Calibration Technique of a Curved Zoom Compound Eye Imaging System

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

10.1117/12.2008758 ◽

2012 ◽

Cited By ~ 1

Author(s):

Hongxia Zhang ◽

Chenggang Zou ◽

Le Song ◽

Xiaodong Zhang ◽

Fengzhou Fang ◽

...

Keyword(s):

Compound Eye ◽

Imaging System ◽

Field Of View ◽

Large Field

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Point by point calibration method for simultaneous polarization imaging system based on large field polarization imaging theory

Optik ◽

10.1016/j.ijleo.2018.10.145 ◽

2019 ◽

Vol 180 ◽

pp. 1027-1035

Author(s):

Xiaotian Lu ◽

Jie Yang ◽

Li Li ◽

Weiqi Jin ◽

Hengze Wu ◽

...

Keyword(s):

Imaging System ◽

Calibration Method ◽

Large Field ◽

Polarization Imaging ◽

Field Polarization ◽

Imaging Theory

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Theory and analysis of a large field polarization imaging system with obliquely incident light

Optics Express ◽

10.1364/oe.26.002495 ◽

2018 ◽

Vol 26 (3) ◽

pp. 2495 ◽

Cited By ~ 4

Author(s):

Xiaotian Lu ◽

Weiqi Jin ◽

Li Li ◽

Xia Wang ◽

Su Qiu ◽

...

Keyword(s):

Imaging System ◽

Incident Light ◽

Large Field ◽

Polarization Imaging ◽

Field Polarization ◽

Obliquely Incident

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Design, fabrication and testing of a compact large-field-of-view infrared compound eye imaging system by precision glass molding

Precision Engineering ◽

10.1016/j.precisioneng.2020.06.017 ◽

2020 ◽

Vol 66 ◽

pp. 87-98

Author(s):

Lin Zhang ◽

Luyang Zhou ◽

Wenchen Zhou ◽

Shuqing Zhang ◽

Allen Y. Yi

Keyword(s):

Compound Eye ◽

Imaging System ◽

Field Of View ◽

Large Field ◽

Glass Molding ◽

Precision Glass Molding

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Artificial compound-eye imaging system with a large field of view based on a convex solid substrate

10.1117/12.869482 ◽

2010 ◽

Cited By ~ 5

Author(s):

Yukun Zhang ◽

Jinglei Du ◽

Lifang Shi ◽

Xiaochun Dong ◽

Xingzhan Wei ◽

...

Keyword(s):

Compound Eye ◽

Imaging System ◽

Solid Substrate ◽

Field Of View ◽

Large Field

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

Micromachines ◽

10.3390/mi12030331 ◽

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.

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Morpho-molecular ex vivo detection and grading of non-muscle-invasive bladder cancer using forward imaging probe based multimodal optical coherence tomography and Raman spectroscopy

The Analyst ◽

10.1039/c9an01911a ◽

2020 ◽

Vol 145 (4) ◽

pp. 1445-1456 ◽

Cited By ~ 1

Author(s):

Fabian Placzek ◽

Eliana Cordero Bautista ◽

Simon Kretschmer ◽

Lara M. Wurster ◽

Florian Knorr ◽

...

Keyword(s):

Raman Spectroscopy ◽

Optical Coherence Tomography ◽

Imaging System ◽

Ex Vivo ◽

Large Field ◽

Optical Coherence ◽

Fiber Optic Probe ◽

Optic Probe ◽

Muscle Invasive

Characterization of bladder biopsies, using a combined fiber optic probe-based optical coherence tomography and Raman spectroscopy imaging system that allows a large field-of-view imaging and detection and grading of cancerous bladder lesions.

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Optical Aberration Calibration and Correction of Photographic System Based on Wavefront Coding

Sensors ◽

10.3390/s21124011 ◽

2021 ◽

Vol 21 (12) ◽

pp. 4011

Author(s):

Chuanwei Yao ◽

Yibing Shen

Keyword(s):

Imaging System ◽

Optical Design ◽

Computational Imaging ◽

Large Field ◽

Wavefront Aberration ◽

Imaging Method ◽

Image Deconvolution ◽

Pupil Function ◽

Wavefront Coding ◽

Blurred Images

The image deconvolution technique can recover potential sharp images from blurred images affected by aberrations. Obtaining the point spread function (PSF) of the imaging system accurately is a prerequisite for robust deconvolution. In this paper, a computational imaging method based on wavefront coding is proposed to reconstruct the wavefront aberration of a photographic system. Firstly, a group of images affected by local aberration is obtained by applying wavefront coding on the optical system’s spectral plane. Then, the PSF is recovered accurately by pupil function synthesis, and finally, the aberration-affected images are recovered by image deconvolution. After aberration correction, the image’s coefficient of variation and mean relative deviation are improved by 60% and 30%, respectively, and the image can reach the limit of resolution of the sensor, as proved by the resolution test board. Meanwhile, the method’s robust anti-noise capability is confirmed through simulation experiments. Through the conversion of the complexity of optical design to a post-processing algorithm, this method offers an economical and efficient strategy for obtaining high-resolution and high-quality images using a simple large-field lens.

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