[특허]Automatic focusing apparatus

Automatic focusing apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G03B-003/00 G03B-013/18
출원번호	US-0485646 (1990-02-27)
우선권정보	JP-0051423 (1989-03-03); JP-0319473 (1989-12-08); JP-0320625 (1989-12-12)
발명자 / 주소	Nagasaki Tatsuo (Yokohama JPX) Komiya Yasuhiro (Hachioji JPX)
출원인 / 주소	Olympus Optical Co., Ltd. (Tokyo JPX 03)
인용정보	피인용 횟수 : 35 인용 특허 : 0

초록 ▼

An automatic focusing apparatus of this invention includes a photographing optical system for forming an optical image of an object, an image pickup element for converting the optical image formed by the photographing optical system into an electrical signal, a drive circuit for changing a relative position between the photographing optical system and the image pickup element, a reading circuit for reading the electrical signals at different relative positions as image signals from the image pickup element, a frequency extracting circuit for extracting frequency components of the same specific bands from the image signals read by the reading circuit (34), a focusing signal generator for adding the plurality of frequency components extracted by the frequency extracting circuit to generate a focusing signal, a filtering circuit for filtering the focusing signal to generate a filtering signal, and a microprocessor for performing an in-focus detection operation using a plurality of signal values of the filtering signal, calculating a defocus amount, and outputting a control signal to the drive circuit.

대표청구항 ▼

An automatic focusing apparatus comprising: a photographing optical system for forming an optical image of an object; an image pickup element for converting the optical image formed by said photographing optical system into an electrical signal; driving means for changing a relative position between said photographing optical system and said image pickup element; means for reading the electrical signals obtained at different relative positions as image signals while the relative position is changed by said driving means; frequency extracting means for extracting frequency components of the same specific frequency bands from the image signals sequentially read by said reading means; means for converting the frequency components extracted by said frequency extracting means to a signal having positive values; focusing signal generating means for adding the positive values to generate a focusing signal having values; and in-focus position operating means for selecting a predetermined signal value from the plurality of signal values of the focusing signal, for calculating the in-focus position by using the selected signal value, for calculating a defocus amount from the in-focus position, and for outputting a drive signal corresponding to the defocus amount to said driving means.

이 특허를 인용한 특허 (35)

Haruki Toshinobu (Shijonawate JPX) Kikuchi Kenichi (Daito JPX), Automatic focusing apparatus for automatically adjusting focus in response to video signal by fuzzy inference.
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Yamada Shin-ichi (Katano JPX) Yamamoto Takeharu (Takatsuki JPX) Edahiro Yasuaki (Habikino JPX) Moriya Mitsurou (Ikoma JPX), Control devices for optical disk based on driving signal saturation.
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O'Hagan Timothy P. ; Wang Ynjiun P. ; Wall Daniel G., Dataform reader including dual laser and imaging reading assemblies.
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Tausch Mark ; Wang Ynjiun P. ; O'Hagan Timothy P., Extended working range dataform reader.
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Chu John B. (Fort Myers FL) Ju Paul P. (Fort Myers FL) Wang Ynjiun P. (Fort Myers FL), Extended working range dataform reader including fuzzy logic image control circuitry.
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Ju Paul P. ; Wang Ynjiun P., Extended working range dataform reader with reduced power consumption.
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Yujiro Ito JP, Focus control apparatus and method for use with a video camera or the like.
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Uchiyama Shigeyuki (Tokyo JPX), Focus state detection device and method.
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Manaresi Nicolo,ITX ; Franchi Eleonora,ITX ; Bruno Dario,ITX ; Poluzzi Rinaldo,ITX, Fuzzy analog processor with temperature compensation.
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Yoshimura, Yuki; Fukuda, Koichi, Image capturing apparatus and focus detection method.
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Taubman,David S., Image demosaicing and enhancement system.
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Suda,Yasuo, Image sensing apparatus having image signals generated from light between optical elements of an optical element array.
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Yamazaki Tatsuya,JPX ; Ohkawara Hiroto,JPX, Image shake correcting device.
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Yamazaki Tatsuya,JPX ; Ohkawara Hiroto,JPX, Image-shake correcting device.
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Okawara, Hiroto, Imaging apparatus.
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Onozawa, Masaru, Imaging apparatus having a focus function.
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Park, Kyong-Tae; Lee, Jeong-Won; Moon, Kyoung-Hwan, Imaging apparatus performing auto focusing function with plurality of band pass filters and auto focusing method applied to the same.
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Li, Jingqiang; Lee, Young; Lee, Dennis C., Method and device for damping lens vibration.
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Muench, Lothar, Method to determine auto focus of a digital camera.
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Sugimoto, Masahiko, Photographing apparatus and in-focus position searching method.
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Kajiyama,Takashi, Photographing apparatus with automatic focus.
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Fukuda Hiroyuki,JPX, Photometric device and method for a camera.
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Iwasaki Hiroyuki (Kanagawa-ken JPX), Photometry device and method.
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Feng Chen ; Wang Ynjiun P., Portable data collection device with LED targeting and illumination assembly.
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Feng Chen, Portable data collection device with crosshair targeting illumination assembly.
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Meyerson Robert F. ; Wang Ynjiun P., Portable data collection device with two dimensional imaging assembly.
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Chen Feng, Portable data collection device with variable focusing module for optic assembly.
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Feng Chen, Portable data collection device with variable focusing module for optic assembly.
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Feng Chen ; Wang Ynjiun P., Portable data collection device with viewing assembly.
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Feng Chen ; Wang Ynjiun P., Portable data collection device with viewing assembly.
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Timothy P. O'Hagan ; Ynjium P. Wang, Portable data collection network with telephone and voice mail capability.
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Li, Jingqiang; Hung, Szepo Robert; Noyes, Ying Xie; Chiu, Chinchuan Andrew, Predictive focus value calculation for image capture devices.
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Manaresi Nicolo,ITX ; Franchi Eleonora,ITX ; Bruno Dario,ITX ; Poluzzi Rinaldo,ITX, Programmable fuzzy analog processor.
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Li, Jingqiang; Lee, Young; Lee, Dennis C., System for reducing lens vibration.
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Norita,Toshio; Sato,Kazuchika; Okada,Hiroyuki; Miyazaki,Makoto; Kamon,Koichi, Three-dimensional input apparatus and image sensing control method.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Automatic focusing apparatus 원문보기

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Automatic focusing apparatus 원문보기

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이 특허를 인용한 특허 (35)

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