Lub koob yees duab hyperspectral tuaj yeem sib txuas cov duab thev naus laus zis nrog spectral detection technology. Thaum ntsuas lub spatial nta ntawm lub hom phiaj, nws muaj peev xwm tsim ntau lub nqaim bands rau txhua qhov chaw pixel kom ua tiav cov kev pab cuam spectral tas li, thiab cov ntaub ntawv sib txawv spectral tuaj yeem cuam tshuam rau sab hauv ntawm cov khoom. qhov sib txawv ntawm lub cev qauv thiab tshuaj muaj pes tsawg leeg. Piv nrog rau ib txwm siv spatial ob-dimensional imaging, hyperspectral lub koob yees duab ib txhij tau txais cov ntaub ntawv spatial thiab spectral ntawm lub hom phiaj. Nyob rau hauv ib qho kev daws teeb meem spatial, nws tuaj yeem tau txais cov yam ntxwv tsis tu ncua ntawm cov khoom hauv ntau qhov spectral, uas tuaj yeem txhim kho qhov tseeb ntawm cov khoom. Kev txheeb xyuas kom raug thiab tshawb pom muaj txiaj ntsig zoo thiab tam sim no tau dhau los ua ib qho tseem ceeb ntawm kev txiav-ntug thev naus laus zis rau kev paub txog thaj chaw hauv av.
Nrog rau txoj kev loj hlob sai ntawm cov txheej txheem lim txheej, kev txhim kho ntawm lim spectroscopic hyperspectral koob yees duab tau txhawb nqa zoo heev. Qhov zoo ntawm lub teeb thiab me me tau dhau los ua ib feem tseem ceeb ntawm hyperspectral tej thaj chaw deb sensing payloads, thiab tau siv dav hauv kev sib txuas ntawm micro-nano satellite hyperspectral constellations.
According to Memes Consulting, recently, the research group of Liu Chunyu from the Changchun Institute of Optics, Fine Mechanics and Physics of the Chinese Academy of Sciences published a report on "The Development Status and Trends of Filter Spectroscopic Hyperspectral Cameras" in the journal "Infrared and Laser Engineering". article on the subject. Researcher Liu Chunyu is mainly engaged in the research of optical system design and overall design of optoelectronic system.
Schematic daim duab ntawm lub hauv paus ntsiab lus ntawm hyperspectral imaging
Qhov kev tshawb fawb no tsuas yog tshuaj xyuas cov lim dej-sib cais cov koob yees duab hyperspectral, thiab qhia txog cov lim dej ib txwm siv-sib cais qhov chaw ua haujlwm hyperspectral imaging payloads hauv tsev thiab txawv teb chaws, nrog rau cov lim- cais cov duab hyperspectral hauv qab kev loj hlob nyob rau hauv av. Cov kev daws teeb meem, cov ntsuas kev ua tau zoo thiab cov kev cia siab ntawm cov tshuab no tau txheeb xyuas, thiab cov yam ntxwv ntawm kev siv, qhov zoo thiab qhov tsis zoo ntawm lub koob yees duab hyperspectral raws li lub hauv paus ntsiab lus ntawm lim spectroscopy tau nthuav tawm. Thaum kawg, txoj kev loj hlob ntawm lim spectroscopy hyperspectral koob yees duab yog prospected.
Lub koob yees duab lim lub log hyperspectral siv lub log lim raws li lub teeb -splitting caij, thiab tau txais spectral dluab ntawm txawv wavelength bands los ntawm rotating lub lim log, yog li ua kom tiav cov splitting ntawm polychromatic lub teeb rau monochromatic teeb. Cov ntsiab lus tseem ceeb ntawm lub tshuab lim log hyperspectral lub koob yees duab yog lub log lim, uas tuaj yeem hloov lub log lim ntawm cov spectral sib xws raws li qhov sib txawv ntawm kev soj ntsuam. Txoj kev kho qhov muag yog qhov yooj yim thiab cov spectral band tuaj yeem hloov tau yooj yim. Nrog rau txoj kev loj hlob ntawm spectral imaging technology, tus naj npawb ntawm nrhiav bands yog nce, thiab lub lim log tsis tuaj yeem ua tau raws li qhov kev soj ntsuam ntawm dav spectrum thiab kev daws teeb meem siab, yog li nws yog ntau thiab ntau siv hauv ntau -spectral detection.
Tunable filter hyperspectral lub koob yees duab siv cov ntxaij lim dej tunable li spectroscopic Cheebtsam. Raws li txoj kev sib txawv, lawv tau muab faib ua kua siv lead ua kua tunable lim (LCTF) lub koob yees duab hyperspectral, acousto-optic tunable lim Acousto-Optic Tunable Filter (AOTF) lub koob yees duab hyperspectral, MEMS tunable FP kab noj hniav lim (MEMS Tunable Fabry-Perot Cavity Filters) lub koob yees duab hyperspectral.
Lub npoo -zoo li lub lim dej hyperspectral lub koob yees duab, tseem hu ua gradient lim hom hyperspectral lub koob yees duab, tuaj yeem ua tiav cov qauv txuas ntxiv hauv cheeb tsam spectral thiab cheeb tsam spatial. Nws lub tswv yim tsim yog siv ib tug wedge -zoo li tus multi- txheej nyias zaj duab xis nruab nrab raws li ib tug lim, Thiab nws yog ntsia nyob rau hauv txoj hauj lwm ze rau ob -dimensional array detector, yog li ntawd ob peb pixels ntawm lub detector sib haum mus rau ib tug tej yam spectral band ntawm lub gradient lim. Raws li cov kev sib raug zoo ntawm txhua lub wavelength band ntawm lub gradient lim thiab lub detector pixel, lub koob yees duab hyperspectral nrog gradient lim yuav muab faib mus rau hauv linear gradient hom thiab lim array hom.
Linear Gradient Filter Structure thiab Spectral Diagram
Quantum dots, also known as "nanocrystals", are inorganic materials with high intrinsic stability and a radius smaller than that of the bulk exciton Bohr radius. By integrating different types of quantum dots, simultaneous detection of different wavelengths can be achieved. The quantum dot spectrometer (CQD) is developed based on this principle. Spectrometers in the traditional concept are equipped with high-precision optical and mechanical components, which are bulky, expensive, and complex in structure, and their application fields are severely limited.
Schematic daim duab ze ntawm -infrared quantum dot spectrometer
Feem ntau, lub koob yees duab lim spectroscopic hyperspectral yog nyob rau hauv nws cov me nyuam mos, thiab nws cov kev daws teeb meem spectral tsis tuaj yeem muab piv nrog qhov siab -precision grating dispersion spectroscopic method. Txoj kev loj hlob dav dav ntawm cov koob yees duab hyperspectral, tshwj xeeb tshaj yog nrog kev txhim kho cov txheej txheem thev naus laus zis thiab cov khoom siv tshiab xws li quantum dots, spectral daws teeb meem thiab kev siv zog ntawm cov koob yees duab hyperspectral raws li txheej txheej tau zoo heev, thiab kev tshawb fawb thiab kev tsim kho cov nqi yuav tsum tau ua. nce ntxiv. Tsis tas li ntawd, kev sib xyaw ua ke ntawm cov lim dej thiab lub ntsuas ntsuas yuav ua kom zoo dua qhov kev daws teeb meem spectral ntawm lub kaw lus, uas tuaj yeem sib piv rau qhov siab -precision grating dispersion spectroscopy. Yog li ntawd, kev sib xyaw ua ke ntawm cov lim dej thiab cov khoom kuaj xyuas kuj yog hom txheej txheej. Ib qho kev txhim kho loj hauv cov koob yees duab spectral. Nws tsis yog qhov nyuaj kom pom tias kev txhim kho cov lim dej- hom koob yees duab hyperspectral yuav txhawb kev txhim kho subversive nyob rau hauv lub tshav pob ntawm hyperspectral imaging, thiab yog li tsav txoj kev loj hlob ntawm hyperspectral tej thaj chaw deb sensing technology rau micro-nano satellites , uas yuav nyob rau hauv orbit rau yav tom ntej constellation ntawm micro-nano hyperspectral satellites. Kev lag luam kev lag luam, ua haujlwm zoo dua rau kev lag luam hauv teb chaws thiab tsim lub hauv paus kev lag luam.
Txoj haujlwm no tau txais kev txhawb nqa los ntawm National Natural Science Foundation ntawm Tuam Tshoj (41504143), Kev Tshawb Fawb Kev Tshawb Fawb Cov Khoom Siv Txhim Kho ntawm Suav Academy ntawm Kev Tshawb Fawb (YJKYYQ20190044), Natural Science Foundation ntawm Anhui Province (1908085 ME135), thiab Youth Innovation Promotion Association Suav Academy ntawm Sciences (2016203).
