Cov lus piav qhia ntxaws ntxaws ntawm ntau hom kev teeb pom kev zoo rau optical microscopes
Thaum lub tshuab tsom iav thaum ntxov tso siab rau cov roj teeb thiab lub hnub ci ntuj, lawv cov khoom qub (tab sis feem ntau yog qhov tseeb) cov tshuab tsom iav muab cov khoom siv sab nraud ntawm qhov pom kev. Lawv feem ntau siv txoj hauv kev zoo tshaj plaws, xws li khaws lub teeb los ntawm lub rooj tsav xwm loj loj lossis kev xav ntawm lub hnub ci ntsa iab nyob rau hnub overcast. Hmoov tsis zoo, cov txheej txheem no tsis muab kev teeb pom kev ruaj ntseg thiab feem ntau thaj tsam ntawm thaj chaw saib illuminated zoo heev tshaj cov naj npawb aperture ntawm lub hom phiaj, ua rau glare thiab dej immersion.
Niaj hnub nimno microscopes feem ntau muaj lub teeb ci tseem ceeb uas tuaj yeem tswj tau mus rau qib siab. Qhov ntau tshaj plaws rau niaj hnub microscopes yog ib qho incandescent tungsten-halogen qhov muag teev nyob rau hauv ib lub tsev nyob, projecting lub teeb los ntawm lub condenser lens kom mloog zoo rau nws hauv qab theem. Lub teeb hluav taws xob yog tswj los ntawm qhov sib txawv ntawm rheostat, feem ntau yog muab tso rau hauv lub tshuab tsom iav. Qhia hauv daim duab 1 yog ib qho teeb pom kev zoo thiab vaj tse. Lub teeb lub teeb yog lub teeb tungsten-halogen uas ua haujlwm ntawm qhov hluav taws xob ncaj qha (DC) voltage ntawm 12 volts thiab tsim tawm txog li 100 watts ntawm lub zog rau teeb pom kev zoo. Lub teeb hluav taws xob yog tswj los ntawm DC lub zog hluav taws xob, feem ntau ua rau hauv lub tshuab hluav taws xob hauv tsev, nrog lub qhov hluav taws xob tswj qhov hluav taws xob, feem ntau yog lub potentiometer mounted qhov chaw ntawm lub tshuab tsom iav. Cov qij no ua kom muaj cua sov ntau heev thaum lub sijhawm ua haujlwm thiab cov vaj tsev tau muab nrog qee cov khaubncaws sab nraud povtseg los pab kom cov cua sov ntau dhau. Txoj hauj lwm ntawm lub teeb yog tswj los ntawm ib tug series ntawm knobs nyob rau sab ntawm lub illuminator vaj tse, los yog pre-centered rau cov vaj tse. Lub teeb los ntawm lub teeb yog coj los ntawm lub condenser lens mus rau lub hauv paus microscope, thiab tom qab ntawd dhau los ntawm sintered iav diffuser feem ntau ua ntej yuav tsom los ntawm lub aperture diaphragm ntawm lub condenser.
Incandescent Teeb - Cov teeb pom kev zoo raws li cov teeb pom kev zoo tungsten yog siv los ua qhov tseem ceeb ntawm kev teeb pom kev hauv lub tshuab tsom iav niaj hnub, tshwj tsis yog kev tshawb nrhiav fluorescence microscopy. Cov teeb no yog thermal hluav taws xob emitting ib tug nruam spectrum ntawm lub teeb, extending upwards li ntawm 300 nm mus rau 1200-1400 nm nyob rau hauv kev siv ntawm wavelengths centered nyob rau hauv lub cheeb tsam 600-1200 nm, feem ntau yog illustrated nyob rau hauv daim duab 2. Lawv yog qhov yooj yim hauv kev tsim, kev tsim kho thiab kev ua haujlwm, suav nrog lub iav kaw qhov muag uas muaj cov roj inert thiab muaj cov tungsten filament energized los ntawm DC tam sim no. Lub teeb lub teeb tsim hluav taws xob ntau thiab lub teeb, tab sis tsuas yog 5 mus rau 10 feem pua ntawm cov khoom siv hluav taws xob tso nyiaj rau lub teeb. Tungsten teeb (tab sis tsis yog tungsten-halogen teeb) zoo sib xws hauv kev ua haujlwm rau cov khoom siv hauv tsev zoo tib yam, xws li, yuav raug kev txom nyem los ntawm qee qhov tsis zoo xws li blackening ntawm lub hnab ntawv nrog lub hnub nyoog thiab evaporation ntawm maj mam tso tungsten. Cov xim kub thiab ci ntsa iab ntawm cov teeb no sib txawv nrog cov khoom siv hluav taws xob, tab sis qhov nruab nrab qhov tseem ceeb ntawm kwv yees li 2200 K txog 3400 K. Photomicrographic xim zaj duab xis siv rau hauv cov teeb no yuav tsum siv lub tshuab tsom iav uas tsim cov xim kub uas phim lub teeb. Voltage membrane emulsions, feem ntau ntawm 3150 K thiab 3250 K. Qhov chaw nyob rau hauv qhov ntau ntawm, feem ntau, cov xim kub yuav tsum yog photomicrographically fine-tuned rau qhov sib npaug los ntawm kev ntxig cov lim rau hauv txoj kev teeb. Xim kub ntawm zaj duab xis emulsion rau teeb pom kev zoo.
Tungsten teeb sib txawv hauv lawv cov qauv tsim thiab cov chaw tsim khoom thiab muaj ntau yam qauv uas muaj ntau lub hnab ntawv, mounting fixtures thiab filament npaj. Ib qho kev xaiv ntawm tungsten teeb siv nyob rau hauv optical microscopy yog pom nyob rau hauv daim duab 3. Lub teeb nyob rau hauv (a) yog ib tug 6-12 volt square tungsten teeb nrog ib tug bronze bayonet puag thiab yog tsim los siv nrog rau qhov kawg ntawm lub cylindrical. qhov muag ntsia lub condenser lens. (b) Lub hnab ntawv puag ncig lub teeb tseem muaj lub hauv paus bronze bayonet, tab sis qhov tsis tshua muaj zog 6 volt noob tuaj yeem tso qhov project teeb lossis tso nws rau sab lossis thaum kawg. Lub teeb nyob rau hauv (c) kuj muaj ib lub hnab ntawv ncig, tab sis yog haum nrog lub hauv paus threaded. Kev khiav hauj lwm voltage ntawm 6 thiab 30 volts, lub teeb no yog tsim los siv rau ntawm ib kawg.
