JPS54155037A - Automatic focusing device for camera - Google Patents

Automatic focusing device for camera

Info

Publication number
JPS54155037A
JPS54155037A JP6292778A JP6292778A JPS54155037A JP S54155037 A JPS54155037 A JP S54155037A JP 6292778 A JP6292778 A JP 6292778A JP 6292778 A JP6292778 A JP 6292778A JP S54155037 A JPS54155037 A JP S54155037A
Authority
JP
Japan
Prior art keywords
focusing
photo
optical system
image
mirror
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
JP6292778A
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 JP6292778A priority Critical patent/JPS54155037A/en
Priority to DE19792921318 priority patent/DE2921318A1/en
Priority to DE19797915212U priority patent/DE7915212U1/en
Publication of JPS54155037A publication Critical patent/JPS54155037A/en
Priority to US06/282,875 priority patent/US4389566A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To provide a simple and small automatic focusing device which can accurately detect the focusing and confirm the distance measuring range for a camera by focusing part of a photo-image in a view finder optical system at a single focusing element for focusing the photo-image through a half mirror and first optical system.
CONSTITUTION: A distance measuring range is confirmed by visually confirming a photo-image focused via an eyepiece 8 through the half mirror 4 of a view finder optical system. The photo-image reflected on the half mirror 4 and then reflected on the hlaf mirror 2 of first optical system is focused at a single focusing element 6 for focusing the photo-image through the first optical system to generate a contrast detection signal or the like therefrom due to the superimposition of both the photo- images to thereby focus via the movement of an objective lens interlocking with the rotation of the mirror 4 by the signal. This automatic focusing device can dedetect highly accurate focusing with a configuration without a plurality of focusing elements of this different characteristics.
COPYRIGHT: (C)1979,JPO&Japio
JP6292778A 1978-05-26 1978-05-26 Automatic focusing device for camera Pending JPS54155037A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6292778A JPS54155037A (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
JP6292778A JPS54155037A (en) 1978-05-26 1978-05-26 Automatic focusing device for camera

Publications (1)

Publication Number Publication Date
JPS54155037A true JPS54155037A (en) 1979-12-06

Family

ID=13214392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6292778A Pending JPS54155037A (en) 1978-05-26 1978-05-26 Automatic focusing device for camera

Country Status (1)

Country Link
JP (1) JPS54155037A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990529A (en) * 1972-12-27 1974-08-29
JPS54135528A (en) * 1978-04-12 1979-10-20 Seiko Koki Kk Focus detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990529A (en) * 1972-12-27 1974-08-29
JPS54135528A (en) * 1978-04-12 1979-10-20 Seiko Koki Kk Focus detector

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