scholarly journals Optical design of Offner coded aperture snapshot spectral imaging system based on dual-DMDs in MWIR band

2021 ◽  
Author(s):  
Yushi Zhao ◽  
Wenjun He ◽  
Zhiying Liu ◽  
Yuegang Fu
Keyword(s):  
Imaging System ◽  
Optical Design ◽  
Spectral Imaging ◽  
Coded Aperture

scholarly journals Optical Design of a Shortwave Infrared Dual Camera CASSI Based on Improved Offner-Wynne Imaging Spectrometer

2021 ◽  
Vol 2112 (1) ◽  
pp. 012021
Author(s):  
Chong Song ◽  
Lipeng Huo ◽  
Yong Huang ◽  
Yangdong Yan ◽  
Gang Wang ◽  
...  
Keyword(s):  
Optical System ◽  
Imaging System ◽  
Optical Measurement ◽  
Focal Length ◽  
Optical Design ◽  
Optical Transmittance ◽  
Coded Aperture ◽  
Visual Axis ◽  
Imaging Spectrometer ◽  
Shortwave Infrared

Abstract Based on the optical system characteristics of coded aperture snapshot spectral imager (CASSI), an optimized optical system of shortwave infrared dual camera CASSI was designed based on improved Offner-Wynne imaging spectrometer. The operating wavelength of the optical system ranges from 900nm to 1700nm, and the focal length is 1200mm. It consists of two parts: the two dimensional imaging system and the multispectral CASSI imaging system. The key technical parameters of the two parts are the same and there is no visual axis difference. Therefore, the optimized optical system can effectively improve real-time performance, optical transmittance and compactness of the dual camera shortwave infrared CASSI, which is conducive to the application in optical measurement scenes in the shooting range.

Optical design of a coded aperture infrared imaging system with resolution below the pixel limit

2010 ◽  
Author(s):  
Charlotte R. Bennett ◽  
Kevin D. Ridley ◽  
Geoff D. de Villiers ◽  
Philip J. Watson ◽  
Christopher W. Slinger ◽  
...  
Keyword(s):  
Infrared Imaging ◽  
Imaging System ◽  
Optical Design ◽  
Coded Aperture ◽  
Infrared Imaging System

scholarly journals High-dynamic range compressive spectral imaging by grayscale coded aperture adaptive filtering

2015 ◽  
Vol 35 (3) ◽  
pp. 53-60 ◽  
Author(s):  
Nelson Eduardo Diaz ◽  
Hoover Fabian Rueda Chacon ◽  
Henry Arguello Fuentes
Keyword(s):  
Dynamic Range ◽  
Imaging System ◽  
Three Dimensional ◽  
Spectral Imaging ◽  
Reconstruction Algorithm ◽  
High Dynamic Range ◽  
Data Cube ◽  
Coded Aperture ◽  
Coded Apertures

<p class="p1">The coded aperture snapshot spectral imaging system (CASSI) is an imaging architecture which senses the three dimensional informa-tion of a scene with two dimensional (2D) focal plane array (FPA) coded projection measurements. A reconstruction algorithm takes advantage of the compressive measurements sparsity to recover the underlying 3D data cube. Traditionally, CASSI uses block-un-block coded apertures (BCA) to spatially modulate the light. In CASSI the quality of the reconstructed images depends on the design of these coded apertures and the FPA dynamic range. This work presents a new CASSI architecture based on grayscaled coded apertu-res (GCA) which reduce the FPA saturation and increase the dynamic range of the reconstructed images. The set of GCA is calculated in a real-time adaptive manner exploiting the information from the FPA compressive measurements. Extensive simulations show the attained improvement in the quality of the reconstructed images when GCA are employed.  In addition, a comparison between traditional coded apertures and GCA is realized with respect to noise tolerance.</p>

Optical Design of Neotype Schwarzschild Spectral Imaging System with a Large Relative Aperture

2014 ◽  
Vol 41 (1) ◽  
pp. 0116001
Author(s):  
薛庆生 Xue Qingsheng ◽  
曹佃生 Cao Diansheng ◽  
于向阳 Yu Xiangyang
Keyword(s):  
Imaging System ◽  
Optical Design ◽  
Spectral Imaging

Optimization of a coded aperture coherent scatter spectral imaging system for medical imaging

2015 ◽  
Author(s):  
Joel A. Greenberg ◽  
Manu N. Lakshmanan ◽  
David J. Brady ◽  
Anuj J. Kapadia
Keyword(s):  
Medical Imaging ◽  
Imaging System ◽  
Spectral Imaging ◽  
Coded Aperture ◽  
Coherent Scatter
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