Ntau hom lim thiab cov ntsiab lus tseem ceeb

Ntau hom lim thiab cov ntsiab lus tseem ceeb

Raws li txoj cai, cov ntxaij lim dej kho qhov muag tuaj yeem muab faib ua ntau hom, thiab cov khoom sib txawv ntawm cov ntxaij lim dej no tau qhia hauv qab no.

1. Absorption filter: Lub nqus lim yog tsim los ntawm kev sib xyaw tshwj xeeb dyes rau hauv cov khoom siv cob lossis iav.Raws li muaj peev xwm nqus tau lub teeb ntawm qhov sib txawv wavelengths, nws tuaj yeem ua lub luag haujlwm ntawm kev lim dej.Coloured iav lim yog cov khoom siv dav tshaj plaws hauv kev ua lag luam.Nws qhov zoo yog qhov ruaj khov, zoo ib yam, zoo nqaj zoo, thiab cov nqi tsim khoom tsawg, tab sis nws muaj qhov tsis zoo ntawm cov passband loj, uas tsis tshua muaj qis dua 30nm.

2. Kev cuam tshuam cov lim dej: Cov kev cuam tshuam lim tau txais cov txheej txheem ntawm lub tshuab nqus tsev, thiab txheej txheej ntawm cov yeeb yaj kiab kho qhov muag nrog cov tuab tshwj xeeb yog coated rau ntawm lub iav.Feem ntau ib daim iav yog ua los ntawm ntau txheej zaj duab xis, thiab lub hauv paus ntsiab lus ntawm kev cuam tshuam yog siv los ua kom tiav Tso cai rau lub teeb tsis nyob rau hauv ib qho tshwj xeeb spectral ntau dhau los.Muaj ntau hom kev cuam tshuam cov ntxaij lim dej, thiab lawv daim ntawv thov teb kuj txawv.Ntawm lawv, cov ntxaij lim dej feem ntau siv los cuam tshuam yog bandpass lim, lim lim, thiab lim dichroic.

(1) Bandpass Lim tsuas tuaj yeem xa lub teeb ntawm ib lub wavelength tshwj xeeb lossis nqaim band, thiab lub teeb sab nraum lub passband tsis tuaj yeem hla.Lub ntsiab ntsuas qhov muag ntawm cov lim bandpass yog: nruab nrab wavelength (CWL), ib nrab bandwidth (FWHM), thiab transmittance (T%).Raws li qhov loj ntawm bandwidth, nws tuaj yeem muab faib ua qhov nqaim-band lim nrog bandwidth tsawg dua 30nm;broadband lim nrog bandwidth ntau tshaj 60nm.

(2) Txiav-tawm lim (Cut-off filter) tuaj yeem faib cov spectrum rau hauv ob cheeb tsam.Lub teeb nyob rau hauv ib cheeb tsam tsis tuaj yeem dhau los ntawm cheeb tsam no, uas yog hu ua cheeb tsam txiav tawm, thaum lub teeb nyob rau lwm cheeb tsam tuaj yeem dhau los ntawm nws, uas yog hu ua cheeb tsam pass-band.Cov ntxaij lim dej uas raug txiav tawm yog cov lim dej ntev thiab cov lim dej luv.Ntev-yoj dhau lim lim: hais txog qhov tshwj xeeb wavelength range, qhov ntev-yoj kev taw qhia kis tau tus mob, thiab cov kev taw qhia luv-yoj raug txiav tawm, uas ua lub luag haujlwm ntawm kev cais luv-yoj.Short-wave pass filter: Short-wave pass filter yog hais txog qhov tshwj xeeb wavelength range, short-wave direction is transmission, and the long-wave direction is cut-off, uas plays lub luag hauj lwm ntawm kev sib cais ntev-yoj.

(3) Dichroic filter (Dichroic filter) tuaj yeem xaiv cov xim me me uas xav kom dhau lub teeb raws li qhov xav tau, thiab cuam tshuam lwm yam xim.Muaj qee yam kev lim dej: Cov lim dej tsis zoo (Neutral Density Filters), tseem hu ua cov yeeb yaj kiab attenuation, yog siv los tiv thaiv lub teeb pom kev zoo los ntawm kev puas tsuaj rau lub koob yees duab sensor lossis cov khoom siv kho qhov muag, thiab tuaj yeem nqus lossis cuam tshuam lub teeb uas tsis tau nqus. .Ib feem ntawm lub teeb kis tau tus mob uas uniformly txo cov transmittance nyob rau hauv ib feem ntawm lub spectrum.

Lub luag haujlwm tseem ceeb ntawm Fluorescence Filters yog cais thiab xaiv cov yam ntxwv band spectra ntawm lub teeb excitation thiab emitted fluorescence ntawm cov khoom nyob rau hauv biomedical fluorescence tshuaj xyuas thiab tsom xam system.Nws yog ib qho tseem ceeb siv nyob rau hauv biomedical thiab life science instruments.

Astronomy Filters yog ib hom lim uas siv los txo qhov cuam tshuam ntawm lub teeb paug ntawm kev yees duab zoo thaum lub sijhawm ua cov duab astronomical.

Cov ntxaij lim dej tsis sib xws feem ntau muab faib ua qhov nqus thiab cuam tshuam.Cov kev cuam tshuam nruab nrab uas muaj kev cuam tshuam txog kev lees paub los ntawm lub teeb sib txawv ntawm cov teeb pom kev yooj yim dua), feem ntau yuav tsum tau yooj yim rau cov teeb pom kev zoo thiab txo qhov kev sim , yog li Thov siv ABC series lub teeb lub teeb los sau cov teeb pom kev zoo.Absorptive neutral density filters feem ntau xa mus rau cov khoom nws tus kheej lossis tom qab qee lub ntsiab lus sib xyaw hauv cov khoom, uas nqus tau qee qhov tshwj xeeb wavelengths ntawm lub teeb, tab sis tsis muaj los yog me ntsis cuam tshuam rau lwm cov wavelengths ntawm lub teeb.Feem ntau, qhov kev puas tsuaj ntawm absorbing nruab nrab ntom ntom lim yog qis dua, thiab tom qab siv mus ntev, tej zaum yuav muaj cua sov, yog li yuav tsum tau saib xyuas thaum siv lawv.

Ntsiab Specifications rau Optical Lim

Passband: Qhov ntau ntawm wavelengths uas lub teeb tuaj yeem dhau los yog hu ua passband.

Bandwidth (FWHM): Bandwidth yog ib hom wavelength siv los sawv cev rau ib feem ntawm cov spectrum uas dhau los ntawm cov lim los ntawm qhov xwm txheej zog, qhia los ntawm qhov dav ntawm ib nrab ntawm qhov ntau dua transmittance, tseem hu ua ib nrab dav, hauv nm.Piv txwv li: lub ncov xa tawm ntawm lub lim yog 80%, ces 1/2 yog 40%, thiab sab laug thiab txoj cai wavelengths sib xws rau 40% yog 700nm thiab 750nm, thiab ib nrab bandwidth yog 50nm.Cov uas muaj ib nrab-dav tsawg dua 20nm yog hu ua nqaim-band lim, thiab cov uas muaj ib nrab-dav siab dua 20nm yog hu ua band-pass lim los yog wide-band pass lim.

Center wavelength (CWL): Xa mus rau qhov siab tshaj plaws kev sib kis wavelength ntawm lub bandpass lossis nqaim band lim, los yog lub ncov rov qab wavelength ntawm lub bandstop lim, qhov nruab nrab ntawm 1/2 wavelength ntawm lub ncov transmittance, uas yog, bandwidth Qhov nruab nrab ntawm hu ua central wavelength.

Transmittance (T): Nws yog hais txog lub peev xwm dhau ntawm lub hom phiaj band, qhia nyob rau hauv feem pua, piv txwv li: lub lim peak transmittance (Tp) > 80%, yog hais txog lub teeb uas tuaj yeem dhau los ntawm lim tom qab attenuation.Thaum tus nqi siab tshaj plaws yog siab tshaj 80%, qhov ntau dua qhov kev xa tawm, qhov zoo dua lub teeb kis tau tus mob.Kev txiav tawm ntau: Nws yog siv los sawv cev rau lub sijhawm wavelength ntawm lub zog spectral cheeb tsam poob los ntawm lub lim, uas yog, lub wavelength ntau sab nraum lub passband.Txiav tawm tus nqi (Block): Qhov sib kis tau raws li lub wavelength nyob rau hauv qhov kev txiav tawm, tseem hu ua Qhov kev txiav tawm qhov tob yog siv los piav txog qhov txiav tawm ntawm cov lim.Nws yog tsis yooj yim sua rau lub teeb transmittance mus txog 0. Tsuas yog los ntawm kev ua kom lub transmittance ntawm lub lim ze rau xoom yuav lub pliaj spectrum yuav zoo dua txiav tawm.Tus nqi txiav tawm tuaj yeem ntsuas los ntawm kev xa tawm, thiab tseem tuaj yeem qhia tau los ntawm qhov muag pom (OD).Kev sib raug zoo ntawm nws thiab transmittance (T) yog raws li nram no: OD = log10 (1 / T) Kev hloov pauv band dav: raws li lub lim Qhov kev txiav tawm qhov tob sib txawv, thiab qhov dav spectral ntau dua tso cai ntawm cov lim lim txiav- tawm qhov tob thiab 1/2 txoj hauj lwm ntawm qhov kawg ntawm qhov transmittance.Ntug steepness: ie [(λT80-λT10)/λT10] *

High Reflectance (HR): Feem ntau ntawm lub teeb dhau los ntawm lub lim yog reflected.

High transmittance (HT): Lub transmittance siab, thiab lub zog poob ntawm lub teeb hla lub lim yog tsawg heev.Lub kaum sab xis ntawm qhov xwm txheej: Lub kaum sab xis ntawm qhov teeb meem teeb meem thiab qhov qub ntawm lub lim dej yog hu ua lub kaum sab xis ntawm qhov xwm txheej.Thaum lub teeb tshwm sim vertically, lub kaum sab xis ntawm qhov xwm txheej yog 0 °.

Ua tau zoo aperture: Lub cev thaj chaw uas tuaj yeem siv tau zoo hauv cov khoom siv kho qhov muag yog hu ua qhov zoo aperture, uas feem ntau zoo ib yam li qhov loj ntawm lub lim, concentric, thiab me me me me.Pib wavelength: Qhov pib wavelength yog hais txog lub wavelength sib haum mus rau thaum lub transmittance nce mus rau 1/2 ntawm lub ncov nyob rau hauv lub long-wave pass lim, thiab tej zaum nws yuav txhais tau tias yog 5% los yog 10% ntawm lub ncov nyob rau hauv lub band- pass filter Lub wavelength sib haum mus rau transmittance.

Cut-off wavelength: Qhov kev txiav tawm wavelength yog hais txog lub wavelength sib haum mus rau thaum lub transmittance nyob rau hauv lub short-wave pass lim raug txo mus rau 1/2 ntawm lub ncov tus nqi.Nyob rau hauv lub band-pass lim, qee zaum nws tuaj yeem txhais tau tias yog qhov siab tshaj plaws ntawm 5% lossis 10%.Lub wavelength sib thooj rau tus nqi dhau.

Surface Specifications thiab Dimensional Parameters of Filters Surface Quality

Qhov zoo ntawm cov lim dej feem ntau muaj qhov tsis xws li khawb thiab qhov pits ntawm qhov chaw.Qhov feem ntau siv tshwj xeeb rau saum npoo zoo yog khawb thiab qhov pits teev los ntawm MIL-PRF-13830B.Lub npe ntawm lub pits yog xam los ntawm kev faib lub qhov taub nyob rau hauv microns los ntawm 10, feem ntau cov khawb qhov specification yuav raug hu ua tus qauv zoo nyob rau hauv thaj tsam ntawm 80 mus rau 50;qhov zoo nyob rau hauv thaj tsam ntawm 60 txog 40;thiab qhov ntau ntawm 20 mus rau 10 yuav suav hais tias yog qhov zoo tshaj plaws.

Surface quality: Nto zoo yog ib qho kev ntsuas ntawm qhov raug.Nws yog siv los ntsuas qhov sib txawv ntawm cov dav hlau xws li iav, qhov rais, prisms lossis daim iav tiaj tus.Qhov sib txawv ntawm smoothness feem ntau yog ntsuas los ntawm tus nqi corrugation (λ), uas yog tsim los ntawm cov kev sim nrog ntau lub wavelengths, ib kab txaij sib haum rau 1/2 wavelength, thiab smoothness yog 1λ, uas sawv cev rau qib zoo;qhov smoothness yog λ/4, uas sawv cev rau qib zoo;qhov smoothness yog λ/20, sawv cev rau qib high-precision zoo.

Kev kam rau siab: Lub siab ntev ntawm lub lim feem ntau yog nyob ntawm qhov nruab nrab wavelength thiab ib nrab-bandwidth, yog li qhov kev kam rau siab ntawm cov khoom lim tau qhia.

Txoj kab uas hla kev kam rau ua: Feem ntau, qhov kev ua siab ntev ntawm lub taub lim lim tsis zoo thaum siv, tab sis yog tias cov cuab yeej kho qhov muag yuav tsum tau muab tso rau ntawm lub tuav, txoj kab uas hla yuav tsum tau txiav txim siab.Feem ntau, qhov kam rau ntawm txoj kab uas hla hauv (± 0.1 hli) yog hu ua qhov zoo, (± 0.05 hli) yog hu ua precision zoo, thiab (± 0.01 hli) yog hu ua zoo.

Center Thickness Tolerance: Qhov nruab nrab tuab yog qhov tuab ntawm qhov nruab nrab ntawm lub lim.Feem ntau, qhov siab ntawm qhov chaw tuab (± 0.2mm) yog hu ua qhov zoo, (± 0.05mm) yog hu ua precision zoo, thiab (± 0.01mm) yog hu ua zoo.