JPH0449088B2 - - Google Patents

Info

Publication number
JPH0449088B2
JPH0449088B2 JP57081965A JP8196582A JPH0449088B2 JP H0449088 B2 JPH0449088 B2 JP H0449088B2 JP 57081965 A JP57081965 A JP 57081965A JP 8196582 A JP8196582 A JP 8196582A JP H0449088 B2 JPH0449088 B2 JP H0449088B2
Authority
JP
Japan
Prior art keywords
data
distance
distance measurement
lens
ultrasonic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP57081965A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58198009A (ja
Inventor
Katsuji Ishikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
West Electric Co Ltd
Original Assignee
West Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by West Electric Co Ltd filed Critical West Electric Co Ltd
Priority to JP57081965A priority Critical patent/JPS58198009A/ja
Priority to US06/494,026 priority patent/US4487494A/en
Publication of JPS58198009A publication Critical patent/JPS58198009A/ja
Publication of JPH0449088B2 publication Critical patent/JPH0449088B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/40—Systems for automatic generation of focusing signals using time delay of the reflected waves, e.g. of ultrasonic waves

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
JP57081965A 1982-05-14 1982-05-14 超音波オ−トフオ−カス装置 Granted JPS58198009A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP57081965A JPS58198009A (ja) 1982-05-14 1982-05-14 超音波オ−トフオ−カス装置
US06/494,026 US4487494A (en) 1982-05-14 1983-05-12 Automatic focusing apparatus using ultrasonic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57081965A JPS58198009A (ja) 1982-05-14 1982-05-14 超音波オ−トフオ−カス装置

Publications (2)

Publication Number Publication Date
JPS58198009A JPS58198009A (ja) 1983-11-17
JPH0449088B2 true JPH0449088B2 (US06633600-20031014-M00021.png) 1992-08-10

Family

ID=13761211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57081965A Granted JPS58198009A (ja) 1982-05-14 1982-05-14 超音波オ−トフオ−カス装置

Country Status (2)

Country Link
US (1) US4487494A (US06633600-20031014-M00021.png)
JP (1) JPS58198009A (US06633600-20031014-M00021.png)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH063519B2 (ja) * 1984-04-06 1994-01-12 ミノルタカメラ株式会社 データ読み取り装置
US4547055A (en) * 1984-12-26 1985-10-15 Polaroid Corporation Method and apparatus for optimizing object distance signals
JPH087322B2 (ja) * 1986-03-10 1996-01-29 キヤノン株式会社 自動合焦装置
CN101770139B (zh) * 2008-12-29 2012-08-29 鸿富锦精密工业（深圳）有限公司 对焦控制系统及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158226A (en) * 1978-04-25 1979-12-13 Polaroid Corp Method of automatically positioning lens and camera executing same
JPS5678811A (en) * 1979-12-03 1981-06-29 Ricoh Co Ltd Automatic focus controlling device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309098A (en) * 1978-12-01 1982-01-05 Polaroid Corporation Autofocus cine camera having automatic variable speed focusing
US4336987A (en) * 1980-12-22 1982-06-29 Polaroid Corporation Camera employing zone focusing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158226A (en) * 1978-04-25 1979-12-13 Polaroid Corp Method of automatically positioning lens and camera executing same
JPS5678811A (en) * 1979-12-03 1981-06-29 Ricoh Co Ltd Automatic focus controlling device

Also Published As

Publication number Publication date
JPS58198009A (ja) 1983-11-17
US4487494A (en) 1984-12-11

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