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Ultra-sensitive time resolution imaging spectrometer and time resolution imaging method thereof

An imaging spectrometer and sensitive time technology, applied in the optical field, can solve the problems of spectral analysis and time resolution of unobservable objects

Active Publication Date: 2013-05-08
NAT SPACE SCI CENT CAS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that existing instruments cannot perform spectral analysis and time resolution on the observation object at the same time, thereby providing a device that can simultaneously realize spectral analysis and time resolution imaging

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  • Ultra-sensitive time resolution imaging spectrometer and time resolution imaging method thereof
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  • Ultra-sensitive time resolution imaging spectrometer and time resolution imaging method thereof

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Embodiment Construction

[0064] The present invention will be further described now in conjunction with accompanying drawing.

[0065] Before describing the present invention in detail, firstly, relevant concepts involved in the present invention will be described accordingly.

[0066] Time resolution: It refers to the ability to observe the transient process of physics and chemistry and to distinguish its time.

[0067] 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 an ultra-sensitive time resolution imaging spectrometer which comprises an optics unit and an electricity unit. The optics unit comprises an incidence slit, a light beam expander collimation part, an optics imaging part, a first space light modulator, a second light modulator, a concave mirror, a grating beam split part and a convergence light collecting part. The electricity unit comprises a first random number generator, a second random number generator, a single photon point detector, a counter, a time measuring meter, a control module, a data package storer and a compression sensing module. Pianissimo light to be measured incidence is changed to parallel light through the light beam expander collimation part, a transmission optical imaging component is imaged on the first space light modulator which conducts random modulating, the concave mirror enables the incident light to be reflected, collimated and changed to the parallel light, the grating beam split part is hit by the concave mirror to form a spectral field, a spectrum band is formed on the second light modulator which conducts random modulation for the spectrum band, the convergence light collecting part filter stray light, and after filtering, the light is transmitted on the single photon point detector.

Description

technical field [0001] The invention relates to the field of optics, in particular to an ultrasensitive time-resolved imaging spectrometer and a time-resolved imaging 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 techniques mainly include fluorescence lifetime imaging (FLIM), two-photon fluorescence lifetime microscopy, fluorescence lifetime correlation spectroscopy (FCS) and multi-dimensional fluorescence lifetime microscopy; (3) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28G01J11/00G01N21/25G01N21/64
Inventor 翟光杰俞文凯王超
Owner NAT SPACE SCI CENT CAS
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