JPS54155036A - Automatic focusing device for camera - Google Patents

Automatic focusing device for camera

Info

Publication number
JPS54155036A
JPS54155036A JP6292678A JP6292678A JPS54155036A JP S54155036 A JPS54155036 A JP S54155036A JP 6292678 A JP6292678 A JP 6292678A JP 6292678 A JP6292678 A JP 6292678A JP S54155036 A JPS54155036 A JP S54155036A
Authority
JP
Japan
Prior art keywords
focusing
photo
lens
mirror
image
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.)
Pending
Application number
JP6292678A
Other languages
Japanese (ja)
Inventor
Masatoshi Kimura
Akihiko Hashimoto
Atsushi Kidawara
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP6292678A priority Critical patent/JPS54155036A/en
Priority to DE19792921318 priority patent/DE2921318A1/en
Priority to DE19797915212U priority patent/DE7915212U1/en
Publication of JPS54155036A publication Critical patent/JPS54155036A/en
Priority to US06/282,875 priority patent/US4389566A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

PURPOSE: To obtain a simple and small automatic focusing device for a camera by focusing a photo-image at a single focusing element via first and second focusing optical systems using a half mirror.
CONSTITUTION: Two photo-images are focused through first optical system for focusing the one photo-image passing through a half mirror 2 at a focusing element 5 through a focusing lens 8 and through second optical system for focusing the other photo-image passing through a reflecting mirror 9 and a mirror 2 at the focusing element 5 through the lens 8. The mirror 9 is so rotated as to equalize the contrasts of these two photo-images at the focusing element 5 to thereby control the movement of a photographing lens in response to the movement of the lens 9 to thus automatically focus the photo-image using a single focusing element. Accordingly, it can obtain a simple and small automatic focusing device in high accuracy without affection of characteristic difference of plural elements.
COPYRIGHT: (C)1979,JPO&Japio
JP6292678A 1978-05-26 1978-05-26 Automatic focusing device for camera Pending JPS54155036A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6292678A JPS54155036A (en) 1978-05-26 1978-05-26 Automatic focusing device for camera
DE19792921318 DE2921318A1 (en) 1978-05-26 1979-05-25 AUTOMATIC FOCUSING DEVICE FOR PHOTO APPARATUS
DE19797915212U DE7915212U1 (en) 1978-05-26 1979-05-25 AUTOMATIC FOCUSING DEVICE FOR PHOTO APPARATUS
US06/282,875 US4389566A (en) 1978-05-26 1981-07-13 Automatic focusing apparatus for cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6292678A JPS54155036A (en) 1978-05-26 1978-05-26 Automatic focusing device for camera

Publications (1)

Publication Number Publication Date
JPS54155036A true JPS54155036A (en) 1979-12-06

Family

ID=13214361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6292678A Pending JPS54155036A (en) 1978-05-26 1978-05-26 Automatic focusing device for camera

Country Status (1)

Country Link
JP (1) JPS54155036A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54135528A (en) * 1978-04-12 1979-10-20 Seiko Koki Kk Focus detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54135528A (en) * 1978-04-12 1979-10-20 Seiko Koki Kk Focus detector

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