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특허 상세정보

Focus detection system employing multiple area light distribution sensors

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01J-001/20   
미국특허분류(USC) 250/2018 ; 250/204
출원번호 US-0294920 (1989-01-09)
우선권정보 JP-0140196 (1984-07-06); JP-0143722 (1984-07-11)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 13  인용 특허 : 9
초록

A focus detection system for detecting a focus state of an object lens, includes an optical device for forming first and second light distributions corresponding to first and second images having light fluxes passing through the different parts of a pupila of the object lens. The positional relationship between the two light distributions varies in accordance with the focus state of the object lens. First and second sensors sense the first and second light distributions. A signal processor for processing output signals from the first and second sensors d...

대표
청구항

A focus detection system for detecting a focus state of an object lens, comprising: optical means for forming first and second light distributions respectively corresponding to first and second images having light reflective fluxes passing through the different parts of the object lens, whereby the positional relationship between said first and second light distributions varies in accordance with the focus state of the object lens; first and second sensing means for sensing said first and second light distributions, said first and second sensing means ea...

이 특허를 인용한 특허 피인용횟수: 13

  1. Suda Yasuo,JPX. Camera capable of display in finder. USP2000046047139.
  2. Suda Yasuo,JPX. Camera, exchangeable lens, and camera system. USP2000086112029.
  3. Ikemoto, Kiyokatsu. Distance measuring apparatus. USP2017129841580.
  4. Suda, Yasuo. Focus detecting device with photoelectric conversion portion having microlens and with light blocking portion having first and second openings. USP2005086933978.
  5. Takamiya, Makoto. Focus detection apparatus, focus detection method, and image sensing apparatus. USP2012048159599.
  6. Inoue, Daisuke; Takahashi, Hidekazu. Focus detection apparatus, method of driving the same and camera system. USP2010017643743.
  7. Inoue, Daisuke; Takahashi, Hidekazu. Focus detection apparatus, method of driving the same and camera system. USP201309RE44499.
  8. Aoki, Takashi. Image capturing apparatus and in-focus position detection method thereof. USP2016059357120.
  9. Aoki, Takashi. Image capturing apparatus and in-focus position detection method thereof. USP2014078780259.
  10. Suda, Yasuo. Image taking apparatus and lens apparatus. USP2010127847853.
  11. Suda,Yasuo. Image taking apparatus and lens apparatus. USP2008087414664.
  12. Knippelmeyer, Rainer; Kienzle, Oliver; Kemen, Thomas; Mueller, Heiko; Uhlemann, Stephan; Haider, Maximilian; Casares, Antonio; Rogers, Steven. Particle-optical systems and arrangements and particle-optical components for such systems and arrangements. USP2017069673024.
  13. Noto,Goro; Suda,Yasuo; Nagano,Akihiko. Solid-state image sensing element and its design support method, and image sensing device. USP2006107119319.