scholarly journals A new holographic display based on conical holography to expand vertical field of view

2021 ◽  
Author(s):  
Zhenxing Zhou ◽  
Jun Wang ◽  
yang wu ◽  
Fengming Jin ◽  
zekun Zhang ◽  
...  
Keyword(s):  
Field Of View ◽  
Holographic Display ◽  
Vertical Field

scholarly journals Technical Note: Regularization performances with the error consistency method in the case of retrieved atmospheric profiles

2006 ◽  
Vol 6 (6) ◽  
pp. 13307-13321
Author(s):  
S. Ceccherini ◽  
C. Belotti ◽  
B. Carli ◽  
P. Raspollini ◽  
M. Ridolfi
Keyword(s):  
Regularization Parameter ◽  
Technical Note ◽  
Field Of View ◽  
Regularization Methods ◽  
Vertical Profiles ◽  
Vertical Resolution ◽  
Vertical Field ◽  
The Stability ◽  
First Time ◽  
Consistency Method

Abstract. The retrieval of concentration vertical profiles of atmospheric constituents from spectroscopic measurements is often an ill-conditioned problem and regularization methods are frequently used to improve its stability. Recently a new method, that provides a good compromise between precision and vertical resolution, was proposed to determine analytically the value of the regularization parameter. This method is applied for the first time to real measurements with its implementation in the operational retrieval code of the satellite limb-emission measurements of the MIPAS instrument and its performances are quantitatively analyzed. The adopted regularization improves the stability of the retrieval providing smooth profiles without major degradation of the vertical resolution. In the analyzed measurements the retrieval procedure provides a vertical resolution that, in the troposphere and low stratosphere, is smaller than the vertical field of view of the instrument.

scholarly journals Simulation study for the Stratospheric Inferred Winds (SIW) sub-millimeter limb sounder

2018 ◽  
Author(s):  
Philippe Baron ◽  
Donal Murtagh ◽  
Patrick Eriksson ◽  
Jana Mendrok ◽  
Satoshi Ochiai ◽  
...  
Keyword(s):  
Simulation Study ◽  
Spectral Band ◽  
Chemical Species ◽  
Field Of View ◽  
Emission Lines ◽  
Horizontal Wind ◽  
Line Of Sight ◽  
Heterodyne Receiver ◽  
Vertical Field ◽  
Wind Measurements

Abstract. Stratospheric Inferred Winds (SIW) is a Swedish mini sub-millimeter limb sounder selected for the 2nd InnoSat platform launch planned near 2022. It is intended to fill the altitude gap between 30–70 km in atmospheric wind measurements and also aims at pursuing the limb observations of temperature and key atmospheric constituents between 10–90 km when current satellite missions are probably stopped. Line-of-sight winds are retrieved from the Doppler shift of the emission lines introduced by 5 the wind field. Observations will be performed with two antennas pointing toward the limb with perpendicular directions to reconstruct the 2-D horizontal wind vector. Each antenna has a vertical field of view of 5 km. The chosen spectral band near 655 GHz contains a dense group of strong O3 lines suitable for exploiting the small wind information in stratospheric spectra. Using both sidebands of the heterodyne receiver, a large number of chemical species will be measured including O3-isopotologues, H2O, HDO, HCl, ClO, N2O, HNO3, NO, NO2, HCN, CH3CN and HO2. This paper presents the simulation study for assessing the measurement performances. The line-of-sight winds are retrieved between 30–90 km with the best sensitivity between 35–70 km where the precision (1-sigma) is 5–10 m s−1 for a single scan. Similar performances can be obtained during day and night conditions except in the lower mesosphere where the photo-dissociation of O3 in day-time reduces the sensitivity by 50 % near 70 km. Profiles of O3, H2O and temperature are retrieved with a high precision up to 50 km (

scholarly journals Enlarging field of view by a two-step method in a near-eye 3D holographic display

2020 ◽  
Vol 28 (22) ◽  
pp. 32709
Author(s):  
Zhiqi Zhang ◽  
Juan Liu ◽  
Xinhui Duan ◽  
Yongtian Wang
Keyword(s):  
Field Of View ◽  
Step Method ◽  
Holographic Display

Holographic display method with a large field of view based on a holographic functional screen

2020 ◽  
Vol 59 (20) ◽  
pp. 5983 ◽  
Author(s):  
Su-Juan Liu ◽  
Di Wang ◽  
Feng-Xiao Zhai ◽  
Nan-Nan Liu ◽  
Qi-Yun Hao
Keyword(s):  
Field Of View ◽  
Large Field ◽  
Holographic Display ◽  
Functional Screen

scholarly journals Spatiotemporal multiplexing method for visual field of view extension in holographic displays with naked eye observation

2016 ◽  
Vol 24 (3) ◽  
Author(s):  
G. Finke ◽  
M. Kujawińska ◽  
T. Kozacki ◽  
W. Zaperty
Keyword(s):  
Visual Field ◽  
Optical System ◽  
Wigner Distribution ◽  
Field Of View ◽  
Distribution Analysis ◽  
Holographic Display ◽  
Holographic Imaging ◽  
Naked Eye ◽  
Holographic Displays ◽  
Functional Problems

AbstractIn this paper we propose a method which allows to overcome the basic functional problems in holographic displays with naked eye observation caused by delivering too small images visible in narrow viewing angles. The solution is based on combining the spatiotemporal multiplexing method with a 4f optical system. It enables to increase an aperture of a holographic display and extend the angular visual field of view. The applicability of the modified display is evidenced by Wigner distribution analysis of holographic imaging with spatiotemporal multiplexing method and by the experiments performed at the display demonstrator.

Large Field-of-View Holographic display by gaplesssplicing of multi-segment cylindrical holograms

2021 ◽  
Author(s):  
Yifan Ma ◽  
Jun Wang ◽  
yang wu ◽  
Fengming Jin ◽  
zekun Zhang ◽  
...  
Keyword(s):  
Field Of View ◽  
Large Field ◽  
Holographic Display
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