Results 91 to 100 of about 43,863 (306)

Characterization of an Optical Transfer Function–based Phasing Technique for India’s Large Segmented Mirror Telescope

open access: yesThe Astronomical Journal
The upcoming 10 m class large Indian telescope is proposed to be built using segmented mirror technology. To achieve diffraction-limited image quality with a segmented mirror telescope, it is important to phase mirror segments with very high precision ...
Radhika Dharmadhikari, Padmakar Parihar
doaj   +1 more source

Germanium‐Based Mid‐Infrared Integrated Photonics

open access: yesLaser &Photonics Reviews, EarlyView.
The mid‐infrared (mid‐IR) spectral range is a part of the electromagnetic spectrum in which most of the molecules have vibrational and rotational resonances. Photonics integration in this wavelength range have thus seen a burst of interest in the recent years, mainly driven by applications related with the detection of chemical and biological ...
Delphine Marris‐Morini   +6 more
wiley   +1 more source

The balloon-borne large-aperture submillimeter telescope for polarization: BLAST-pol [PDF]

open access: yes, 2008
The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a sub-orbital experiment designed to study the process of star formation in local galaxies (including the Milky Way) and in galaxies at cosmological distances.
David Hughes
core  

On doing cosmology with a large optical telescope

open access: yes, 1991
This paper highlights the interesting problems in cosmology that require observational inputs normally available from optical telescopes in the 4 - 6 m ...
Narlikar, J. V.
core   +1 more source

Challenges in Identifying Artificial Objects in the Near-Earth Object Population: Spectral Characterization of 2020 SO

open access: yesThe Planetary Science Journal
Since the dawn of the Space Age, hundreds of payloads have been launched into heliocentric space. As near-Earth object (NEO) surveys search deeper for small asteroids, more artificial objects in heliocentric orbits are being discovered.
Adam Battle   +15 more
doaj   +1 more source

Optical Skyrmions with Tunable or Reconfigurable Topology Using Spin‐Decoupled Metaoptics

open access: yesLaser &Photonics Reviews, EarlyView.
The work introduces advanced optical elements capable of generating and dynamically reconfiguring complex light patterns known as optical skyrmions. By precisely shaping light polarization at the nanoscale, a single engineered metasurface can generate and manipulate robust and tunable polarization textures in an efficient and scalable way.
Andrea Vogliardi   +5 more
wiley   +1 more source

LINC-NIRVANA Commissioning at the Large Binocular Telescope - Lessons Learned [PDF]

open access: yes, 2019
LINC-NIRVANA (LN) is one of the instruments on-board the Large Binocular Telescope (LBT). LN is a high- resolution, near-infrared imager equipped with an advanced adaptive optics module. LN implements layer- oriented Multi-Conjugate Adaptive Optics (MCAO)
RADHAKRISHNAN SANTHAKUMARI, KALYAN KUMAR   +13 more
core  

Artificial Intelligence in Astronomical Optical Telescopes: Present Status and Future Perspectives

open access: yesUniverse
With new artificial intelligence (AI) technologies and application scenarios constantly emerging, AI technology has become widely used in astronomy and has promoted notable progress in related fields.
Kang Huang   +8 more
doaj   +1 more source

Deterministic Fiber‐Optic Spectral Engineering Enables Three‐Color Multiplexed Two‐Photon Microscopy

open access: yesLaser &Photonics Reviews, EarlyView.
A simulation‐guided spectral‐engineering framework maps the nonlinear parameter space of a fiber laser platform to identify balanced three‐band excitation states. The resulting 960, 1080, and 1175 nm femtosecond pulses deliver nJ‐level energies for low‐cross‐talk chromatically multiplexed two‐photon microscopy.
Marvin Edelmann   +5 more
wiley   +1 more source

Optimising the NAOMI adaptive optics real-time control system [PDF]

open access: yes, 2008
This thesis describes the author's research in the field of Real-Time Control (RTC) for Adaptive Optics (AO) instrumentation. The research encompasses experiences and knowledge gained working in the area of RTC on astronomical instrumentation projects ...
Goodsell, S. J., Goodsell, S J
core  

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