Infrared hyperspectral cameras are complicated in structure, require a large amount of imaging data, and the array detector is expensive, which is not conducive to the efficient imaging and real-time data analysis of objects in the infrared regime. Single pixel imaging offers a solution by employing compressed sampling. This paper describes the design and real time operation of a parallel single-pixel near infrared hyperspectral imaging system which can obtain a 128×128×256 spectral cube image with a spectral resolution of 4 nm within the range of 975 to 1736 nm. The compression rate and reconstructed image quality using different orderings of the Hadamard modulation basis, including the natural, cake cutting, and the Russian dolls sequences, are compared. A good reconstructed image of a dynamic object can be realized even with a compression sampling rate as low as 0.78% with the Russian doll sequence. The method proposed in this paper should have many potential applications due to its efficient sampling and high-speed reconstruction enabled by parallel spectral channel computation.
Superconducting nanowire single photon detector response to X-ray photon was demonstrated using a laser-plasma subps X-ray radiation, to the best of our knowledge. The time jitter was measured to be 248.2 ps, which is larger than ordinary visible or NIR SNSPDs and its efficiency is relatively lower, but the results pave the way for a new competitive X-ray detector with ultrahigh count rates, ultralow timing jitter, ultrahigh sensitivity and negligible dark counts.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.