{"id":11673,"date":"2018-08-14T14:20:51","date_gmt":"2018-08-14T10:50:51","guid":{"rendered":"https:\/\/www.pixel.ir\/blog\/?p=11673"},"modified":"2018-08-14T14:37:21","modified_gmt":"2018-08-14T11:07:21","slug":"autofocus-systems","status":"publish","type":"post","link":"https:\/\/www.pixel.ir\/blog\/autofocus-systems\/","title":{"rendered":"\u062f\u0648\u0631\u0628\u06cc\u0646\u200c\u0647\u0627\u06cc \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u0686\u06af\u0648\u0646\u0647 \u0628\u0647 \u0635\u0648\u0631\u062a \u062e\u0648\u062f\u06a9\u0627\u0631 \u0641\u0648\u06a9\u0648\u0633 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f\u061f"},"content":{"rendered":"

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<\/p>\n

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 <\/p>\n

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\u0627\u0646\u0648\u0627\u0639 \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631<\/strong><\/p>\n

\u0633\u06cc\u0633\u062a\u0645 \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631 \u0627\u06a9\u062a\u06cc\u0648 Active AF<\/strong><\/p>\n

\u062f\u0631 \u0627\u06cc\u0646 \u0633\u06cc\u0633\u062a\u0645 \u0641\u0648\u06a9\u0648\u0633 \u0627\u062a\u0648\u0645\u0627\u062a\u06cc\u06a9\u060c \u0641\u0627\u0635\u0644\u0647 \u0627\u0632 \u0633\u0648\u0698\u0647 \u06a9\u0627\u0645\u0644\u0627\u064b \u0645\u0633\u062a\u0642\u0644 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u0627\u067e\u062a\u06cc\u06a9\u06cc \u062f\u0648\u0631\u0628\u06cc\u0646 \u0645\u062d\u0627\u0633\u0628\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f \u0648 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0622\u0646 \u0644\u0646\u0632 \u0628\u0631 \u0631\u0648\u06cc \u0633\u0648\u0698\u0647 \u0641\u0648\u06a9\u0648\u0633 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0631\u0627\u0647\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641\u06cc \u0628\u0631\u0627\u06cc \u0627\u0646\u062f\u0627\u0632\u0647\u200c\u06af\u06cc\u0631\u06cc \u0641\u0627\u0635\u0644\u0647 \u0633\u0648\u0698\u0647 \u062a\u0627 \u062f\u0648\u0631\u0628\u06cc\u0646 \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f \u06a9\u0647 \u0627\u0632 \u0645\u06cc\u0627\u0646 \u0622\u0646\u200c\u0647\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0648\u062c \u0627\u06cc\u0646\u0641\u0631\u0627\u0631\u062f \u06cc\u0627 \u0627\u0645\u0648\u0627\u062c \u0645\u0627\u0641\u0648\u0642 \u0635\u0648\u062a \u0627\u0634\u0627\u0631\u0647 \u06a9\u0631\u062f. \u062f\u0631 \u0627\u06cc\u0646 \u0631\u0648\u0634 \u0627\u0645\u0648\u0627\u062c \u0628\u0647 \u0633\u0648\u06cc \u0633\u0648\u0698\u0647 \u062a\u0627\u0628\u0627\u0646\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f \u0648 \u0628\u0627 \u062a\u0648\u062c\u0647 \u0628\u0647 \u062a\u0623\u062e\u06cc\u0631\u06cc \u06a9\u0647 \u062f\u0631 \u0628\u0627\u0632\u062a\u0627\u0628 \u0622\u0646 \u062f\u0631\u06cc\u0627\u0641\u062a \u0645\u06cc\u200c\u06a9\u0646\u062f\u060c \u0641\u0627\u0635\u0644\u0647 \u0627\u0632 \u0633\u0648\u0698\u0647 \u0645\u062d\u0627\u0633\u0628\u0647 \u0634\u062f\u0647 \u0648 \u062f\u0648\u0631\u0628\u06cc\u0646 \u0628\u0631 \u0631\u0648\u06cc \u0633\u0648\u0698\u0647 \u0641\u0648\u06a9\u0648\u0633 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u062f\u0631 \u062f\u0648\u0631\u0628\u06cc\u0646\u200c\u0647\u0627\u06cc \u067e\u0648\u0644\u0627\u0631\u0648\u06cc\u062f \u0645\u062b\u0644\u0627\u064b Sx-70 \u0627\u0632 \u0627\u06cc\u0646 \u0631\u0648\u0634 \u0628\u0647 \u0637\u0631\u0632 \u0645\u0648\u0641\u0642\u06cc\u062a \u0622\u0645\u06cc\u0632\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u062f. \u062f\u0631 \u0646\u0645\u0648\u0646\u0647\u200c\u0627\u06cc \u062c\u062f\u06cc\u062f\u200c\u062a\u0631 \u0645\u062b\u0644 \u062f\u0648\u0631\u0628\u06cc\u0646\u200c\u0647\u0627\u06cc \u06a9\u0627\u0645\u067e\u06a9\u062a \u0646\u06cc\u06a9\u0648\u0646<\/a> 35TiQD \u0648 \u06a9\u0627\u0646\u0646<\/a> AF 35M \u0648 Contax T2 \u0627\u0632 \u062a\u0627\u0628\u0634 \u0646\u0648\u0631 \u0627\u06cc\u0646\u0641\u0631\u0627\u0631\u062f \u0628\u0631\u0627\u06cc \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a. \u06cc\u06a9\u06cc \u0627\u0632 \u0645\u0639\u0627\u06cc\u0628 \u0627\u06cc\u0646 \u0633\u06cc\u0633\u062a\u0645 \u06a9\u0646\u062f\u06cc \u0646\u0633\u0628\u06cc \u0622\u0646 \u0627\u0633\u062a \u0686\u0631\u0627 \u06a9\u0647 \u0628\u0627\u06cc\u062f \u0627\u0628\u062a\u062f\u0627 \u0628\u0627 \u06cc\u06a9 \u0633\u06cc\u0633\u062a\u0645 \u0627\u0644\u06a9\u062a\u0631\u0648\u0645\u063a\u0646\u0627\u0637\u06cc\u0633\u06cc \u0641\u0627\u0635\u0644\u0647 \u0631\u0627 \u0628\u0633\u0646\u062c\u062f \u0648 \u0628\u0639\u062f \u0627\u0632 \u0622\u0646 \u0628\u0627\u06cc\u062f \u0633\u06cc\u0633\u062a\u0645 \u0627\u067e\u062a\u06cc\u06a9\u06cc \u062f\u0648\u0631\u0628\u06cc\u0646 \u0628\u0631\u0627\u06cc \u0641\u0648\u06a9\u0648\u0633 \u062f\u0642\u06cc\u0642 \u062a\u0646\u0638\u06cc\u0645 \u0634\u0648\u062f.<\/p>\n

\"pentax_me-f_autofocus\"
\u062f\u0648\u0631\u06cc\u0628\u0646 SLR \u067e\u0646\u062a\u0627\u06a9\u0633 ME F \u06a9\u0647 \u0645\u062c\u0647\u0632 \u0628\u0647 \u0633\u06cc\u0633\u062a\u0645 \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631 Passive \u0627\u0633\u062a.<\/strong><\/figcaption><\/figure>\n

\u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631 \u063a\u06cc\u0631 \u0641\u0639\u0627\u0644 Passive AF<\/strong><\/p>\n

\u062f\u0631 \u0627\u06cc\u0646 \u0646\u0648\u0639 \u0631\u0648\u0634 \u0627\u062a\u0648\u0641\u0648\u06a9\u0648\u0633\u060c \u062f\u0648\u0631\u0628\u06cc\u0646 \u0647\u06cc\u0686 \u0645\u0648\u062c \u0648 \u0627\u0646\u0631\u0698\u06cc \u0631\u0627 \u0628\u0647 \u0633\u0645\u062a \u0633\u0648\u0698\u0647 \u0633\u0627\u0637\u0639 \u0646\u0645\u06cc\u200c\u06a9\u0646\u062f \u0648 \u0628\u0627 \u062a\u0648\u062c\u0647 \u0628\u0647 \u0622\u0646\u0627\u0644\u06cc\u0632 \u062a\u0635\u0648\u06cc\u0631 \u0634\u06a9\u0644 \u06af\u0631\u0641\u062a\u0647 \u0628\u0631 \u0631\u0648\u06cc \u0633\u0646\u0633\u0648\u0631\u060c \u062f\u0648\u0631\u0628\u06cc\u0646 \u0628\u0647 \u06cc\u06a9 \u0641\u0648\u06a9\u0648\u0633 \u062f\u0642\u06cc\u0642 \u0645\u06cc\u200c\u0631\u0633\u062f. \u0627\u0644\u0628\u062a\u0647 \u062f\u0631 \u0627\u06cc\u0646 \u0631\u0648\u0634 \u0627\u0632 \u0641\u0648\u06a9\u0648\u0633 \u0627\u062a\u0648\u0645\u0627\u062a\u06cc\u06a9\u060c \u062f\u0631 \u0645\u0648\u0627\u0642\u0639\u06cc \u06a9\u0647 \u0646\u0648\u0631 \u0645\u062d\u06cc\u0637 \u06a9\u0645 \u0628\u0627\u0634\u062f \u0648 \u062a\u0635\u0648\u06cc\u0631 \u062b\u0628\u062a \u0634\u062f\u0647 \u0628\u0631 \u0631\u0648\u06cc \u0633\u0646\u0633\u0648\u0631 \u0627\u0632 \u0648\u0636\u0648\u062d \u06a9\u0627\u0645\u0644\u06cc \u0628\u0631\u062e\u0648\u0631\u062f\u0627\u0631 \u0646\u0628\u0627\u0634\u062f \u0628\u0627\u06cc\u062f \u0627\u0632 \u06cc\u06a9 \u0633\u06cc\u0633\u062a\u0645 \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631 \u0641\u0639\u0627\u0644 \u06a9\u0645\u06a9 \u06af\u0631\u0641\u062a. \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631 \u063a\u06cc\u0631 \u0641\u0639\u0627\u0644 \u0628\u0647 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641\u06cc \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc\u200c\u06af\u06cc\u0631\u062f \u06a9\u0647 \u062f\u0631 \u0627\u062f\u0627\u0645\u0647 \u0628\u0647 \u0622\u0646 \u062e\u0648\u0627\u0647\u06cc\u0645 \u067e\u0631\u062f\u0627\u062e\u062a:<\/p>\n

\u06f1- \u062a\u0634\u062e\u06cc\u0635 \u0641\u0627\u0632\u06cc phase detection<\/strong><\/p>\n

\u062f\u0631 \u062a\u0634\u062e\u06cc\u0635 \u0641\u0627\u0632\u06cc PD \u0646\u0648\u0631 \u062f\u0631\u06cc\u0627\u0641\u062a\u06cc \u0628\u0647 \u062f\u0648 \u062a\u0635\u0648\u06cc\u0631 \u0645\u062c\u0632\u0627 \u062a\u0628\u062f\u06cc\u0644 \u0645\u06cc\u200c\u0634\u0648\u062f \u0648 \u062a\u0648\u0633\u0637 \u0633\u0646\u0633\u0648\u0631 \u062f\u0631\u06cc\u0627\u0641\u062a \u0645\u06cc\u200c\u0634\u0648\u062f. \u0627\u06cc\u0646 \u0631\u0648\u0634 \u0627\u063a\u0644\u0628 \u062f\u0631 \u062f\u0648\u0631\u0628\u06cc\u0646\u200c\u0647\u0627\u06cc \u062f\u06cc\u062c\u06cc\u062a\u0627\u0644 \u0648 \u0622\u0646\u0627\u0644\u0648\u06af SLR \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f. \u0633\u06cc\u0633\u062a\u0645 \u0627\u062a\u0648\u0641\u0648\u06a9\u0648\u0633 PD \u0628\u0631\u0627\u06cc \u062c\u062f\u0627 \u06a9\u0631\u062f\u0646 \u067e\u0631\u062a\u0648\u200c\u0647\u0627\u06cc \u0646\u0648\u0631 \u0648 \u062a\u0628\u062f\u06cc\u0644 \u0622\u0646 \u0628\u0647 \u062f\u0648 \u062a\u0635\u0648\u06cc\u0631 \u0645\u062c\u0632\u0627 \u0627\u0632 \u0645\u062c\u0645\u0648\u0639\u0647 \u0627\u0644\u0645\u0627\u0646\u200c\u0647\u0627\u06cc \u0646\u0648\u0631\u06cc \u0628\u0647 \u0646\u0627\u0645 Beam Spliter \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u062f\u0648 \u0645\u06cc\u06a9\u0631\u0648 \u0644\u0646\u0632 \u06a9\u0648\u0686\u06a9 \u0628\u0631\u0627\u06cc \u0647\u062f\u0627\u06cc\u062a \u067e\u0631\u062a\u0648\u0647\u0627\u06cc \u062f\u0631\u06cc\u0627\u0641\u062a\u06cc \u0627\u0632 \u0633\u0648\u0698\u0647 \u062f\u0631 \u0648\u0631\u0648\u062f\u06cc \u0644\u0646\u0632 \u0642\u0631\u0627\u0631 \u0645\u06cc\u200c\u06af\u06cc\u0631\u0646\u062f \u062f\u0631 \u0627\u062f\u0627\u0645\u0647 \u0644\u0646\u0632 \u0628\u0647 \u06af\u0648\u0646\u0647\u200c\u0627\u06cc \u062a\u0646\u0638\u06cc\u0645 \u0645\u06cc\u200c\u0634\u0648\u062f \u062a\u0627 \u062f\u0648 \u062a\u0635\u0648\u06cc\u0631 \u0628\u0647 \u0635\u0648\u0631 \u06a9\u0627\u0645\u0644 \u0628\u0631 \u0631\u0648\u06cc \u0647\u0645 \u0645\u0646\u0637\u0628\u0642 \u0634\u0648\u0646\u062f. \u0627\u06a9\u062b\u0631 \u0633\u0646\u0633\u0648\u0631\u200c\u0647\u0627\u06cc \u0633\u06cc\u0633\u062a\u0645 \u0627\u062a\u0648\u0641\u0648\u06a9\u0648\u0633 PD \u06cc\u06a9 \u0628\u0639\u062f\u06cc \u0647\u0633\u062a\u0646\u062f \u0648 \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u062f\u0631 \u0628\u0639\u0636\u06cc \u0627\u0632 \u062a\u0635\u0648\u06cc\u0631 \u0645\u062b\u0644\u0627\u064b \u0647\u0646\u06af\u0627\u0645 \u0641\u0648\u06a9\u0648\u0633 \u0628\u0631 \u0631\u0648\u06cc \u062e\u0637 \u0627\u0641\u0642 \u062f\u0686\u0627\u0631 \u0627\u0634\u06a9\u0627\u0644 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f. \u0628\u0631\u0627\u06cc \u062d\u0644 \u0627\u06cc\u0646 \u0645\u0634\u06a9\u0644 \u062f\u0631 \u062f\u0648\u0631\u0628\u06cc\u0646\u200c\u0647\u0627\u06cc \u062c\u062f\u06cc\u062f\u062a\u0631 DSLR \u0627\u0632 \u0646\u0642\u0627\u0637 \u0641\u0648\u06a9\u0648\u0633 \u06a9\u0631\u0627\u0633 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u062f\u0647 \u062a\u0627 \u0633\u06cc\u0633\u062a\u0645 \u0641\u0648\u06a9\u0648\u0633 \u062f\u0631 \u0634\u0631\u0627\u06cc\u0637 \u0645\u062e\u062a\u0644\u0641 \u0639\u0645\u0644\u06a9\u0631\u062f\u06cc \u0645\u0637\u0644\u0648\u0628 \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u062f\u0647\u062f.<\/p>\n

\"autofocus_phase_detection-svg\"<\/p>\n

\"\u062f\u0648\u0631\u0628\u06cc\u0646
\u062f\u0648\u0631\u0628\u06cc\u0646 D4 \u0646\u06cc\u06a9\u0648\u0646 \u06a9\u0647 \u0628\u0647 \u0633\u06cc\u0633\u062a\u0645 \u0627\u062a\u0648\u0641\u0648\u06a9\u0648\u0633 TTL \u062a\u0634\u062e\u06cc\u0635 \u0641\u0627\u0632\u06cc \u0645\u062c\u0647\u0632 \u0627\u0633\u062a<\/strong><\/figcaption><\/figure>\n

\u06f2- \u062a\u0634\u062e\u06cc\u0635 \u06a9\u0646\u062a\u0631\u0627\u0633\u062a Contrast detection<\/strong><\/p>\n

\u062f\u0631 \u0627\u06cc\u0646 \u0631\u0648\u0634 \u062f\u0648\u0631\u0628\u06cc\u0646 \u0628\u0631 \u0627\u0633\u0627\u0633 \u06a9\u0646\u062a\u0631\u0627\u0633\u062a \u062a\u0635\u0648\u06cc\u0631 \u062b\u0628\u062a \u0634\u062f\u0647 \u062a\u0648\u0633\u0637 \u0633\u0646\u0633\u0648\u0631 \u0627\u0635\u0644\u06cc\u060c \u0628\u0631 \u0631\u0648\u06cc \u0633\u0648\u0698\u0647 \u0641\u0648\u06a9\u0648\u0633 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0628\u0647 \u06af\u0648\u0646\u0647\u200c\u0627\u06cc \u06a9\u0647 \u0645\u0648\u062a\u0648\u0631 \u0641\u0648\u06a9\u0648\u0633 \u0628\u0647 \u0635\u0648\u0631\u062a \u0645\u062f\u0627\u0648\u0645 \u0644\u0646\u0632 \u0627\u0644\u0645\u0627\u0646\u200c\u0647\u0627\u06cc \u0644\u0646\u0632 \u0631\u0627 \u062c\u0627\u0628\u0647\u200c\u062c\u0627 \u0645\u06cc\u200c\u06a9\u0646\u062f \u062a\u0627 \u0628\u0647 \u0628\u06cc\u0634\u062a\u0631\u06cc\u0646 \u06a9\u0646\u062a\u0631\u0627\u0633\u062a \u062f\u0631 \u0644\u0628\u0647\u200c\u0627\u06cc \u062a\u0635\u0648\u06cc\u0631 \u0628\u0631\u0633\u062f. \u062f\u0631 \u0631\u0648\u0634 CD \u062f\u0648\u0631\u0628\u06cc\u0646 \u0628\u0647 \u0647\u06cc\u0686 \u0648\u062c\u0647 \u0641\u0627\u0635\u0644\u0647 \u0627\u0632 \u0633\u0648\u0698\u0647 \u0645\u062d\u0627\u0633\u0628\u0647 \u0646\u0645\u06cc\u200c\u0634\u0648\u062f \u0648 \u0628\u062f\u0648\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0647\u06cc\u0686 \u0633\u0646\u0633\u0648\u0631 \u06a9\u0645\u06a9\u06cc \u062f\u06cc\u06af\u0631\u060c \u0641\u0648\u06a9\u0648\u0633 \u0628\u0631 \u0631\u0648\u06cc \u0633\u0648\u0698\u0647 \u0635\u0648\u0631\u062a \u0645\u06cc\u200c\u06af\u06cc\u0631\u062f. \u0627\u06cc\u0646 \u0631\u0648\u0634 \u062f\u0631 \u0627\u063a\u0644\u0628 \u062f\u0648\u0631\u0628\u06cc\u0646\u200c\u0647\u0627\u06cc \u0628\u062f\u0648\u0646 \u0622\u06cc\u0646\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f. \u0644\u0627\u0632\u0645 \u0628\u0647 \u0630\u06a9\u0631 \u0627\u0633\u062a \u06a9\u0647 \u062f\u0648\u0631\u0628\u06cc\u0646\u200c\u0647\u0627\u06cc \u0627\u0645\u0631\u0648\u0632\u06cc \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0627\u0632 \u0627\u06cc\u0646 \u062f\u0648 \u0631\u0648\u0634 PD \u0648 CD \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u06a9\u0645\u0644 \u06cc\u06a9\u062f\u06cc\u06af\u0631 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f.<\/p>\n","protected":false},"excerpt":{"rendered":"

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\u0631\u0648\u0646\u0645\u0627\u06cc\u06cc \u06a9\u0631\u062f \u06a9\u0647 correfot \u0646\u0627\u0645 \u062f\u0627\u0634\u062a. \u0648\u0644\u06cc \u0627\u0648\u0644\u06cc\u0646 \u062f\u0648\u0631\u0628\u06cc\u0646 \u0641\u0648\u06a9\u0648\u0633 \u062e\u0648\u062f\u06a9\u0627\u0631 \u06a9\u0647 \u0628\u0647 \u0635\u0648\u0631\u062a \u0627\u0646\u0628\u0648\u0647 \u062a\u0648\u0644\u06cc\u062f \u0634\u062f \u06cc\u06a9 \u062f\u0648\u0631\u0628\u06cc\u0646 \u067e\u0648\u06cc\u0646\u062a \u0627\u0646\u062f \u0634\u0648\u062a […]<\/p>\n","protected":false},"author":18,"featured_media":11697,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[419,3975],"tags":[],"class_list":["post-11673","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","category-3975"],"yoast_head":"\n\u0628\u0631\u0631\u0633\u06cc \u0641\u0648\u06a9\u0648\u0633 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