JPS55130523A - Automatic focus system single-lens reflex camera - Google Patents
Automatic focus system single-lens reflex cameraInfo
- Publication number
- JPS55130523A JPS55130523A JP3889479A JP3889479A JPS55130523A JP S55130523 A JPS55130523 A JP S55130523A JP 3889479 A JP3889479 A JP 3889479A JP 3889479 A JP3889479 A JP 3889479A JP S55130523 A JPS55130523 A JP S55130523A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- film
- photo detector
- photo
- distance measuring
- 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
- 230000011514 reflex Effects 0.000 title 1
- 230000004907 flux Effects 0.000 abstract 2
- 230000003287 optical Effects 0.000 abstract 2
- 230000002452 interceptive Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
Abstract
PURPOSE: To surely secure the quantity of incident light to a finder and photo detector by obliquely providing a photo detecting mirror between focal plate and main mirror and disposing a distance measuring photo detector on its reflected light path.
CONSTITUTION: A photo detecting mirror 8 consisting of a semilight transmittable mirror or nonlight-transmittable mirror is obliquely provided to the position of not cutting off the incident luminous flux to a film 7 between the focal plate 4 and main mirror 5 of the finder optical system. A distance measuring photo detector 3 is disposed on the reflected light path by this photo detecting mirror 8. As a result of this, the main mirror 5 is disposed on the incident light path to the film 7 and the incident light from the photographing lens 1 is imaged on the matt surface of the focal plate 4. At the same time, part of said image is changed of optical path by the photo detecting mirror 8 and is imaged on the distance measuring photo detector 3, whereby the distance measurement is acomplished. On the other hand, the main mirror 5 is retreated to the position of not interfering the incident luminous flux to the film 7 and the image is formed on the film 7, whereby exposure is done.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3889479A JPS55130523A (en) | 1979-03-31 | 1979-03-31 | Automatic focus system single-lens reflex camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3889479A JPS55130523A (en) | 1979-03-31 | 1979-03-31 | Automatic focus system single-lens reflex camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55130523A true JPS55130523A (en) | 1980-10-09 |
Family
ID=12537902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3889479A Pending JPS55130523A (en) | 1979-03-31 | 1979-03-31 | Automatic focus system single-lens reflex camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55130523A (en) |
-
1979
- 1979-03-31 JP JP3889479A patent/JPS55130523A/en active Pending
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