JPS55108632A - Focus position detector - Google Patents
Focus position detectorInfo
- Publication number
- JPS55108632A JPS55108632A JP1562979A JP1562979A JPS55108632A JP S55108632 A JPS55108632 A JP S55108632A JP 1562979 A JP1562979 A JP 1562979A JP 1562979 A JP1562979 A JP 1562979A JP S55108632 A JPS55108632 A JP S55108632A
- Authority
- JP
- Japan
- Prior art keywords
- automatic focusing
- lens
- focusing lens
- circuit
- lens frame
- 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 achieve simpler and smaller construction by eccentrically rotating an automatic focusing lens by way of a lens frame and detecting its focusing point.
CONSTITUTION: A lens frame 1 is provided rotatable about the central axis l and movably in the arrow direction along the central axis l, to the camera body 2. An automatic focusing lens 3 is eccentricaly mounted and held to this. The focus detection is performed while the lens frame 1, hence automatic focusing lens 3 are being revolved and moved by motors 4, 5. As a result of this, the revolution of the automatic focusing lens 3 makes the similar action as that a photo detector 6 is rotated, whereby the focus condition is detected and the output of the photo detector 6 changes and is sent to a peak value detecting circuit 12 via low-pass filter 8, amplifier 9, wave form rectifier circuit 10 and differentiating circuit 11. The focusing signal corresponding to the focus condition is thereby formed and the driving and stopping of motors 4, 5 is accomplished by a motor control circuit 13.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1562979A JPS55108632A (en) | 1979-02-14 | 1979-02-14 | Focus position detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1562979A JPS55108632A (en) | 1979-02-14 | 1979-02-14 | Focus position detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55108632A true JPS55108632A (en) | 1980-08-21 |
Family
ID=11894000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1562979A Pending JPS55108632A (en) | 1979-02-14 | 1979-02-14 | Focus position detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55108632A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS509304A (en) * | 1973-05-22 | 1975-01-30 | ||
JPS525849A (en) * | 1975-06-26 | 1977-01-17 | Unitech Chemical Inc | Heattsensitive carboxylated copolymer adhesive and its production method |
-
1979
- 1979-02-14 JP JP1562979A patent/JPS55108632A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS509304A (en) * | 1973-05-22 | 1975-01-30 | ||
JPS525849A (en) * | 1975-06-26 | 1977-01-17 | Unitech Chemical Inc | Heattsensitive carboxylated copolymer adhesive and its production method |
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