Yuav ua li cas yog ib tug optical disc? CD-ROM tsav, laser thiab lwm yam kho qhov muag discs

Nyob rau hauv peb lub neej peb yog nrees ib tug ntau yam ntawm cov ntaub ntawv ua thiab cia. Nyob rau hauv lub deb yav dhau los tau luam daim ntawv archives. Yuav ua li cas yog cov niaj hnub xov xwm?

Kho qhov muag tsav: lub keeb kwm ntawm creation

Tus thawj ntaus ntawv rau khaws cia kaw suab tau ua los ntawm Sony rov qab nyob rau hauv 1979. Nws yog sawv cev, raws li tam sim no, cov yas disc nrog ib tug yeej qhov nyob rau hauv lub center. Chiv nws twb siv tsuas yog rau cov ntaubntawv povthawj siv suab ntaub ntawv, thiab cov ntaub ntawv rau nws tau thov kom muaj ib qho kev txoj kev cai mem tes Code Tes taws los piav. Nws cov lus dag nyob rau hauv lub fact tias cov ntawv nyeem los yog lub suab kis tau los ntawm cov analog-rau-digital converter thiab hloov dua siab tshiab rau hauv ib lub txheej ntawm cov khoom.

Tom qab ntawd, nyob rau hauv 1982, lub teb chaws Yelemees pib loj zus tau tej cov CDs. Lawv yuav khaws ib tug ntau yam ntawm cov ntaub ntawv. Tsis ntev, lawv nyob rau hauv lub rhawv tsis tau tsuas yog cov suab paj nruag khw muag khoom noj.

Yuav ua li cas yuav txheej txheem ntawm lub CD? Bases siv rau manufacturing 1,2-millimeter thickness polycarbonate phaj ntawm 120 hli txoj kab uas hla, uas yog thawj coated nrog ib tug nyias txheej ntawm cov hlau (kub, txhuas, nyiaj thiab thiaj li nyob. D.), Thiab ces cov kua roj vanish. Cov ntaub ntawv yog muaj ntaub ntawv rau tus hlau nyob rau hauv daim ntawv ntawm qho to (indentations) extruded raws ib tug kauv txoj kev. Nyeem cov ntaub ntawv sau tseg rau tus kho qhov muag disk, Nws tshwm sim los ntawm txoj kev ntawm ib tug laser beam nrog ib tug wavelength ntawm 780 nm. Nws yog reflected ntawm tus nto ntawm lub phaj, nws alters lub theem thiab siv ntog rau lub pits. Txais kuj hu ua khoob ntawm lub pits. Kauj ruam suab khiav nyob rau hauv lub helix yog kwv yees li 1.6 microns.

Hom kho qhov muag discs

Muaj ob peb hom CD: Compact Disc (CD), Cov ntau yam Disc (DVD), Blu-duab tshav Disc (BD). Lawv tag nrho cov muaj ntau lub peev xwm los sau ntaub ntawv. Piv txwv li, DVD-discs yog ua nyob rau hauv lub peev xwm ntawm 4.3 mus 15,9 GB, thiab CD - tsuas yog 900 MB.

Nws kuj distinguished los ntawm cov ntaubntawv povthawj siv discs multiplicity: hluas thiab ntau yam. Nyob rau hauv xws xov xwm txawv zoo li tus nyem qauv ntawm qho to. Overwrite cov ntaubntawv povthawj siv yog tau ua tsaug rau cov organic khoom uas nyob rau hauv qhov kev txiav txim ntawm laser darkens thiab hloov reflectivity. Nyob rau hauv ntau parlance, tus txheej txheem no yog hu ua hlawv.

Lwm kho qhov muag xov xwm tej zaum yuav txawv daim ntawv no. Zoo li tus CDs (Zoo li tus CD) yog feem ntau siv nyob rau hauv kev lom zem ua lag ua luam raws li tus neeg saib xyuas ntawm lub thiab video ntaub ntawv. Lawv tuaj nyob rau hauv tej zoo (square, nyob rau hauv daim ntawv ntawm ib tug dav hlau los yog ib lub plawv). Siv lawv mus CD-ROM drives yog tsis pom zoo vim hais tias lawv muaj peev xwm rupture nyob speeds siab.

CD-ROMs thiab lawv hom

Kho qhov muag tsav CD-R yog ib cov cab kuj ntawm cov ntaub ntawv, uas yog nyeem ntawv nkaus xwb. Sau cov ntaub ntawv mus rau nws, koj muaj peev xwm ib zaug xwb tsis muaj txoj cai los kho kom raug thiab append. Chiv lub peev xwm ntawm cov discs mus txog xwb 650 MB los yog 74 feeb ntawm suab. Tam sim no muaj pab kiag li lawm uas yuav haum mus txog 900 MB ntawm cov ntaub ntawv. Qhov zoo ntawm qhov tseeb hais tias kev nyeem ntawv yuav txaus siab los ntawm tag nrho cov txheej txheem CD.

Nyob rau hauv tib tus nqi ntawm lub cim xeeb thiab cov laser muaj ib tug CD-RW, tsuas cov ntaub ntawv rau nws, koj muaj peev xwm sau ntau lub sij hawm (mus txog 1000 lub sij hawm). Ua li no, siv cov txheej txheem kev sau computer programs. Cov downside yog hais tias tsis yog tag nrho cov pab kiag li lawm yuav npaj mus ua hauj lwm nrog hom ntawv no. CD-RW yog ib nyuag ntau kim tshaj CD-R.

CDs uas muaj suab thiab video recordings tsis muaj tej degree ntawm kev tiv thaiv, lawv yuav tsum tau theej thiab dua. Tab sis hauv xov xwm nrog tej ntaub ntawv rau daim ntawv tiv thaiv StarForce technology.

ROM discs kaw nyob rau hauv lub Hoobkas thiab muaj peev xwm tsuas ua si rov qab cov ntaub ntawv. Kho kom raug cov tsheb no yog tsis yooj yim sua. Tab sis kho qhov muag RAM-hom ntaus ntawv yuav tsum sau dua tshiab mus txog 10,000 lub sij hawm, thiab lawv pab mus txog 30 xyoo. Cov discs no yog ua los rau ntxiv cartridges, lawv nyeem ntawv yog tsis txaus siab los ntawm cov pa drives.

DVD-muaj thiab lawv cov yam ntxwv

Cov ntau yam Disc yog ib cov multi-purpose cia nruab nrab. Nws qauv yog denser thiab muaj ib tug ntau ntawm cov ntaub ntawv (mus txog 15 GB). Xws li ib tug kho qhov muag disk tsa glued ua ke ob CD. Cia thiab kev nyeem ntawv ntawm ib tug loj ntim ntaub ntawv yog tau los ntawm kev siv liab laser, lub wavelength ntawm uas yog 650 nm thiab ib tug lens nrog ib tug tshaj plaws hais txog zauv aperture. DVD-discs muaj ib tug los yog ob tug cov ntaubntawv povthawj siv sab, raws li zoo raws li ib tug los yog ob tug ua hauj lwm khaubncaws sab nraud povtseg rau txhua sab. Cov ntsuas seb lawv muaj peev xwm.

Raws li nrog rau CD-discs, DVD raug muab faib ua ob peb tawm tswv yim. DVD-R los yog DVD + R yog ib cov cab kuj, uas yuav tsum tau ib zaug xwb ntaub ntawv kaw tseg. rau cov discs, cov ntaubntawv povthawj siv txheem yog tsim los ntawm Pioneer nyob rau hauv 1997. "Rho tawm" thiab "plus" pab kiag li lawm txawv cov duab paab txheej thiab ib tug tshwj xeeb npav.

Kho qhov muag Discs DVD RW (DVD + RW, DVD-RW) muaj lub peev xwm rewritable xov xwm. Thiab "plus" xov xwm tso cai rau koj kom hloov mus rau qhov tsim nyog qhov chaw nyob rau koj kev txiav txim. Universal drives pab kom daws tau qhov teeb meem ntawm incompatibility ntawm tswv yim (+ RW thiab -RW).

Yuav ua li cas yog hluav taws xob uas ua ntawv Blu lub Disc?

Qhov no hom ntawm kho qhov muag tsav tso cai rau koj mus khaws thiab sau cov ntaub ntawv ntawm ib tug kub ceev. Rau me nyuam cov lus qhia (txawm siab txhais video) siv xiav laser beam ntawm 405 nm, uas narrows ob kauv khiav. Cov ntaub ntawv uas yog heev ze rau txhua lwm yam, yog raug rau cov neeg kho tshuab kev puas tsuaj, li ntawd rau tus tsav yuav tsum tau kev pab tshwj xeeb. Tsis ntev los no manufactured tsheb nrog ib tug tshwj xeeb txheej uas yuav tsum wiped huv si nrog ib daim ntaub qhuav li ib txwm.

Muaj Blu-duab tshav discs pov tseg thiab reusable cov ntaubntawv povthawj siv, thiab multi-txheej (2 mus rau 4 khaubncaws sab nraud povtseg). Peev Xwm ntawm "laminate" carrier nce mus txog 128 GB. Yog li nws muaj ib tug qauv 12-cm inch. Ob-txheej txheem Blu-duab tshav Disc tuas txog li 50 GB ntawm cov ntaub ntawv. Nyob rau hauv txoj kev loj hlob yog ib tug ntaus ntawv nce mus txog muaj peev xwm ntawm 300-400 GB, uas muaj peev xwm nyeem niaj hnub drives. Rau video koob yees duab yog siv tus me txoj kab uas hla disks (80 mm) nrog ib tug cia muaj peev xwm ntawm 15 GB.

Rau kev tiv thaiv los ntawm Blu-duab tshav daim ntawv nruab nrog cov dej qhab nia ROM-Mark thiab technology Yuav Tsum Managed Copy.

Purpose MiniDVD-xov xwm

Kho qhov muag xov xwm Mini DVD yog ib tug me me daim ntawv luam ntawm cov pa Digital ntau yam Disc. Nws yog 8 cm nyob rau hauv lub cheeb thiab yog siv nyob rau hauv cov koob yees duab thiab camcorders. Tib mog disc tau tuav txog rau 1.4 GB ntawm cov ntaub ntawv, ntsig txog, ob-txoj kev - 2.8 GB. Nyob rau hauv hom ntawv lawv yog MiniDVD-R (sau ib zaug) thiab MiniDVD-RW (ntau).

Standard 12-nti tsav yog tsis npaj rau lub Mini DVD nyeem ntawv. Thaum uas siv cov xws discs nyob rau hauv lub laptop yuav tsum tau ua ntawv thov ntxaiv tsav lub cev muaj zog. Tej zaum kuj muaj teeb meem nrog rau cov kev nyeem ntawv ntawm cov ntaub ntawv cab kuj. Feem ntau nyob rau hauv xws li mob, lub computer qhia cov lus "tsis pom tus neeg tsav tsheb rau ib tug kho qhov muag tsav." Yuav kom daws tau qhov teeb meem, nrog ib txog tej programmer.