JPS5511220A - Lens for camera provided with code pattern - Google Patents
Lens for camera provided with code patternInfo
- Publication number
- JPS5511220A JPS5511220A JP8394378A JP8394378A JPS5511220A JP S5511220 A JPS5511220 A JP S5511220A JP 8394378 A JP8394378 A JP 8394378A JP 8394378 A JP8394378 A JP 8394378A JP S5511220 A JPS5511220 A JP S5511220A
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- lens
- fringes
- thru
- ring
- 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
- Indication In Cameras, And Counting Of Exposures (AREA)
Abstract
PURPOSE: To quantize lens information with a simple construction by attaching code patterns which are optically identifiable to a moving member such as aperture ring, distance ring, etc.
CONSTITUTION: Code patterns 4 for the purpose of quantizing aperture value information are formed by the fringes which are binary-coded to bright and dark in parallel with an aperture scale 3 on the outside surface of an aperture ring. In the configuration of the fringes, one set of friges corresponds to one aperture set value. Light from the patterns 4 is imaged and projected to the photo detectors 5 which are fixed on the camera side, by way of a reflecting mirror 6 and an imaging lens 7. The photoelectric outputs 100a thru 100e of the elements 5 are compared with the reference voltage 102a of a reference voltage generating circuit 102 in a comparator 101 and become digital signals 103a thru 103e. These signals are decoded by a decoder 104 and the decoded signals input to an arithmetic unit 105, where they are processed with other inputs and are then outputted to an exposure control unit 106 and display unit 107, whereby the control and display of shutter speeds are accomplished. Thereby, the quantization of lens information may be accomplished by the simple construction.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8394378A JPS5511220A (en) | 1978-07-12 | 1978-07-12 | Lens for camera provided with code pattern |
DE19792928057 DE2928057A1 (en) | 1978-07-12 | 1979-07-11 | LENS INFORMATION IMPORTER IN A CAMERA |
US06/056,857 US4236803A (en) | 1978-07-12 | 1979-07-12 | Lens for a camera provided with code patterns |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8394378A JPS5511220A (en) | 1978-07-12 | 1978-07-12 | Lens for camera provided with code pattern |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5511220A true JPS5511220A (en) | 1980-01-26 |
Family
ID=13816660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8394378A Pending JPS5511220A (en) | 1978-07-12 | 1978-07-12 | Lens for camera provided with code pattern |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5511220A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007293348A (en) * | 2006-04-24 | 2007-11-08 | Leica Camera Ag | Method for identifying interchangeable lens and camera system |
-
1978
- 1978-07-12 JP JP8394378A patent/JPS5511220A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007293348A (en) * | 2006-04-24 | 2007-11-08 | Leica Camera Ag | Method for identifying interchangeable lens and camera system |
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