JPS55125548A - Rotary type encoder and its preparation - Google Patents
Rotary type encoder and its preparationInfo
- Publication number
- JPS55125548A JPS55125548A JP3060979A JP3060979A JPS55125548A JP S55125548 A JPS55125548 A JP S55125548A JP 3060979 A JP3060979 A JP 3060979A JP 3060979 A JP3060979 A JP 3060979A JP S55125548 A JPS55125548 A JP S55125548A
- Authority
- JP
- Japan
- Prior art keywords
- original disk
- frequency
- regular
- recording
- recording bit
- 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
- Manufacturing Optical Record Carriers (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To obtain a recording bit of high precision and high division by continuously forming a recording bit, by rotating a master original disk, and irradiating an energy beam controlled by its regular frequency.
CONSTITUTION: A master original disk 1 is placed on the etching layer on the base plate, the original disk 1 is rotated in the regular rotational frequency by the rotary unit M, and a laser beam, etc. are irradiated on the recording layer of the original disk 1. The aforesaid beam is controlled by the regular frequency, and is gradually moved in the radial direction of the original disk 1 as the irradiation and stop are repeated in accordance with the above frequency. Accordingly, on the track of the recording layer is formed the recording bit 4 which has length and space decided by the speed of rotation of the original disk 1 and the control frequency of the beam.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3060979A JPS55125548A (en) | 1979-03-16 | 1979-03-16 | Rotary type encoder and its preparation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3060979A JPS55125548A (en) | 1979-03-16 | 1979-03-16 | Rotary type encoder and its preparation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55125548A true JPS55125548A (en) | 1980-09-27 |
Family
ID=12308608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3060979A Pending JPS55125548A (en) | 1979-03-16 | 1979-03-16 | Rotary type encoder and its preparation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125548A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5850637A (en) * | 1981-09-18 | 1983-03-25 | Matsushita Electric Ind Co Ltd | Disc-like recording medium |
EP0152940A2 (en) | 1984-02-17 | 1985-08-28 | Hitachi, Ltd. | Apparatus and method for detecting an air-fuel ratio |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52108155A (en) * | 1976-03-08 | 1977-09-10 | Cetec Corp | Shaft angle converter |
-
1979
- 1979-03-16 JP JP3060979A patent/JPS55125548A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52108155A (en) * | 1976-03-08 | 1977-09-10 | Cetec Corp | Shaft angle converter |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5850637A (en) * | 1981-09-18 | 1983-03-25 | Matsushita Electric Ind Co Ltd | Disc-like recording medium |
JPH0427613B2 (en) * | 1981-09-18 | 1992-05-12 | Matsushita Electric Ind Co Ltd | |
EP0152940A2 (en) | 1984-02-17 | 1985-08-28 | Hitachi, Ltd. | Apparatus and method for detecting an air-fuel ratio |
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