A Push-Broom Hyperspectral Imager With Coded Aperture Compressive Sampling Design And Implementation

In recent years,the traditional spectral imaging technology need to overcome many obstacles in the pursuit of higher spatial resolution,spectral resolution,image SNR levels,especially for the hardware requirements of the optical system design,the detector and computing data are become higher and higher.In space hyperspectral applications,the hardware requirements for optical system and detector of traditional sampling methods based on the Shannon-Nyquist sampling theorem is extremely high,the amount of data is too large,the demand growth has been far more than the existing optical system design and manufacture,development level of the detector manufacturing and the data processor.The good news is,as the development of compressive sampling imaging technology based on compressed sensing theory,compressive hyperspectral imaging technology combined with coded aperture compressive sampling imaging and spectral imaging also arises at the historic moment,which is expected to become an effective way to solve the problems facing.On the basis of compressive imaging technology and hyperspectral imaging technology,according to the characteristics of the space remote sensing application,this paper puts forward to the study of A push-broom compressive hyperspectral imager with coded aperture,main work is as follows:1.Designed and implemented an compressive super-resolution imaging system with function of situ calibration of coded aperture.Established the mathematical model of the system through theoretical analysis,and simulated the four times super-resolution imaging process.Also set up the corresponding experimental system,achieved the double super-resolution enhancement under laboratory conditions.2.Designed the overall system structure of the push-broom compressive hyperspectral imager with coded aperture.For the requirements of high performance lightweight direct-vision dispersion prism in compressive hyperspectral imager,designed a direct-vision double Amici prism by using of the polyester material(E48R)which has excellent optical performance,simulated a hyperspectral imaging system in optical simulation software with the use of designed prism,the simulation results show that the dispersion prism can completely satisfy the requirements of spectral imaging.3.Established the imaging model of push-broom hyperspectral imaging system with coded aperture compressive sampling.Carried on the simulation of sampling and reconstruction of spectral images,using 6 frames sampling data successfully recovered multispectral image data of 33 spectral channels.From the perspective of research results,compressive spectral imaging technology with coded aperture can reconstruct spectral data preferably in the case of low sampling,can solve the problems in the development of traditional hyperspectral imaging system.Hope that the result of this article can be helpful to the development of compressive spectral imaging technology with coded aperture.