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

2018 ◽  
Vol 26 (3) ◽  
pp. 2495 ◽  
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

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

Optik ◽  
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

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.

scholarly journals 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 ◽  
2020 ◽  
Vol 145 (4) ◽  
pp. 1445-1456 ◽  
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.

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

Sensors ◽  
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.

Design of the freeform imaging system with large field of view and large relative aperture

2020 ◽  
Vol 49 (8) ◽  
pp. 20200005-20200005
Author(s):  
陈炳旭 Bingxu Chen ◽  
廖志远 Zhiyuan Liao ◽  
操超 Chao Cao ◽  
白瑜 Yu Bai ◽  
牟达 Da Mu
Keyword(s):  
Imaging System ◽  
Field Of View ◽  
Large Field

Interference filters with an unsplit passband for obliquely incident light

1976 ◽  
Vol 24 (5) ◽  
pp. 658-661
Author(s):  
I. N. Shklyarevskii ◽  
G. Zartov ◽  
N. Manchev
Keyword(s):  
Incident Light ◽  
Interference Filters ◽  
Obliquely Incident

Optical Design of Decentered Aperture-Divided Polarization Imaging System

2013 ◽  
Vol 33 (6) ◽  
pp. 0622005 ◽  
Author(s):  
贺虎成 He Hucheng ◽  
季轶群 Ji Yiqun ◽  
周建康 Zhou Jiankang ◽  
赵知诚 Zhao Zhicheng ◽  
沈为民 Shen Weimin
Keyword(s):  
Imaging System ◽  
Optical Design ◽  
Polarization Imaging

Design and experiment of hyper-spectral polarization imaging system based on AOTF

2017 ◽  
Vol 46 (1) ◽  
pp. 138002
Author(s):  
汪家春 Wang Jiachun ◽  
赵大鹏 Zhao Dapeng ◽  
杜香华 Du Xianghua ◽  
王启超 Wang Qichao ◽  
林志丹 Lin Zhidan ◽  
...  
Keyword(s):  
Imaging System ◽  
Polarization Imaging ◽  
Hyper Spectral
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