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US 2022/0247908 A1Published application
Phase-sensitive compressed ultrafast photography systems and methods
AssigneeCalifornia Institute of Technology
InventorsLihong Wang, Taewoo Kim, Jinyang Liang, Liren Zhu
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Abstract
Among the various aspects of the present disclosure is the provision of systems and methods of phase-sensitive compressed ultrafast photography.
Claims21
A phase-sensitive compressed ultrafast photography (pCUP) system for obtaining a series of final recorded images of a subject, comprising:
- a dark-field imaging system, the dark-field imaging system comprising:
- a laser source configured to illuminate the subject with at least a first laser pulse for an imaging duration;
- and
- a beam block configured to pass laser light scattered by the subject upon illumination by the first laser pulse as a first series of phase images and block laser light not scattered by the subject;
- and
- a compressed ultrafast photography (CUP) system configured to receive the laser light scattered by the subject and passed by the beam block, the CUP system comprising:
- a spatial encoding module configured to receive the first series of phase images and to produce a second series of spatially encoded phase images, each spatially encoded phase image of the second series comprising at least a first view including one phase image of the first series superimposed with a pseudo-random binary spatial pattern;
- and
- a streak camera coupled to the spatial encoding module, the streak camera configured to receive the second series of spatially encoded phase images, to deflect each spatially encoded phase image by a temporal deflection distance that varies as a function of time-of-arrival, and to integrate the deflected phase images into a single raw CUP image.
6 more elements
A compressed ultrafast photography (CUP) system for imaging a subject, comprising:
- an imaging system, the imaging system configured to illuminate the subject with at least a first laser pulse and produce a first series of images of the subject;
- and
- a compressed ultrafast photography (CUP) system configured to receive the first series of images of the subject, the CUP system comprising:
- a spatial encoding module configured to receive the first series of images and to produce a second series of spatially encoded images, each spatially encoded image of the second series comprising a first view including one image of the first series superimposed with a pseudo-random binary spatial pattern and a second view including the one image of the first series superimposed with a complementary pseudo-random binary spatial pattern;
- at least one optical component configured to transform the first view and/or the second view such that the first view is rotated 180° relative to the second view;
- and
- a streak camera coupled to the at least one optical component, the streak camera configured to receive the second series of spatially encoded images with the first view rotated 180° relative to the second view, configured to deflect each spatially encoded image by a temporal deflection distance that varies as a function of time-of-arrival, and to integrate the deflected images into a single raw CUP image.
4 more elements
A method of obtaining a series of final recorded phase images of an object using a phase-sensitive compressed-sensing ultrafast photography system, the method comprising:
- collecting a first series of phase images of a subject;
- superimposing a pseudo-random binary spatial pattern onto each phase image of the first series to produce a first view of a second series of spatially encoded images;
- deflecting each spatially encoded image of the second series by a temporal deflection distance that varies as a function of a time-of-arrival of each spatially encoded image;
- recording each deflected spatially encoded image as a third series of spatially and temporally encoded phase images;
- and
- reconstructing a fourth series of final phase images by processing each spatially and temporally encoded phase image of the third series according to an image reconstruction algorithm.
3 more elements
Dependencies are inferred from the claim text.