scholarly journals Variable Curvature Displays: Optical Designs and Applications for VR/AR/MR Headsets

2020 ◽  
Vol 10 (2) ◽  
pp. 712
Author(s):  
Eduard Muslimov ◽  
Thibault Behaghel ◽  
Emmanuel Hugot ◽  
Kelly Joaquina ◽  
Ilya Guskov
Keyword(s):  
Virtual Reality ◽  
High Resolution ◽  
Field Of View ◽  
Projection System ◽  
Object Position ◽  
Focal Surface ◽  
Variable Curvature ◽  
Starting Point ◽  
Low Distortion ◽  
Aberration Theory

In the present paper, we discuss the design of a projection system with curved display and its enhancement by variably adjusting the curvature. We demonstrate that the focal surface curvature varies significantly with a change of the object position and that it can easily be computed with the Seidel aberration theory. Using this analytically derived curvature value as the starting point, we optimise a refocusable projection system with 90 ° field of view and F / # = 6.2 . It is demonstrated that such a system can provide stable image quality and illumination when refocusing from infinity to 1.5 m. The gain in spatial resolution is as high as 1.54 times with respect to a flat focal surface. Furthermore, we prove that a silicon die can be curved to the required shape with a safety factor of 4.3 in terms of the mechanical stress. Finally, it is shown that the developed system can be used in a virtual reality headset providing high resolution, low distortion and a flexible focusing mode.

scholarly journals AutoScanJ: A Suite of ImageJ Scripts for Intelligent Microscopy

2021 ◽  
Vol 1 ◽  
Author(s):  
Sébastien Tosi ◽  
Anna Lladó ◽  
Lídia Bardia ◽  
Elena Rebollo ◽  
Anna Godo ◽  
...  
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Field Of View ◽  
Live Cells ◽  
Autonomous Operation ◽  
Acquisition Duration ◽  
Starting Point ◽  
Transient Events ◽  
Set Up ◽  
New Applications

We developed AutoscanJ, a suite of ImageJ scripts enabling to image targets of interest by automatically driving a motorized microscope at the corresponding locations. For live samples, our software can sequentially detect biological events from their onset and further image them at high resolution, an action that would be impractical by user operation. For fixed samples, the software can dramatically reduce the amount of data acquired and the acquisition duration in situations where statistically few targets of interest are observed per field of view. AutoScanJ is compatible with motorized fluorescence microscopes controlled by Leica LAS AF/X or Micro-Manager. The software is straightforward to set up and new custom image analysis workflows to detect targets of interest can be simply implemented and shared with minimal efforts as independent ImageJ macro functions. We illustrate five different application scenarios with the system ranging from samples fixed on micropatterned surfaces to live cells undergoing several rounds of division. The target detection functions for these applications are provided and can be used as a starting point and a source of inspiration for new applications. Overall, AutoScanJ helps to optimize microscope usage by autonomous operation, and it opens up new experimental avenues by enabling the real-time detection and selective imaging of transient events in live microscopy.

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

High Resolution Specimen Area Imaged Under Negligible Field Aberrations

1970 ◽  
Vol 28 ◽  
pp. 540-541 ◽  
Author(s):  
T. Yanaka ◽  
K. Shirota
Keyword(s):  
High Resolution ◽  
Field Distribution ◽  
Image Space ◽  
Beam Deflection ◽  
Objective Lens ◽  
Resolution Limit ◽  
Leakage Flux ◽  
Specimen Area ◽  
Points Of View ◽  
Aberration Theory

It is significant to note field aberrations (chromatic field aberration, coma, astigmatism and blurring due to curvature of field, defined by Glaser's aberration theory relative to the Blenden Freien System) of the objective lens in connection with the following three points of view; field aberrations increase as the resolution of the axial point improves by increasing the lens excitation (k2) and decreasing the half width value (d) of the axial lens field distribution; when one or all of the imaging lenses have axial imperfections such as beam deflection in image space by the asymmetrical magnetic leakage flux, the apparent axial point has field aberrations which prevent the theoretical resolution limit from being obtained.

A High Resolution Scanning Microscope

1968 ◽  
Vol 26 ◽  
pp. 356-357
Author(s):  
A. V. Crewe ◽  
J. Wall ◽  
L. M. Welter
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Spherical Aberration ◽  
Focal Length ◽  
Spot Size ◽  
Emission Source ◽  
Field Of View ◽  
Scanning Microscope ◽  
Magnetic Lens ◽  
High Quality

A scanning microscope using a field emission source has been described elsewhere. This microscope has now been improved by replacing the single magnetic lens with a high quality lens of the type described by Ruska. This lens has a focal length of 1 mm and a spherical aberration coefficient of 0.5 mm. The final spot size, and therefore the microscope resolution, is limited by the aberration of this lens to about 6 Å.The lens has been constructed very carefully, maintaining a tolerance of + 1 μ on all critical surfaces. The gun is prealigned on the lens to form a compact unit. The only mechanical adjustments are those which control the specimen and the tip positions. The microscope can be used in two modes. With the lens off and the gun focused on the specimen, the resolution is 250 Å over an undistorted field of view of 2 mm. With the lens on,the resolution is 20 Å or better over a field of view of 40 microns. The magnification can be accurately varied by attenuating the raster current.

A high-resolution wide-screen display for simulators and virtual reality

2004 ◽  
Author(s):  
Vaibhav Govil ◽  
Stacy Lovell ◽  
Piriyakala Suresh ◽  
Qiong Wu ◽  
Guihua Yang ◽  
...  
Keyword(s):  
Virtual Reality ◽  
High Resolution

Two-panel LCOS-based projection system: a potentially compact high-resolution avionics display

2003 ◽  
Author(s):  
Gary D. Sharp ◽  
Jianmin Chen ◽  
Michael B. Robinson ◽  
John K. Korah
Keyword(s):  
High Resolution ◽  
Projection System ◽  
System A

THE CONTRIBUTION OF VIRTUAL REALITY TECHNOLOGY IN THE DEVELOPMENT TOURISM IN YOGYAKARTA

Pringgitan ◽  
2021 ◽  
Vol 2 (01) ◽  
Author(s):  
Muhammad Syaifulloh ◽  
Safor Mardianto
Keyword(s):  
Virtual Reality ◽  
Literature Review ◽  
Significant Contribution ◽  
Tourism Industry ◽  
Virtual Reality Technology ◽  
Aviation Medicine ◽  
Tourism Sector ◽  
Starting Point ◽  
The Republic ◽  
Staying At Home

Tourism sector provides a significant contribution to the Gross Domestic Product (GDP) of the Republic of Indonesia, both through foreign exchange and economic turnover. Although the Indonesian tourism industry after the COVID-19 pandemic has changed with an emphasis on green and clean products, it is hoped that this sector will be lessened by the community compared to the previous era. Research and development of VR has been carried out in various fields such as games, education, aviation, medicine, the application of VR in tourism is still common, there is a need to implement tourism while staying at home. The results of the systematic literature review conducted provide an explanation of the starting point for research by applying VR and making 3600 videos for industrial tourism. Keywords: Environmental Tourism, Virtual Tour, Virtual Reality, Video

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