam-steering ', Optics Express, vol. 22, no. 22, pp. 26674-26679 . https://doi.org/10.1364/OE.22.026674
We extend the functionality of a low-cost CW diode laser coherent lidar from radial wind speed (scalar) sensing to wind velocity (vector) measurements. Both speed and horizontal direction of the wind at ~80 m remote distance are derived from two succ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f111d1171d2cd7f0d70e1256b3ff3cb6
https://orbit.dtu.dk/en/publications/c90b71dc-94af-494d-a9c1-c94cbdc53055
https://orbit.dtu.dk/en/publications/c90b71dc-94af-494d-a9c1-c94cbdc53055
Publikováno v:
Hu, Q, Rodrigo, P J, Iversen, T F Q & Pedersen, C 2013, ' Investigation of spherical aberration effects on coherent lidar performance ', Optics Express, vol. 21, no. 22, pp. 25670-25676 . https://doi.org/10.1364/OE.21.025670
In this paper we demonstrate experimentally the performance of a monostatic coherent lidar system under the influence of phase aberrations, especially the typically predominant spherical aberration (SA). The performance is evaluated by probing the sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6c7a8b5b41d22d65cf24d37db3ffe30
https://pubmed.ncbi.nlm.nih.gov/24216792
https://pubmed.ncbi.nlm.nih.gov/24216792
Autor:
Steen Hanson, Michael Jakobsen, Theis Faber Quist Iversen, Peter John Rodrigo, Christian Pedersen
Publikováno v:
Hanson, S G, Jakobsen, M L, Iversen, T F Q, Rodrigo, P J & Pedersen, C Feb. 16 2012, Vector velocimeter, Patent No. WO2012019871, IPC No. G01B9/02; G01B9/025; G01S17/58; G01S7/481 .
Technical University of Denmark Orbit
Technical University of Denmark Orbit
The present invention relates to a compact, reliable and low-cost vector velocimeter for example for determining velocities of particles suspended in a gas or fluid flow, or for determining velocity, displacement, rotation, or vibration of a solid su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::12ea5e0b8f8b71e18bcc09905da3fd0f
https://orbit.dtu.dk/en/publications/90b75073-75a1-4ebb-930b-ddccc6b1d83c
https://orbit.dtu.dk/en/publications/90b75073-75a1-4ebb-930b-ddccc6b1d83c
Autor:
Theis Faber Quist Iversen, Steen Grüner Hanson, Michael Linde Jakobsen, Henrik Chresten Pedersen
Publikováno v:
2011 ICO International Conference on Information Photonics.
The use of miniaturized optical sensors as input devices based on speckle phenomena will be discussed alongside with some considerations on the path to industrial implementation.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::841d6cef79b4c512cddec97fd23145bc
https://doi.org/10.1109/ico-ip.2011.5953751
https://doi.org/10.1109/ico-ip.2011.5953751
Publikováno v:
Iversen, T F Q, Jakobsen, M L & Hanson, S G 2011, ' Speckle-based three-dimensional velocity measurement using spatial filtering velocimetry ', Applied Optics, vol. 50, no. 11, pp. 1523-1533 . https://doi.org/10.1364/AO.50.001523
We present an optical method for measuring the real-time three-dimensional (3D) translational velocity of a diffusely scattering rigid object observed through an imaging system. The method is based on a combination of the motion of random speckle pat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21c8f87333ffb0985fbf16ffd1cab45e
https://pubmed.ncbi.nlm.nih.gov/21478924
https://pubmed.ncbi.nlm.nih.gov/21478924
Publikováno v:
Jakobsen, M L, Iversen, T F Q, Yura, H T & Hanson, S G 2011, ' Speckle and fringe dynamics in imagingspeckle-pattern interferometry for spatial-filtering velocimetry ', Applied Optics, vol. 50, no. 28, pp. 5577-5591 . https://doi.org/10.1364/AO.50.005577
This paper analyzes the dynamics of laser speckles and fringes, formed in an imaging-speckle-pattern interferometer with the purpose of sensing linear three-dimensional motion and out-of-plane components of rotation in real time, using optical spatia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d557d7494b25ebd588c8ba7531325785
https://orbit.dtu.dk/en/publications/5df4318b-147b-4801-8c66-515ae1168620
https://orbit.dtu.dk/en/publications/5df4318b-147b-4801-8c66-515ae1168620
Autor:
Steen Grüner Hanson, Morten Mosgaard, Henrik Chresten Pedersen, Theis Faber Quist Iversen, Michael Linde Jakobsen, Jorgen Korsgaard
Publikováno v:
Pedersen, H C, Jakobsen, M L, Hanson, S G, Mosgaard, M, Iversen, T & Korsgaard, J 2011, ' Optical touch screen based on waveguide sensing ', Applied Physics Letters, vol. 99, no. 6, pp. 061102 . https://doi.org/10.1063/1.3615656
We disclose a simple, optical touch screen technique based on a planar injection molded polymer waveguide, a single laser, and a small linear detector array. The solution significantly reduces the complexity and cost as compared to existing optical t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8f4f0eeeb7e8cc191d4ca36c1030ef5
https://orbit.dtu.dk/en/publications/30be3568-ccb6-4a19-93dc-172b777ed2f1
https://orbit.dtu.dk/en/publications/30be3568-ccb6-4a19-93dc-172b777ed2f1
Publikováno v:
Hanson, S G, Iversen, T F Q & Hansen, R S 2010, ' Dynamical properties of speckled speckles ', Proceedings of SPIE-The International Society for Optical Engineering, vol. 7387, pp. 738716 . https://doi.org/10.1117/12.870934
We consider the dynamical properties of speckles observed through a second static diffuser arising from a linear or angularly displaced first diffuser. Analytical expressions are obtained for general situations where both the space between the displa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ba5317a19caac04f3e68bda45c1b981
https://doi.org/10.1117/12.870934
https://doi.org/10.1117/12.870934
Publikováno v:
Optical Sensing and Detection.
The trend in human-machine interface technology is heading towards optical solutions for tracking and movement detection. Especially, interactive touch screens and pads, in which the movement of the user's fingertips is detected and tracked, are of g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75933c2e24fd353267e3ef0444d2b071
https://doi.org/10.1117/12.854599
https://doi.org/10.1117/12.854599