Computational optical imaging is an interdisciplinary subject integrating optics, mathematics, and information technology. It introduces information processing into optical imaging and combines it with intelligent com...Computational optical imaging is an interdisciplinary subject integrating optics, mathematics, and information technology. It introduces information processing into optical imaging and combines it with intelligent computing, subverting the imaging mechanism of traditional optical imaging which only relies on orderly information transmission. To meet the high-precision requirements of traditional optical imaging for optical processing and adjustment, as well as to solve its problems of being sensitive to gravity and temperature in use, we establish an optical imaging system model from the perspective of computational optical imaging and studies how to design and solve the imaging consistency problem of optical system under the influence of gravity, thermal effect, stress, and other external environment to build a high robustness optical system. The results show that the high robustness interval of the optical system exists and can effectively reduce the sensitivity of the optical system to the disturbance of each link, thus realizing the high robustness of optical imaging.展开更多
Digital holography possesses the advantages of wide-field,non-contact,precise,and dynamic measurements for the complex amplitude of object waves.Today,digital holography and its derivatives have been widely applied in...Digital holography possesses the advantages of wide-field,non-contact,precise,and dynamic measurements for the complex amplitude of object waves.Today,digital holography and its derivatives have been widely applied in interferometric measurements,three-dimensional imaging,and quantitative phase imaging,demonstrating significant potential in the material science,industry,and biomedical fields,among others.However,in conventional off-axis holographic experimental setups,the object and reference beams propagate in separated paths,resulting in low temporal stability and measurement sensitivity.By designing common-path configurations where the two interference beams share the same or similar paths,environmental disturbance to the two beams can be effectively compensated.Therefore,the temporal stability of the experimental setups for hologram recording can be significantly improved for time-lapsing measurements.In this review,we categorise the common-path models as lateral shearing,point diffraction,and other types based on the different approaches to generate the reference beam.Benefiting from compact features,common-path digital holography is extremely promising for the manufacture of highly stable optical measurement and imaging instruments in the future.展开更多
Atmospheric turbulence distorts the complex wavefront of light in free-space optical communication systems,leading to bit errors and even communication interruptions.Recently,it is found that the non-separability of v...Atmospheric turbulence distorts the complex wavefront of light in free-space optical communication systems,leading to bit errors and even communication interruptions.Recently,it is found that the non-separability of vectorial structured light remains invariant when transmitting through atmospheric turbulence.This discovery offers a potential solution for turbulence-resilient communications—encoding based on the non-separability of vectorial structured light.To achieve such turbulence-resilient communications,efficient detection of the non-separability of vectorial structured light is essential,which acts as the receivers of such communication systems.So far,traditional non-separability detection schemes usually rely on bulky SLMs or DMDs,facing inherent trade-offs between single-shot capability and system compactness.In addition,the detection of mode-resolved non-separability contributions of vectorial superposition states has not yet been accomplished.Here,we propose and experimentally demonstrate a coherent detector to characterize the non-separability of vectorial structured light based on off-axis digital holography,which overcomes the limitations of traditional approaches by digitally decomposing spatial modes.Our approach may pave the way for turbulence-resilient optical communications based on non-separability coding methods and bring new insights into non-separability measurement.展开更多
High-resolution imaging through randomly dynamic scattered fields and highly scattered walls is an extensively sought-after capability with potential applications in various fields such as underwater imaging,biomedica...High-resolution imaging through randomly dynamic scattered fields and highly scattered walls is an extensively sought-after capability with potential applications in various fields such as underwater imaging,biomedical imaging,and seeing through fog.Numerous methods have been proposed to unscramble object information from degraded scattered images,resulting in considerable improvements in image contrast in degraded scenarios[1].展开更多
文摘Computational optical imaging is an interdisciplinary subject integrating optics, mathematics, and information technology. It introduces information processing into optical imaging and combines it with intelligent computing, subverting the imaging mechanism of traditional optical imaging which only relies on orderly information transmission. To meet the high-precision requirements of traditional optical imaging for optical processing and adjustment, as well as to solve its problems of being sensitive to gravity and temperature in use, we establish an optical imaging system model from the perspective of computational optical imaging and studies how to design and solve the imaging consistency problem of optical system under the influence of gravity, thermal effect, stress, and other external environment to build a high robustness optical system. The results show that the high robustness interval of the optical system exists and can effectively reduce the sensitivity of the optical system to the disturbance of each link, thus realizing the high robustness of optical imaging.
基金Support from the National Natural Science Foundation of China(NSFC)(61927810,62075183,62005219)Fundamental Research Funds for the Central Universities(310202011qd004)is acknowledged.
文摘Digital holography possesses the advantages of wide-field,non-contact,precise,and dynamic measurements for the complex amplitude of object waves.Today,digital holography and its derivatives have been widely applied in interferometric measurements,three-dimensional imaging,and quantitative phase imaging,demonstrating significant potential in the material science,industry,and biomedical fields,among others.However,in conventional off-axis holographic experimental setups,the object and reference beams propagate in separated paths,resulting in low temporal stability and measurement sensitivity.By designing common-path configurations where the two interference beams share the same or similar paths,environmental disturbance to the two beams can be effectively compensated.Therefore,the temporal stability of the experimental setups for hologram recording can be significantly improved for time-lapsing measurements.In this review,we categorise the common-path models as lateral shearing,point diffraction,and other types based on the different approaches to generate the reference beam.Benefiting from compact features,common-path digital holography is extremely promising for the manufacture of highly stable optical measurement and imaging instruments in the future.
基金supported by the National Key R&D Program of China(2025YFE0102200)National Natural Science Foundation of China(62405233,62125503,62261160388)+4 种基金Fundamental Research Funds for the Central Universities(XJSJ24030)Natural Science Foundation of Hubei Province of China(2023AFA028)Hubei Optical Fundamental Research Center(HBO2025TQ004)the Opening Project of Henan Province Engineering Technology Research Center for Photoelectric Detection and Sensing Integration,Henan Polytechnic University(KF202504)Yize Liang thanks UPOLabs for providing the SLM(HDSLM80R-PLUS).
文摘Atmospheric turbulence distorts the complex wavefront of light in free-space optical communication systems,leading to bit errors and even communication interruptions.Recently,it is found that the non-separability of vectorial structured light remains invariant when transmitting through atmospheric turbulence.This discovery offers a potential solution for turbulence-resilient communications—encoding based on the non-separability of vectorial structured light.To achieve such turbulence-resilient communications,efficient detection of the non-separability of vectorial structured light is essential,which acts as the receivers of such communication systems.So far,traditional non-separability detection schemes usually rely on bulky SLMs or DMDs,facing inherent trade-offs between single-shot capability and system compactness.In addition,the detection of mode-resolved non-separability contributions of vectorial superposition states has not yet been accomplished.Here,we propose and experimentally demonstrate a coherent detector to characterize the non-separability of vectorial structured light based on off-axis digital holography,which overcomes the limitations of traditional approaches by digitally decomposing spatial modes.Our approach may pave the way for turbulence-resilient optical communications based on non-separability coding methods and bring new insights into non-separability measurement.
文摘High-resolution imaging through randomly dynamic scattered fields and highly scattered walls is an extensively sought-after capability with potential applications in various fields such as underwater imaging,biomedical imaging,and seeing through fog.Numerous methods have been proposed to unscramble object information from degraded scattered images,resulting in considerable improvements in image contrast in degraded scenarios[1].
