Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Lauri Hallman"'
Publikováno v:
IEEE Photonics Journal, Vol 16, Iss 2, Pp 1-7 (2024)
A solid-state three-dimensional (3-D) range imager using the pulsed time-of-flight principle and a single photon avalanche diode (SPAD) based receiver is demonstrated. Contrary to conventional flood illumination, the suggested system uses sequentiall
Externí odkaz:
https://doaj.org/article/cb891b64adc04fa58de1680bc8424ee7
Autor:
Juha Kostamovaara, Sahba Jahromi, Lauri Hallman, Guoyong Duan, Jussi-Pekka Jansson, Pekka Keranen
Publikováno v:
IEEE Photonics Journal, Vol 14, Iss 2, Pp 1-11 (2022)
Full realization of a solid-state 3-D range imager based on the pulsed time-of-flight method is presented. The system uses block-based segmented illumination in the transmitter realized with a 16-element common anode laser diode bar. The receiver is
Externí odkaz:
https://doaj.org/article/7db222db7816471191b5186a80b2b386
Autor:
Juha Kostamovaara, Jaakko Huikari, Lauri Hallman, Ilkka Nissinen, Jan Nissinen, Harri Rapakko, Eugene Avrutin, Boris Ryvkin
Publikováno v:
IEEE Photonics Journal, Vol 7, Iss 2, Pp 1-15 (2015)
This paper discusses the construction principles and performance of a pulsed time-of-flight (TOF) laser radar based on high-speed (FWHM ~100 ps) and high-energy (~1 nJ) optical transmitter pulses produced with a specific laser diode working in an “
Externí odkaz:
https://doaj.org/article/cd6f89e502fa4b779b347fa418b5a20b
Autor:
Ilpo Niskanen, Matti Immonen, Lauri Hallman, Martti Mikkonen, Visa Hokkanen, Takeshi Hashimoto, Juha Kostamovaara, Rauno Heikkilä
Publikováno v:
Journal of Transportation Engineering, Part B: Pavements. 149
Construction materials and related management, handling, and storage provisions account for a large portion of road construction expenses. For that reason, improved material flow monitoring techniques can achieve significant cost and time savings, as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32ff0f1b7ae8aa007ada19f2571f5af7
https://doi.org/10.1061/jpeodx.pveng-1149
https://doi.org/10.1061/jpeodx.pveng-1149
Autor:
Ilpo Niskanen, Matti Immonen, Tomi Makkonen, Lauri Hallman, Martti Mikkonen, Pekka Keränen, Juha Kostamovaara, Rauno Heikkilä
Publikováno v:
Journal of Visualization.
Abstract Real-time, three-dimensional (3D) visualisation technology can be used at construction sites to improve the quality of work. A 3D view of the landscape under work can be compared to a target 3D model of the landscape to conveniently show nee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::417dfb60c4e0d5c8b845de448718066f
https://doi.org/10.1007/s12650-023-00908-4
https://doi.org/10.1007/s12650-023-00908-4
Autor:
Ilpo Niskanen, Lauri Hallman, Pekka Keranen, Juha Kostamovaara, Rauno Heikkilä, Mikko Hiltunen, Matti Immonen
Publikováno v:
IEEE Sensors Journal. 21:17200-17206
The research aimed to integrate a solid-state 2D-pulsed time-of-flight (TOF) flash Lidar profilometer and a mechanically scanning 3D Lidar in order to monitor the 4D (3D + signal intensity) environment at a construction site from an excavator. Utiliz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4862720f903970636ec6dbdf8c7732cd
https://doi.org/10.1109/jsen.2021.3078301
https://doi.org/10.1109/jsen.2021.3078301
Publikováno v:
Electronics Letters, Vol 57, Iss 23, Pp 891-893 (2021)
The experimental characterization of a high‐power pulsed semiconductor laser operating in the eye‐safe spectral range (wavelength around 1.5 μm), with an asymmetric waveguide structure, a 100 μm wide stripe, and a bulk active layer positioned v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65744bbe7eb8c8eb26eb976a4c614edd
https://doi.org/10.1049/ell2.12298
https://doi.org/10.1049/ell2.12298
Autor:
Lauri Hallman, Jukka Viheriälä, Juha Kostamovaara, Boris S. Ryvkin, Antti T. Aho, Eugene A. Avrutin, Mircea Guina
Publikováno v:
IEEE Photonics Technology Letters. 31:1635-1638
We report first experimental results on a high-power pulsed semiconductor laser operating in the eye-safe spectral range (wavelength around $1.5~\mu \text{m}$ ) with an asymmetric waveguide structure. The laser has a bulk active layer positioned very
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40cb2b62dbca4ded9352b1a0e8382d14
https://doi.org/10.1109/lpt.2019.2940231
https://doi.org/10.1109/lpt.2019.2940231
Publikováno v:
IEEE Journal of Solid-State Circuits. 54:501-510
A CMOS solid-state 3-D range imager that uses short (~110 ps) laser pulses and a novel flexible time gating scheme for a single-photon avalanche diode (SPAD) array is presented. The array is divided into 40 subarrays for which a narrow ( $80\times25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a02e3c2a4424d3f00ecd64943376f00
https://doi.org/10.1109/jssc.2018.2878816
https://doi.org/10.1109/jssc.2018.2878816
Publikováno v:
ICTON
InGaAsP/InP high pulsed power lasers operating in the range of $1.3 - 1.6\ \mu \mathrm{m}$ have been intensely studied recently, with LIDAR technology being the primary application. We present and analyse a design with a bulk active layer which has a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94bbfd04babdc5bb46ec9683f9ebe0d7
https://doi.org/10.1109/icton51198.2020.9203550
https://doi.org/10.1109/icton51198.2020.9203550