An analytical propagation expression of a Pearcey beam in uniaxial crystals orthogonal to the optical axis is derived.The propagations of the Pearcey beam in the tourmaline and the quartz are investigated. The phase d...An analytical propagation expression of a Pearcey beam in uniaxial crystals orthogonal to the optical axis is derived.The propagations of the Pearcey beam in the tourmaline and the quartz are investigated. The phase distribution and the angular momentum of the Pearcey beam in the tourmaline are also performed. The result shows that the positions of the auto-focusing and the inversion simply relate to the extraordinary refractive index of the crystals. In other words, we can choose the suitable crystals to adjust the positions of auto-focusing and inversion of the Pearcey beam to meet the actual needs.展开更多
In 1948,Dennis Gabor proposed the concept of holography,providing a pioneering solution to a quantitative description of the optical wavefront.After 75 years of development,holographic imaging has become a powerful to...In 1948,Dennis Gabor proposed the concept of holography,providing a pioneering solution to a quantitative description of the optical wavefront.After 75 years of development,holographic imaging has become a powerful tool for optical wavefront measurement and quantitative phase imaging.The emergence of this technology has given fresh energy to physics,biology,and materials science.Digital holography(DH)possesses the quantitative advantages of wide-field,non-contact,precise,and dynamic measurement capability for complex-waves.DH has unique capabilities for the propagation of optical fields by measuring light scattering with phase information.It offers quantitative visualization of the refractive index and thickness distribution of weak absorption samples,which plays a vital role in the pathophysiology of various diseases and the characterization of various materials.It provides a possibility to bridge the gap between the imaging and scattering disciplines.The propagation of wavefront is described by the complex amplitude.The complex-value in the complex-domain is reconstructed from the intensityvalue measurement by camera in the real-domain.Here,we regard the process of holographic recording and reconstruction as a transformation between complex-domain and real-domain,and discuss the mathematics and physical principles of reconstruction.We review the DH in underlying principles,technical approaches,and the breadth of applications.We conclude with emerging challenges and opportunities based on combining holographic imaging with other methodologies that expand the scope and utility of holographic imaging even further.The multidisciplinary nature brings technology and application experts together in label-free cell biology,analytical chemistry,clinical sciences,wavefront sensing,and semiconductor production.展开更多
A deep neural network for non-orthogonal input channel encoding is proposed to recover speckle images through a multimode fiber.This novel approach could shed new light on the non-orthogonal optical multiplexing over ...A deep neural network for non-orthogonal input channel encoding is proposed to recover speckle images through a multimode fiber.This novel approach could shed new light on the non-orthogonal optical multiplexing over a scattering medium.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11775083 and 11374108)
文摘An analytical propagation expression of a Pearcey beam in uniaxial crystals orthogonal to the optical axis is derived.The propagations of the Pearcey beam in the tourmaline and the quartz are investigated. The phase distribution and the angular momentum of the Pearcey beam in the tourmaline are also performed. The result shows that the positions of the auto-focusing and the inversion simply relate to the extraordinary refractive index of the crystals. In other words, we can choose the suitable crystals to adjust the positions of auto-focusing and inversion of the Pearcey beam to meet the actual needs.
基金National Natural Science Foundation of China(NSFC)(62235009)。
文摘In 1948,Dennis Gabor proposed the concept of holography,providing a pioneering solution to a quantitative description of the optical wavefront.After 75 years of development,holographic imaging has become a powerful tool for optical wavefront measurement and quantitative phase imaging.The emergence of this technology has given fresh energy to physics,biology,and materials science.Digital holography(DH)possesses the quantitative advantages of wide-field,non-contact,precise,and dynamic measurement capability for complex-waves.DH has unique capabilities for the propagation of optical fields by measuring light scattering with phase information.It offers quantitative visualization of the refractive index and thickness distribution of weak absorption samples,which plays a vital role in the pathophysiology of various diseases and the characterization of various materials.It provides a possibility to bridge the gap between the imaging and scattering disciplines.The propagation of wavefront is described by the complex amplitude.The complex-value in the complex-domain is reconstructed from the intensityvalue measurement by camera in the real-domain.Here,we regard the process of holographic recording and reconstruction as a transformation between complex-domain and real-domain,and discuss the mathematics and physical principles of reconstruction.We review the DH in underlying principles,technical approaches,and the breadth of applications.We conclude with emerging challenges and opportunities based on combining holographic imaging with other methodologies that expand the scope and utility of holographic imaging even further.The multidisciplinary nature brings technology and application experts together in label-free cell biology,analytical chemistry,clinical sciences,wavefront sensing,and semiconductor production.
文摘A deep neural network for non-orthogonal input channel encoding is proposed to recover speckle images through a multimode fiber.This novel approach could shed new light on the non-orthogonal optical multiplexing over a scattering medium.
