Advanced processing of astronomical images obtained from optical systems with ultra wide field of view

2009 ◽  
Author(s):  
Martin Rerabek ◽  
Petr Páta
Keyword(s):  
Field Of View ◽  
Optical Systems ◽  
Wide Field ◽  
Wide Field Of View ◽  
Astronomical Images

scholarly journals Condition of Optical Systems Independent of Frequency for Wide Field-of-View Radio Telescopes

2015 ◽  
Vol 5 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Hiroaki Imada ◽  
Makoto Nagai ◽  
Masaru Kino ◽  
Masumichi Seta ◽  
Shun Ishii ◽  
...  
Keyword(s):  
Field Of View ◽  
Optical Systems ◽  
Wide Field ◽  
Radio Telescopes ◽  
Wide Field Of View

scholarly journals Near-IR wide-field-of-view Huygens metalens for outdoor imaging applications

Nanophotonics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 361-370 ◽  
Author(s):  
Jacob Engelberg ◽  
Chen Zhou ◽  
Noa Mazurski ◽  
Jonathan Bar-David ◽  
Anders Kristensen ◽  
...  
Keyword(s):  
Near Infrared ◽  
Field Of View ◽  
Optical Systems ◽  
Successful Implementation ◽  
Wide Field ◽  
Optical Surface ◽  
Near Ir ◽  
Ongoing Effort ◽  
Good Imaging ◽  
Wide Field Of View

AbstractThe ongoing effort to implement compact and cheap optical systems is the main driving force for the recent flourishing research in the field of optical metalenses. Metalenses are a type of metasurface, used for focusing and imaging applications, and are implemented based on the nanopatterning of an optical surface. The challenge faced by metalens research is to reach high levels of performance using simple fabrication methods suitable for mass production. In this paper, we present a Huygens nanoantenna-based metalens, designed for outdoor photographic/surveillance applications in the near infrared. We show that good imaging quality can be obtained over a field of view as large as ±15°. This first successful implementation of metalenses for outdoor imaging applications is expected to provide insight and inspiration for future metalens imaging applications.

High-aperture and wide-field-of-view optical systems: a case study

1996 ◽  
Author(s):  
Andrea Zuin ◽  
Cesare Gadda ◽  
V. Leone ◽  
Vincenzo Greco ◽  
Giuseppe Molesini
Keyword(s):  
Field Of View ◽  
Optical Systems ◽  
Wide Field ◽  
Wide Field Of View

scholarly journals On the functions of double eyes in midwater animals

2000 ◽  
Vol 355 (1401) ◽  
pp. 1147-1150 ◽  
Author(s):  
Michael F. Land
Keyword(s):  
High Resolution ◽  
Field Of View ◽  
Optical Systems ◽  
Compound Eyes ◽  
Wide Field ◽  
Background Light ◽  
Light Levels ◽  
Wide Field Of View ◽  
Silhouette Detection ◽  
Luminescence Detectors

Midwater predators often have double eyes consisting of a large upward–pointing part with a narrow field of view and high resolution, and a small downward–pointing part with a wide field of view and low resolution. In crustaceans with compound eyes the different eye parts are of basically similar construction, but in fishes the downward–pointing regions may employ unusual optical systems with unknown image–forming capabilities. It has been suggested that the upward–directed parts are used to detect silhouettes of animals against the residual daylight, whereas the lower parts look out for luminescent organisms. Here I calculate the sizes that apposition compound eyes would need to attain in order to fulfil these tasks, and the way that size should vary with depth. It is concluded that silhouette detection is much the more demanding task, and becomes increasingly difficult as light levels decrease. For this reason the upward–pointing parts must increase rapidly with depth. This is not the case with luminescence detectors, where the task is most difficult near the surface because of upwelling background light, and becomes easier with depth. On the whole these predictions fit well with the sizes and shapes of real midwater eyes, especially in the case of the hyperiid amphipods.

STM studies of crystal growth

1991 ◽  
Vol 49 ◽  
pp. 374-375
Author(s):  
M. G. Lagally
Keyword(s):  
Crystal Growth ◽  
Molecular Beam ◽  
Chemical Vapor ◽  
Sputter Deposition ◽  
Field Of View ◽  
Scanning Tunneling ◽  
Wide Field ◽  
Tunneling Microscopy ◽  
Wide Field Of View ◽  
The One

It has been recognized since the earliest days of crystal growth that kinetic processes of all Kinds control the nature of the growth. As the technology of crystal growth has become ever more refined, with the advent of such atomistic processes as molecular beam epitaxy, chemical vapor deposition, sputter deposition, and plasma enhanced techniques for the creation of “crystals” as little as one or a few atomic layers thick, multilayer structures, and novel materials combinations, the need to understand the mechanisms controlling the growth process is becoming more critical. Unfortunately, available techniques have not lent themselves well to obtaining a truly microscopic picture of such processes. Because of its atomic resolution on the one hand, and the achievable wide field of view on the other (of the order of micrometers) scanning tunneling microscopy (STM) gives us this opportunity. In this talk, we briefly review the types of growth kinetics measurements that can be made using STM. The use of STM for studies of kinetics is one of the more recent applications of what is itself still a very young field.

Design and verification of high-precision multi-star simulator with a wide field of view

2020 ◽  
Vol 13 (6) ◽  
pp. 1-9
Author(s):  
XU Hong-gang ◽  
◽  
HAN Bing ◽  
LI Man-li ◽  
MA Hong-tao ◽  
...  
Keyword(s):  
High Precision ◽  
Field Of View ◽  
Wide Field ◽  
Wide Field Of View

Fabrication of bioinspired omnidirectional and gapless microlens array for wide field-of-view detections

2012 ◽  
Vol 100 (13) ◽  
pp. 133701 ◽  
Author(s):  
Hewei Liu ◽  
Feng Chen ◽  
Qing Yang ◽  
Pubo Qu ◽  
Shengguan He ◽  
...  
Keyword(s):  
Microlens Array ◽  
Field Of View ◽  
Wide Field ◽  
Wide Field Of View
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