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특허 상세정보

Focus condition detecting device for cameras

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G03B-003/00    G01J-001/36   
미국특허분류(USC) 354/406; 250/204
출원번호 US-0640771 (1984-08-14)
우선권정보 JP-0149959 (1983-08-16)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Price, Joseph W.
인용정보 피인용 횟수 : 12  인용 특허 : 2
초록

In a focus condition detecting device of the type in which a pair of re-imaging lenses together with a condenser lens form a pair of re-images of an object image on a line sensor such that the distance between the corresponding points of the re-images on the line-sensor varies with the focus condition of a camera objective lens forming the objective image, the line sensor is located in front of a plane conjugate with a predetermined focal plane of the camera objective lens with respect to the condenser lens and the re-imaging lenses, so that the distance...

대표
청구항

1. A focus condition detecting device for a camera having an objective lens which forms an object image, said device comprising: a pair of re-imaging optical systems arranged symmetrically with one another with respect to the optical axis of said objective lens for re-imaging said object image as first and second re-images; and a line sensor arranged optically in front of a plane conjugate with a predetermined focal plane of said objective lens with respect to said re-imaging optical systems and extending in the direction perpendicular to the optical...

이 특허를 인용한 특허 피인용횟수: 12

  1. Koyama Takeshi (Tokyo JPX) Ohtaka Keiji (Tokyo JPX). Apparatus for detecting the focus adjusted state of an objective optical system. USP1989064841326.
  2. Suda Yasuo (Yokohama JPX) Arakawa Kazuhiko (Kawasaki JPX) Ohtaka Keiji (Tokyo JPX) Koyama Takeshi (Tokyo JPX) Ohnuki Ichiro (Tokyo JPX). Camera having a focus detecting apparatus. USP1988094774539.
  3. Ohno Yoshimi (Kawasaki JPX) Hatase Takayuki (Fukuoka JPX). Device and method for detecting a focusing state with reliability checking. USP1990104960986.
  4. Suda Yasuo (Yokohama JPX) Arakawa Kazuhiko (Kawasaki JPX) Ohtaka Keiji (Tokyo JPX) Koyama Takeshi (Tokyo JPX) Ohnuki Ichiro (Tokyo JPX). Device for detecting the focus adjusted state of an objecting lens. USP1990094959677.
  5. Mogamiya Makoto,JPX. Electronic development type image pickup device. USP1998085790190.
  6. Shindo Osamu (Tokyo JPX). Focus detecting optical system. USP1989054829332.
  7. Sensui Takayuki,JPX. Focus detection optical system in a single lens reflex camera. USP1999085940635.
  8. Suda Yasuo (Yokohama JPX) Ohmura Hiroshi (Wako JPX) Ishizaki Akira (Yokohama JPX) Akashi Akira (Yokohama JPX) Ohtaka Keiji (Tokyo JPX). Focus state detecting system. USP1987084688920.
  9. Mogamiya Makoto (Tokyo JPX) Okabe Masato (Tokyo JPX) Kamiyama Hironori (Tokyo JPX) Shimizu Osamu (Tokyo JPX) Yamashita Yuudai (Tokyo JPX). Holder assembly for electro-developing recording media and electro-developing type camera with such holder assembly. USP1997105678101.
  10. Inagaki, Daisuke. Image processing apparatus, image processing method, and recording medium recording image processing program. USP2004106807288.
  11. Yokoyama Shotaro (Kanagawa JPX) Nishibe Takashi (Kanagawa JPX). Object-detecting system for optical instrument. USP1997025602944.
  12. Shindo Osamu (Tokyo JPX). Optical system for use in focus detecting apparatus. USP1987124716431.