JPS54155037A - Automatic focusing device for camera - Google Patents
Automatic focusing device for cameraInfo
- 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
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
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)
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 |
-
1978
- 1978-05-26 JP JP6292778A patent/JPS54155037A/en active Pending
Patent Citations (2)
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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