JPS55142322A - Interchangeable lens mounting checker - Google Patents
Interchangeable lens mounting checkerInfo
- Publication number
- JPS55142322A JPS55142322A JP5045579A JP5045579A JPS55142322A JP S55142322 A JPS55142322 A JP S55142322A JP 5045579 A JP5045579 A JP 5045579A JP 5045579 A JP5045579 A JP 5045579A JP S55142322 A JPS55142322 A JP S55142322A
- Authority
- JP
- Japan
- Prior art keywords
- interchangeable lens
- output
- mount
- way
- circuit
- 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 make possible sure and rapid checking by checking the mounting of an interchangeable lens by way of the magnetic flux by the permanent magnet provided to the mount of the interchangeable lens.
CONSTITUTION: When the mount position mark of the interchangeable lens and the position mark of the camera are matched, the magnetic flux of the permanent magnet of the mount is detected by the Hall element 4 of the camera and the output of an amplifier 17 inverts to a high level, causing the output of a NOR circuit 10 to be also inverted to a high level by the output inversion of the NOR circuit 11 of a latch circuit by way of an AND circuit 18. This high-level output causes a transistor TR to conduct by way of an AND gate 12 thereby letting a light emitting diode D emit light. When the mounting of the lens is completed by turning the mount, the magnetic flux of the permanent magnet is detected by the Hall element 5 provided in the other specified position of the camera and the output of an amplifier 15 is inverted to a high level, causing the gate 12 to be closed by way of an inverter 13 and the diode D to be put out in the similar manner. With this constitution, the mounting of the interchangeable lens is surely and rapidly checked even in a dark place.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5045579A JPS55142322A (en) | 1979-04-24 | 1979-04-24 | Interchangeable lens mounting checker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5045579A JPS55142322A (en) | 1979-04-24 | 1979-04-24 | Interchangeable lens mounting checker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55142322A true JPS55142322A (en) | 1980-11-06 |
Family
ID=12859333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5045579A Pending JPS55142322A (en) | 1979-04-24 | 1979-04-24 | Interchangeable lens mounting checker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55142322A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5785035A (en) * | 1980-11-18 | 1982-05-27 | Olympus Optical Co Ltd | Information transmitting device for photographic lens |
| JPS58199330A (en) * | 1982-05-17 | 1983-11-19 | Minolta Camera Co Ltd | Data reader in camera system |
| JPS58211127A (en) * | 1982-06-02 | 1983-12-08 | Minolta Camera Co Ltd | Lens interchangeable type camera |
| JPS59157608A (en) * | 1983-02-28 | 1984-09-07 | Olympus Optical Co Ltd | Camera for endoscope |
| JPS60211442A (en) * | 1984-04-05 | 1985-10-23 | Matsushita Electric Ind Co Ltd | Video camera |
-
1979
- 1979-04-24 JP JP5045579A patent/JPS55142322A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5785035A (en) * | 1980-11-18 | 1982-05-27 | Olympus Optical Co Ltd | Information transmitting device for photographic lens |
| JPS58199330A (en) * | 1982-05-17 | 1983-11-19 | Minolta Camera Co Ltd | Data reader in camera system |
| JPS58211127A (en) * | 1982-06-02 | 1983-12-08 | Minolta Camera Co Ltd | Lens interchangeable type camera |
| JPS59157608A (en) * | 1983-02-28 | 1984-09-07 | Olympus Optical Co Ltd | Camera for endoscope |
| JPH0480366B2 (en) * | 1983-02-28 | 1992-12-18 | Olympus Optical Co | |
| JPS60211442A (en) * | 1984-04-05 | 1985-10-23 | Matsushita Electric Ind Co Ltd | Video camera |
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