JPS5680836A - Optical information reader - Google Patents
Optical information readerInfo
- Publication number
- JPS5680836A JPS5680836A JP15877779A JP15877779A JPS5680836A JP S5680836 A JPS5680836 A JP S5680836A JP 15877779 A JP15877779 A JP 15877779A JP 15877779 A JP15877779 A JP 15877779A JP S5680836 A JPS5680836 A JP S5680836A
- Authority
- JP
- Japan
- Prior art keywords
- coils
- resonator
- optical system
- attached
- way
- 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
- 230000003287 optical effect Effects 0.000 title abstract 6
- 239000000919 ceramic Substances 0.000 abstract 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To realize a miniaturization with a simple mechanism and facilitate an easy mass production for an optical information reader, by controlling the focus position of the optical system by an actuator consisting of a unit of piezoelectric resonator pulse two coils attached to the resonator.
CONSTITUTION: The resonator 18 attached with the optical system block 17 is supported by the springs 25W32 in a vertical/horizontal movable way. The piezoelectric ceramics 19 and the yoke 20 are attached to the resonator 18, and the magnets 21 and 22 plus coils 22 and 23 are installed inside the magnets and coils. Thus an actuator is constituted. The actuator receives the horizontal and vertical forces when the current flowing to the two coils is in the same way and in the opposite way to each other respectively. In such constitution, a variation of phase occurs to the reflected light in case the optical system is out of the pattern track. This variation is detected by the phase wave detector 34, and the fixed current is supplied to the coils 23 and 24 by the compensation signal generated from the compensation signal generator 35 to give the vertical or horizontal vibration to the resonator 18. As a result, the optical system can be made to follow onto the pattern in an accurate way. This following is also possible even when the focus has some shift.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15877779A JPS5680836A (en) | 1979-12-07 | 1979-12-07 | Optical information reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15877779A JPS5680836A (en) | 1979-12-07 | 1979-12-07 | Optical information reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5680836A true JPS5680836A (en) | 1981-07-02 |
Family
ID=15679103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15877779A Pending JPS5680836A (en) | 1979-12-07 | 1979-12-07 | Optical information reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5680836A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870437A (en) * | 1981-10-08 | 1983-04-26 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Optical scanning unit |
| FR2519458A1 (en) * | 1981-11-04 | 1983-07-08 | Sony Corp | OPTICAL HEAD, IN PARTICULAR FOR READING INFORMATION |
| US4669823A (en) * | 1983-10-31 | 1987-06-02 | Hitachi, Ltd. | Optical system drive for optical recording/reproducing apparatus |
| JPH02196448A (en) * | 1989-01-25 | 1990-08-03 | Nec Corp | Semiconductor device |
-
1979
- 1979-12-07 JP JP15877779A patent/JPS5680836A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870437A (en) * | 1981-10-08 | 1983-04-26 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Optical scanning unit |
| FR2519458A1 (en) * | 1981-11-04 | 1983-07-08 | Sony Corp | OPTICAL HEAD, IN PARTICULAR FOR READING INFORMATION |
| US4669823A (en) * | 1983-10-31 | 1987-06-02 | Hitachi, Ltd. | Optical system drive for optical recording/reproducing apparatus |
| JPH02196448A (en) * | 1989-01-25 | 1990-08-03 | Nec Corp | Semiconductor device |
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