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특허 상세정보

Focus detecting and/or focus adjustment method

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G03B-003/00   
미국특허분류(USC) 354/402 ; 354/407 ; 354/408 ; 364/525
출원번호 US-0769795 (1985-08-26)
우선권정보 JP-0127206 (1979-10-01)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 5  인용 특허 : 13
초록

Disclosed is a method of detecting the focusing condition of an image forming optical system to an object, in which two images of the object are formed with respective light beams from the prescribed exit pupil areas lying in almost symmetry to each other with respect to the optical axis of the optical system and are sensed to obtain an equal number of picture element data for each of the images, and based on the thus-obtained picture element data, while sequential shifting for the first image is carried out from its one end to its opposite end, and a se...

대표
청구항

An automatic focus detection device for a single lens reflex camera which can have various taking lenses with adjustable focus points mounted thereon, comprising: (A) control means; (B) light receiving means controlled by said control means for forming first and second data concerning respective first and second detection images of an object, said first and second detection images being obtained through a pair of portions of a mounted taking lens almost symmetrical with respect to the optical axis and having associated image portions relative to said obj...

이 특허에 인용된 특허 (13)

  1. Joseph James D. (Oakdale MN) Wilwerding Dennis J. (Littleton CO). Apparatus for range finding equipment. USP1981024250376.
  2. Stein Karl-Ulrich (Munich DEX). Arrangement for measuring the range or speed of an object. USP1981094290693.
  3. Araki Kunihiko (Tokyo JPX). Automatic focusing position detection apparatus. USP1983064387975.
  4. Kawabata Takashi (Kamakura JPX) Tsunekawa Tokuichi (Yokohama JPX) Hosoe Kazuya (Machida JPX) Kinoshita Takao (Tokyo JPX) Sakai Shinji (Tokyo JPX) Taguchi Tatsuya (Tokyo JPX). Focus detecting device. USP1982084346970.
  5. Tokutomi, Seijiro; Jyojiki, Masao; Nakamura, Kazuo. Focus detecting device in single lens reflex camera. USP1981054265520.
  6. Sakai Shinji (Tokyo JPX) Shinoda Nobuhiko (Tokyo JPX) Kinoshita Takao (Tokyo JPX) Kawabata Takashi (Kamakura JPX) Kitagishi Nozomu (Kawasaki JPX) Hosoe Kazuya (Machida JPX) Ito Tadashi (Yokohama JPX). Focus detecting system. USP1982074341953.
  7. Suzuki Takeomi (Tokyo JPX) Aoki Masahiro (Fussa JPX). Focus detection by accumulation of a given number of the largest absolute difference magnitudes between adjacent photoce. USP1982024314151.
  8. Tsunekawa Tokuichi (Yokohama JPX) Masunaga Makoto (Tokyo JPX) Hosoe Kazuya (Machida JPX) Niwa Yukichi (Yokohama JPX) Owada Mitsutoshi (Yokohama JPX) Asano Noriyuki (Kawasaki JPX). Image scanning system. USP1981084283137.
  9. Stein Karl U. (Munich DEX). Method for the automatic or semiautomatic distance measurement and focusing of the image of an object onto a focal plane. USP1982034320302.
  10. Stein Karl-Ulrich (Munich DEX). Method for the automatic or semiautomatic distance measurement and focusing of the image of an object onto a focal plane. USP1983114412741.
  11. Asano Noriyuki (Kawasaki JPX) Niwa Yukichi (Yokohama JPX) Owada Mitsutoshi (Yokohama JPX) Yamagata Takaaki (Yokohama JPX) Tsuda Shin (Kawagoe JPX). Range detecting method and apparatus. USP1980024189232.
  12. Stauffer Norman L. (Englewood CO). Range determination system. USP1980014185191.
  13. Masunaga Makoto (Tokyo JPX) Hosoe Kazuya (Machida JPX) Tsunekawa Tokuichi (Yokohama JPX) Tamura Shuichi (Yokohama JPX) Yokota Hideo (Tokyo JPX). Range finding device. USP1979014135815.