Research On A 3D Imaging Spectrometer Based On Depth Ranging

The abundance of data information provides more comprehensive and accurate data support,and makes analysis and decision-making more scientific and reliable.The 3D imaging spectrometer combines spectral imaging technology with depth ranging technology.The spectral imaging technology provides two-dimensional image information and one-dimensional spectral information of the target object;the depth ranging technology provides axial depth information of the target object.Together they form a data cube known as the "4D data cube".The research proposes a 3D imaging spectrometer based on depth ranging,introduces the system architecture of the 3D imaging spectrometer and details the methods for spectral imaging as well as object depth detection.In the phase recovery algorithm,the algorithm time complexity is reduced by reducing the distribution of fetched values in data acquisition and optimizing the observation model,while reducing the memory footprint by 30%.In the effective angular range of the optical memory effect,the depth information of the target object is obtained using the scaling of the point spread function in different position planes,breaking the limitation of needing to know a specific wavelength in phase ranging to be able to convert with the optical range difference,while the error between the measured value and the actual depth distance is only 0.2 cm.The spectral recovery is achieved by using the implicit retrieval of the point diffusion function to reduce the complexity of the experimental system,and by using the matrix of calibration coefficients to achieve the spectral recovery,the magnification of the reference object is calculated to be similar to the actual magnification,and the difference between the recovered spectrum and the peak of the main peak of the original spectrum is 10.4 nm at the maximum and 2.44 nm at the minimum.The final result is the acquisition of twodimensional image information,one-dimensional depth information and one-dimensional spectral information of the target object.Compared with conventional 3D imaging spectrometers,the 3D imaging spectrometer proposed in this research has greater advantages in terms of overall machine cost,spectral resolution and depth detection,and has a bright future development prospect.