JPS55130522A - Single-lens reflex camera provided with ttl type focus detector - Google Patents
Single-lens reflex camera provided with ttl type focus detectorInfo
- Publication number
- JPS55130522A JPS55130522A JP3868979A JP3868979A JPS55130522A JP S55130522 A JPS55130522 A JP S55130522A JP 3868979 A JP3868979 A JP 3868979A JP 3868979 A JP3868979 A JP 3868979A JP S55130522 A JPS55130522 A JP S55130522A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- photoelectric
- lens
- photoelectric transducers
- 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
Abstract
PURPOSE: To improve the accuracy of focus detection by using a ring-form lens and specifying the disposition of photoelectric transducers.
CONSTITUTION: A ring-form lens 9 whose central part 9a is optically shielded and a photoelectric detection plate 10 disposed with a plurality of photoelectric transducers 10a, 10b groups intermittently and at an equal spacing within the ring form range are disposed within the reflected light path of the photo splitting mirror 8 provided to the inside center of a condenser lens 7. As a result of this, part of the subject light imaging on a finder screen 3a by way of an interchangeable type photographing lens 1 and mirror 3 is split to a plurality of partial oblique luminous fluxes through the photo splitting mirror 8 and ring-form transmission part 9b and these luminous fluxes enter photoelectric transducers 10a, 10b. By subsequently or simultaneously measuring the photoelectric transducer 10a, 10b groups, the output difference between the respective elements or the maximum value and minimum value differences of the element group outputs are detected, whereby the focus detection is accomplished with high accuracy.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3868979A JPS55130522A (en) | 1979-03-31 | 1979-03-31 | Single-lens reflex camera provided with ttl type focus detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3868979A JPS55130522A (en) | 1979-03-31 | 1979-03-31 | Single-lens reflex camera provided with ttl type focus detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55130522A true JPS55130522A (en) | 1980-10-09 |
Family
ID=12532256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3868979A Pending JPS55130522A (en) | 1979-03-31 | 1979-03-31 | Single-lens reflex camera provided with ttl type focus detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55130522A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS596634A (en) * | 1982-07-02 | 1984-01-13 | Nec Corp | Voice switch circuit |
-
1979
- 1979-03-31 JP JP3868979A patent/JPS55130522A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS596634A (en) * | 1982-07-02 | 1984-01-13 | Nec Corp | Voice switch circuit |
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