Thaum koj saib cov khoom muag, koj yuav pom tias muaj ob hom: tsoos, chunky sawv daws yuav thiab slim, stylish sawv daws yuav.
Qhov loj, cov pa uas koj yuav pom hauv cov duab kos yog hu ua Porro Prism binoculars. Lwm yam, slim hom hu ua Roof Prism binoculars, los yog Dach Prism binoculars hauv German.
Raws li lub npe implies, lub ru tsev prism binoculars yog tus cwj pwm los ntawm lub ru tsev zoo li ib feem. Kuj ceeb tias, Roof Prism tsim twb muaj nyob rau hauv lub xyoo pua puv 19, tsuas yog ob peb xyoos tom qab Porro Prism binoculars tau tsim.
Tsis ntev los no, Roof Prism binoculars tau dhau los ua neeg nyiam tshaj Porro Prism vim lawv cov qauv tsim stylish. Hauv tsab ntawv no, kuv yuav piav qhia nrog cov duab li cas Roof Prism binoculars ua haujlwm.
Dab tsi yog hauv Roof Prism binoculars?
Muaj ob peb hom Ru Tsev Prism tsim, xws li Abbe-Koenig thiab Schmidt-Pechan. Txhua tus qauv tsim muaj nws qhov zoo, tab sis tus qauv Shmidt-Pechan Prism feem ntau yog siv rau hauv ob lub koob yees duab.
Ntawm no yog txoj kev kho qhov muag ntawm Roof Prism binoculars (Schmidt-Pechan tsim). Nco ntsoov tias cov kev xav tau yog qhov nyuaj heev ntawm no.
Lub prism yog ntsia tshaj lub hom phiaj lens.
Hauv daim duab no (hauv qab no), muaj qhov pom tseeb peb qhov kev xav hauv Shmidt prism, tab sis qhov tseeb, plaub qhov kev xav tshwm sim.
Lub Shmidt prism muaj ib lub ru tsev qhov twg daim duab yog tig 180 degrees thiab flipped horizontally nyob rau tib lub sij hawm. Qhov no ua rau cov chaw tsim khoom ua kom lub koob yees duab compact dua.
Cov prisms no ua lub luag haujlwm tseem ceeb los ntawm kev tig cov duab 180 degrees kom tau txais cov duab ncaj.
Txij li thaum muaj teeb pom kev ncaj qha mus rau lub ru tsev, uas tsis tuaj yeem cuam tshuam, qhov nqaim ntawm lub ru tsev, qhov zoo dua. Tsis tas li ntawd, cov neeg tsim khoom yuav tsum tau ua kom lub ntsej muag zoo kawg nkaus, uas yuav siv sijhawm ntev heev.
Nov yog qee cov duab los pab koj nkag siab qhov nyuaj ntawm kev ua Roof Prisms.
Daim duab no yog coj los ntawm ib daim iav. Cov duab yog flipped horizontally.
Daim duab tom ntej yog tig rau ob daim iav, ua ke zoo li lub ru tsev prism. Daim duab tau tig 180 degrees thiab tig rov qab ob zaug (rov qab mus rau qhov qub).
Yog tias lub kaum sab xis ntawm cov iav no tsawg dua 90 degrees, qhov nruab nrab ntawm daim duab ploj.
Ntawm qhov tsis sib xws, yog lub kaum sab xis ntau dua 90 degrees, daim duab tau sib cais.
Raws li koj tuaj yeem pom, lub kaum sab xis ntawm lub ru tsev yuav tsum yog 90 degrees. Lub kaum sab xis yuav tsum yog nyob rau hauv 0.0089 degrees, uas coj cov nqi tsim khoom.
Thaum lub ru tsev prism tsim muaj txiaj ntsig zoo rau kev ua kom txoj hauv kev ntawm lub teeb ncaj thiab ua rau cov duab sab xis, tsim cov ru tsev prisms yuav tsum tau tsim tshwj xeeb cov txheej txheem ntawm tus nqi siab dua.
Qhov twg zoo dua, Roof Prism lossis Porro Prism?
Nyob rau hauv Porro prisms, lub teeb yog reflected los ntawm 'tag nrho kev xav,' uas txhais tau tias tsis muaj kev poob hauv lub teeb transmittance. Txawm li cas los xij, hauv Roof Prism binoculars, tag nrho cov kev xav tsis tuaj yeem tshwm sim hauv qhov kev xav thib ob ntawm Shmidt prism, vim tias lub kaum sab xis ntawm lub teeb tsawg dua qhov xwm txheej kaum.
Yog li ntawd, lub ru tsev ib feem yuav tsum tau coated zoo li daim iav, uas ua rau ib tug poob ntawm lub teeb transmittance. Qhov no yog qhov teeb meem loj ntawm Roof Prisms.
Rau ntau lub koob yees duab zoo, cov iav nyiaj iav yog siv rau kev xav tau siab, txawm tias tus nqi siab hauv lub teeb ploj. Niaj hnub no, qee cov tuam txhab kho qhov muag siv cov txheej txheem dielectric prism, uas ua rau muaj kev cuam tshuam zoo heev ntawm ntau dua 99%.
Qhov thib ob qhov teeb meem loj nrog Roof Prism tsim yog qhov hloov pauv theem uas tshwm sim tom qab ntau qhov kev xav sab hauv. Cov theem hloov ua rau qhov sib piv tsawg dua thiab kev daws teeb meem qis dua.
Saib ntawm lub teeb pom kev los ntawm ib khub qub ntawm lub ru tsev prism binoculars (hauv qab), koj yuav pom dab ntxwg nyoog.
Txhawm rau tiv thaiv qhov no thiab ua kom qhov sib txawv, qee lub koob yees duab zoo siv cov txheej txheem kho, uas tsis tso cai rau cuam tshuam. Qhov hloov pauv theem no tsis tshwm sim nrog Porro Prisms.
Vim yog cov laj thawj uas tau hais los saum no, Roof Prism binoculars zoo tuaj yeem kim heev. Lub ntsiab kom zoo dua ntawm Roof Prism binoculars yog lawv slim thiab compact lub cev.
Txawm li cas los xij, raws li kev tsim cov txheej txheem ua kom zoo dua qub, Roof Prism binoculars tau dhau los ua tus nqi qis. Nrog lub koob yees duab loj dua, Porro Prisms hnyav dua Roof Prism binoculars.
Hauv kuv lub tswv yim, raws li qhov aperture tau loj dua, Roof Prism binoculars muaj qhov zoo dua vim lawv qhov hnyav dua. Thaum kuv ntsia saum ntuj hmo ntuj nrog kuv 7 × 50 Porro Prism khub (tshaj 1 kilogram), kuv txhais caj npab tau nkees sai sai.
Sab laug: 8 × 42 Roof Prism (lub Schmidt Pechan), Nruab Nrab: 7 × 42 Roof Prism (lub Abbe-Koenig), Txoj Cai: 8.5 × 44 Regular Porro.
Ntawm qhov tsis sib xws, nrog lub koob yees duab compact, Mini Porro Prism designs muaj qhov zoo dua Roof Prisms hauv feem ntau. Mini Porro binoculars twb tau cog lus thiab lub teeb, thiab lawv tsis tshua kim dua li Roof Prism tsim.
Cov ntsiab lus
Muaj ob hom koob yees duab: Porro Prism thiab Roof Prism binoculars. Roof Prism binoculars tseem hu ua Dach Prism hauv German. Nrog ru tsev prisms, txoj kev kho qhov muag yuav ncaj, uas ua rau lub cev slim thiab compact.
Txawm li cas los xij, Roof Prisms yog kim dua Porro Prisms tsis yog vim lawv qhov kev ua tau zoo tab sis vim yog qhov nyuaj hauv kev tsim khoom.
Thaum Porro Prisms ua kom txhua lub teeb pom kev los ntawm 'tag nrho kev xav,' Schmidt Prism tsim muaj ib qho kev xav, hauv lub ru tsev, uas ua rau lub teeb xa hluav taws xob tsawg.
Tsis tas li ntawd, cov kev xav sab hauv tuaj yeem ua rau muaj kev cuam tshuam, uas tuaj yeem cuam tshuam tsis zoo rau daim duab.
Yog tias koj tsis paub meej qhov twg yuav, Porro Prism lossis Roof Prism, nws yuav nyob ntawm qhov aperture. Rau cov koob yees duab loj, lub teeb yuag ntawm Roof Prism tsim yog qhov zoo dua. Txawm li cas los xij, cov koob yees duab compact twb tau teeb txaus, yog li lawv tsis xav tau ru tsev prisms kim.
Porro thiab Roof prism designs muaj qhov zoo thiab qhov tsis zoo. Nws yog ib qho tseem ceeb kom paub qhov sib txawv ua ntej yuav cov tsom iav tsom iav.