CN103868591A - Rapid non-scan multispectral imaging system and method thereof - Google Patents
Rapid non-scan multispectral imaging system and method thereof Download PDFInfo
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Abstract
The invention provides a rapid non-scan multispectral imaging system and a method thereof, and relates to the technical field of rapid non-scan multispectral imaging. The wide spectrum light source output end of the system is connected with the SMA interface end of a first fiber coupling mirror via a multimode quartz fiber. The optical center of the mirror surface end of the first fiber coupling mirror is respectively fit with the optical center of a first band-pass color filter and the optical center of the mirror surface end of a second fiber coupling mirror. The first band-pass color filter is arranged between the mirror surface end of the first fiber coupling mirror and the mirror surface end of the second fiber coupling mirror. The SMA interface end of the first fiber coupling mirror is connected with the input end of a dispersion fiber. The output end of the dispersion fiber is connected with the SMA interface end of a third fiber coupling mirror. An information acquisition mode of the compressed sensing theory is adopted so that rapid multispectral information acquisition is realized, a mechanical scanning structure in the spectrum information acquisition process is avoided, the structure of the image system is simplified and cost of the imaging system is reduced.
Description
Technical field
The present invention relates to quick non-scanning multi-optical spectrum imaging technology field, be specifically related to a kind of quick non-scanning multi-optical spectrum imaging system and method thereof based on compressive sensing theory.
Background technology
Multispectral imaging combines imaging technique and spectral measurement methods, and the information of obtaining not only comprises two-dimensional space information, also comprises the Spectral Radiation Information with Wavelength distribution, forms so-called " data cube ".This spectral image data has the characteristic of " collection of illustrative plates unification ", compare traditional single broadband detecting technique, abundanter target optical spectrum information can be provided, particularly have very important application in target detection technical fields such as target Material Identification, Anomaly target detection, camouflaged target identification, complex background inhibition.But the collection capacity of spectroscopic data is very huge, limits its imaging picking rate and had an information storage difficult problem.
Optical spectrum imagers mainly contains color dispersion-type, optical filter type and interference type imaging spectrometer at present, and all need to could form a complete spectrum picture by mechanical scanning, the about 10kHz of speed of mechanical scanning, frame frequency is less than 500fps, in the field of ask for something imaging real-time, as the activity in the motion of chemical reaction, particle flux, biological cell etc., in the experiment that particularly cannot repeat at some, the frame speed of traditional optical spectrum imagers cannot meet the demands.In 2005, Andy R doctor Harvey of Univ Heriot Watt of Britain has proposed a kind of two-dimension spectrum imaging system (IRIS) based on polarization spectro, this system has adopted N water polarizing prism and N filter plate structure, and thickness separately and distance are each other strictly calculated, realize in theory 100% optical efficiency, can obtain simultaneously
the spectrum picture of individual wave band.But this imaging device exists some intrinsic defects, such as for obtaining higher spectral resolution, just must reduce field angle; Imaging surface needs to use
piece detector receives two-dimension spectrum image, and whole imaging detector dimensions is increased, and frame frequency is appointed and depended on imaging detector.In addition, the Structure Calculation complexity of spectrum light splitting, when especially needing imaging wave band to increase, complex structure and space hold volume are large.
Summary of the invention
The object of this invention is to provide a kind of quick non-scanning multi-optical spectrum imaging system and method thereof, the information acquisition mode of its employing compressive sensing theory, not only realize fast multispectral acquisition of information, avoid the mechanical scanning structure in spectral information gatherer process simultaneously, simplify the structure of imaging system, reduced the cost of imaging system.
In order to solve the existing problem of background technology, the present invention adopts following technical scheme: its system comprises broad spectrum light source 1, the first fibre-coupled mirrors 2, the first band-pass filter 3, the second fibre-coupled mirrors 4, dispersive optical fiber 5, the 3rd fibre-coupled mirrors 6, LCD space light modulator 7, the first image-forming objective lens 8, the second image-forming objective lens 9, the second band-pass filter 10, high-speed photodiode 11, data acquisition module 12, computing machine 13, broad spectrum light source 1 output terminal is connected with the SMA interface end of the first fibre-coupled mirrors 2 by multimode silica fibre, the optical centre of the first fibre-coupled mirrors 2 minute surface ends coincide with the optical centre of the first band-pass filter 3 and the optical centre of the second fibre-coupled mirrors 4 minute surface ends respectively, the first band-pass filter 3 is positioned between the first fibre-coupled mirrors 2 minute surface ends and the second fibre-coupled mirrors 4 minute surface ends, the SMA interface end of the first fibre-coupled mirrors 2 is connected with the input end of dispersive optical fiber 5, the output terminal of dispersive optical fiber 5 is connected with the SMA interface end of the 3rd fibre-coupled mirrors 6, one side of the 3rd fibre-coupled mirrors 6 minute surface ends is placed LCD space light modulator 7 and the first image-forming objective lens 8 successively, the optical centre of the 3rd optical centre of fibre-coupled mirrors 6 minute surface ends and the optical centre of LCD space light modulator 7 and the first image-forming objective lens 8 coincide, the optical axis intersection of the second image-forming objective lens 9 and the first image-forming objective lens 8, target to be measured is positioned over the intersection point of the optical axis of the second image-forming objective lens 9 and the first image-forming objective lens 8, the second image-forming objective lens 9 is to this target imaging to be measured, imaging one side at the second image-forming objective lens 9 is placed the second band-pass filter 10 and high-speed photodiode 11 successively, the optical centre of the second image-forming objective lens 9 coincide with the optical centre of high-speed photodiode 11 light-sensitive surfaces and the optical centre of the second band-pass filter 10 respectively, high-speed photodiode 11 signal output parts are connected with data acquisition module 12 analog input ends by concentric cable, data acquisition module 12 output terminals are connected with computing machine 13 network ports, uploading data collection result, the synchronous output end mouth one of data acquisition module 12 is connected with LCD space light modulator 7 synchronous input end mouths by concentric cable, data acquisition module 12 synchronous output end mouths two are connected with broad spectrum light source 1 synchronous input end mouth by concentric cable.
The step of its light spectrum image-forming is as follows:
One, arrange and measure number of times M, will measure number of times input data acquisition module 12, the value of measuring number of times M is the more than 10% of all valid pixel numbers of spectrum picture;
Two, the synchronous output end mouth one of data acquisition module 12 sends synchronous control signal to the synchronous input end of LCD space light modulator 7, and the plate set controller of LCD space light modulator 7 produces the random modulation matrix of a width intensity and shown by the modulation face of LCD space light modulator 7;
Three, the synchronous output end mouth two of data acquisition module 12 sends synchronous control signal to the synchronous input end of broad spectrum light source 1, and broad spectrum light source 1 is subject to this synchronizing signal control to launch wide spectrum secondary color burst pulse;
Four, data acquisition module 12 starts the acquisition function of analog voltage input mouth, the analog voltage signal of high speed luminous point diode 11 being exported with fixed sampling frequency carries out sampling for N time and completing digitizing, the embedded controller internal memory that the result of N sampling is stored in to data acquisition module 12 with one-dimension array form, the value of sampling number N is the quantity of spectrum spectral coverage; the wide spectrum secondary color burst pulse that broad spectrum light source produces is carried out coupling matching by the first fibre-coupled mirrors and the second fibre-coupled mirrors and is entered dispersive optical fiber, the effect of dispersion of dispersive optical fiber forms polychrome broad pulse by the spectral component of this wide spectrum secondary color burst pulse at time domain broadening, that is: in polychrome broad pulse, do not there is in the same time different spectral components, this polychrome broad pulse forms the polychrome broad pulse area source of space uniform distribution and is incident to LCD space light modulator after the 3rd fibre-coupled mirrors, the random modulation matrix of intensity that LCD space light modulator forms forms this polychrome broad pulse area source modulation intensity Stochastic Modulation polychrome broad pulse area source and is projected to target to be measured by the first image-forming objective lens, the spectral space distributed intelligence of intensity Stochastic Modulation polychrome broad pulse area source and target to be measured itself interacts, the polychrome broad pulse of carrying this target optical spectrum space distribution information is back to high-speed photodiode by target to be measured, high-speed photodiode is carried out high-speed sampling to the polychrome broad pulse of returning, gather this polychrome broad pulse in energy distribution in the same time not, obtain the energy distribution of the different spectrum of target to be measured, complete single measurement process,
Five, change the random modulation matrix of intensity of LCD space light modulator, the measuring process of repeating step two to four, meets until measure number of times the measurement number of times requirement arranging in step 1;
Six, the M obtaining in a M measuring process one-dimension array is imported in computing machine 13 by the network port, formed the two-dimensional array of M × N by computing machine 13;
Seven, the data acquisition of collection is used based on
the convex optimized algorithm of Norm minimum, solves
model obtains the spectral space distributed intelligence of a target N to be measured wave band.
The present invention has following features: the information acquisition mode of (1), employing compressive sensing theory, not only realize fast multispectral acquisition of information, avoid the mechanical scanning structure in spectral information gatherer process simultaneously, simplify the structure of imaging system, replace array CCD by high-speed photodiode, reduce costs; (2), utilize dispersive optical fiber and compressive sensing theory, directly obtain two dimensional image, without complicated scanister and light-dividing device, simple in structure; (3) spectroscopic data gathering greatly reduces, and compressed in sampling process, without process Software Compression, the memory requirement of reduction.
Brief description of the drawings:
Fig. 1 is structural representation of the present invention.
Embodiment:
Referring to Fig. 1, this embodiment adopts following technical scheme: its system comprises broad spectrum light source 1, the first fibre-coupled mirrors 2, the first band-pass filter 3, the second fibre-coupled mirrors 4, dispersive optical fiber 5, the 3rd fibre-coupled mirrors 6, LCD space light modulator 7, the first image-forming objective lens 8, the second image-forming objective lens 9, the second band-pass filter 10, high-speed photodiode 11, data acquisition module 12, computing machine 13, broad spectrum light source 1 output terminal is connected with the SMA interface end of the first fibre-coupled mirrors 2 by multimode silica fibre, the optical centre of the first fibre-coupled mirrors 2 minute surface ends coincide with the optical centre of the first band-pass filter 3 and the optical centre of the second fibre-coupled mirrors 4 minute surface ends respectively, the first band-pass filter 3 is positioned between the first fibre-coupled mirrors 2 minute surface ends and the second fibre-coupled mirrors 4 minute surface ends, the SMA interface end of the first fibre-coupled mirrors 2 is connected with the input end of dispersive optical fiber 5, the output terminal of dispersive optical fiber 5 is connected with the SMA interface end of the 3rd fibre-coupled mirrors 6, one side of the 3rd fibre-coupled mirrors 6 minute surface ends is placed LCD space light modulator 7 and the first image-forming objective lens 8 successively, the optical centre of the 3rd optical centre of fibre-coupled mirrors 6 minute surface ends and the optical centre of LCD space light modulator 7 and the first image-forming objective lens 8 coincide, the optical axis intersection of the second image-forming objective lens 9 and the first image-forming objective lens 8, target to be measured is positioned over the intersection point of the optical axis of the second image-forming objective lens 9 and the first image-forming objective lens 8, the second image-forming objective lens 9 is to this target imaging to be measured, imaging one side at the second image-forming objective lens 9 is placed the second band-pass filter 10 and high-speed photodiode 11 successively, the optical centre of the second image-forming objective lens 9 coincide with the optical centre of high-speed photodiode 11 light-sensitive surfaces and the optical centre of the second band-pass filter 10 respectively, high-speed photodiode 11 signal output parts are connected with data acquisition module 12 analog input ends by concentric cable, data acquisition module 12 output terminals are connected with computing machine 13 network ports, uploading data collection result, the synchronous output end mouth one of data acquisition module 12 is connected with LCD space light modulator 7 synchronous input end mouths by concentric cable, data acquisition module 12 synchronous output end mouths two are connected with broad spectrum light source 1 synchronous input end mouth by concentric cable.
The minute surface end of the first described fibre-coupled mirrors 2 and the minute surface end of the second fibre-coupled mirrors 4 distance are greater than the focal length sum of the first fibre-coupled mirrors 2 and the second fibre-coupled mirrors 4, are less than the twice of the focal length sum of the first fibre-coupled mirrors 2 and the second fibre-coupled mirrors 4; The minute surface end distance of LCD space light modulator 7 and the 3rd fibre-coupled mirrors 6 is greater than the focal length of the 3rd fibre-coupled mirrors 6, is less than the twice of the 3rd fibre-coupled mirrors 6 focal lengths; The first image-forming objective lens 8 is the focal length of the first image-forming objective lens 8 with the distance of LCD space light modulator 7; The distance of the light-sensitive surface of high-speed photodiode 11 and the second image-forming objective lens 9 is the focal length of the second image-forming objective lens 9.
Described broad spectrum light source 1 adopts super continuum light spectrum light source, comprises TTL synchronous input end mouth, and the physical property of light pulse output is to adopt SMA optical fiber interface.The first fibre-coupled mirrors 2, the second fibre-coupled mirrors 4 and the 3rd fibre-coupled mirrors 6 adopt reflection type optical fiber coupling mirror, comprise SMA interface end.The first band-pass filter 3 and the second band-pass filter 10 adopt flat band-pass filter.LCD space light modulator 7 adopts intensity modulated formula LCD space light modulator, comprises plate set controller and TTL synchronous input end mouth.High-speed photodiode 11 adopts the broad-area photodiode with prime amplifier, and mode signal output is voltage-type, and interface adopts BNC connector, and output characteristics impedance is 50 ohm.Data acquisition module 12 adopts NI data acquisition module, comprises embedded controller, two synchronous input/output ports of TTL and an analog voltage and gathers port.
The quick non-scanning multi-optical spectrum imaging system of this embodiment based on compressive sensing theory, adopt compressed sensing sampling pattern, the corresponding random modulation matrix of intensity of each polychrome broad pulse is measured the energy distribution that collects the different spectrum of target to be measured by light velocity photodiode under the random modulation matrix of same intensity at every turn; Through repeated sampling (can be less than nyquist sampling number) repeatedly, complete target optical spectrum space distribution information to be measured collection, adopt the protruding optimum theory in compressive sensing theory to be reconstructed and finally to complete light spectrum image-forming process the data that collect.
The step of its light spectrum image-forming is as follows:
One, arrange and measure number of times M, will measure number of times input data acquisition module 12, the value of measuring number of times M is the more than 10% of all valid pixel numbers of spectrum picture;
Two, the synchronous output end mouth one of data acquisition module 12 sends synchronous control signal to the synchronous input end of LCD space light modulator 7, and the plate set controller of LCD space light modulator 7 produces the random modulation matrix of a width intensity and shown by the modulation face of LCD space light modulator 7;
Three, the synchronous output end mouth two of data acquisition module 12 sends synchronous control signal to the synchronous input end of broad spectrum light source 1, and broad spectrum light source 1 is subject to this synchronizing signal control to launch wide spectrum secondary color burst pulse;
Four, data acquisition module 12 starts the acquisition function of analog voltage input mouth, the analog voltage signal of high speed luminous point diode 11 being exported with fixed sampling frequency carries out sampling for N time and completing digitizing, the embedded controller internal memory that the result of N sampling is stored in to data acquisition module 12 with one-dimension array form, the value of sampling number N is the quantity of spectrum spectral coverage; the wide spectrum secondary color burst pulse that broad spectrum light source produces is carried out coupling matching by the first fibre-coupled mirrors and the second fibre-coupled mirrors and is entered dispersive optical fiber, the effect of dispersion of dispersive optical fiber forms polychrome broad pulse by the spectral component of this wide spectrum secondary color burst pulse at time domain broadening, that is: in polychrome broad pulse, do not there is in the same time different spectral components, this polychrome broad pulse forms the polychrome broad pulse area source of space uniform distribution and is incident to LCD space light modulator after the 3rd fibre-coupled mirrors, the random modulation matrix of intensity that LCD space light modulator forms forms this polychrome broad pulse area source modulation intensity Stochastic Modulation polychrome broad pulse area source and is projected to target to be measured by the first image-forming objective lens, the spectral space distributed intelligence of intensity Stochastic Modulation polychrome broad pulse area source and target to be measured itself interacts, the polychrome broad pulse of carrying this target optical spectrum space distribution information is back to high-speed photodiode by target to be measured, high-speed photodiode is carried out high-speed sampling to the polychrome broad pulse of returning, gather this polychrome broad pulse in energy distribution in the same time not, obtain the energy distribution of the different spectrum of target to be measured, complete single measurement process,
Five, change the random modulation matrix of intensity of LCD space light modulator, the measuring process of repeating step two to four, meets until measure number of times the measurement number of times requirement arranging in step 1.1;
Six, the M obtaining in a M measuring process one-dimension array is imported in computing machine 13 by the network port, formed the two-dimensional array of M × N by computing machine 13;
Seven, the data acquisition of collection is used based on
the convex optimized algorithm of Norm minimum, solves
model obtains the spectral space distributed intelligence of a target N to be measured wave band.
This embodiment has following features: the information acquisition mode of (1), employing compressive sensing theory, not only realize fast multispectral acquisition of information, avoid the mechanical scanning structure in spectral information gatherer process simultaneously, simplify the structure of imaging system, replace array CCD by high-speed photodiode, reduce costs; (2), utilize dispersive optical fiber and compressive sensing theory, directly obtain two dimensional image, without complicated scanister and light-dividing device, simple in structure; (3) spectroscopic data gathering greatly reduces, and compressed in sampling process, without process Software Compression, the memory requirement of reduction.
Embodiment:
The light spectrum image-forming step of the present embodiment is as follows:
1.1, arrange and measure number of times M, will measure number of times input data acquisition module 12, the value of measuring number of times M is 37% of all valid pixel numbers of spectrum picture;
1.2, the synchronous output end mouth one of data acquisition module 12 sends synchronous control signal to the synchronous input end of LCD space light modulator 7, the plate set controller of LCD space light modulator 7 produces the random modulation matrix of a width intensity and is shown by the modulation face of LCD space light modulator 7, and the plate set controller of LCD space light modulator 7 adopts C++ programming constructs random Gaussian square;
1.3, the synchronous output end mouth two of data acquisition module 12 sends synchronous control signal to the synchronous input end of broad spectrum light source 1, broad spectrum light source 1 is subject to this synchronizing signal control to launch wide spectrum secondary color burst pulse, broad spectrum light source 1 adopts the super continuum light spectrum light source (SC450-4) of fianium company, spectral range is 460nm～2 μ m, the wide spectrum secondary color burst pulse that broad spectrum light source 1 sends has the continuous spectrum of certain spectral shape by dispersive optical fiber 5 generate on time shaft, dispersive optical fiber 5 adopts Raman to amplify dispersive optical fiber (dispersive power: 11.76 ns/nm);
1.4, data acquisition module 12 starts the acquisition function of analog voltage input mouth, the analog voltage signal of high speed luminous point diode 11 being exported with fixed sampling frequency carries out sampling for N time and completing digitizing, the embedded controller internal memory that the result of N sampling is stored in to data acquisition module 12 with one-dimension array form, the value of sampling number N is 10;
1.5, the measuring process of repeating step 1.2 to 1.4, meets until measure number of times the measurement number of times requirement arranging in step 1.1;
1.6, the M obtaining in a M measuring process one-dimension array is imported in computing machine 13 by the network port, the LABVIEW software being carried by computing machine 13 forms the two-dimensional array of M × N, the data of sampling are stored in computing machine 13 with two-dimensional array form, and this two-dimensional array form is as follows:
Wherein M represents to measure through M stochastic matrix,
represent to measure N the sampled value collecting the i time;
1.7, by gather data importing in Matlab software, reconstruct the spectrum picture of each wave band by compressed sensing algorithm, compressed sensing algorithm adopt based on
the convex optimized algorithm of Norm minimum, its solving model is:
The spectrum picture reconstruction algorithm process flow diagram that in the present embodiment, spectral detection device adopts as shown in Figure 3, is first separated the image data in data storage cell by 1 ~ N wave band, form M measured value vector of j wave band, and its form is as follows:
Wherein
represent the measured value of j the wave band that the i time measuring process obtain.
Claims (6)
1. quick non-scanning multi-optical spectrum imaging system, the system that it is characterized in that it comprises broad spectrum light source (1), the first fibre-coupled mirrors (2), the first band-pass filter (3), the second fibre-coupled mirrors (4), dispersive optical fiber (5), the 3rd fibre-coupled mirrors (6), LCD space light modulator (7), the first image-forming objective lens (8), the second image-forming objective lens (9), the second band-pass filter (10), high-speed photodiode (11), data acquisition module (12), computing machine (13), broad spectrum light source (1) output terminal is connected with the SMA interface end of the first fibre-coupled mirrors (2) by multimode silica fibre, the optical centre of the first fibre-coupled mirrors (2) minute surface end coincide with the optical centre of the first band-pass filter (3) and the optical centre of the second fibre-coupled mirrors (4) minute surface end respectively, the first band-pass filter (3) is positioned between the first fibre-coupled mirrors (2) minute surface end and the second fibre-coupled mirrors (4) minute surface end, the SMA interface end of the first fibre-coupled mirrors (2) is connected with the input end of dispersive optical fiber (5), the output terminal of dispersive optical fiber (5) is connected with the SMA interface end of the 3rd fibre-coupled mirrors (6), one side of the 3rd fibre-coupled mirrors (6) minute surface end is placed LCD space light modulator (7) and the first image-forming objective lens (8) successively, the optical centre of the 3rd optical centre of fibre-coupled mirrors (6) minute surface end and the optical centre of LCD space light modulator (7) and the first image-forming objective lens (8) coincide, the optical axis intersection of the second image-forming objective lens (9) and the first image-forming objective lens (8), target to be measured is positioned over the intersection point of the optical axis of the second image-forming objective lens (9) and the first image-forming objective lens (8), the second image-forming objective lens (9) is to this target imaging to be measured, place successively the second band-pass filter (10) and high-speed photodiode (11) in imaging one side of the second image-forming objective lens (9), the optical centre of the second image-forming objective lens (9) coincide with the optical centre of high-speed photodiode (11) light-sensitive surface and the optical centre of the second band-pass filter (10) respectively, high-speed photodiode (11) signal output part is connected with data acquisition module (12) analog input end by concentric cable, data acquisition module (12) output terminal is connected with computing machine (13) network port, uploading data collection result, the synchronous output end mouth one of data acquisition module (12) is connected with LCD space light modulator (7) synchronous input end mouth by concentric cable, data acquisition module (12) synchronous output end mouth two is connected with broad spectrum light source (1) synchronous input end mouth by concentric cable.
2.
.the method of quick non-scanning multispectral imaging, is characterized in that its step of light spectrum image-forming is as follows:
One, arrange and measure number of times M, will measure number of times input data acquisition module (12), the value of measuring number of times M is the more than 10% of all valid pixel numbers of spectrum picture;
Two, (12 synchronous output end mouth one sends synchronous control signal to the synchronous input end of LCD space light modulator (7) to data acquisition module, and the plate set controller of LCD space light modulator (7) produces the random modulation matrix of a width intensity and shown by the modulation face of LCD space light modulator (7);
Three, the synchronous output end mouth two of data acquisition module (12) sends synchronous control signal to the synchronous input end of broad spectrum light source (1), and broad spectrum light source (1) is subject to this synchronizing signal control to launch wide spectrum secondary color burst pulse;
Four, data acquisition module (12) starts the acquisition function of analog voltage input mouth, with fixed sampling frequency, the analog voltage signal of high speed luminous point diode (11) output is carried out sampling for N time and completing digitizing, the embedded controller internal memory that the result of N sampling is stored in to data acquisition module (12) with one-dimension array form, the value of sampling number N is the quantity of spectrum spectral coverage; the wide spectrum secondary color burst pulse that broad spectrum light source produces is carried out coupling matching by the first fibre-coupled mirrors and the second fibre-coupled mirrors and is entered dispersive optical fiber, the effect of dispersion of dispersive optical fiber forms polychrome broad pulse by the spectral component of this wide spectrum secondary color burst pulse at time domain broadening, that is: in polychrome broad pulse, do not there is in the same time different spectral components, this polychrome broad pulse forms the polychrome broad pulse area source of space uniform distribution and is incident to LCD space light modulator after the 3rd fibre-coupled mirrors, the random modulation matrix of intensity that LCD space light modulator forms forms this polychrome broad pulse area source modulation intensity Stochastic Modulation polychrome broad pulse area source and is projected to target to be measured by the first image-forming objective lens, the spectral space distributed intelligence of intensity Stochastic Modulation polychrome broad pulse area source and target to be measured itself interacts, the polychrome broad pulse of carrying this target optical spectrum space distribution information is back to high-speed photodiode by target to be measured, high-speed photodiode is carried out high-speed sampling to the polychrome broad pulse of returning, gather this polychrome broad pulse in energy distribution in the same time not, obtain the energy distribution of the different spectrum of target to be measured, complete single measurement process,
Five, change the random modulation matrix of intensity of LCD space light modulator, the measuring process of repeating step two to four, meets until measure number of times the measurement number of times requirement arranging in step 1;
Six, the M obtaining in a M measuring process one-dimension array is imported in computing machine (13) by the network port, formed the two-dimensional array of M × N by computing machine (13);
Seven, the data acquisition of collection is used based on
the convex optimized algorithm of Norm minimum, solves
model obtains the spectral space distributed intelligence of a target N to be measured wave band.
3.
.quick non-scanning multi-optical spectrum imaging system according to claim 1, it is characterized in that LCD space light modulator (7) and the minute surface end distance of the 3rd fibre-coupled mirrors (6) are greater than the focal length of the 3rd fibre-coupled mirrors (6), are less than the twice of the 3rd fibre-coupled mirrors (6) focal length.
4.
.quick non-scanning multi-optical spectrum imaging system according to claim 1, is characterized in that the first image-forming objective lens (8) and the distance of LCD space light modulator (7) are the focal length of the first image-forming objective lens (8).
5.
.quick non-scanning multi-optical spectrum imaging system according to claim 1, is characterized in that the light-sensitive surface of high-speed photodiode (11) and the distance of the second image-forming objective lens (9) are the focal length of the second image-forming objective lens (9).
6. quick non-scanning multi-optical spectrum imaging system according to claim 1, it is characterized in that the minute surface end of the first fibre-coupled mirrors (2) and the minute surface end of the second fibre-coupled mirrors (4) distance are greater than the focal length sum of the first fibre-coupled mirrors (2) and the second fibre-coupled mirrors (4), are less than the twice of the focal length sum of the first fibre-coupled mirrors (2) and the second fibre-coupled mirrors (4).
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