Fax - ka been abuurtay ilaa maalinta la joogo

Fax (si kale loo dhigo - Telefoto) - a gudbinta long-distance of image a wali (text, sawirada, sawiro) la loo maqli xiga ee item ka helay. Taariikh ahaan ka horumarinta telegraphy keentay, laakiin waa inay awoodaan inay gudbiyaan noocyo badan oo macluumaad iyo waa more adkaysi u faragelin.

Fax waxaa loo isticmaalaa in lagu wareejiyo telegrams photo, la xilliyeedyada print baahsan (qalab kala iibsiga ee bogagga wargayska iyo sawirada), shirkadaha waaweyn ee is-dhaafsiga macluumaadka wax soo saarka, si ay u helaan xogta laga satalayt iyo saldhigyada cimilada (gidrometeokartami exchange), iyo sidoo kale xaaladaha kale oo badan.

hanaanka wareejinta waxaa lagu fuliyaa iyadoo la isticmaalayo mashiinka fax-ka (fax). Mabda'a hawlgalka ee fax ah waa sida soo socota: unit gudbiye ah soo saarta hoosaadka ka mid ah lagu kala qaado image (text, sawirada) Qaybo badan oo yar yar (meelaha hoose ee loo yaqaan ..), Kuwaasoo kala duwan yihiin midba midka kale in ay calaamad u gaar ah, sida caadiga ah by cufnaanta indhaha). Markaas xubno ka dhan israac diinta ka images graphic galay socodka karsado korontada. Warbixin ku saabsan waxyaabaha kala iibsiga waxaa loo kaydiyaa shuruudaha soo xulay.

Markaas fax sida taxane ah oo signallo koronto lagu kala qaado iyada oo loo marayo line isgaadhsiinta, taas oo u dhaqmo sida an khadka taleefanka caadiga ah. At qadanayo, isbedelka bedelka qaadataa meel iyadoo la ilaalinayo isku xigxiga oo ka mid ah xubno ka, oo sababtay in aan helo nuqul ka mid ah la doonayo image noo.

Mabda 'fax waxaa la aasaasay sannadkii 1855 by jirka Talyaaniga J. Caselli. qalab loogu talagalay iyaga si ay u gudbiyaan image codsatay in bireed a hogaanka la varnish gaar ah la conductivity korontada aad u yar yahay (ku dhowaad eber). Sayidka, image ah oo ka kooban xubno ka talantaalli sare (bireed) iyo conductivity hooseeyo. pin xiriirka, qiime on image kale u gudbin karsado hadda iyo calaamadaha hadda-free. image helay hab electrochemical diiwaan on bireed.

prototypes Kuwani of fax casriga ah loo isticmaalo si ay u gudbiyaan farriimo on khadadka telegaraafka ee Paris - Marseille iyo Moscow - St. Petersburg, laakiin si tartiib ah u noqdeen wax aan waxba sababtoo ah qaladaadkeyga iyo adayga habraaca gudbinta.

In 1868, B. Meier ayaa la Been abuurtay hab helo images oo waxaa lagu qoro on warqad cad la muquuninta ku noqnoqosho leh, daboolay rinjiga. Aarayo, dhagno warqadda at the daqiiqado midig, bidix tiro ka mid ah stroke, ka mid ah taas oo ay jirto image ah. Habkani, kaamil ah oo loo isticmaalo maanta.

In fax-ka qarnigii labaatanaad gaadhay si ay u soo bixitaanka of shabakad balaadhan oo ah khadadka isgaadhsiinta, been abuurtay ee tuubooyinka vacuum, helitaanka saamaynta photoelectric mahad heerka tayo ee cusub. In 30-ka mashiinada koobi ugu horeysay u muuqday in dalkeena. In mustaqbalka, isticmaalka qalabka sawiro iyo hababka loo isticmaalay adduunka oo dhan.

isgaarsiinta fax Modern waa la fuliyay oo macneheedu yahay khadadka gudbiye, aqbalana iyo isgaarsiinta a. At gudbiye ah, oo isku xigta kaalinta iftiin dhibic waddaa agagaarka dusha oo dhan asalka ah, waxaa qaybinaya qaybo hoose (pads) ee reflectivity iftiinka kala duwan. iyaga ka muuqataa, daadanayo iftiin ee adag variable ku dhacaa Converter ku photoelectric iyo beddelay signal video ah, ka dibna modulates gariirka ka (Ilodanimada ama inta jeer) si ay u turjumaan signal video galay haboon gudbinta badan qaab link a. Khadadka Isgaarsiinta - channels telefoonka St Paul ama wireless caadiga ah. In the case of gudbinta xaddi weyn oo macluumaad (bogagga wargayska, tusaale ahaan) iyadoo la isticmaalayo a isgaarsiinta multichannel la channels broadband.

At qadanayo, hay'adaha fax la sameeyo demodulation of signal ka helay (doorashada) iyo diinta dambe ee koobi la diiwaan on dhexdhexaad ah (m. E. Its convolution) ee isku xigxiga la mid ah sida asalka ah. Hababka lagu qoro signal helay:

- sawirkaagu (warqad sawir ama filim oo waxaa la dhigayaa in a cajalad light-dhagan). Xaaladdan oo kale, waa wax aan macquul aheyn in la xakameeyo tayada fariin ka helay ilaa habka of processing photochemical sida side.

- Electrochemical (image la saaray warqad gaar ah taas oo blackens marka hadda la soo maray waxaa iyada).

- khad - on warqad cad lahu qalin khad ama duuban.