scholarly journals Design and Integration of the Single-Lens Curved Multi-Focusing Compound Eye Camera

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 331
Author(s):  
Kekai Tao ◽  
Gaoge Lian ◽  
Yongshun Liu ◽  
Huaming Xing ◽  
Yi Xing ◽  
...  
Keyword(s):  
High Resolution ◽  
Small Volume ◽  
Compound Eye ◽  
Imaging System ◽  
Numerical Aperture ◽  
Large Field ◽  
Ultraviolet Curing ◽  
Single Lens ◽  
Further Development ◽  
Field Imaging

Compared with a traditional optical system, the single-lens curved compound eye imaging system has superior optical performance, such as a large field of view (FOV), small size, and high portability. However, defocus and low resolution hinder the further development of single-lens curved compound eye imaging systems. In this study, the design of a nonuniform curved compound eye with multiple focal lengths was used to solve the defocus problem. A two-step gas-assisted process, which was combined with photolithography, soft photolithography, and ultraviolet curing, was proposed for fabricating the ommatidia with a large numerical aperture precisely. Ommatidia with high resolution were fabricated and arranged in five rings. Based on the imaging experimental results, it was demonstrated that the high-resolution and small-volume single-lens curved compound eye imaging system has significant advantages in large-field imaging and rapid recognition.

scholarly journals Phase-Controlled Planar Metalenses for High-Resolution Terahertz Focusing

Photonics ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 143
Author(s):  
Xin Yu ◽  
Yun Shen ◽  
Guohong Dai ◽  
Liner Zou ◽  
Tailin Zhang ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
Imaging System ◽  
Incident Light ◽  
Near Field ◽  
Numerical Aperture ◽  
Full Width ◽  
Half Maximum ◽  
Near Field Imaging ◽  
Field Imaging

We experimentally demonstrate that high-resolution terahertz focusing can be realized in planar metalenses, which consist of arrays of different V-shaped antenna units on a silicon substrate. Numerical results show that a larger numerical aperture of metalenses can provide smaller full width at half maximum of field distribution, leading to higher spatial resolution. The measurement of fabricated metalenses samples was performed by a terahertz near-field imaging system, and experimental results agree well with the numerical prediction. Especially for 1.1 THz incident light, when the numerical aperture increases from 0.79 to 0.95, the full width at half maximum correspondingly decreases from 343 μm to 206 μm, offering an improvement of spatial resolution.

Realized large field of view infrared imaging system of single lens with external field splicing

2020 ◽  
Vol 49 (3) ◽  
pp. 314002-314002
Author(s):  
单秋莎 Qiusha Shan ◽  
苏秀琴 Xiuqin Su ◽  
段晶 Jing Duan ◽  
周亮 Liang Zhou ◽  
刘凯 Kai Liu ◽  
...  
Keyword(s):  
External Field ◽  
Infrared Imaging ◽  
Imaging System ◽  
Field Of View ◽  
Large Field ◽  
Infrared Imaging System ◽  
Single Lens

Simple and rapid CD4 testing based on large-field imaging system composed of microcavity array and two-dimensional photosensor

2015 ◽  
Vol 67 ◽  
pp. 350-355 ◽  
Author(s):  
Tatsuya Saeki ◽  
Yuriko Sugamura ◽  
Masahito Hosokawa ◽  
Tomoko Yoshino ◽  
Tae-kyu Lim ◽  
...  
Keyword(s):  
Imaging System ◽  
Large Field ◽  
Two Dimensional ◽  
Field Imaging ◽  
Cd4 Testing

Developments of X-Ray Grating Imaging Technology

2014 ◽  
Vol 898 ◽  
pp. 614-617
Author(s):  
Rui Hong Li ◽  
Yue Ping Han
Keyword(s):  
High Resolution ◽  
Imaging System ◽  
Imaging Techniques ◽  
Field Of View ◽  
Imaging Systems ◽  
Large Field ◽  
X Ray ◽  
X Ray Imaging ◽  
Angle Scattering ◽  
Interferometry Method

The present paper reviews the X-ray grating imaging systems at home and abroad from the aspects of technological characterizations and the newest researching focus. First, not only the imaging principles and the frameworks of the typical X-ray grating imaging system based on Talbot-Lau interferometry method, but also the algorithms of retrieving the signals of attenuation, refraction and small-angle scattering are introduced. Second, the system optimizing methods are discussed, which involves mainly the relaxing the requirement of high positioning resolution and strict circumstances for gratings and designing large field of view with high resolution. Third, two and four-dimensional grating-based X-ray imaging techniques are introduced.

Research and design of single lens high resolution imaging system

2017 ◽  
Vol 46 (11) ◽  
pp. 1118001
Author(s):  
徐宁 Xu Ning ◽  
付跃刚 Fu Yuegang ◽  
浦东 Pu Dong
Keyword(s):  
High Resolution ◽  
Imaging System ◽  
High Resolution Imaging ◽  
Single Lens ◽  
Resolution Imaging ◽  
Research And Design

Curved compound eye imaging system with a large field of view based on a plano-concave substrate

2012 ◽  
Author(s):  
Hongxia Zhang ◽  
Chenggang Zou ◽  
Le Song ◽  
Xiaodong Zhang ◽  
Fengzhou Fang ◽  
...  
Keyword(s):  
Compound Eye ◽  
Imaging System ◽  
Field Of View ◽  
Large Field

scholarly journals Dual-phone illumination-imaging system for high resolution and large field of view multi-modal microscopy

Lab on a Chip ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 825-836 ◽  
Author(s):  
Sara Kheireddine ◽  
Ayyappasamy Sudalaiyadum Perumal ◽  
Zachary J. Smith ◽  
Dan V. Nicolau ◽  
Sebastian Wachsmann-Hogiu
Keyword(s):  
High Resolution ◽  
Fluorescence Microscopy ◽  
Mobile Phone ◽  
Imaging System ◽  
Dark Field ◽  
Field Of View ◽  
Large Field ◽  
Bright Field

Bright-field, dark-field, Rheinberg, fluorescence microscopy on a mobile phone with phone screen illumination.

Fourier ptychography for high space-bandwidth product microscopy

2017 ◽  
Vol 6 (6) ◽  
Author(s):  
Liheng Bian ◽  
Jinli Suo ◽  
Qionghai Dai ◽  
Feng Chen
Keyword(s):  
High Resolution ◽  
Phase Retrieval ◽  
Imaging Technique ◽  
Numerical Aperture ◽  
Large Field ◽  
Objective Lens ◽  
Mechanical Scanning ◽  
High Space ◽  
Working Distance ◽  
Microscopy Techniques

AbstractFourier ptychography is a novel imaging technique with high space-bandwidth product (SBP) on the scale of gigapixel, and has been successfully applied for high-resolution and large field-of-view (FOV) microscopy, termed Fourier ptychographic microscopy (FPM). FPM utilizes a low-numerical-aperture objective lens to capture multiple large FOV but low-resolution images under angularly varying illumination, and uses phase-retrieval algorithms to reconstruct the sample’s high-resolution amplitude and phase information. FPM is advantageous over conventional high SBP microscopy techniques in many aspects, including no mechanical scanning, computational acquisition of both amplitude and phase, extended depth of focus, long working distance, and high compatibility with current microscopes. In this paper, we review FPM with its principles, multiple techniques to improve its performance, and its various applications and extensions.

scholarly journals Calibration Technique of a Curved Zoom Compound Eye Imaging System

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 776 ◽  
Author(s):  
Fengli Liu ◽  
Xiaolei Diao ◽  
Lun Li ◽  
Yongping Hao
Keyword(s):  
Compound Eye ◽  
Imaging System ◽  
Incident Light ◽  
Calibration Method ◽  
Large Field ◽  
Surface Compound ◽  
Spot Center ◽  
Fitting Method ◽  
Light Vector ◽  
Vision Positioning

A calibration method for the designed curved zoom compound eye is studied in order to achieve detection and positioning of spatial objects. The structure of the curved zoom compound eye is introduced. A calibration test platform is designed and built based on the image characteristics of the compound eye, which can be constructed in the large field view for the calibration target. The spot images are obtained through image processing. The center of the spot is calculated by Gauss fitting method. This method is highly simple and intuitive, and it can be used in a zoom surface compound eye without any complex procedures. Finally, the corresponding relationship between the spot center coordinates and the incident light vector of the corresponding sub-eye is established, and the calibration of the multi vision positioning system is completed.

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