Design requirements for high-sensitivity UV solar blind imaging detectors based on AlGaN/GaN photodetector arrays: a review

2001 ◽  
Author(s):  
Cole W. Litton ◽  
P. J. Schreiber ◽  
Gary A. Smith ◽  
Tuoc Dang ◽  
Hadis Morkoc
Keyword(s):  
High Sensitivity ◽  
Solar Blind ◽  
Imaging Detectors ◽  
Design Requirements ◽  
Photodetector Arrays

Ga2O3 photodetector arrays for solar-blind imaging

2019 ◽  
Vol 7 (9) ◽  
pp. 2557-2562 ◽  
Author(s):  
Yan-Cheng Chen ◽  
Ying-Jie Lu ◽  
Qian Liu ◽  
Chao-Nan Lin ◽  
Juan Guo ◽  
...  
Keyword(s):  
Photodetector Array ◽  
Solar Blind ◽  
Photodetector Arrays

A multi-channel Ga2O3 photodetector array with 16 cells was fabricated to realize solar-blind imaging.

scholarly journals Analysis and Reduction of Solar Stray Light in the Nighttime Imaging Camera of Luojia-1 Satellite

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1130 ◽  
Author(s):  
Xing Zhong ◽  
Zhiqiang Su ◽  
Guo Zhang ◽  
Zhigang Chen ◽  
Yao Meng ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Light Signal ◽  
Stray Light ◽  
Direct Sunlight ◽  
Detection Failure ◽  
Imaging Camera ◽  
Secondary Scattering ◽  
Order Of Magnitude ◽  
Nighttime Light ◽  
Design Requirements

As one of the experimental payloads on Luojia-1 satellite, the nighttime imaging camera works with a high sensitivity to acquire nighttime light on earth. Solar stray light is a fatal problem for optical satellite works in the polar orbit, even for nighttime scene imaging, resulting in image saturation and light signal detection failure. To solve this problem, an analysis of the range of solar incident angles was conducted firstly. Based on the result, a special-shaped baffle was designed to avoid direct sunlight incidence. Moreover, the capability of stray light elimination of the lens was enhanced by an order of magnitude via optimizing the internal structure. An evaluation of secondary scattering stray lights into the camera from surrounding parts was performed based on a real satellite model. The results showed that the stray light elimination reaches a 10−10 order, meeting design requirements. Utilizing on-orbit images, the ability of satellites in illuminated areas to obtain artificial lights in dawn-dusk area was verified, proving the effectiveness of the stray light elimination design.

scholarly journals High Sensitive Night-time Light Imaging Camera Design and In-orbit Test of Luojia1-01 Satellite

Sensors ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 797 ◽  
Author(s):  
Zhiqiang Su ◽  
Xing Zhong ◽  
Guo Zhang ◽  
Yanjie Li ◽  
Xiaojun He ◽  
...  
Keyword(s):  
Integrated Design ◽  
Remote Sensing Data ◽  
High Sensitivity ◽  
Stray Light ◽  
Modulation Transfer ◽  
Night Time ◽  
Camera Design ◽  
Design Requirements ◽  
Imaging Performance ◽  
Better Than

Luojia1-01 satellite is the first scientific experimental satellite applied for night-time light remote sensing data acquisition, and the payload is an optical camera with high sensitivity, high radiation measurement accuracy and stable elements of interior orientation. At the same time, a special shaped hood is designed, which significantly improved the ability of the camera to suppress stray light. Camera electronics adopts the integrated design of focal plane and imaging processing, which greatly reduces the volume and weight of the system. In this paper, the design of the optical camera is summarized, and the results of in-orbit imaging performance tests are analyzed. The results show that the dynamic modulation transfer function (MTF) of the camera is better than 0.17, and the SNR is better than 35 dB under the condition of 10 lx illuminance and 0.3 reflectivity and all indicators meet the design requirements. The data obtained have been widely applied in many fields such as the process of urbanization, light pollution analysis, marine fisheries detection and military.

Configuration of ring-down spectrometers for maximum sensitivity

2004 ◽  
Vol 82 (6) ◽  
pp. 873-879 ◽  
Author(s):  
Michael Jakubinek ◽  
Zhaoguo Tong ◽  
Sergei Manzhos ◽  
Hans-Peter Loock
Keyword(s):  
Detection Limit ◽  
Gas Phase ◽  
Cavity Length ◽  
High Sensitivity ◽  
Relative Sensitivity ◽  
Time Measurement ◽  
Design Requirements ◽  
Loop Ring ◽  
Cavity Ring Down ◽  
Fiber Loop

Cavity ring-down (CRD) spectrometers used for analytical applications frequently have design requirements different from spectrometers used for gas-phase spectroscopic applications. A formalism that allows for maximization of the relative sensitivity by adapting the cavity length and absorption path through the sample is presented. These experimental configurations may not reduce the detection limit but do allow for a high sensitivity of the ring-down time measurement in the concentration range of interest. The formalism is applied to two common CRDS experimental configurations and to a fiber-loop ring-down experiment.Key words: cavity ring-down (CRD), absorption, detector, fiber-loop, sensitivity, detection limit.

Ultra-high sensitivity photodetector arrays with integrated amplification and passivation nano-layers

2010 ◽  
Author(s):  
Jie Yao ◽  
Irina A. Mokina ◽  
Feng Liu ◽  
Sean Wang ◽  
Jack Zhou ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Photodetector Arrays

Design and Production of Wireless Micro Sensor Node Based on Printed Electronics Technology

2012 ◽  
Author(s):  
F. Guo ◽  
H. Zhou ◽  
J. Wei ◽  
Z. Wei
Keyword(s):  
Production Cost ◽  
Sensor Node ◽  
Printed Electronics ◽  
Low Cost ◽  
High Sensitivity ◽  
Sensor Nodes ◽  
Micro Sensor ◽  
Design Requirements ◽  
Internet Of Things Technology ◽  
Important Design

With the wide applications of Internet of Things technology, the design and fabrication of small size sensor nodes with high sensitivity at low cost will be the main direction of development. In this paper, the important design requirements and design drivers for the manufacturing of wireless micro sensor node based on printed electronics technology are analysed and reviewed. The micro-sensor nodes fabricated can be powered with solar cell. The production cost could be effectively reduced and the life of the system is extended. The sensor nodes could be widely used for real-time monitoring in wide areas.

scholarly journals Ultra‐High Performance Amorphous Ga 2 O 3 Photodetector Arrays for Solar‐Blind Imaging

2021 ◽  
pp. 2101106
Author(s):  
Yuan Qin ◽  
Li‐Heng Li ◽  
Zhaoan Yu ◽  
Feihong Wu ◽  
Danian Dong ◽  
...  
Keyword(s):  
High Performance ◽  
Solar Blind ◽  
Photodetector Arrays

Ultra-high sensitivity photodetector arrays with integrated amplification and passivation nano-layers

2009 ◽  
Author(s):  
Jie Yao ◽  
Sean Wang ◽  
Jack Zhou ◽  
Ken Li ◽  
Michael Lange ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Photodetector Arrays
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