Design problems of a calibrated BRDF sensor with respect to dynamic range, speed, and large angle of view

2000 ◽  
Author(s):  
Thomas Rinder ◽  
Hendrik Rothe ◽  
Andre Kasper
Keyword(s):  
Dynamic Range ◽  
Large Angle ◽  
Design Problems ◽  
Angle Of View

scholarly journals An Augmented Reality Head-Up Display System with a Wide-View Eyebox

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Pei-Jung Wu ◽  
Chih-Hao Chuang ◽  
Chien-Yu Chen ◽  
Jeng-Han Wu ◽  
Bor-Shyh Lin
Keyword(s):  
Large Angle ◽  
Optical Element ◽  
Splitting Function ◽  
Virtual Image ◽  
Projection System ◽  
Image Projection ◽  
Holographic Optical Element ◽  
Angle Of View ◽  
On The Road ◽  
Left Image

This study proposes to apply the combination of two 90-degree prisms and a holographic optical element to an image-dividing element, divide an image into three through the virtual image projection system, and accurately project the images to 160 cm behind the windshield. In order to distinguish the left image, middle image, and right image at the horizontal direction, the 90-degree prism is first utilized for horizontally deflecting the light, a holographic optical element is then used for presenting the vertical deflection of the image, and finally, the images are horizontally arranged as a real image on the diffuser. An image-dividing element is eventually integrated to the virtual image projection system. Then, the divided images are made as a virtual image which is projected to 160 cm behind the windshield to combine with the street scene. The horizontal angle of view of an eyebox is increased from 2.51° to 7.22°, and the size of the eyebox is 31.68 cm × 12.48 cm, allowing a wide-view laser-based head-up display with the large-angle beam-splitting function being successfully designed. It would not affect the field of view on the road, and this system could reduce the space and be arranged easily in a vehicle. Therefore, this proposed system is suitable for the aftermarket.

Reliability of the Flexible Display STN LCD Based Environmental Test

2009 ◽  
Author(s):  
Pan-Dong Fan ◽  
Qiang Miao ◽  
Ping Yang ◽  
Quayle Chen ◽  
Tom Xue ◽  
...  
Keyword(s):  
Failure Modes ◽  
Test Procedure ◽  
Large Angle ◽  
Cold Test ◽  
Electronic Packages ◽  
Practical Application ◽  
Flexible Display ◽  
High Brightness ◽  
Environmental Test ◽  
Angle Of View

In recent years, the application of Flexible Display (FD) is increasing dramatically due to its high brightness, high contrast, and large angle of view. Also because the substrate polymer material is flexible, FD is easily and widely used in various electronic packages. The competition of products based on these technologies such as electronic paper and mobile screen can be improved. In most of these applications, failure of FD can directly lead to failure of device. However, reliability data on FD are not commonly available in published literature, and the reliability of FD in practical application has not been studied very well. This paper presents an experimental study of FD with focus on its reliability under varying temperature and humidity conditions. The purpose of this paper is to investigate the failure mode of FD based on environmental test including steady damp heat test, dry heat test, cyclic damp heat test and cold test. The failure modes are discussed and the analysis is presented. In this study, all tests are conducted with visual inspections during each test procedure.

Insect–Human Hybrid Eye (IHHE): an adaptive optofluidic lens combining the structural characteristics of insect and human eyes

Lab on a Chip ◽  
2014 ◽  
Vol 14 (18) ◽  
pp. 3594-3602 ◽  
Author(s):  
Kang Wei ◽  
Hansong Zeng ◽  
Yi Zhao
Keyword(s):  
Structural Characteristics ◽  
Large Angle ◽  
Compound Eyes ◽  
Angle Of View ◽  
Human Eyes

An optofluidic device named the “Insect–Human Hybrid Eye” (IHHE), which combines the architectural merits of both human camera eyes and insect compound eyes, is presented to implement imaging with a large angle of view and adaptive focusing along any direction within the field.

Photon-nanosieve for ultrabroadband and large-angle-of-view holograms

2017 ◽  
Vol 11 (3) ◽  
pp. 1700025 ◽  
Author(s):  
Kun Huang ◽  
Hong Liu ◽  
Guangyuan Si ◽  
Qian Wang ◽  
Jiao Lin ◽  
...  
Keyword(s):  
Large Angle ◽  
Angle Of View

scholarly journals DisCaaS: Micro Behavior Analysis on Discussion by Camera as a Sensor

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5719
Author(s):  
Ko Watanabe ◽  
Yusuke Soneda ◽  
Yuki Matsuda ◽  
Yugo Nakamura ◽  
Yutaka Arakawa ◽  
...  
Keyword(s):  
High Speed ◽  
Cross Validation ◽  
Dynamic Range ◽  
Group Discussion ◽  
High Dynamic Range ◽  
Video Stream ◽  
High Angle ◽  
Face Images ◽  
High Dynamic ◽  
Angle Of View

The emergence of various types of commercial cameras (compact, high resolution, high angle of view, high speed, and high dynamic range, etc.) has contributed significantly to the understanding of human activities. By taking advantage of the characteristic of a high angle of view, this paper demonstrates a system that recognizes micro-behaviors and a small group discussion with a single 360 degree camera towards quantified meeting analysis. We propose a method that recognizes speaking and nodding, which have often been overlooked in existing research, from a video stream of face images and a random forest classifier. The proposed approach was evaluated on our three datasets. In order to create the first and the second datasets, we asked participants to meet physically: 16 sets of five minutes data from 21 unique participants and seven sets of 10 min meeting data from 12 unique participants. The experimental results showed that our approach could detect speaking and nodding with a macro average f1-score of 67.9% in a 10-fold random split cross-validation and a macro average f1-score of 62.5% in a leave-one-participant-out cross-validation. By considering the increased demand for an online meeting due to the COVID-19 pandemic, we also record faces on a screen that are captured by web cameras as the third dataset and discussed the potential and challenges of applying our ideas to virtual video conferences.

scholarly journals Photonic jets for highly efficient mid-IR focal plane arrays with large angle‐of‐view

2017 ◽  
Vol 25 (25) ◽  
pp. 31174 ◽  
Author(s):  
Farzaneh Abolmaali ◽  
Aaron Brettin ◽  
Andrew Green ◽  
Nicholaos I. Limberopoulos ◽  
Augustine M. Urbas ◽  
...  
Keyword(s):  
Focal Plane ◽  
Large Angle ◽  
Focal Plane Arrays ◽  
Highly Efficient ◽  
Angle Of View

Slow-Scan CCD Observation of Backscattering Patterns in SEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1308-1309
Author(s):  
F. Ouyang ◽  
D. A. Ray ◽  
O. L. Krivanek
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Lens System ◽  
Wide Dynamic Range ◽  
Peltier Cooler ◽  
Diffraction Patterns ◽  
Scanning Electron

Electron backscattering Kikuchi diffraction patterns (BKDP) reveal useful information about the structure and orientation of crystals under study. With the well focused electron beam in a scanning electron microscope (SEM), one can use BKDP as a microanalysis tool. BKDPs have been recorded in SEMs using a phosphor screen coupled to an intensified TV camera through a lens system, and by photographic negatives. With the development of fiber-optically coupled slow scan CCD (SSC) cameras for electron beam imaging, one can take advantage of their high sensitivity and wide dynamic range for observing BKDP in SEM.We have used the Gatan 690 SSC camera to observe backscattering patterns in a JEOL JSM-840A SEM. The CCD sensor has an active area of 13.25 mm × 8.83 mm and 576 × 384 pixels. The camera head, which consists of a single crystal YAG scintillator fiber optically coupled to the CCD chip, is located inside the SEM specimen chamber. The whole camera head is cooled to about -30°C by a Peltier cooler, which permits long integration times (up to 100 seconds).

Sign in / Sign up

Export Citation Format

Share Document