Dab tsi yog optical filter?

Muaj peb hom optical filters: shortpass lim, longpass lim, thiab bandpass lim.Lub shortpass lim tso cai luv wavelengths tshaj qhov txiav tawm wavelength kom dhau mus, thaum nws attenuates ntev wavelengths.Hloov pauv, lub lim dej longpass xa cov wavelengths ntev dua li qhov txiav-on wavelength thaum nws thaiv luv wavelengths.Lub lim bandpass yog lub lim uas tso cai rau ib qho chaw tshwj xeeb, lossis "band", ntawm wavelengths mus dhau, tab sis attenuates tag nrho cov wavelengths nyob ib ncig ntawm lub band.Lub lim dej monochromatic yog qhov xwm txheej hnyav ntawm lub lim bandpass, uas tsuas yog kis tau ntau qhov nqaim ntawm wavelengths.

Lub lim dej optical xaiv xa ib feem ntawm qhov kho qhov muag, thaum tsis lees txais lwm qhov.Feem ntau siv hauv microscopy, spectroscopy, tshuaj ntsuam xyuas, thiab tshuab pom.
Cov ntxaij lim dej kho qhov muag yog cov khoom siv passive uas tso cai rau kev sib kis ntawm ib qho wavelength tshwj xeeb lossis teeb tsa ntawm lub teeb ntawm lub teeb.Muaj ob chav kawm ntawm cov lim dej kho qhov muag uas muaj cov txheej txheem sib txawv ntawm kev ua haujlwm: cov lim dej nqus thiab cov lim dej dichroic.
Absorptive filters muaj txheej txheej ntawm cov khoom sib txawv ntawm cov organic thiab inorganic uas nqus tau qee qhov wavelengths ntawm lub teeb, yog li tso cai rau qhov xav tau wavelengths dhau mus.Txij li thaum lawv nqus lub teeb lub zog, qhov kub ntawm cov lim dej no nce thaum lub sijhawm ua haujlwm.Lawv yog cov ntxaij lim dej yooj yim thiab tuaj yeem muab ntxiv rau cov yas los ua cov lim dej tsawg dua li lawv cov iav-raws li counterparts.Kev ua haujlwm ntawm cov lim dej no tsis yog nyob ntawm lub kaum sab xis ntawm qhov teeb meem teeb meem tab sis nyob ntawm cov khoom ntawm cov khoom uas ua rau cov lim dej.Yog li ntawd, lawv yog cov lim dej zoo siv thaum pom lub teeb ntawm qhov tsis xav tau wavelength tuaj yeem ua rau lub suab nrov hauv cov teeb liab optical.
Cov lim dej Dichroic yog qhov nyuaj dua hauv lawv txoj haujlwm.Lawv muaj cov txheej txheem ntawm cov txheej txheem kho qhov muag nrog cov tuab tuab uas tau tsim los cuam tshuam qhov tsis xav tau wavelengths thiab xa mus rau qhov xav tau wavelength ntau yam.Qhov no yog ua tiav los ntawm kev ua rau qhov xav tau wavelengths cuam tshuam kev tsim kho ntawm sab kis ntawm lub lim, thaum lwm cov wavelengths cuam tshuam kev tsim kho ntawm sab kev xav ntawm lub lim.


Post lub sij hawm: Aug-02-2021