JPS5485026A - Automatic focus controller of cameras - Google Patents
Automatic focus controller of camerasInfo
- Publication number
- JPS5485026A JPS5485026A JP15320477A JP15320477A JPS5485026A JP S5485026 A JPS5485026 A JP S5485026A JP 15320477 A JP15320477 A JP 15320477A JP 15320477 A JP15320477 A JP 15320477A JP S5485026 A JPS5485026 A JP S5485026A
- Authority
- JP
- Japan
- Prior art keywords
- distance information
- circuit
- latch circuit
- focusing
- accomplished
- 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 the prevention of out-of-focusing and the miniaturization of the apparatus by occasionally reading out the distance information having been stored thereby controlling the position of a photographic lens.
CONSTITUTION: First, second latch circuits 33, 34 which store distance information are provided and are connected to a motor control circuit 39 via D-A conversion circuit 38. Then, when a cam mechanism 8 is driven by a motor 5, a turning mirror 4 turns, whereby subject scanning is accomplished. At the same time, a disc 22 rotates and its sliding contact pieces 27 make contact to comb tooth electrodes 24 subsequently. The pulses generated thereby are applied to a counter 31 via waveform shaping circuit 30 and are stored as the distance information from the specified position up to the subject in a first latch circuit 33. Next, the distance information of the first latch circuit 33 is written in a second latch circuit 34 via changeover switch 35 and is inputted to a motor control circuit 39, by which a photographic lens 40 is position-controlled and focusing is thereby accomplished. Thus, the utilization of a microcomputer is made possible and this coupled with the application of a triangular distance measuring mechanism miniaturize the apparatus.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15320477A JPS5485026A (en) | 1977-12-19 | 1977-12-19 | Automatic focus controller of cameras |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15320477A JPS5485026A (en) | 1977-12-19 | 1977-12-19 | Automatic focus controller of cameras |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5485026A true JPS5485026A (en) | 1979-07-06 |
Family
ID=15557310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15320477A Pending JPS5485026A (en) | 1977-12-19 | 1977-12-19 | Automatic focus controller of cameras |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5485026A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6059314A (en) * | 1983-09-12 | 1985-04-05 | Konishiroku Photo Ind Co Ltd | Position detector for focusing lens |
-
1977
- 1977-12-19 JP JP15320477A patent/JPS5485026A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6059314A (en) * | 1983-09-12 | 1985-04-05 | Konishiroku Photo Ind Co Ltd | Position detector for focusing lens |
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