Super sensitive time resolution spectrograph and time resolution method thereof

A technology of sensitive time and spectrometer, applied in the optical field, can solve the problems of spectral analysis and time resolution of unobservable objects, achieve high time resolution accuracy, reduce the measurement dimension and measurement scale.

Inactive Publication Date: 2013-05-22
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the devices in the prior art cannot perform spectral analysis and time resolution on the observed object at the same time, thereby providing a device that can simultaneously realize spectral analysis and time resolution

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  • Super sensitive time resolution spectrograph and time resolution method thereof
  • Super sensitive time resolution spectrograph and time resolution method thereof
  • Super sensitive time resolution spectrograph and time resolution method thereof

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Embodiment Construction

[0058] The present invention will be further described now in conjunction with accompanying drawing.

[0059] Before describing the present invention in detail, firstly, relevant concepts involved in the present invention will be described accordingly.

[0060] Time resolution: It refers to the ability to observe the transient process of physics and chemistry and to distinguish its time.

[0061] Compressive Sensing (CS for short) principle: The compressed sensing principle is a new mathematical theory proposed by Donoho, Tao and Candès et al. According to this theory, it can be randomly sampled with fewer data samples (far below the limit of the Nyquist / Shannon sampling theorem) to perfectly restore the original signal with higher robustness. Compressed sensing is mainly divided into three steps: compressed sampling, sparse transformation and algorithm reconstruction; among them, compressed sampling refers to the process of mapping and collecting the measured signal from hig...

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Abstract

The invention relates to a super sensitive time resolution spectrograph which comprises an optics unit and an electricity unit. The optics unit comprises an incidence slit, a light collimating part, a concave mirror, a grating light-dividing part, a spatial light modulator and a convergence light-receiving part, the concave mirror comprises a first concave mirror and a second concave mirror, and the electricity unit comprises a random number generator, a single photon point detector, a counter, a time measuring instrument, a control module, a data packet storage and a compression sensing module. To-be-detected quite-weak light incomes through the entrance slit and goes through the light collimating part and the first concave mirror for beam expanding and collimating so as to enable the light to be parallel light, the parallel light is irradiated on the grating light-dividing part, a generated grating reflecting light field is reflected by the second concave mirror to be folded on the spatial light modulator to form a spectrum band, the spatial light modulator randomly modulates the spectrum band to enable emergent light of the spectrum band to be emitted to the convergence light-receiving part at a certain random probability, and the convergence light-receiving part filters stray light and transmits the filtered light to the single photon point detector.

Description

technical field [0001] The invention relates to the field of optics, in particular to an ultrasensitive time-resolved spectrometer and a time-resolved method thereof. Background technique [0002] At present, the technologies used in the measurement of transient extremely weak light (such as fluorescence lifetime) mainly include single-molecule detection technology, time-resolution technology and super-resolution measurement technology. Among them: (1) Single-molecule detection technologies mainly include wide-field confocal fluorescence microscopy, scanning near-field optical microscopy (SNOM), total internal reflection fluorescence microscopy (TIRF), atomic force optical microscopy (AFOM) and Raman scattering technology; (2) Time-resolved technologies mainly include fluorescence lifetime imaging (FLIM), two-photon fluorescence lifetime microscopy imaging, fluorescence lifetime correlation spectroscopy (FCS) technology and multi-dimensional fluorescence lifetime microscopy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28
Inventor 翟光杰俞文凯王超
Owner NAT SPACE SCI CENT CAS
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