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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||354/406 ; 250/204 ; 352/140 ; 358/227|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 23 인용 특허 : 0|
An automatic focus detecting device comprising an image sensor for electrically converting distributions of two images of an object which are formed by two restricted light beams passed through different areas in a zooming lens system into time sequence video signals which in turn are extracted at predetermined extraction intervals and directed to a correlator for deciding the degree of agreement between the two images. The video signal extraction is effected in two operation modes; one is for a high accuracy focus detection and the other for a rough acc...
An automatic focus detecting device which is used with a camera having a taking lens comprising a focusing lens system, a zooming lens system and a master lens system for detecting the defocusing amount of said focusing lens system from the amount of shift occurring between two images of an object, said two images being formed by light beams passing through two different areas in said zooming lens system and moving in opposite directions as said focusing lens system moves along its optical axis, said device comprising: an image sensor for converting the ...