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Proceedings Paper

All-optical framing photography based on hyperspectral imaging method
Author(s): Shouxian Liu; Yu Li; Zeren Li; Guanghua Chen; Qixian Peng; Jiangbo Lei; Jun Liu; Shuyun Yuan
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Paper Abstract

We propose and experimentally demonstrate a new all optical-framing photography that uses hyperspectral imaging methods to record a chirped pulse’s temporal-spatial information. This proposed method consists of three parts: (1) a chirped laser pulse encodes temporal phenomena onto wavelengths; (2) a lenslet array generates a series of integral pupil images;(3) a dispersive device disperses the integral images at void space of image sensor. Compared with Ultrafast All-Optical Framing Technology(Daniel Frayer,2013,2014) and Sequentially Time All-Optical Mapping Photography( Nakagawa 2014, 2015), our method is convenient to adjust the temporal resolution and to flexibly increase the numbers of frames. Theoretically, the temporal resolution of our scheme is limited by the amount of dispersion that is added to a Fourier transform limited femtosecond laser pulse. Correspondingly, the optimal number of frames is decided by the ratio of the observational time window to the temporal resolution, and the effective pixels of each frame are mostly limited by the dimensions M×N of the lenslet array. For example, if a 40fs Fourier transform limited femtosecond pulse is stretched to ~10ps, a CCD camera with 2048×3072 pixels can record ~15 framing images with temporal resolution of 650fs and image size of 100×100 pixels. As spectrometer structure, our recording part has another advantage that not only amplitude images but also frequency domain interferograms can be imaged. Therefore, it is comparatively easy to capture fast dynamics in the refractive index change of materials. A further dynamic experiment is being conducted.

Paper Details

Date Published: 20 February 2017
PDF: 6 pages
Proc. SPIE 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics, 103280C (20 February 2017); doi: 10.1117/12.2269489
Show Author Affiliations
Shouxian Liu, China Academy of Engineering Physics (China)
Yu Li, China Academy of Engineering Physics (China)
Zeren Li, China Academy of Engineering Physics (China)
Guanghua Chen, China Academy of Engineering Physics (China)
Qixian Peng, China Academy of Engineering Physics (China)
Jiangbo Lei, China Academy of Engineering Physics (China)
Jun Liu, China Academy of Engineering Physics (China)
Shuyun Yuan, China Academy of Engineering Physics (China)


Published in SPIE Proceedings Vol. 10328:
Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics
T. Goji Etoh; Hiroyuki Shiraga, Editor(s)

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